Loading ui files, addItems in QListWidgets

[sand...@gmail.com]

Hi Guys!

I'm trying to learn how to use ui files instead of converting the ui files to python all the time. I use Nathan's http://dl.dropboxusercontent.com/u/1633130/PyQt%20tuts/PySide_loadUiType.py (but import it as "uic")

# --------------- file called myAwesome.py

__uiFile__ = path/ui.ui

form_class, base_class = uic.loadUiType(__uiFile__)

class AweSome(form_class, base_class):

    def __init__(self, parent=None):

        super(AweSome, self).__init__(parent)

        self.setupUi(self)

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

import myAwesome
a = myAwesome.AweSome()
a.show()

So that works and I see my ui. And I can also connect signals to my buttons using

self.btnPressMe.connect.clicked(self.btnPressMe_clicked())

But how to I populate QListWidgets? I normally get a list using this command.

category = [folder for folder in os.listdir(self.ASSETPATH) if os.path.isdir(os.path.join(self.ASSETPATH,folder))]

and then use: self.categorys.addItems(category)

But how to I use the QtGui.QListWidget.addItems() command now that I import my ui file? Does it make sense? Sorry for the n00b quesiton about this.

regards
stefan andersson

[sand...@gmail.com]

never mind......

a = QtGui.QListWidget(self.listCategory.addItems(category))

Sorry for the noise

regards

stefan

[Fredrik Averpil]

If you like, you can check out my boilerplate which intends to load .ui files exactly the same way whether you are using PySide or PyQt. Also, it's prepared to run inside Maya, Nuke or as standalone.

https://github.com/fredrikaverpil/pyVFX-boilerplate

more info: https://github.com/fredrikaverpil/pyVFX-boilerplate/wiki

// Fredrik

[Justin Israel]

Hey Stefan,

Are you sure that is the right syntax to be using?

a = QtGui.QListWidget(self.listCategory.addItems( category))

This is adding your items to and existing list widget from your UI file, and then creating a new list widget with the None return value. This widget will then most likely be garbage collected after the function scope ends because it didn't have a parent.

It is effectively the same as writting:

self.listCategory.addItems(category)
a = QtGui.QListWidget(None)

Because addItems() doesn't return anything. Isn't the first line all you want? listCategory comes from the name you gave your list widget in Qt Designer.

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[Stefan Andersson]

Hey Justin!

The syntax isn't correct :) Though I figured it all out. I'm writing (or improving) a update for my mini-asset system that I have for projects. And being swedish I named it "meatball" :)

It's was quite tricky to find out how to use ui files directly, but I managed to convert everything and I must say it's a lot better and not have to convert the ui files to python code. It was a good sunday exercise and skimming through this group helped a lot of the way. Some of the not-yet-cleaned-up code (pasted below) looks like this. 

regards

stefan

#--- snip ---

from meatball.util import uic

__uiFile__ = os.path.join(os.path.dirname(__file__), "gather.ui")

form_class, base_class = uic.loadUiType(__uiFile__)

class GatherAsset(form_class, base_class):

    def __init__(self, parent=None):

        super(GatherAsset, self).__init__(parent)

        self.setupUi(self)

        self.projectAssets = os.environ["ASSETS"]

        category = [folder for folder in os.listdir(self. projectAssets) if os.path.isdir(os.path.join(self. projectAssets,folder))]

        category.sort(key=lambda v: v.upper())

        QtGui.QListWidget(self.listCategory.addItems(category))

        QtGui.QGroupBox(self.infoBoxProject.setTitle("Assets for Project: %s" % os.path.basename(os.environ["JOB"])))

        QtGui.QGroupBox(self.infoBoxAsset.setTitle("INFO:"))

        self.ui_signals()

    def ui_signals(self):

        self.btnGather.clicked.connect(self.on_btnGather_clicked)

        self.listCategory.itemClicked.connect(self.on_listCategory_clicked)

        self.listName.itemClicked.connect(self.on_listName_clicked)

        self.listVersions.itemClicked.connect(self.on_listVersions_clicked)

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--

Stefan Andersson | Digital Janitor

social media -> "sanders3d"

[Justin Israel]

I like Swedish meatballs. Its my favorite reason to go to IKEA.

Ya you are creating local qwidgets for no reason, using the None return value from the setters you are calling on the existing widgets

QtGui.QListWidget(self.listCategory.addItems(category))

QtGui.QGroupBox(self.infoBoxProject.setTitle("Assets for Project: %s" % os.path.basename(os.environ["JOB"])))

QtGui.QGroupBox(self.infoBoxAsset.setTitle("INFO:"))

Each one of those is just creating a widget with no parent that gets garbage collected after your constructor ends.

You just want:

self.listCategory.addItems(category)

self.infoBoxProject.setTitle("Assets for Project: %s" % os.path.basename(os.environ["JOB"]))

self.infoBoxAsset.setTitle("INFO:")

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[Stefan Andersson]

That's what I tried at first but that gave me errors (maya2014 osx). I'll give it a go again tomorrow.

Thanks for the tip.

Regards

Stefan

-- Sent from a phone booth in purgatory

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[Justin Israel]

If you post the errors you are getting from the fixed version, we can definitely debug it from there. 

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[Stefan Andersson]

Woke up and tried it, and of course you are right.... I have no idea of what I tested that didn't work out as it should.

Thanks for the heads up!

regards

stefan

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