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rt-thread-official/components/rtgui/widgets/box.c

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/*
* File : box.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/dc.h>
#include <rtgui/widgets/box.h>
#ifndef RTGUI_USING_SMALL_SIZE
static void _rtgui_box_constructor(rtgui_box_t *box)
{
/* init widget and set event handler */
rtgui_object_set_event_handler(RTGUI_OBJECT(box), rtgui_box_event_handler);
RTGUI_WIDGET(box)->flag |= RTGUI_WIDGET_FLAG_TRANSPARENT;
rtgui_object_set_event_handler(RTGUI_OBJECT(box), rtgui_box_event_handler);
/* set proper of control */
box->orient = RTGUI_HORIZONTAL;
box->border_size = RTGUI_BORDER_DEFAULT_WIDTH;
}
DEFINE_CLASS_TYPE(box, "box",
RTGUI_CONTAINER_TYPE,
_rtgui_box_constructor,
RT_NULL,
sizeof(struct rtgui_box));
rt_bool_t rtgui_box_event_handler(struct rtgui_object *widget, rtgui_event_t *event)
{
struct rtgui_box* box = (struct rtgui_box*)widget;
RT_ASSERT(box != RT_NULL);
switch (event->type)
{
case RTGUI_EVENT_RESIZE:
/* re-layout */
rtgui_box_layout(box);
break;
default:
return rtgui_container_event_handler(RTGUI_OBJECT(box), event);
}
return RT_FALSE;
}
struct rtgui_box* rtgui_box_create(int orientation, rtgui_rect_t* rect)
{
struct rtgui_box* box;
box = (struct rtgui_box*) rtgui_widget_create (RTGUI_BOX_TYPE);
if (box != RT_NULL)
{
/* set proper of control */
rtgui_widget_set_rect(RTGUI_WIDGET(box), rect);
box->orient = orientation;
}
return box;
}
void rtgui_box_append(struct rtgui_box* box, rtgui_widget_t* widget)
{
/* put to box's children list */
rtgui_container_add_child(RTGUI_CONTAINER(box), widget);
}
void rtgui_box_delete(struct rtgui_box* box, rtgui_widget_t* widget)
{
/* remove from box's children list */
rtgui_container_remove_child(RTGUI_CONTAINER(box), widget);
}
static void rtgui_box_layout_vertical(rtgui_box_t* box)
{
rtgui_list_t *node;
rt_int32_t box_width;
rt_int32_t space_count;
rt_int32_t next_x, next_y;
rt_int32_t total_height, space_height;
struct rtgui_event_resize size_event;
/* prepare the resize event */
RTGUI_EVENT_RESIZE_INIT(&size_event);
/* find spaces */
space_count = 0;
total_height = 0;
space_height = 0;
rtgui_list_foreach(node, &(RTGUI_CONTAINER(box)->children))
{
rtgui_widget_t* widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
if (widget->align & RTGUI_ALIGN_STRETCH) space_count ++;
else total_height += widget->mini_height;
}
/* calculate the height for each spaces */
if (space_count != 0)
{
space_height = (rtgui_rect_height(RTGUI_WIDGET(box)->extent) - total_height - (box->border_size << 1)) / space_count;
}
/* init (x, y) and box width */
next_x = RTGUI_WIDGET(box)->extent.x1 + box->border_size;
next_y = RTGUI_WIDGET(box)->extent.y1 + box->border_size;
box_width = rtgui_rect_width(RTGUI_WIDGET(box)->extent) - (box->border_size << 1);
/* layout each widget */
rtgui_list_foreach(node, &(RTGUI_CONTAINER(box)->children))
{
rtgui_rect_t *rect;
rtgui_widget_t* widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
/* get extent of widget */
rect = &(widget->extent);
/* reset rect */
rtgui_rect_moveto(rect, -rect->x1, -rect->y1);
rect->x2 = widget->mini_width;
rect->y2 = widget->mini_height;
/* left in default */
rtgui_rect_moveto(rect, next_x, next_y);
if (widget->align & RTGUI_ALIGN_EXPAND)
{
/* expand on horizontal */
rect->x2 = rect->x1 + (rt_int16_t)box_width;
}
if (widget->align & RTGUI_ALIGN_CENTER_VERTICAL)
{
/* center */
rt_uint32_t mid;
mid = box_width - rtgui_rect_width(*rect);
mid = mid /2;
rect->x1 = next_x + mid;
rect->x2 = next_x + box_width - mid;
}
else if (widget->align & RTGUI_ALIGN_RIGHT)
{
/* right */
rect->x1 = next_x + box_width - rtgui_rect_width(*rect);
rect->x2 = next_x + box_width;
}
if (widget->align & RTGUI_ALIGN_STRETCH)
{
rect->y2 = rect->y1 + space_height;
}
/* process resize event */
size_event.x = rect->x1;
size_event.y = rect->y1;
size_event.w = rect->x2 - rect->x1;
size_event.h = rect->y2 - rect->y1;
RTGUI_OBJECT(widget)->event_handler(RTGUI_OBJECT(widget),
&size_event.parent);
/* point to next height */
next_y = rect->y2;
}
}
static void rtgui_box_layout_horizontal(rtgui_box_t* box)
{
rtgui_list_t *node;
rt_int32_t box_height;
rt_int32_t space_count;
rt_int32_t next_x, next_y;
rt_int32_t total_width, space_width;
struct rtgui_event_resize size_event;
/* prepare the resize event */
RTGUI_EVENT_RESIZE_INIT(&size_event);
/* find spaces */
space_count = 0;
total_width = 0;
space_width = 0;
rtgui_list_foreach(node, &(RTGUI_CONTAINER(box)->children))
{
rtgui_widget_t* widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
if (widget->align & RTGUI_ALIGN_STRETCH) space_count ++;
else total_width += widget->mini_width;
}
if (space_count != 0)
{
/* calculate the height for each spaces */
space_width = (rtgui_rect_width(RTGUI_WIDGET(box)->extent) - total_width) / space_count;
}
/* init (x, y) and box height */
next_x = RTGUI_WIDGET(box)->extent.x1 + box->border_size;
next_y = RTGUI_WIDGET(box)->extent.y1 + box->border_size;
box_height = rtgui_rect_height(RTGUI_WIDGET(box)->extent) - (box->border_size << 1);
/* layout each widget */
rtgui_list_foreach(node, &(RTGUI_CONTAINER(box)->children))
{
rtgui_rect_t *rect;
rtgui_widget_t* widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
/* get extent of widget */
rect = &(widget->extent);
/* reset rect */
rtgui_rect_moveto(rect, -rect->x1, -rect->y1);
rect->x2 = widget->mini_width;
rect->y2 = widget->mini_height;
/* top in default */
rtgui_rect_moveto(rect, next_x, next_y);
if (widget->align & RTGUI_ALIGN_EXPAND)
{
/* expand on vertical */
rect->y2 = rect->y1 + box_height;
}
if (widget->align & RTGUI_ALIGN_CENTER_HORIZONTAL)
{
/* center */
rt_uint32_t mid;
mid = box_height - rtgui_rect_height(*rect);
mid = mid /2;
rect->y1 = next_y + mid;
rect->y2 = next_y + box_height - mid;
}
else if (widget->align & RTGUI_ALIGN_RIGHT)
{
/* right */
rect->y1 = next_y + box_height - rtgui_rect_height(*rect);
rect->y2 = next_y + box_height;
}
if (widget->align & RTGUI_ALIGN_STRETCH)
{
rect->x2 = rect->x1 + space_width;
}
/* process resize event */
size_event.x = rect->x1;
size_event.y = rect->y1;
size_event.w = rect->x2 - rect->x1;
size_event.h = rect->y2 - rect->y1;
RTGUI_OBJECT(widget)->event_handler(RTGUI_OBJECT(widget),
&size_event.parent);
/* point to next width */
next_x = rect->x2;
}
}
void rtgui_box_layout(rtgui_box_t* box)
{
RT_ASSERT(box != RT_NULL);
if (box->orient & RTGUI_VERTICAL)
{
rtgui_box_layout_vertical(box);
}
else
{
rtgui_box_layout_horizontal(box);
}
/* update box and its children clip */
if (!RTGUI_WIDGET_IS_HIDE(RTGUI_WIDGET(box)))
{
rtgui_widget_update_clip(RTGUI_WIDGET(box));
}
}
rt_uint32_t rtgui_box_get_width(rtgui_box_t* box)
{
rtgui_list_t *node;
rt_uint32_t width;
width = 0;
rtgui_list_foreach(node, &(RTGUI_CONTAINER(box)->children))
{
rtgui_widget_t* widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
rt_uint32_t widget_width;
widget_width = rtgui_rect_width(widget->extent);
if (box->orient & RTGUI_VERTICAL)
{
/* get the max width */
if (width < widget_width) width = widget_width;
}
else
{
/* get the total width */
width += widget_width;
}
}
return width;
}
rt_uint32_t rtgui_box_get_height(rtgui_box_t* box)
{
rtgui_list_t *node;
rt_uint32_t height;
height = 0;
rtgui_list_foreach(node, &(RTGUI_CONTAINER(box)->children))
{
rtgui_widget_t* widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
rt_uint32_t widget_height;
widget_height = rtgui_rect_height(widget->extent);
if (box->orient & RTGUI_HORIZONTAL)
{
/* get the max height */
if (height < widget_height) height = widget_height;
}
else
{
/* get the total height */
height += widget_height;
}
}
return height;
}
#endif
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