获取知道其元素的QTableWidget行的索引 [英] Get the index of a QTableWidget row knowing its elements

问题描述

[我正在使用PyQt4，但是我认为这个Qt4问题不是Python特有的.]

[I'm using PyQt4, but I think this Qt4 issue is not Python specific.]

我有一个QTableWidget.在每一行中，第一列包含一个按钮.单击后，该行将被删除.

I have a QTableWidget. In each row, the first column holds a button. When clicked, the row is removed.

要删除该行，我使用removeRow(int row)方法，该方法将行的索引作为参数.连接信号时，我不知道行的索引，因为它同时可能会发生变化(例如，如果删除了第一行，则所有行的索引都会更改).

To remove the row, I use removeRow(int row) method, which takes as argument the index of the row. When connecting the signal, I can't know the index of the row because it might change in the meantime (for instance if the first row is removed, all row indexes are changed).

此处接受的答案建议在行中向回调函数传递QTableWidgetItem的实例，然后在删除时从该项目获取行号.

The accepted answer here suggests to pass the callback an instance of a QTableWidgetItem in the line, then get the row number from this item at deletion time.

这很好，除了该行的所有元素都不是QTableWidgetItem.元素是按钮本身和一些ComboBox.

This would be nice, except none of the elements of the row is a QTableWidgetItem. The elements are the button itself and a few ComboBoxes.

我想不出办法解决这个问题.

I can't figure out a way around this.

我可以以某种方式使我的元素之一适合QTableWidgetItem吗?我应该在某种隐藏列中添加QTableWidgetItem吗?

Can I somehow fit one of my elements into a QTableWidgetItem? Should I add a QTableWidgetItem in some sort of hidden column?

我们当前的实现使用indexAt(QtGui.qApp.focusWidget())(请参阅上面提到的问题的其他答案)，这对我来说似乎是一个遗憾的解决方法.

Our current implementation uses indexAt(QtGui.qApp.focusWidget()) (see other answer to question mentioned above), which looks like a sorry workaround to me.

如果我用这样的可检查QTableWidgetItem替换按钮

If I replace the button with a checkable QTableWidgetItem like this

rm_item = QtGui.QTableWidgetItem()
rm_item.setFlags(QtCore.Qt.ItemIsUserCheckable |
                 QtCore.Qt.ItemIsEnabled)

我有一个QTableWidgetItem，可以用来返回到行索引.但是我不知道如何像使用按钮一样从中捕获选中"或单击"事件.我发现的只是QTableWidget的itemClicked信号，但是随后我不得不过滤掉所有其他小部件.

I have a QTableWidgetItem I can use to get back to the row index. But I don't know how to catch a "checked" or "clicked" event from it like I do with the button. All I found is the itemClicked signal of QTableWidget, but then I'd have to filter all the other widgets out.

我必须缺少一些明显的东西.

There has to be something obvious I'm missing.

修改

根据我在此处所读的内容，我可以添加带有setItem的QTableWidgetItem和带有setCellWidget的Button窗口部件都位于同一单元格中.在我看来，这似乎并不自然，但显然可以(目前无法测试).

From what I read here, I could add both a QTableWidgetItem with setItem and a Button widget with setCellWidget to the same cell. This doesn't seem so natural to me, but apparently it works (can't test right now).

我想我会做的.添加按钮，并在同一单元格上添加一个伪QTableWidgetItem，以作为对该行的引用.

I guess I'll do that. Add the Button, plus a dummy QTableWidgetItem on the same cell to pass as a reference to the row.

这就是它的本意吗?

编辑2

或者也许QTableWidget不是正确的Widget，我应该使用Layout，如建议的此处.

Or maybe QTableWidget is not the proper Widget and I should be using a Layout, as suggested here.

推荐答案

看来，使用布局而不是表格可能是最正确"的答案，但正如我在答案中看到的那样，这可能会带来自身的困难.这个问题:

It seems that using a layout rather than a table is possibly the most "correct" answer, but that may come with it's own difficulties, as seen in my answer to this question:

• 如何从gridLayout删除小部件

如果您要继续使用表，比添加虚拟项目更干净的解决方案是使用永久模型索引:

If you want to continue using a table, a somewhat cleaner solution than adding dummy items would be to use a persistent model index:

            button = QtGui.QPushButton(text, self.table)
            self.table.setCellWidget(row, column, button)
            index = QtCore.QPersistentModelIndex(
                self.table.model().index(row, column))
            button.clicked.connect(
                lambda *args, index=index: self.handleButton(index))

    def handleButton(self, index):
        print('button clicked:', index.row())
        if index.isValid():
            self.table.removeRow(index.row())

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