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 ImageTopText/ImageInfoText/ImageBottomText in v6		  New Topic  Reply to Topic
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xequte

38615 Posts
Posted - Mar 14 2015 :  15:34:51  Show Profile  Reply
In v6.0.0 we have made a number of change to TImageEnMView to improve memory and resource usage. One in particular was overhauling the text handling. In prior versions TImageEnMView required three font objects for every frame (which was fine in 2002, but much less so in 2015 where a folder may contain tens of thousands of images).

Unfortunately this may means some changes for upgraders.

Fonts are now set on a global basis, so rather than setting:

ImageTopText[idx].Font use TopTextFont once
ImageInfoText[idx].Font use InfoTextFont once
ImageBottomText[idx].Font use BottomTextFont once

(If you need to customize the fonts for particular cells - and I have not heard of this being used - use TImageEnMView.OnGetTextEx instead)


Also text objects are now strings rather than classes so replace all references to

ImageTopText[idx].Caption with ImageTopText[idx]
ImageInfoText[idx].Caption with ImageInfoText[idx]
ImageBottomText[idx].Caption with ImageBottomText[idx]

(i.e. just remove the ".Caption")


For other changes, please see the compatibility notes at the end of:

http://www.imageen.com/info/HistoryFull.html#6.0.0

Nigel
Xequte Software
www.xequte.com
nigel@xequte.com

xequte

38615 Posts
Posted - Apr 06 2015 :  03:14:03  Show Profile  Reply
Hi

If you need to customize the styling of individual cells see the examples at:

http://www.imageen.com/help/TImageEnMView.OnGetTextEx.html

Old code:
ImageEnMView1.ImageTopText[ n ].Background := clYellow;


New code:
procedure TForm1.IEFolderMViewGetTextEx(Sender: TObject; Index: Integer; Position: TIEMTextPos; var Text: WideString;
                                        Font : TFont; var BackgroundStyle: TBrushStyle; var BackgroundColor: TColor;
                                        var TruncSide: TIEMTruncSide);
begin
  If ShouldHighlightThumb( Index ) then
    BackgroundColor := clYellow;
end;




Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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xequte

38615 Posts
Posted - Jun 30 2015 :  15:31:25  Show Profile  Reply
Hi

Another way to do the preceding would be to make use of the ImageTag or ImageUserPointer properties.

http://www.imageen.com/help/TImageEnMView.ImageTag.html
http://www.imageen.com/help/TImageEnMView.ImageUserPointer.html

To point to an entry in TList, Database, etc.

If you only need to store one color then simply use ImageTag as a color:


Appending:

  idx := AppendImage( SomeFile );
  If ShouldHighlightThumb( SomeFile ) then
    ImageEnMView1.ImageTag[ idx ] := Integer( clYellow )
  else
    ImageEnMView1.ImageTag[ idx ] := Integer( clWindowText );


Setting color:
procedure TForm1.IEFolderMViewGetTextEx(Sender: TObject; Index: Integer; Position: TIEMTextPos; var Text: WideString;
                                        Font : TFont; var BackgroundStyle: TBrushStyle; var BackgroundColor: TColor;
                                        var TruncSide: TIEMTruncSide);
begin
  BackgroundColor := TColor( ImageEnMView1.ImageTag[ Index] );
end;




Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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