列表常用信号

.settings/org.eclipse.core.resources.prefs

@@ -31,6 +31,7 @@ encoding//QGraphicsView/WorldMap.py=utf-8
 encoding//QListView/CustomWidgetSortItem.py=utf-8
 encoding//QListView/SortItemByRole.py=utf-8
 encoding//QListWidget/FoldWidget.py=utf-8
+encoding//QListWidget/SignalsExample.py=utf-8
 encoding//QMessageBox/CustomColorIcon.py=utf-8
 encoding//QProgressBar/Lib/WaterRippleProgressBar.py=utf-8
 encoding//QProgressBar/MetroCircleProgress.py=utf-8

QListWidget/README.md

@@ -5,6 +5,7 @@
   - [自定义可拖拽Item](#2自定义可拖拽Item)
   - [腾讯视频热播列表](#3腾讯视频热播列表)
   - [仿折叠控件效果](#4仿折叠控件效果)
+  - [列表常用信号](#5列表常用信号)
 
 ## 1、删除自定义Item
 [运行 DeleteCustomItem.py](DeleteCustomItem.py)
@@ -52,4 +53,11 @@
 3. 绑定按钮的选中状态通过`setHidden`设置Item的隐藏和显示
 4. 自定义控件中尺寸发生变化后需要调用`adjustSize()`来同步
 
-![FoldWidget](ScreenShot/FoldWidget.gif)
+![FoldWidget](ScreenShot/FoldWidget.gif)
+
+## 5、列表常用信号
+[运行 SignalsExample.py](SignalsExample.py)
+
+根据官网文档 https://doc.qt.io/qt-5/qlistwidget.html#signals 中的信号介绍编写
+
+![SignalsExample](ScreenShot/SignalsExample.gif)

QListWidget/SignalsExample.py

@@ -0,0 +1,125 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2019年7月3日
+@author: Irony
+@site: https://pyqt5.com https://github.com/PyQt5
+@email: 892768447@qq.com
+@file: QListWidget.SignalsExample
+@description: 
+"""
+from PyQt5.QtCore import Qt
+from PyQt5.QtGui import QColor
+from PyQt5.QtWidgets import QWidget, QHBoxLayout, QListWidget, QPlainTextEdit,\
+    QListWidgetItem, QAbstractItemView, QListView
+
+
+__Author__ = "Irony"
+__Copyright__ = "Copyright (c) 2019"
+__Version__ = "Version 1.0"
+
+
+def formatColor(text, color):
+    return '<font color={0}>{1}</font>'.format(color.name(), text)
+
+
+class Window(QWidget):
+
+    def __init__(self, *args, **kwargs):
+        super(Window, self).__init__(*args, **kwargs)
+        layout = QHBoxLayout(self)
+
+        self.listWidget = QListWidget(self)
+        self.listWidget.setAlternatingRowColors(True)
+        self.listWidget.setSelectionMode(QAbstractItemView.ExtendedSelection)
+        self.listWidget.setMovement(QListView.Free)
+        self.listWidget.setMouseTracking(True)  # 用于itemEntered信号
+
+        self.resultView = QPlainTextEdit(self)
+        self.resultView.setReadOnly(True)
+
+        layout.addWidget(self.listWidget)
+        layout.addWidget(self.resultView)
+
+        self.initData()
+        self.initSignals()
+
+    def initData(self):
+        # 初始化模拟数据
+        for i in range(100):
+            item = QListWidgetItem('Item {0}'.format(i), self.listWidget)
+            if i % 3 == 0:
+                item.setFlags(item.flags() | Qt.ItemIsEditable)
+
+    def initSignals(self):
+        # 初始化信号
+        self.listWidget.currentItemChanged.connect(self.onCurrentItemChanged)
+        self.listWidget.currentRowChanged.connect(self.onCurrentRowChanged)
+        self.listWidget.currentTextChanged.connect(self.onCurrentTextChanged)
+        self.listWidget.itemActivated.connect(self.onItemActivated)
+        self.listWidget.itemChanged.connect(self.onItemChanged)
+        self.listWidget.itemClicked.connect(self.onItemClicked)
+        self.listWidget.itemDoubleClicked.connect(self.onItemDoubleClicked)
+        self.listWidget.itemEntered.connect(self.onItemEntered)
+        self.listWidget.itemPressed.connect(self.onItemPressed)
+        self.listWidget.itemSelectionChanged.connect(
+            self.onItemSelectionChanged)
+
+    def onCurrentItemChanged(self, current, previous):
+        current = current.text() if current else ''
+        previous = previous.text() if previous else ''
+        self.resultView.appendHtml(
+            '{0}: [{1}] -> [{2}]'.format(
+                formatColor('currentItemChanged', QColor(Qt.red)),
+                current, previous))
+
+    def onCurrentRowChanged(self, currentRow):
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(
+                formatColor('currentRowChanged', QColor(Qt.green)),
+                currentRow))
+
+    def onCurrentTextChanged(self, currentText):
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(
+                formatColor('currentTextChanged', QColor(Qt.yellow)), currentText))
+
+    def onItemActivated(self, item):
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(
+                formatColor('itemActivated', QColor(Qt.blue)), item.text()))
+
+    def onItemChanged(self, item):
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(
+                formatColor('itemChanged', QColor(Qt.cyan)), item.text()))
+
+    def onItemClicked(self, item):
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(formatColor('itemClicked', QColor(Qt.magenta)), item.text()))
+
+    def onItemDoubleClicked(self, item):
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(formatColor('itemDoubleClicked', QColor(Qt.darkGreen)), item.text()))
+
+    def onItemEntered(self, item):
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(formatColor('itemEntered', QColor(Qt.darkCyan)), item.text()))
+
+    def onItemPressed(self, item):
+        print(item)
+        self.resultView.appendHtml(
+            '{0}: {1}'.format(formatColor('itemPressed', QColor(Qt.darkYellow)), item.text()))
+
+    def onItemSelectionChanged(self):
+        self.resultView.appendPlainText('itemSelectionChanged')
+
+
+if __name__ == '__main__':
+    import sys
+    from PyQt5.QtWidgets import QApplication
+    app = QApplication(sys.argv)
+    w = Window()
+    w.show()
+    sys.exit(app.exec_())

README.md

@@ -60,6 +60,7 @@ https://pyqt5.com 社区是专门针对PyQt5学习和提升开设的博客网站
     - [自定义可拖拽Item](QListWidget/DragDrop.py)
     - [腾讯视频热播列表](QListWidget/HotPlaylist.py)
     - [仿折叠控件效果](QListWidget/FoldWidget.py)
+    - [列表常用信号](QListWidget/SignalsExample.py)
     - [在item中添加图标](Test/partner_625781186/13.combo_listwidget)
   - [QTreeWidget](QTreeWidget)
     - [通过json数据生成树形结构](QTreeWidget/ParsingJson.py)