#!/usr/bin/env python
# -*- coding: utf-8 -*-
from random import choice, randint
import string
from time import time

from PyQt5.QtCore import QSortFilterProxyModel, Qt, QSize
from PyQt5.QtGui import QStandardItem, QStandardItemModel
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QPushButton, QListView,\
    QHBoxLayout, QLineEdit


# Created on 2018年8月4日
# author: Irony
# site: https://pyqt5.com , https://github.com/892768447
# email: 892768447@qq.com
# file: QListView.显示自定义Widget并排序
# description:
__Author__ = """By: Irony
QQ: 892768447
Email: 892768447@qq.com"""
__Copyright__ = 'Copyright (c) 2018 Irony'
__Version__ = 1.0


def randomChar(y):
    # 返回随机字符串
    return ''.join(choice(string.ascii_letters) for _ in range(y))


class CustomWidget(QWidget):

    def __init__(self, text, *args, **kwargs):
        super(CustomWidget, self).__init__(*args, **kwargs)
        layout = QHBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.addWidget(QLineEdit(text, self))
        layout.addWidget(QPushButton('x', self))

    def sizeHint(self):
        # 决定item的高度
        return QSize(200, 40)


class SortFilterProxyModel(QSortFilterProxyModel):

    def lessThan(self, source_left, source_right):
        if not source_left.isValid() or not source_right.isValid():
            return False
        # 获取数据
        leftData = self.sourceModel().data(source_left)
        rightData = self.sourceModel().data(source_right)
        if self.sortOrder() == Qt.DescendingOrder:
            # 按照时间倒序排序
            leftData = leftData.split('-')[-1]
            rightData = rightData.split('-')[-1]
            return leftData < rightData
#         elif self.sortOrder() == Qt.AscendingOrder:
#             #按照名字升序排序
#             leftData = leftData.split('-')[0]
#             rightData = rightData.split('-')[0]
#             return leftData < rightData
        return super(SortFilterProxyModel, self).lessThan(source_left, source_right)


class Window(QWidget):

    def __init__(self, *args, **kwargs):
        super(Window, self).__init__(*args, **kwargs)
        self.resize(800, 600)
        layout = QVBoxLayout(self)
        # 名字排序
        layout.addWidget(QPushButton('以名字升序', self, clicked=self.sortByName))
        # 时间倒序
        layout.addWidget(QPushButton('以时间倒序', self, clicked=self.sortByTime))
        # listview
        self.listView = QListView(self)
        layout.addWidget(self.listView)
        # 数据模型
        self.dmodel = QStandardItemModel(self.listView)
        # 排序代理模型
        self.fmodel = SortFilterProxyModel(self.listView)
        self.fmodel.setSourceModel(self.dmodel)
        self.listView.setModel(self.fmodel)

        # 模拟生成50条数据
        for _ in range(50):
            name = randomChar(5)
            times = time() + randint(0, 30)  # 当前时间随机+
            value = '{}-{}'.format(name, times)  # 内容用-分开
            item = QStandardItem(value)
#             item.setData(value, Qt.UserRole + 2)
            self.dmodel.appendRow(item)
            # 索引
            index = self.fmodel.mapFromSource(item.index())
            # 自定义的widget
            widget = CustomWidget(value, self)
            item.setSizeHint(widget.sizeHint())
            self.listView.setIndexWidget(index, widget)

    def sortByTime(self):
        # 按照时间倒序排序
        self.fmodel.sort(0, Qt.DescendingOrder)

    def sortByName(self):
        # 按照名字升序排序
        self.fmodel.sort(0, Qt.AscendingOrder)


if __name__ == '__main__':
    import sys
    from PyQt5.QtWidgets import QApplication
    app = QApplication(sys.argv)
    w = Window()
    w.show()
    sys.exit(app.exec_())