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Hello,

I’m sure this is an easy question for you : what’s the best method to be notified of mouse clicks in CExtReportGridWnd derived controls, AND know the corresponding row and column in the grid ?

Using OnGbwAnalyzeCellMouseClickEvent() virtual method gives a CPoint information : how can we deduce the corresponding row and column in the grid ?

Another idea : the ReportItemFocusGet() gives the CExtReportGridItem where the click was done. Is there and equivalent to retrieve the CExtReportGridColumn ?

Thanks in advance,

Christophe Guibert

The OnGbwAnalyzeCellMouseClickEvent() virtual method receives the CPoint point parameter which is the mouse click location in grid’s client coordinates. So, first of all we should convert it into zero based row/column numbers inside the grid window using hit-testing:

    CExtReportGridWnd * pReportGridWnd = . . .
    CExtGridHitTestInfo htInfo( point );
    pReportGridWnd->HitTest( htInfo, false, true );
    if(    htInfo.IsHoverEmpty()
        || ( ! htInfo.IsValidRect() )
        )
        return . . .;
    INT nColType = htInfo.GetInnerOuterTypeOfColumn();
    INT nRowType = htInfo.GetInnerOuterTypeOfRow();
    if( nColType != 0 || nRowType != 0 || htInfo.m_nColNo < 0 || htInfo.m_nRowNo < 0 )
        return . . .;

Now the htInfo.m_nColNo and htInfo.m_nRowNo values specify valid row/column numbers in terms of CExtGridWnd class. We should convert them into the CExtReportGridColumn * and CExtReportGridItem * pointers which are used by the CExtReportGridWnd class:

    CExtReportGridColumn * pRGC =
        STATIC_DOWNCAST(
            CExtReportGridColumn,
            pReportGridWnd->GridCellGetOuterAtTop( htInfo.m_nColNo, 0L )
            );
    HTREEITEM hTreeItem = pReportGridWnd->ItemGetByVisibleRowIndex( htInfo.m_nRowNo );
    CExtReportGridItem * pRGI = pReportGridWnd->ReportItemFromTreeItem( hTreeItem );
    ASSERT_VALID( pRGI );
    bool bReportItemIsGroupRow = ( pReportGridWnd->ItemGetChildCount( hTreeItem ) > 0 ) ? true : false;
    if( bReportItemIsGroupRow )
        return . . .; // WE THINK THIS IS NOT INTERESTING CASE
    CExtGridCell * pCell = pReportGridWnd->ReportItemGetCell( pRGC, pRGI );

Thank you very much : this was exactly what I was looking for.
Best Regards,
C. Guibert