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How to get the text width in pixels when a component doesn't have a canvas Turn on/off line numbers in source code. Switch to Orginial background IDE or DSP color Comment or reply to this aritlce/tip for discussion. Bookmark this article to my favorite article(s). Print this article
12-Oct-02
Category
Graphic
Language
Delphi All Versions
Views
125
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Publisher:
DSP, Administrator
Reference URL:
DKB
			Author: Jonas Bilinkevicius

How to get the text width in pixels when a component doesn't have a canvas

Answer:

If a component doesn't have a Canvas property you can use the following function to 
get the text width based on the font passed.
1   
2   function GetTextWidth(CanvasOwner: TForm; Text: string; TextFont: TFont): Integer;
3   var
4     OldFont: TFont;
5   begin
6     OldFont := TFont.Create;
7     try
8       OldFont.Assign(CanvasOwner.Font);
9       CanvasOwner.Font.Assign(TextFont);
10      Result := CanvasOwner.Canvas.TextWidth(Text);
11      CanvasOwner.Font.Assign(OldFont);
12    finally
13      OldFont.Free;
14    end;
15  end;


			
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