Python PyQt:QDataWidgetMapper自定义属性映射
在PyQt中,我想使用QAbstractItemModel和QDataWidgetMapper将小部件映射到模型数据。 对于QLineEdit,它可以正常工作,但我希望在QButtonGroup(填充了几个QRadioButton)和模型之间有一个映射。 因此,我将QGroupBox子类化,并添加了一个自定义属性selectedOption:Python PyQt:QDataWidgetMapper自定义属性映射,python,pyqt,pyqt5,qabstractitemmodel,Python,Pyqt,Pyqt5,Qabstractitemmodel,在PyQt中,我想使用QAbstractItemModel和QDataWidgetMapper将小部件映射到模型数据。 对于QLineEdit,它可以正常工作,但我希望在QButtonGroup(填充了几个QRadioButton)和模型之间有一个映射。 因此,我将QGroupBox子类化,并添加了一个自定义属性selectedOption: class ButtonGroupWidget(QGroupBox): def __init__(self, parent=None):
class ButtonGroupWidget(QGroupBox):
def __init__(self, parent=None):
super(ButtonGroupWidget, self).__init__(parent)
self._selectedOption = -1
self.buttonGroup = QButtonGroup()
self.layoutGroupBox = QVBoxLayout(self)
def addRadioButton(self,optionText,optionId):
print(optionText)
radioButton = QRadioButton(optionText)
radioButton.clicked.connect(self.updateOptionSelected)
self.layoutGroupBox.addWidget(radioButton)
self.buttonGroup.addButton(radioButton,optionId)
def updateOptionSelected(self):
print(self.buttonGroup.checkedId()) # for test purpose
self.selectedOption = self.buttonGroup.checkedId()
print(self._selectedOption) # for test purpose
def getSelectedOption(self):
print("get selectedOption is called")
return self._selectedOption
def setSelectedOption(self,selectedOption):
print("set selectedOption is called")
self._selectedOption = selectedOption
self.buttonGroup.button(selectedOption).setChecked(True)
selectedOption = pyqtProperty(int,getSelectedOption,setSelectedOption)
在主窗口小部件中,我创建了此ButtonGroupWidget的一个实例:
class MainWidget(QWidget):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
...
# insert a button group widget
self.buttonGroupWidget1 = ButtonGroupWidget(self)
self.buttonGroupWidget1.setTitle("Select option")
self.buttonGroupWidget1.addRadioButton("Option 1", 1)
self.buttonGroupWidget1.addRadioButton("Option 2", 2)
self.buttonGroupWidget1.addRadioButton("Option 3", 3)
...
# Create the data model and map the model to the widgets.
self._model = DataModel()
...
self._dataMapper = QDataWidgetMapper()
self._dataMapper.setModel(self._model)
...
# mapping to custom property
self._dataMapper.addMapping(self.buttonGroupWidget1,1,"selectedOption")
下面给出了完整的代码(工作示例)。
我的问题如下:
如果更改了模型(例如,通过在完整代码中看到的lineEdit),将调用setSelectedOption方法并将self.\u selectedOption设置为当前值,并更新单选按钮。
但是如果我点击另一个单选按钮,我不知道如何更新模型
QWidget是否有类似于数据更改事件的事件,将更新模型
有没有更好的方法将QAbstractItemModel映射到具有多个单选按钮的GroupBox
完整代码(最少的示例,使用Python 3.4和PyQt 5.4测试):
导入系统
从PyQt5.qtwidts导入QWidget、QLineEdit、QRadioButton、QButtonGroup、QApplication、QVBoxLayout、QGroupBox、QTreeView、QDataWidgetMapper
从PyQt5.QtCore导入qabstracttemmodel、QModelIndex、Qt、pyqtProperty
“”“基类为树提供一些节点
目前,每个节点包含两个成员:名称和选项“”
类节点(对象):
def uuu init uuu(self,name,parent=None):
self.\u name=name
self._children=[]
self.\u parent=父
自选项=2
如果父项不是无:
parent.addChild(self)
def名称(自我):
返回self.\u name
def setName(自我,名称):
self.\u name=name
def选项(自):
返回自我。\u选项
def设置选项(自身,选项):
self.\u option=选项
def addChild(self,child):
self.\u children.append(child)
def insertChild(自身、位置、子项):
如果位置<0或位置>len(self.\u儿童):
返回错误
self.\u children.insert(位置,子对象)
孩子。_父母=自己
返回真值
def removeChild(自身,位置):
如果位置<0或位置>len(self.\u儿童):
返回错误
child=self.\u children.pop(位置)
子项。\u父项=无
返回真值
def子项(自身,行):
返回自我。\u子对象[行]
def儿童计数(自我):
返回len(自身儿童)
def父级(自我):
返回自我。\u家长
def行(自身):
如果self.\u parent不是None:
返回self.\u父项.\u子项索引(self)
定义报告(自我):
返回self.log()
类按钮组小部件(QGroupBox):
def uuu init uuu(self,parent=None):
super(按钮组小部件,self)。\uuuu init\uuuuu(父级)
self.\u selectedOption=-1
self.buttonGroup=QButtonGroup()
self.layoutGroupBox=QVBoxLayout(self)
def ADDRIOBUTTON(自身、optionText、optionId):
打印(optionText)
radioButton=QRadioButton(optionText)
radioButton.clicked.connect(self.updateOptionSelected)
self.layoutGroupBox.addWidget(radioButton)
self.buttonGroup.addButton(单选按钮,optionId)
def updateOptionSelected(自):
打印(self.buttonGroup.checkedId())#用于测试
self.selectedOption=self.buttonGroup.checkedd()
打印(自选选项)#用于测试
def getSelectedOption(自):
打印(“调用get selectedOption”)
返回自我。\u选择选项
def SETS SELECTED(自定义,SELECTED)选项:
打印(“调用设置选定选项”)
self.\u selectedOption=selectedOption
self.buttonGroup.button(selectedOption).setChecked(True)
selectedOption=pyqtProperty(int、getSelectedOption、setSelectedOption)
类数据模型(QAbstracteModel):
def uuu init uuu(self,parent=None):
超级(数据模型,自).\uuuu初始化\uuuuu(父级)
self.\u rootNode=节点(“根节点”)
childNode1=节点(“子节点1”,self.\u rootNode)
childNode2=节点(“子节点2”,self.\u rootNode)
childNode3=节点(“子3”,self.\u rootNode)
定义(自身、其他):
返回self.\uu dict.\uuu==其他.\uu dict__
def isNull(自身):
nullObject=DataModel()
如果self.\uuuuu eq\uuuuu(空对象):
返回真值
其他:
返回错误
def行数(自身、父级):
如果不是parent.isValid():
parentNode=self.\u rootNode
其他:
parentNode=parent.internalPointer()
返回parentNode.childCount()
def列数(自身、父项):
返回1
def数据(自身、索引、角色):
如果不是index.isValid():
一无所获
node=index.internalPointer()
如果角色==Qt.DisplayRole或角色==Qt.EditRole:
如果index.column()==0:
返回node.name()
如果index.column()==1:
返回node.option()
def setData(self、index、value、role=Qt.EditRole):
if index.isValid():
node=index.internalPointer()
如果角色==Qt.EditRole:
如果index.column()==0:
node.setName(值)
如果index.column()==1:
node.setOption(值)
self.dataChanged.emit(索引,索引)
返回真值
返回错误
def headerData(自身、部门、方向、角色):
如果角色==Qt.DisplayRole:
如果节==0:
返回“选择子对象”
def标志(自、索引):
返回Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsEditable
def父级(自我,索引):
node=index.internalPointer()
parentNode=node.parent()
如果parentNode==self.\u rootNode:
返回QModelIndex()
返回self.createIndex(parentNode.row(),0,parentNode)
def索引(自身、行、列、父项):
import sys
from PyQt5.QtWidgets import QWidget, QLineEdit, QRadioButton, QButtonGroup, QApplication, QVBoxLayout, QGroupBox, QTreeView,QDataWidgetMapper
from PyQt5.QtCore import QAbstractItemModel,QModelIndex,Qt,pyqtProperty
"""Base class to provide some nodes fro a tree
At the moment each node contains two members: name and option"""
class Node(object):
def __init__(self,name,parent=None):
self._name = name
self._children = []
self._parent = parent
self._option = 2
if parent is not None:
parent.addChild(self)
def name(self):
return self._name
def setName(self, name):
self._name = name
def option(self):
return self._option
def setOption(self,option):
self._option = option
def addChild(self,child):
self._children.append(child)
def insertChild(self, position, child):
if position < 0 or position > len(self._children):
return False
self._children.insert(position, child)
child._parent = self
return True
def removeChild(self, position):
if position < 0 or position > len(self._children):
return False
child = self._children.pop(position)
child._parent = None
return True
def child(self,row):
return self._children[row]
def childCount(self):
return len(self._children)
def parent(self):
return self._parent
def row(self):
if self._parent is not None:
return self._parent._children.index(self)
def __repr__(self):
return self.log()
class ButtonGroupWidget(QGroupBox):
def __init__(self, parent=None):
super(ButtonGroupWidget, self).__init__(parent)
self._selectedOption = -1
self.buttonGroup = QButtonGroup()
self.layoutGroupBox = QVBoxLayout(self)
def addRadioButton(self,optionText,optionId):
print(optionText)
radioButton = QRadioButton(optionText)
radioButton.clicked.connect(self.updateOptionSelected)
self.layoutGroupBox.addWidget(radioButton)
self.buttonGroup.addButton(radioButton,optionId)
def updateOptionSelected(self):
print(self.buttonGroup.checkedId()) # for test purpose
self.selectedOption = self.buttonGroup.checkedId()
print(self._selectedOption) # for test purpose
def getSelectedOption(self):
print("get selectedOption is called")
return self._selectedOption
def setSelectedOption(self,selectedOption):
print("set selectedOption is called")
self._selectedOption = selectedOption
self.buttonGroup.button(selectedOption).setChecked(True)
selectedOption = pyqtProperty(int,getSelectedOption,setSelectedOption)
class DataModel(QAbstractItemModel):
def __init__(self, parent=None):
super(DataModel, self).__init__(parent)
self._rootNode = Node("Root Node")
childNode1 = Node("Child 1",self._rootNode)
childNode2 = Node("Child 2",self._rootNode)
childNode3 = Node("Child 3",self._rootNode)
def __eq__(self, other):
return self.__dict__ == other.__dict__
def isNull(self):
nullObject = DataModel()
if self.__eq__(nullObject):
return True
else:
return False
def rowCount(self, parent):
if not parent.isValid():
parentNode = self._rootNode
else:
parentNode = parent.internalPointer()
return parentNode.childCount()
def columnCount(self, parent):
return 1
def data(self,index,role):
if not index.isValid():
return None
node = index.internalPointer()
if role == Qt.DisplayRole or role == Qt.EditRole:
if index.column() == 0:
return node.name()
if index.column() == 1:
return node.option()
def setData(self,index,value, role=Qt.EditRole):
if index.isValid():
node = index.internalPointer()
if role == Qt.EditRole:
if index.column() == 0:
node.setName(value)
if index.column() == 1:
node.setOption(value)
self.dataChanged.emit(index,index)
return True
return False
def headerData(self, section, orientation, role):
if role == Qt.DisplayRole:
if section == 0:
return "Select Child"
def flags(self, index):
return Qt.ItemIsEnabled | Qt.ItemIsSelectable | Qt.ItemIsEditable
def parent(self, index):
node = index.internalPointer()
parentNode = node.parent()
if parentNode == self._rootNode:
return QModelIndex()
return self.createIndex(parentNode.row(), 0, parentNode)
def index(self, row, column, parent):
if not parent.isValid():
parentNode = self._rootNode
else:
parentNode = parent.internalPointer()
childItem = parentNode.child(row)
if childItem:
return self.createIndex(row, column, childItem)
else:
return QModelIndex()
def getNode(self, index):
if index.isValid():
node = index.internalPointer()
if node:
return node
return self._rootNode
class MainWidget(QWidget):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
# define tree view
self.treeView = QTreeView(self)
# insert line edit
self.lineEdit1 = QLineEdit(self)
self.lineEdit2 = QLineEdit(self)
# insert a button group widget
self.buttonGroupWidget1 = ButtonGroupWidget(self)
self.buttonGroupWidget1.setTitle("Select option")
self.buttonGroupWidget1.addRadioButton("Option 1", 1)
self.buttonGroupWidget1.addRadioButton("Option 2", 2)
self.buttonGroupWidget1.addRadioButton("Option 3", 3)
layoutMain = QVBoxLayout(self)
layoutMain.addWidget(self.treeView)
layoutMain.addWidget(self.lineEdit1)
layoutMain.addWidget(self.lineEdit2)
layoutMain.addWidget(self.buttonGroupWidget1)
# Create the data model and map the model to the widgets.
self._model = DataModel()
self.treeView.setModel(self._model)
self._dataMapper = QDataWidgetMapper()
self._dataMapper.setModel(self._model)
# the mapping works fine for line edits and combo boxes
self._dataMapper.addMapping(self.lineEdit1, 0)
self._dataMapper.addMapping(self.lineEdit2, 1)
# mapping to custom property
self._dataMapper.addMapping(self.buttonGroupWidget1,1,"selectedOption")
self.treeView.selectionModel().currentChanged.connect(self.setSelection)
def setSelection(self, current):
parent = current.parent()
self._dataMapper.setRootIndex(parent)
self._dataMapper.setCurrentModelIndex(current)
def main():
app = QApplication(sys.argv)
form = MainWidget()
form.show()
app.exec_()
main()
def updateOptionSelected(self):
self.selectedOption = self.buttonGroup.checkedId()
QApplication.postEvent(
self, QKeyEvent(QEvent.KeyPress, Qt.Key_Enter, Qt.NoModifier))