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TreeCell Selection

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69737 Nov 9,2007 05:01 PM UTC Nov 9,2007 10:55 PM UTC WinForms 1
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Tags: GridControl
Qingde Shi
Asked On November 9, 2007 05:01 PM UTC

Hi,

In the Virtual TreeGrid example, How to enable selecting multiple cells starting from one of the TreeCells by holding mouse.

Thanks,

Q


haneefm [Syncfusion]
Replied On November 9, 2007 10:55 PM UTC

Hi Q,

You need to override the TreeCellRenderer's OnHitTest and OnClick method to solve this issue in a VitrualTreeGridControl. Below are the codes that shows this task.

protected override int OnHitTest(int rowIndex, int colIndex, MouseEventArgs e, IMouseController controller)
{
if(e.Button != MouseButtons.None )
{
return GridHitTestContext.None ;
}
else
return 0 ;
}

protected override void OnClick(int rowIndex, int colIndex, System.Windows.Forms.MouseEventArgs e)
{
//if you call ClickTreeNode here instead of OnMouseDown,
//then the action is done later after the mouseup...
ClickTreeNode(rowIndex, colIndex, e);
base.OnClick(rowIndex, colIndex, e);
return;
}

Here is a sample for reference.
VirtualTreeSelectionModified.zip

Best regards,
Haneef


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