static void rtgui_slider_onmouse(struct rtgui_slider* slider, struct rtgui_event_mouse* event)
{
RT_ASSERT(slider != RT_NULL);
RT_ASSERT(event != RT_NULL);
if (event->button & RTGUI_MOUSE_BUTTON_DOWN &&
event->button & RTGUI_MOUSE_BUTTON_LEFT)
{
int sel;
int range = slider->max - slider->min;
int x0, xsize;
int x;
x0 = 1 + slider->thumb_width/2;
if (slider->orient == RTGUI_VERTICAL)
{
x = event->y - RTGUI_WIDGET(slider)->extent.y1;
x -= x0;
xsize = rtgui_rect_height(RTGUI_WIDGET(slider)->extent) - 2 * x0;
}
else
{
x = event->x - RTGUI_WIDGET(slider)->extent.x1;
x -= x0;
xsize = rtgui_rect_width(RTGUI_WIDGET(slider)->extent) - 2 * x0;
}
if (x <= 0)
{
sel = slider->min;
}
else if (x >= xsize)
{
sel = slider->max;
}
else
{
sel = ((range * x) + xsize/2) / xsize;
sel += slider->min;
}
rtgui_widget_focus(RTGUI_WIDGET(slider));
rtgui_slider_set_value(slider, sel);
if (slider->on_changed != RT_NULL) /* invoke callback function */
slider->on_changed(RTGUI_WIDGET(slider), RT_NULL);
}
}
static void function_action_setup(struct rtgui_widget* widget, void* paramter)
{
rtgui_view_t* view;
rtgui_rect_t rect;
rtgui_label_t* label;
struct rtgui_button* cancel_button, *apply_button, *save_button;
rtgui_workbench_t* workbench = father_workbench;
/* create a demo view */
view = rtgui_view_create("Slider View");
/* 添加到父workbench中 */
rtgui_workbench_add_view(workbench, view);
//设置服务函数
rtgui_widget_set_event_handler(RTGUI_WIDGET(view), view_event_handler);
/* get demo view rect */
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
rtgui_widget_rect_to_device(RTGUI_WIDGET(view), &rect);
label = rtgui_label_create("默认音量:");
rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(label));
rect.x1 += 5; rect.x2 -= 5;
rect.y1 += 5; rect.y2 = rect.y1 + 18;
rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect);
rect.y1 += 20; rect.y2 = rect.y1 + 18;
slider_volume = rtgui_slider_create(0, 100, RTGUI_HORIZONTAL);
rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(slider_volume));
rtgui_widget_set_rect(RTGUI_WIDGET(slider_volume), &rect);
rtgui_slider_set_value(slider_volume, radio_setup.default_volume);
/* get demo view rect */
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
rtgui_widget_rect_to_device(RTGUI_WIDGET(view), &rect);
label = rtgui_label_create("LCD背光亮度:");
rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(label));
rect.x1 += 5; rect.x2 -= 5;
rect.y1 += 50; rect.y2 = rect.y1 + 18;
rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect);
rect.y1 += 20; rect.y2 = rect.y1 + 18;
slider_brightness = rtgui_slider_create(0, 100, RTGUI_HORIZONTAL);
rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(slider_brightness));
rtgui_widget_set_rect(RTGUI_WIDGET(slider_brightness), &rect);
rtgui_slider_set_value(slider_brightness, radio_setup.lcd_brightness);
//得到 "取消" 按键的位置
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
rtgui_widget_rect_to_device(RTGUI_WIDGET(view), &rect);
rect.x1 += 20;
rect.x2 = rect.x1 + 60;
rect.y2 -= 20;
rect.y1 = rect.y2 - 20;
//创建 "取消" 按钮(兼返回)
cancel_button = rtgui_button_create("取消");
/* 设置onbutton动作到demo_view_next函数 */
rtgui_button_set_onbutton(cancel_button, cancel_handler);
/* 设置按钮的位置信息 */
rtgui_widget_set_rect(RTGUI_WIDGET(cancel_button), &rect);
/* 添加按钮到视图中 */
rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(cancel_button));
rect.x1 = rect.x2 + 10;
rect.x2 = rect.x1 + 60;
apply_button = rtgui_button_create("应用");
/* 设置onbutton动作到demo_view_next函数 */
rtgui_button_set_onbutton(apply_button, apply_handler);
/* 设置按钮的位置信息 */
rtgui_widget_set_rect(RTGUI_WIDGET(apply_button), &rect);
/* 添加按钮到视图中 */
rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(apply_button));
//得到 "保存" 按键的位置
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
rtgui_widget_rect_to_device(RTGUI_WIDGET(view), &rect);
rect.x2 -= 20;
rect.x1 = rect.x2 - 60;
rect.y2 -= 20;
rect.y1 = rect.y2 - 20;
/* 创建 "保存" 按钮 */
save_button = rtgui_button_create("保存");
/* 设置onbutton动作到demo_view_prev函数 */
rtgui_button_set_onbutton(save_button, save_handler);
/* 设置按钮的位置信息 */
rtgui_widget_set_rect(RTGUI_WIDGET(save_button), &rect);
/* 添加按钮到视图中 */
rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(save_button));
rtgui_view_show(view, RT_FALSE);
}
