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30 lines
848 B
Markdown
30 lines
848 B
Markdown
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# 如何显示上下文菜单（俗称右键菜单）
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* 1.注册 EVT\_CONTEXT\_MENU 事件
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```c
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widget_on(win, EVT_CONTEXT_MENU, on_context_menu, win);
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```
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* 2.实现事件处理函数，在其中打开菜单窗口（建议用 popup 窗口）
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```c
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static ret_t on_context_menu(void* ctx, event_t* e) {
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pointer_event_t* evt = pointer_event_cast(e);
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widget_t* menu = popup_create(NULL, evt->x, evt->y, 128, 100);
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widget_t* b1 = button_create(menu, 2, 2, 124, 30);
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widget_t* b2 = button_create(menu, 2, 34, 124, 30);
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widget_t* b3 = button_create(menu, 2, 66, 124, 30);
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widget_set_text_utf8(b1, "Copy");
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widget_set_text_utf8(b2, "Paste");
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widget_set_text_utf8(b3, "Cut");
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popup_set_close_when_click(menu, TRUE);
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return RET_OK;
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}
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```
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* [完整例子](https://github.com/zlgopen/awtk-c-demos/blob/master/demos/context_menu.c)
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