如何缩小qt的其他原因

我用的是定制的 QTableWidget 包含 QPlainTextEdit s表示可编辑字段。我必须通过tab和箭头键切换单元格的代码现在与启用鼠标跟踪发生冲突。

按照我的习惯 Qplaintextedit公司 ,我有 focusInEvent 要处理当您点击tab键、shift+tab键、箭头键等时发生的情况,如果它是其中之一,它将忽略该事件,因此 qtablewidget程序 可以应付。

在 qtablewidget程序 ,按下其中一个键后,它将使用 self.selectCell(desiredRow, desiredColumn) 选择所需的单元格(在该函数使用 selectionModel 执行选择)。这触发了 OtherFocusReason 事件原因 Qplaintextedit公司

在 qtablewidget程序 ,我刚用过 self.setMouseTracking(True) 试图跟踪光标悬停在哪个单元格上。不幸的是,这也引发了 其他原因 当鼠标通过它时,导致相同的代码运行,就像我通过键盘切换焦点一样。

有没有办法让我知道 其他原因 是由什么引起的?

下面是一些与键和焦点控件相关的选定位:

class QMultilineTableWidget(QtWidgets.QTableWidget):
    def __init__(self, x=1, y=1, parent=None, *args, **kwargs):
        super(QMultilineTableWidget, self).__init__(*args, **kwargs)
        self.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
        self.setFocusPolicy(QtCore.Qt.NoFocus)
        self.setMouseTracking(True)

    def selectCell(self, row, column, multi=False):
        """Select an individual cell."""
        index = self.model().index(row, column)
        if multi:
            selectionType = QtCore.QItemSelectionModel.Select
        else:
            selectionType = QtCore.QItemSelectionModel.SelectCurrent
        self.selectionModel().setCurrentIndex(index, selectionType)

    def keyPressEvent(self, event):
        """Custom key press events for navigating the table."""
        currentRow = self.currentRow()
        currentColumn = self.currentColumn()
        totalRows = self.rowCount()
        totalColumns = self.columnCount()

        key = event.key()
        desiredRow = currentRow
        desiredColumn = currentColumn

        #Navigate with keys
        if key == QtCore.Qt.Key_Up:
            desiredRow = max(currentRow-1, 0)
        if key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter, QtCore.Qt.Key_Down):
            desiredRow = min(currentRow+1, totalRows-1)
        if key == QtCore.Qt.Key_Left:
            desiredRow, desiredColumn = self._getNextEditableCell(currentRow, currentColumn, reverse=True, allowNewRows=False)[1:]
        if key == QtCore.Qt.Key_Right:
            desiredRow, desiredColumn = self._getNextEditableCell(currentRow, currentColumn, allowNewRows=False)[1:]

        #Move back or forwards with tab
        #TODO: move to next editable text
        if key == QtCore.Qt.Key_Tab:
            desiredRow, desiredColumn = self._getNextEditableCell(currentRow, currentColumn)[1:]
        if key == QtCore.Qt.Key_Backtab:
            desiredRow, desiredColumn = self._getNextEditableCell(currentRow, currentColumn, reverse=True)[1:]

        self.selectCell(desiredRow, desiredColumn)

class _QMultilineTableTextEdit(QtWidgets.QPlainTextEdit):
    mouseClickEnter = QtCore.Signal(QtWidgets.QTextEdit)

    def __init__(self, text='', parent=None, *args, **kwargs):
        super(_QMultilineTableTextEdit, self).__init__(text, parent=None, *args, **kwargs)
        self.setParent(parent)
        self.setFrameStyle(QtWidgets.QFrame.NoFrame)
        self.setFocusPolicy(QtCore.Qt.StrongFocus)

    def focusInEvent(self, event):
        """Handle what happens when the widget is selected."""
        #Send signal to update table position
        #We check TabFocusReason anyway, but the custom tab actually causes OtherFuocusReason
        if event.reason() in (QtCore.Qt.TabFocusReason, QtCore.Qt.BacktabFocusReason, QtCore.Qt.OtherFocusReason):
            self.selectAll()

        #Set cursor to end of text
        elif event.reason() != QtCore.Qt.MouseFocusReason:
            cursor = self.textCursor()
            cursor.movePosition(QtGui.QTextCursor.End)
            self.setTextCursor(cursor)

        self.setEdited(False)
        return super(_QMultilineTableTextEdit, self).focusInEvent(event)

    def keyPressEvent(self, event):
        """Override key presses to see what should be sent to the parent widget instead."""
        key = event.key()
        modifiers = QtWidgets.QApplication.keyboardModifiers()
        ctrlModifier = modifiers & QtCore.Qt.ControlModifier
        shiftModifier = modifiers & QtCore.Qt.ShiftModifier
        altModifier = modifiers & QtCore.Qt.AltModifier
        if key in (QtCore.Qt.Key_Control, QtCore.Qt.Key_Shift, QtCore.Qt.Key_Alt):
            return

        #Only allow enter if it's shift+enter, otherwise send to parent widget
        if key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter) and not shiftModifier:
            return event.ignore()

        #Always send tab to the parent widget
        if key in (QtCore.Qt.Key_Tab, QtCore.Qt.Key_Backtab):
            return event.ignore()

        if key in (QtCore.Qt.Key_Up, QtCore.Qt.Key_Down, QtCore.Qt.Key_Left, QtCore.Qt.Key_Right):
            return event.ignore()

        return super(_QMultilineTableTextEdit, self).keyPressEvent(event)

我想另一种看待这一点的方法是,如何在选择期间发出特定的焦点原因?