PyQt - QTableView 中组合框的最简单工作示例 [英] PyQt - simplest working example of a combobox inside QTableView

问题描述

背景:我在 QTableView 中找不到组合框的完整工作示例.所以我根据其他几个更人为的例子编写了这段代码.然而，问题是，此示例要求您在组合框启用之前双击它，然后您必须再次单击以将其下拉.它不是很人性化.如果我使用 QTableWidget 执行非模型/视图操作，则组合框会在第一次点击时下拉.

Background: I cannot find a full working example of a combobox inside a QTableView. So I wrote this code based on several other more contrived examples out there. The problem is, however, that this example requires you to double-click on the combobox before it becomes enabled, then you have to click again to drop it down. It's not very user-friendly. If I do the non-model/view-thing using QTableWidget, the combobox drops down on the first click.

问题:有人可以看看这个并告诉我需要做什么才能使它像 QTableWidget 一样响应吗?此外，如果我正在做的任何事情是不必要的，也请指出.比如，是否一定要引用应用风格?

Question: Can someone look at this and tell me what needs to be done to make it respond just like QTableWidget? Also if there is anything that I'm doing that is unnecessary, please indicate that also. For example, is it absolutely necessary to reference the application style?

import sys
from PyQt4 import QtGui, QtCore

rows = "ABCD"
choices = ['apple', 'orange', 'banana']

class Delegate(QtGui.QItemDelegate):
    def __init__(self, owner, items):
        super(Delegate, self).__init__(owner)
        self.items = items
    def createEditor(self, parent, option, index):
        self.editor = QtGui.QComboBox(parent)
        self.editor.addItems(self.items)
        return self.editor
    def paint(self, painter, option, index):
        value = index.data(QtCore.Qt.DisplayRole).toString()
        style = QtGui.QApplication.style()
        opt = QtGui.QStyleOptionComboBox()
        opt.text = str(value)
        opt.rect = option.rect
        style.drawComplexControl(QtGui.QStyle.CC_ComboBox, opt, painter)
        QtGui.QItemDelegate.paint(self, painter, option, index)
    def setEditorData(self, editor, index):
        value = index.data(QtCore.Qt.DisplayRole).toString()
        num = self.items.index(value)
        editor.setCurrentIndex(num)
    def setModelData(self, editor, model, index):
        value = editor.currentText()
        model.setData(index, QtCore.Qt.DisplayRole, QtCore.QVariant(value))
    def updateEditorGeometry(self, editor, option, index):
        editor.setGeometry(option.rect)

class Model(QtCore.QAbstractTableModel):
    def __init__(self):
        super(Model, self).__init__()
        self.table = [[row, choices[0]] for row in rows]
    def rowCount(self, index=QtCore.QModelIndex()):
        return len(self.table)
    def columnCount(self, index=QtCore.QModelIndex()):
        return 2
    def flags(self, index):
        return QtCore.Qt.ItemIsEditable | QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable
    def data(self, index, role):
        if role == QtCore.Qt.DisplayRole:
            return self.table[index.row()][index.column()]
    def setData(self, index, role, value):
        if role == QtCore.Qt.DisplayRole:
            self.table[index.row()][index.column()] = value

class Main(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(Main, self).__init__(parent)
        self.model = Model()
        self.table = QtGui.QTableView()
        self.table.setModel(self.model)
        self.table.setItemDelegateForColumn(1, Delegate(self, ["apple", "orange", "banana"]))
        self.setCentralWidget(self.table)
        self.setWindowTitle('Delegate Test')
        self.show()

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    main = Main()
    app.exec_()

推荐答案

使用 QTableWiget.setCellWidget

import sys
from PyQt4 import QtGui
app = QtGui.QApplication(sys.argv)
table = QtGui.QTableWidget(1,1)
combobox = QtGui.QComboBox()
combobox.addItem("Combobox item")
table.setCellWidget(0,0, combobox)
table.show()
app.exec()

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