Slider

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Functions

Sliders are normally used to edit continuous and bounded numerical values (Figure 1). As the control moves, OnMoved events occur that return a value between 0 and 1. In Hello Slider and Progress! you have an example of use.

• Use slider_create to create a horizontal slider.
• Use slider_vertical to create a vertical slider.
• Use slider_OnMoved to respond to scrolling.

slider_create ()

Create a new slider control.

Slider*
slider_create(void);

Return

Slider.

slider_vertical ()

Create a new vertical slider.

Slider*
slider_vertical(void);

Return

Slider.

slider_OnMoved ()

Set an event handler for slider movement.

void
slider_OnMoved(Slider *slider,
               Listener *listener);

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static void i_OnMoved(App *app, Event *e)
{
    const EvSlider *p = event_params(e, EvSlider);
    do_something_onmoved(app, p->pos);
}
...
slider_OnMoved(slider, listener(app, i_OnMoved, App));

Remarks

EvSlider contains the event parameters, see GUI Events.

slider_tooltip ()

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

void
slider_tooltip(Slider *slider,
               const char_t *text);

slider_steps ()

Changes the slider from continuous range to discrete intervals.

void
slider_steps(Slider *slider,
             const uint32_t steps);

slider_value ()

Set the slider position.

void
slider_value(Slider *slider,
             const real32_t value);

slider_get_value ()

Get the slider position.

real32_t
slider_get_value(const Slider *slider);

Return

The normalized position between 0.0 and 1.0.