Re: [Pythoncard-users] XRC file support in PythonCard

[Winston W. <win...@st...>]

> There isn't a one-to-one match between the standard  wxWidgets/ 
> wxPython widget attributes ... The "command" attribute has no  
> equivalent in XRC.

Yes, the lack of a "command" parameter in an XRC file is a problem.

The more I fiddle with wxPython, the more I realize how nice  
PythonCard is, and how much time it saves.  Perhaps a better use of  
my effort would be to add Sizers into PythonCard.  Apple's Cocoa/ 
AppKit has the best sizers in my opinion.  What would be the  
technical hurdles of adding that to PythonCard?

-ww


On Apr 22, 2006, at 1:49 AM, Kevin Altis wrote:

>
> On Apr 19, 2006, at 2:34 PM, Winston Wolff wrote:
>
>> Is anybody thinking about integrating XRC files in PythonCard?
>>
>> Here are my reasons why it would be a good idea:
>> 	- Could use a number of GUI builders such as wxGlade.
>> 	- PythonCard's resourceEditor has problems including:
>> 		- on Mac OS X grow handles don't appear
>> 		- on Mac OS X sizes get "stuck" and I can't grow widgets
>> 		- Layouts/Sizers are not supported.
>>
>> I'm thinking about a resource loader in PythonCard that would load  
>> an .XRC file (XML file written out by wxGlade or XRCed) and then  
>> do the regular PythonCard magic for binding events to widgets.
>>
>> The great thing about PythonCard is how it links up widgets and  
>> handlers automatically, saving great amounts of time and  
>> simplifying your code.  Probably when it was first written,  
>> wxPython GUI editors were not very good, or didn't exist.  But now  
>> they are better than PythonCard's resourceEditor.  Let's leverage  
>> other's work on GUI editors, and take the good part from PythonCard.
>>
>> Would anybody use this?  Would I be allowed to add it to the  
>> sourceforge repository?  Any other technical issues?
>>
>> -Winston
>
> If all you really want is the auto-event binding that would be  
> relatively easy to separate from the rest of PythonCard. It could  
> even be done so that there isn't a central dispatcher if you don't  
> care about event tracing. What you would do is iterate over the  
> widgets after the XRC has been loaded. Dabo might be another tool  
> to look at.
>
> There isn't a one-to-one match between the standard  wxWidgets/ 
> wxPython widget attributes so at a minimum PythonCard would  
> probably need a custom XRC loader and some attributes that can be  
> set in the resourceEditor. For example, a wxButton in an XRC file  
> normally has the following possible attributes: XML ID, label,  
> default, pos, size, and style. In addition, it has the style  
> attributes: fg, bg, font, enabled, focused, hidden, tooltip. For  
> the most part the names are just different than what is used for  
> PythonCard so that is proably a simple translation. "XML ID" could  
> be treated as the PythonCard "name" attribute which is crucial for  
> event binding. The "command" attribute has no equivalent in XRC.
>
> Having PythonCard be able to support XRC files for resources that  
> follow some specific guidelines such as using XML ID as the "name"  
> probably wouldn't be that hard, though you might lose support for  
> some PythonCard attributes and/or wxWidget attributes that  
> PythonCard doesn't currently recognize. A module that was able to  
> load the XRC files directly would be preferable, but a conversion  
> tool would avoid requiring modification of the framework itself. If  
> the framework has to deal with it I suspect you would need to  
> "walk" the layout after it is loaded and translate between wxPython  
> attributes and PythonCard ones, doing GetXXX() method calls in most  
> cases.
>
> What is much more complicated and unlikely to happen is having the  
> resourceEditor be able to read and write generic XRC files. That  
> would be something to tackle after just being able to load was  
> implemented.
>
> ka
>
>
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