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OnClick event swallowed

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30518 Jun 20,2005 05:01 AM Jun 20,2005 09:20 AM Windows Forms 2
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Tags: GridControl
Administrator [Syncfusion]
Asked On June 20, 2005 05:01 AM

I''ve implemented a custom TreeCell based on the sample Windows\Grid.Windows\Samples\In Depth\VirtTreeGrid GridControl.ListBoxSelectionMode = SelectionMode.MultiExtended, the TreeCellRenderer is derived from TextBoxCellRenderer, the indent of a treenode is viewed simply setting style.BorderMargins.Left and I paint the +- images before the TextBox''s left margin. Problem is, that clicking on the +- image doesn''t always trigger OnClick() event: if the row is selected, I must click 2 times but if I wait on the row, the cursor transforms to "mousearrow + rectangle" (denoting StartDrag???) and in this case I must click 3 times in order to have an OnClick() event. Help!

Administrator [Syncfusion]
Replied On June 20, 2005 05:52 AM

That sample uses the renderer.OnMouseDown to manage the click on the cell. Have you using that method to manage your +/- click?

Administrator [Syncfusion]
Replied On June 20, 2005 09:20 AM

No, the sample uses the OnMouseClick() event. OnMouseDown() is used for the right button (to view the context menu). (Interestingly for the left button the OnMouseDown() method won''t be called in the sample!) Now I''ve found that the Drag&Drop logic of GridControl swallows this event. If I (and the sample does it!) set Me.ControllerOptions = (Me.ControllerOptions And Not (GridControllerOptions.OleDataSource)) then everything worx fine!

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