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+#include <rtgui/dc.h>
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+#include <rtgui/widgets/combobox.h>
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+
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+static rt_bool_t rtgui_combobox_pulldown_hide(struct rtgui_widget* widget, struct rtgui_event* event);
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+
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+static void _rtgui_combobox_constructor(rtgui_combobox_t *box)
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+{
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+ rtgui_rect_t rect = {0, 0, RTGUI_COMBOBOX_WIDTH, RTGUI_COMBOBOX_HEIGHT};
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+
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+ /* init widget and set event handler */
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+ rtgui_widget_set_event_handler(RTGUI_WIDGET(box), rtgui_combobox_event_handler);
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+ rtgui_widget_set_rect(RTGUI_WIDGET(box), &rect);
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+
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+ RTGUI_WIDGET_TEXTALIGN(RTGUI_WIDGET(box)) = RTGUI_ALIGN_CENTER_VERTICAL;
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+
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+ box->pd_pressed = RT_FALSE;
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+ box->current_item = 0;
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+ box->on_selected = RT_NULL;
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+
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+ box->pd_win = rtgui_win_create(RT_NULL, "combo", &rect, RTGUI_WIN_STYLE_NO_TITLE);
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+ box->pd_win->user_data = (rt_uint32_t)box;
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+ rtgui_win_set_ondeactivate(RTGUI_WIN(box->pd_win), rtgui_combobox_pulldown_hide);
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+}
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+
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+static void _rtgui_combobox_destructor(rtgui_combobox_t *box)
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+{
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+ /* destroy pull down window */
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+ rtgui_win_destroy(box->pd_win);
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+
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+ /* reset box field */
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+ box->pd_win = RT_NULL;
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+}
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+
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+rtgui_type_t *rtgui_combobox_type_get(void)
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+{
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+ static rtgui_type_t *combobox_type = RT_NULL;
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+
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+ if (!combobox_type)
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+ {
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+ combobox_type = rtgui_type_create("combobox", RTGUI_WIDGET_TYPE,
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+ sizeof(rtgui_combobox_t),
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+ RTGUI_CONSTRUCTOR(_rtgui_combobox_constructor),
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+ RTGUI_DESTRUCTOR(_rtgui_combobox_destructor));
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+ }
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+
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+ return combobox_type;
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+}
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+
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+rtgui_combobox_t *rtgui_combobox_create()
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+{
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+ rtgui_combobox_t* box;
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+
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+ box = (rtgui_combobox_t*)rtgui_widget_create(RTGUI_COMBOBOX_TYPE);
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+
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+ return box;
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+}
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+
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+void rtgui_combobox_destroy(rtgui_combobox_t* box)
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+{
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+ rtgui_widget_destroy(RTGUI_WIDGET(box));
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+}
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+
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+static void rtgui_combobox_ondraw(struct rtgui_combobox* box)
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+{
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+ /* draw button */
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+ struct rtgui_dc* dc;
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+ struct rtgui_rect rect;
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+
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+ /* begin drawing */
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+ dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(box));
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+ if (dc == RT_NULL) return;
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+
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+ /* get widget rect */
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+ rtgui_widget_get_rect(RTGUI_WIDGET(box), &rect);
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+ /* fill widget rect with background color */
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+ rtgui_dc_fill_rect(dc, &rect);
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+ rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_RAISE);
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+
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+ /* draw current item */
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+ if (box->current_item < box->items_count)
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+ {
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+ rect.x1 += 5;
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+ rtgui_dc_draw_text(dc, box->items[box->current_item].name, &rect);
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+ }
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+
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+ /* draw pull down button */
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+ rect.x1 = rect.x2 - RTGUI_COMBOBOX_BUTTON_WIDTH;
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+ rtgui_rect_inflate(&rect, -1);
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+ if (box->pd_pressed == RT_TRUE) rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_SUNKEN);
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+ else rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_RAISE);
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+ rtgui_dc_draw_arraw(dc, &rect, RTGUI_ARRAW_DOWN);
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+
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+ /* end drawing */
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+ rtgui_dc_end_drawing(dc);
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+ return;
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+}
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+
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+static rt_bool_t rtgui_combobox_onmouse_button(struct rtgui_combobox* box, struct rtgui_event_mouse* event)
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+{
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+ struct rtgui_rect rect;
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+
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+ /* get widget rect */
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+ rect = RTGUI_WIDGET(box)->extent;
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+
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+ /* move to the pull down button */
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+ rect.x1 = rect.x2 - RTGUI_COMBOBOX_BUTTON_WIDTH;
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+ if (rtgui_rect_contains_point(&rect, event->x, event->y) == RT_EOK)
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+ {
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+ /* handle mouse button on pull down button */
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+ if (event->button & RTGUI_MOUSE_BUTTON_LEFT &&
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+ event->button & RTGUI_MOUSE_BUTTON_DOWN)
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+ {
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+ box->pd_pressed = RT_TRUE;
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+ rtgui_widget_update(RTGUI_WIDGET(box));
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+ }
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+ else if (event->button & RTGUI_MOUSE_BUTTON_LEFT &&
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+ event->button & RTGUI_MOUSE_BUTTON_UP)
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+ {
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+ box->pd_pressed = RT_FALSE;
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+ rtgui_widget_update(RTGUI_WIDGET(box));
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+
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+ /* pop pull down window */
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+ if (box->pd_win != RT_NULL)
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+ {
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+ struct rtgui_rect r;
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+ rtgui_box_t* pd_win_box;
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+
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+ r.x1 = RTGUI_WIDGET(box)->extent.x1;
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+ r.y1 = RTGUI_WIDGET(box)->extent.y2 + 2;
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+ r.x2 = RTGUI_WIDGET(box)->extent.x2;
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+ r.y2 = r.y1 + box->pd_win_height;
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+
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+ rtgui_win_set_rect(RTGUI_WIN(box->pd_win), &r);
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+ pd_win_box = (rtgui_box_t*) rtgui_container_get_first_child(RTGUI_CONTAINER(box->pd_win));
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+ if (pd_win_box != RT_NULL)
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+ {
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+ RTGUI_WIDGET(pd_win_box)->extent = RTGUI_WIDGET(box->pd_win)->extent;
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+ rtgui_box_layout(pd_win_box);
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+ }
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+
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+ /* show combo box pull down window */
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+ rtgui_win_show(RTGUI_WIN(box->pd_win), RT_FALSE);
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+ }
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+ }
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+
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+ return RT_TRUE;
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+ }
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+
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+ return RT_FALSE;
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+}
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+
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+rt_bool_t rtgui_combobox_event_handler(struct rtgui_widget* widget, struct rtgui_event* event)
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+{
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+ struct rtgui_combobox* box = (struct rtgui_combobox*)widget;
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+
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+ switch (event->type)
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+ {
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+ case RTGUI_EVENT_PAINT:
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+#ifndef RTGUI_USING_SMALL_SIZE
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+ if (widget->on_draw != RT_NULL) widget->on_draw(widget, event);
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+ else
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+#endif
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+ rtgui_combobox_ondraw(box);
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+
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+ break;
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+
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+ case RTGUI_EVENT_MOUSE_BUTTON:
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+ return rtgui_combobox_onmouse_button(box, (struct rtgui_event_mouse*)event);
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+
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+ case RTGUI_EVENT_FOCUSED:
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+ {
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+ /* item focused */
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+ struct rtgui_item* item;
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+ struct rtgui_event_focused* focused;
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+
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+ focused = (struct rtgui_event_focused*) event;
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+
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+ item = (struct rtgui_item*) (focused->widget);
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+ if (item != RT_NULL)
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+ {
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+ if (box->pd_select != RT_NULL)
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+ {
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+ /* un-select old item */
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+ rtgui_item_selected(box->pd_select, RT_FALSE);
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+ }
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+
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+ box->pd_select = item;
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+ if (box->on_selected != RT_NULL)
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+ {
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+ box->on_selected(RTGUI_WIDGET(box), RT_NULL);
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+ }
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+
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+ /* hide pull down window */
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+ rtgui_win_hiden(RTGUI_WIN(box->pd_win));
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+ rtgui_combobox_ondraw(box);
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+ }
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+ }
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+ break;
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+ }
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+
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+ return RT_FALSE;
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+}
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+
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+static rt_bool_t rtgui_combobox_pulldown_hide(struct rtgui_widget* widget, struct rtgui_event* event)
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+{
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+ struct rtgui_combobox* box;
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+
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+ if (widget == RT_NULL) return RT_TRUE;
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+
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+ box = (struct rtgui_combobox*) (((struct rtgui_win*)widget)->user_data);
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+ if (box == RT_NULL) return RT_TRUE;
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+
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+ /* clear select item */
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+ if (box->pd_select != RT_NULL)
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+ {
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+ rtgui_item_selected(box->pd_select, RT_FALSE);
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+ }
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+
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+ /* hide pull down window */
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+ rtgui_win_hiden(RTGUI_WIN(box->pd_win));
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+
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+ /* clear pull down button state */
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+ box->pd_pressed = RT_FALSE;
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+ rtgui_widget_update(RTGUI_WIDGET(box));
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+
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+ return RT_TRUE;
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+}
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+
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+struct rtgui_item* rtgui_combox_get_select(struct rtgui_combobox* box)
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+{
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+ if ((box != RT_NULL) && (box->current_item < box->items_count))
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+ {
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+ return &(box->items[box->current_item]);
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+ }
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+
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+ return RT_NULL;
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+}
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bernard.xiong@gmail.com