Hello GUI!

1. Hello Label!
2. Hello Button!
3. Hello PopUp and Combo!
4. Hello Edit and UpDown!
5. Hello ListBox!
6. Hello Slider and Progress!
7. Hello TextView!
8. Hello TableView!
9. Hello SplitView!
10. Hello Modal Window!
11. Hello Gui Binding!
12. Hello Struct Binding!
13. Hello Sublayout!
14. Hello Subpanel!
15. Hello Multi-layout!
16. Hello Scroll-Panel!
17. Hello IP-Input!

GuiHello is an application, which by examples, shows Gui library features for the creation of user interfaces. The source code is in folder /src/howto/guihello of the SDK distribution.

1. Hello Label!

Capture of Label type interface controls. — Figure 1: Label controls.

Listing 1: demo/guihello/labels.c

/* Labels basics */

#include "labels.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static const char_t *i_LABEL_01 = "Hello.";
static const char_t *i_LABEL_02 = "Hello, I'm a Label.";
static const char_t *i_LABEL_03 = "Hello, I'm a Label, longer than first.";
static const char_t *i_LABEL_04 = "Hello, I'm a Label, longer than first and longer than second.";
static const char_t *i_LABEL_05 = "Hello, I'm a Label, longer than first, longer than second and longer than third.";
static const char_t *i_LABEL_06 = "Hello, I'm a Label, longer than first, longer than second, longer than third and longer than fourth.";
static const char_t *i_LABEL_07 = "Mouse sensitive label";

/*---------------------------------------------------------------------------*/

static void i_OnLayoutWidth(Layout *layout, Event *event)
{
    const EvButton *p = event_params(event, EvButton);
    real32_t width = 0;
    switch (p->index) {
    case 0:
        width = 0;
        break;
    case 1:
        width = 100;
        break;
    case 2:
        width = 200;
        break;
    case 3:
        width = 300;
        break;
    case 4:
        width = 400;
        break;
    cassert_default();
    }

    layout_hsize(layout, 0, width);
    layout_update(layout);
}

/*---------------------------------------------------------------------------*/

static PopUp *i_width_popup(Layout *layout)
{
    PopUp *popup = popup_create();
    popup_add_elem(popup, "Natural", NULL);
    popup_add_elem(popup, "100px", NULL);
    popup_add_elem(popup, "200px", NULL);
    popup_add_elem(popup, "300px", NULL);
    popup_add_elem(popup, "400px", NULL);
    popup_OnSelect(popup, listener(layout, i_OnLayoutWidth, Layout));
    return popup;
}

/*---------------------------------------------------------------------------*/

Panel *labels_single_line(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(1, 7);
    PopUp *popup = i_width_popup(layout);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    color_t c1 = gui_alt_color(color_rgb(192, 255, 255), color_rgb(48, 112, 112));
    color_t c2 = gui_alt_color(color_rgb(255, 192, 255), color_rgb(128, 48, 112));
    color_t c3 = gui_alt_color(color_rgb(255, 255, 192), color_rgb(112, 112, 48));
    label_text(label1, i_LABEL_01);
    label_text(label2, i_LABEL_02);
    label_text(label3, i_LABEL_03);
    label_text(label4, i_LABEL_04);
    label_text(label5, i_LABEL_05);
    label_text(label6, i_LABEL_06);
    label_bgcolor(label1, c1);
    label_bgcolor(label2, c2);
    label_bgcolor(label3, c3);
    label_bgcolor(label4, c1);
    label_bgcolor(label5, c2);
    label_bgcolor(label6, c3);
    layout_popup(layout, popup, 0, 0);
    layout_label(layout, label1, 0, 1);
    layout_label(layout, label2, 0, 2);
    layout_label(layout, label3, 0, 3);
    layout_label(layout, label4, 0, 4);
    layout_label(layout, label5, 0, 5);
    layout_label(layout, label6, 0, 6);
    layout_vmargin(layout, 0, 5);
    panel_layout(panel, layout);
    return panel;
}

/*---------------------------------------------------------------------------*/

Panel *labels_multi_line(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(1, 7);
    PopUp *popup = i_width_popup(layout);
    Label *label1 = label_multiline();
    Label *label2 = label_multiline();
    Label *label3 = label_multiline();
    Label *label4 = label_multiline();
    Label *label5 = label_multiline();
    Label *label6 = label_multiline();
    color_t c1 = gui_alt_color(color_rgb(192, 255, 255), color_rgb(48, 112, 112));
    color_t c2 = gui_alt_color(color_rgb(255, 192, 255), color_rgb(128, 48, 112));
    color_t c3 = gui_alt_color(color_rgb(255, 255, 192), color_rgb(112, 112, 48));
    label_text(label1, i_LABEL_01);
    label_text(label2, i_LABEL_02);
    label_text(label3, i_LABEL_03);
    label_text(label4, i_LABEL_04);
    label_text(label5, i_LABEL_05);
    label_text(label6, i_LABEL_06);
    label_bgcolor(label1, c1);
    label_bgcolor(label2, c2);
    label_bgcolor(label3, c3);
    label_bgcolor(label4, c1);
    label_bgcolor(label5, c2);
    label_bgcolor(label6, c3);
    label_align(label4, ekLEFT);
    label_align(label5, ekCENTER);
    label_align(label6, ekRIGHT);
    layout_popup(layout, popup, 0, 0);
    layout_label(layout, label1, 0, 1);
    layout_label(layout, label2, 0, 2);
    layout_label(layout, label3, 0, 3);
    layout_label(layout, label4, 0, 4);
    layout_label(layout, label5, 0, 5);
    layout_label(layout, label6, 0, 6);
    layout_vmargin(layout, 0, 5);
    panel_layout(panel, layout);
    return panel;
}

/*---------------------------------------------------------------------------*/

Panel *labels_mouse_over(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(1, 5);
    Font *font = font_system(20, ekFNORMAL | ekFPIXELS);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    label_text(label1, i_LABEL_07);
    label_text(label2, i_LABEL_07);
    label_text(label3, i_LABEL_07);
    label_text(label4, i_LABEL_07);
    label_text(label5, i_LABEL_07);
    label_font(label1, font);
    label_font(label2, font);
    label_font(label3, font);
    label_font(label4, font);
    label_font(label5, font);
    label_color_over(label1, kCOLOR_RED);
    label_color_over(label2, kCOLOR_RED);
    label_color_over(label3, kCOLOR_RED);
    label_color_over(label4, kCOLOR_RED);
    label_color_over(label5, kCOLOR_RED);
    label_style_over(label1, ekFBOLD);
    label_style_over(label2, ekFITALIC);
    label_style_over(label3, ekFSTRIKEOUT);
    label_style_over(label4, ekFUNDERLINE);
    label_bgcolor_over(label5, kCOLOR_CYAN);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 2);
    layout_label(layout, label4, 0, 3);
    layout_label(layout, label5, 0, 4);
    panel_layout(panel, layout);
    font_destroy(&font);
    return panel;
}

2. Hello Button!

Capture of Button type interface controls. — Figure 2: Button controls.

Listing 2: demo/guihello/buttons.c

/* Buttons demo */

#include "buttons.h"
#include "res_guihello.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static Layout *i_flatbuttons(void)
{
    Layout *layout = layout_create(6, 1);
    Button *button1 = button_flat();
    Button *button2 = button_flat();
    Button *button3 = button_flat();
    Button *button4 = button_flat();
    Button *button5 = button_flat();
    Button *button6 = button_flat();
    button_text(button1, "Open File");
    button_text(button2, "Save File");
    button_text(button3, "Search File");
    button_text(button4, "Edit File");
    button_text(button5, "Add File");
    button_text(button6, "Delete File");
    button_image(button1, gui_image(FOLDER24_PNG));
    button_image(button2, gui_image(DISK24_PNG));
    button_image(button3, gui_image(SEARCH24_PNG));
    button_image(button4, gui_image(EDIT24_PNG));
    button_image(button5, gui_image(PLUS24_PNG));
    button_image(button6, gui_image(ERROR24_PNG));
    layout_button(layout, button1, 0, 0);
    layout_button(layout, button2, 1, 0);
    layout_button(layout, button3, 2, 0);
    layout_button(layout, button4, 3, 0);
    layout_button(layout, button5, 4, 0);
    layout_button(layout, button6, 5, 0);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_radios(void)
{
    Layout *layout = layout_create(1, 4);
    Button *radio1 = button_radio();
    Button *radio2 = button_radio();
    Button *radio3 = button_radio();
    Button *radio4 = button_radio();
    button_text(radio1, "&Wireframe");
    button_text(radio2, "&Shaded");
    button_text(radio3, "&Realistic");
    button_text(radio4, "&V-Ray");
    button_state(radio1, ekGUI_ON);
    layout_button(layout, radio1, 0, 0);
    layout_button(layout, radio2, 0, 1);
    layout_button(layout, radio3, 0, 2);
    layout_button(layout, radio4, 0, 3);
    layout_margin(layout, 5);
    layout_vmargin(layout, 0, 3);
    layout_vmargin(layout, 1, 3);
    layout_vmargin(layout, 2, 3);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_checks(void)
{
    Layout *layout = layout_create(1, 4);
    Button *check1 = button_check();
    Button *check2 = button_check();
    Button *check3 = button_check();
    Button *check4 = button_check();
    button_text(check1, "&Lines");
    button_text(check2, "M&eshes");
    button_text(check3, "M&aterials");
    button_text(check4, "L&ights");
    button_state(check1, ekGUI_ON);
    button_state(check2, ekGUI_OFF);
    button_state(check3, ekGUI_OFF);
    button_state(check4, ekGUI_ON);
    layout_button(layout, check1, 0, 0);
    layout_button(layout, check2, 0, 1);
    layout_button(layout, check3, 0, 2);
    layout_button(layout, check4, 0, 3);
    layout_margin(layout, 5);
    layout_vmargin(layout, 0, 3);
    layout_vmargin(layout, 1, 3);
    layout_vmargin(layout, 2, 3);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_pushes(Button **defbutton)
{
    Layout *layout = layout_create(4, 1);
    Button *button1 = button_push();
    Button *button2 = button_push();
    Button *button3 = button_push();
    button_text(button1, "Re&try");
    button_text(button2, "&Cancel");
    button_text(button3, "&Ok");
    button_image(button1, gui_image(RETRY_PNG));
    layout_button(layout, button1, 0, 0);
    layout_button(layout, button2, 2, 0);
    layout_button(layout, button3, 3, 0);
    layout_hmargin(layout, 2, 5);
    layout_hexpand(layout, 1);
    *defbutton = button1;
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_buttons(Button **defbutton)
{
    Layout *layout = layout_create(1, 3);
    Layout *layout1 = i_flatbuttons();
    Layout *layout2 = layout_create(2, 2);
    Layout *layout3 = i_radios();
    Layout *layout4 = i_checks();
    Layout *layout5 = i_pushes(defbutton);
    Button *check1 = button_check();
    Button *check2 = button_check3();
    button_text(check1, "Enable 3&D Render");
    button_text(check2, "Enable &Preview Settings");
    button_state(check1, ekGUI_ON);
    button_state(check2, ekGUI_MIXED);
    layout_layout(layout, layout1, 0, 0);
    layout_button(layout2, check1, 0, 0);
    layout_layout(layout2, layout3, 0, 1);
    layout_button(layout2, check2, 1, 0);
    layout_layout(layout2, layout4, 1, 1);
    layout_layout(layout, layout2, 0, 1);
    layout_layout(layout, layout5, 0, 2);
    layout_halign(layout, 0, 0, ekLEFT);
    layout_margin(layout2, 5);
    layout_hmargin(layout2, 0, 10);
    layout_margin(layout5, 5);
    return layout;
}

/*---------------------------------------------------------------------------*/

Panel *buttons_basics(Button **defbutton)
{
    Layout *layout = i_buttons(defbutton);
    Panel *panel = panel_create();
    panel_layout(panel, layout);
    return panel;
}

3. Hello PopUp and Combo!

Capture of Combo type interface controls. — Figure 4: Combo controls.

Listing 3: demo/guihello/popcom.c

/* PopUp and Combo */

#include "popcom.h"
#include "res_guihello.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static void i_popups(Layout *layout)
{
    Label *label1 = label_create();
    Label *label2 = label_create();
    PopUp *popup1 = popup_create();
    PopUp *popup2 = popup_create();
    label_text(label1, "Language:");
    label_text(label2, "Color:");
    popup_add_elem(popup1, "English", (const Image*)UKING_PNG);
    popup_add_elem(popup1, "Español", (const Image*)SPAIN_PNG);
    popup_add_elem(popup1, "Portugues", (const Image*)PORTUGAL_PNG);
    popup_add_elem(popup1, "Italiana", (const Image*)ITALY_PNG);
    popup_add_elem(popup1, "Tiếng Việt", (const Image*)VIETNAM_PNG);
    popup_add_elem(popup1, "России", (const Image*)RUSSIA_PNG);
    popup_add_elem(popup1, "日本語", (const Image*)JAPAN_PNG);
    popup_add_elem(popup2, "Red", (const Image*)RED_PNG);
    popup_add_elem(popup2, "Blue", (const Image*)BLUE_PNG);
    popup_add_elem(popup2, "Green", (const Image*)GREEN_PNG);
    popup_add_elem(popup2, "Yellow", (const Image*)YELLOW_PNG);
    popup_add_elem(popup2, "Black", (const Image*)BLACK_PNG);
    popup_add_elem(popup2, "White", (const Image*)WHITE_PNG);
    popup_list_height(popup1, 10);
    popup_list_height(popup2, 10);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_popup(layout, popup1, 1, 0);
    layout_popup(layout, popup2, 1, 1);
}

/*---------------------------------------------------------------------------*/

static void i_combos(Layout *layout)
{
    Label *label1 = label_create();
    Label *label2 = label_create();
    Combo *combo1 = combo_create();
    Combo *combo2 = combo_create();
    label_text(label1, "Search:");
    label_text(label2, "Folder:");
    combo_add_elem(combo1, "Search", NULL);
    combo_add_elem(combo1, "Disk", NULL);
    combo_add_elem(combo1, "Edit", NULL);
    combo_add_elem(combo2, "/home/fran/Desktop", NULL);
    combo_add_elem(combo2, "/usr/include", NULL);
    combo_add_elem(combo2, "/mnt/volume1", NULL);
    combo_add_elem(combo2, "/etc/html/log.txt", NULL);
    layout_label(layout, label1, 2, 0);
    layout_label(layout, label2, 2, 1);
    layout_combo(layout, combo1, 3, 0);
    layout_combo(layout, combo2, 3, 1);
}

/*---------------------------------------------------------------------------*/

Panel *popup_combo(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(4, 2);
    i_popups(layout);
    i_combos(layout);
    layout_margin(layout, 10.f);
    layout_vmargin(layout, 0, 10.f);
    layout_hmargin(layout, 0, 5.f);
    layout_hmargin(layout, 1, 10.f);
    layout_hmargin(layout, 2, 5.f);
    layout_hsize(layout, 1, 150.f);
    layout_hsize(layout, 3, 150.f);
    panel_layout(panel, layout);
    return panel;
}

4. Hello Edit and UpDown!

Capture of Edit and UpDown type interface controls. — Figure 5: Edit and UpDown controls.

Listing 4: demo/guihello/form.c

/* Form demo */

#include "form.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static void i_OnFilter(void *noused, Event *e)
{
    const EvText *params = event_params(e, EvText);
    EvTextFilter *result = event_result(e, EvTextFilter);
    uint32_t i = 0, j = 0;
    while (params->text[i] != '\0')
    {
        if (params->text[i] >= '0' && params->text[i] <= '9')
        {
            result->text[j] = params->text[i];
            j += 1;
        }

        i += 1;
    }

    result->text[j] = '\0';
    result->apply = TRUE;
    unref(noused);
}

/*---------------------------------------------------------------------------*/

static void i_OnUpDown(Edit *edit, Event *e)
{
    const EvButton *params = event_params(e, EvButton);
    int32_t n = str_to_i32(edit_get_text(edit), 10, NULL);
    char_t text[64];
    n += (params->index == 0) ? 1 : -1;
    bstd_sprintf(text, sizeof(text), "%d", n);
    edit_text(edit, text);
}

/*---------------------------------------------------------------------------*/

static Layout *i_numbers(color_t colorbg)
{
    Layout *layout = layout_create(5, 1);
    Label *label = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    UpDown *updown1 = updown_create();
    UpDown *updown2 = updown_create();
    label_text(label, "Height (cm):");
    edit_text(edit1, "25");
    edit_text(edit2, "175");
    edit_align(edit1, ekRIGHT);
    edit_align(edit2, ekRIGHT);
    edit_OnFilter(edit1, listener(NULL, i_OnFilter, void));
    edit_OnFilter(edit2, listener(NULL, i_OnFilter, void));
    edit_bgcolor_focus(edit1, colorbg);
    edit_bgcolor_focus(edit2, colorbg);
    updown_OnClick(updown1, listener(edit1, i_OnUpDown, Edit));
    updown_OnClick(updown2, listener(edit2, i_OnUpDown, Edit));
    updown_tooltip(updown1, "Increase/Decrease age");
    updown_tooltip(updown2, "Increase/Decrease height");
    layout_label(layout, label, 2, 0);
    layout_edit(layout, edit1, 0, 0);
    layout_edit(layout, edit2, 3, 0);
    layout_updown(layout, updown1, 1, 0);
    layout_updown(layout, updown2, 4, 0);
    layout_hmargin(layout, 1, 10.f);
    layout_hmargin(layout, 2, 10.f);
    layout_hexpand2(layout, 0, 3, .5f);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_edits(void)
{
    color_t colorbg = gui_alt_color(color_bgr(0xFFFFe4), color_bgr(0x101010));
    Layout *layout1 = layout_create(2, 6);
    Layout *layout2 = i_numbers(colorbg);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    Edit *edit3 = edit_create();
    Edit *edit4 = edit_create();
    Edit *edit5 = edit_create();
    label_text(label1, "User Name:");
    label_text(label2, "Password:");
    label_text(label3, "Address:");
    label_text(label4, "City:");
    label_text(label5, "Phone:");
    label_text(label6, "Age:");
    label_color_over(label1, color_rgb(255, 128, 52));
    label_color_over(label2, color_rgb(70, 129, 207));
    label_color_over(label3, color_rgb(119, 188, 31));
    label_style_over(label4, ekFITALIC | ekFUNDERLINE);
    edit_text(edit1, "Amanda Callister");
    edit_text(edit2, "aQwe56nhjJk");
    edit_text(edit3, "35, Tuam Road");
    edit_text(edit4, "Galway - Ireland");
    edit_text(edit5, "+35 654 333 000");
    edit_passmode(edit2, TRUE);
    edit_bgcolor_focus(edit1, colorbg);
    edit_bgcolor_focus(edit2, colorbg);
    edit_bgcolor_focus(edit3, colorbg);
    edit_bgcolor_focus(edit4, colorbg);
    edit_bgcolor_focus(edit5, colorbg);
    layout_label(layout1, label1, 0, 0);
    layout_label(layout1, label2, 0, 1);
    layout_label(layout1, label3, 0, 2);
    layout_label(layout1, label4, 0, 3);
    layout_label(layout1, label5, 0, 4);
    layout_label(layout1, label6, 0, 5);
    layout_edit(layout1, edit1, 1, 0);
    layout_edit(layout1, edit2, 1, 1);
    layout_edit(layout1, edit3, 1, 2);
    layout_edit(layout1, edit4, 1, 3);
    layout_edit(layout1, edit5, 1, 4);
    layout_layout(layout1, layout2, 1, 5);
    layout_hmargin(layout1, 0, 5);
    layout_hexpand(layout1, 1);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 5);
    layout_vmargin(layout1, 2, 5);
    layout_vmargin(layout1, 3, 5);
    layout_vmargin(layout1, 4, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_form(void)
{
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = i_edits();
    Label *label = label_multiline();
    label_text(label, "Please fill in all the information on the form. We will use this data to send commercial mail at all hours, not caring much if it bothers you or not.");
    label_color(label, gui_alt_color(color_rgb(255, 0, 0), color_rgb(180, 180, 180)));
    label_bgcolor(label, gui_alt_color(color_rgb(216, 191, 216), color_rgb(80, 40, 40)));
    label_bgcolor_over(label, gui_alt_color(color_rgb(255, 250, 205), color_rgb(105, 100, 55)));
    label_style_over(label, ekFUNDERLINE);
    layout_layout(layout1, layout2, 0, 0);
    layout_label(layout1, label, 0, 1);
    layout_hsize(layout1, 0, 300);
    layout_vmargin(layout1, 0, 10);
    layout_margin(layout1, 10);
    return layout1;
}

/*---------------------------------------------------------------------------*/

Panel *form_basic(void)
{
    Layout *layout = i_form();
    Panel *panel = panel_create();
    panel_layout(panel, layout);
    return panel;
}

5. Hello ListBox!

Capture of ListBox-like interface controls. — Figure 6: ListBox controls.

Listing 5: demo/guihello/listboxes.c

/* Listboxes */

#include "listboxes.h"
#include "res_guihello.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static ListBox *i_full_listbox(void)
{
    ListBox *listbox = listbox_create();
    listbox_size(listbox, s2df(150, 200));
    listbox_multisel(listbox, TRUE);
    listbox_checkbox(listbox, TRUE);
    listbox_add_elem(listbox, "Sales presentation", gui_image(POWERPOINT_PNG));
    listbox_add_elem(listbox, "Balance 2017", gui_image(POWERPOINT_PNG));
    listbox_add_elem(listbox, "The Last of Us Analysis", gui_image(POWERPOINT_PNG));
    listbox_add_elem(listbox, "Phone list", gui_image(ACCESS_PNG));
    listbox_add_elem(listbox, "Customer database", gui_image(ACCESS_PNG));
    listbox_add_elem(listbox, "My first book", gui_image(WORD_PNG));
    listbox_add_elem(listbox, "Letter to April", gui_image(WORD_PNG));
    listbox_add_elem(listbox, "Cookbook Recipes", gui_image(WORD_PNG));
    listbox_add_elem(listbox, "Dog playing piano", gui_image(JPG_PNG));
    listbox_add_elem(listbox, "Hollidays 2019", gui_image(JPG_PNG));
    listbox_add_elem(listbox, "Amanda's party", gui_image(JPG_PNG));
    listbox_add_elem(listbox, "Flying", gui_image(JPG_PNG));
    listbox_add_elem(listbox, "The C Programing Language", gui_image(PDF_PNG));
    listbox_add_elem(listbox, "Graphics Programing with GDI+", gui_image(PDF_PNG));
    listbox_add_elem(listbox, "Personal finances", gui_image(EXCEL_PNG));
    listbox_add_elem(listbox, "Stocks 2017", gui_image(EXCEL_PNG));
    listbox_add_elem(listbox, "Website Dashboard", gui_image(EXCEL_PNG));
    listbox_add_elem(listbox, "Open Issues", gui_image(DOCUMENT_PNG));
    listbox_add_elem(listbox, "TODO List", gui_image(DOCUMENT_PNG));
    listbox_select(listbox, 0, TRUE);
    return listbox;
}

/*---------------------------------------------------------------------------*/

static ListBox *i_image_listbox(void)
{
    ListBox *listbox = listbox_create();
    listbox_size(listbox, s2df(150, 200));
    listbox_add_elem(listbox, "Spain", gui_image(SPAIN_PNG));
    listbox_add_elem(listbox, "Italy", gui_image(ITALY_PNG));
    listbox_add_elem(listbox, "United Kingdom", gui_image(UKING_PNG));
    listbox_add_elem(listbox, "Vietnam", gui_image(VIETNAM_PNG));
    listbox_add_elem(listbox, "Russia", gui_image(RUSSIA_PNG));
    listbox_add_elem(listbox, "Portugal", gui_image(PORTUGAL_PNG));
    listbox_add_elem(listbox, "Japan", gui_image(JAPAN_PNG));
    listbox_add_elem(listbox, "Disk", gui_image(DISK16_PNG));
    listbox_add_elem(listbox, "Edit", gui_image(EDIT16_PNG));
    listbox_add_elem(listbox, "Folder", gui_image(FOLDER16_PNG));
    listbox_add_elem(listbox, "Restore", gui_image(RESTORE16_PNG));
    listbox_add_elem(listbox, "Search", gui_image(SEARCH16_PNG));
    listbox_add_elem(listbox, "Error", gui_image(ERROR16_PNG));
    listbox_select(listbox, 0, TRUE);
    return listbox;
}

/*---------------------------------------------------------------------------*/

static ListBox *i_simple_listbox(void)
{
    ListBox *listbox = listbox_create();
    listbox_size(listbox, s2df(150, 200));
    listbox_add_elem(listbox, "Item 1", NULL);
    listbox_add_elem(listbox, "Item 2", NULL);
    listbox_add_elem(listbox, "Item 3", NULL);
    listbox_add_elem(listbox, "Item 4", NULL);
    listbox_select(listbox, 0, TRUE);
    return listbox;
}

/*---------------------------------------------------------------------------*/

Panel *listboxes(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(3, 2);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    ListBox *listbox1 = i_simple_listbox();
    ListBox *listbox2 = i_image_listbox();
    ListBox *listbox3 = i_full_listbox();
    label_text(label1, "Simple ListBox");
    label_text(label2, "With Images");
    label_text(label3, "Checks and Multiselect");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 1, 0);
    layout_label(layout, label3, 2, 0);
    layout_listbox(layout, listbox1, 0, 1);
    layout_listbox(layout, listbox2, 1, 1);
    layout_listbox(layout, listbox3, 2, 1);
    layout_hmargin(layout, 0, 10);
    layout_hmargin(layout, 1, 10);
    layout_vmargin(layout, 0, 5);
    panel_layout(panel, layout);
    return panel;
}

6. Hello Slider and Progress!

Capture of Slider and Progress type interface controls. — Figure 7: Slider and Progress controls.

Listing 6: demo/guihello/sliders.c

/* Sliders */

#include "sliders.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static void i_OnSlider(Progress *prog, Event *event)
{
    const EvSlider *params = event_params(event, EvSlider);
    progress_value(prog, params->pos);
}

/*---------------------------------------------------------------------------*/

Panel *sliders(void)
{
    Layout *layout1 = layout_create(2, 1);
    Layout *layout2 = layout_create(1, 8);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    Slider *slider3 = slider_vertical();
    Progress *prog1 = progress_create();
    Progress *prog2 = progress_create();
    Panel *panel = panel_create();
    label_text(label1, "Slider");
    label_text(label2, "Slider (discrete 6 steps)");
    label_text(label3, "Progress Bar");
    label_text(label4, "Progress Undefined");
    slider_steps(slider2, 6);
    slider_tooltip(slider1, "Horizontal Slider");
    slider_tooltip(slider2, "Horizontal Discrete Slider");
    slider_tooltip(slider3, "Vertical Slider");
    slider_OnMoved(slider1, listener(prog1, i_OnSlider, Progress));
    progress_undefined(prog2, TRUE);
    layout_label(layout2, label1, 0, 0);
    layout_label(layout2, label2, 0, 2);
    layout_label(layout2, label3, 0, 4);
    layout_label(layout2, label4, 0, 6);
    layout_slider(layout2, slider1, 0, 1);
    layout_slider(layout2, slider2, 0, 3);
    layout_slider(layout1, slider3, 1, 0);
    layout_progress(layout2, prog1, 0, 5);
    layout_progress(layout2, prog2, 0, 7);
    layout_hsize(layout2, 0, 300);
    layout_layout(layout1, layout2, 0, 0);
    layout_vmargin(layout2, 0, 5);
    layout_vmargin(layout2, 1, 5);
    layout_vmargin(layout2, 2, 5);
    layout_vmargin(layout2, 3, 5);
    layout_vmargin(layout2, 4, 5);
    layout_vmargin(layout2, 5, 5);
    layout_vmargin(layout2, 6, 5);
    layout_hmargin(layout1, 0, 10);
    panel_layout(panel, layout1);
    return panel;
}

7. Hello TextView!

Rich text view from an RTF file. — Figure 8: Rich text control.

Listing 7: demo/guihello/textviews.c

/* Use of textviews */

#include "textviews.h"
#include "res_guihello.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static void i_set_rtf(TextView *text)
{
    ResPack *pack = res_guihello_respack("");
    uint32_t size = 0;
    const byte_t *data = respack_file(pack, TEXTVIEW_RTF, &size);
    Stream *stm = stm_from_block(data, size);
    textview_rtf(text, stm);
    stm_close(&stm);
    respack_destroy(&pack);
}

/*---------------------------------------------------------------------------*/

static void i_set_hard_coding(TextView *text)
{
    textview_units(text, ekFPOINTS);
    textview_lspacing(text, 1.15f);
    textview_afspace(text, 10);
    textview_family(text, "Arial");
    textview_fsize(text, 16);
    textview_writef(text, "What is Lorem Ipsum?\n");
    textview_fsize(text, 11);
    textview_writef(text, "Lorem Ipsum ");
    textview_fstyle(text, ekFBOLD);
    textview_writef(text, "is simply");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, " dummy text of the ");
    textview_fstyle(text, ekFITALIC);
    textview_writef(text, "printing and typesetting ");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, "industry. ");
    textview_fsize(text, 16);
    textview_color(text, color_rgb(255, 0, 0));
    textview_writef(text, "Lorem Ipsum ");
    textview_color(text, kCOLOR_DEFAULT);
    textview_fsize(text, 11);
    textview_writef(text, "has been the ");
    textview_family(text, "Courier New");
    textview_fsize(text, 14);
    textview_writef(text, "[industry's standard] ");
    textview_family(text, "Arial");
    textview_fsize(text, 11);
    textview_fstyle(text, ekFUNDERLINE);
    textview_writef(text, "dummy text");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, " ever ");
    textview_fstyle(text, ekFSTRIKEOUT);
    textview_writef(text, "since the 1500s");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, ", when an ");
    textview_color(text, color_rgb(0, 176, 80));
    textview_writef(text, "unknown printer ");
    textview_color(text, kCOLOR_DEFAULT);
    textview_writef(text, "took a galley of type and scrambled it to make a type specimen book");
    textview_fstyle(text, ekFITALIC);
    textview_color(text, color_rgb(0, 77, 187));
    textview_bgcolor(text, color_rgb(192, 192, 192));
    textview_writef(text, ". It has survived not only five centuries");
    textview_fstyle(text, ekFNORMAL);
    textview_color(text, kCOLOR_DEFAULT);
    textview_bgcolor(text, kCOLOR_DEFAULT);
    textview_writef(text, ", but also the leap into electronic typesetting, remaining essentially unchanged.");
}

/*---------------------------------------------------------------------------*/

Panel *textviews(void)
{
    Layout *layout = layout_create(1, 4);
    Label *label1 = label_create();
    Label *label2 = label_create();
    TextView *text1 = textview_create();
    TextView *text2 = textview_create();
    Panel *panel = panel_create();
    label_text(label1, "From RTF data");
    label_text(label2, "Hard coding");
    textview_size(text1, s2df(450, 250));
    textview_size(text2, s2df(450, 250));
    i_set_rtf(text1);
    i_set_hard_coding(text2);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 2);
    layout_textview(layout, text1, 0, 1);
    layout_textview(layout, text2, 0, 3);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 1, 10);
    layout_vmargin(layout, 2, 5);
    panel_layout(panel, layout);
    return panel;
}

8. Hello TableView!

Tabulated data view in a table control. — Figure 9: Table control.

Listing 8: demo/guihello/table.c

/* Use of tables */

#include "table.h"
#include <gui/guiall.h>

typedef struct _appdata_t AppData;

struct _appdata_t
{
    TableView *table;
    TextView *text;
    char_t temp_string[256];
};

/*---------------------------------------------------------------------------*/

static void i_destroy_appdata(AppData** data)
{
    heap_delete(data, AppData);
}

/*---------------------------------------------------------------------------*/

/* AppData must contain the real data access(array, stream, etc) */
static void i_OnTableData(AppData *data, Event *e)
{
    uint32_t etype = event_type(e);

    switch(etype) {
    case ekGUI_EVENT_TBL_NROWS:
    {
        uint32_t *n = event_result(e, uint32_t);
        *n = 100;
        break;
    }

    case ekGUI_EVENT_TBL_CELL:
    {
        const EvTbPos *pos = event_params(e, EvTbPos);
        EvTbCell *cell = event_result(e, EvTbCell);

        switch(pos->col) {
        case 0:
            cell->align = ekLEFT;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "Name %d", pos->row);
            break;

        case 1:
            cell->align = ekLEFT;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "Adress %d", pos->row);
            break;

        case 2:
            cell->align = ekLEFT;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "City %d", pos->row);
            break;

        case 3:
            cell->align = ekRIGHT;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "%d", pos->row);
            break;

        case 4:
            cell->align = ekRIGHT;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "%.2f", 10.5f + pos->row);
            break;

        case 5:
            cell->align = ekCENTER;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "Extra Data 1 %d", pos->row);
            break;

        case 6:
            cell->align = ekCENTER;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "Extra Data 2 %d", pos->row);
            break;

        case 7:
            cell->align = ekCENTER;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "Extra Data 3 %d", pos->row);
            break;

        case 8:
            cell->align = ekCENTER;
            bstd_sprintf(data->temp_string, sizeof(data->temp_string), "Extra Data 4 %d", pos->row);
            break;

        cassert_default();
        }

        cell->text = data->temp_string;
        break;
    }
    }
}

/*---------------------------------------------------------------------------*/

static void i_OnHeaderClick(AppData *data, Event *e)
{
    const EvButton *p = event_params(e, EvButton);
    textview_printf(data->text, "Click on Header: %d\n", p->index);
}

/*---------------------------------------------------------------------------*/

static void i_OnMultisel(AppData *data, Event *e)
{
    const EvButton *p = event_params(e, EvButton);
    if (p->index == 0)
        tableview_multisel(data->table, FALSE, FALSE);
    else if (p->index == 1)
        tableview_multisel(data->table, TRUE, FALSE);
    else if (p->index == 2)
        tableview_multisel(data->table, TRUE, TRUE);
}

/*---------------------------------------------------------------------------*/

static void i_OnResizeCheck(AppData *data, Event *e)
{
    const EvButton *p = event_params(e, EvButton);
    bool_t resizable = p->state == ekGUI_ON ? TRUE : FALSE;
    tableview_header_resizable(data->table, resizable);
}

/*---------------------------------------------------------------------------*/

static void i_OnHeaderCheck(AppData *data, Event *e)
{
    const EvButton *p = event_params(e, EvButton);
    bool_t clickable = p->state == ekGUI_ON ? TRUE : FALSE;
    tableview_header_clickable(data->table, clickable);
}

/*---------------------------------------------------------------------------*/

static void i_OnFreezeCheck(AppData *data, Event *e)
{
    const EvButton *p = event_params(e, EvButton);
    uint32_t col_freeze = p->state == ekGUI_ON ? 1 : UINT32_MAX;
    tableview_column_freeze(data->table, col_freeze);
}

/*---------------------------------------------------------------------------*/

static void i_OnGridCheck(AppData *data, Event *e)
{
    const EvButton *p = event_params(e, EvButton);
    bool_t grid = p->state == ekGUI_ON ? TRUE : FALSE;
    tableview_grid(data->table, grid, grid);
}

/*---------------------------------------------------------------------------*/

static void i_OnPrintsel(AppData *data, Event *e)
{
    const ArrSt(uint32_t) *sel = tableview_selected(data->table);
    uint32_t n = arrst_size(sel, uint32_t);
    textview_writef(data->text, "Selected rows: ");
    arrst_foreach_const(row, sel, uint32_t)
        textview_printf(data->text, "%d", *row);
        if (row_i < n - 1)
            textview_writef(data->text, ", ");
    arrst_end();
    textview_writef(data->text, "\n");
    unref(e);
}

/*---------------------------------------------------------------------------*/

static Layout* i_table_control_layout(AppData *data)
{
    Layout *layout1 = layout_create(3, 1);
    Layout *layout2 = layout_create(1, 6);
    Button *button1 = button_radio();
    Button *button2 = button_radio();
    Button *button3 = button_radio();
    Button *button4 = button_check();
    Button *button5 = button_check();
    Button *button6 = button_check();
    Button *button7 = button_check();
    Button *button8 = button_push();
    button_text(button1, "Single select");
    button_text(button2, "Multi select");
    button_text(button3, "Preserve select");
    button_text(button4, "Resizable headers");
    button_text(button5, "Clickable headers");
    button_text(button6, "Freeze 0 and 1 columns");
    button_text(button7, "Draw grid lines");
    button_text(button8, "Print selected rows");
    button_state(button1, ekGUI_ON);
    button_state(button4, ekGUI_ON);
    button_state(button5, ekGUI_ON);
    button_state(button6, ekGUI_ON);
    button_state(button7, ekGUI_ON);
    layout_button(layout1, button1, 0, 0);
    layout_button(layout1, button2, 1, 0);
    layout_button(layout1, button3, 2, 0);
    layout_layout(layout2, layout1, 0, 0);
    layout_button(layout2, button4, 0, 1);
    layout_button(layout2, button5, 0, 2);
    layout_button(layout2, button6, 0, 3);
    layout_button(layout2, button7, 0, 4);
    layout_button(layout2, button8, 0, 5);
    layout_hmargin(layout1, 0, 5.f);
    layout_hmargin(layout1, 1, 5.f);
    layout_vmargin(layout2, 0, 5.f);
    layout_vmargin(layout2, 1, 5.f);
    layout_vmargin(layout2, 2, 5.f);
    layout_vmargin(layout2, 3, 5.f);
    layout_vmargin(layout2, 4, 5.f);
    layout_halign(layout2, 0, 0, ekLEFT);
    layout_halign(layout2, 0, 5, ekLEFT);
    button_OnClick(button1, listener(data, i_OnMultisel, AppData));
    button_OnClick(button2, listener(data, i_OnMultisel, AppData));
    button_OnClick(button3, listener(data, i_OnMultisel, AppData));
    button_OnClick(button4, listener(data, i_OnResizeCheck, AppData));
    button_OnClick(button5, listener(data, i_OnHeaderCheck, AppData));
    button_OnClick(button6, listener(data, i_OnFreezeCheck, AppData));
    button_OnClick(button7, listener(data, i_OnGridCheck, AppData));
    button_OnClick(button8, listener(data, i_OnPrintsel, AppData));
    return layout2;
}

/*---------------------------------------------------------------------------*/

Panel *table_view(void)
{
    Panel *panel = panel_create();
    AppData *data = heap_new0(AppData);
    TableView *table = tableview_create();
    TextView *text = textview_create();
    Layout *layout1 = layout_create(1, 3);
    Layout *layout2 = i_table_control_layout(data);
    data->table = table;
    data->text = text;
    tableview_size(table, s2df(500, 300));
    tableview_OnData(table, listener(data, i_OnTableData, AppData));
    tableview_OnHeaderClick(table, listener(data, i_OnHeaderClick, AppData));
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_new_column_text(table);
    tableview_header_clickable(table, TRUE);
    tableview_header_resizable(table, TRUE);
    tableview_header_indicator(table, 1, ekINDDOWN_ARROW);
    tableview_header_indicator(table, 2, ekINDUP_ARROW);
    tableview_header_title(table, 0, "Name");
    tableview_header_title(table, 1, "Address");
    tableview_header_title(table, 2, "City");
    tableview_header_title(table, 3, "Age");
    tableview_header_title(table, 4, "Value");
    tableview_header_title(table, 5, "Extra\nData 1");
    tableview_header_title(table, 6, "Extra\nData 2");
    tableview_header_title(table, 7, "Extra\nData 3");
    tableview_header_title(table, 8, "Extra\nData 4");
    tableview_column_width(table, 0, 100);
    tableview_column_width(table, 1, 105);
    tableview_column_width(table, 2, 50);
    tableview_column_width(table, 3, 50);
    tableview_column_width(table, 4, 170);
    tableview_column_width(table, 5, 200);
    tableview_column_width(table, 6, 200);
    tableview_column_width(table, 7, 200);
    tableview_column_width(table, 8, 200);
    tableview_column_limits(table, 2, 50, 100);
    tableview_column_freeze(table, 1);
    tableview_header_align(table, 0, ekLEFT);
    tableview_header_align(table, 1, ekLEFT);
    tableview_header_align(table, 2, ekLEFT);
    tableview_header_align(table, 3, ekRIGHT);
    tableview_header_align(table, 4, ekRIGHT);
    tableview_header_align(table, 5, ekCENTER);
    tableview_header_align(table, 6, ekCENTER);
    tableview_header_align(table, 7, ekCENTER);
    tableview_header_align(table, 8, ekCENTER);
    tableview_multisel(table, FALSE, FALSE);
    tableview_header_visible(table, TRUE);
    tableview_grid(table, TRUE, TRUE);
    tableview_update(table);

    {
        uint32_t row = 20;
        tableview_select(table, &row, 1);
        tableview_focus_row(table, row, ekBOTTOM);
    }

    layout_layout(layout1, layout2, 0, 0);
    layout_tableview(layout1, table, 0, 1);
    layout_textview(layout1, text, 0, 2);
    layout_vmargin(layout1, 0, 5.f);
    layout_vmargin(layout1, 1, 5.f);
    panel_data(panel, &data, i_destroy_appdata, AppData);
    panel_layout(panel, layout1);
    return panel;
}

9. Hello SplitView!

Multiple SplitViews in the same window. — Figure 10: SplitView.

Listing 9: demo/guihello/splits.c

/* Use of splitviews */

#include "splits.h"
#include <gui/guiall.h>

static const char_t *i_LOREM = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.";

/*---------------------------------------------------------------------------*/

static void i_OnDraw(View *view, Event *e)
{
    const EvDraw *p = event_params(e, EvDraw);
    real32_t p0 = p->width / 6;
    real32_t p1 = p->height / 6;
    real32_t p2 = p->width / 3;
    real32_t p3 = p->height / 3;
    unref(view);
    draw_fill_color(p->ctx, kCOLOR_RED);
    draw_rect(p->ctx, ekFILL, 0, 0, p->width, p->height);
    draw_fill_color(p->ctx, kCOLOR_GREEN);
    draw_rect(p->ctx, ekFILL, p0, p1, p->width - 2 * p0, p->height - 2 * p1);
    draw_fill_color(p->ctx, kCOLOR_BLUE);
    draw_rect(p->ctx, ekFILL, p2, p3, p->width - 2 * p2, p->height - 2 * p3);
}

/*---------------------------------------------------------------------------*/

static Panel *i_left_panel(void)
{
    uint32_t i, n = 32;
    Panel *panel = panel_scroll(FALSE, TRUE);
    Layout *layout = layout_create(2, n);
    real32_t rmargin = panel_scroll_width(panel);

    for (i = 0; i < n; ++i)
    {
        char_t text[64];
        Label *label = label_create();
        Edit *edit = edit_create();
        bstd_sprintf(text, sizeof(text), "Value %02d", i);
        label_text(label, text);
        bstd_sprintf(text, sizeof(text), "Edit here value %02d", i);
        edit_text(edit, text);
        layout_label(layout, label, 0, i);
        layout_edit(layout, edit, 1, i);
    }

    for (i = 0; i < n - 1; ++i)
        layout_vmargin(layout, i, 3);

    layout_hmargin(layout, 0, 5);
    layout_margin4(layout, 0, rmargin + 5, 0, 0);
    layout_hexpand(layout, 1);
    panel_layout(panel, layout);
    return panel;
}

/*---------------------------------------------------------------------------*/

Panel *split_panel(void)
{
    Panel *panel1 = panel_create();
    Panel *panel2 = i_left_panel();
    Layout *layout = layout_create(1, 1);
    SplitView *split1 = splitview_vertical();
    SplitView *split2 = splitview_horizontal();
    TextView *text = textview_create();
    View *view = view_create();
    textview_writef(text, i_LOREM);
    view_OnDraw(view, listener(view, i_OnDraw, View));
    splitview_pos(split1, .25f);
    splitview_size(split1, s2df(800, 480));
    splitview_size(split2, s2df(640, 480));
    splitview_view(split2, view, FALSE);
    splitview_text(split2, text, FALSE);
    splitview_panel(split1, panel2);
    splitview_split(split1, split2);
    layout_splitview(layout, split1, 0, 0);
    panel_layout(panel1, layout);
    return panel1;
}

10. Hello Modal Window!

Various modal windows. — Figure 11: Modal windows.

Listing 10: demo/guihello/modalwin.c

/* Listboxes */

#include "modalwin.h"
#include <gui/guiall.h>

typedef struct _modal_data_t ModalData;

struct _modal_data_t
{
    uint32_t type;
    Label *label;
    Window *parent;
};

/*---------------------------------------------------------------------------*/

static const char_t *i_MODAL0 = "Modal Window without [Return] nor [Esc]";
static const char_t *i_MODAL1 = "Modal Window with [Return]";
static const char_t *i_MODAL2 = "Modal Window with [Esc]";
static const char_t *i_MODAL3 = "Modal Window with [Return] and [Esc]";

/*---------------------------------------------------------------------------*/

static Layout *i_modal_layout(ModalData *data);

/*---------------------------------------------------------------------------*/

static ModalData* i_modal_data(Window* parent)
{
    ModalData *data = heap_new0(ModalData);
    data->parent = parent;
    data->type = UINT32_MAX;
    return data;
}

/*---------------------------------------------------------------------------*/

static void i_destroy_modal_data(ModalData** data)
{
    heap_delete(data, ModalData);
}

/*---------------------------------------------------------------------------*/

static void i_OnCloseModal(Window* window, Event* e)
{
    Button *button = event_sender(e, Button);
    window_stop_modal(window, button_get_tag(button));
}

/*---------------------------------------------------------------------------*/

static Layout* i_close_layout(Window *window)
{
    Layout *layout = layout_create(1, 4);
    Button *button1 = button_push();
    Button *button2 = button_push();
    Button *button3 = button_push();
    Button *button4 = button_push();
    button_text(button1, "Close modal with 10 value");
    button_text(button2, "Close modal with 20 value");
    button_text(button3, "Close modal with 30 value");
    button_text(button4, "Close modal with 40 value");
    button_tag(button1, 10);
    button_tag(button2, 20);
    button_tag(button3, 30);
    button_tag(button4, 40);
    button_OnClick(button1, listener(window, i_OnCloseModal, Window));
    button_OnClick(button2, listener(window, i_OnCloseModal, Window));
    button_OnClick(button3, listener(window, i_OnCloseModal, Window));
    button_OnClick(button4, listener(window, i_OnCloseModal, Window));
    layout_button(layout, button1, 0, 0);
    layout_button(layout, button2, 0, 1);
    layout_button(layout, button3, 0, 2);
    layout_button(layout, button4, 0, 3);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 1, 5);
    layout_vmargin(layout, 2, 5);
    return layout;
}

/*---------------------------------------------------------------------------*/

static uint32_t i_window_flags(const uint32_t type)
{
    uint32_t flags = ekWINDOW_TITLE | ekWINDOW_CLOSE;
    switch(type) {
    case 0:
        return flags;
    case 1:
        return flags | ekWINDOW_RETURN;
    case 2:
        return flags | ekWINDOW_ESC;
    case 3:
        return flags | ekWINDOW_RETURN | ekWINDOW_ESC;
    cassert_default();
    }

    return 0;
}

/*---------------------------------------------------------------------------*/

static const char_t *i_window_title(const uint32_t type)
{
    switch(type) {
    case 0:
        return i_MODAL0;
    case 1:
        return i_MODAL1;
    case 2:
        return i_MODAL2;
    case 3:
        return i_MODAL3;
    cassert_default();
    }

    return 0;
}

/*---------------------------------------------------------------------------*/

static void i_modal_window(ModalData *data)
{
    uint32_t flags = i_window_flags(data->type);
    Window *window = window_create(flags);
    ModalData *ndata = i_modal_data(window);
    Panel *panel = panel_create();
    Layout *layout1 = layout_create(2, 1);
    Layout *layout2 = i_modal_layout(ndata);
    Layout *layout3 = i_close_layout(window);
    uint32_t retval = UINT32_MAX;
    V2Df pos = window_get_origin(data->parent);
    char_t text[128];
    layout_layout(layout1, layout2, 0, 0);
    layout_layout(layout1, layout3, 1, 0);
    layout_hmargin(layout1, 0, 10);
    layout_valign(layout1, 1, 0, ekTOP);
    layout_margin(layout1, 10);
    panel_data(panel, &ndata, i_destroy_modal_data, ModalData);
    panel_layout(panel, layout1);
    window_panel(window, panel);
    window_title(window, i_window_title(data->type));
    window_origin(window, v2df(pos.x + 20, pos.y + 20));
    retval = window_modal(window, data->parent);

    if (retval == (uint32_t)ekGUI_CLOSE_ESC)
        bstd_sprintf(text, sizeof(text), "Modal stop: [Esc] (%d)", retval);
    else if (retval == (uint32_t)ekGUI_CLOSE_INTRO)
        bstd_sprintf(text, sizeof(text), "Modal stop: [Return] (%d)", retval);
    else if (retval == (uint32_t)ekGUI_CLOSE_BUTTON)
        bstd_sprintf(text, sizeof(text), "Modal stop: [X] (%d)", retval);
    else
        bstd_sprintf(text, sizeof(text), "Modal stop: %d", retval);

    label_text(data->label, text);
    window_destroy(&window);
}

/*---------------------------------------------------------------------------*/

static void i_OnClickModal(ModalData* data, Event* e)
{
    Button *button = event_sender(e, Button);
    data->type = button_get_tag(button);
    i_modal_window(data);
}

/*---------------------------------------------------------------------------*/

static Layout *i_modal_layout(ModalData *data)
{
    Layout *layout = layout_create(1, 5);
    Button *button1 = button_push();
    Button *button2 = button_push();
    Button *button3 = button_push();
    Button *button4 = button_push();
    Label *label = label_create();
    cassert(data->label == NULL);
    data->label = label;
    button_text(button1, i_MODAL0);
    button_text(button2, i_MODAL1);
    button_text(button3, i_MODAL2);
    button_text(button4, i_MODAL3);
    label_text(label, "Modal stop: --");
    button_tag(button1, 0);
    button_tag(button2, 1);
    button_tag(button3, 2);
    button_tag(button4, 3);
    button_OnClick(button1, listener(data, i_OnClickModal, ModalData));
    button_OnClick(button2, listener(data, i_OnClickModal, ModalData));
    button_OnClick(button3, listener(data, i_OnClickModal, ModalData));
    button_OnClick(button4, listener(data, i_OnClickModal, ModalData));
    layout_button(layout, button1, 0, 0);
    layout_button(layout, button2, 0, 1);
    layout_button(layout, button3, 0, 2);
    layout_button(layout, button4, 0, 3);
    layout_label(layout, label, 0, 4);
    layout_halign(layout, 0, 4, ekJUSTIFY);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 1, 5);
    layout_vmargin(layout, 2, 5);
    layout_vmargin(layout, 3, 20);
    return layout;
}

/*---------------------------------------------------------------------------*/

Panel *modal_windows(Window *parent)
{
    Panel *panel = panel_create();
    ModalData *data = i_modal_data(parent);
    Layout *layout = i_modal_layout(data);
    panel_layout(panel, layout);
    panel_data(panel, &data, i_destroy_modal_data, ModalData);
    return panel;
}

11. Hello Gui Binding!

Data binding in Windows. — Figure 12: Gui Data binding.

Listing 11: demo/guihello/guibind.c

/* GUI data binding */

#include "guibind.h"
#include <gui/guiall.h>

typedef struct _basictypes_t BasicTypes;

typedef enum _myenum_t
{
    ekRED,
    ekBLUE,
    ekGREEN,
    ekBLACK,
    ekMAGENTA,
    ekCYAN,
    ekYELLOW,
    ekWHITE
} myenum_t;

struct _basictypes_t
{
    bool_t bool_val;
    uint16_t uint16_val;
    real32_t real32_val;
    myenum_t enum_val;
    gui_state_t enum3_val;
    String* str_val;
};

#define i_NUM_CONTROLS 9

/*---------------------------------------------------------------------------*/

static void i_destroy_data(BasicTypes **data)
{
    str_destroy(&(*data)->str_val);
    heap_delete(data, BasicTypes);
}

/*---------------------------------------------------------------------------*/

static Layout *i_radio_layout(void)
{
    uint32_t i = 0, n = 6;
    Layout *layout = layout_create(1, n);
    for (i = 0; i < n; ++i)
    {
        Button *radio = button_radio();
        char_t str[64];
        bstd_sprintf(str, sizeof(str), "Radio %d", i + 1);
        button_text(radio, str);
        layout_button(layout, radio, 0, i);
    }

    return layout;
}

/*---------------------------------------------------------------------------*/

static void i_title_labels(Layout* layout)
{
    Font* font = font_system(font_regular_size(), ekFBOLD);
    const char_t* strs[] = { "Label", "EditBox", "Check", "Check3", "Radio", "PopUp", "ListBox", "Slider", "UpDown" };
    uint32_t i = 0;
    for (i = 0; i < i_NUM_CONTROLS; ++i)
    {
        Label* label = label_create();
        label_text(label, strs[i]);
        label_font(label, font);
        layout_label(layout, label, 0, i);
    }

    layout_hmargin(layout, 0, 10);
    font_destroy(&font);
}

/*---------------------------------------------------------------------------*/

static void i_value_labels(Layout* layout)
{
    uint32_t i = 0;
    for (i = 0; i < i_NUM_CONTROLS; ++i)
    {
        Label* label = label_create();
        label_align(label, ekCENTER);
        layout_label(layout, label, 2, i);
        layout_halign(layout, 2, i, ekJUSTIFY);
    }

    layout_hsize(layout, 2, 80);
    layout_hmargin(layout, 0, 10);
    for (i = 0; i < i_NUM_CONTROLS - 1; ++i)
        layout_vmargin(layout, i, 5);

    cell_dbind(layout_cell(layout, 2, 0), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 2, 1), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 2, 2), BasicTypes, bool_t, bool_val);
    cell_dbind(layout_cell(layout, 2, 3), BasicTypes, gui_state_t, enum3_val);
    cell_dbind(layout_cell(layout, 2, 4), BasicTypes, uint16_t, uint16_val);
    cell_dbind(layout_cell(layout, 2, 5), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 2, 6), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 2, 7), BasicTypes, real32_t, real32_val);
    cell_dbind(layout_cell(layout, 2, 8), BasicTypes, real32_t, real32_val);
}

/*---------------------------------------------------------------------------*/

static Layout *i_layout(void)
{
    Layout *layout = layout_create(3, 9);
    Label *label = label_create();
    Edit *edit = edit_create();
    Button *check = button_check();
    Button *check3 = button_check3();
    Layout *radios = i_radio_layout();
    PopUp *popup = popup_create();
    ListBox *listbox = listbox_create();
    Slider *slider = slider_create();
    UpDown *updown = updown_create();
    layout_label(layout, label, 1, 0);
    layout_edit(layout, edit, 1, 1);
    layout_button(layout, check, 1, 2);
    layout_button(layout, check3, 1, 3);
    layout_layout(layout, radios, 1, 4);
    layout_popup(layout, popup, 1, 5);
    layout_listbox(layout, listbox, 1, 6);
    layout_slider(layout, slider, 1, 7);
    layout_updown(layout, updown, 1, 8);
    layout_halign(layout, 1, 0, ekJUSTIFY);
    layout_halign(layout, 1, 8, ekLEFT);
    cell_dbind(layout_cell(layout, 1, 0), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 1, 1), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 1, 2), BasicTypes, bool_t, bool_val);
    cell_dbind(layout_cell(layout, 1, 3), BasicTypes, gui_state_t, enum3_val);
    cell_dbind(layout_cell(layout, 1, 4), BasicTypes, uint16_t, uint16_val);
    cell_dbind(layout_cell(layout, 1, 5), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 1, 6), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 1, 7), BasicTypes, real32_t, real32_val);
    cell_dbind(layout_cell(layout, 1, 8), BasicTypes, real32_t, real32_val);
    i_title_labels(layout);
    i_value_labels(layout);
    return layout;
}

/*---------------------------------------------------------------------------*/

Panel* guibind(void)
{
    Layout *layout = NULL;
    Panel *panel = NULL;
    BasicTypes *data = heap_new(BasicTypes);
    data->bool_val = TRUE;
    data->uint16_val = 4;
    data->real32_val = 15.5f;
    data->enum3_val = ekGUI_MIXED;
    data->enum_val = ekCYAN;
    data->str_val = str_c("Text String");

    dbind_enum(gui_state_t, ekGUI_OFF, "");
    dbind_enum(gui_state_t, ekGUI_ON, "");
    dbind_enum(gui_state_t, ekGUI_MIXED, "");
    dbind_enum(myenum_t, ekRED, "Red");
    dbind_enum(myenum_t, ekBLUE, "Blue");
    dbind_enum(myenum_t, ekGREEN, "Green");
    dbind_enum(myenum_t, ekBLACK, "Black");
    dbind_enum(myenum_t, ekMAGENTA, "Magenta");
    dbind_enum(myenum_t, ekCYAN, "Cyan");
    dbind_enum(myenum_t, ekYELLOW, "Yellow");
    dbind_enum(myenum_t, ekWHITE, "While");
    dbind(BasicTypes, bool_t, bool_val);
    dbind(BasicTypes, uint16_t, uint16_val);
    dbind(BasicTypes, real32_t, real32_val);
    dbind(BasicTypes, gui_state_t, enum3_val);
    dbind(BasicTypes, myenum_t, enum_val);
    dbind(BasicTypes, String*, str_val);
    dbind_range(BasicTypes, real32_t, real32_val, -50, 50);
    dbind_increment(BasicTypes, real32_t, real32_val, 5);

    layout = i_layout();
    panel = panel_create();
    layout_dbind(layout, NULL, BasicTypes);
    layout_dbind_obj(layout, data, BasicTypes);
    panel_data(panel, &data, i_destroy_data, BasicTypes);
    panel_layout(panel, layout);
    return panel;
}

12. Hello Struct Binding!

Struct data binding in Windows. — Figure 13: Gui Struct binding.

Listing 12: demo/guihello/layoutbind.c

/* GUI data binding */

#include "layoutbind.h"
#include <gui/guiall.h>

typedef struct _vector_t Vector;
typedef struct _structtypes_t StructTypes;

struct _vector_t
{
    real32_t x;
    real32_t y;
    real32_t z;
};

struct _structtypes_t
{
    String *name;
    Vector vec1;
    Vector vec2;
    Vector vec3;
    Vector *pvec1;
    Vector *pvec2;
    Vector *pvec3;
    real32_t length1;
    real32_t length2;
    real32_t length3;
    real32_t length4;
    real32_t length5;
    real32_t length6;
};

/*---------------------------------------------------------------------------*/

static void i_destroy_data(StructTypes **data)
{
    str_destroy(&(*data)->name);
    heap_delete(&(*data)->pvec1, Vector);
    heap_delete(&(*data)->pvec2, Vector);
    heap_delete(&(*data)->pvec3, Vector);
    heap_delete(data, StructTypes);
}

/*---------------------------------------------------------------------------*/

static Vector i_vec_init(const real32_t x, const real32_t y, const real32_t z)
{
    Vector v;
    v.x = x;
    v.y = y;
    v.z = z;
    return v;
}

/*---------------------------------------------------------------------------*/

static real32_t i_vec_length(const Vector *vec)
{
    real32_t n = vec->x * vec->x + vec->y * vec->y + vec->z * vec->z;
    return bmath_sqrtf(n);
}

/*---------------------------------------------------------------------------*/

static void i_OnDataChange(void *non_used, Event *e)
{
    StructTypes *data = evbind_object(e, StructTypes);
    Layout *layout = event_sender(e, Layout);
    unref(non_used);

    if (evbind_modify(e, StructTypes, Vector, vec1) == TRUE)
    {
        data->length1 = i_vec_length(&data->vec1);
        layout_dbind_update(layout, StructTypes, real32_t, length1);
    }
    else if (evbind_modify(e, StructTypes, Vector, vec2) == TRUE)
    {
        data->length2 = i_vec_length(&data->vec2);
        layout_dbind_update(layout, StructTypes, real32_t, length2);
    }
    else if (evbind_modify(e, StructTypes, Vector, vec3) == TRUE)
    {
        data->length3 = i_vec_length(&data->vec3);
        layout_dbind_update(layout, StructTypes, real32_t, length3);
    }
    else if (evbind_modify(e, StructTypes, Vector*, pvec1) == TRUE)
    {
        data->length4 = i_vec_length(data->pvec1);
        layout_dbind_update(layout, StructTypes, real32_t, length4);
    }
    else if (evbind_modify(e, StructTypes, Vector*, pvec2) == TRUE)
    {
        data->length5 = i_vec_length(data->pvec2);
        layout_dbind_update(layout, StructTypes, real32_t, length5);
    }
    else if (evbind_modify(e, StructTypes, Vector*, pvec3) == TRUE)
    {
        data->length6 = i_vec_length(data->pvec3);
        layout_dbind_update(layout, StructTypes, real32_t, length6);
    }
}

/*---------------------------------------------------------------------------*/

static Layout *i_vector_layout(void)
{
    Layout *layout = layout_create(3, 3);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    Edit *edit3 = edit_create();
    UpDown *updown1 = updown_create();
    UpDown *updown2 = updown_create();
    UpDown *updown3 = updown_create();
    label_text(label1, "X:");
    label_text(label2, "Y:");
    label_text(label3, "Z:");
    edit_align(edit1, ekRIGHT);
    edit_align(edit2, ekRIGHT);
    edit_align(edit3, ekRIGHT);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 2);
    layout_edit(layout, edit1, 1, 0);
    layout_edit(layout, edit2, 1, 1);
    layout_edit(layout, edit3, 1, 2);
    layout_updown(layout, updown1, 2, 0);
    layout_updown(layout, updown2, 2, 1);
    layout_updown(layout, updown3, 2, 2);
    layout_hmargin(layout, 0, 5);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 1, 5);
    layout_hsize(layout, 1, 60);
    cell_dbind(layout_cell(layout, 1, 0), Vector, real32_t, x);
    cell_dbind(layout_cell(layout, 1, 1), Vector, real32_t, y);
    cell_dbind(layout_cell(layout, 1, 2), Vector, real32_t, z);
    cell_dbind(layout_cell(layout, 2, 0), Vector, real32_t, x);
    cell_dbind(layout_cell(layout, 2, 1), Vector, real32_t, y);
    cell_dbind(layout_cell(layout, 2, 2), Vector, real32_t, z);
    layout_dbind(layout, NULL, Vector);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_name_layout(void)
{
    Layout *layout = layout_create(2, 1);
    Label *label = label_create();
    Edit *edit = edit_create();
    label_text(label, "Object Name:");
    layout_hexpand(layout, 1);
    layout_label(layout, label, 0, 0);
    layout_edit(layout, edit, 1, 0);
    layout_hmargin(layout, 0, 10);
    cell_dbind(layout_cell(layout, 1, 0), StructTypes, String*, name);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_vectors_layout(void)
{
    Layout *layout1 = layout_create(3, 4);
    Layout *layout2 = i_vector_layout();
    Layout *layout3 = i_vector_layout();
    Layout *layout4 = i_vector_layout();
    Layout *layout5 = i_vector_layout();
    Layout *layout6 = i_vector_layout();
    Layout *layout7 = i_vector_layout();
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    label_text(label1, "vec1");
    label_text(label2, "vec2");
    label_text(label3, "vec3");
    label_text(label4, "*pvec1");
    label_text(label5, "*pvec2");
    label_text(label6, "*pvec3");
    layout_label(layout1, label1, 0, 0);
    layout_label(layout1, label2, 1, 0);
    layout_label(layout1, label3, 2, 0);
    layout_label(layout1, label4, 0, 2);
    layout_label(layout1, label5, 1, 2);
    layout_label(layout1, label6, 2, 2);
    layout_layout(layout1, layout2, 0, 1);
    layout_layout(layout1, layout3, 1, 1);
    layout_layout(layout1, layout4, 2, 1);
    layout_layout(layout1, layout5, 0, 3);
    layout_layout(layout1, layout6, 1, 3);
    layout_layout(layout1, layout7, 2, 3);
    layout_halign(layout1, 0, 0, ekCENTER);
    layout_halign(layout1, 1, 0, ekCENTER);
    layout_halign(layout1, 2, 0, ekCENTER);
    layout_halign(layout1, 0, 2, ekCENTER);
    layout_halign(layout1, 1, 2, ekCENTER);
    layout_halign(layout1, 2, 2, ekCENTER);
    layout_hmargin(layout1, 0, 10);
    layout_hmargin(layout1, 1, 10);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 10);
    layout_vmargin(layout1, 2, 5);
    cell_dbind(layout_cell(layout1, 0, 1), StructTypes, Vector, vec1);
    cell_dbind(layout_cell(layout1, 1, 1), StructTypes, Vector, vec2);
    cell_dbind(layout_cell(layout1, 2, 1), StructTypes, Vector, vec3);
    cell_dbind(layout_cell(layout1, 0, 3), StructTypes, Vector*, pvec1);
    cell_dbind(layout_cell(layout1, 1, 3), StructTypes, Vector*, pvec2);
    cell_dbind(layout_cell(layout1, 2, 3), StructTypes, Vector*, pvec3);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_lengths_layout(void)
{
    Layout *layout = layout_create(2, 6);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    Label *label7 = label_create();
    Label *label8 = label_create();
    Label *label9 = label_create();
    Label *label10 = label_create();
    Label *label11 = label_create();
    Label *label12 = label_create();
    label_text(label1, "length1:");
    label_text(label2, "length2:");
    label_text(label3, "length3:");
    label_text(label4, "length4:");
    label_text(label5, "length5:");
    label_text(label6, "length6:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 2);
    layout_label(layout, label4, 0, 3);
    layout_label(layout, label5, 0, 4);
    layout_label(layout, label6, 0, 5);
    layout_label(layout, label7, 1, 0);
    layout_label(layout, label8, 1, 1);
    layout_label(layout, label9, 1, 2);
    layout_label(layout, label10, 1, 3);
    layout_label(layout, label11, 1, 4);
    layout_label(layout, label12, 1, 5);
    label_align(label7, ekRIGHT);
    label_align(label8, ekRIGHT);
    label_align(label9, ekRIGHT);
    label_align(label10, ekRIGHT);
    label_align(label11, ekRIGHT);
    label_align(label12, ekRIGHT);
    layout_hsize(layout, 1, 40);
    layout_hmargin(layout, 0, 5);
    layout_halign(layout, 1, 0, ekJUSTIFY);
    layout_halign(layout, 1, 1, ekJUSTIFY);
    layout_halign(layout, 1, 2, ekJUSTIFY);
    layout_halign(layout, 1, 3, ekJUSTIFY);
    layout_halign(layout, 1, 4, ekJUSTIFY);
    layout_halign(layout, 1, 5, ekJUSTIFY);
    cell_dbind(layout_cell(layout, 1, 0), StructTypes, real32_t, length1);
    cell_dbind(layout_cell(layout, 1, 1), StructTypes, real32_t, length2);
    cell_dbind(layout_cell(layout, 1, 2), StructTypes, real32_t, length3);
    cell_dbind(layout_cell(layout, 1, 3), StructTypes, real32_t, length4);
    cell_dbind(layout_cell(layout, 1, 4), StructTypes, real32_t, length5);
    cell_dbind(layout_cell(layout, 1, 5), StructTypes, real32_t, length6);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_layout(void)
{
    Layout *layout1 = layout_create(2, 2);
    Layout *layout2 = i_name_layout();
    Layout *layout3 = i_vectors_layout();
    Layout *layout4 = i_lengths_layout();
    layout_layout(layout1, layout2, 0, 0);
    layout_layout(layout1, layout3, 0, 1);
    layout_layout(layout1, layout4, 1, 1);
    layout_hmargin(layout1, 0, 10);
    layout_vmargin(layout1, 0, 10);
    return layout1;
}

/*---------------------------------------------------------------------------*/

Panel* layoutbind(void)
{
    Layout *layout = NULL;
    Panel *panel = NULL;
    StructTypes *data = heap_new(StructTypes);
    data->name = str_c("Generic Object");
    data->pvec1 = heap_new(Vector);
    data->pvec2 = heap_new(Vector);
    data->pvec3 = heap_new(Vector);
    data->vec1 = i_vec_init(1.2f, 2.1f, -3.4f);
    data->vec2 = i_vec_init(-0.2f, 1.8f, 2.3f);
    data->vec3 = i_vec_init(-3.2f, 4.9f, -4.7f);
    *data->pvec1 = i_vec_init(0.9f, 7.9f, -2.0f);
    *data->pvec2 = i_vec_init(-6.9f, 2.2f, 8.6f);
    *data->pvec3 = i_vec_init(3.9f, -5.5f, 0.3f);
    data->length1 = i_vec_length(&data->vec1);
    data->length2 = i_vec_length(&data->vec2);
    data->length3 = i_vec_length(&data->vec3);
    data->length4 = i_vec_length(data->pvec1);
    data->length5 = i_vec_length(data->pvec2);
    data->length6 = i_vec_length(data->pvec3);

    dbind(Vector, real32_t, x);
    dbind(Vector, real32_t, y);
    dbind(Vector, real32_t, z);
    dbind(StructTypes, String*, name);
    dbind(StructTypes, Vector, vec1);
    dbind(StructTypes, Vector, vec2);
    dbind(StructTypes, Vector, vec3);
    dbind(StructTypes, Vector*, pvec1);
    dbind(StructTypes, Vector*, pvec2);
    dbind(StructTypes, Vector*, pvec3);
    dbind(StructTypes, real32_t, length1);
    dbind(StructTypes, real32_t, length2);
    dbind(StructTypes, real32_t, length3);
    dbind(StructTypes, real32_t, length4);
    dbind(StructTypes, real32_t, length5);
    dbind(StructTypes, real32_t, length6);
    dbind_range(Vector, real32_t, x, -5, 5);
    dbind_range(Vector, real32_t, y, -5, 5);
    dbind_range(Vector, real32_t, z, -5, 5);
    dbind_increment(Vector, real32_t, x, .1f);
    dbind_increment(Vector, real32_t, y, .1f);
    dbind_increment(Vector, real32_t, z, .1f);

    layout = i_layout();
    panel = panel_create();
    layout_dbind(layout, listener(NULL, i_OnDataChange, void), StructTypes);
    layout_dbind_obj(layout, data, StructTypes);
    panel_data(panel, &data, i_destroy_data, StructTypes);
    panel_layout(panel, layout);
    return panel;
}

13. Hello Sublayout!

Interface window with several controls. — Figure 14: Sublayout composition.

Listing 13: demo/guihello/sublayout.c

/* Sublayouts */

#include "sublayout.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static Layout *i_updown_layout(void)
{
    Layout *layout = layout_create(2, 1);
    Label *label = label_create();
    UpDown *updown = updown_create();
    label_text(label, "UpDown");
    layout_label(layout, label, 0, 0);
    layout_updown(layout, updown, 1, 0);
    layout_hexpand(layout, 0);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_left_grid_layout(void)
{
    Layout *layout1 = layout_create(2, 4);
    Layout *layout2 = i_updown_layout();
    Label *label = label_create();
    Button *button1 = button_push();
    Button *button2 = button_check();
    Slider *slider = slider_create();
    PopUp *popup = popup_create();
    Edit *edit = edit_create();
    Progress *progress = progress_create();
    label_text(label, "Hello!, I'm a label.");
    button_text(button1, "Push Button");
    button_text(button2, "Check Button");
    popup_add_elem(popup, "Option 1", NULL);
    popup_add_elem(popup, "Option 2", NULL);
    popup_add_elem(popup, "Option 3", NULL);
    popup_add_elem(popup, "Option 4", NULL);
    progress_undefined(progress, TRUE);
    layout_label(layout1, label, 0, 0);
    layout_button(layout1, button1, 0, 1);
    layout_button(layout1, button2, 0, 2);
    layout_slider(layout1, slider, 0, 3);
    layout_popup(layout1, popup, 1, 0);
    layout_edit(layout1, edit, 1, 1);
    layout_layout(layout1, layout2, 1, 2);
    layout_progress(layout1, progress, 1, 3);
    layout_hsize(layout1, 0, 150);
    layout_hsize(layout1, 1, 150);
    layout_hmargin(layout1, 0, 5);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 5);
    layout_vmargin(layout1, 2, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_left_layout(void)
{
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = i_left_grid_layout();
    Button *button = button_push();
    button_text(button, "Clear");
    layout_layout(layout1, layout2, 0, 0);
    layout_button(layout1, button, 0, 1);
    layout_vmargin(layout1, 0, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_top_layout(void)
{
    Layout *layout1 = layout_create(2, 1);
    Layout *layout2 = i_left_layout();
    TextView *view = textview_create();
    layout_layout(layout1, layout2, 0, 0);
    layout_textview(layout1, view, 1, 0);
    layout_hsize(layout1, 1, 230);
    layout_hmargin(layout1, 0, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_bottom_layout(void)
{
    Layout *layout = layout_create(6, 1);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    label_text(label1, "Select 1");
    label_text(label2, "Select 2");
    label_text(label3, "Select 3");
    label_text(label4, "Select 4");
    label_text(label5, "Select 5");
    label_text(label6, "Select 6");
    label_style_over(label1, ekFUNDERLINE);
    label_style_over(label2, ekFUNDERLINE);
    label_style_over(label3, ekFUNDERLINE);
    label_style_over(label4, ekFUNDERLINE);
    label_style_over(label5, ekFUNDERLINE);
    label_style_over(label6, ekFUNDERLINE);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 1, 0);
    layout_label(layout, label3, 2, 0);
    layout_label(layout, label4, 3, 0);
    layout_label(layout, label5, 4, 0);
    layout_label(layout, label6, 5, 0);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_main_layout(void)
{
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = i_top_layout();
    Layout *layout3 = i_bottom_layout();
    layout_layout(layout1, layout2, 0, 0);
    layout_layout(layout1, layout3, 0, 1);
    layout_margin(layout1, 5);
    layout_vmargin(layout1, 0, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

Panel *sublayouts(void)
{
    Panel *panel = panel_create();
    Layout *layout = i_main_layout();
    panel_layout(panel, layout);
    return panel;
}

14. Hello Subpanel!

Listing 14: demo/guihello/subpanel.c

/* Use of subpanels */

#include "subpanel.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

Panel *subpanels(void)
{
    Panel *panel1 = panel_create();
    Panel *panel2 = panel_create();
    Layout *layout1 = layout_create(2, 2);
    Layout *layout2 = layout_create(2, 2);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Button *button = button_push();
    Slider *slider = slider_create();
    Edit *edit = edit_create();
    label_text(label1, "Main Panel");
    label_text(label2, "Subpanel");
    button_text(button, "Push Button");
    edit_text(edit, "EditBox");

    layout_label(layout2, label2, 0, 0);
    layout_button(layout2, button, 0, 1);
    layout_slider(layout2, slider, 1, 1);
    layout_hsize(layout2, 1, 150);
    layout_hmargin(layout2, 0, 10);
    layout_vmargin(layout2, 0, 10);
    layout_margin4(layout2, 5, 10, 10, 10);
    layout_skcolor(layout2, gui_line_color());
    panel_layout(panel2, layout2);

    layout_label(layout1, label1, 0, 0);
    layout_edit(layout1, edit, 1, 1);
    layout_panel(layout1, panel2, 0, 1);
    layout_hsize(layout1, 1, 100);
    layout_hmargin(layout1, 0, 10);
    layout_vmargin(layout1, 0, 10);
    layout_margin4(layout1, 5, 10, 10, 10);
    panel_layout(panel1, layout1);
    return panel1;
}

15. Hello Multi-layout!

Two different compositions for the same controls. — Figure 16: Panel with two layouts.

Listing 15: demo/guihello/multilayout.c

/* Panels with multiple layouts */

#include "multilayout.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static Panel *i_multilayout_panel(void)
{
    Panel *panel = panel_create();
    Layout *layout1 = layout_create(2, 5);
    Layout *layout2 = layout_create(1, 10);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    Edit *edit3 = edit_create();
    Edit *edit4 = edit_create();
    Edit *edit5 = edit_create();
    label_text(label1, "User Name:");
    label_text(label2, "Password:");
    label_text(label3, "Address:");
    label_text(label4, "City:");
    label_text(label5, "Phone:");
    edit_text(edit1, "Amanda Callister");
    edit_text(edit2, "aQwe56nhjJk");
    edit_text(edit3, "35, Tuam Road");
    edit_text(edit4, "Galway - Ireland");
    edit_text(edit5, "+35 654 333 000");
    edit_passmode(edit2, TRUE);

    layout_label(layout1, label1, 0, 0);
    layout_label(layout1, label2, 0, 1);
    layout_label(layout1, label3, 0, 2);
    layout_label(layout1, label4, 0, 3);
    layout_label(layout1, label5, 0, 4);
    layout_edit(layout1, edit1, 1, 0);
    layout_edit(layout1, edit2, 1, 1);
    layout_edit(layout1, edit3, 1, 2);
    layout_edit(layout1, edit4, 1, 3);
    layout_edit(layout1, edit5, 1, 4);
    layout_hsize(layout1, 1, 300);
    layout_hmargin(layout1, 0, 5);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 5);
    layout_vmargin(layout1, 2, 5);
    layout_vmargin(layout1, 3, 5);

    layout_label(layout2, label1, 0, 0);
    layout_label(layout2, label2, 0, 2);
    layout_label(layout2, label3, 0, 4);
    layout_label(layout2, label4, 0, 6);
    layout_label(layout2, label5, 0, 8);
    layout_edit(layout2, edit1, 0, 1);
    layout_edit(layout2, edit2, 0, 3);
    layout_edit(layout2, edit3, 0, 5);
    layout_edit(layout2, edit4, 0, 7);
    layout_edit(layout2, edit5, 0, 9);
    layout_hsize(layout2, 0, 200);
    layout_vmargin(layout2, 1, 5);
    layout_vmargin(layout2, 3, 5);
    layout_vmargin(layout2, 5, 5);
    layout_vmargin(layout2, 7, 5);

    panel_layout(panel, layout1);
    panel_layout(panel, layout2);
    return panel;
}

/*---------------------------------------------------------------------------*/

static void i_OnLayout(Panel *panel, Event *e)
{
    const EvButton *params = event_params(e, EvButton);
    panel_visible_layout(panel, params->index);
    panel_update(panel);
}

/*---------------------------------------------------------------------------*/

Panel *multilayouts(void)
{
    Panel *panel1 = panel_create();
    Panel *panel2 = i_multilayout_panel();
    Button *button1 = button_radio();
    Button *button2 = button_radio();
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = layout_create(2, 1);
    button_text(button1, "Layout1");
    button_text(button2, "Layout2");
    button_state(button1, ekGUI_ON);
    button_OnClick(button1, listener(panel2, i_OnLayout, Panel));
    layout_button(layout2, button1, 0, 0);
    layout_button(layout2, button2, 1, 0);
    layout_layout(layout1, layout2, 0, 0);
    layout_panel(layout1, panel2, 0, 1);
    layout_vmargin(layout1, 0, 10);
    layout_hmargin(layout2, 0, 10);
    layout_halign(layout1, 0, 0, ekLEFT);
    panel_layout(panel1, layout1);
    return panel1;
}

16. Hello Scroll-Panel!

Panel with a very large area and scroll bars. — Figure 17: Panel with scroll bars.

Listing 16: demo/guihello/scrollpanel.c

/* Panel with scroll */

#include "scrollpanel.h"
#include <gui/guiall.h>

static const uint32_t i_ROWS = 100;

/*---------------------------------------------------------------------------*/

Panel *scrollpanel(void)
{
    Panel *panel = panel_scroll(FALSE, TRUE);
    Layout *layout = layout_create(3, i_ROWS);
    real32_t margin = panel_scroll_width(panel);
    uint32_t i = 0;
    panel_size(panel, s2df(-1, 400));
    for (i = 0; i < i_ROWS; ++i)
    {
        char_t text[128];
        Label *label = label_create();
        Edit *edit = edit_create();
        Button *button = button_push();
        bstd_sprintf(text, sizeof(text), "User %d", i + 1);
        label_text(label, text);
        bstd_sprintf(text, sizeof(text), "Name of User %d", i + 1);
        edit_text(edit, text);
        bstd_sprintf(text, sizeof(text), "Edit %d", i + 1);
        button_text(button, text);
        layout_label(layout, label, 0, i);
        layout_edit(layout, edit, 1, i);
        layout_button(layout, button, 2, i);
    }

    for (i = 0; i < i_ROWS - 1; ++i)
        layout_vmargin(layout, i, 5);

    layout_hmargin(layout, 0, 10);
    layout_hmargin(layout, 1, 10);
    layout_hsize(layout, 1, 150);
    layout_margin4(layout, 0, margin, 0, 0);
    panel_layout(panel, layout);
    return panel;
}

17. Hello IP-Input!

Window to enter an IP address. — Figure 18: The Edit commands automatically change the keyboard focus after inserting the third character.

Listing 17: demo/guihello/ipinput.c

/* IP input */

#include "ipinput.h"
#include <gui/guiall.h>

/*---------------------------------------------------------------------------*/

static void i_OnEditFilter(Window *window, Event* e)
{
    const EvText *p = event_params(e, EvText);
    EvTextFilter *filter = event_result(e, EvTextFilter);
    uint32_t i, j = 0, n = str_len_c(p->text);

    /* We only accept numbers in IP controls */
    for(i = 0; i < n; ++i)
    {
        if (p->text[i] >= '0' && p->text[i] <= '9')
            filter->text[j++] = p->text[i];
    }

    if (j > 3)
        j = 3;

    filter->text[j] = '\0';
    filter->apply = TRUE;

    /* We wrote the third character --> Jump to next control */
    if (j == 3)
        window_next_tabstop(window);
}

/*---------------------------------------------------------------------------*/

Panel *ip_input(Window *window)
{
    Panel *panel = panel_create();
    Layout *layout1 = layout_create(7, 1);
    Layout *layout2 = layout_create(1, 3);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    Edit *edit3 = edit_create();
    Edit *edit4 = edit_create();
    Button *button1 = button_push();
    Button *button2 = button_push();
    label_text(label1, ".");
    label_text(label2, ".");
    label_text(label3, ".");
    button_text(button1, "Connect");
    button_text(button2, "Exit");
    edit_OnFilter(edit1, listener(window, i_OnEditFilter, Window));
    edit_OnFilter(edit2, listener(window, i_OnEditFilter, Window));
    edit_OnFilter(edit3, listener(window, i_OnEditFilter, Window));
    edit_OnFilter(edit4, listener(window, i_OnEditFilter, Window));
    layout_label(layout1, label1, 1, 0);
    layout_label(layout1, label2, 3, 0);
    layout_label(layout1, label3, 5, 0);
    layout_edit(layout1, edit1, 0, 0);
    layout_edit(layout1, edit2, 2, 0);
    layout_edit(layout1, edit3, 4, 0);
    layout_edit(layout1, edit4, 6, 0);
    layout_layout(layout2, layout1, 0, 0);
    layout_button(layout2, button1, 0, 1);
    layout_button(layout2, button2, 0, 2);
    layout_vmargin(layout2, 0, 5.f);
    layout_vmargin(layout2, 1, 5.f);
    layout_hsize(layout2, 0, 200.f);
    panel_layout(panel, layout2);
    return panel;
}