Databases
StackOverflow2013
Postsdbo
POPyQt QTreeWidget problem with custom delegate
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POPyQt QTreeWidget problem with custom delegate
    primarykey
    data
    text
    <p>I'm trying to write simple property editor. I have automatically generated pyqt class (WorkZone in the code below), and I need to view/edit some of it's properties with PropertyEditor, with the delegate PropertyEditorDelegate, that uses custom editors ColorEditor, LineEditor, etc.</p> <p>Main idea is that WorkZone knows what properties need to be edited and how, and PropertyEditor parse WorkZone, seek for such a properties, and fill QTreeWidget with their values.</p> <p>But there is a problem: delegate does not start editing on double click, or 'Enter', or smth. It is added to right row, it paints the item, but that's all. Additionally, when I switched Propertyeditor container's type to QTableWidget, delegate started to work more proper (but editor painted in the corner of the screen, not in the table)!</p> <p>PS. And one additional question: is there any way to add some delegates to rows without a need to store the instances of them somewhere else (self._delegates in a script), it is just UGLY. Method setItemDelegate accepts pointer to delegate, and in C++ it gets ownership on it, but in PyQT it is not so... Beside, there is no such problem with setItem, for example.</p> <p>Following script illustrates the problem:</p> <pre><code># -*- coding: utf-8 -*- #!/usr/bin/env python from PyQt4 import QtCore, QtGui import inspect class LineEditor(QtGui.QLineEdit): def __init__(self, name = None, parent = None, slot = None): QtGui.QLineEdit.__init__(self, parent) self.textChanged.connect(slot) self.name = name @staticmethod def paintForDelegate(delegate, painter, option, index): QtGui.QItemDelegate.paint(delegate, painter, option, index) def get(self): return str(self.text()) def set(self, val): self.setText(QtCore.QString.fromUtf8(val)) class ColorEditor(QtGui.QComboBox): def _populateList(self): for name in QtGui.QColor.colorNames(): self.addItem(name) index = self.findText(name) self.setItemData(index, QtGui.QColor(name), QtCore.Qt.DecorationRole) def __init__(self, name = None, parent = None, slot = None): QtGui.QComboBox.__init__(self, parent) self._populateList() self.currentIndexChanged.connect(slot) self.name = QtCore.QString.fromUtf8(name) @staticmethod def paintForDelegate(delegate, painter, option, index): QtGui.QItemDelegate.paint(delegate, painter, option, index) def get(self): qColor = QtGui.QColor(self.itemData(self.currentIndex(), QtCore.Qt.DecorationRole)) color = ((qColor.blue() | (qColor.green() &lt;&lt; 8)) | (qColor.red() &lt;&lt; 16)) return color def set(self, val): blue = (val &amp; 255) green = ((val &amp; 65280) &gt;&gt; 8) red = ((val &amp; 16711680) &gt;&gt; 16) color = QtGui.QColor(red, green, blue) index = self.findData(color, QtCore.Qt.DecorationRole) self.setCurrentIndex(index) class PropertyEditorDelegate(QtGui.QItemDelegate): def __init__(self, object, propName, parent = None): QtGui.QItemDelegate.__init__(self, parent) self._object = object self._propName = propName def paint(self, painter, option, index): self._object.paintForDelegate(self._propName, self, painter, option, index) def createEditor(self, parent, option, index): return self._object.createEditor(self._propName) def setEditorData(self, editor, index): value = index.model().data(index, QtCore.Qt.EditRole) editor.set(value) def setModelData(self, editor, model, index): if index.column() == 0: model.setData(index, editor.name, QtCore.Qt.EditRole) else: model.setData(index, editor.get(), QtCore.Qt.EditRole) def updateEditorGeometry(self, editor, option, index): editor.setGeometry(option.rect) class PropertyEditor(QtGui.QWidget): def __init__(self, parent = None): QtGui.QWidget.__init__(self, parent) self._object = None self._delegates = [] self._mainLayout = QtGui.QVBoxLayout() self._mainLayout.setContentsMargins(2, 2, 2, 2) self._mainLayout.setSpacing(2) self.setLayout(self._mainLayout) self._contents = QtGui.QTreeWidget() self._contents.setColumnCount(2) self._contents.currentItemChanged.connect(self.printCurrent) self._mainLayout.addWidget(self._contents) def printCurrent(self, curr, prev): print self._contents.currentIndex().row() print self._contents.currentIndex().column() print self._contents.itemDelegate(self._contents.currentIndex())._propName print self._contents.itemDelegate(self._contents.currentIndex()) def object(self): return self._object def setObject(self, value): self._object = value def isProperty(p): return isinstance(p, property) for (name, value) in inspect.getmembers(type(self._object), isProperty): if self._object.isEditable(name): item = QtGui.QTreeWidgetItem() item.setData(0, QtCore.Qt.EditRole, QtCore.QString.fromUtf8(self._object.getPropertyName(name))) item.setData(1, QtCore.Qt.EditRole, self._object.get(name)) self._contents.addTopLevelItem(item) self._delegates.append(PropertyEditorDelegate(self._object, name, self._contents)) index = self._contents.indexOfTopLevelItem(item) self._contents.setItemDelegateForRow(index, self._delegates[index]) class WorkZone(object): def __init__(self): self._name = '' self.currentEditor = None self.red = 100 self.green = 100 self.blue = 100 self._width = 1 def _getColor(self): color = ((self.blue | (self.green &lt;&lt; 8)) | (self.red &lt;&lt; 16)) return color def _setColor(self, color): self.blue = (color &amp; 255) self.green = ((color &amp; 65280) &gt;&gt; 8) self.red = ((color &amp; 16711680) &gt;&gt; 16) color = property(_getColor, _setColor) def currentColorChanged(self, index): if self.currentEditor is not None: self.color = self.currentEditor.get() print self.color def currentNameChanged(self, newName): if self.currentEditor is not None: self.name = self.currentEditor.get() print self.name def createEditor(self, prop): if prop == 'color': self.currentEditor = ColorEditor('Color', None, self.currentColorChanged) self.currentEditor.set(self.color) return self.currentEditor elif prop == 'name': self.currentEditor = LineEditor('Name', None, self.currentNameChanged) self.currentEditor.set(self.name) return self.currentEditor else: return None def releaseEditor(self): self.currentEditor = None def isEditable(self, prop): if prop == 'color': return True elif prop == 'name': return True else: return False def set(self, prop, val): if prop == 'color': self.color = val elif prop == 'name': self.name = val def get(self, prop): if prop == 'color': return self.color elif prop == 'name': return self.name def getPropertyName(self, prop): if prop == 'color': return 'Color' elif prop == 'name': return 'Name' def paintForDelegate(self, prop, delegate, painter, option, index): if prop == 'color': ColorEditor.paintForDelegate(delegate, painter, option, index) elif prop == 'name': LineEditor.paintForDelegate(delegate, painter, option, index) def _setWidth(self, Width): self._width = Width def _getWidth(self): return self._width width = property(_getWidth, _setWidth) def _getName(self): return self._name def _setName(self, val): self._name = val name = property(_getName, _setName) if __name__ == '__main__': import sys app = QtGui.QApplication(sys.argv) zone = WorkZone() zone.color = 0 zone.width = 1 propertyEditor = PropertyEditor() propertyEditor.setObject(zone) propertyEditor.show() sys.exit(app.exec_()) </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMaxim Popravko
    1. USMaxim Popravko
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POPyQt QTreeWidget problem with custom delegate
      1. USMorvern
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload