'宣言 Public Event BeforeMouseDown As BeforeMouseDownEventHandler
public event BeforeMouseDownEventHandler BeforeMouseDown
イベント データ
イベント ハンドラが、このイベントに関連するデータを含む、BeforeMouseDownEventArgs 型の引数を受け取りました。次の BeforeMouseDownEventArgs プロパティには、このイベントの固有の情報が記載されます。
| プロパティ | 解説 |
|---|---|
| Button | Gets which mouse button was pressed. |
| Cancel | Gets or sets a value indicating whether the event should be canceled. |
| Clicks | Gets the number of times the mouse button was pressed and released. |
| Delta | Gets a signed count of the number of detents the mouse wheel has rotated. A detent is one notch of the mouse wheel. |
| X | Gets the x-coordinate of a mouse click. |
| Y | Gets the y-coordinate of a mouse click. |
解説
This event fires before the grid processes the System.Windows.Forms.Control.MouseDown event, and gives the program a chance to customize the behavior of the control and optionally cancel the default handling of the mouse.
使用例
The code below handles the BeforeMouseDown event to detect clicks on row headers and provide OLE drag and drop functionality.
void _flex_BeforeMouseDown(object sender, BeforeMouseDownEventArgs e) { // start dragging when the user clicks the row headers HitTestInfo hti = _flex.HitTest(e.X, e.Y); if (hti.Type == HitTestTypeEnum.RowHeader) { e.Cancel = true; // cancel default handling HandleRowDragDrop(hti.Row); // handle row drag/drop } }
参照