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#40 Js交互

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Irony 2019-04-27 16:47:05 +08:00
parent 072b13727b
commit 4393c43289
7 changed files with 638 additions and 1 deletions
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1
.settings/org.eclipse.core.resources.prefs
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@ -49,6 +49,7 @@ encoding//QTableWidget/TableWidget.py=utf-8
encoding//QThread/moveToThread.py=utf-8
encoding//QTreeWidget/ParsingJson.py=utf-8
encoding//QWebEngineView/GetCookie.py=utf-8
encoding//QWebEngineView/JsSignals.py=utf-8
encoding//QWebView/DreamTree.py=utf-8
encoding//QWebView/GetCookie.py=utf-8
encoding//QWidget/Lib/CustomPaintWidget.py=utf-8

46
QWebEngineView/Data/JsSignals.html Normal file
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<!DOCTYPE html>
<html>
<head>
<title>测试</title>
<script src="qwebchannel.js"></script>
<script>
new QWebChannel(qt.webChannelTransport,
function(channel) {
window.Bridge = channel.objects.Bridge;
// 这里绑定窗口的标题变化信号（这个信号是由QWidget内部的）
Bridge.windowTitleChanged.connect(function(title) {
showLog("标题被修改为：" + title);
});
// 绑定自定义的信号customSignal
Bridge.customSignal.connect(function(text) {
showLog("收到自定义信号内容：" + text);
});
}
);
function showLog(text) {
var ele = document.getElementById("result");
ele.value = ele.value + text + "\n";
}
</script>
</head>
<body>
<h3>1、测试修改窗口属性</h3>
windowTitle 是Qt窗口本身的属性, 当标题被修改后会触发本身的windowTitleChanged信号<br>
<input type="text" id="title" placeholder="请输入标题" />
<p></p>
<button onclick="javascript:Bridge.windowTitle = document.getElementById('title').value;">测试修改标题</button>
<h3>2、调用Python中的方法callFromJs</h3>
callFromJs(str) 函数是由Python代码中定义, 通过@pyqtSlot(str)装饰器暴露出来<br>
<button onclick="javascript:Bridge.callFromJs('test');">Bridge.callFromJs('test')</button>
<h3>3、发送自定义信号</h3>
点击底部的按钮将会发送customSignal信号出来，网页中收到该信号将会在下面日志框输出内容<br>
<p>日志</p>
<textarea id="result" rows="20" cols="100"></textarea>
</body>
</html>

427
QWebEngineView/Data/qwebchannel.js Normal file
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@ -0,0 +1,427 @@
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebChannel module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
"use strict";
var QWebChannelMessageTypes = {
signal: 1,
propertyUpdate: 2,
init: 3,
idle: 4,
debug: 5,
invokeMethod: 6,
connectToSignal: 7,
disconnectFromSignal: 8,
setProperty: 9,
response: 10,
};
var QWebChannel = function(transport, initCallback)
{
if (typeof transport !== "object" || typeof transport.send !== "function") {
console.error("The QWebChannel expects a transport object with a send function and onmessage callback property." +
" Given is: transport: " + typeof(transport) + ", transport.send: " + typeof(transport.send));
return;
}
var channel = this;
this.transport = transport;
this.send = function(data)
{
if (typeof(data) !== "string") {
data = JSON.stringify(data);
}
channel.transport.send(data);
}
this.transport.onmessage = function(message)
{
var data = message.data;
if (typeof data === "string") {
data = JSON.parse(data);
}
switch (data.type) {
case QWebChannelMessageTypes.signal:
channel.handleSignal(data);
break;
case QWebChannelMessageTypes.response:
channel.handleResponse(data);
break;
case QWebChannelMessageTypes.propertyUpdate:
channel.handlePropertyUpdate(data);
break;
default:
console.error("invalid message received:", message.data);
break;
}
}
this.execCallbacks = {};
this.execId = 0;
this.exec = function(data, callback)
{
if (!callback) {
// if no callback is given, send directly
channel.send(data);
return;
}
if (channel.execId === Number.MAX_VALUE) {
// wrap
channel.execId = Number.MIN_VALUE;
}
if (data.hasOwnProperty("id")) {
console.error("Cannot exec message with property id: " + JSON.stringify(data));
return;
}
data.id = channel.execId++;
channel.execCallbacks[data.id] = callback;
channel.send(data);
};
this.objects = {};
this.handleSignal = function(message)
{
var object = channel.objects[message.object];
if (object) {
object.signalEmitted(message.signal, message.args);
} else {
console.warn("Unhandled signal: " + message.object + "::" + message.signal);
}
}
this.handleResponse = function(message)
{
if (!message.hasOwnProperty("id")) {
console.error("Invalid response message received: ", JSON.stringify(message));
return;
}
channel.execCallbacks[message.id](message.data);
delete channel.execCallbacks[message.id];
}
this.handlePropertyUpdate = function(message)
{
for (var i in message.data) {
var data = message.data[i];
var object = channel.objects[data.object];
if (object) {
object.propertyUpdate(data.signals, data.properties);
} else {
console.warn("Unhandled property update: " + data.object + "::" + data.signal);
}
}
channel.exec({type: QWebChannelMessageTypes.idle});
}
this.debug = function(message)
{
channel.send({type: QWebChannelMessageTypes.debug, data: message});
};
channel.exec({type: QWebChannelMessageTypes.init}, function(data) {
for (var objectName in data) {
var object = new QObject(objectName, data[objectName], channel);
}
// now unwrap properties, which might reference other registered objects
for (var objectName in channel.objects) {
channel.objects[objectName].unwrapProperties();
}
if (initCallback) {
initCallback(channel);
}
channel.exec({type: QWebChannelMessageTypes.idle});
});
};
function QObject(name, data, webChannel)
{
this.__id__ = name;
webChannel.objects[name] = this;
// List of callbacks that get invoked upon signal emission
this.__objectSignals__ = {};
// Cache of all properties, updated when a notify signal is emitted
this.__propertyCache__ = {};
var object = this;
// ----------------------------------------------------------------------
this.unwrapQObject = function(response)
{
if (response instanceof Array) {
// support list of objects
var ret = new Array(response.length);
for (var i = 0; i < response.length; ++i) {
ret[i] = object.unwrapQObject(response[i]);
}
return ret;
}
if (!response
|| !response["__QObject*__"]
|| response.id === undefined) {
return response;
}
var objectId = response.id;
if (webChannel.objects[objectId])
return webChannel.objects[objectId];
if (!response.data) {
console.error("Cannot unwrap unknown QObject " + objectId + " without data.");
return;
}
var qObject = new QObject( objectId, response.data, webChannel );
qObject.destroyed.connect(function() {
if (webChannel.objects[objectId] === qObject) {
delete webChannel.objects[objectId];
// reset the now deleted QObject to an empty {} object
// just assigning {} though would not have the desired effect, but the
// below also ensures all external references will see the empty map
// NOTE: this detour is necessary to workaround QTBUG-40021
var propertyNames = [];
for (var propertyName in qObject) {
propertyNames.push(propertyName);
}
for (var idx in propertyNames) {
delete qObject[propertyNames[idx]];
}
}
});
// here we are already initialized, and thus must directly unwrap the properties
qObject.unwrapProperties();
return qObject;
}
this.unwrapProperties = function()
{
for (var propertyIdx in object.__propertyCache__) {
object.__propertyCache__[propertyIdx] = object.unwrapQObject(object.__propertyCache__[propertyIdx]);
}
}
function addSignal(signalData, isPropertyNotifySignal)
{
var signalName = signalData[0];
var signalIndex = signalData[1];
object[signalName] = {
connect: function(callback) {
if (typeof(callback) !== "function") {
console.error("Bad callback given to connect to signal " + signalName);
return;
}
object.__objectSignals__[signalIndex] = object.__objectSignals__[signalIndex] || [];
object.__objectSignals__[signalIndex].push(callback);
if (!isPropertyNotifySignal && signalName !== "destroyed") {
// only required for "pure" signals, handled separately for properties in propertyUpdate
// also note that we always get notified about the destroyed signal
webChannel.exec({
type: QWebChannelMessageTypes.connectToSignal,
object: object.__id__,
signal: signalIndex
});
}
},
disconnect: function(callback) {
if (typeof(callback) !== "function") {
console.error("Bad callback given to disconnect from signal " + signalName);
return;
}
object.__objectSignals__[signalIndex] = object.__objectSignals__[signalIndex] || [];
var idx = object.__objectSignals__[signalIndex].indexOf(callback);
if (idx === -1) {
console.error("Cannot find connection of signal " + signalName + " to " + callback.name);
return;
}
object.__objectSignals__[signalIndex].splice(idx, 1);
if (!isPropertyNotifySignal && object.__objectSignals__[signalIndex].length === 0) {
// only required for "pure" signals, handled separately for properties in propertyUpdate
webChannel.exec({
type: QWebChannelMessageTypes.disconnectFromSignal,
object: object.__id__,
signal: signalIndex
});
}
}
};
}
/**
* Invokes all callbacks for the given signalname. Also works for property notify callbacks.
*/
function invokeSignalCallbacks(signalName, signalArgs)
{
var connections = object.__objectSignals__[signalName];
if (connections) {
connections.forEach(function(callback) {
callback.apply(callback, signalArgs);
});
}
}
this.propertyUpdate = function(signals, propertyMap)
{
// update property cache
for (var propertyIndex in propertyMap) {
var propertyValue = propertyMap[propertyIndex];
object.__propertyCache__[propertyIndex] = propertyValue;
}
for (var signalName in signals) {
// Invoke all callbacks, as signalEmitted() does not. This ensures the
// property cache is updated before the callbacks are invoked.
invokeSignalCallbacks(signalName, signals[signalName]);
}
}
this.signalEmitted = function(signalName, signalArgs)
{
invokeSignalCallbacks(signalName, this.unwrapQObject(signalArgs));
}
function addMethod(methodData)
{
var methodName = methodData[0];
var methodIdx = methodData[1];
object[methodName] = function() {
var args = [];
var callback;
for (var i = 0; i < arguments.length; ++i) {
var argument = arguments[i];
if (typeof argument === "function")
callback = argument;
else if (argument instanceof QObject && webChannel.objects[argument.__id__] !== undefined)
args.push({
"id": argument.__id__
});
else
args.push(argument);
}
webChannel.exec({
"type": QWebChannelMessageTypes.invokeMethod,
"object": object.__id__,
"method": methodIdx,
"args": args
}, function(response) {
if (response !== undefined) {
var result = object.unwrapQObject(response);
if (callback) {
(callback)(result);
}
}
});
};
}
function bindGetterSetter(propertyInfo)
{
var propertyIndex = propertyInfo[0];
var propertyName = propertyInfo[1];
var notifySignalData = propertyInfo[2];
// initialize property cache with current value
// NOTE: if this is an object, it is not directly unwrapped as it might
// reference other QObject that we do not know yet
object.__propertyCache__[propertyIndex] = propertyInfo[3];
if (notifySignalData) {
if (notifySignalData[0] === 1) {
// signal name is optimized away, reconstruct the actual name
notifySignalData[0] = propertyName + "Changed";
}
addSignal(notifySignalData, true);
}
Object.defineProperty(object, propertyName, {
configurable: true,
get: function () {
var propertyValue = object.__propertyCache__[propertyIndex];
if (propertyValue === undefined) {
// This shouldn't happen
console.warn("Undefined value in property cache for property \"" + propertyName + "\" in object " + object.__id__);
}
return propertyValue;
},
set: function(value) {
if (value === undefined) {
console.warn("Property setter for " + propertyName + " called with undefined value!");
return;
}
object.__propertyCache__[propertyIndex] = value;
var valueToSend = value;
if (valueToSend instanceof QObject && webChannel.objects[valueToSend.__id__] !== undefined)
valueToSend = { "id": valueToSend.__id__ };
webChannel.exec({
"type": QWebChannelMessageTypes.setProperty,
"object": object.__id__,
"property": propertyIndex,
"value": valueToSend
});
}
});
}
// ----------------------------------------------------------------------
data.methods.forEach(addMethod);
data.properties.forEach(bindGetterSetter);
data.signals.forEach(function(signal) { addSignal(signal, false); });
for (var name in data.enums) {
object[name] = data.enums[name];
}
}
//required for use with nodejs
if (typeof module === 'object') {
module.exports = {
QWebChannel: QWebChannel
};
}

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QWebEngineView/JsSignals.py Normal file
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@ -0,0 +1,152 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2019年4月27日
@author: Irony
@site: https://pyqt5.com https://github.com/892768447
@email: 892768447@qq.com
@file: QWebEngineView.JsSignals
@description:
"""
import os
from time import time
from PyQt5.QtCore import QUrl, pyqtSlot, pyqtSignal
from PyQt5.QtWebChannel import QWebChannel
from PyQt5.QtWebEngineWidgets import QWebEngineView, QWebEngineSettings
from PyQt5.QtWidgets import QMessageBox, QWidget, QVBoxLayout, QPushButton
__Author__ = 'Irony'
__Copyright__ = 'Copyright (c) 2019'
class WebEngineView(QWebEngineView):
customSignal = pyqtSignal(str)
def __init__(self, *args, **kwargs):
super(WebEngineView, self).__init__(*args, **kwargs)
self.initSettings()
self.channel = QWebChannel(self)
# 把自身对象传递进去
self.channel.registerObject('Bridge', self)
# 设置交互接口
self.page().setWebChannel(self.channel)
# START #####以下代码可能是在5.6 QWebEngineView刚出来时的bug,必须在每次加载页面的时候手动注入
# self.page().loadStarted.connect(self.onLoadStart)
# self._script = open('Data/qwebchannel.js', 'rb').read().decode()
# def onLoadStart(self):
# self.page().runJavaScript(self._script)
# END ###########################
# 注意pyqtSlot用于把该函数暴露给js可以调用
@pyqtSlot(str)
def callFromJs(self, text):
QMessageBox.information(self, "提示", "来自js调用：{}".format(text))
def sendCustomSignal(self):
# 发送自定义信号
self.customSignal.emit('当前时间: ' + str(time()))
@pyqtSlot(str)
@pyqtSlot(QUrl)
def load(self, url):
'''
eg: load("https://pyqt5.com")
:param url: 网址
'''
return super(WebEngineView, self).load(QUrl(url))
def initSettings(self):
'''
eg: 初始化设置
'''
# 获取浏览器默认设置
settings = QWebEngineSettings.globalSettings()
# 设置默认编码utf8
settings.setDefaultTextEncoding("utf-8")
# 自动加载图片,默认开启
# settings.setAttribute(QWebEngineSettings.AutoLoadImages,True)
# 自动加载图标,默认开启
# settings.setAttribute(QWebEngineSettings.AutoLoadIconsForPage,True)
# 开启js,默认开启
# settings.setAttribute(QWebEngineSettings.JavascriptEnabled,True)
# js可以访问剪贴板
settings.setAttribute(
QWebEngineSettings.JavascriptCanAccessClipboard, True)
# js可以打开窗口,默认开启
# settings.setAttribute(QWebEngineSettings.JavascriptCanOpenWindows,True)
# 链接获取焦点时的状态,默认开启
# settings.setAttribute(QWebEngineSettings.LinksIncludedInFocusChain,True)
# 本地储存,默认开启
# settings.setAttribute(QWebEngineSettings.LocalStorageEnabled,True)
# 本地访问远程
settings.setAttribute(
QWebEngineSettings.LocalContentCanAccessRemoteUrls, True)
# 本地加载,默认开启
# settings.setAttribute(QWebEngineSettings.LocalContentCanAccessFileUrls,True)
# 监控负载要求跨站点脚本,默认关闭
# settings.setAttribute(QWebEngineSettings.XSSAuditingEnabled,False)
# 空间导航特性,默认关闭
# settings.setAttribute(QWebEngineSettings.SpatialNavigationEnabled,False)
# 支持平超链接属性,默认关闭
# settings.setAttribute(QWebEngineSettings.HyperlinkAuditingEnabled,False)
# 使用滚动动画,默认关闭
settings.setAttribute(QWebEngineSettings.ScrollAnimatorEnabled, True)
# 支持错误页面,默认启用
# settings.setAttribute(QWebEngineSettings.ErrorPageEnabled, True)
# 支持插件,默认关闭
settings.setAttribute(QWebEngineSettings.PluginsEnabled, True)
# 支持全屏应用程序,默认关闭
settings.setAttribute(
QWebEngineSettings.FullScreenSupportEnabled, True)
# 支持屏幕截屏,默认关闭
settings.setAttribute(QWebEngineSettings.ScreenCaptureEnabled, True)
# 支持html5 WebGl,默认开启
settings.setAttribute(QWebEngineSettings.WebGLEnabled, True)
# 支持2d绘制,默认开启
settings.setAttribute(
QWebEngineSettings.Accelerated2dCanvasEnabled, True)
# 支持图标触摸,默认关闭
settings.setAttribute(QWebEngineSettings.TouchIconsEnabled, True)
class Window(QWidget):
def __init__(self, *args, **kwargs):
super(Window, self).__init__(*args, **kwargs)
layout = QVBoxLayout(self)
self.webview = WebEngineView(self)
layout.addWidget(self.webview)
layout.addWidget(QPushButton(
'发送自定义信号', self, clicked=self.webview.sendCustomSignal))
self.webview.windowTitleChanged.connect(self.setWindowTitle)
self.webview.load(QUrl.fromLocalFile(
os.path.abspath('Data/JsSignals.html')))
if __name__ == "__main__":
from PyQt5.QtWidgets import QApplication
import sys
# 开启F12 控制台功能，需要单独通过浏览器打开这个页面
# 这里可以做个保护, 发布软件,启动时把这个环境变量删掉。防止他人通过环境变量开启
os.environ['QTWEBENGINE_REMOTE_DEBUGGING'] = '9966'
app = QApplication(sys.argv)
w = Window()
w.show()
w.move(100, 100)
# 打开调试页面
dw = QWebEngineView()
dw.setWindowTitle('开发人员工具')
dw.load(QUrl('http://127.0.0.1:9966'))
dw.move(600, 100)
dw.show()
sys.exit(app.exec_())

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QWebEngineView/README.md
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@ -2,6 +2,7 @@
- 目录
- [获取Cookie](#1、获取Cookie)
- [和Js交互操作](#2、和Js交互操作)
## 1、获取Cookie
[运行 GetCookie.py](GetCookie.py)
@ -9,3 +10,12 @@
通过`QWebEngineProfile`中得到的`cookieStore`并绑定它的`cookieAdded`信号来得到Cookie
![GetCookie](ScreenShot/GetCookie.png)
## 2、和Js交互操作
[运行 JsSignals.py](JsSignals.py)
通过`qwebchannel.js`和`QWebChannel.registerObject`进行Python对象和Javascript的交互
具体看代码中的注释
![JsSignals](ScreenShot/JsSignals.gif)

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1
README.md
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@ -114,6 +114,7 @@ https://pyqt5.com 社区是专门针对PyQt5学习和提升开设的博客网站
- [获取Cookie](QWebView/GetCookie.py)
- [QWebEngineView](QWebEngineView)
- [获取Cookie](QWebEngineView/GetCookie.py)
- [和Js交互操作](QWebEngineView/JsSignals.py)
- [浏览器下载文件](Test/partner_625781186/6.QWebEngineView下载文件)
- [打印网页](Test/partner_625781186/17_打印预览qwebengineview)