B4J Question jFX Clipoard

miga · Aug 16, 2016

I'm working with jFX Clipboard and trying to paste an image from clipboard to imgeview. It works when am copying an image (jpg, png, etc), but Have a problem when I'm trying to copy/paste image from QTplayer or pdf file.
In these cases I cannot even save jpg, png, bmp file. The xnview can open it, but e.g.Photoshop cannot.
The files are somehow damage (its visible in xnview).
Then I tried this:

fx.Clipboard.SetImage(fx.Clipboard.GetImage)
...then paste to windows paint...

and realized that even this damage the images.

Am I doing something wrong?
Or is there other way how to use Clipboard (image) except of jFX?

Thanx

Erel · Aug 17, 2016

What is the value of fx.Clipboard.HasImage?

miga · Aug 18, 2016

Erel said:
What is the value of fx.Clipboard.HasImage?

TRUE
I'm checking it at begining of the Sub

miga · Aug 18, 2016

Attached is example:
- original - copied from pdf, pasted to photoshop, saved as jpg
- re-clipboard - copied from pdf, re-clipboarded over fx.Clipboard.SetImage(fx.Clipboard.GetImage), pasted to photoshop, saved as jpg

you can see different size, damaged colors
if I save this over:

out = File.OpenOutput("C:\temp", "tmp.jpg", False)
clipImage = fx.Clipboard.GetImage
clipImage.WriteToStream(out)

the result is jpg, that can be open in xnview but not in photoshop. I cannot even upload it here, because:

The contents of the uploaded image do not match the file's extension

So I uploaded zip file within the saved jpg (it seams it's not a jpg)
Filechecker said it's png, but even after renaming photoshop shows empty image.

Erel · Aug 18, 2016

miga said:
- re-clipboard - copied from pdf, re-clipboarded over fx.Clipboard.SetImage(fx.Clipboard.GetImage), pasted to photoshop, saved as jpg

What is the purpose of this step?

You haven't closed the outputstream so the file is not complete.

miga · Aug 18, 2016

Erel said:
What is the purpose of this step?

You haven't closed the outputstream so the file is not complete.

There is no purpose and i don't want to use it in my code. I just wanted to know where is the problem.
So it's just "check" whether content of clipboard, that went thru my code, is correct.

And of course last line of saving code is:
out.Close

sorry i didn't copy this line before

But again, all this happend only if I copy the image from pdf, QT player.
The images from any image viewer or from web sides works well.

thank you

Erel · Aug 19, 2016

The clipboard is handled by JavaFX engine. There is nothing that can be done if the image is not supported. It is not configurable.

miga · Aug 19, 2016

Thanx for answere.
Could you just check attached test?

Clipboard.zip - is small app that paste Clipboard image to an imageview and save it as png file (C:\temp)
Showcase_htm, pdf, mov - contain same image (pdf and mov are made from htm file)

Try to copy paste same image from htm, pdf, qtplayer to application.

html works
pdf and mov doesn't

Any idea why?

jmon · Aug 20, 2016

Strange indeed. Copying from QT, PDF or from Photoshop copied only a white image. It looks like it copied only the alpha of the image, and not the RGB.

I wanted to try with AWTRobot, but no success either, but not sure I did it properly:

B4X:

    If aw.ClipboardImageHas Then
        Dim str As InputStream
        str.InitializeFromBytesArray(aw.ClipboardImageGetAsByteArray, 0, aw.ClipboardImageGetAsByteArray.Length)
        Dim im As Image
        im.Initialize2(str)
        imageview1.SetImage(im)            ' insert into imageview
        str.Close

At least what you can do is write the image as a temp file, and load the image with fx.loadimage from your temp file...

jmon · Aug 20, 2016

For info, this code also produces the same result:

B4X:

Sub Paste_Action
    Dim clipboard As JavaObject
     clipboard.InitializeStatic("javafx.scene.input.Clipboard")
    Dim content As JavaObject = clipboard.RunMethod("getSystemClipboard", Null)
    If content.RunMethod("hasImage", Null) Then
        imageview1.SetImage(content.RunMethod("getImage", Null))
    End If
End Sub

miga · Aug 22, 2016

But when i save it over WriteToStream, it makes unreadible file. Check it in my app. It saves tmp.png in C:\temp

jmon · Aug 22, 2016

I could read the png file with no problem

miga · Aug 25, 2016

Even with my app? I'll check it again, when will be back from holiday. Thanx.

miga · Aug 29, 2016

jmon said:
I could read the png file with no problem

I can read only png from html. But not pdf nor mov. These looks like they are not propper png files. Only xnview can open it.
Neighter photoshop nor windows 10 photo viewver cannot open it.

I've tried pngTojpg library to convert saved png file to jpg with same result.
https://www.b4x.com/android/forum/threads/save-canvas-in-jpg.42839/#post-286094
From html image it was correct. From pdf and mov it created white jpg.

Something wrong is in Clipboard PASTE metod in B4J. Because to PASTE same Clipboard into Photoshop, Paint, etc is ok.

jmon · Aug 30, 2016

In this case, I think you should post a ticket directly on the Java page:
http://bugreport.java.com/

Because as Erel mentionned, this seems to be a Java / os related problem

B4J Question jFX Clipoard

miga

Member

Erel

B4X founder

miga

Member

miga

Member

Attachments

Erel

B4X founder

miga

Member

Erel

B4X founder

miga

Member

Attachments

jmon

Well-Known Member

jmon

Well-Known Member

miga

Member

jmon

Well-Known Member

miga

Member

miga

Member

jmon

Well-Known Member

Similar Threads

B4J Question jFX Clipoard

Member

B4X founder

Member

Member

Attachments

B4X founder

Member

B4X founder

Member

Attachments

Well-Known Member

Well-Known Member

Member

Well-Known Member

Member

Member

Well-Known Member

Similar Threads

Privacy & Transparency

Privacy & Transparency