PyQt5:为 QStandardItem 设置数据 [英] PyQt5: Setting data for a QStandardItem

问题描述

如果我像这样构造一个 QStandardItem:

If I construct a QStandardItem like so:

item = QtGui.QStandardItem('Item Name')

当此项目添加到 QStandardItemModel 模型并在 QTreeView 中查看时，我得到一个显示 Item Name 的单元格.但是，当我构建一个像:

When this item is added to a QStandardItemModel model and is viewed in a QTreeView I get a cell that says Item Name. However, when I construct one like:

item = QtGui.QStandardItem()
item.setData(123)

我得到一个空单元格，但我仍然可以通过调用来调用数据:

I get an an empty cell, but I can still recall the data by calling:

print(item.data())

我会得到数字123.如何让数字实际显示在单元格中?

and I will get the number 123. How can I get the number to actually display in the cell?

推荐答案

传递给 QStandardItem 构造函数的参数设置 DisplayRole.所以等效的方法是:

The argument passed to the QStandardItem constructor sets the data for the DisplayRole. So the equivalent method would be either:

item.setData(str(123), QtCore.Qt.DisplayRole)

或:

item.setText(str(123))

但如果你想以原始数据类型存储数据，而不是先将其转换为字符串，你可以使用 QStyledItemDelegate 来控制原始数据的显示方式:

But if you want to store the data in its orignal data-type, rather than converting it to a string first, you can use QStyledItemDelegate to control how the raw data is displayed:

class ItemDelegate(QStyledItemDelegate):
    def displayText(self, value, locale):
        if isinstance(value, float):
            return '%08f' % value
        return value

view.setItemDelegate(ItemDelegate(view))

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