sort
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Irony
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4 changed files with 162 additions and 10 deletions
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## 1. Custom Widget Item
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[Run CustomWidgetItem.py](CustomWidgetItem.py)
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use `setIndexWidget(QModelIndex, QWidget)` to set custom `QWidget`
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## 2. Custom Widget Sort Item
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[Run CustomWidgetSortItem.py](CustomWidgetSortItem.py)
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1. set QListView proxy model, use `QSortFilterProxyModel`
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2. rewrite `lessThan` method to sort
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## 3, Custom Role And Sort
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[Run SortItemByRole.py](SortItemByRole.py)
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Demand:
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1. 5 categories(Tang, Song, Yuan, Ming, Qing) and Unclassified
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2. selected Tang, the result is Tang, Song, Yuan, Ming, Qing, Unclassified
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3. selected Song, the result is Song, Tang, Yuan, Ming, Qing, Unclassified
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4. selected Yuan, the result is Yuan, Tang, Song, Ming, Qing, Unclassified
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5. Cancel sorting then Restore, like: Unclassified, Tang, Tang, Ming, Qing, Unclassified, Song, Yuan, Unclassified
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Method:
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1. define `IdRole = Qt.UserRole + 1` Used to restore default sort
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2. define `ClassifyRole = Qt.UserRole + 2` Used for sorting by sorting number
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3. define 5 classify id
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```python
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NameDict = {
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'Tang': ['Tang', 0],
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'Song': ['Song', 1],
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'Yuan': ['Yuan', 2],
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'Ming': ['Ming', 3],
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'Qing': ['Qing', 4],
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}
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IndexDict = {
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0: 'Tang',
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1: 'Song',
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2: 'Yuan',
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3: 'Ming',
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4: 'Qing',
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}
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```
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4. item `setData(id, IdRole)` Used to restore default sort
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5. item `setData(cid, ClassifyRole)` Used to record classification
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6. inherit `QSortFilterProxyModel` and add `setSortIndex(self, index)` mthod, The purpose is to keep some classify always top
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```python
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def setSortIndex(self, index):
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self._topIndex = index
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```
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7. inherit `QSortFilterProxyModel` and rewrite `lessThan` mthod, if classify id is equal to top id, then modify it -1
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```python
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if self.sortRole() == ClassifyRole and \
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source_left.column() == self.sortColumn() and \
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source_right.column() == self.sortColumn():
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# get classify id
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leftIndex = source_left.data(ClassifyRole)
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rightIndex = source_right.data(ClassifyRole)
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# AscendingOrder
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if self.sortOrder() == Qt.AscendingOrder:
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# keep always top
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if leftIndex == self._topIndex:
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leftIndex = -1
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if rightIndex == self._topIndex:
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rightIndex = -1
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return leftIndex < rightIndex
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```
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8. restore default sort
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```python
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self.fmodel.setSortRole(IdRole)
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self.fmodel.sort(0)
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```
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9. sort by classify id, must reset `setSortRole` to other
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```python
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self.fmodel.setSortIndex(1)
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self.fmodel.setSortRole(IdRole)
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self.fmodel.setSortRole(ClassifyRole)
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self.fmodel.sort(0)
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```
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@ -3,9 +3,85 @@
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## 1、显示自定义Widget
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[运行 CustomWidgetItem.py](CustomWidgetItem.py)
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通过设置 `setIndexWidget(QModelIndex, QWidget)` 可以设置自定义 `QWidget`
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## 2、显示自定义Widget并排序
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[运行 CustomWidgetSortItem.py](CustomWidgetSortItem.py)
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1. 对QListView设置代理 `QSortFilterProxyModel`
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2. 重写model的 `lessThan` 方法进行排序
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## 3、自定义角色排序
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[运行 SortItemByRole.py](SortItemByRole.py)
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需求：
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1. 5种分类（唐、宋、元、明、清） 和 未分类
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2. 选中唐则按照 唐、宋、元、明、清、未分类排序
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3. 选中宋则按照 宋、唐、元、明、清、未分类排序
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4. 选中元则按照 元、唐、宋、明、清、未分类排序
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5. 取消排序则恢复到加载时候顺序，如：未分类、唐、唐、明、清、未分类、宋、元、未分类
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思路：
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1. 定义`IdRole = Qt.UserRole + 1` 用于恢复默认排序
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2. 定义`ClassifyRole = Qt.UserRole + 2` 用于按照分类序号排序
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3. 定义5种分类的id
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```python
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NameDict = {
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'唐': ['Tang', 0],
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'宋': ['Song', 1],
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'元': ['Yuan', 2],
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'明': ['Ming', 3],
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'清': ['Qing', 4],
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}
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IndexDict = {
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0: '唐',
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1: '宋',
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2: '元',
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3: '明',
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4: '清',
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}
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```
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4. item设置 `setData(id, IdRole)` 用于恢复默认排序
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5. item设置 `setData(cid, ClassifyRole)` 用于标识该item的分类
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6. 继承 `QSortFilterProxyModel` 增加 `setSortIndex(self, index)` 方法, 目的在于记录要置顶（不参与排序）的分类ID
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```python
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def setSortIndex(self, index):
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self._topIndex = index
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```
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7. 继承 `QSortFilterProxyModel` 重写 `lessThan` 方法, 判断分类ID是否等于要置顶的ID, 如果是则修改为-1, 这样就永远在最前面
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```python
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if self.sortRole() == ClassifyRole and \
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source_left.column() == self.sortColumn() and \
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source_right.column() == self.sortColumn():
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# 获取左右两个的分类
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leftIndex = source_left.data(ClassifyRole)
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rightIndex = source_right.data(ClassifyRole)
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# 升序
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if self.sortOrder() == Qt.AscendingOrder:
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# 保持在最前面
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if leftIndex == self._topIndex:
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leftIndex = -1
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if rightIndex == self._topIndex:
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rightIndex = -1
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return leftIndex < rightIndex
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```
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8. 恢复默认排序
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```python
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self.fmodel.setSortRole(IdRole) # 必须设置排序角色为ID
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self.fmodel.sort(0) # 排序第一列按照ID升序
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```
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9. 根据分类排序, 这里要注意要先通过 `setSortRole` 设置其它角色再设置目标角色
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```python
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self.fmodel.setSortIndex(1)
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self.fmodel.setSortRole(IdRole)
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self.fmodel.setSortRole(ClassifyRole)
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self.fmodel.sort(0)
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```
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@ -11,7 +11,7 @@ Created on 2018年12月27日
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"""
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from random import choice
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from PyQt5.QtCore import QSortFilterProxyModel, Qt, QTimer
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from PyQt5.QtCore import QSortFilterProxyModel, Qt
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from PyQt5.QtGui import QStandardItem, QStandardItemModel
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from PyQt5.QtWidgets import QWidget, QVBoxLayout, QListView, QPushButton
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@ -49,7 +49,7 @@ class SortFilterProxyModel(QSortFilterProxyModel):
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# 保持在最前面
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if leftIndex == self._topIndex:
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leftIndex = -1
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elif rightIndex == self._topIndex:
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if rightIndex == self._topIndex:
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rightIndex = -1
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return leftIndex < rightIndex
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@ -71,7 +71,6 @@ IndexDict = {
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3: '明',
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4: '清',
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}
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BigIndex = 100
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IdRole = Qt.UserRole + 1 # 用于恢复排序
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ClassifyRole = Qt.UserRole + 2 # 用于按照分类序号排序
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@ -102,11 +101,12 @@ class Window(QWidget):
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def sortByClassify(self):
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self.fmodel.setSortIndex(NameDict.get(
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self.sender().text(), ['', BigIndex])[1])
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self.restoreSort()
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self.sender().text(), ['', 100])[1])
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# self.restoreSort()
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self.fmodel.setSortRole(IdRole)
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# 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）
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self.fmodel.setSortRole(ClassifyRole)
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QTimer.singleShot(100, lambda: self.fmodel.sort(0))
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self.fmodel.sort(0)
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def _initItems(self):
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# 初始化Items
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@ -120,7 +120,7 @@ class Window(QWidget):
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classifies = [v[1] for v in NameDict.values()]
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for i in range(5):
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# 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
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classifies.append(BigIndex)
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classifies.append(100)
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print(classifies) # [4, 2, 0, 3, 1, 100, 100, 100, 100, 100]
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# 生成50个Item
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@ -6,7 +6,7 @@ https://pyqt5.com 社区是专门针对PyQt5学习和提升开设的博客网站
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## 目录
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| 分类 | 控件名 |
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| 分类 | 控件 |
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|:-------|:-------|
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| ActiveX | [QAxWidget](QAxWidget)
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| 日历 | [QCalendarWidget](QCalendarWidget)
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