rt-thread-official/rtgui/widgets/slider.c

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#include <rtgui/dc.h>
#include <rtgui/rtgui_theme.h>
#include <rtgui/widgets/slider.h>
#define RTGUI_SLIDER_DEFAULT_WIDTH 100
#define RTGUI_SLIDER_DEFAULT_HEIGHT 20
#define RTGUI_SLIDER_DEFAULT_MIN 0
#define RTGUI_SLIDER_DEFAULT_MAX 100
static void _rtgui_slider_constructor(rtgui_slider_t *slider)
{
rtgui_rect_t rect = {0, 0, RTGUI_SLIDER_DEFAULT_WIDTH, RTGUI_SLIDER_DEFAULT_HEIGHT};
/* init widget and set event handler */
RTGUI_WIDGET(slider)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE;
rtgui_widget_set_rect(RTGUI_WIDGET(slider), &rect);
rtgui_widget_set_event_handler(RTGUI_WIDGET(slider), rtgui_slider_event_handler);
/* set proper of control */
slider->min = RTGUI_SLIDER_DEFAULT_MIN;
slider->max = RTGUI_SLIDER_DEFAULT_MAX;
slider->value = RTGUI_SLIDER_DEFAULT_MIN;
slider->orient = RTGUI_HORIZONTAL;
slider->ticks = 10;
slider->thumb_width = 8;
}
rtgui_type_t *rtgui_slider_type_get(void)
{
static rtgui_type_t *slider_type = RT_NULL;
if (!slider_type)
{
slider_type = rtgui_type_create("slider", RTGUI_WIDGET_TYPE,
sizeof(rtgui_slider_t), RTGUI_CONSTRUCTOR(_rtgui_slider_constructor), RT_NULL);
}
return slider_type;
}
static void rtgui_slider_onmouse(struct rtgui_slider* slider, struct rtgui_event_mouse* event)
{
RT_ASSERT(slider != RT_NULL);
RT_ASSERT(event != RT_NULL);
if (event->button & RTGUI_MOUSE_BUTTON_DOWN &&
event->button & RTGUI_MOUSE_BUTTON_LEFT)
{
int sel;
int range = slider->max - slider->min;
int x0, xsize;
int x;
x0 = 1 + slider->thumb_width/2;
if (slider->orient == RTGUI_VERTICAL)
{
x = event->y - RTGUI_WIDGET(slider)->extent.y1;
x -= x0;
xsize = rtgui_rect_height(RTGUI_WIDGET(slider)->extent) - 2 * x0;
}
else
{
x = event->x - RTGUI_WIDGET(slider)->extent.x1;
x -= x0;
xsize = rtgui_rect_width(RTGUI_WIDGET(slider)->extent) - 2 * x0;
}
if (x <= 0)
{
sel = slider->min;
}
else if (x >= xsize)
{
sel = slider->max;
}
else
{
sel = ((range * x) + xsize/2) / xsize;
sel += slider->min;
}
rtgui_widget_focus(RTGUI_WIDGET(slider));
rtgui_slider_set_value(slider, sel);
}
}
static void rtgui_slider_onkey(struct rtgui_slider* slider, struct rtgui_event_kbd *event)
{
RT_ASSERT(slider != RT_NULL);
RT_ASSERT(event != RT_NULL);
if (!(RTGUI_KBD_IS_UP(event))) return;
if (event->key == RTGUIK_LEFT)
{
if (slider->value > slider->min)
slider->value ++;
}
if (event->key == RTGUIK_RIGHT)
{
if (slider->value < slider->max)
slider->value --;
}
/* update widget */
rtgui_widget_update(RTGUI_WIDGET(slider));
}
rt_bool_t rtgui_slider_event_handler(struct rtgui_widget* widget, struct rtgui_event* event)
{
struct rtgui_slider* slider = (struct rtgui_slider*)widget;
switch (event->type)
{
case RTGUI_EVENT_PAINT:
#ifndef RTGUI_USING_SMALL_SIZE
if (widget->on_draw != RT_NULL) widget->on_draw(widget, event);
else
#endif
{
rtgui_theme_draw_slider(slider);
}
break;
case RTGUI_EVENT_KBD:
#ifndef RTGUI_USING_SMALL_SIZE
if (widget->on_key != RT_NULL) widget->on_key(widget, event);
else
#endif
{
rtgui_slider_onkey(slider, (struct rtgui_event_kbd *)event);
}
break;
case RTGUI_EVENT_MOUSE_BUTTON:
#ifndef RTGUI_USING_SMALL_SIZE
if (widget->on_mouseclick != RT_NULL) widget->on_mouseclick(widget, event);
else
#endif
{
rtgui_slider_onmouse(slider, (struct rtgui_event_mouse*)event);
}
break;
}
return RT_FALSE;
}
struct rtgui_slider* rtgui_slider_create(rt_size_t min, rt_size_t max, int orient)
{
struct rtgui_slider* slider;
slider = (struct rtgui_slider*) rtgui_widget_create (RTGUI_SLIDER_TYPE);
if (slider != RT_NULL)
{
/* set proper of control */
slider->min = min;
slider->max = max;
slider->value = min;
slider->ticks = 10;
slider->thumb_width = 8;
rtgui_slider_set_orientation(slider, orient);
}
return slider;
}
void rtgui_slider_set_range(struct rtgui_slider* slider, rt_size_t min, rt_size_t max)
{
RT_ASSERT(slider != RT_NULL);
slider->max = max;
slider->min = min;
}
void rtgui_slider_set_value(struct rtgui_slider* slider, rt_size_t value)
{
RT_ASSERT(slider != RT_NULL);
if (value < slider->min) value = slider->min;
if (value > slider->max) value = slider->max;
if (slider->value != value)
{
slider->value = value;
rtgui_theme_draw_slider(slider);
}
}
void rtgui_slider_set_orientation(struct rtgui_slider* slider, int orientation)
{
RT_ASSERT(slider != RT_NULL);
/* set orientation */
slider->orient = orientation;
#ifndef RTGUI_USING_SMALL_SIZE
if (slider->orient == RTGUI_HORIZONTAL)
{
/* HORIZONTAL */
rtgui_widget_set_miniheight(RTGUI_WIDGET(slider), RTGUI_SLIDER_DEFAULT_HEIGHT);
rtgui_widget_set_miniwidth(RTGUI_WIDGET(slider), RTGUI_SLIDER_DEFAULT_WIDTH);
}
else
{
/* VERTICAL */
rtgui_widget_set_miniwidth(RTGUI_WIDGET(slider), RTGUI_SLIDER_DEFAULT_HEIGHT);
rtgui_widget_set_miniheight(RTGUI_WIDGET(slider), RTGUI_SLIDER_DEFAULT_WIDTH);
}
#endif
}
rt_size_t rtgui_slider_get_value(struct rtgui_slider* slider)
{
RT_ASSERT(slider != RT_NULL);
return slider->value;
}