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Diffstat (limited to 'examples/webenginewidgets/contentmanipulation')
8 files changed, 538 insertions, 0 deletions
diff --git a/examples/webenginewidgets/contentmanipulation/contentmanipulation.pro b/examples/webenginewidgets/contentmanipulation/contentmanipulation.pro new file mode 100644 index 000000000..2ac97d487 --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/contentmanipulation.pro @@ -0,0 +1,10 @@ +QT += webenginewidgets + +HEADERS = mainwindow.h +SOURCES = main.cpp \ + mainwindow.cpp +RESOURCES = jquery.qrc + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/webenginewidgets/contentmanipulation +INSTALLS += target diff --git a/examples/webenginewidgets/contentmanipulation/doc/images/contentmanipulation-example.png b/examples/webenginewidgets/contentmanipulation/doc/images/contentmanipulation-example.png Binary files differnew file mode 100644 index 000000000..717ac9ddc --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/doc/images/contentmanipulation-example.png diff --git a/examples/webenginewidgets/contentmanipulation/doc/src/contentmanipulation.qdoc b/examples/webenginewidgets/contentmanipulation/doc/src/contentmanipulation.qdoc new file mode 100644 index 000000000..676173755 --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/doc/src/contentmanipulation.qdoc @@ -0,0 +1,142 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:FDL$ +** 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 http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Free Documentation License Usage +** Alternatively, this file may be used under the terms of the GNU Free +** Documentation License version 1.3 as published by the Free Software +** Foundation and appearing in the file included in the packaging of +** this file. Please review the following information to ensure +** the GNU Free Documentation License version 1.3 requirements +** will be met: http://www.gnu.org/copyleft/fdl.html. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \example webenginewidgets/contentmanipulation + \title WebEngine Content Manipulation Example + \ingroup webengine-widgetexamples + \brief Demonstrates how to use browse web and manipulate content + + \brief The Content Manipulation example shows how to use JQuery with QtWebEngine to + create a web browser with special effects and content + manipulation. + + \image contentmanipulation-example.png + + The application makes use of QWebEnginePage::evaluateJavaScript to + evaluate the jQuery JavaScript code. A QMainWindow with a QWebEngineView + as central widget builds up the browser itself. + + \include examples-run.qdocinc + + \section1 MainWindow Class Definition + + The \c MainWindow class inherits QMainWindow. It implements a number of + slots to perform actions on both the application and on the web content. + + \snippet webenginewidgets/contentmanipulation/mainwindow.h 1 + + We also declare a QString that contains the jQuery, a QWebView + that displays the web content, and a QLineEdit that acts as the + address bar. + + \section1 MainWindow Class Implementation + + We start by implementing the constructor. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 1 + + The first part of the constructor sets the value of \c progress to + 0. This value will be used later in the code to visualize the + loading of a webpage. + + Next, the jQuery library is loaded using a QFile and reading the file + content. The jQuery library is a JavaScript library that provides different + functions for manipulating HTML. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 2 + + The second part of the constructor creates a QWebView and connects + slots to the views signals. Furthermore, we create a QLineEdit as + the browsers address bar. We then set the horizontal QSizePolicy + to fill the available area in the browser at all times. We add the + QLineEdit to a QToolbar together with a set of navigation actions + from QWebView::pageAction. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 3 + + The third and last part of the constructor implements two QMenus and assigns + a set of actions to them. The last line sets the QWebView as the central + widget in the QMainWindow. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 4 + + When the page is loaded, \c adjustLocation() updates the address + bar; \c adjustLocation() is triggered by the \c loadFinished() + signal in QWebView. In \c changeLocation() we create a QUrl + object, and then use it to load the page into the QWebView. When + the new web page has finished loading, \c adjustLocation() will be + run once more to update the address bar. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 5 + + \c adjustTitle() sets the window title and displays the loading + progress. This slot is triggered by the \c titleChanged() signal + in QWebView. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 6 + + When a web page has loaded, \c finishLoading() is triggered by the + \c loadFinished() signal in QWebView. \c finishLoading() then updates the + progress in the title bar and calls \c evaluateJavaScript() + to evaluate the jQuery library. This evaluates the JavaScript against the + current web page. What that means is that the JavaScript can be viewed as + part of the content loaded into the QWebView, and therefore needs to be + loaded every time a new page is loaded. Once the jQuery library is loaded, + we can start executing the different jQuery functions in the browser. + + The rotateImages() function is then called explicitely to make sure + that the images of the newly loaded page respect the state of the toggle + action. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 7 + + The first jQuery-based function, \c highlightAllLinks(), is designed to + highlight all links in the current webpage. The JavaScript code looks + for web elements named \e {a}, which is the tag for a hyperlink. + For each such element, the background color is set to be yellow by + using CSS. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 8 + + The \c rotateImages() function rotates the images on the current + web page. This JavaScript code relies on CSS transforms and + looks up all \e {img} elements and rotates the images 180 degrees + and then back again. + + \snippet webenginewidgets/contentmanipulation/mainwindow.cpp 9 + + The remaining four methods remove different elements from the current web + page. \c removeGifImages() removes all GIF images on the page by looking up + the \e {src} attribute of all the elements on the web page. Any element with + a \e {gif} file as its source is removed. \c removeInlineFrames() removes all + \e {iframe} or inline elements. \c removeObjectElements() removes all + \e {object} elements, and \c removeEmbeddedElements() removes any elements + such as plugins embedded on the page using the \e {embed} tag. + +*/ + diff --git a/examples/webenginewidgets/contentmanipulation/jquery.min.js b/examples/webenginewidgets/contentmanipulation/jquery.min.js new file mode 100644 index 000000000..b1ae21d8b --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/jquery.min.js @@ -0,0 +1,19 @@ +/* + * jQuery JavaScript Library v1.3.2 + * http://jquery.com/ + * + * Copyright (c) 2009 John Resig + * Dual licensed under the MIT and GPL licenses. + * http://docs.jquery.com/License + * + * Date: 2009-02-19 17:34:21 -0500 (Thu, 19 Feb 2009) + * Revision: 6246 + */ +(function(){var l=this,g,y=l.jQuery,p=l.$,o=l.jQuery=l.$=function(E,F){return new o.fn.init(E,F)},D=/^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,f=/^.[^:#\[\.,]*$/;o.fn=o.prototype={init:function(E,H){E=E||document;if(E.nodeType){this[0]=E;this.length=1;this.context=E;return this}if(typeof E==="string"){var G=D.exec(E);if(G&&(G[1]||!H)){if(G[1]){E=o.clean([G[1]],H)}else{var I=document.getElementById(G[3]);if(I&&I.id!=G[3]){return o().find(E)}var F=o(I||[]);F.context=document;F.selector=E;return F}}else{return o(H).find(E)}}else{if(o.isFunction(E)){return o(document).ready(E)}}if(E.selector&&E.context){this.selector=E.selector;this.context=E.context}return this.setArray(o.isArray(E)?E:o.makeArray(E))},selector:"",jquery:"1.3.2",size:function(){return this.length},get:function(E){return E===g?Array.prototype.slice.call(this):this[E]},pushStack:function(F,H,E){var G=o(F);G.prevObject=this;G.context=this.context;if(H==="find"){G.selector=this.selector+(this.selector?" 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\ No newline at end of file diff --git a/examples/webenginewidgets/contentmanipulation/jquery.qrc b/examples/webenginewidgets/contentmanipulation/jquery.qrc new file mode 100644 index 000000000..1022d682f --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/jquery.qrc @@ -0,0 +1,5 @@ +<RCC> + <qresource prefix="/" > + <file>jquery.min.js</file> + </qresource> +</RCC> diff --git a/examples/webenginewidgets/contentmanipulation/main.cpp b/examples/webenginewidgets/contentmanipulation/main.cpp new file mode 100644 index 000000000..a21d881f4 --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/main.cpp @@ -0,0 +1,57 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtWidgets> +#include "mainwindow.h" +#include <qtwebenginewidgetsglobal.h> + +int main(int argc, char * argv[]) +{ + QApplication app(argc, argv); + + QUrl url; + if (argc > 1) + url = QUrl::fromUserInput(argv[1]); + else + url = QUrl("http://www.google.com/ncr"); + MainWindow *browser = new MainWindow(url); + browser->show(); + return app.exec(); +} diff --git a/examples/webenginewidgets/contentmanipulation/mainwindow.cpp b/examples/webenginewidgets/contentmanipulation/mainwindow.cpp new file mode 100644 index 000000000..3dca497a3 --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/mainwindow.cpp @@ -0,0 +1,225 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtWidgets> +#include <QtWebEngineWidgets> +#include "mainwindow.h" + +template<typename Arg, typename R, typename C> +struct InvokeWrapper { + R *receiver; + void (C::*memberFun)(Arg); + void operator()(Arg result) { + (receiver->*memberFun)(result); + } +}; + +template<typename Arg, typename R, typename C> +InvokeWrapper<Arg, R, C> invoke(R *receiver, void (C::*memberFun)(Arg)) +{ + InvokeWrapper<Arg, R, C> wrapper = {receiver, memberFun}; + return wrapper; +} + +//! [1] + +MainWindow::MainWindow(const QUrl& url) +{ + progress = 0; + + QFile file; + file.setFileName(":/jquery.min.js"); + file.open(QIODevice::ReadOnly); + jQuery = file.readAll(); + jQuery.append("\nvar qt = { 'jQuery': jQuery.noConflict(true) };"); + file.close(); +//! [1] + +//! [2] + view = new QWebEngineView(this); + view->load(url); + connect(view, SIGNAL(loadFinished(bool)), SLOT(adjustLocation())); + connect(view, SIGNAL(titleChanged(QString)), SLOT(adjustTitle())); + connect(view, SIGNAL(loadProgress(int)), SLOT(setProgress(int))); + connect(view, SIGNAL(loadFinished(bool)), SLOT(finishLoading(bool))); + + locationEdit = new QLineEdit(this); + locationEdit->setSizePolicy(QSizePolicy::Expanding, locationEdit->sizePolicy().verticalPolicy()); + connect(locationEdit, SIGNAL(returnPressed()), SLOT(changeLocation())); + + QToolBar *toolBar = addToolBar(tr("Navigation")); + toolBar->addAction(view->pageAction(QWebEnginePage::Back)); + toolBar->addAction(view->pageAction(QWebEnginePage::Forward)); + toolBar->addAction(view->pageAction(QWebEnginePage::Reload)); + toolBar->addAction(view->pageAction(QWebEnginePage::Stop)); + toolBar->addWidget(locationEdit); +//! [2] + + QMenu *viewMenu = menuBar()->addMenu(tr("&View")); + QAction* viewSourceAction = new QAction("Page Source", this); + connect(viewSourceAction, SIGNAL(triggered()), SLOT(viewSource())); + viewMenu->addAction(viewSourceAction); + +//! [3] + QMenu *effectMenu = menuBar()->addMenu(tr("&Effect")); + effectMenu->addAction("Highlight all links", this, SLOT(highlightAllLinks())); + + rotateAction = new QAction(this); + rotateAction->setIcon(style()->standardIcon(QStyle::SP_FileDialogDetailedView)); + rotateAction->setCheckable(true); + rotateAction->setText(tr("Turn images upside down")); + connect(rotateAction, SIGNAL(toggled(bool)), this, SLOT(rotateImages(bool))); + effectMenu->addAction(rotateAction); + + QMenu *toolsMenu = menuBar()->addMenu(tr("&Tools")); + toolsMenu->addAction(tr("Remove GIF images"), this, SLOT(removeGifImages())); + toolsMenu->addAction(tr("Remove all inline frames"), this, SLOT(removeInlineFrames())); + toolsMenu->addAction(tr("Remove all object elements"), this, SLOT(removeObjectElements())); + toolsMenu->addAction(tr("Remove all embedded elements"), this, SLOT(removeEmbeddedElements())); + + setCentralWidget(view); +} +//! [3] + +void MainWindow::viewSource() +{ + QTextEdit* textEdit = new QTextEdit(NULL); + textEdit->setAttribute(Qt::WA_DeleteOnClose); + textEdit->adjustSize(); + textEdit->move(this->geometry().center() - textEdit->rect().center()); + textEdit->show(); + + view->page()->toHtml(invoke(textEdit, &QTextEdit::setPlainText)); +} + +//! [4] +void MainWindow::adjustLocation() +{ + locationEdit->setText(view->url().toString()); +} + +void MainWindow::changeLocation() +{ + QUrl url = QUrl::fromUserInput(locationEdit->text()); + view->load(url); + view->setFocus(); +} +//! [4] + +//! [5] +void MainWindow::adjustTitle() +{ + if (progress <= 0 || progress >= 100) + setWindowTitle(view->title()); + else + setWindowTitle(QString("%1 (%2%)").arg(view->title()).arg(progress)); +} + +void MainWindow::setProgress(int p) +{ + progress = p; + adjustTitle(); +} +//! [5] + +//! [6] +void MainWindow::finishLoading(bool) +{ + progress = 100; + adjustTitle(); + view->page()->runJavaScript(jQuery); + + rotateImages(rotateAction->isChecked()); +} +//! [6] + +//! [7] +void MainWindow::highlightAllLinks() +{ + // We append '; undefined' after the jQuery call here to prevent a possible recursion loop and crash caused by + // the way the elements returned by the each iterator elements reference each other, which causes problems upon + // converting them to QVariants. + QString code = "qt.jQuery('a').each( function () { qt.jQuery(this).css('background-color', 'yellow') } ); undefined"; + view->page()->runJavaScript(code); +} +//! [7] + +//! [8] +void MainWindow::rotateImages(bool invert) +{ + QString code; + + // We append '; undefined' after each of the jQuery calls here to prevent a possible recursion loop and crash caused by + // the way the elements returned by the each iterator elements reference each other, which causes problems upon + // converting them to QVariants. + if (invert) + code = "qt.jQuery('img').each( function () { qt.jQuery(this).css('-webkit-transition', '-webkit-transform 2s'); qt.jQuery(this).css('-webkit-transform', 'rotate(180deg)') } ); undefined"; + else + code = "qt.jQuery('img').each( function () { qt.jQuery(this).css('-webkit-transition', '-webkit-transform 2s'); qt.jQuery(this).css('-webkit-transform', 'rotate(0deg)') } ); undefined"; + view->page()->runJavaScript(code); +} +//! [8] + +//! [9] +void MainWindow::removeGifImages() +{ + QString code = "qt.jQuery('[src*=gif]').remove()"; + view->page()->runJavaScript(code); +} + +void MainWindow::removeInlineFrames() +{ + QString code = "qt.jQuery('iframe').remove()"; + view->page()->runJavaScript(code); +} + +void MainWindow::removeObjectElements() +{ + QString code = "qt.jQuery('object').remove()"; + view->page()->runJavaScript(code); +} + +void MainWindow::removeEmbeddedElements() +{ + QString code = "qt.jQuery('embed').remove()"; + view->page()->runJavaScript(code); +} +//! [9] + diff --git a/examples/webenginewidgets/contentmanipulation/mainwindow.h b/examples/webenginewidgets/contentmanipulation/mainwindow.h new file mode 100644 index 000000000..8e9b12538 --- /dev/null +++ b/examples/webenginewidgets/contentmanipulation/mainwindow.h @@ -0,0 +1,80 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtWidgets> + +QT_BEGIN_NAMESPACE +class QWebEngineView; +class QLineEdit; +QT_END_NAMESPACE + +//! [1] +class MainWindow : public QMainWindow +{ + Q_OBJECT + +public: + MainWindow(const QUrl& url); + +protected slots: + + void adjustLocation(); + void changeLocation(); + void adjustTitle(); + void setProgress(int p); + void finishLoading(bool); + + void viewSource(); + + void highlightAllLinks(); + void rotateImages(bool invert); + void removeGifImages(); + void removeInlineFrames(); + void removeObjectElements(); + void removeEmbeddedElements(); + +private: + QString jQuery; + QWebEngineView *view; + QLineEdit *locationEdit; + QAction *rotateAction; + int progress; +//! [1] +}; |
