python - PyQt QTableWidget 检索编辑字段

Question

我对 PyQt 相当陌生，我正在 PyQt4 和 Python 2.7 中制作一个 GUI，它(除其他外)控制一些微 Controller 的设置。为了轻松填充和显示设置列表以及它们来自哪个 Controller ，我将其放入 QTableWidget 中，其中列是 Controller ，行是设置(所有 Controller 只是彼此重复，但并非所有设置都会 Controller 之间的值相同)。

我遇到的问题是，当用户编辑单元格时，我尝试获取新值

value = self.Settings1Table.item(n, s).text()

但这仅检索我在填充期间放入单元格中的值，而不是刚刚通过键盘输入的值。我已经阅读过有关方法 currentText() 的内容，但据我了解，这要求每个单元格都是自己的小部件，而且我不确定这是如何完成的。

整个代码相当大，我觉得没有必要完整地发布它，但如果需要更多代码，我很乐意提供。感谢您的帮助，我希望能够到来。

编辑:这是迭代表中每个项目的方法，它应该获取当前值，但现在只返回我通过 item.setText(str) 设置的值(需要是该值用户通过键盘输入)

def ApplyAll1(self):
    if not self.CheckHealth():
        for s in xrange(NumOfSegs):
            n = 0
            for item in Settings1List:
                value = self.Settings1Table.item(n, s).text()
                print value
    else:
        self.MsgCntrField.setText("CONNECTION ERROR")

self.CheckHealth() 只是错误检查

Answer 1

最后更新时间:2014 年 8 月 19 日 0 : 29

I don't really care about the event, since I am going to loop through the entire table, I do need the data changed by the keyboard instead of 'QtGui.QTableWidgetItem.setText' so yes

好的，可以先创建事件，然后仅创建键盘，但是您必须实现 QtGui.QTableWidget.focusInEvent(self, eventQFocusEvent) 和 QtGui.QTableWidget.focusOutEvent(self, eventQFocusEvent) 。因此，请参阅示例代码，希望有所帮助；

import sys
from PyQt4 import QtGui, QtCore

class QCustomTableWidget (QtGui.QTableWidget):
    def __init__ (self, parent = None):
        super(QCustomTableWidget, self).__init__(parent)
        self.focusKeyboardOn = False
        # Setup row & column data
        listsVerticalHeaderItem = ['Device 1', 'Device 2', 'Device 3', 'Device 4', 'Device 5']
        self.setRowCount(len(listsVerticalHeaderItem))
        for index in range(self.rowCount()):
            self.setVerticalHeaderItem(index, QtGui.QTableWidgetItem(listsVerticalHeaderItem[index]))
        listsVerticalHeaderItem = ['Device 1', 'Device 2', 'Device 3', 'Device 4']
        self.setColumnCount(5)
        listsHorizontalHeaderItem = ['Option 1', 'Option 2']
        self.setColumnCount(len(listsHorizontalHeaderItem))
        for index in range(self.columnCount()):
            self.setHorizontalHeaderItem(index, QtGui.QTableWidgetItem(listsHorizontalHeaderItem[index]))

    def dataChanged (self, topLeftQModelIndex, bottomRightQModelIndex):
        row                  = topLeftQModelIndex.row()
        column               = topLeftQModelIndex.column()
        dataQTableWidgetItem = self.item(row, column)
        if (self.currentItem() == dataQTableWidgetItem) and (self.focusKeyboardOn == True):
            self.emit(QtCore.SIGNAL('currentKeyboardDataChanged'), row, column, dataQTableWidgetItem)
        self.emit(QtCore.SIGNAL('dataChanged'), row, column, dataQTableWidgetItem)
        QtGui.QTableWidget.dataChanged(self, topLeftQModelIndex, bottomRightQModelIndex)

    def focusInEvent (self, eventQFocusEvent):
        self.focusKeyboardOn = False
        QtGui.QTableWidget.focusInEvent(self, eventQFocusEvent)

    def focusOutEvent (self, eventQFocusEvent):
        self.focusKeyboardOn = True
        QtGui.QTableWidget.focusOutEvent(self, eventQFocusEvent)

class QCustomWidget (QtGui.QWidget):
    def __init__(self, parent = None):
        super(QCustomWidget, self).__init__(parent)
        self.myQCustomTableWidget = QCustomTableWidget(self)
        self.myQLabel = QtGui.QLabel('Track edited data', self)
        myQVBoxLayout = QtGui.QVBoxLayout()
        myQVBoxLayout.addWidget(self.myQLabel)
        myQVBoxLayout.addWidget(self.myQCustomTableWidget)
        self.setLayout(myQVBoxLayout)
        self.connect(self.myQCustomTableWidget, QtCore.SIGNAL('currentKeyboardDataChanged'), self.setTrackData)
        self.myQCustomTableWidget.setItem(0, 0, QtGui.QTableWidgetItem('Test'))
        self.myQCustomTableWidget.setItem(1, 1, QtGui.QTableWidgetItem('Work'))

    def setTrackData (self, row, column, dataQTableWidgetItem):
        self.myQLabel.setText('Last updated\nRow : %d, Column : %d, Data : %s' % (row + 1, column + 1, str(dataQTableWidgetItem.text())))

if __name__ == '__main__':
    myQApplication = QtGui.QApplication(sys.argv)
    myQCustomWidget = QCustomWidget()
    myQCustomWidget.show()
    sys.exit(myQApplication.exec_())

注意:有 1 个情况会出现 BUG:如果您在通过键盘进行编辑时通过“QtGui.QTableWidgetItem.setText”进行设置。但如果你的情况严格，我建议创建你自己的小部件并设置你自己的项目委托(delegate)。 (但是，非常硬核...)

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我不知道你的单元格中的数据是什么。 (这是另一个自定义QWidget，或者只是普通数据QTableWidgetItem)

无论如何，当用户编辑单元格时，您尝试使用此方法 QAbstractItemView.dataChanged (self, QModelIndex topLeft, QModelIndex BottomRight) 获取新值。此方法返回已编辑的数据位置，并使用QTableWidgetItem QTableWidget.item (self, int row, int column)从索引获取数据。 (这就是你所说的问题)但是这项工作仅编辑已关闭(不在编辑期间)。

示例；

import sys
from PyQt4 import QtGui, QtCore

class QCustomTableWidget (QtGui.QTableWidget):
    def __init__ (self, parent = None):
        super(QCustomTableWidget, self).__init__(parent)
        # Setup row & column data
        listsVerticalHeaderItem = ['Device 1', 'Device 2', 'Device 3', 'Device 4', 'Device 5']
        self.setRowCount(len(listsVerticalHeaderItem))
        for index in range(self.rowCount()):
            self.setVerticalHeaderItem(index, QtGui.QTableWidgetItem(listsVerticalHeaderItem[index]))
        listsVerticalHeaderItem = ['Device 1', 'Device 2', 'Device 3', 'Device 4']
        self.setColumnCount(5)
        listsHorizontalHeaderItem = ['Option 1', 'Option 2']
        self.setColumnCount(len(listsHorizontalHeaderItem))
        for index in range(self.columnCount()):
            self.setHorizontalHeaderItem(index, QtGui.QTableWidgetItem(listsHorizontalHeaderItem[index]))

    def dataChanged (self, topLeftQModelIndex, bottomRightQModelIndex):
        row                  = topLeftQModelIndex.row()
        column               = topLeftQModelIndex.column()
        dataQTableWidgetItem = self.item(row, column)
        print '###### Data Changed  ######'
        print 'row    :', row + 1
        print 'column :', column + 1
        print 'data   :', dataQTableWidgetItem.text()
        self.emit(QtCore.SIGNAL('dataChanged'), row, column, dataQTableWidgetItem)
        QtGui.QTableWidget.dataChanged(self, topLeftQModelIndex, bottomRightQModelIndex)

class QCustomWidget (QtGui.QWidget):
    def __init__(self, parent = None):
        super(QCustomWidget, self).__init__(parent)
        self.myQCustomTableWidget = QCustomTableWidget(self)
        self.myQLabel = QtGui.QLabel('Track edited data', self)
        myQVBoxLayout = QtGui.QVBoxLayout()
        myQVBoxLayout.addWidget(self.myQLabel)
        myQVBoxLayout.addWidget(self.myQCustomTableWidget)
        self.setLayout(myQVBoxLayout)
        self.connect(self.myQCustomTableWidget, QtCore.SIGNAL('dataChanged'), self.setTrackData)

    def setTrackData (self, row, column, dataQTableWidgetItem):
        self.myQLabel.setText('Last updated\nRow : %d, Column : %d, Data : %s' % (row + 1, column + 1, str(dataQTableWidgetItem.text())))

if __name__ == '__main__':
    myQApplication = QtGui.QApplication(sys.argv)
    myQCustomWidget = QCustomWidget()
    myQCustomWidget.show()
    sys.exit(myQApplication.exec_())

---

QAbstractItemView.dataChanged (self, QModelIndex topLeft, QModelIndex BottomRight) 引用:http://pyqt.sourceforge.net/Docs/PyQt4/qabstractitemview.html#dataChanged

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问候，