按字母數字列對PySide.QtGui.QTreeWidget進行排序

Question

我想按alpha_numeric列對QTreeWidget進行排序。

更新：

繼ekhumoro's example，我重新實現的QTreeWidgetItem__lt__方法使用desired natural sorting。

相關代碼：

class TreeWidgetItem(QtGui.QTreeWidgetItem): 
    def __lt__(self, other): 
     column = self.treeWidget().sortColumn() 
     key1 = self.text(column) 
     key2 = other.text(column) 
     return self.natural_sort_key(key1) < self.natural_sort_key(key2) 

    @staticmethod 
    def natural_sort_key(key): 
     regex = '(\d*\.\d+|\d+)' 
     parts = re.split(regex, key) 
     return tuple((e if i % 2 == 0 else float(e)) for i, e in enumerate(parts)) 

更新全工作示例：

import sys 
import re 
from PySide import QtGui, QtCore 

data = [ 
    {"name": "Apple", "alpha_numeric": "11"}, 
    {"name": "Apple", "alpha_numeric": "125b"}, 
    {"name": "Apple", "alpha_numeric": "125a"}, 
    {"name": "Apple", "alpha_numeric": "3"}, 
    {"name": "Orange", "alpha_numeric": "11"}, 
    {"name": "Orange", "alpha_numeric": "125b"}, 
    {"name": "Orange", "alpha_numeric": "125a"}, 
    {"name": "Orange", "alpha_numeric": "3"}, 
] 

# re-implement the QTreeWidgetItem 
class TreeWidgetItem(QtGui.QTreeWidgetItem): 
    def __lt__(self, other): 
     column = self.treeWidget().sortColumn() 
     key1 = self.text(column) 
     key2 = other.text(column) 
     return self.natural_sort_key(key1) < self.natural_sort_key(key2) 

    @staticmethod 
    def natural_sort_key(key): 
     regex = '(\d*\.\d+|\d+)' 
     parts = re.split(regex, key) 
     return tuple((e if i % 2 == 0 else float(e)) for i, e in enumerate(parts)) 


class MainWindow(QtGui.QMainWindow): 
    def __init__(self): 
     super(MainWindow, self).__init__() 
     self.resize(300, 300) 
     self.table = None 
     self.ui() 

    def ui(self): 
     # setup the table 
     self.table = QtGui.QTreeWidget() 
     self.table.setRootIsDecorated(False) 
     self.table.setAlternatingRowColors(True) 
     self.table.setSortingEnabled(True) 

     # columns and widths 
     column_names = ['Name', 'Alpha Numeric'] 
     self.table.setColumnCount(2) 
     self.table.setColumnWidth(0, 150) 
     self.table.setColumnWidth(1, 150) 
     self.table.setHeaderLabels(column_names) 

     # row data 
     for row in data: 
      column = TreeWidgetItem(self.table) 
      column.setSizeHint(0, QtCore.QSize(30, 30)) 
      column.setText(0, row['name']) 
      column.setText(1, row['alpha_numeric']) 

     # sort 
     self.table.sortByColumn(1, QtCore.Qt.AscendingOrder) 
     self.table.sortByColumn(0, QtCore.Qt.AscendingOrder) 

     # setup the layout 
     self.setCentralWidget(self.table) 


if __name__ == '__main__': 
    app = QtGui.QApplication(sys.argv) 
    window = MainWindow() 
    window.show() 
    sys.exit(app.exec_()) 

Answer 1

您可以重新實現任何算法你喜歡控制排序的表控件項目和使用的less-than operator ：

class TableWidgetItem(QtGui.QTableWidgetItem): 
    def __lt__(self, other): 
     return funky_sort_key(self.text(), other.text()) 

使用這種方法，你甚至不需要按文本排序 - 你也可以按項目的數據（或其他）進行排序。