如何在组合框内创建树视图(带复选框) - PyQt [英] How do I create a tree view (with checkbox) inside a combo box - PyQt
问题描述
我正在使用 PYQT 来开发应用程序.我的要求是在组合框项目中插入一个带有复选框的树视图.我想知道如何实现这一目标?
I'm using PYQT for developing an application. my requirement is to insert a tree view with checkbox inside a combobox items. I would like to know how to achieve this?
我有以下代码,但这不起作用.
I have the following code but this does not work.
class CheckboxInsideListbox(QWidget):
def __init__(self, parent = None):
super(CheckboxInsideListbox, self).__init__(parent)
self.setGeometry(250,250,300,300)
self.MainUI()
def MainUI(self):
#stb_label = QLabel("Select STB\'s")
stb_combobox = QComboBox()
length = 10
cb_layout = QVBoxLayout(stb_combobox)
for i in range(length):
c = QCheckBox("STB %i" % i)
cb_layout.addWidget(c)
main_layout = QVBoxLayout()
main_layout.addWidget(stb_combobox)
main_layout.addLayout(cb_layout)
self.setLayout(main_layout)
如果我在这里遗漏了什么,请告诉我.
Please let me know if I'm missing anything here.
推荐答案
您应该创建一个模型,该模型支持 data 和 SetData 方法中的 Qt.CheckStateRole 以及 flags 方法中的标志 Qt.ItemIsUserCheckable.
You should create a model that support Qt.CheckStateRole in data and SetData methods and the flag Qt.ItemIsUserCheckable in the flags method.
我在这里粘贴一个我在项目中使用的示例,这是一个 QSortFilterProxyModel 通用实现,可在任何模型中使用,但您可以在模型实现中使用相同的想法,显然我在您拥有的这个子类中使用内部结构不是直接在 PyQt 中,而是附加到我的内部实现(self.booleanSet 和 self.readOnlySet).
I Paste you here an example i am using in a project, this is a QSortFilterProxyModel generic implementation to use in any model but you can use the same ideas in your model implementation, obviously i am using internal structures in this subclass you have not directly in PyQt and are attached to my internal implementation (self.booleanSet and self.readOnlySet).
def flags(self, index):
if not index.isValid():
return Qt.ItemIsEnabled
if index.column() in self.booleanSet:
return Qt.ItemIsUserCheckable | Qt.ItemIsSelectable | Qt.ItemIsEnabled
elif index.column() in self.readOnlySet:
return Qt.ItemIsSelectable | Qt.ItemIsEnabled
else:
return QSortFilterProxyModel.flags(self, index)
def data(self, index, role):
if not index.isValid():
return QVariant()
if index.column() in self.booleanSet and role in (Qt.CheckStateRole, Qt.DisplayRole):
if role == Qt.CheckStateRole:
value = QVariant(Qt.Checked) if index.data(Qt.EditRole).toBool() else QVariant(Qt.Unchecked)
return value
else: #if role == Qt.DisplayRole:
return QVariant()
else:
return QSortFilterProxyModel.data(self, index, role)
def setData(self, index, data, role):
if not index.isValid():
return False
if index.column() in self.booleanSet and role == Qt.CheckStateRole:
value = QVariant(True) if data.toInt()[0] == Qt.Checked else QVariant(False)
return QSortFilterProxyModel.setData(self, index, value, Qt.EditRole)
else:
return QSortFilterProxyModel.setData(self, index, data, role)
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