Question

我是PyQt的新手，我在PyQt4和Python 2.7中制作了一个GUI（其中包括）控制少数微控制器的设置。为了方便地填充和显示设置列表，以及它们来自哪个控制器，我将它放入QTableWidget中，其中列是控制器，行是设置（所有控制器只是彼此重复，但并非所有设置都是从控制器到控制器的值相同。

我遇到的问题是，当用户编辑单元格时，我尝试使用

获取新值

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

但是它只检索在填充期间放置在单元格中的值，而不是刚刚通过键盘输入的值。我已经阅读了一个方法currentText()但是根据我的理解，这需要每个单元格都是它自己的小部件，我不确定是怎么做的。

整个代码非常庞大，我觉得没有必要完整地发布它，但如果需要更多的代码，我会乐意提供。感谢您的帮助，希望将来。

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

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

上次更新8/19/2014 0:29

我不太关心这个事件，因为我要循环整个表格，我确实需要通过键盘改变数据＆＃39; QtGui.QTableWidgetItem.setText＆＃39;所以是的

好的，可能只创建事件然后键盘，但您必须实施QtGui.QTableWidget.focusInEvent(self, eventQFocusEvent)和QtGui.QTableWidget.focusOutEvent(self, eventQFocusEvent)。所以，请看ny示例代码，希望是帮助;

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：它有1个编码有BUG：如果你的设置是由QtGui.QTableWidgetItem.setText＆＃39;通过键盘激活编辑。但是，如果你严格的话，我建议创建你自己的小部件并设置你自己的委托。（但是，非常铁杆......）

我不知道你的手机中的数据是什么。（它是另一个自定义QWidget或它只是普通数据QTableWidgetItem）

无论如何，当用户编辑单元格时，您尝试使用此方法获取该新值QAbstractItemView.dataChanged (self, QModelIndex topLeft, QModelIndex bottomRight)。此方法返回的数据位置已经过编辑，您可以使用QTableWidgetItem QTableWidget.item (self, int row, int column)从索引获取数据。（这就是你说的问题）但是这项工作只有编辑已关闭（不在编辑期间）。

实施例

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)参考：http://pyqt.sourceforge.net/Docs/PyQt4/qabstractitemview.html#dataChanged

此致

PyQt QTableWidget检索已编辑的字段

1 个答案: