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Forums » Prof-UIS General Discussion » How to apply color to CExtGridWnd background in area not covered by data row

Subject	Author	Date
How to apply color to CExtGridWnd background in area not covered by data row	Vitali Bounine	May 26, 2006 - 7:00 PM
The area between the last inner row and bottom outer row (footer).
Re:How to apply color to CExtGridWnd background in area not covered by data row	Technical Support	May 28, 2006 - 12:42 PM
You can draw any grid background in a `CExtGridWnd`-derived class by overriding the `CExtGridWnd::OnGbwEraseArea()` virtual method. If the `dwAreaFlags` parameter is set to `__EGBWA_INNER_CELLS`, the `rcArea` specifies the entire inner data cell area. Of course, you should detect whether you have any vertical space between the last row and `rcArea.bottom.` You can use the following code to get the last visible row and the bottom margin: CExtGridWnd * pGrid = ... if( pGrid->RowCountGet() == 0 \|\| pGrid->ColumnCountGet() == 0 ) return ... CRect rcVisibleRange = pGrid->OnSiwGetVisibleRange(); CRect rcCellAtBottom; if( ! pGrid->GridCellRectsGet( rcVisibleRange.left, rcVisibleRange.bottom, 0, 0, NULL, &rcCellAtBottom ) ) return ... Now you can detect the area you need: If( rcCellAtBottom.bottom >= rcArea.bottom ) // nowhere to paint return ... CRect rcAreaYouNeed( rcArea.left, rcCellAtBottom.bottom, rcArea.right, rcArea.bottom );