Re: [Maya-Python] Customized display of files/folders in a QTreeView that is using QFileSystemModel.

[Justin Israel]

If your model is read-only, then it will be a lot less work and you don't
need to implement insertRow().
I can try to put together a simplified example of my own implementation
when I get back to work. It's a grouping proxy model that is meant to take
a table model and create a tree model with a virtual parent item for a
configured attribute of the items. As an example, one could say "group on
'category'" and then you would go from this:

ford, car
mazda, car
apple, food
banana, food

to this:

car
ford
mazda
food
apple
banana

I tried a quick search to see if there are existing examples, and maybe
these will give you some more info:
https://github.com/mpaperno/maxLibQt/blob/master/src/itemmodels/GroupedItemsProxyModel.cpp
https://sourceforge.net/p/qadvanceditemviews/code/ci/default/tree/qaivlib/qgroupingproxymodel.cpp

Justin


On Fri, Jun 14, 2019 at 10:25 PM HarshadB  wrote:

> Hi Justin, Thank you for the insight. It helped to know that
> theoretically I am going in the right direction.
> I tried quite a bit of things these last few days, a bit of a struggle
> since I am a bit new to the syntax and structure of Qt.
>
> At this point, I am stuck on adding an extra row using the
> QSortFilterProxyModel.
> I have attached the example code I am using to work on: Example
> 
>
> If I can get a successful empty row inserted, that would be a good start.
>
> - Harshad
> On Monday, June 10, 2019 at 8:11:48 PM UTC+9, Justin Israel wrote:
>>
>>
>>
>> On Mon, Jun 10, 2019, 8:22 PM HarshadB  wrote:
>>
>>> Need some help and direction in understanding QSortFilterProxyModel. I
>>> am creating a tool in Maya using PySide2 (Qt.py).
>>>
>>> *GOAL:*
>>> I have already built a filebrowser QTreeView with a QFileSystemModel.
>>> Folders and files are both displayed.
>>> I have a filter for files with a certain extension on the source model.
>>> (Maybe move this filter to proxy model..)
>>>
>>> The files are in this format:
>>>
>>> name.0001.ext
>>> name.0002.ext
>>> name.0003.ext
>>>
>>>
>>> What I want to do is, show the versions of a file in a treeView like
>>> this:
>>>
>>> - name (not an actual folder, virtual row I want to insert)
>>> --name.0001.ext
>>> --name.0002.ext
>>> --name.0003.ext
>>>
>>>
>>> So the intention is that QTreeView will always display the files with
>>> the names w/o versions. The user has to expand the name to see the version
>>> files.
>>> Further on I will implement something that imports the latest file when
>>> the "name" is operated on.
>>>
>>> *HELP:*
>>> I believe I can subclass QSortFilterProxyModel to do this. Is this right?
>>> Can someone enlighten me on how to go about it?
>>>
>>> Another options is to subclass QAbstractItemModel. I have yet to look
>>> deep into this.
>>> I would prefer QSortFilterProxyModel (based on what I have read). But
>>> suggestions are welcome.
>>>
>>> I will attach some code if required. I will have to extract it from my
>>> tool code.
>>> Thank you.
>>>
>>
>> QSortFilterProxyModel is likely where you want to start subclassing. The
>> other option is a QAbstractProxyModel, but that will require you to
>> implement more of the methods, whereas the former is already usable.
>> I've got use cases similar to what you subscribe, but it is a private
>> code base so unfortunately I have nothing to share. But I can try to offer
>> some high level advise for now and maybe some more detailed information
>> once I get a chance to look over my code again. But basically you have to
>> implement things like rowCount() to create a virtual new parent tier
>> which is your name without the versions. And stuff like hadChildren(),
>> index(), mapToSource(), and mapFromSource(), so that you can tell the
>> view that your virtual names have children and how to map them to the real
>> source index in the source model.
>> The nice thing about using proxy models is that your source model remains
>> the same and you can have multiple views to the same source with different
>> proxies in between that transform the data in a non-destructive way.
>>
>> - Justin
>>
>> --
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>>> 
>>> .
>>> For more options, visit https://groups.google.com/d/optout.
>>>
>> --
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Re: [Maya-Python] Getting RuntimeError when trying to use confirmDialog

[kiteh]

Tried with the use of QMessageBox, and it is working fine.
Initially I had thought this would work as I am calling the confirmDialog 
in frameEditied() (being first) and importRef() would be called on later..

Adding on, I tried to create the same prompt_dialog() in script editor, 
wrote 2 lines of code, each calling this method with different strings, and 
was given 2 confirm dialogs and hence the confusion. 

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Re: [Maya-Python] Customized display of files/folders in a QTreeView that is using QFileSystemModel.

[HarshadB]

Hi Justin, Thank you for the insight. It helped to know that 
theoretically I am going in the right direction.
I tried quite a bit of things these last few days, a bit of a struggle 
since I am a bit new to the syntax and structure of Qt.

At this point, I am stuck on adding an extra row using the 
QSortFilterProxyModel.
I have attached the example code I am using to work on: Example 


If I can get a successful empty row inserted, that would be a good start.

- Harshad
On Monday, June 10, 2019 at 8:11:48 PM UTC+9, Justin Israel wrote:
>
>
>
> On Mon, Jun 10, 2019, 8:22 PM HarshadB > 
> wrote:
>
>> Need some help and direction in understanding QSortFilterProxyModel. I am 
>> creating a tool in Maya using PySide2 (Qt.py).
>>
>> *GOAL:*
>> I have already built a filebrowser QTreeView with a QFileSystemModel. 
>> Folders and files are both displayed.
>> I have a filter for files with a certain extension on the source model. 
>> (Maybe move this filter to proxy model..)
>>
>> The files are in this format:
>>
>> name.0001.ext
>> name.0002.ext
>> name.0003.ext
>>
>>
>> What I want to do is, show the versions of a file in a treeView like this:
>>
>> - name (not an actual folder, virtual row I want to insert)
>> --name.0001.ext
>> --name.0002.ext
>> --name.0003.ext
>>
>>
>> So the intention is that QTreeView will always display the files with the 
>> names w/o versions. The user has to expand the name to see the version 
>> files.
>> Further on I will implement something that imports the latest file when 
>> the "name" is operated on.
>>
>> *HELP:*
>> I believe I can subclass QSortFilterProxyModel to do this. Is this right?
>> Can someone enlighten me on how to go about it?
>>
>> Another options is to subclass QAbstractItemModel. I have yet to look 
>> deep into this.
>> I would prefer QSortFilterProxyModel (based on what I have read). But 
>> suggestions are welcome.
>>
>> I will attach some code if required. I will have to extract it from my 
>> tool code. 
>> Thank you.
>>
>
> QSortFilterProxyModel is likely where you want to start subclassing. The 
> other option is a QAbstractProxyModel, but that will require you to 
> implement more of the methods, whereas the former is already usable. 
> I've got use cases similar to what you subscribe, but it is a private code 
> base so unfortunately I have nothing to share. But I can try to offer some 
> high level advise for now and maybe some more detailed information once I 
> get a chance to look over my code again. But basically you have to 
> implement things like rowCount() to create a virtual new parent tier which 
> is your name without the versions. And stuff like hadChildren(), index(), 
> mapToSource(), and mapFromSource(), so that you can tell the view that your 
> virtual names have children and how to map them to the real source index in 
> the source model. 
> The nice thing about using proxy models is that your source model remains 
> the same and you can have multiple views to the same source with different 
> proxies in between that transform the data in a non-destructive way. 
>
> - Justin 
>
> -- 
>> You received this message because you are subscribed to the Google Groups 
>> "Python Programming for Autodesk Maya" group.
>> To unsubscribe from this group and stop receiving emails from it, send an 
>> email to python_inside_maya+unsubscr...@googlegroups.com .
>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/python_inside_maya/df3e4b4a-69e1-432e-9fd9-0164463d8d57%40googlegroups.com
>>  
>> 
>> .
>> For more options, visit https://groups.google.com/d/optout.
>>
>

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