[PyKDE] tableview and model

[Phil Thompson]

On Friday 24 February 2006 3:48 pm, Olivier Fournier wrote:
> Hello,
>
> I don't understand why this code is correct :
>
> # -*- coding: utf-8 -*-
>
> # Form implementation generated from reading ui file 'ftable.ui'
> #
> # Created: Fri Feb 24 16:38:19 2006
> #      by: PyQt4 UI code generator vsnapshot-20060221
> #
> # WARNING! All changes made in this file will be lost!
>
> import sys
> from PyQt4 import QtCore, QtGui
>
> class Ui_FTable(object):
>     def setupUi(self, FTable):
>         FTable.setObjectName("FTable")
>
> FTable.resize(QtCore.QSize(QtCore.QRect(0,0,400,300).size()).expandedTo(FTa
>ble.minimumSizeHint()))
>
>         self.gridlayout = QtGui.QGridLayout(FTable)
>         self.gridlayout.setMargin(9)
>         self.gridlayout.setSpacing(6)
>         self.gridlayout.setObjectName("gridlayout")
>
>         self.TVTable = QtGui.QTableView(FTable)
>         self.TVTable.setObjectName("TVTable")
>         self.gridlayout.addWidget(self.TVTable,0,0,1,1)
>
>         self.retranslateUi(FTable)
>         QtCore.QMetaObject.connectSlotsByName(FTable)
>
>     def tr(self, string):
>         return QtGui.QApplication.translate("FTable", string, None,
> QtGui.QApplication.UnicodeUTF8)
>
>     def retranslateUi(self, FTable):
>         FTable.setWindowTitle(self.tr("Form"))
>
> if __name__ == "__main__":
>     app = QtGui.QApplication(sys.argv)
>     FTable = QtGui.QWidget()
>     ui = Ui_FTable()
>     ui.setupUi(FTable)
>     ############################
>     model = QtGui.QStandardItemModel(3,3)
>     ui.TVTable.setModel(model)
>     ############################
>     FTable.show()
>     sys.exit(app.exec_())
>
>
> and why this code is incorrect: ( Exit with Signal 11 )
>
> # -*- coding: utf-8 -*-
>
> import sys
> from PyQt4 import QtGui, QtCore
> from ftable import Ui_FTable
>
> class FTable(Ui_FTable):
>     def __init__(self, Fenetre):
>         self.setupUi(Fenetre)
>
>         model = QtGui.QStandardItemModel(3,3)
>         self.TVTable.setModel(model)
>
>
> if __name__ == "__main__":
>     app = QtGui.QApplication(sys.argv)
>     Client = QtGui.QWidget()
>     ui = FTable(Fenetre=Client)
>     Client.show()
>     sys.exit(app.exec_())
>
> I use Python2.4 and the last sip and pyqt snapshot ( 20060221)
>
> I'll be happy you can help me!

Because setModel() doesn't take ownership of the model. In the first example 
model stays alive while it is being used. In the second it is garbage 
collected while it is still in use.

Phil