如何使用 QAbstractTableModel(模型/视图)将数据设置到 QComboBox? [英] How to set data to QComboBox using QAbstractTableModel (Model/View)?
问题描述
我希望能够在使用 QAbstractTableModel
填充时设置 combobox
的 itemData
.但是,我只能从模型的 data
方法中返回一个字符串.
I wish to be able to set the itemData
of a combobox
when populated using a QAbstractTableModel
. However, I can only return one string from the model's data
method.
通常,当不使用模型时,可以这样执行:
Usually, when not using a model, this can be performed like so:
# Set text and data
combobox.addItem('Some text', 'some item data')
# Retrieve data from selected
item_data = combobox.itemData(combobox.currentIndex())
如何做到这一点,但使用QAbstractTableModel
?
我有一个 combobox
,我将模型设置为:
I have a combobox
, which I set a model to:
model = ProjectTableModel(projects)
combobox.setModel(model)
我的模型:
class ProjectTableModel(QtCore.QAbstractTableModel):
def __init__(self, projects=[], parent=None):
QtCore.QAbstractTableModel.__init__(self, parent)
self._projects = projects
def rowCount(self, parent):
return len(self._projects)
def columnCount(self, parent):
return 2
def data(self, index, role):
row = index.row()
column = index.column()
if role == QtCore.Qt.DisplayRole and column == 0:
project = self._projects[row]
name = project.name()
id = project.id() # <----- how to add this as itemData?
return name
推荐答案
QComboBox
总是 使用模型来存储其数据.如果您不自己设置模型,它将创建自己的QStandardItemModel
.addItem
和 itemData
等方法只需使用已设置的任何底层模型来存储和检索值.默认情况下,组合框使用 Qt.UserRole
在模型中存储项目数据.所以你的模型只需要做这样的事情:
A QComboBox
always uses a model to store its data. If you don't set a model yourself, it will create its own QStandardItemModel
. Methods such as addItem
and itemData
simply store and retrieve values using whatever underlying model has been set. By default, the combo-box uses the Qt.UserRole
to store item-data in the model. So your model just needs to do something like this:
def data(self, index, role):
row = index.row()
column = index.column()
if role == QtCore.Qt.DisplayRole and column == 0:
project = self._projects[row]
name = project.name()
return name
elif role == QtCore.Qt.UserRole and column == 0:
project = self._projects[row]
id = project.id()
return id
def setData(self, index, value, role):
row = index.row()
column = index.column()
if role == QtCore.Qt.UserData and column == 0:
project = self._projects[row]
project.setId(value) # or whatever
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