4

如何通过双击在 qtablewidget 中编辑水平标题的标签？到目前为止我有什么但不起作用。因此，当有人双击顶部标题时，会弹出一个 linedit 允许输入文本，然后重置标签。

import sys
from PyQt4 import QtGui,QtCore
import generate_file


class WebGetMain(QtGui.QMainWindow,generate_file):
    def __init__(self,parent=None):
        super(WebGetMain,self).__init__(parent)
        self.setupUi(self)
        #set these values customizable before user populates the table
        self.row_count = 20
        self.col_count = 20
        #setup actual cols,rows
        self.web_get_table.setRowCount(self.row_count)
        self.web_get_table.setColumnCount(self.col_count)
        #allow horizontal header to be altered
        #create and initialize linedit
        self.linedit = QtGui.QLineEdit(parent=self.web_get_table.viewport())
        self.linedit.setAlignment(QtCore.Qt.AlignTop)
        self.linedit.setHidden(True)
        self.linedit.editingFinished.connect(self.doneEditing)
        #connect double click action on header
        self.web_get_table.connect(self.web_get_table.horizontalHeader(),QtCore.SIGNAL('sectionDoubleClicked(int)'),self.on_header_doubleClicked)
        #setup vertical scrollbars for adding rows
        self.vBar = self.web_get_table.verticalScrollBar()
        self._vBar_lastVal = self.vBar.value()

        #initialize cols,rows
        for column in range(0, 2):
            for row in range(0, 3):
                print row, column
                item = QtGui.QTableWidgetItem()
                self.web_get_table.setItem(row, column, item)
        #scrollbar value signal to detect for scrolling
        self.vBar.valueChanged.connect(self.scrollbarChanged)

    def scrollbarChanged(self, val):
        #initialize scrollbar
        bar = self.vBar
        minVal, maxVal = bar.minimum(), bar.maximum()
        avg = (minVal+maxVal)/2
        rowCount = self.web_get_table.rowCount()

        # scrolling down
        if val > self._vBar_lastVal and val >= avg:
            self.web_get_table.insertRow(rowCount)

        # scrolling up
        elif val < self._vBar_lastVal:
            lastRow = rowCount-20
            empty = True
            for col in xrange(self.web_get_table.columnCount()):
                item = self.web_get_table.item(lastRow, col)
                if item and item.text():
                    empty=False
                    break
            if empty:
                #remove rows when scrolling up
                self.web_get_table.removeRow(lastRow)
        self._vBar_lastVal = val

    def doneEditing(self):
        self.linedit.blockSignals(True)
        self.linedit.setHidden(True)
        oldname = self.web_get_table.model().dataset.field(self.sectionedit)
        newname = str(self.linedit.text())
        self.web_get_table.model().dataset.changeFieldName(oldname,newname)
        self.linedit.setText('')
        self.web_get_table.setCurrentIndex(QtCore.QModelIndex())        

    def on_header_doubleClicked(self,item):
        self.linedit.setText(self.web_get_table.model().field(item).name)
        self.linedit.setHidden(False)
        self.linedit.blockSignals(False)
        self.linedit.setFocus()
        self.linedit.selectAll()
        self.sectionedit = item

def main():
    app = QtGui.QApplication(sys.argv)
    app.setStyle(QtGui.QStyleFactory.create("Plastique"))
    main_window = WebGetMain()
    main_window.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()
4

2 回答 2

9

老实说，我无法弄清楚你想用它做什么QLineEdit。但据我所知，你已经成功了一半。使用sectionDoubleClicked信号horizontalHeader()是一个好的开始。但剩下的对我来说是一个很大的问号。

您需要做的就是：获取标题项horizontalHeaderItem(index)并使用text来获取值或setText设置新值。

您可能会考虑QInputDialog.getText从用户那里获取新值。

这是一个显示这一点的最小示例：

import sys
from PyQt4 import QtGui

class MyWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(MyWindow, self).__init__(parent)

        self.table = QtGui.QTableWidget(5,5)
        self.table.setHorizontalHeaderLabels(['1', '2', '3', '4', '5'])
        self.table.setVerticalHeaderLabels(['1', '2', '3', '4', '5'])
        self.table.horizontalHeader().sectionDoubleClicked.connect(self.changeHorizontalHeader)

        layout = QtGui.QHBoxLayout()
        layout.addWidget(self.table)
        self.setLayout(layout)

    def changeHorizontalHeader(self, index):
        oldHeader = self.table.horizontalHeaderItem(index).text()
        newHeader, ok = QtGui.QInputDialog.getText(self,
                                                      'Change header label for column %d' % index,
                                                      'Header:',
                                                       QtGui.QLineEdit.Normal,
                                                       oldHeader)
        if ok:
            self.table.horizontalHeaderItem(index).setText(newHeader)


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

    main = MyWindow()
    main.show()

    sys.exit(app.exec_())
于 2012-09-07T04:12:40.203 回答
1

我从 QtCentre 上的 mechsin 找到了这个答案，它对我有用：

http://www.qtcentre.org/threads/12835-How-to-edit-Horizo​​ntal-Header-Item-in-QTableWidget

请参阅线程中的最后一条评论。总之，它在表头的视口中创建了一个 QLineEdit。用于双击标题的插槽会在适当的位置和宽度显示行编辑以覆盖标题部分。用于完成行编辑的槽隐藏行编辑并为标题项捕获其文本值。

于 2013-03-05T18:44:11.707 回答