UpDown

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Functions

UpDown are two-part horizontally divided button controls (Figure 1). Each part has a small arrow printed and is normally used to make discrete increases in numerical values associated with controls Edit.

• Use updown_create to create an updown button.
• Use updown_OnClick to respond to keystrokes.

updown_create ()

Create an updown control.

UpDown*
updown_create(void);

Return

The updown.

updown_OnClick ()

Set an event handler for pressing the button.

void
updown_OnClick(UpDown *updown,
               Listener *listener);

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static void i_OnClick(App *app, Event *e)
{
    const EvButton *p = event_params(e, EvButton);
    if (p->index == 0)
        do_something_onup(app);
    else
        do_something_ondown(app);
}
...
updown_OnClick(updown, listener(app, i_OnClick, App));

Remarks

See GUI Events.

updown_tooltip ()

Set a tooltip for the button. It is a small explanatory text that will appear when the mouse is over the control.

void
updown_tooltip(UpDown *updown,
               const char_t *text);