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/*
* File : container.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2009-10-16 Bernard first version
*/
#include <rtgui/widgets/toplevel.h>
#include <rtgui/widgets/container.h>
static void _rtgui_container_constructor(rtgui_container_t *container)
{
/* set event handler and init field */
rtgui_widget_set_event_handler(RTGUI_WIDGET(container), rtgui_container_event_handler);
rtgui_list_init(&(container->children));
/* set focused widget to itself */
container->focused = RTGUI_WIDGET(container);
/* set container as focusable widget */
RTGUI_WIDGET(container)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE;
}
static void _rtgui_container_destructor(rtgui_container_t *container)
{
/* destroy children of container */
rtgui_container_destroy_children(container);
}
static void _rtgui_container_update_toplevel(rtgui_container_t* container)
{
struct rtgui_list_node* node;
rtgui_list_foreach(node, &(container->children))
{
rtgui_widget_t* child = rtgui_list_entry(node, rtgui_widget_t, sibling);
/* set child toplevel */
child->toplevel = rtgui_widget_get_toplevel(RTGUI_WIDGET(container));
if (RTGUI_IS_CONTAINER(child))
{
_rtgui_container_update_toplevel(RTGUI_CONTAINER(child));
}
}
}
DEFINE_CLASS_TYPE(container, "container",
RTGUI_WIDGET_TYPE,
_rtgui_container_constructor,
_rtgui_container_destructor,
sizeof(struct rtgui_container));
rt_bool_t rtgui_container_dispatch_event(rtgui_container_t *container, rtgui_event_t* event)
{
/* handle in child widget */
struct rtgui_list_node* node;
rtgui_list_foreach(node, &(container->children))
{
struct rtgui_widget* w;
w = rtgui_list_entry(node, struct rtgui_widget, sibling);
if (w->event_handler(w, event) == RT_TRUE) return RT_TRUE;
}
return RT_FALSE;
}
rt_bool_t rtgui_container_dispatch_mouse_event(rtgui_container_t *container, struct rtgui_event_mouse* event)
{
/* handle in child widget */
struct rtgui_list_node* node;
rtgui_widget_t *focus;
/* get focus widget on toplevel */
focus = RTGUI_CONTAINER(RTGUI_WIDGET(container)->toplevel)->focused;
rtgui_list_foreach(node, &(container->children))
{
struct rtgui_widget* w;
w = rtgui_list_entry(node, struct rtgui_widget, sibling);
if (rtgui_rect_contains_point(&(w->extent), event->x, event->y) == RT_EOK)
{
if ((focus != w) && RTGUI_WIDGET_IS_FOCUSABLE(w))
rtgui_widget_focus(w);
if (w->event_handler(w, (rtgui_event_t*)event) == RT_TRUE) return RT_TRUE;
}
}
return RT_FALSE;
}
rt_bool_t rtgui_container_event_handler(rtgui_widget_t* widget, rtgui_event_t* event)
{
rtgui_container_t *container = RTGUI_CONTAINER(widget);
switch (event->type)
{
case RTGUI_EVENT_PAINT:
case RTGUI_EVENT_COMMAND:
case RTGUI_EVENT_RESIZE:
rtgui_container_dispatch_event(container, event);
break;
case RTGUI_EVENT_KBD:
{
/* let parent to handle keyboard event */
if (widget->parent != RT_NULL && widget->parent != widget->toplevel)
{
return widget->parent->event_handler(widget->parent, event);
}
}
break;
case RTGUI_EVENT_MOUSE_BUTTON:
/* handle in child widget */
return rtgui_container_dispatch_mouse_event(container,
(struct rtgui_event_mouse*)event);
case RTGUI_EVENT_MOUSE_MOTION:
return rtgui_container_dispatch_mouse_event(container,
(struct rtgui_event_mouse*)event);
default:
/* call parent widget event handler */
return rtgui_widget_event_handler(widget, event);
}
return RT_FALSE;
}
/*
* This function will add a child to a container widget
* Note: this function will not change the widget layout
* the layout is the responsibility of layout widget, such as box.
*/
void rtgui_container_add_child(rtgui_container_t *container, rtgui_widget_t* child)
{
RT_ASSERT(container != RT_NULL);
RT_ASSERT(child != RT_NULL);
/* set parent and toplevel widget */
child->parent = RTGUI_WIDGET(container);
/* put widget to parent's children list */
rtgui_list_append(&(container->children), &(child->sibling));
/* update children toplevel */
if (RTGUI_WIDGET(container)->toplevel != RT_NULL &&
RTGUI_IS_TOPLEVEL(RTGUI_WIDGET(container)->toplevel))
{
child->toplevel = rtgui_widget_get_toplevel(RTGUI_WIDGET(container));
/* update all child toplevel */
if (RTGUI_IS_CONTAINER(child))
{
_rtgui_container_update_toplevel(RTGUI_CONTAINER(child));
}
}
}
/* remove a child to widget */
void rtgui_container_remove_child(rtgui_container_t *container, rtgui_widget_t* child)
{
RT_ASSERT(container != RT_NULL);
RT_ASSERT(child != RT_NULL);
if (child == container->focused)
{
/* set focused to itself */
container->focused = RTGUI_WIDGET(container);
rtgui_widget_focus(RTGUI_WIDGET(container));
}
/* remove widget from parent's children list */
rtgui_list_remove(&(container->children), &(child->sibling));
/* set parent and toplevel widget */
child->parent = RT_NULL;
child->toplevel = RT_NULL;
}
/* destroy all children of container */
void rtgui_container_destroy_children(rtgui_container_t *container)
{
struct rtgui_list_node* node;
if (container == RT_NULL) return;
node = container->children.next;
while (node != RT_NULL)
{
rtgui_widget_t* child = rtgui_list_entry(node, rtgui_widget_t, sibling);
if (RTGUI_IS_CONTAINER(child))
{
/* break parent firstly */
child->parent = RT_NULL;
/* destroy children of child */
rtgui_container_destroy_children(RTGUI_CONTAINER(child));
}
/* remove widget from parent's children list */
rtgui_list_remove(&(container->children), &(child->sibling));
/* set parent and toplevel widget */
child->parent = RT_NULL;
/* destroy object and remove from parent */
rtgui_object_destroy(RTGUI_OBJECT(child));
node = container->children.next;
}
container->children.next = RT_NULL;
container->focused = RTGUI_WIDGET(container);
if (RTGUI_WIDGET(container)->parent != RT_NULL)
rtgui_widget_focus(RTGUI_WIDGET(container));
/* update widget clip */
rtgui_toplevel_update_clip(RTGUI_TOPLEVEL(RTGUI_WIDGET(container)->toplevel));
}
rtgui_widget_t* rtgui_container_get_first_child(rtgui_container_t* container)
{
rtgui_widget_t* child = RT_NULL;
if (container->children.next != RT_NULL)
{
child = rtgui_list_entry(container->children.next, rtgui_widget_t, sibling);
}
return child;
}
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