PyQt comes with a file called "modeltest.py" in the contrib directory
that is a huge help in developing & debugging your custom
QAbstractItemModel. It's tricky to write one correctly, and
modeltest.py runs it through a gauntlet of asserts to ensure that
everything is behaving as it should.
Ben
thirstydevil wrote:
> Tonight I tried to play with QT's QModel concept. It had stumped me
> for quite sometime at work today. I couldn't rest untill I had
> understood the basics. I'm not sure if this will be usefull to the
> hoi polloi but some may find it useful.
>
> Anyways, heres a listView using a QDirModel for reference.
> Oh, and for those that are python/Qt gurus please comment if I'm doing
> this the wrong way.
>
> -Cheers
> Dave
>
> ## ----------------------------------------------
>
> from PyQt4 import QtCore, QtGui
> import sys
> import os
>
> class UI(QtGui.QWidget):
> def __init__(self, parent=None):
> QtGui.QWidget.__init__(self, parent)
>
> self.setWindowTitle('listView ModelView Example')
> self.listView = MyListView()
> self.upButton = QtGui.QPushButton()
> self.upButton.setText("Up")
>
> grid = QtGui.QGridLayout()
> grid.addWidget(self.upButton)
> grid.addWidget(self.listView)
>
> self.setLayout(grid)
>
> self.resize(300, 150)
>
> items = self.listView.getModelItemCollection()
> print self.listView.DirModel.getData(items)
>
> self.connect(self.upButton, QtCore.SIGNAL("clicked()"),
> self._GoUp)
>
> def _GoUp(self):
> path = self.listView.DirModel.filePath(self.listView.rootIndex
> ())
> self.listView.setRootIndex(self.listView.DirModel.index
> ( os.path.dirname(str(path))))
>
> @staticmethod
> def Display():
> app = QtGui.QApplication(sys.argv)
> win = UI()
> win.show()
> sys.exit(app.exec_())
>
> class MyDirModel(QtGui.QDirModel):
> '''
> SubClass of QtGui.QDirmodel
> '''
> def __init__(self):
> super(MyDirModel, self).__init__()
>
> def getData(self, ModelIndex):
> '''
> Using QModelIndex I can get data via the data() method or
> via any other method that suport a QModelIndex
> '''
> paths = []
> if isinstance(ModelIndex, list):
> for items in ModelIndex:
> #print self.data(items).toString()
> paths.append(self.filePath(items))
> return paths
> else:
> raise ValueError("getData() requires a list
> (QtGui.QModelIndexs)")
>
> class MyListView(QtGui.QListView):
> '''
> SubClass of QtGui.QListView
> '''
>
> def __init__(self, parent = None):
> super(MyListView, self).__init__(parent)
> self.DirModel = MyDirModel()
> self.setModel(self.DirModel) # we have to set the listView to
> use this DirModel
> self.setRootIndex(self.DirModel.index("c://")) # set the
> deafault to load to c:\
>
> self.connect(self, QtCore.SIGNAL("doubleClicked
> (QModelIndex)"), self._DoubleClicked)
>
> def getModelItemCollection(self):
> '''
> From this list get the QModelIndex that we set
> with .setRootIndex
> Using QModelIndex and DirModel we can get all the elements at
> that Index
> '''
> ModelIndex = self.rootIndex()
> ModelIndexCollection = []
> for i in range(0, self.DirModel.rowCount(ModelIndex)):
> ModelIndexCollection.append(ModelIndex.child(i,0))
> return ModelIndexCollection
>
> def _DoubleClicked(self):
> if self.DirModel.isDir(self.currentIndex()):
> path = self.DirModel.filePath(self.currentIndex())
> self.setRootIndex(self.DirModel.index(path))
> items = self.getModelItemCollection()
> print self.DirModel.getData(items)
>
> if __name__ == "__main__":
> UI.Display()
>
>
> >
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