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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2018年12月27日
@author: Irony
@site: https://pyqt.site , https://github.com/PyQt5
@email: 892768447@qq.com
@file: QListView.SortItemByRole
@description:
"""
from random import choice
try:
from PyQt5.QtCore import QSortFilterProxyModel, Qt
from PyQt5.QtGui import QStandardItem, QStandardItemModel
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QListView, QPushButton
except ImportError:
from PySide2.QtCore import QSortFilterProxyModel, Qt
from PySide2.QtGui import QStandardItem, QStandardItemModel
from PySide2.QtWidgets import QApplication, QWidget, QVBoxLayout, QListView, QPushButton
class SortFilterProxyModel(QSortFilterProxyModel):
def __init__(self, *args, **kwargs):
super(SortFilterProxyModel, self).__init__(*args, **kwargs)
self._topIndex = 0
def setSortIndex(self, index):
self._topIndex = index
print('在最前面的序号为:', index)
def lessThan(self, source_left, source_right):
if not source_left.isValid() or not source_right.isValid():
return False
if self.sortRole() == ClassifyRole and \
source_left.column() == self.sortColumn() and \
source_right.column() == self.sortColumn():
# 获取左右两个的分类
leftIndex = source_left.data(ClassifyRole)
rightIndex = source_right.data(ClassifyRole)
# 升序
if self.sortOrder() == Qt.AscendingOrder:
# 保持在最前面
if leftIndex == self._topIndex:
leftIndex = -1
if rightIndex == self._topIndex:
rightIndex = -1
return leftIndex < rightIndex
return super(SortFilterProxyModel, self).lessThan(source_left, source_right)
NameDict = {
'唐': ['Tang', 0],
'宋': ['Song', 1],
'元': ['Yuan', 2],
'明': ['Ming', 3],
'清': ['Qing', 4],
}
IndexDict = {
0: '唐',
1: '宋',
2: '元',
3: '明',
4: '清',
}
IdRole = Qt.UserRole + 1 # 用于恢复排序
ClassifyRole = Qt.UserRole + 2 # 用于按照分类序号排序
class Window(QWidget):
def __init__(self, *args, **kwargs):
super(Window, self).__init__(*args, **kwargs)
self.resize(600, 400)
layout = QVBoxLayout(self)
self.listView = QListView(self)
self.listView.setEditTriggers(QListView.NoEditTriggers)
layout.addWidget(self.listView)
layout.addWidget(QPushButton('恢复默认顺序', self, clicked=self.restoreSort))
layout.addWidget(QPushButton('唐', self, clicked=self.sortByClassify))
layout.addWidget(QPushButton('宋', self, clicked=self.sortByClassify))
layout.addWidget(QPushButton('元', self, clicked=self.sortByClassify))
layout.addWidget(QPushButton('明', self, clicked=self.sortByClassify))
layout.addWidget(QPushButton('清', self, clicked=self.sortByClassify))
self._initItems()
def restoreSort(self):
# 恢复默认排序
self.fmodel.setSortRole(IdRole) # 必须设置排序角色为ID
self.fmodel.sort(0) # 排序第一列按照ID升序
def sortByClassify(self):
self.fmodel.setSortIndex(NameDict.get(
self.sender().text(), ['', 100])[1])
# self.restoreSort()
self.fmodel.setSortRole(IdRole)
# 按照给定的分类排序(这里注意还要按照把给定分类的放在最前面)
self.fmodel.setSortRole(ClassifyRole)
self.fmodel.sort(0)
def _initItems(self):
# 初始化Items
self.dmodel = QStandardItemModel(self.listView)
self.fmodel = SortFilterProxyModel(self.listView)
self.fmodel.setSourceModel(self.dmodel)
self.listView.setModel(self.fmodel)
keys = list(NameDict.keys())
print(keys) # ['清', '元', '唐', '明', '宋']
classifies = [v[1] for v in NameDict.values()]
for i in range(5):
# 添加5个100, 用于模拟没有分类, 排序的时候就显示在最后面
classifies.append(100)
print(classifies) # [4, 2, 0, 3, 1, 100, 100, 100, 100, 100]
# 生成50个Item
for i in range(50):
# name = keys[i % 4] # 随机取一个朝代
item = QStandardItem()
# 设置ID角色
item.setData(i, IdRole)
# 设置分类角色
c = choice(classifies)
item.setData(c, ClassifyRole)
# 设置显示内容
item.setText('Name: {}\t\tId: {}\t\tClassify: {}'.format(
IndexDict.get(c, '其它'), i, c))
self.dmodel.appendRow(item)
if __name__ == '__main__':
import sys
import cgitb
cgitb.enable(format='text')
app = QApplication(sys.argv)
w = Window()
w.show()
sys.exit(app.exec_())
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