用鼠标左键单击调色板上想要的颜色。
With the left mouse button, click the color you want on the Colors palette.
TrayIcon在鼠标左键单击时将触发actionevent，而在鼠标右击时则显示弹出菜单。
TrayIcon fires an ActionEvent on a single left mouse click and displays the pop-up menu on a single right mouse click.
通过左键单击、拖动鼠标动作可以移动地图，通过地图左上角的缩放控件能够改变地图的比例。
The map can be moved with a left-click, drag mouse action, and the scale can be changed with the zoom control in the upper left corner of the map.
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