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 Topic  |
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graph_man
328 Posts |
 Posted - Oct 05 2020 : 14:11:55
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Why when using LoadFromFileOnDemand
I often see a blue question marks instead of some thumbnails? |
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xequte
38994 Posts |
Posted - Oct 06 2020 : 16:20:37
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Hi
Can you give me more information to reproduce this?
Nigel
Xequte Software
www.imageen.com
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graph_man
328 Posts |
Posted - Oct 06 2020 : 17:12:56
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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. |
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xequte
38994 Posts |
Posted - Oct 06 2020 : 17:48:24
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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
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graph_man
328 Posts |
Posted - Oct 07 2020 : 05:49:38
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> 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. |
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xequte
38994 Posts |
Posted - Oct 08 2020 : 00:46:56
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Please forward me a sample TIFF file that reproduces this.
Nigel
Xequte Software
www.imageen.com
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graph_man
328 Posts |
Posted - Oct 08 2020 : 06:43:13
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| I have sent it. |
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graph_man
328 Posts |
Posted - Oct 08 2020 : 16:29:59
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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?
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xequte
38994 Posts |
Posted - Oct 10 2020 : 18:51:25
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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
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graph_man
328 Posts |
Posted - Oct 10 2020 : 20:12:22
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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. |
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graph_man
328 Posts |
Posted - Oct 10 2020 : 20:19:11
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| Why I see the blue question mark instead of ALL thumbnails at using OnCreateParams event? |
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xequte
38994 Posts |
Posted - Oct 11 2020 : 17:07:26
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Please show me your code.
Nigel
Xequte Software
www.imageen.com
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graph_man
328 Posts |
Posted - Oct 11 2020 : 17:31:43
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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);
}
}
//--------------------------------------------------------------------------- |
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xequte
38994 Posts |
Posted - Oct 14 2020 : 00:08:10
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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
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graph_man
328 Posts |
Posted - Oct 14 2020 : 09:06:13
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| StoreType = ietThumb ??? |
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xequte
38994 Posts |
Posted - Oct 14 2020 : 22:15:32
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Hi
I tried ietNormal and ietThumb. It didn't make a difference in my tests.
Nigel
Xequte Software
www.imageen.com
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graph_man
328 Posts |
Posted - Oct 15 2020 : 10:38:23
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| Did you use the file I sent to you? |
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xequte
38994 Posts |
Posted - Oct 15 2020 : 15:27:38
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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
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LoadFronFileOnDemand issue
