pycrust-users

[PyCrust] clipboard destroyed on program exit

[Kevin A. <al...@se...>]

For a long time I've been annoyed that the clipboard appears to be destroyed
when exiting a PythonCard app when PyCrust is running. Until tonight I
didn't think to investigate this problem. This typically shows up for me
when I copy some text from the PyCrust shell and then exit the app and then
try and paste into Notepad or email only to find that the text is not in the
clipboard. If you do the copy/paste before the app exits, the text is okay.

Patrick thought I should bring this up here to see if Neil or Robin have any
ideas what causes this? Is there something in wxPython or Scintilla that is
messing with the clipboard when the app exits? I've never seen this issue
when copying text from a wxTextCtrl and then exiting an app, it only happens
with the PyCrust shell.

ka

Re: [PyCrust] clipboard destroyed on program exit

[Neil H. <ne...@sc...>]

Kevin:

> Patrick thought I should bring this up here to see if Neil or Robin have
> any ideas what causes this? Is there something in wxPython or
> Scintilla that is messing with the clipboard when the app exits? I've
> never seen this issue when copying text from a wxTextCtrl and
> then exiting an app, it only happens with the PyCrust shell.

   This is on Windows? On X/Linux this is hard to fix as you only provide
'promises' (in Mac terms) of your clipboard value. Then when another app
wants to paste, you are sent a message and you provide the full contents of
the clipboard. On Windows, you can either provide promises or data. The
reason for promises is the cost in rendering and storing the selection in
all possibly required formats when processing the copy/cut commands. Because
of this deep platform difference (and even worse, the asynchrony required on
X), Scintilla leaves it up to the platform adaptation layer to handle
clipboard operations. So it is up to Robin ;)

   Neil

RE: [PyCrust] clipboard destroyed on program exit

[Patrick K. O'B. <po...@or...>]

Here is how I have coded the cut and copy operations:

    def Cut(self):
        """Remove selection and place it on the clipboard."""
        if self.CanCut() and self.CanCopy():
            if self.AutoCompActive(): self.AutoCompCancel()
            if self.CallTipActive: self.CallTipCancel()
            self.Copy()
            self.ReplaceSelection('')

    def Copy(self):
        """Copy selection and place it on the clipboard."""
        if self.CanCopy():
            command = self.GetSelectedText()
            command = command.replace(os.linesep + sys.ps2, os.linesep)
            command = command.replace(os.linesep + sys.ps1, os.linesep)
            command = self.lstripPrompt(text=command)
            data = wxTextDataObject(command)
            if wxTheClipboard.Open():
                wxTheClipboard.SetData(data)
                wxTheClipboard.Close()

    def CopyWithPrompts(self):
        """Copy selection, including prompts, and place it on the
clipboard."""
        if self.CanCopy():
            command = self.GetSelectedText()
            data = wxTextDataObject(command)
            if wxTheClipboard.Open():
                wxTheClipboard.SetData(data)
                wxTheClipboard.Close()

---
Patrick K. O'Brien
Orbtech
"I am, therefore I think."

-----Original Message-----
From: pyc...@li...
[mailto:pyc...@li...]On Behalf Of Neil Hodgson
Sent: Monday, November 12, 2001 2:46 AM
To: Pycrust-Users
Subject: Re: [PyCrust] clipboard destroyed on program exit

Kevin:

> Patrick thought I should bring this up here to see if Neil or Robin have
> any ideas what causes this? Is there something in wxPython or
> Scintilla that is messing with the clipboard when the app exits? I've
> never seen this issue when copying text from a wxTextCtrl and
> then exiting an app, it only happens with the PyCrust shell.

   This is on Windows? On X/Linux this is hard to fix as you only provide
'promises' (in Mac terms) of your clipboard value. Then when another app
wants to paste, you are sent a message and you provide the full contents of
the clipboard. On Windows, you can either provide promises or data. The
reason for promises is the cost in rendering and storing the selection in
all possibly required formats when processing the copy/cut commands. Because
of this deep platform difference (and even worse, the asynchrony required on
X), Scintilla leaves it up to the platform adaptation layer to handle
clipboard operations. So it is up to Robin ;)

   Neil



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Re: [PyCrust] clipboard destroyed on program exit

[Robin D. <ro...@al...>]

I believe wxWindows uses the promise method.

--Robin

----- Original Message -----
From: "Patrick K. O'Brien" <po...@or...>
To: "Pycrust-Users" <pyc...@li...>
Sent: Monday, November 12, 2001 5:08 AM
Subject: RE: [PyCrust] clipboard destroyed on program exit


> Here is how I have coded the cut and copy operations:
>
>     def Cut(self):
>         """Remove selection and place it on the clipboard."""
>         if self.CanCut() and self.CanCopy():
>             if self.AutoCompActive(): self.AutoCompCancel()
>             if self.CallTipActive: self.CallTipCancel()
>             self.Copy()
>             self.ReplaceSelection('')
>
>     def Copy(self):
>         """Copy selection and place it on the clipboard."""
>         if self.CanCopy():
>             command = self.GetSelectedText()
>             command = command.replace(os.linesep + sys.ps2, os.linesep)
>             command = command.replace(os.linesep + sys.ps1, os.linesep)
>             command = self.lstripPrompt(text=command)
>             data = wxTextDataObject(command)
>             if wxTheClipboard.Open():
>                 wxTheClipboard.SetData(data)
>                 wxTheClipboard.Close()
>
>     def CopyWithPrompts(self):
>         """Copy selection, including prompts, and place it on the
> clipboard."""
>         if self.CanCopy():
>             command = self.GetSelectedText()
>             data = wxTextDataObject(command)
>             if wxTheClipboard.Open():
>                 wxTheClipboard.SetData(data)
>                 wxTheClipboard.Close()
>
> ---
> Patrick K. O'Brien
> Orbtech
> "I am, therefore I think."
>
> -----Original Message-----
> From: pyc...@li...
> [mailto:pyc...@li...]On Behalf Of Neil
Hodgson
> Sent: Monday, November 12, 2001 2:46 AM
> To: Pycrust-Users
> Subject: Re: [PyCrust] clipboard destroyed on program exit
>
> Kevin:
>
> > Patrick thought I should bring this up here to see if Neil or Robin have
> > any ideas what causes this? Is there something in wxPython or
> > Scintilla that is messing with the clipboard when the app exits? I've
> > never seen this issue when copying text from a wxTextCtrl and
> > then exiting an app, it only happens with the PyCrust shell.
>
>    This is on Windows? On X/Linux this is hard to fix as you only provide
> 'promises' (in Mac terms) of your clipboard value. Then when another app
> wants to paste, you are sent a message and you provide the full contents
of
> the clipboard. On Windows, you can either provide promises or data. The
> reason for promises is the cost in rendering and storing the selection in
> all possibly required formats when processing the copy/cut commands.
Because
> of this deep platform difference (and even worse, the asynchrony required
on
> X), Scintilla leaves it up to the platform adaptation layer to handle
> clipboard operations. So it is up to Robin ;)
>
>    Neil
>
>
>
> _______________________________________________
> PyCrust-users mailing list
> PyC...@li...
> https://lists.sourceforge.net/lists/listinfo/pycrust-users
>
>
> _______________________________________________
> PyCrust-users mailing list
> PyC...@li...
> https://lists.sourceforge.net/lists/listinfo/pycrust-users
>

RE: [PyCrust] clipboard destroyed on program exit

[Patrick K. O'B. <po...@or...>]

Is there any way to force wxPython to put the data on the clipboard, rather
than just a promise? This seems like something that should be decided by
each application, no?

---
Patrick K. O'Brien
Orbtech
"I am, therefore I think."

-----Original Message-----
From: pyc...@li...
[mailto:pyc...@li...]On Behalf Of Robin Dunn
Sent: Monday, November 12, 2001 10:09 AM
To: Pycrust-Users
Subject: Re: [PyCrust] clipboard destroyed on program exit

I believe wxWindows uses the promise method.

--Robin