禁止父节点

QTreeWidget/ParentNodeForbid.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2019年11月8日
+@author: Irony
+@site: https://pyqt5.com https://github.com/892768447
+@email: 892768447@qq.com
+@file: QTreeWidget.ParentNodeForbid
+@description: 父节点不可选中
+"""
+from PyQt5.QtCore import Qt
+from PyQt5.QtWidgets import QTreeWidget, QTreeWidgetItem
+
+
+__Author__ = 'Irony'
+__Copyright__ = 'Copyright (c) 2019'
+__Version__ = 1.0
+
+
+class Window(QTreeWidget):
+
+    def __init__(self, *args, **kwargs):
+        super(Window, self).__init__(*args, **kwargs)
+
+        # 父节点（不可选中）
+        pitem1 = QTreeWidgetItem(self, ['parent item 1'])
+        # 设置不可选中
+        pitem1.setFlags(pitem1.flags() & ~Qt.ItemIsSelectable)
+        # 设置一个标识用于屏蔽鼠标事件
+        pitem1.setData(0, Qt.UserRole + 1, True)
+
+        pitem2 = QTreeWidgetItem(self, ['parent item 2'])
+        pitem2.setFlags(pitem2.flags() & ~Qt.ItemIsSelectable)
+        pitem2.setData(0, Qt.UserRole + 1, True)
+
+        # 子节点（可选）
+        citem1 = QTreeWidgetItem(pitem1, ['child item 1'])
+        citem2 = QTreeWidgetItem(pitem2, ['child item 2'])
+
+        self.expandAll()
+
+        # 信号槽
+        self.itemActivated.connect(self.onItemActivated)
+        self.itemClicked.connect(self.onItemClicked)
+        self.itemDoubleClicked.connect(self.onItemDoubleClicked)
+        self.itemPressed.connect(self.onItemPressed)
+
+    def mousePressEvent(self, event):
+        # 鼠标点击事件,判断当前点击位置是否有item且满足标志则拦截鼠标事件
+        item = self.itemAt(event.pos())
+        if item and item.data(0, Qt.UserRole + 1):
+            event.accept()
+            return
+        super(Window, self).mousePressEvent(event)
+
+    def onItemActivated(self, item, column):
+        print('Activated', item.text(0), item, column)
+
+    def onItemClicked(self, item, column):
+        print('Clicked', item.text(0), item, column)
+
+    def onItemDoubleClicked(self, item, column):
+        print('DoubleClicked', item.text(0), item, column)
+
+    def onItemPressed(self, item, column):
+        print('Pressed', item.text(0), item, column)
+
+
+if __name__ == '__main__':
+    import sys
+    import cgitb
+    cgitb.enable(1, None, 5, '')
+    from PyQt5.QtWidgets import QApplication
+    app = QApplication(sys.argv)
+    w = Window()
+    w.show()
+    sys.exit(app.exec_())

QTreeWidget/README.md

@@ -3,6 +3,7 @@
 - 目录
   - [通过json数据生成树形结构](#1通过json数据生成树形结构)
   - [点击父节点全选/取消全选子节点](#2点击父节点全选取消全选子节点)
+  - [禁止父节点/禁止父节点](#3禁止父节点)
 
 ## 1、通过json数据生成树形结构
 [运行 ParsingJson.py](ParsingJson.py)
@@ -17,4 +18,12 @@
 
 点击父节点全选/取消全选子节点
 
-![testTreeWidget](ScreenShot/allSelectNode.png)
+![testTreeWidget](ScreenShot/allSelectNode.png)
+
+## 3、禁止父节点
+[运行 ParentNodeForbid.py](ParentNodeForbid.py)
+
+ 1. 父节点通过设置`pitem1.setFlags(pitem1.flags() & ~Qt.ItemIsSelectable)`为不可选
+ 2. 完全禁用点击等需要重写`mousePressEvent`事件并结合item的标志来判断
+
+![ParentNodeForbid](ScreenShot/ParentNodeForbid.gif)

README.md

@@ -67,6 +67,7 @@ https://pyqt.site 论坛是专门针对PyQt5学习和提升开设的网站，分
     - [通过json数据生成树形结构](QTreeWidget/ParsingJson.py)
     - [拖拽显示为图片](Test/partner_625781186/12.1拖拽显示为图片)
     - [点击父节点全选/取消全选子节点](QTreeWidget/testTreeWidget.py)
+    - [禁止父节点](QTreeWidget/ParentNodeForbid.py)
   - [QTableWidget](QTableWidget)
     - [Sqlalchemy动态拼接字段查询显示表格](QTableWidget/SqlQuery.py)
     - [TableWidget嵌入部件](QTableWidget/TableWidget.py)