设置 pyqt qtablewidget 水平标题标签可编辑 [英] Set pyqt qtablewidget horizontal header lable editable

问题描述

如何通过双击来编辑 qtablewidget 中水平标题的标签?到目前为止我所拥有的但不起作用.因此，当有人双击顶部标题时，会弹出一个 linedit 允许文本，然后重置标签.

How can I edit the label of a horizontal header in a qtablewidget by double clicking on it? What I have so far but does not work. So when someone doubleclicks the top header, a linedit pops up allows for text and then resets the label.

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()

推荐答案

老实说，我不明白你想用那个 QLineEdit 做什么.但据我所知，你已经成功了一半.使用 horizo​​ntalHeader() 的 sectionDoubleClicked 信号是一个好的开始.但其余的对我来说是一个很大的问号.

To be honest, I couldn't figure out what you're trying to do with that QLineEdit. But as far as I can see, you are halfway there. Using sectionDoubleClicked signal of the horizontalHeader() is a good start. But the rest is a big question mark for me.

您需要做的就是:使用 horizo​​ntalHeaderItem(index) 获取标题项并使用 text 获取值或 setText设置新值.

All you need to do is this: Get the header item with horizontalHeaderItem(index) and use text to get the value or setText to set the new value.

你可能会考虑 QInputDialog.getText 从用户那里获取新值.

And you might consider QInputDialog.getText to obtain the new value from the user.

这是一个显示这一点的最小示例:

Here is a minimal example that shows this:

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_())

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