[Interest] QTableView - auto check item when row is selected

[Frank Rueter | OHUfx]

Sending again as it didn't seem to hit the list the first time:

Hi all,

I'm writing a simple table view to display a selection of files 
available in a repository for the user to select for download.
Using the model/view approach I have set the item to isCheckable(True).
The one tweak in behaviour I am trying to introduce is that I'd like the 
checkboxes to auto-adjust according to the respective rows selection 
state, so that the user can drag over a bunch of rows to check the 
boxes, rather than having to click multiple times.
So I implemented the view's selectionChanged() virtual function to drive 
the checkboxes for the selected/deselected items.

This works perfectly fine, the only hiccup I'm seeing is that when 
clicking on an unchecked checkbox directly, it won't be checked the 
first time, only  the second time, when the respective row is selected 
as well, will the click cause the checkbox to be checked.
Interestingly, the culprit seems to be this block in selectionChanged():
         for i in selected.indexes():
             # this causes checkboxes to not be checked unless the 
respective row is selected
             item = self.model().itemFromIndex(i)
             item.setCheckState(Qt.Checked)


I also tried adding this to no avail:
         super(FileChoserView, self).selectionChanged(selected, deselected)


How can I fix this little glitch? Or should I be doing this in an 
entirely different way?
Below is the entire test code (raw and in pastebin link).

Thanks in advance for any advise,
frank




http://pastebin.com/T3tSgWRr


from PySide.QtGui import *
from PySide.QtCore import *


class FileModel(QStandardItemModel):

     def __init__(self, toolData, parent=None):
         super(FileModel, self).__init__(parent)
         self.containers = []
         self.headerLabels = ['file name']
         self.dataDict = toolData
         self.setUp()

     def setUp(self):
         '''fill model with data'''

         self.clear()
         for row, file_ in enumerate(self.dataDict['files']):
             fileItem = QStandardItem(file_['filename'])
             fileItem.setCheckable(True)
             font = QApplication.font()
             font.setPointSize(10)
             fileItem.setFont(font)
             self.setItem(row, 0, fileItem)

         self.setHorizontalHeaderLabels(self.headerLabels)


class FileChoserView(QTableView):

     def __init__(self, parent=None):
         super(FileChoserView, self).__init__(parent)
         self.setSortingEnabled(True)
         self.setEditTriggers(QAbstractItemView.NoEditTriggers)
         self.horizontalHeader().setStretchLastSection(True)
         self.setSelectionBehavior(QAbstractItemView.SelectRows)
         self.setContextMenuPolicy(Qt.ActionsContextMenu)
         horizontalHeader = self.horizontalHeader()
         self.verticalHeader().hide()

     def selectionChanged(self, selected, deselected):
         '''Check item when row is selected'''

         for i in selected.indexes():
             # this causes checkboxes to not be checked unless the 
respective row is selected
             self.model().itemFromIndex(i).setCheckState(Qt.Checked)

         for i in deselected.indexes():
self.model().itemFromIndex(i).setCheckState(Qt.Unchecked)


if __name__ == '__main__':
     import sys
     app = QApplication([])
     testData = {'files':[dict(filename='file_{}.zip'.format(i)) for i 
in xrange(10)]}

     w = FileChoserView()
     model = FileModel(testData)
     w.setModel(model)
     w.show()
     sys.exit(app.exec_())



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