pythoncard-users

[Pythoncard-users] Binding EVT_DROP_FILES to wxList

[Bill B. <bil...@pe...>]

I'm testing out adding drag and drop capabilities to my PythonCard app.
I'm looking to have files dropped onto a wxList.

So far I have code like this:

<code>
class FileDropTarget(wx.FileDropTarget):
     def __init__(self, obj):
         wx.FileDropTarget.__init__(self)
         self.obj = obj

     def OnDropFiles(self, x, y, filenames):
         [self.obj.Append(f) for f in filenames]
</code>

and then later (in my GUI class):

<code>
class GUI(model.Background):
     def on_initialize(self, event):
     self.fileList = self.components.fileList
     dropTarget = FileDropTarget(self.fileList)
     self.fileList.SetDropTarget(dropTarget)
</code>

The above works fine. I can drop the files on the wxList control and the
filenames are appended to the List.

Now, I need to know when files have been dropped on the List, so I added
this line (under on_initialize):

<code>
self.fileList.Bind(wx.EVT_DROP_FILES, self.on_fileList_DropFiles)
</code>

and then later (in my code) I have a method that looks like this:

<code>
def on_fileList_DropFiles(self, event):
     print 'files have been dropped'
</code>

When I drop files on the List, I can't seem to get the DROP_FILES event
to fire. IOW, my program never prints 'files have been dropped'.

Does anyone know what I'm doing wrong?

In case it matters, I'm also binding this event to the fileList:

<code>
self.fileList.Bind(wx.EVT_RIGHT_DOWN, self.on_fileList_RightDown)
</code>

and this event works fine.

Here's my specifications:
OS:             Windows 2000 Pro SP4
PythonCard:     0.8.1
Python:         2.4.1
wxPython:       2.6.1.0

Thanks,

Bill

Re: [Pythoncard-users] Binding EVT_DROP_FILES to wxList

[Bill B. <bil...@pe...>]

> <code>
> class GUI(model.Background):
>     def on_initialize(self, event):
>     self.fileList = self.components.fileList
>     dropTarget = FileDropTarget(self.fileList)
>     self.fileList.SetDropTarget(dropTarget)
> </code>
> 

Oops - The above didn't come out correctly. The code (properly indented 
looks like this:

<code>
class GUI(model.Background):
     def on_initialize(self, event):
         self.fileList = self.components.fileList
         dropTarget = FileDropTarget(self.fileList)
         self.fileList.SetDropTarget(dropTarget)
</code>

Bill

Re: [Pythoncard-users] Binding EVT_DROP_FILES to wxList

[Alex T. <al...@tw...>]

Bill Burns wrote:

> I'm testing out adding drag and drop capabilities to my PythonCard app.
> I'm looking to have files dropped onto a wxList.
>
> So far I have code like this:
>
> <snip>


> The above works fine. I can drop the files on the wxList control and the
> filenames are appended to the List.
>
> Now, I need to know when files have been dropped on the List, so I added
> this line (under on_initialize):
>
Why not simply do this in the OnDropFiles() function,
i.e.
<code>
class FileDropTarget(wx.FileDropTarget):
    def __init__(self, obj):
        wx.FileDropTarget.__init__(self)
        self.obj = obj

    def OnDropFiles(self, x, y, filenames):
        [self.obj.Append(f) for f in filenames]
        print "component", self.obj.name, "received files", filenames  
--- THIS
   
</code>

> When I drop files on the List, I can't seem to get the DROP_FILES event
> to fire. IOW, my program never prints 'files have been dropped'.
>
> Does anyone know what I'm doing wrong?
>
I don't.
However, I think the event mechanism for dropping is different from the 
usual one. If you could simply bind to EVT_DROP_FILES, then I think 
there'd be no need for the SetDropTarget complexity, would there?

However, I do know for sure that the above change works and prints out 
the name of the component on which they've been dropped, and  (just the 
new) file names on a drop event, so it can be used even if you have 
multiple drop targets.


-- 
Alex Tweedly       http://www.tweedly.net



-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.375 / Virus Database: 267.15.11/264 - Release Date: 17/02/2006

Re: [Pythoncard-users] Binding EVT_DROP_FILES to wxList

[Bill B. <bil...@pe...>]

[Alex  modifying Bill's code]
> Why not simply do this in the OnDropFiles() function,
> i.e.
> <code>
> class FileDropTarget(wx.FileDropTarget):
>    def __init__(self, obj):
>        wx.FileDropTarget.__init__(self)
>        self.obj = obj
> 
>    def OnDropFiles(self, x, y, filenames):
>        [self.obj.Append(f) for f in filenames]
>        print "component", self.obj.name, "received files", filenames  
> --- THIS
>   </code>
> 
[Bill]
>> When I drop files on the List, I can't seem to get the DROP_FILES event
>> to fire. IOW, my program never prints 'files have been dropped'.
>>
>> Does anyone know what I'm doing wrong?
>>
[Alex]
> I don't.
> However, I think the event mechanism for dropping is different from the 
> usual one. If you could simply bind to EVT_DROP_FILES, then I think 
> there'd be no need for the SetDropTarget complexity, would there?
> 
> However, I do know for sure that the above change works and prints out 
> the name of the component on which they've been dropped, and  (just the 
> new) file names on a drop event, so it can be used even if you have 
> multiple drop targets.

Alex,

Thank you for the reply!!

I'm just a python hobbyist which means - I'm not that good, yet :-)

I hadn't considered putting the 'print' statement in the OnDropFiles 
function. How simple!

BTW - I really don't want to print the names of the files. I was only 
using that as an example. I actually want to check:
1). If they're the type of files I want to accept (PDF & Tiff).
2). If the files are Landscape or Portrait.

So now (using your suggestion), I can simply do something like this:

<code>
def OnDropFiles(self, x, y, filenames):
	if checkTheseFiles(filenames):	
		[self.obj.Append(f) for f in filenames]
</code>

Where 'checkTheseFiles' is another function to maybe check the type and 
orientation. Although, I could check the file extension easily enough 
right within 'OnDropFiles'.

Thanks again for the help!!

Bill