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| EventHandler 显示为 expr,只要连接到 expr 的 |
| "MouseClicked" | 按下鼠标不动 | |
| {"MouseClicked",i} | 按下鼠标第 i 按钮不动 | |
| "MouseDown" | 按下鼠标主按钮 | |
| {"MouseDown",i} | 按下鼠标第 i 按钮 | |
| "MouseDragged" | 按下鼠标主按钮,鼠标移动 | |
| {"MouseDragged",i} | 按下鼠标第 i 按钮,鼠标移动 | |
| "MouseMoved" | 鼠标在 expr 定义的区域内移动 | |
| "MouseUp" | 释放鼠标主按钮 | |
| {"MouseUp",i} | 释放鼠标第 i 个按钮 |
| "KeyDown" | 按下键盘上的任意键 | |
| {"KeyDown","x"} | 按下 x 键 | |
| "ReturnKeyDown" | 按下 Return 或 Enter 键 | |
| "EscapeKeyDown" | 按下 Esc 键 | |
| "LeftArrowKeyDown" | 按下左箭头键 | |
| "RightArrowKeyDown" | 按下右箭头键 | |
| "UpArrowKeyDown" | 按下上箭头键 | |
| "DownArrowKeyDown" | 按下下箭头键 |
| PassEventsDown | Automatic | 是否把事件传送给内部事件处理程序 | |
| PassEventsUp | True | 是否把事件传送给外部事件处理程序 |