Question

TwwDBGrid loses currency format.

Asked by: SurferJoe

The code sample changes the cell color for positive and negative currency amounts and works well.
However the currency formatting is lost, dollar signs and thousands separators are getting stripped off.
What is an elegant way to stop or fix this behavior? 

procedure TCostsf.wwDBGrid1DrawDataCell(Sender: TObject;
  const Rect: TRect; Field: TField; State: TGridDrawState);
begin
 
  with (Sender as TwwDBGrid), ClientDataSetCosts do begin
    if (Field.Value < 0) then
      Canvas.Brush.Color := 8421631
    else
      Canvas.Brush.Color := 8454016;
 
    Canvas.TextRect( rect, rect.left, rect.Top + 2, FieldByName( Field.FieldName).AsString);
 
  end;
end;

                                  
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Asked On
2009-05-26 at 11:54:36ID24439167
Topic

Delphi Programming

Participating Experts
3
Points
500
Comments
14

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Answers

 

by: SteveBayPosted on 2009-05-26 at 12:05:02ID: 24476374

Something like this:

Canvas.TextRect( rect, rect.left, rect.Top + 2, FormatCurr('0.00',FieldByName( Field.FieldName).AsFloat));

 

by: SurferJoePosted on 2009-05-26 at 12:16:41ID: 24476517

SteveBay,

Tried that,  doesnt  work.

Tried these Also;
   Canvas.TextRect( rect, rect.left, rect.Top + 2, Format('%.2f', [FieldByName(Field.FieldName).AsFloat]));
   Canvas.TextRect( rect, rect.left, rect.Top + 2, Format('%.2f', [FieldByName(Field.FieldName).asCurrency]))

This works for the formatting, but loses the color.
    Canvas.TextRect( rect, rect.left, rect.Top + 2, Format('%.2f', [FieldByName(Field.FieldName).Value]))

This is weird......

 

by: mikelittlewoodPosted on 2009-05-26 at 12:17:04ID: 24476522

or

Canvas.TextRect( rect, rect.left, rect.Top + 2, FieldByName( Field.FieldName).AsCurrency);

 

by: SteveBayPosted on 2009-05-26 at 12:37:21ID: 24476746

Mike,
 TField.AsCurrency does not return a string therefore your example would not compile.

Joe,
That is odd. Once you set brush color it should stay set until you change it. Why does .Value work while .AsFloat and .AsCurrency do not? What is the datatype?

 

by: SteveBayPosted on 2009-05-26 at 12:43:23ID: 24476810

Another thought:
Rather than using the ClientDataSetCosts.FieldByName have you tried just using:

Canvas.TextRect( rect, rect.left, rect.Top + 2, Format('%.2f', [Field.Value] ) );

I don't think it should make any difference but you never know...

 

by: SurferJoePosted on 2009-05-26 at 12:50:41ID: 24476896


This; Canvas.TextRect( rect, rect.left, rect.Top + 2, FieldByName( Field.FieldName).AsCurrency);
produces this; [Error] EstimatedWipCostsu.pas(213): Incompatible types: 'String' and 'Currency'

This formats the value correctly but loses the color;
Canvas.TextRect( rect, rect.left, rect.Top + 2, Format('%.2f', [Field.Value] ) );

 

by: SteveBayPosted on 2009-05-26 at 12:55:09ID: 24476937

>>  [Error] EstimatedWipCostsu.pas(213): Incompatible types: 'String' and 'Currency'
That's right. TextRect is looking for a string value in that parameter.
I still don't get the loss of color...

 

by: senadPosted on 2009-05-26 at 19:01:32ID: 24479438

why not just make cells currency type (field type currency) ?

 

by: SurferJoePosted on 2009-05-26 at 19:12:23ID: 24479467

senad:

That's the point, they are already (field type currency). Until the color is applied.

 

by: mikelittlewoodPosted on 2009-05-27 at 01:03:04ID: 24480716

Doh forgot that Steve. Guess it could just be wrapped inside a currToStr function too then.

 

by: SurferJoePosted on 2009-05-27 at 05:05:37ID: 24481991

Ok, got it from http://codenewsfast.com/isapi/isapi.dll/article?id=C9B3976D&article=7031968

Knew it had to be fairly simple;

procedure TEstimatedWipCostsf.wwDBGrid1CalcCellColors(Sender: TObject;
  Field: TField; State: TGridDrawState; Highlight: Boolean; AFont: TFont;
  ABrush: TBrush);
begin
  with (Sender as TwwDBGrid), cdsEstimatedWipCosts do begin
    if (Field.Value < 0) then
      ABrush.Color := 8421631
    else
      ABrush.Color := 8454016;
  end;
end;

                                              
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by: SteveBayPosted on 2009-05-27 at 05:49:20ID: 24482365

Ah, I see. You where using the wrong event. I never would have guessed that without installing the WW grid component and I'm already flush with grids that I don't use as it is.

 

by: mikelittlewoodPosted on 2009-05-27 at 05:52:24ID: 24482386

You could always change to use the virtual string tree/grid (cant remember its name) from soft gems.
That has a good tree search facility.

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