PyQt5 QTreeView樹圖

QTreeWidget

QTreeWidget 是繼承了QTreeView

常用方法：

 樹形結構是通過QTreeWidget和 QTreeWidgetItem類實作的：

代碼：

# -*- coding: utf-8 -*-

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *


class TreeWidgetDemo(QMainWindow):
    def __init__(self,parent = None):
        super(TreeWidgetDemo,self).__init__(parent)
        self.setWindowTitle('TreeWidget 例子')
        self.tree = QTreeWidget()
        #設定列數
        self.tree.setColumnCount(2)
        # 設定頭的标題
        self.tree.setHeaderLabels(['Key','Value'])
        root = QTreeWidgetItem(self.tree)
        root.setText(0,'root')
        root.setIcon(0, QIcon("./images/root.png"))
        # 設定列寬
        self.tree.setColumnWidth(0,160)

        ### 設定節點的背景顔色
        # brush_red = QBrush(Qt.red)
        # root.setBackground(0, brush_red)
        # brush_green = QBrush(Qt.green)
        # root.setBackground(1, brush_green)
        # 設定子節點1
        child1 = QTreeWidgetItem(root)
        child1.setText(0,'child1')
        child1.setText(1,'ios')
        child1.setIcon(0,QIcon("./images/IOS.png"))
        child1.setCheckState(0,Qt.Checked)

        # 設定子節點2
        child2 = QTreeWidgetItem(root)
        child2.setText(0, 'child2')
        child2.setText(1, '')
        child2.setIcon(0, QIcon("./images/android.png"))

        # 設定子節點3
        child3 = QTreeWidgetItem(child2)
        child3.setText(0, 'child3')
        child3.setText(1, 'android')
        child3.setIcon(0, QIcon("./images/music.png"))

        self.tree.addTopLevelItem(root)
        # 結點全部展開
        self.tree.expandAll()

        self.setCentralWidget(self.tree)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    example = TreeWidgetDemo()
    example.show()
    sys.exit(app.exec_())

           

添加響應事件：

#!/usr/bin/env python3



from PyQt5.QtWidgets import *
import sys

class TreeWidgetDemo(QMainWindow):   
	def __init__(self,parent=None):
		super(TreeWidgetDemo,self).__init__(parent)
		self.setWindowTitle('TreeWidget 例子')
		self.tree = QTreeWidget()
		# 設定列數
		self.tree.setColumnCount(2)
		# 設定頭的标題
		self.tree.setHeaderLabels(['Key','Value'])
		root= QTreeWidgetItem(self.tree)
		root.setText(0,'root')
		root.setText(1,'0')
		
		child1 = QTreeWidgetItem(root)
		child1.setText(0,'child1')
		child1.setText(1,'1')
		
		child2 = QTreeWidgetItem(root)
		child2.setText(0,'child2')
		child2.setText(1,'2')
		
		child3 = QTreeWidgetItem(root)
		child3.setText(0,'child3')
		child3.setText(1,'3')		
		
		child4 = QTreeWidgetItem(child3)
		child4.setText(0,'child4')
		child4.setText(1,'4')

		child5 = QTreeWidgetItem(child3)
		child5.setText(0,'child5')
		child5.setText(1,'5')
        
		self.tree.addTopLevelItem(root)
		self.tree.clicked.connect( self.onTreeClicked )
        		
		self.setCentralWidget(self.tree)  

	def onTreeClicked(self, qmodelindex):
		item = self.tree.currentItem()
		print("key=%s ,value=%s" % (item.text(0), item.text(1)))
        
if __name__ == '__main__':
	app = QApplication(sys.argv)
	tree = TreeWidgetDemo()
	tree.show()
	sys.exit(app.exec_())
           

增加與删除： 

#!/usr/bin/env python3



import sys
from PyQt5.QtWidgets import *
#from PyQt5.QtGui import QIcon ,  QBrush , QColor
#from PyQt5.QtCore import Qt 

class TreeWidgetDemo(QWidget):   
	def __init__(self,parent=None):
		super(TreeWidgetDemo,self).__init__(parent)
		self.setWindowTitle('TreeWidget 例子')
        
		operatorLayout = QHBoxLayout()
		addBtn = QPushButton("添加節點")
		updateBtn =  QPushButton("修改節點")
		delBtn = QPushButton("删除節點")		
		operatorLayout.addWidget(addBtn)
		operatorLayout.addWidget(updateBtn)
		operatorLayout.addWidget(delBtn)
		# 按鈕的信号槽連接配接
		addBtn.clicked.connect(self.addTreeNodeBtn )
		updateBtn.clicked.connect(self.updateTreeNodeBtn )
		delBtn.clicked.connect(self.delTreeNodeBtn )		
		
		self.tree = QTreeWidget(self)
        # 設定列數
		self.tree.setColumnCount(2)
        # 設定頭的标題
		self.tree.setHeaderLabels(['Key','Value'])
		root= QTreeWidgetItem(self.tree)
		root.setText(0,'root')
		root.setText(1,'0')
		
		child1 = QTreeWidgetItem(root)
		child1.setText(0,'child1')
		child1.setText(1,'1')
		
		child2 = QTreeWidgetItem(root)
		child2.setText(0,'child2')
		child2.setText(1,'2')
		
		child3 = QTreeWidgetItem(root)
		child3.setText(0,'child3')
		child3.setText(1,'3')		
		
		child4 = QTreeWidgetItem(child3)
		child4.setText(0,'child4')
		child4.setText(1,'4')

		child5 = QTreeWidgetItem(child3)
		child5.setText(0,'child5')
		child5.setText(1,'5')
        
		self.tree.addTopLevelItem(root)
		self.tree.clicked.connect( self.onTreeClicked )
        		
		mainLayout = QVBoxLayout(self);
		mainLayout.addLayout(operatorLayout);
		mainLayout.addWidget(self.tree);		
		self.setLayout(mainLayout)		

	def onTreeClicked(self, qmodelindex):
		item = self.tree.currentItem()
		print("key=%s ,value=%s" % (item.text(0), item.text(1)))
		
	def addTreeNodeBtn(self):
		print('--- addTreeNodeBtn ---')
		item = self.tree.currentItem()
		node = QTreeWidgetItem(item)
		node.setText(0,'newNode')
		node.setText(1,'10')	


	def updateTreeNodeBtn(self):
		print('--- updateTreeNodeBtn ---')
		item = self.tree.currentItem()
		item.setText(0,'updateNode')
		item.setText(1,'20')		


	def delTreeNodeBtn(self):
		print('--- delTreeNodeBtn ---')
		item = self.tree.currentItem()
		root = self.tree.invisibleRootItem()
		for item in self.tree.selectedItems():
			(item.parent() or root).removeChild(item)
        		
if __name__ == '__main__':
	app = QApplication(sys.argv)
	tree = TreeWidgetDemo()
	tree.show()
	sys.exit(app.exec_())
           

使用QTreeView 讀取系統:

 代碼：

#!/usr/bin/env python3

'''
    【簡介】
	PyQT5中 QTreeView 例子
   
  
'''

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
        
if __name__ == '__main__':
	app =  QApplication(sys.argv)  	 
	#Window系統提供的模式  
	model = QDirModel()  
	#建立一個QtreeView部件  
	tree = QTreeView()  
	#為部件添加模式  
	tree.setModel(model)  
	tree.setWindowTitle( "QTreeView 例子" )  
	tree.resize(640, 480)  
	tree.show()  
	sys.exit(app.exec_())  
           

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