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 ImageEn Library for Delphi, C++ and .Net
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 LoadFromFileOnDemand and Events		  New Topic  Reply to Topic
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graph_man

328 Posts
Posted - May 18 2015 :  17:53:27  Show Profile  Reply
I use LoadFromFileOnDemand and I need to perform certain actions when loading each page.
What event should I use?

w2m

USA
1990 Posts
Posted - May 18 2015 :  18:02:57  Show Profile  Reply
I believe you are looking for OnImageAdd.

Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development
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graph_man

328 Posts
Posted - May 18 2015 :  18:24:28  Show Profile  Reply
It doesn't work with my multipage file and this code

ImageEnMView2->LoadFromFileOnDemand(TempFileTiff, false);
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w2m

USA
1990 Posts
Posted - May 18 2015 :  18:28:00  Show Profile  Reply
What do you mean it does not work? OnImageAdd occurs whenever an image is added or when using TImageEnMView.FillFromDirectory as noted in the help file.

Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development
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graph_man

328 Posts
Posted - May 19 2015 :  04:40:37  Show Profile  Reply
I don't use
TImageEnMView.FillFromDirectory
I use
ImageEnMView2->LoadFromFileOnDemand(TempFileTiff, false);
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w2m

USA
1990 Posts
Posted - May 19 2015 :  15:49:13  Show Profile  Reply
I could be wrong of course, but I do not think there is an event that will execute that will allow processing a thumbnail frame bitmap when using LoadFromFileOnDemand. LoadFileOnDemand is mainly used for loading the frames of files with large number of frames (such as videos).


Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development
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graph_man

328 Posts
Posted - May 19 2015 :  16:26:22  Show Profile  Reply
It is a pity. I want this event to work with multi-page files.
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w2m

USA
1990 Posts
Posted - May 19 2015 :  16:29:38  Show Profile  Reply
It should work if you do not use LoadFromFileOnDemand. Try otherways to load the frames and put a break point in the event with a showmessage('I am in the xxx event') Not all of the events have a bitmap that you can process.

Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development
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xequte

39052 Posts
Posted - May 20 2015 :  00:35:33  Show Profile  Reply
Hi

Please advise what you are attempting to do, and I can advise the best way to do it.

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

328 Posts
Posted - May 20 2015 :  04:33:53  Show Profile  Reply
At loading images in the ImageEmMView I need to read some parameters (Params) and add them to "ImageInfoText"
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w2m

USA
1990 Posts
Posted - May 20 2015 :  10:25:03  Show Profile  Reply
I wish you had said that to begin with. I thought you wanted to process the bitmap. To add text to the frames use the GetText event.
procedure TForm1.ImageEnMView1GetText(Sender: TObject; Index: Integer;
  Position: TIEMTextPos; var Text: WideString);
var
  iBitDepth: Integer;
  iColor: string;
begin
  { Set the bottom text }
  ImageEnMView1.ImageBottomText[Index] := 'Frame ' + IntToStr(Index + 1);
  iBitDepth := ImageEnMView1.MIO.Params[Index].BitsPerSample *
    ImageEnMView1.MIO.Params[Index].SamplesPerPixel;
  if iBitDepth = 24 then
    iColor := 'RGBA 32-Bit'
  else
    iColor := 'RGB ' + IntToStr(iBitDepth) + '-Bit';
  { Set the info text }
  ImageEnMView1.ImageInfoText[Index] := iColor;
  ImageEnMView1.UpdateImage(Index);
  ImageEnMView1.Update;
end;

Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development
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graph_man

328 Posts
Posted - Jun 01 2015 :  19:48:29  Show Profile  Reply
I need an event that occurs once at frame (page) loading.
This event occurs continuously during redrawing.
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xequte

39052 Posts
Posted - Jun 04 2015 :  15:57:37  Show Profile  Reply
Hi

I'll see if we can add a relevant event for the next update.

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

39052 Posts
Posted - Jun 22 2015 :  18:21:54  Show Profile  Reply
In the next release you can use the OnImageLoaded event. Also, the OnAllDisplayed event occurs after loading completes for all images.

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

328 Posts
Posted - Jun 22 2015 :  18:29:20  Show Profile  Reply
Thanks
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