289 lines
8.0 KiB
C
289 lines
8.0 KiB
C
/*
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* File : box.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2009-10-16 Bernard first version
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*/
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#include <rtgui/dc.h>
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#include <rtgui/widgets/box.h>
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static void _rtgui_box_constructor(rtgui_box_t *box)
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{
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/* init widget and set event handler */
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rtgui_object_set_event_handler(RTGUI_OBJECT(box), RT_NULL);
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/* set proper of control */
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box->orient = RTGUI_HORIZONTAL;
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box->border_size = RTGUI_BORDER_DEFAULT_WIDTH;
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box->container = RT_NULL;
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}
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DEFINE_CLASS_TYPE(box, "box",
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RTGUI_OBJECT_TYPE,
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_rtgui_box_constructor,
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RT_NULL,
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sizeof(struct rtgui_box));
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struct rtgui_box *rtgui_box_create(int orientation, int border_size)
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{
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struct rtgui_box *box;
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box = (struct rtgui_box *) rtgui_object_create(RTGUI_BOX_TYPE);
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if (box != RT_NULL)
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{
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box->orient = orientation;
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box->border_size = border_size;
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}
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return box;
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}
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RTM_EXPORT(rtgui_box_create);
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void rtgui_box_destroy(struct rtgui_box *box)
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{
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rtgui_object_destroy(RTGUI_OBJECT(box));
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}
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RTM_EXPORT(rtgui_box_destroy);
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static void rtgui_box_layout_vertical(struct rtgui_box *box, struct rtgui_rect *extent)
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{
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rtgui_list_t *node;
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rt_int32_t box_width;
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rt_int32_t space_count;
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rt_int32_t next_x, next_y;
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rt_int32_t total_height, space_height;
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struct rtgui_event_resize size_event;
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/* prepare the resize event */
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RTGUI_EVENT_RESIZE_INIT(&size_event);
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/* find spaces */
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space_count = 0;
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total_height = 0;
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space_height = 0;
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rtgui_list_foreach(node, &(box->container->children))
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{
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rtgui_widget_t *widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
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if (widget->align & RTGUI_ALIGN_STRETCH) space_count ++;
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else total_height += widget->mini_height;
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}
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/* calculate the height for each spaces */
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if (space_count != 0)
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{
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space_height = (rtgui_rect_height(*extent) - total_height - (box->border_size << 1)) / space_count;
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}
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/* init (x, y) and box width */
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next_x = extent->x1 + box->border_size;
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next_y = extent->y1 + box->border_size;
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box_width = rtgui_rect_width(*extent) - (box->border_size << 1);
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/* layout each widget */
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rtgui_list_foreach(node, &(box->container->children))
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{
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struct rtgui_rect *rect;
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rtgui_widget_t *widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
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/* get extent of widget */
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rect = &(widget->extent);
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/* reset rect */
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rtgui_rect_moveto(rect, -rect->x1, -rect->y1);
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rect->x2 = widget->mini_width;
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rect->y2 = widget->mini_height;
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/* left in default */
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rtgui_rect_moveto(rect, next_x, next_y);
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if (widget->align & RTGUI_ALIGN_EXPAND)
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{
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/* expand on horizontal */
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rect->x2 = rect->x1 + (rt_int16_t)box_width;
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}
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if (widget->align & RTGUI_ALIGN_CENTER_VERTICAL)
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{
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/* center */
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rt_uint32_t mid;
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mid = box_width - rtgui_rect_width(*rect);
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mid = mid / 2;
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rect->x1 = next_x + mid;
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rect->x2 = next_x + box_width - mid;
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}
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else if (widget->align & RTGUI_ALIGN_RIGHT)
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{
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/* right */
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rect->x1 = next_x + box_width - rtgui_rect_width(*rect);
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rect->x2 = next_x + box_width;
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}
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if (widget->align & RTGUI_ALIGN_STRETCH)
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{
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rect->y2 = rect->y1 + space_height;
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}
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/* process resize event */
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size_event.x = rect->x1;
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size_event.y = rect->y1;
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size_event.w = rect->x2 - rect->x1;
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size_event.h = rect->y2 - rect->y1;
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RTGUI_OBJECT(widget)->event_handler(RTGUI_OBJECT(widget),
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&size_event.parent);
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/* point to next height */
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next_y = rect->y2 + box->border_size;
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}
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}
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static void rtgui_box_layout_horizontal(struct rtgui_box *box, struct rtgui_rect *extent)
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{
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rtgui_list_t *node;
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rt_int32_t box_height;
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rt_int32_t space_count;
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rt_int32_t next_x, next_y;
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rt_int32_t total_width, space_width;
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struct rtgui_event_resize size_event;
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/* prepare the resize event */
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RTGUI_EVENT_RESIZE_INIT(&size_event);
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/* find spaces */
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space_count = 0;
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total_width = 0;
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space_width = 0;
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rtgui_list_foreach(node, &(box->container->children))
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{
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rtgui_widget_t *widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
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if (widget->align & RTGUI_ALIGN_STRETCH) space_count ++;
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else total_width += widget->mini_width;
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}
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if (space_count != 0)
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{
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/* calculate the height for each spaces */
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space_width = (rtgui_rect_width(*extent) - total_width) / space_count;
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}
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/* init (x, y) and box height */
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next_x = extent->x1 + box->border_size;
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next_y = extent->y1 + box->border_size;
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box_height = rtgui_rect_height(*extent) - (box->border_size << 1);
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/* layout each widget */
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rtgui_list_foreach(node, &(box->container->children))
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{
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rtgui_rect_t *rect;
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rtgui_widget_t *widget = rtgui_list_entry(node, struct rtgui_widget, sibling);
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/* get extent of widget */
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rect = &(widget->extent);
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/* reset rect */
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rtgui_rect_moveto(rect, -rect->x1, -rect->y1);
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rect->x2 = widget->mini_width;
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rect->y2 = widget->mini_height;
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/* top in default */
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rtgui_rect_moveto(rect, next_x, next_y);
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if (widget->align & RTGUI_ALIGN_EXPAND)
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{
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/* expand on vertical */
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rect->y2 = rect->y1 + box_height;
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}
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if (widget->align & RTGUI_ALIGN_CENTER_HORIZONTAL)
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{
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/* center */
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rt_uint32_t mid;
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mid = box_height - rtgui_rect_height(*rect);
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mid = mid / 2;
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rect->y1 = next_y + mid;
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rect->y2 = next_y + box_height - mid;
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}
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else if (widget->align & RTGUI_ALIGN_RIGHT)
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{
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/* right */
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rect->y1 = next_y + box_height - rtgui_rect_height(*rect);
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rect->y2 = next_y + box_height;
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}
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if (widget->align & RTGUI_ALIGN_STRETCH)
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{
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rect->x2 = rect->x1 + space_width;
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}
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/* process resize event */
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size_event.x = rect->x1;
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size_event.y = rect->y1;
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size_event.w = rect->x2 - rect->x1;
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size_event.h = rect->y2 - rect->y1;
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RTGUI_OBJECT(widget)->event_handler(RTGUI_OBJECT(widget),
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&size_event.parent);
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/* point to next width */
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next_x = rect->x2 + box->border_size;
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}
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}
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void rtgui_box_layout(rtgui_box_t *box)
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{
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struct rtgui_rect extent;
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RT_ASSERT(box != RT_NULL);
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if (box->container == RT_NULL) return;
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rtgui_widget_get_extent(RTGUI_WIDGET(box->container), &extent);
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if (box->orient & RTGUI_VERTICAL)
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{
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rtgui_box_layout_vertical(box, &extent);
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}
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else
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{
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rtgui_box_layout_horizontal(box, &extent);
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}
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/* update box and its children clip */
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if (!RTGUI_WIDGET_IS_HIDE(RTGUI_WIDGET(box->container)))
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{
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rtgui_widget_update_clip(RTGUI_WIDGET(box->container));
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}
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}
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RTM_EXPORT(rtgui_box_layout);
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void rtgui_box_layout_rect(rtgui_box_t *box, struct rtgui_rect *rect)
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{
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RT_ASSERT(box != RT_NULL);
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if (box->container == RT_NULL) return;
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if (box->orient & RTGUI_VERTICAL)
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{
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rtgui_box_layout_vertical(box, rect);
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}
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else
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{
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rtgui_box_layout_horizontal(box, rect);
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}
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/* update box and its children clip */
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if (!RTGUI_WIDGET_IS_HIDE(RTGUI_WIDGET(box->container)))
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{
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rtgui_widget_update_clip(RTGUI_WIDGET(box->container));
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}
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}
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RTM_EXPORT(rtgui_box_layout_rect);
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