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Editorial Team
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Asked: 2026-05-30T08:51:37+00:00

I know how to draw shapes during a StringGrid.OnDrawCell event (by calling methods of

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I know how to draw shapes during a StringGrid.OnDrawCell event (by calling methods of a TCanvas object). When I do so, however, my UI constantly flickers and consumes memory as the draw event fires over and over.

The lines causing the flickering say things like ‘if [condition1 for a given cell=true] then [draw a red circle in the cell].’ (I can post the actual code, if desired.)

So, is it possible a custom method can do the same thing–tell a grid to draw a circle in a cell if a statement resolves to true?

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1 Answer

  1. Editorial Team

    If you haven’t already, set DoubleBuffered to true. This causes all of the drawing to be done on an off-screen bitmap, and then the entire bitmap is drawn at once. It usually eliminates the flickering.

    As far as custom methods to do the cell drawing, OnDrawCell is the custom method. 🙂

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