pythoncard-users

[Pythoncard-users] Bitmap problem

[XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX]

Hello..I'm just getting into Pythoncard, so if any of my questions fall
into the categories of FAQ or RTFM, please don't hesitate to let me know...

I'm creating an application that mimics the output of a database report
writer, allowing the user to add extra notes that get stored along with
the "proper" data. To do this I want to display a bitmap - the sample one
to start is a little unusual - it's a 1000 x 630 pixels x 16-bit BMP
file. When I try to use this in the resource editor as a background I get:

wx.core.PyAssertionError: C++ assertion "wxAssertFailure" failed in
..\..\src\ms
w\dc.cpp(1024): invalid bitmap in wxDC::DrawBitmap

(this isn't the full traceback, but I have that if anyone's interested).

My first thought is that my bitmap is just too odd - would this be
correct? I've worked around the problem by using the same bitmap file in
an Image component (some questions on that to follow!)

Neil

Re: [Pythoncard-users] Bitmap problem

[Andy T. <an...@ha...>]

XXXXXXXXXXX wrote:
> Hello..I'm just getting into Pythoncard, so if any of my questions fall
> into the categories of FAQ or RTFM, please don't hesitate to let me know...
> 
> I'm creating an application that mimics the output of a database report
> writer, allowing the user to add extra notes that get stored along with
> the "proper" data. To do this I want to display a bitmap - the sample one
> to start is a little unusual - it's a 1000 x 630 pixels x 16-bit BMP
> file. When I try to use this in the resource editor as a background I get:
> 
> wx.core.PyAssertionError: C++ assertion "wxAssertFailure" failed in
> ..\..\src\ms
> w\dc.cpp(1024): invalid bitmap in wxDC::DrawBitmap
> 
> (this isn't the full traceback, but I have that if anyone's interested).
> 
> My first thought is that my bitmap is just too odd - would this be
> correct? I've worked around the problem by using the same bitmap file in
> an Image component (some questions on that to follow!)
> 
> Neil
> 
> 
> 
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It's a bit tricky to figure out what's going on without your code. 
Perhaps you could show us the method where you are loading up the bitmap.

Even better, a version of the minimal sample including your code and 
which shows the error would help the list subscribers to figure out what 
may be going wrong.

Regards,
Andy
-- 
--------------------------------------------------------------------------------
 From the desk of Andrew J Todd esq - http://www.halfcooked.com/

Re: [Pythoncard-users] Bitmap problem

[XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX]

On Sat, 7 Aug 2004 13:35:28 +0100, Andy Todd wrote:
>It's a bit tricky to figure out what's going on without your code. 
>Perhaps you could show us the method where you are loading up the bitmap.
>
>Even better, a version of the minimal sample including your code and 
>which shows the error would help the list subscribers to figure out what 
>may be going wrong.
>

The error's actually appearing in the console window for the resource
editor - I open the background info window and use the file browser
button for the "Image:" field, select the bitmap file and then try to
close the info window. Any redrawing of the resource window keeps
bringing up the error.

I just tried this on OSX and I get a dialog appearing with the following:
"Can't load image from file 'page1b.bmp': file does not exist.
no bitmap handler for type 1 defined"

This is with an existing project, or creating a new one and using the
resource editor 'wizard' to generate the necessary .rsrc.py file in while
case the background section looks like:
'backgrounds': [
    {'type':'Background',
     'name':'bgTemplate',
     'title':'Standard Template with File->Exit menu',
     'position':(267, 301),
     'size':(800, 600),
     'image':'page1b.bmp',
     'style':['resizeable'],

I decided to try out a 'safe' bitmap file of 640x480x8 bit (BMP and JPG)
but got the same issue.

Neil

Re: [Pythoncard-users] Bitmap problem

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

On Aug 6, 2004, at 3:31 PM, XXXXXXXXXXX wrote:

> Hello..I'm just getting into Pythoncard, so if any of my questions fall
> into the categories of FAQ or RTFM, please don't hesitate to let me  
> know...
>
> I'm creating an application that mimics the output of a database report
> writer, allowing the user to add extra notes that get stored along with
> the "proper" data. To do this I want to display a bitmap - the sample  
> one
> to start is a little unusual - it's a 1000 x 630 pixels x 16-bit BMP
> file. When I try to use this in the resource editor as a background I  
> get:
>
> wx.core.PyAssertionError: C++ assertion "wxAssertFailure" failed in
> ..\..\src\ms
> w\dc.cpp(1024): invalid bitmap in wxDC::DrawBitmap
>
> (this isn't the full traceback, but I have that if anyone's  
> interested).
>
> My first thought is that my bitmap is just too odd - would this be
> correct? I've worked around the problem by using the same bitmap file  
> in
> an Image component (some questions on that to follow!)
>
> Neil

There have been some wxWidget/wxPython bugs that could account for this  
problem, but neither of the ones I submitted below actually led to an  
assert.

http://sourceforge.net/tracker/? 
func=detail&aid=885104&group_id=9863&atid=109863

http://sourceforge.net/tracker/? 
func=detail&aid=909546&group_id=9863&atid=109863

If you want, you can wait for wxPython 2.5.2.3 to be released or try  
the wxPython-dev developer preview and see if it fixes the problem.

http://starship.python.net/crew/robind/wxPython/preview/2.5.2.3/

Of course, there could be a bug in PythonCard, but that sounds unlikely  
given the error you reported.

If the image can't be handled by wxWidgets, then I would like to get it  
from you, but don't email it to the list. Send me an email offlist with  
the size of the image and we'll figure out how to transfer it so I can  
reproduce the problem.

ka