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rt-thread-official/components/rtgui/widgets/scrollbar.c
chaos.proton@gmail.com db06460208 merge new RTGUI in to trunk 
The full log is at https://github.com/RTGUI/RTGUI/commits/merge_1 and it's difficult to merge the new tree commit by commit. I also converted all the file into unix eol so there are many fake diff. Big changes are noted in rtgui/doc/road_map.txt and rtgui/doc/attention.txt. Keep an eye on them if you want to migrate your old code.

Note that the work is still in progress and the bsp is not prepared in trunk so far.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2092 bbd45198-f89e-11dd-88c7-29a3b14d5316
2012-04-18 15:06:12 +00:00

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/*
* File : scrollbar.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
* 2010-08-09 Bernard first version
*/
#include <rtgui/dc.h>
#include <rtgui/rtgui_theme.h>
#include <rtgui/widgets/scrollbar.h>
static void _rtgui_scrollbar_constructor(rtgui_scrollbar_t *bar)
{
struct rtgui_rect rect = {0, 0, RTGUI_DEFAULT_SB_WIDTH, RTGUI_DEFAULT_SB_HEIGHT};
/* set event handler */
rtgui_object_set_event_handler(RTGUI_OBJECT(bar), rtgui_scrollbar_event_handler);
rtgui_scrollbar_set_range(bar, 0, 100);
rtgui_scrollbar_set_page_step(bar, 20);
rtgui_scrollbar_set_line_step(bar, 10);
bar->status = 0;
bar->thumb_position = 0;
bar->thumb_size = 16;
bar->on_scroll = RT_NULL;
bar->orient = RTGUI_HORIZONTAL;
rtgui_widget_set_rect(RTGUI_WIDGET(bar), &rect);
/* set gc */
RTGUI_WIDGET_TEXTALIGN(RTGUI_WIDGET(bar)) = RTGUI_ALIGN_CENTER_HORIZONTAL | RTGUI_ALIGN_CENTER_VERTICAL;
}
rt_inline rt_uint32_t _rtgui_scrollbar_get_length(rtgui_scrollbar_t *bar)
{
struct rtgui_rect rect;
rtgui_widget_get_rect(RTGUI_WIDGET(bar), &rect);
if (bar->orient & RTGUI_VERTICAL)
return rect.y2 - 2 * (rect.x2 - rect.x1);
return rect.x2 - 2 * (rect.y2 - rect.y1);
}
rt_inline rt_uint32_t _rtgui_scrollbar_get_thumb_position(rtgui_scrollbar_t* bar)
{
rt_uint32_t thumb_position;
/* calculate thumb position */
thumb_position = (rtgui_scrollbar_get_value(bar) - bar->min_position) * _rtgui_scrollbar_get_length(bar) /
(bar->max_position - bar->min_position);
return thumb_position;
}
void rtgui_scrollbar_get_thumb_rect(rtgui_scrollbar_t *bar, rtgui_rect_t *rect)
{
struct rtgui_rect scrollbar_rect;
rtgui_widget_get_rect(RTGUI_WIDGET(bar), &scrollbar_rect);
if (bar->orient & RTGUI_VERTICAL)
{
rt_uint32_t btn_width = scrollbar_rect.x2 - scrollbar_rect.x1;
/* vertical scroll bar */
rect->x1 = scrollbar_rect.x1;
rect->x2 = scrollbar_rect.x2;
rect->y1 = scrollbar_rect.y1 + btn_width + _rtgui_scrollbar_get_thumb_position(bar);
rect->y2 = rect->y1 + btn_width;
}
else
{
rt_uint32_t btn_height = scrollbar_rect.y2 - scrollbar_rect.y1;
/* horizontal scroll bar */
rect->x1 = scrollbar_rect.x1 + btn_height + _rtgui_scrollbar_get_thumb_position(bar);
rect->x2 = rect->x1 + btn_height;
rect->y1 = scrollbar_rect.y1;
rect->y2 = scrollbar_rect.y2;
}
}
DEFINE_CLASS_TYPE(scrollbar, "scrollbar",
RTGUI_WIDGET_TYPE,
_rtgui_scrollbar_constructor,
RT_NULL,
sizeof(struct rtgui_scrollbar));
static void _rtgui_scrollbar_on_mouseclick(struct rtgui_widget * widget, struct rtgui_event * event)
{
rtgui_rect_t btn_rect, bar_rect;
rt_uint32_t thumb_size, thumb_position;
struct rtgui_scrollbar* bar = (struct rtgui_scrollbar*)widget;
struct rtgui_event_mouse* mouse = (struct rtgui_event_mouse*)event;
/* get the thumb size and position */
thumb_size = bar->thumb_size * (bar->max_position - bar->min_position) / _rtgui_scrollbar_get_length(bar);
thumb_position = _rtgui_scrollbar_get_thumb_position(bar);
if (bar->orient == RTGUI_VERTICAL)
{
/* get up arrow button rect */
btn_rect.x1 = widget->extent.x1;
btn_rect.x2 = widget->extent.x2;
btn_rect.y1 = widget->extent.y1;
btn_rect.y2 = widget->extent.y1 + (widget->extent.x2 - widget->extent.x1);
if (rtgui_rect_contains_point(&btn_rect, mouse->x, mouse->y) == RT_EOK)
{
if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) ==
(RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN))
{
bar->status |= SBS_UPARROW;
/* line step */
bar->thumb_position -= bar->line_step;
if (bar->thumb_position < bar->min_position) bar->thumb_position = bar->min_position;
}
else if (mouse->button & RTGUI_MOUSE_BUTTON_UP)
{
bar->status = 0;
}
goto __exit;
}
/* get bar rect */
bar_rect.x1 = widget->extent.x1;
bar_rect.x2 = widget->extent.x2;
bar_rect.y1 = widget->extent.y1 + (widget->extent.x2 - widget->extent.x1);
bar_rect.y2 = widget->extent.y2 - (widget->extent.x2 - widget->extent.x1);
if (rtgui_rect_contains_point(&bar_rect, mouse->x, mouse->y) == RT_EOK)
{
if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) ==
(RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN))
{
/* page step */
if (mouse->y < bar_rect.y1 + thumb_position)
{
bar->thumb_position -= bar->page_step;
if (bar->thumb_position < bar->min_position)
bar->thumb_position = bar->min_position;
}
else if (mouse->y > thumb_position + bar->thumb_size)
{
bar->thumb_position += bar->page_step;
if (bar->thumb_position > bar->max_position - thumb_size)
bar->thumb_position = bar->max_position - thumb_size;
}
}
goto __exit;
}
/* get down arrow button rect */
btn_rect.y1 = widget->extent.y2 - (widget->extent.x2 - widget->extent.x1);
btn_rect.y2 = widget->extent.y2;
bar_rect.y1 = widget->extent.y1 + ((widget->extent.y2 - widget->extent.y1)/2);
bar_rect.y2 = widget->extent.y2 - (widget->extent.x2 - widget->extent.x1);
if (rtgui_rect_contains_point(&btn_rect, mouse->x, mouse->y) == RT_EOK)
{
if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) ==
(RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN))
{
bar->status |= SBS_DOWNARROW;
/* line step */
bar->thumb_position += bar->line_step;
if (bar->thumb_position > bar->max_position - thumb_size)
bar->thumb_position = bar->max_position - thumb_size;
}
else if (mouse->button & RTGUI_MOUSE_BUTTON_UP)
bar->status = 0;
}
}
else
{
/* get left arrow button rect */
btn_rect.x1 = widget->extent.x1;
btn_rect.x2 = widget->extent.x1 + (widget->extent.y2 - widget->extent.y1);
btn_rect.y1 = widget->extent.y1;
btn_rect.y2 = widget->extent.y2;
if (rtgui_rect_contains_point(&btn_rect, mouse->x, mouse->y) == RT_EOK)
{
if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) ==
(RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN))
{
bar->status |= SBS_LEFTARROW;
/* line step */
bar->thumb_position -= bar->line_step;
if (bar->thumb_position < bar->min_position) bar->thumb_position = bar->min_position;
}
else if (mouse->button & RTGUI_MOUSE_BUTTON_UP)
bar->status = 0;
goto __exit;
}
/* get bar rect */
bar_rect.x1 = widget->extent.x1 + (widget->extent.y2 - widget->extent.y1);
bar_rect.x2 = widget->extent.x2 - (widget->extent.y2 - widget->extent.y1);
bar_rect.y1 = widget->extent.y1;
bar_rect.y2 = widget->extent.y2;
if (rtgui_rect_contains_point(&bar_rect, mouse->x, mouse->y) == RT_EOK)
{
if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) ==
(RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN))
{
/* page step */
if (mouse->x < bar_rect.x1 + thumb_position)
{
bar->thumb_position -= bar->page_step;
if (bar->thumb_position < bar->min_position)
bar->thumb_position = bar->min_position;
}
else if (mouse->x > thumb_position + bar->thumb_size)
{
bar->thumb_position += bar->page_step;
if (bar->thumb_position > bar->max_position - thumb_size)
bar->thumb_position = bar->max_position - thumb_size;
}
}
goto __exit;
}
/* get right arrow button rect */
btn_rect.x1 = widget->extent.x2 - (widget->extent.y2 - widget->extent.y1);
btn_rect.x2 = widget->extent.x2;
bar_rect.x1 = widget->extent.x1 + ((widget->extent.x2 - widget->extent.x1)/2);
bar_rect.x2 = widget->extent.x2 - (widget->extent.y2 - widget->extent.y1);
if (rtgui_rect_contains_point(&btn_rect,
mouse->x, mouse->y) == RT_EOK)
{
if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) ==
(RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN))
{
bar->status |= SBS_RIGHTARROW;
/* line step */
bar->thumb_position += bar->line_step;
if (bar->thumb_position > bar->max_position - bar->line_step)
bar->thumb_position = bar->max_position - bar->line_step;
}
else if (mouse->button & RTGUI_MOUSE_BUTTON_UP)
bar->status = 0;
}
}
__exit:
rtgui_theme_draw_scrollbar(bar);
if ((mouse->button & (RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN)) ==
(RTGUI_MOUSE_BUTTON_LEFT | RTGUI_MOUSE_BUTTON_DOWN))
{
if (bar->on_scroll != RT_NULL)
bar->on_scroll(RTGUI_OBJECT(widget), RT_NULL);
}
}
rt_bool_t rtgui_scrollbar_event_handler(struct rtgui_object *object,
struct rtgui_event *event)
{
struct rtgui_scrollbar* bar;
RTGUI_WIDGET_EVENT_HANDLER_PREPARE
bar = RTGUI_SCROLLBAR(object);
switch (event->type)
{
case RTGUI_EVENT_PAINT:
#ifndef RTGUI_USING_SMALL_SIZE
if (widget->on_draw != RT_NULL) widget->on_draw(widget, event);
else
#endif
{
rtgui_theme_draw_scrollbar(bar);
}
break;
case RTGUI_EVENT_MOUSE_BUTTON:
if (RTGUI_WIDGET_IS_ENABLE(widget) && !RTGUI_WIDGET_IS_HIDE(widget))
{
#ifndef RTGUI_USING_SMALL_SIZE
if (widget->on_mouseclick != RT_NULL)
{
widget->on_mouseclick(widget, event);
}
else
#endif
{
_rtgui_scrollbar_on_mouseclick(widget, event);
}
}
break;
default:
break;
}
return RT_FALSE;
}
struct rtgui_scrollbar* rtgui_scrollbar_create(int orient, rtgui_rect_t* r)
{
struct rtgui_scrollbar* bar;
bar = (struct rtgui_scrollbar*) rtgui_widget_create (RTGUI_SCROLLBAR_TYPE);
if (bar != RT_NULL)
{
if (r != RT_NULL)
{
rtgui_widget_set_rect(RTGUI_WIDGET(bar), r);
if (orient == RTGUI_VERTICAL)
bar->thumb_size = (r->x2 - r->x1);
else
bar->thumb_size = (r->y2 - r->y1);
}
bar->orient = orient;
}
return bar;
}
void rtgui_scrollbar_destroy(struct rtgui_scrollbar* bar)
{
rtgui_widget_destroy(RTGUI_WIDGET(bar));
}
void rtgui_scrollbar_set_orientation(rtgui_scrollbar_t* bar, int orientation)
{
RT_ASSERT(bar != RT_NULL);
bar->orient = orientation;
#ifndef RTGUI_USING_SMALL_SIZE
if (bar->orient == RTGUI_HORIZONTAL)
{
/* horizontal */
rtgui_widget_set_miniwidth(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_WIDTH);
rtgui_widget_set_miniheight(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_HEIGHT);
}
else
{
/* vertical */
rtgui_widget_set_miniwidth(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_HEIGHT);
rtgui_widget_set_miniheight(RTGUI_WIDGET(bar), RTGUI_DEFAULT_SB_WIDTH);
}
#endif
}
void rtgui_scrollbar_set_range(struct rtgui_scrollbar* bar, int min, int max)
{
RT_ASSERT(bar != RT_NULL);
if (min >= max )
{
RTGUI_WIDGET_DISABLE(RTGUI_WIDGET(bar));
return;
}
bar->min_position = (rt_int16_t)min;
bar->max_position = (rt_int16_t)max;
}
void rtgui_scrollbar_set_page_step(struct rtgui_scrollbar* bar, int step)
{
RT_ASSERT(bar != RT_NULL);
bar->page_step = step;
/* disable or enable scrollbar */
if (bar->page_step > (bar->max_position - bar->min_position))
{
/* disable bar */
RTGUI_WIDGET_DISABLE(RTGUI_WIDGET(bar));
}
else
{
/* enable bar */
RTGUI_WIDGET_ENABLE(RTGUI_WIDGET(bar));
}
}
void rtgui_scrollbar_set_line_step(struct rtgui_scrollbar* bar, int step)
{
RT_ASSERT(bar != RT_NULL);
bar->line_step = step;
}
rt_int16_t rtgui_scrollbar_get_value(struct rtgui_scrollbar* bar)
{
RT_ASSERT(bar != RT_NULL);
return bar->thumb_position;
}
void rtgui_scrollbar_set_value(struct rtgui_scrollbar* bar, rt_int16_t position)
{
RT_ASSERT(bar != RT_NULL);
bar->thumb_position = position;
rtgui_widget_update(RTGUI_WIDGET(bar));
}
void rtgui_scrollbar_set_onscroll(struct rtgui_scrollbar* bar,
rtgui_event_handler_ptr handler)
{
if (bar == RT_NULL || handler == RT_NULL) return;
bar->on_scroll = handler;
}
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