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Combo box in TStringGrid?

Posted on 1997-04-12
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Last Modified: 2010-04-03
Is it possible have a combo box for certain columns of a TStringGrid? If not, what is another approach I can use to display a 'pick list' to the user within a TStringGrid?
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Question by:ChrisGin
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mheacock earned 50 total points
ID: 1335373
This is not really an 'easy' question, but I'll give it a shot.

I might put a special string in cells that would contain the pick grid, perhaps "<choose>".

When someone selected a cell with "<choose>" in it, you would unhide a combo box you have on your form and place it in the appropriate place on the grid and allow the user to choose a string.  This placing of the combo box would be a very involved procedure...doable, but difficult.

Second you would need a 2D array of TStringLists (or TLists) for the number of rows/columns in your grid...these lists would either be empty, or contain the pick lists for the appropriate cells.

Other than placing the ComboBox, this is probably the the simplest/best solution.  TStringGrid on its own will not support what you desire...you could take the TStringGrid source code and alter it to your desires to create a new TStringComboGrid component.
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by:ChrisGin
ID: 1335374
Hmm, that's a pity - I thought there might be an 'easy' way since  it is used extensively in Delphi's Object Inspector. Do you know how the Object Inspector was created?
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by:mheacock
ID: 1335375
I don't think the Object Inspector is a string grid.  It behaves and reacts differently to mouse clicks and selections.  It looks like a specially designed component.
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