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POMaintain Selection of QComboBox under a QStyledItemDelegate
 

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  1. POMaintain Selection of QComboBox under a QStyledItemDelegate
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    <p>Below is an example of a custom delegated <code>QComboBox</code>. When I make a selection, click out (or otherwise lose focus with the <code>QComboBox</code>), and then TAB back in (gain focus), I lose my original selection. For example, using the below code if I choose <code>"Item 2"</code>, click out, then TAB back in, the selection will go back to <code>"Item 1."</code></p> <p><strong>How can I maintain the selection?</strong></p> <p>I am assuming this issue occurs because I am using <code>addItem()</code> in <code>TheEditor</code> <code>QComboBox</code> class every time it is initialized except I am not too sure how I should be approaching this method. Should I instead be initalizing <code>TheEditor</code> in the <code>EditDelegate</code> <code>__ init __</code> class so that it is only initialized once and not every time it is focused? How might I do that properly?</p> <pre><code>import sys from PySide import QtCore, QtGui, QtSql class EditDelegate(QtGui.QStyledItemDelegate): def __init__(self, parent=None): super(EditDelegate, self).__init__(parent) def createEditor(self, parent, option, index): editor = TheEditor(parent) return editor class TheEditor(QtGui.QComboBox): def __init__(self, parent=None): super(TheEditor, self).__init__(parent) self.addItem("Item 1") self.addItem("Item 2") self.addItem("Item 3") self.setEditable(True) class TheTable(QtGui.QTableWidget): def __init__(self, columns, parent=None): super(TheTable, self).__init__(parent) self.setItemDelegate(EditDelegate()) self.setEditTriggers(QtGui.QAbstractItemView.AllEditTriggers) self.setColumnCount(1) self.setRowCount(1) self.setHorizontalHeaderLabels(["QCombo"]) class MainWindow(QtGui.QMainWindow): def __init__(self, parent=None): super(MainWindow, self).__init__(parent) self.setCentralWidget(TheTable(self)) if __name__ == '__main__': app = QtGui.QApplication(sys.argv) frame = MainWindow() frame.show() app.exec_() </code></pre> <p>Note: PySide v1.2.0</p>
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