Python 使用QsortFIlterProxymodel的惰性筛选QTreeview
我想用一个过滤器来扩展我之前提出的一个问题。在我的 我在惰性加载treeview方面得到了帮助,首先是父节点,只有在用户或多或少单击节点时才添加父节点的子节点,如下所示Python 使用QsortFIlterProxymodel的惰性筛选QTreeview,python,pyqt,pyqt4,qtreeview,qsortfilterproxymodel,Python,Pyqt,Pyqt4,Qtreeview,Qsortfilterproxymodel,我想用一个过滤器来扩展我之前提出的一个问题。在我的 我在惰性加载treeview方面得到了帮助,首先是父节点,只有在用户或多或少单击节点时才添加父节点的子节点,如下所示 from PyQt4 import QtGui class Widget(QtGui.QWidget): def __init__(self, parent=None): QtGui.QWidget.__init__(self, parent) self.mytreeview = Qt
from PyQt4 import QtGui
class Widget(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.mytreeview = QtGui.QTreeView(self)
self.setLayout(QtGui.QVBoxLayout())
self.layout().addWidget(self.mytreeview)
self.model = QtGui.QStandardItemModel(self.mytreeview)
self.mytreeview.setModel(self.model)
self.mytreeview.clicked.connect(self.update_model)
self.initialise_model()
def initialise_model(self):
for text in ["parent1", "parent2", "parent3"]:
item = QtGui.QStandardItem(text)
self.model.appendRow(item)
def update_model(self, index):
parent = self.model.itemFromIndex(index)
for text in ["children1", "children2", "children3"]:
children = QtGui.QStandardItem("{}_{}".format(parent.text(), text))
parent.appendRow(children)
self.mytreeview.expand(index)
proxyModel = QSortFilterProxyModel(treeView)
proxyModel.setSourceModel(self.model)
# set model
treeView.setModel(proxyModel);
treeView.setSortingEnabled(true)
def update_model(self, index):
parent = self.model.itemFromIndex(index)
##not sure about this now in the light of the proxyModel
for text in ["children1", "children2", "children3"]:
children = QtGui.QStandardItem("{}_{}".format(parent.text(), text))
parent.appendRow(children)
self.mytreeview.expand(index)#not sure about this either as the index is of the proxyModel
我现在想扩展并使用treeview的过滤器,以便用户可以键入父节点的名称,treeview将自己过滤到适当的相关节点。我仍然希望用户能够单击父节点,即使在过滤后,子节点也会添加到父节点
我如何调整以下内容以实现此目的?我已经按如下方式设置了树视图
from PyQt4 import QtGui
class Widget(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.mytreeview = QtGui.QTreeView(self)
self.setLayout(QtGui.QVBoxLayout())
self.layout().addWidget(self.mytreeview)
self.model = QtGui.QStandardItemModel(self.mytreeview)
self.mytreeview.setModel(self.model)
self.mytreeview.clicked.connect(self.update_model)
self.initialise_model()
def initialise_model(self):
for text in ["parent1", "parent2", "parent3"]:
item = QtGui.QStandardItem(text)
self.model.appendRow(item)
def update_model(self, index):
parent = self.model.itemFromIndex(index)
for text in ["children1", "children2", "children3"]:
children = QtGui.QStandardItem("{}_{}".format(parent.text(), text))
parent.appendRow(children)
self.mytreeview.expand(index)
proxyModel = QSortFilterProxyModel(treeView)
proxyModel.setSourceModel(self.model)
# set model
treeView.setModel(proxyModel);
treeView.setSortingEnabled(true)
def update_model(self, index):
parent = self.model.itemFromIndex(index)
##not sure about this now in the light of the proxyModel
for text in ["children1", "children2", "children3"]:
children = QtGui.QStandardItem("{}_{}".format(parent.text(), text))
parent.appendRow(children)
self.mytreeview.expand(index)#not sure about this either as the index is of the proxyModel
我有两个主要问题首先是proxyModel索引和源模型索引,我不确定这是如何工作的,而且在扩展单击的节点时,继承自
QAbstractProxyModel
的类作为QSortFilterProxyModel
具有mapToSource()
方法返回通过代理模型索引的源模型的索引,还有另一个名为mapFromSource()
的方法,该方法执行相反的操作,因此必须使用该方法才能将项添加到正确的模型中
为了过滤数据,我在连接textChanged
信号的地方添加了一个QLineEdit
,该文本提供我们用于过滤器的信号
class Widget(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.filterLe = QtGui.QLineEdit(self)
self.mytreeview = QtGui.QTreeView(self)
self.setLayout(QtGui.QVBoxLayout())
self.layout().addWidget(self.filterLe)
self.layout().addWidget(self.mytreeview)
self.model = QtGui.QStandardItemModel(self.mytreeview)
self.proxyModel = QtGui.QSortFilterProxyModel(self.mytreeview)
self.proxyModel.setSourceModel(self.model)
self.mytreeview.setSortingEnabled(True)
# set model
self.mytreeview.setModel(self.proxyModel)
self.mytreeview.clicked.connect(self.update_model)
self.filterLe.textChanged.connect(self.onTextChanged)
self.initialise_model()
@QtCore.pyqtSlot(str)
def onTextChanged(self, text):
self.proxyModel.setFilterRegExp(text)
def initialise_model(self):
for text in ["parent1", "parent2", "parent3"]:
item = QtGui.QStandardItem(text)
self.model.appendRow(item)
def update_model(self, index):
ix = self.proxyModel.mapToSource(index)
parent = self.model.itemFromIndex(ix)
for text in ["children1", "children2", "children3"]:
children = QtGui.QStandardItem("{}_{}".format(parent.text(), text))
parent.appendRow(children)
self.mytreeview.expand(index)
继承自
QAbstractProxyModel
asQSortFilterProxyModel
的类具有mapToSource()
方法,该方法返回通过代理模型索引的源模型索引,还具有另一个名为mapFromSource()的方法
这样做正好相反,因此您必须使用该方法才能将项目添加到正确的模型中
为了过滤数据,我在连接textChanged
信号的地方添加了一个QLineEdit
,该文本提供我们用于过滤器的信号
class Widget(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.filterLe = QtGui.QLineEdit(self)
self.mytreeview = QtGui.QTreeView(self)
self.setLayout(QtGui.QVBoxLayout())
self.layout().addWidget(self.filterLe)
self.layout().addWidget(self.mytreeview)
self.model = QtGui.QStandardItemModel(self.mytreeview)
self.proxyModel = QtGui.QSortFilterProxyModel(self.mytreeview)
self.proxyModel.setSourceModel(self.model)
self.mytreeview.setSortingEnabled(True)
# set model
self.mytreeview.setModel(self.proxyModel)
self.mytreeview.clicked.connect(self.update_model)
self.filterLe.textChanged.connect(self.onTextChanged)
self.initialise_model()
@QtCore.pyqtSlot(str)
def onTextChanged(self, text):
self.proxyModel.setFilterRegExp(text)
def initialise_model(self):
for text in ["parent1", "parent2", "parent3"]:
item = QtGui.QStandardItem(text)
self.model.appendRow(item)
def update_model(self, index):
ix = self.proxyModel.mapToSource(index)
parent = self.model.itemFromIndex(ix)
for text in ["children1", "children2", "children3"]:
children = QtGui.QStandardItem("{}_{}".format(parent.text(), text))
parent.appendRow(children)
self.mytreeview.expand(index)
它适用于子项吗?我使用相同的方法,但由于某些原因,当我在搜索字段中输入子项名称时,找不到它,但找到了父项ok@SergeyMaslovQSortFilterProxyModel仅适用于父项,如果要执行递归过滤,请使用recursiveFilteringEnabled,但它仅在PyQt 5.10中可用。它是否适用于子项?我使用相同的方法,但由于某些原因,当我在搜索字段中输入子项名称时,找不到它,但找到了父项ok@SergeyMaslovQSortFilterProxyModel仅适用于父级,如果要执行递归过滤,请使用recursiveFilteringEnabled,但它只能从PyQt 5.10中获得