PyQt：QDataWidgetMapper 不显示小部件中的任何数据

Question

我有一个要映射到某些小部件的 AbstractItemModel。在 window 的构造函数中，我有：

    print("creating model")
    self.model = Model(self.cluster)
    print("creating mapper")
    self.mapper = QtGui.QDataWidgetMapper()
    print("setting model")
    self.mapper.setModel(self.model)
    print("setting root index")
    self.mapper.setRootIndex(self.model.root_index())
    print("setting index")
    self.mapper.setCurrentIndex(0)
    print("mapping widgets")
    self.mapper.addMapping(self.realNameLineEdit, 1)
    self.mapper.addMapping(self.emailLineEdit, 2)
    self.mapper.addMapping(self.infoPlainTextEdit, 3)
    print("done")

这导致以下输出：

creating model
Model.__init__()
Model.rowCount(<PySide.QtCore.QModelIndex(0,0,0x7faa2ff446a0,Model(0x17c6f50) )   at 0x7faa2d9ea4c8>) = 0
Model.rowCount(<PySide.QtCore.QModelIndex(0,0,0x7faa2ff446a0,Model(0x17c6f50) )   at 0x7faa2d9d2888>) = 1
creating mapper
setting model
setting root index
Model.root_index()
setting index
Model.rowCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2ff50d08>) = 2
Model.index(0, 0, <PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2ff50d08>)
Model.rowCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 2
Model.columnCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 4
mapping widgets
Model.index(0, 1, <PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2ff50d08>)
Model.rowCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 2
Model.columnCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 4
Model.index(0, 2, <PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2ff50d08>)
Model.rowCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 2
Model.columnCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 4
Model.index(0, 3, <PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2ff50d08>)
Model.rowCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 2
Model.columnCount(<PySide.QtCore.QModelIndex(-1,-1,0x0,QObject(0x0) )  at 0x7faa2d9ea608>) = 4
done

对我来说到目前为止看起来是正确的。但是 none 的映射小部件显示任何数据。 Model.data() 甚至根本没有被调用（我在那里也有打印）。

当我在 realNameLineEdit 中输入内容并按 return 时，我得到：

Model.setData(<PySide.QtCore.QModelIndex(0,1,0x7faa2da31908,Model(0x17c6f50) )   at 0x7faa2d9eadc8>, real name, 2)

看起来编辑通过映射器正确地到达了模型。那为什么不显示呢？

Answer 1

为了完整起见，从评论中复制： mapper.to First()、mapper.setCurrentIndex() 或类似内容必须在 之后调用 列映射以便映射显示任何数据。

PyQt：QDataWidgetMapper 不显示小部件中的任何数据

PyQt: QDataWidgetMapper doesn't show any data in widgets

pyqt

pyqt4

python-3.x