Forum

Dear Support,

I have a grid which I override OnSiwPaintBackground and paint it in the dialog’s color:

void CMyGrid::OnSiwPaintBackground(CDC & dc,bool bFocusedControl) const
{
    ASSERT_VALID( this );
    CExtGridWnd::OnSiwPaintBackground( dc, bFocusedControl );

    CRect rcGridInner = OnSwGetClientRect();
    if( ! dc.RectVisible( &rcGridInner ) )
        return;

    bool bFillArea = true;
    if( g_PaintManager->GetCb2DbTransparentMode( (CWnd*)this ) )
    {
        if( g_PaintManager->PaintDockerBkgnd( true, dc, (CWnd*)this ) )
            bFillArea = false;
    } // if( g_PaintManager->GetCb2DbTransparentMode( (CWnd*)this ) )
    if( bFillArea )
    {
        COLORREF clrFill =
            g_PaintManager->GetColor( CExtPaintManager::CLR_3DFACE_OUT, (CObject*)this );
        dc.FillSolidRect( &rcGridInner, clrFill );
    } // if( bFillArea )
}

All works fine, until I set one of the check-boxes cells I have to disabled like this:

    pCell->ModifyStyle(__EGCS_READ_ONLY);

After this call, the background of the disabled cell returns to being white, which is not what I want.

Is this a bug? if not, what do I need to do so that the bakc color of this cell will not change when it’s read-only?

Thanks,

Ron.

You can invoke the CExtGridCell::TextColorSet() method for all your grid cells when you inserting them into the grid window. You should use the CExtGridCell::__ECS_READ_ONLY color type to change only the read-only text color of your grid cells. This is the first solution. The second solution is to implement the CExtGridCell::OnQueryTextColor() virtual method in your grid cell classes. The third and the most convenient solution is to implement the CExtGridWnd::OnGridCellQueryTextColor() virtual method in your grid control class. The CExtGridWnd::OnGridCellQueryTextColor() virtual method can return the COLORREF(-1L) value if you want the grid cell to compute its text color using default color selection algorithm. This virtual method should analyze whether the grid cell has the __EGCS_READ_ONLY cell style and return the desired text color for it.

I don’t understand why it works for normal cell, the background is painted with color function of CMyGrid::OnSiwPaintBackground, but when the cell is disabled it does not - why can’t I tell the cell to not paint its back-color in the same way it does not do it if the cell is not read-only?

Please implement the CExtScrollItemWnd::OnSiwGetReadOnlyBackgroundColor() virtual method and return the COLORREF(-1L) value from it.

Thanks, Problem solved...