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rt-thread/components/rtgui/widgets/button.c

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/*
* File : button.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/rtgui_theme.h>
#include <rtgui/widgets/button.h>
#include <rtgui/widgets/window.h>
static rt_bool_t rtgui_button_onunfocus(struct rtgui_object *object, rtgui_event_t *event);
static void _rtgui_button_constructor(rtgui_button_t *button)
{
/* init widget and set event handler */
RTGUI_WIDGET(button)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE;
rtgui_object_set_event_handler(RTGUI_OBJECT(button), rtgui_button_event_handler);
rtgui_widget_set_onunfocus(RTGUI_WIDGET(button), rtgui_button_onunfocus);
/* un-press button */
button->flag = 0;
/* set flag and on_button event handler */
button->pressed_image = RT_NULL;
button->unpressed_image = RT_NULL;
button->on_button = RT_NULL;
/* set gc */
RTGUI_WIDGET_FOREGROUND(button) = default_foreground;
RTGUI_WIDGET_BACKGROUND(button) = RTGUI_RGB(212, 208, 200);
RTGUI_WIDGET_TEXTALIGN(button) = RTGUI_ALIGN_CENTER_HORIZONTAL | RTGUI_ALIGN_CENTER_VERTICAL;
}
static void _rtgui_button_destructor(rtgui_button_t *button)
{
if (button->pressed_image != RT_NULL)
{
rtgui_image_destroy(button->pressed_image);
button->pressed_image = RT_NULL;
}
if (button->unpressed_image != RT_NULL)
{
rtgui_image_destroy(button->unpressed_image);
button->unpressed_image = RT_NULL;
}
}
DEFINE_CLASS_TYPE(button, "button",
RTGUI_LABEL_TYPE,
_rtgui_button_constructor,
_rtgui_button_destructor,
sizeof(struct rtgui_button));
rt_bool_t rtgui_button_event_handler(struct rtgui_object *object, struct rtgui_event *event)
{
struct rtgui_widget *widget;
struct rtgui_button *btn;
RT_ASSERT(object != RT_NULL);
RT_ASSERT(event != RT_NULL);
widget = RTGUI_WIDGET(object);
btn = RTGUI_BUTTON(widget);
switch (event->type)
{
case RTGUI_EVENT_PAINT:
rtgui_theme_draw_button(btn);
break;
case RTGUI_EVENT_KBD:
{
struct rtgui_event_kbd *ekbd = (struct rtgui_event_kbd *) event;
if (RTGUI_WIDGET_IS_HIDE(widget)) return RT_FALSE;
if ((ekbd->key == RTGUIK_RETURN) || (ekbd->key == RTGUIK_SPACE))
{
if (RTGUI_KBD_IS_DOWN(ekbd))
{
btn->flag |= RTGUI_BUTTON_FLAG_PRESS;
}
else
{
btn->flag &= ~RTGUI_BUTTON_FLAG_PRESS;
}
/* draw button */
rtgui_theme_draw_button(btn);
if ((btn->flag & RTGUI_BUTTON_FLAG_PRESS) && (btn->on_button != RT_NULL))
{
/* call on button handler */
btn->on_button(RTGUI_OBJECT(widget), event);
}
}
}
break;
case RTGUI_EVENT_MOUSE_BUTTON:
if (RTGUI_WIDGET_IS_HIDE(widget)) return RT_FALSE;
{
struct rtgui_event_mouse *emouse = (struct rtgui_event_mouse *)event;
/* it's not this widget event, clean status */
if (rtgui_rect_contains_point(&(RTGUI_WIDGET(btn)->extent),
emouse->x, emouse->y) != RT_EOK)
{
btn->flag &= ~RTGUI_BUTTON_FLAG_PRESS;
/* draw button */
rtgui_theme_draw_button(btn);
break;
}
if (btn->flag & RTGUI_BUTTON_TYPE_PUSH)
{
/* it's a push button */
if (emouse->button & RTGUI_MOUSE_BUTTON_UP)
{
if (btn->flag & RTGUI_BUTTON_FLAG_PRESS)
{
btn->flag &= ~RTGUI_BUTTON_FLAG_PRESS;
}
else
{
btn->flag |= RTGUI_BUTTON_FLAG_PRESS;
}
/* draw button */
rtgui_theme_draw_button(btn);
if (btn->on_button != RT_NULL)
{
/* call on button handler */
btn->on_button(RTGUI_OBJECT(widget), event);
}
#ifndef RTGUI_USING_SMALL_SIZE
/* invokes call back */
if (widget->on_mouseclick != RT_NULL &&
emouse->button & RTGUI_MOUSE_BUTTON_UP)
return widget->on_mouseclick(RTGUI_OBJECT(widget), event);
#endif
}
}
else
{
if (emouse->button & RTGUI_MOUSE_BUTTON_LEFT)
{
/* set the last mouse event handled widget */
struct rtgui_win *win;
win = RTGUI_WIN(RTGUI_WIDGET(btn)->toplevel);
win->last_mevent_widget = RTGUI_WIDGET(btn);
/* it's a normal button */
if (emouse->button & RTGUI_MOUSE_BUTTON_DOWN)
{
btn->flag |= RTGUI_BUTTON_FLAG_PRESS;
}
else
{
btn->flag &= ~RTGUI_BUTTON_FLAG_PRESS;
}
/* draw button */
rtgui_theme_draw_button(btn);
#ifndef RTGUI_USING_SMALL_SIZE
/* invokes call back */
if (widget->on_mouseclick != RT_NULL &&
emouse->button & RTGUI_MOUSE_BUTTON_UP)
return widget->on_mouseclick(RTGUI_OBJECT(widget), event);
#endif
if (!(btn->flag & RTGUI_BUTTON_FLAG_PRESS) && (btn->on_button != RT_NULL))
{
/* call on button handler */
btn->on_button(RTGUI_OBJECT(widget), event);
}
}
}
return RT_TRUE;
}
default:
return rtgui_widget_event_handler(object, event);
}
return RT_FALSE;
}
RTM_EXPORT(rtgui_button_event_handler);
rtgui_button_t *rtgui_button_create(const char *text)
{
struct rtgui_button *btn;
btn = (struct rtgui_button *) rtgui_widget_create(RTGUI_BUTTON_TYPE);
if (btn != RT_NULL)
{
rtgui_rect_t rect;
/* set default rect */
rtgui_font_get_metrics(rtgui_font_default(), text, &rect);
rect.x2 += (RTGUI_BORDER_DEFAULT_WIDTH << 1);
rect.y2 += (RTGUI_BORDER_DEFAULT_WIDTH << 1);
rtgui_widget_set_rect(RTGUI_WIDGET(btn), &rect);
rtgui_label_set_text(RTGUI_LABEL(btn), text);
}
return btn;
}
RTM_EXPORT(rtgui_button_create);
rtgui_button_t *rtgui_pushbutton_create(const char *text)
{
rtgui_button_t *btn;
btn = rtgui_button_create(text);
if (btn != RT_NULL) btn->flag |= RTGUI_BUTTON_TYPE_PUSH;
return btn;
}
RTM_EXPORT(rtgui_pushbutton_create);
void rtgui_button_destroy(rtgui_button_t *btn)
{
rtgui_widget_destroy(RTGUI_WIDGET(btn));
}
RTM_EXPORT(rtgui_button_destroy);
void rtgui_button_set_pressed_image(rtgui_button_t *btn, rtgui_image_t *image)
{
RT_ASSERT(btn != RT_NULL);
btn->pressed_image = image;
}
RTM_EXPORT(rtgui_button_set_pressed_image);
void rtgui_button_set_unpressed_image(rtgui_button_t *btn, rtgui_image_t *image)
{
RT_ASSERT(btn != RT_NULL);
btn->unpressed_image = image;
}
RTM_EXPORT(rtgui_button_set_unpressed_image);
void rtgui_button_set_onbutton(rtgui_button_t *btn, rtgui_onbutton_func_t func)
{
RT_ASSERT(btn != RT_NULL);
btn->on_button = func;
}
RTM_EXPORT(rtgui_button_set_onbutton);
static rt_bool_t rtgui_button_onunfocus(struct rtgui_object *object, rtgui_event_t *event)
{
rtgui_rect_t rect;
rtgui_widget_t *widget;
struct rtgui_dc *dc;
RT_ASSERT(object);
widget = RTGUI_WIDGET(object);
dc = rtgui_dc_begin_drawing(widget);
if (dc == RT_NULL) return RT_FALSE;
rtgui_widget_get_rect(widget, &rect);
if (!RTGUI_WIDGET_IS_FOCUSED(widget))
{
/* only clear focus rect */
rtgui_color_t color;
rtgui_rect_inflate(&rect, -2);
color = RTGUI_DC_FC(dc);
RTGUI_DC_FC(dc) = RTGUI_DC_BC(dc);
rtgui_dc_draw_focus_rect(dc, &rect);
RTGUI_DC_FC(dc) = color;
}
rtgui_dc_end_drawing(dc);
return RT_TRUE;
}
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