qml交互

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

@@ -70,6 +70,7 @@ encoding//QWidget/Lib/CustomPaintWidget.py=utf-8
 encoding//QWidget/Lib/CustomWidget.py=utf-8
 encoding//QWidget/WidgetStyle.py=utf-8
 encoding//QtQuick/FlatStyle.py=utf-8
+encoding//QtQuick/Signals.py=utf-8
 encoding//QtRemoteObjects/SyncUi/WindowMaster.py=utf-8
 encoding//QtRemoteObjects/SyncUi/WindowSlave.py=utf-8
 encoding//Test/\u5168\u5C40\u70ED\u952E/HotKey.py=utf-8

QtQuick/Signals.py

@@ -0,0 +1,131 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Created on 2019年9月18日
+@author: Irony
+@site: https://pyqt5.com https://github.com/892768447
+@email: 892768447@qq.com
+@file: QtQuick.Signals
+@description: 信号槽
+"""
+
+import sys
+
+from PyQt5.QtCore import QCoreApplication, Qt, pyqtSlot
+from PyQt5.QtQml import QQmlApplicationEngine
+from PyQt5.QtWidgets import QApplication, QMessageBox, QWidget, QVBoxLayout,\
+    QPushButton, QTextBrowser
+
+
+__Author__ = 'Irony'
+__Copyright__ = 'Copyright (c) 2019'
+
+QML = """import QtQuick 2.0
+import QtQuick.Controls 1.6
+import QtQuick.Layouts 1.3
+
+ApplicationWindow {
+    visible: true
+    width: 400
+    height: 400
+    id: root
+    title: "editor"
+
+    // 定义信号槽
+    signal valueChanged(int value)
+    
+    Component.onCompleted: {
+        // 绑定信号槽到python中的函数
+        valueChanged.connect(_Window.onValueChanged);
+    }
+    
+    function appendText(text) {
+        // 定义添加文字函数
+        textArea.append(text)
+    }
+
+    ColumnLayout {
+        id: columnLayout
+        anchors.fill: parent
+
+        Button {
+            id: button
+            text: qsTr("Button")
+            Layout.fillWidth: true
+            onClicked: {
+                // 点击按钮调用python中的函数并得到返回值
+                var ret = _Window.testSlot("Button")
+                textArea.append("我调用了testSlot函数得到返回值: " + ret)
+            }
+        }
+
+        Slider {
+            id: sliderHorizontal
+            Layout.fillWidth: true
+            stepSize: 1
+            minimumValue: 0
+            maximumValue: 100
+            // 拉动条值改变时发送信号
+            onValueChanged: root.valueChanged(value)
+        }
+
+        TextArea {
+            id: textArea
+            Layout.fillWidth: true
+        }
+    }
+
+}
+"""
+
+
+class Window(QWidget):
+
+    def __init__(self, *args, **kwargs):
+        super(Window, self).__init__(*args, **kwargs)
+        layout = QVBoxLayout(self)
+        layout.addWidget(QPushButton('Python调用qml中的函数',
+                                     self, clicked=self.callQmlFunc))
+        self.resultView = QTextBrowser(self)
+        layout.addWidget(self.resultView)
+
+    def callQmlFunc(self):
+        # 主动调用qml中的appendText函数
+        engine.rootObjects()[0].appendText('我是被Python调用了')
+
+    @pyqtSlot(int)
+    def onValueChanged(self, value):
+        # qml中的自定义信号valueChanged所绑定的槽函数
+        self.resultView.append('拉动条值: %s' % value)
+
+    @pyqtSlot(str, result=str)  # 可以获取返回值
+    def testSlot(self, name):
+        # 被qml调用的函数
+        self.resultView.append('我被主动调用: %s' % name)
+        return str(len(name))
+
+
+if __name__ == '__main__':
+    try:
+        QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
+    except:
+        pass
+
+    app = QApplication(sys.argv)
+
+    # 测试界面
+    w = Window()
+    w.resize(400, 400)
+    w.show()
+    w.move(400, 400)
+
+    engine = QQmlApplicationEngine()
+    # 提供一个沟通的对象_Window，必须是要继承QObject的类
+    engine.rootContext().setContextProperty('_Window', w)
+
+    engine.objectCreated.connect(
+        lambda obj, _: QMessageBox.critical(None, '错误', '运行失败，请检查') if not obj else 0)
+    engine.loadData(QML.encode())
+
+    sys.exit(app.exec_())