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awtk/docs/how_to_show_context_menu.md
lixianjing 3d7a3b2462 add how_to_show_context_menu
2022-05-06 10:13:17 +08:00

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如何显示上下文菜单（俗称右键菜单）

  • 1.注册 EVT_CONTEXT_MENU 事件
widget_on(win, EVT_CONTEXT_MENU, on_context_menu, win);
  • 2.实现事件处理函数，在其中打开菜单窗口（建议用 popup 窗口）
static ret_t on_context_menu(void* ctx, event_t* e) {
  pointer_event_t* evt = pointer_event_cast(e);
  widget_t* menu = popup_create(NULL, evt->x, evt->y, 128, 100);
  widget_t* b1 = button_create(menu, 2, 2, 124, 30);
  widget_t* b2 = button_create(menu, 2, 34, 124, 30);
  widget_t* b3 = button_create(menu, 2, 66, 124, 30);

  widget_set_text_utf8(b1, "Copy");
  widget_set_text_utf8(b2, "Paste");
  widget_set_text_utf8(b3, "Cut");

  popup_set_close_when_click(menu, TRUE);

  return RET_OK;
}