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

556 lines
13 KiB
C

/*
* File : widget.c
* This file is part of RTGUI in 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
* 2009-10-04 Bernard first version
*/
#include <rtgui/widgets/widget.h>
#include <rtgui/widgets/window.h>
#include <rtgui/widgets/view.h>
static void _rtgui_widget_constructor(rtgui_widget_t *widget)
{
if (!widget) return;
/* set default flag */
widget->flag = RTGUI_WIDGET_FLAG_DEFAULT;
/* init list */
rtgui_list_init(&(widget->sibling));
/* init gc */
widget->gc.foreground = default_foreground;
widget->gc.background = default_background;
widget->gc.font = rtgui_font_default();
widget->gc.textalign = RTGUI_ALIGN_LEFT | RTGUI_ALIGN_TOP;
widget->align = RTGUI_ALIGN_LEFT | RTGUI_ALIGN_TOP;
/* set parent and toplevel root */
widget->parent = RT_NULL;
widget->toplevel = RT_NULL;
/* some common event handler */
widget->on_focus_in = RT_NULL;
widget->on_focus_out = RT_NULL;
#ifndef RTGUI_USING_SMALL_SIZE
widget->on_draw = RT_NULL;
widget->on_mouseclick = RT_NULL;
widget->on_key = RT_NULL;
widget->on_size = RT_NULL;
widget->on_command = RT_NULL;
#endif
/* set default event handler */
widget->event_handler = rtgui_widget_event_handler;
/* does not set widget extent and only set clip_sync to zero */
rtgui_region_init(&(widget->clip));
widget->clip_sync = 0;
}
/* Destroys the widget */
static void _rtgui_widget_destructor(rtgui_widget_t *widget)
{
if (widget == RT_NULL) return;
if (widget->parent != RT_NULL)
{
/* remove widget from parent's children list */
rtgui_list_remove(&(RTGUI_CONTAINER(widget->parent)->children), &(widget->sibling));
widget->parent = RT_NULL;
}
/* fini clip region */
rtgui_region_fini(&(widget->clip));
widget->clip_sync = 0;
}
rtgui_type_t *rtgui_widget_type_get(void)
{
static rtgui_type_t *widget_type = RT_NULL;
if (!widget_type)
{
widget_type = rtgui_type_create("rtgui_widget", RTGUI_OBJECT_TYPE,
sizeof(rtgui_widget_t), RTGUI_CONSTRUCTOR(_rtgui_widget_constructor),
RTGUI_DESTRUCTOR(_rtgui_widget_destructor));
}
return widget_type;
}
rtgui_widget_t *rtgui_widget_create(rtgui_type_t *widget_type)
{
struct rtgui_widget* widget;
widget = RTGUI_WIDGET(rtgui_object_create(widget_type));
return widget;
}
void rtgui_widget_destroy(rtgui_widget_t* widget)
{
rtgui_object_destroy(RTGUI_OBJECT(widget));
}
void rtgui_widget_set_rect(rtgui_widget_t* widget, rtgui_rect_t* rect)
{
if (widget == RT_NULL || rect == RT_NULL) return;
widget->extent = *rect;
#ifndef RTGUI_USING_SMALL_SIZE
/* reset mini width and height */
widget->mini_width = rtgui_rect_width(widget->extent);
widget->mini_height = rtgui_rect_height(widget->extent);
#endif
/* it's not empty, fini it */
if (rtgui_region_not_empty(&(widget->clip)))
{
rtgui_region_fini(&(widget->clip));
}
/* reset clip info */
rtgui_region_init_with_extents(&(widget->clip), rect);
}
#ifndef RTGUI_USING_SMALL_SIZE
void rtgui_widget_set_miniwidth(rtgui_widget_t* widget, int width)
{
RT_ASSERT(widget != RT_NULL);
widget->mini_width = width;
}
void rtgui_widget_set_miniheight(rtgui_widget_t* widget, int height)
{
RT_ASSERT(widget != RT_NULL);
widget->mini_height = height;
}
#endif
/*
* This function moves widget and its children to a logic point
*/
void rtgui_widget_move_to_logic(rtgui_widget_t* widget, int dx, int dy)
{
struct rtgui_list_node* node;
rtgui_widget_t* child;
if (widget == RT_NULL) return;
rtgui_rect_moveto(&(widget->extent), dx, dy);
/* move each child */
if (RTGUI_IS_CONTAINER(widget))
{
rtgui_list_foreach(node, &(RTGUI_CONTAINER(widget)->children))
{
child = rtgui_list_entry(node, rtgui_widget_t, sibling);
rtgui_widget_move_to_logic(child, dx, dy);
}
}
}
void rtgui_widget_set_event_handler(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->event_handler = handler;
}
void rtgui_widget_get_rect(rtgui_widget_t* widget, rtgui_rect_t *rect)
{
RT_ASSERT(widget != RT_NULL);
if (rect != RT_NULL)
{
rect->x1 = rect->y1 = 0;
rect->x2 = widget->extent.x2 - widget->extent.x1;
rect->y2 = widget->extent.y2 - widget->extent.y1;
}
}
void rtgui_widget_set_onfocus(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->on_focus_in = handler;
}
void rtgui_widget_set_onunfocus(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->on_focus_out = handler;
}
#ifndef RTGUI_USING_SMALL_SIZE
void rtgui_widget_set_ondraw(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->on_draw = handler;
}
void rtgui_widget_set_onmouseclick(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->on_mouseclick = handler;
}
void rtgui_widget_set_onkey(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->on_key = handler;
}
void rtgui_widget_set_onsize(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->on_size = handler;
}
void rtgui_widget_set_oncommand(rtgui_widget_t* widget, rtgui_event_handler_ptr handler)
{
RT_ASSERT(widget != RT_NULL);
widget->on_command = handler;
}
#endif
/**
* @brief Focuses the widget. The focused widget is the widget which can receive the keyboard events
* @param widget a widget
* @note The widget has to be attached to a toplevel widget, otherwise it will have no effect
*/
void rtgui_widget_focus(rtgui_widget_t *widget)
{
rtgui_widget_t *focused;
rtgui_container_t *parent;
RT_ASSERT(widget != RT_NULL);
if (!widget->parent || !RTGUI_WIDGET_IS_FOCUSABLE(widget) || !RTGUI_WIDGET_IS_ENABLE(widget))
return;
/* set widget as focused */
widget->flag |= RTGUI_WIDGET_FLAG_FOCUS;
/* get parent container */
parent = RTGUI_CONTAINER(widget->parent);
/* get old focused widget */
focused = parent->focused;
if (focused == widget) return ; /* it's the same focused widget */
if (focused != RT_NULL)
rtgui_widget_unfocus(focused);
/* set widget as focused widget in parent link */
parent->focused = widget;
while (RTGUI_WIDGET(parent)->parent != RT_NULL)
{
parent = RTGUI_CONTAINER(RTGUI_WIDGET(parent)->parent);
parent->focused = widget;
/* if the parent is hide, break it */
if (RTGUI_WIDGET_IS_HIDE(RTGUI_WIDGET(parent))) break;
}
/* invoke on focus in call back */
if (widget->on_focus_in != RT_NULL)
widget->on_focus_in(widget, RT_NULL);
}
/**
* @brief Unfocused the widget
* @param widget a widget
*/
void rtgui_widget_unfocus(rtgui_widget_t *widget)
{
RT_ASSERT(widget != RT_NULL);
if (!widget->toplevel || !RTGUI_WIDGET_IS_FOCUSED(widget))
return;
widget->flag &= ~RTGUI_WIDGET_FLAG_FOCUS;
if (widget->on_focus_out != RT_NULL)
widget->on_focus_out(widget, RT_NULL);
/* refresh widget */
rtgui_widget_update(widget);
}
void rtgui_widget_point_to_device(rtgui_widget_t* widget, rtgui_point_t* point)
{
RT_ASSERT(widget != RT_NULL);
if (point != RT_NULL)
{
point->x += widget->extent.x1;
point->y += widget->extent.y1;
}
}
void rtgui_widget_rect_to_device(rtgui_widget_t* widget, rtgui_rect_t* rect)
{
RT_ASSERT(widget != RT_NULL);
if (rect != RT_NULL)
{
rect->x1 += widget->extent.x1;
rect->x2 += widget->extent.x1;
rect->y1 += widget->extent.y1;
rect->y2 += widget->extent.y1;
}
}
void rtgui_widget_point_to_logic(rtgui_widget_t* widget, rtgui_point_t* point)
{
RT_ASSERT(widget != RT_NULL);
if (point != RT_NULL)
{
point->x -= widget->extent.x1;
point->y -= widget->extent.y1;
}
}
void rtgui_widget_rect_to_logic(rtgui_widget_t* widget, rtgui_rect_t* rect)
{
RT_ASSERT(widget != RT_NULL);
if (rect != RT_NULL)
{
rect->x1 -= widget->extent.x1;
rect->x2 -= widget->extent.x1;
rect->y1 -= widget->extent.y1;
rect->y2 -= widget->extent.y1;
}
}
rtgui_widget_t* rtgui_widget_get_toplevel(rtgui_widget_t* widget)
{
rtgui_widget_t* r;
RT_ASSERT(widget != RT_NULL);
if (widget->toplevel) return widget->toplevel;
r = widget;
/* get the toplevel widget */
while (r->parent != RT_NULL) r = r->parent;
/* set toplevel */
widget->toplevel = r;
return r;
}
rt_bool_t rtgui_widget_event_handler(rtgui_widget_t* widget, rtgui_event_t* event)
{
#ifndef RTGUI_USING_SMALL_SIZE
switch (event->type)
{
case RTGUI_EVENT_PAINT:
if (widget->on_draw != RT_NULL) return widget->on_draw(widget, event);
break;
case RTGUI_EVENT_KBD:
if (widget->on_key != RT_NULL) return widget->on_key(widget, event);
break;
case RTGUI_EVENT_MOUSE_BUTTON:
if (widget->on_mouseclick != RT_NULL) return widget->on_mouseclick(widget, event);
break;
case RTGUI_EVENT_COMMAND:
if (widget->on_command != RT_NULL) return widget->on_command(widget, event);
break;
case RTGUI_EVENT_RESIZE:
if (widget->on_size != RT_NULL) return widget->on_size(widget, event);
break;
}
#endif
return RT_FALSE;
}
/*
* This function updates the clip info of widget
*/
void rtgui_widget_update_clip(rtgui_widget_t* widget)
{
struct rtgui_list_node* node;
rtgui_widget_t *parent;
/* no widget or widget is hide, no update clip */
if (widget == RT_NULL || RTGUI_WIDGET_IS_HIDE(widget)) return;
parent = widget->parent;
/* if there is no parent, do not update clip (please use toplevel widget API) */
if (parent == RT_NULL) return;
/* increase clip sync */
widget->clip_sync ++;
/* reset clip to extent */
rtgui_region_reset(&(widget->clip), &(widget->extent));
/* limit widget extent in parent extent */
rtgui_region_intersect(&(widget->clip), &(widget->clip), &(parent->clip));
/* get the no transparent parent */
while (parent != RT_NULL && parent->flag & RTGUI_WIDGET_FLAG_TRANSPARENT)
{
parent = parent->parent;
}
if (parent != RT_NULL)
{
/* subtract widget clip in parent clip */
if (!(widget->flag & RTGUI_WIDGET_FLAG_TRANSPARENT))
{
rtgui_region_subtract_rect(&(parent->clip), &(parent->clip),
&(widget->extent));
}
}
/*
* note: since the layout widget introduction, the sibling widget will not
* intersect.
*/
/* if it's a container object, update the clip info of children */
if (RTGUI_IS_CONTAINER(widget))
{
rtgui_widget_t* child;
rtgui_list_foreach(node, &(RTGUI_CONTAINER(widget)->children))
{
child = rtgui_list_entry(node, rtgui_widget_t, sibling);
rtgui_widget_update_clip(child);
}
}
}
void rtgui_widget_show(rtgui_widget_t* widget)
{
/* there is no parent or the parent is hide, no show at all */
if (widget->parent == RT_NULL ||
RTGUI_WIDGET_IS_HIDE(widget->parent)) return;
/* update the clip info of widget */
RTGUI_WIDGET_UNHIDE(widget);
rtgui_widget_update_clip(widget);
}
void rtgui_widget_hide(rtgui_widget_t* widget)
{
/* hide this widget */
RTGUI_WIDGET_HIDE(widget);
/* update the clip info of widget parent */
rtgui_widget_update_clip(widget->parent);
}
rtgui_color_t rtgui_widget_get_parent_foreground(rtgui_widget_t* widget)
{
rtgui_widget_t* parent;
/* get parent widget */
parent = widget->parent;
while (parent->parent != RT_NULL && (RTGUI_WIDGET_FLAG(parent) & RTGUI_WIDGET_FLAG_TRANSPARENT))
parent = parent->parent;
/* get parent's color */
if (parent != RT_NULL)
return RTGUI_WIDGET_FOREGROUND(parent);
return RTGUI_WIDGET_FOREGROUND(widget);
}
rtgui_color_t rtgui_widget_get_parent_background(rtgui_widget_t* widget)
{
rtgui_widget_t* parent;
/* get parent widget */
parent = widget->parent;
while (parent->parent != RT_NULL && (RTGUI_WIDGET_FLAG(parent) & RTGUI_WIDGET_FLAG_TRANSPARENT))
parent = parent->parent;
/* get parent's color */
if (parent != RT_NULL)
return RTGUI_WIDGET_BACKGROUND(parent);
return RTGUI_WIDGET_BACKGROUND(widget);
}
void rtgui_widget_update(rtgui_widget_t* widget)
{
struct rtgui_event_paint paint;
RTGUI_EVENT_PAINT_INIT(&paint);
paint.wid = RT_NULL;
RT_ASSERT(widget != RT_NULL);
if (widget->event_handler != RT_NULL)
{
widget->event_handler(widget, &paint.parent);
}
}
rtgui_widget_t* rtgui_widget_get_next_sibling(rtgui_widget_t* widget)
{
rtgui_widget_t* sibling = RT_NULL;
if (widget->sibling.next != RT_NULL)
{
sibling = rtgui_list_entry(widget->sibling.next, rtgui_widget_t, sibling);
}
return sibling;
}
rtgui_widget_t* rtgui_widget_get_prev_sibling(rtgui_widget_t* widget)
{
struct rtgui_list_node* node;
rtgui_widget_t *sibling, *parent;
node = RT_NULL; sibling = RT_NULL;
parent = widget->parent;
if (parent != RT_NULL)
{
rtgui_list_foreach(node, &(RTGUI_CONTAINER(parent)->children))
{
if (node->next == &(widget->sibling))
break;
}
}
if (node != RT_NULL)
sibling = rtgui_list_entry(node, rtgui_widget_t, sibling);
return sibling;
}