python - 在 PyQT4 中上下移动行

Question

考虑一个 QTableWidget 和两个按钮“向上移动”和“向下移动”。单击上移，当前行应向上移动一行，类似于“下移”。

实现相应的上移和下移功能最简单的方法是什么？

Answer 1

我设法只使用 QTableWidget 做到了，这里是一个完整的例子:

import sys
from PyQt4 import QtCore
from PyQt4 import QtGui

class mtable(QtGui.QMainWindow):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)


        self.move_up = QtGui.QAction("Move_Up", self)
        self.connect(self.move_up, QtCore.SIGNAL('triggered()'), self.moveUp)

        self.move_down = QtGui.QAction("Move_Down",self)
        self.connect(self.move_down, QtCore.SIGNAL('triggered()'), self.moveDown)

        self.toolbar = self.addToolBar('Toolbar')
        self.toolbar.addAction(self.move_up)
        self.toolbar.addAction(self.move_down)


        ##Init Table
        self.table = QtGui.QTableWidget(4,3)
        for i in range(0,4):
            for j in range(0,4):
                self.table.setItem(i,j,QtGui.QTableWidgetItem("a_"+str(i)+str(j)))

        self.setCentralWidget(self.table)

    def moveDown(self):
        row = self.table.currentRow()
        column = self.table.currentColumn();
        if row < self.table.rowCount()-1:
            self.table.insertRow(row+2)
            for i in range(self.table.columnCount()):
               self.table.setItem(row+2,i,self.table.takeItem(row,i))
               self.table.setCurrentCell(row+2,column)
            self.table.removeRow(row)        


    def moveUp(self):    
        row = self.table.currentRow()
        column = self.table.currentColumn();
        if row > 0:
            self.table.insertRow(row-1)
            for i in range(self.table.columnCount()):
               self.table.setItem(row-1,i,self.table.takeItem(row+1,i))
               self.table.setCurrentCell(row-1,column)
            self.table.removeRow(row+1)        


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    tb = mtable()
    tb.show()
    sys.exit(app.exec_())