Width in pixels of a text/caption in Delphi 7
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21-09-2019 - |
Question
Here is my problem, I want to know actual length of the text in pixels (note that various letters have different length in some fonts). I am going to use this for better column width adjustment in DBGrid.
Solution
You can use the Canvas.TextWidth
and Canvas.TextHeight
functions.
Option 1, using the canvas of the control
WidthInPixels := Label1.Canvas.TextWidth('My Text');
Option 2, creating a temporary canvas (using a Tbitmap)
Function GetWidthText(const Text:String; Font:TFont) : Integer;
var
LBmp: TBitmap;
begin
LBmp := TBitmap.Create;
try
LBmp.Canvas.Font := Font;
Result := LBmp.Canvas.TextWidth(Text);
finally
LBmp.Free;
end;
end;
OTHER TIPS
if you have a Delphi component has a "Canvas" property, then you can use Component.Canvas.TextWidth. For example: to get the width of the text of DBGrid you can use:
DBGrid1.Canvas.TextWidth('Stack');
Here you can find complete reference about this issue: Length of Delphi string in pixels
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