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reduce window flickering when doing many changes

Discussion in 'C' started by DavidB3, Mar 8, 2015.

  1. DavidB3

    DavidB3 New Member

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    Hi.

    I'm doing a small tool. I compile the code with gcc in MingW.

    One of its windows has a lot of normal controls on it (comboboxes, editboxes, textboxes, groupboxes...).
    I'm trying to reduce the window flickering (when modifying the controls) by using this code:

    Code:
    //button click event
    SetWindowRedraw(hWnd,FALSE);
    
    //do a lot of modifications (hide/show/move/edit controls with their repaint disabled)
    
    SetWindowRedraw(hWnd,TRUE);
    //here I get the rect of the update region
    RedrawWindow(hWnd, &updrect, 0, RDW_ERASE | RDW_INVALIDATE | RDW_FRAME | RDW_ALLCHILDREN | RDW_UPDATENOW);

    It flickers a little less, but it can be improved.
    Is there a way?

    I know about "double buffered", implemented in Delphi successfully but couldn't find a way in C.

    Thank you.

    Regards,
    David
     

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