static void _rtgui_listctrl_scrollbar_onmouse(struct rtgui_listctrl* ctrl, struct rtgui_event_mouse* mouse)
{
rtgui_rect_t rect;
rt_uint32_t height, y1;
rt_uint16_t old_item;
/* get scrollbar rect */
_rtgui_listctrl_get_scrollbar_rect(ctrl, &rect);
height = rtgui_rect_height(rect);
height = height / ((ctrl->items_count + (ctrl->page_items - 1))/ctrl->page_items);
y1 = (ctrl->current_item / ctrl->page_items) * height;
rect.y1 = rect.y1 + y1; rect.y2 = rect.y1 + height;
rtgui_widget_rect_to_device(RTGUI_WIDGET(ctrl), &rect);
old_item = ctrl->current_item;
if (mouse->y < rect.y1)
{
if (ctrl->current_item - ctrl->page_items >= 0)
ctrl->current_item -= ctrl->page_items;
rtgui_listctrl_update_current(ctrl, old_item);
}
else if (mouse->y > rect.y2)
{
if (ctrl->current_item + ctrl->page_items < ctrl->items_count - 1)
ctrl->current_item += ctrl->page_items;
else
ctrl->current_item = ((ctrl->current_item / ctrl->page_items) + 1) * ctrl->page_items;
rtgui_listctrl_update_current(ctrl, old_item);
}
}
static void _rtgui_listctrl_scrollbar_ondraw(struct rtgui_listctrl* ctrl, struct rtgui_dc* dc)
{
rtgui_rect_t rect;
rt_uint32_t height, y1;
/* get scrollbar rect */
_rtgui_listctrl_get_scrollbar_rect(ctrl, &rect);
rtgui_dc_fill_rect(dc, &rect);
height = rtgui_rect_height(rect);
height = height / ((ctrl->items_count + (ctrl->page_items - 1))/ctrl->page_items);
y1 = (ctrl->current_item / ctrl->page_items) * height;
rect.y1 = rect.y1 + y1; rect.y2 = rect.y1 + height;
rtgui_theme_draw_selected(dc, &rect);
}
rt_bool_t rtgui_listctrl_event_handler(struct rtgui_widget* widget, struct rtgui_event* event)
{
struct rtgui_listctrl* ctrl = RT_NULL;
ctrl = RTGUI_LISTCTRL(widget);
switch (event->type)
{
case RTGUI_EVENT_PAINT:
_rtgui_listctrl_ondraw(ctrl);
return RT_FALSE;
case RTGUI_EVENT_RESIZE:
{
struct rtgui_event_resize* resize;
resize = (struct rtgui_event_resize*)event;
/* recalculate page items */
ctrl->page_items = resize->h / (2 + rtgui_theme_get_selected_height());
}
break;
case RTGUI_EVENT_MOUSE_BUTTON:
{
rtgui_rect_t rect;
struct rtgui_event_mouse* emouse;
emouse = (struct rtgui_event_mouse*)event;
/* get scrollbar rect */
_rtgui_listctrl_get_scrollbar_rect(ctrl, &rect);
rtgui_widget_rect_to_device(RTGUI_WIDGET(ctrl), &rect);
if (rtgui_rect_contains_point(&rect, emouse->x, emouse->y) == RT_EOK)
{
_rtgui_listctrl_scrollbar_onmouse(ctrl, emouse);
return RT_TRUE;
}
/* calculate selected item */
/* get physical extent information */
_rtgui_listctrl_get_rect(ctrl, &rect);
rtgui_widget_rect_to_device(widget, &rect);
if ((rtgui_rect_contains_point(&rect, emouse->x, emouse->y) == RT_EOK) &&
(ctrl->items_count > 0))
{
rt_uint16_t index;
index = (emouse->y - rect.y1) / (2 + rtgui_theme_get_selected_height());
/* set focus */
rtgui_widget_focus(widget);
{
struct rtgui_rect rect;
struct rtgui_dc* dc;
dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(ctrl));
if (dc != RT_NULL)
{
/* get widget rect */
rtgui_widget_get_rect(RTGUI_WIDGET(ctrl), &rect);
/* update focus border */
rect.x2 -= 1; rect.y2 -= 1;
rtgui_dc_end_drawing(dc);
}
}
if ((index < ctrl->page_items) &&
(ctrl->current_item/ctrl->page_items)* ctrl->page_items + index < ctrl->items_count)
{
rt_uint16_t old_item;
old_item = ctrl->current_item;
/* set selected item */
ctrl->current_item = (ctrl->current_item/ctrl->page_items) * ctrl->page_items + index;
if (emouse->button & RTGUI_MOUSE_BUTTON_DOWN)
{
/* down event */
rtgui_listctrl_update_current(ctrl, old_item);
}
else
{
/* up event */
if (ctrl->on_item != RT_NULL)
{
ctrl->on_item(RTGUI_WIDGET(ctrl), RT_NULL);
}
}
}
}
return RT_TRUE;
}
case RTGUI_EVENT_KBD:
{
struct rtgui_event_kbd* ekbd = (struct rtgui_event_kbd*)event;
if ((ekbd->type == RTGUI_KEYDOWN) && (ctrl->items_count > 0))
{
rt_uint16_t old_item;
old_item = ctrl->current_item;
switch (ekbd->key)
{
case RTGUIK_LEFT:
if (ctrl->current_item - ctrl->page_items >= 0)
ctrl->current_item -= ctrl->page_items;
rtgui_listctrl_update_current(ctrl, old_item);
return RT_FALSE;
case RTGUIK_UP:
if (ctrl->current_item > 0)
ctrl->current_item --;
rtgui_listctrl_update_current(ctrl, old_item);
return RT_FALSE;
case RTGUIK_RIGHT:
if (ctrl->current_item + ctrl->page_items < ctrl->items_count - 1)
ctrl->current_item += ctrl->page_items;
else
{
if ((((ctrl->current_item/ctrl->page_items) + 1) * ctrl->page_items) < ctrl->items_count - 1)
ctrl->current_item = ((ctrl->current_item / ctrl->page_items) + 1) * ctrl->page_items;
}
rtgui_listctrl_update_current(ctrl, old_item);
return RT_FALSE;
case RTGUIK_DOWN:
if (ctrl->current_item < ctrl->items_count - 1)
ctrl->current_item ++;
rtgui_listctrl_update_current(ctrl, old_item);
return RT_FALSE;
case RTGUIK_RETURN:
if (ctrl->on_item != RT_NULL)
{
ctrl->on_item(RTGUI_WIDGET(ctrl), RT_NULL);
}
return RT_FALSE;
default:
break;
}
}
}
return RT_FALSE;
}
/* use ctrl event handler */
return rtgui_widget_event_handler(widget, event);
}
