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 LoadFronFileOnDemand issue

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graph_man Posted - Oct 05 2020 : 14:11:55
Why when using LoadFromFileOnDemand
I often see a blue question marks instead of some thumbnails?
17   L A T E S T    R E P L I E S    (Newest First)
xequte Posted - Oct 15 2020 : 15:27:38
Yes, I used the same TIFF file. Can you try creating a simple demo with only the code above and see if you still see the issue?

Nigel
Xequte Software
www.imageen.com
graph_man Posted - Oct 15 2020 : 10:38:23
Did you use the file I sent to you?
xequte Posted - Oct 14 2020 : 22:15:32
Hi

I tried ietNormal and ietThumb. It didn't make a difference in my tests.

Nigel
Xequte Software
www.imageen.com
graph_man Posted - Oct 14 2020 : 09:06:13
StoreType = ietThumb ???
xequte Posted - Oct 14 2020 : 00:08:10
Hi

I added a TImageEnMView to a new project, added a button and added these events:


procedure TMainForm.Button1Click(Sender: TObject);
begin
  ImageEnMView1.SetModernStyling( True, 0, 0, False );
  ImageEnMView1.LoadFromFileOnDemand('d:\TestFile1.tif');
end;


procedure TMainForm.ImageEnMView1CreateParams(Sender: TObject; idx: Integer; Params: TIOParams);
var
  annotCount: Integer;
begin
  ImageEnMView1.ImageTopText[idx] := 'Page ' + IntToStr(idx + 1);

  annotCount := Params.ImagingAnnot.ObjectsCount + Params.ImageEnAnnot.ObjectsCount;
  if annotCount = 0 then
    ImageEnMView1.ImageInfoText[idx] := ''
  else
    ImageEnMView1.ImageInfoText[idx] := 'Annot.=' + IntToStr(annotCount);
end;


I could not reproduce any issue.

Nigel
Xequte Software
www.imageen.com
graph_man Posted - Oct 11 2020 : 17:31:43
void __fastcall TAFTV_FormMain::ImageEnMView2CreateParams(TObject *Sender, int idx,
TIOParams *Params)
{
ImageEnMView2->ImageTopText[idx] =
LangChanger1->TranslateMessage("Page") + " " + IntToStr(idx + 1);

int AnnotCount = Params->ImagingAnnot->ObjectsCount;
AnnotCount = AnnotCount + Params->ImageEnAnnot->ObjectsCount;

if (AnnotCount == 0)
{
ImageEnMView2->ImageInfoText[idx] = "";
}
else
{
ImageEnMView2->ImageInfoText[idx] = "Annot.=" + IntToStr(AnnotCount);
}
}
//---------------------------------------------------------------------------
xequte Posted - Oct 11 2020 : 17:07:26
Please show me your code.



Nigel
Xequte Software
www.imageen.com
graph_man Posted - Oct 10 2020 : 20:19:11
Why I see the blue question mark instead of ALL thumbnails at using OnCreateParams event?
graph_man Posted - Oct 10 2020 : 20:12:22
As said earlier:
I need to display one of the page parameters.

And this will significantly slow down the program.
You will have to iterate over ALL pages, not just the selected ones.
xequte Posted - Oct 10 2020 : 18:51:25
Hi

Use the Image*Text properties instead, e.g.

ImageEnMView1.LoadFromFileOnDemand('C:\input.mpeg');
for i := to ImageEnMView1.ImageCount - 1 do
  ImageEnMView1.ImageTopText[i] = 'Frame ' + IntToStr( i + 1 );


Nigel
Xequte Software
www.imageen.com
graph_man Posted - Oct 08 2020 : 16:29:59
A question mark appears when scrolling quickly. If you scroll very slowly through one thumbnail, then the mark appears very rarely.

I noticed one strange behavior.

I trying to use OnCreateParams event to add text ImageInfoText
(I need to display one of the page parameters)
and in this case ALL thumbnails with a question mark.
Why? How to fix it?

graph_man Posted - Oct 08 2020 : 06:43:13
I have sent it.
xequte Posted - Oct 08 2020 : 00:46:56
Please forward me a sample TIFF file that reproduces this.



Nigel
Xequte Software
www.imageen.com
graph_man Posted - Oct 07 2020 : 05:49:38
> What sort of file is it?

Multipage TIFF files.

> Does it happen only in your app or a simple demo too?

What simple demo I can to check this error. (I need StoreType = ietThumb)

> Is there any pattern to the failure?

There is not.
xequte Posted - Oct 06 2020 : 17:48:24
Hi

What sort of file is it?

Does it happen only in your app or a simple demo too?

Is there any pattern to the failure?

Nigel
Xequte Software
www.imageen.com
graph_man Posted - Oct 06 2020 : 17:12:56
I use "LoadFromFileOnDemand" command to load my file.
When scrolling, I see that not all thumbnail contain a real image, instead of them there is a blue question mark.
xequte Posted - Oct 06 2020 : 16:20:37
Hi

Can you give me more information to reproduce this?



Nigel
Xequte Software
www.imageen.com