[wxPython] wxImage

wxPython Users
1

There was talk on the lists last year about wxImage accepting an IO stream like the wxWindows. Has this happened and if not how can I best convert the JPEG stream from a server into a wxImage or bitmap in memory?

Nigel

2

----- Original Message

From: Nigel Moriarty

There was talk on the lists last year about wxImage accepting an IO stream like the wxWindows. Has this happened and if not how

can I best >convert the JPEG stream from a server into a wxImage or bitmap in memory?

Nigel

The version currently in CVS has it, although I have not tried it. Here's an excerpt from
the Demo. You have to d/l the CVS version from wxWindows website and build it, though.

···

#--------------------------------
Jeff Sasmor
jeff@sasmor.com

-----------------------------------------------------------

from wxPython.wx import *
from Main import opj

from cStringIO import StringIO

#----------------------------------------------------------------------

class TestPanel(wxPanel):
    def __init__(self, parent, log):
        wxPanel.__init__(self, parent, -1)

        data = open(opj('bitmaps/image.gif'), "rb").read()
        stream = StringIO(data)

        bmp = wxBitmapFromImage( wxImageFromStream( stream ))

        wxStaticText(self, -1,
                     "This image was loaded from a Python file-like object:",
                     (15, 15))
        wxStaticBitmap(self, -1, bmp, (15, 45))

#----------------------------------------------------------------------

def runTest(frame, nb, log):
    win = TestPanel(nb, log)
    return win

#----------------------------------------------------------------------

overview = """\
At long last there is finally a way to load any supported image type
directly from any Python file-like object, such as a memory buffer
using StringIO. """

3

Thanks for the prompt reply. I'll d/l forthwith.

···

----- Original Message -----
From: "Jeff Sasmor" <jsasmor@gte.net>
To: <wxpython-users@lists.wxwindows.org>
Sent: Friday, May 31, 2002 11:13 AM
Subject: Re: [wxPython] wxImage

----- Original Message

>From: Nigel Moriarty

>There was talk on the lists last year about wxImage accepting an IO

stream like the wxWindows. Has this happened and if not how

can I best >convert the JPEG stream from a server into a wxImage or bitmap

in memory?

>Nigel

The version currently in CVS has it, although I have not tried it. Here's

an excerpt from

the Demo. You have to d/l the CVS version from wxWindows website and build

it, though.

#--------------------------------
Jeff Sasmor
jeff@sasmor.com

-----------------------------------------------------------

from wxPython.wx import *
from Main import opj

from cStringIO import StringIO

#----------------------------------------------------------------------

class TestPanel(wxPanel):
    def __init__(self, parent, log):
        wxPanel.__init__(self, parent, -1)

        data = open(opj('bitmaps/image.gif'), "rb").read()
        stream = StringIO(data)

        bmp = wxBitmapFromImage( wxImageFromStream( stream ))

        wxStaticText(self, -1,
                     "This image was loaded from a Python file-like

object:",

                     (15, 15))
        wxStaticBitmap(self, -1, bmp, (15, 45))

#----------------------------------------------------------------------

def runTest(frame, nb, log):
    win = TestPanel(nb, log)
    return win

#----------------------------------------------------------------------

overview = """\
At long last there is finally a way to load any supported image type
directly from any Python file-like object, such as a memory buffer
using StringIO. """

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4

There was talk on the lists last year about wxImage accepting an
IO stream like the wxWindows. Has this happened and if not how
can I best convert the JPEG stream from a server into a wxImage
or bitmap in memory?

I recently tried

        img = wxBitmapFromImage(wxImageFromStream(file(r"C:\Steve\My
Pictures\bluespiral.png", "rb")))

and it worked fine. I was using 2.3.3pre3, haven't tested 2.3.2 for its
presence.

regards

···

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Steve Holden http://www.holdenweb.com/
Python Web Programming http://pydish.holdenweb.com/pwp/
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