我正在尝试编写简单的属性编辑器。我已经自动生成了pyqt类(下面代码中的WorkZone),我需要使用PropertyEditor和委托PropertyEditorDelegate查看/编辑它的一些属性,它使用自定义编辑器ColorEditor、LineEditor等
主要思想是WorkZone知道需要编辑哪些属性以及如何编辑,PropertyEditor解析WorkZone,寻找这样的属性,并用它们的值填充QTreeWidget。在
但有一个问题:delegate不能在双击、Enter或smth时开始编辑。它被添加到右边的行中,它绘制项目,但仅此而已。 另外,当我将Propertyeditor容器的类型切换到QTableWidget时,delegate开始工作得更正常(但是编辑器绘制在屏幕的一角,而不是在表中)!在
另外还有一个问题:有没有什么方法可以在不需要将它们的实例存储到其他地方(self.\u delegates in a script)的情况下将一些委托添加到行中,这太难看了。方法SeTiMeTeMeTeAuto接受委托的指针,而在C++中,它得到所有权,但在PyQT却不是这样。另外,例如,setItem就没有这样的问题。在
以下脚本说明了该问题:
# -*- 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() << 8)) | (qColor.red() << 16))
return color
def set(self, val):
blue = (val & 255)
green = ((val & 65280) >> 8)
red = ((val & 16711680) >> 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 << 8)) | (self.red << 16))
return color
def _setColor(self, color):
self.blue = (color & 255)
self.green = ((color & 65280) >> 8)
self.red = ((color & 16711680) >> 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_())
答案很简单,一如既往。。%) QTreeWidgetItem的默认标志不包括QtCore.Qt.ItemIsEditable. 在
在PS上
来自PyQt的文档
在QAbstractItemView.setItemDelegate(自己,QabstractItem代表)
将此视图及其模型的项委托设置为委派。如果要完全控制项目的编辑和显示,这很有用。在
将删除任何现有委托,但不会删除。QAbstractItemView不拥有代理人的所有权。在
警告:不应在视图之间共享同一个委托实例。这样做可能会导致不正确或不直观的编辑行为,因为连接到给定代理的每个视图都可能收到closeEditor()信号,并尝试访问、修改或关闭已关闭的编辑器。在
最后,我处理了双击设置为可编辑的操作,使用editItem()强制项目进入编辑模式,然后将其设置回原来的状态。代理本身处理所有的显示和编辑。在
第一个setFlags可能只需要ItemIsEditable就可以工作了,但这感觉是对的。在
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