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67 lines
1.7 KiB
Markdown
67 lines
1.7 KiB
Markdown
# 如何启用屏保
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屏保是一个普通窗口，定时切换不同的图片或者动态绘制一些图形，以到达保护屏幕的效果。
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## 一、设置屏保定时器时间
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用函数window\_manager\_set\_screen\_saver\_time设置屏保时间。
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```
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/**
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* @method window_manager_set_screen_saver_time
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* 设置屏保时间。
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* @annotation ["scriptable"]
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* @param {widget_t*} widget 窗口管理器对象。
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* @param {uint32_t} screen_saver_time 屏保时间(单位毫秒)。
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*
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* @return {ret_t} 返回RET_OK表示成功，否则表示失败。
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*/
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ret_t window_manager_set_screen_saver_time(widget_t* widget, uint32_t screen_saver_time);
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```
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```
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window_manager_set_screen_saver_time(window_manager(), 180 * 1000);
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```
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## 二、注册事件并打开屏保窗口
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示例：
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```
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static ret_t close_window_on_event(void* ctx, event_t* e) {
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window_close(WIDGET(ctx));
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return RET_REMOVE;
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}
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static ret_t on_screen_saver(void* ctx, event_t* e) {
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widget_t* win = NULL;
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const char* screen_saver_win = "image_animation";
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if (widget_child(window_manager(), screen_saver_win) != NULL) {
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log_debug("screen saver exist.\n");
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return RET_OK;
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}
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win = window_open(screen_saver_win);
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widget_on(win, EVT_POINTER_MOVE, close_window_on_event, win);
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widget_on(win, EVT_POINTER_UP, close_window_on_event, win);
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widget_on(win, EVT_KEY_UP, close_window_on_event, win);
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return RET_OK;
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}
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ret_t application_init() {
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tk_ext_widgets_init();
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/*enable screen saver*/
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window_manager_set_screen_saver_time(window_manager(), 180 * 1000);
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widget_on(window_manager(), EVT_SCREEN_SAVER, on_screen_saver, NULL);
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return show_preload_res_window();
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}
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```
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> 可以在XML设置window的fullscreen属性，让屏保窗口进入全屏状态。
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