We have tried a bunch more ideas and none seem to work. We have tried the
following:
m_WebView->page()->triggerAction(QWebEnginePage::Back);
m_WebView->page()->history()->goToItem(
m_WebView->page()->history()->itemAt(1));
m_WebView->page()->triggerAction(QWebEnginePage::Back);
None of these work. The documentation for QWebEngineView _says_ it should work.
Does anyone have any ideas?
Thanks
Mike Jackson
> On Dec 16, 2015, at 3:13 PM, Mike Jackson <imikejack...@gmail.com> wrote:
>
> I have an small app that uses QWebEngineView to display web pages. We have
> tried hooking up a pair of QPushButtons to invoke the forward and back in the
> QWebEngineHistory but neither seem to work. The QActions are getting
> triggered and our code is correctly calling them but the QWebEngineView does
> not actually load the previous page from its history. We have printed out the
> history each time the button is clicked and the history is correctly
> navigated. I am sure we have missed something simple that needs to be
> performed. Maybe some sort of setup of the QWebEngineView or something? I am
> pasting in our simple application hoping that someone can spot the error.
> Thanks
> Mike Jackson
>
> ———main.cpp—————
> #include <QApplication>
> #include "WebTest_UI.h"
> int main(int argc, char* argv[])
> {
>
> QApplication app(argc, argv);
>
> QCoreApplication::setOrganizationDomain("Foo");
> QCoreApplication::setOrganizationName("Bar");
> QCoreApplication::setApplicationName("WebTest_UI");
>
> #if defined (Q_OS_MAC)
> app.setQuitOnLastWindowClosed( true );
> #endif
>
> QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
>
> WebTest_UI* helper = WebTest_UI::Instance();
> helper->show();
>
> return app.exec();
> }
>
> ——WebTest_UI.h—————
> #ifndef _WebTest_UI_H_
> #define _WebTest_UI_H_
> #include <QtWidgets/QWidget>
> #include <QtWidgets/QPushButton>
> #include <QtWebEngineWidgets/QWebEngineView>
> class WebTest_UI : public QWidget
> {
> Q_OBJECT
> public:
> virtual ~WebTest_UI();
> static WebTest_UI* Instance();
> protected:
> WebTest_UI();
> protected slots:
> void goBack(bool b);
> private:
> static WebTest_UI* self;
> QWebEngineView* m_WebView;
> QPushButton* forwardBtn;
> QPushButton* backBtn;
> WebTest_UI(const WebTest_UI&); // Copy Constructor Not Implemented
> void operator=(const WebTest_UI&); // Operator '=' Not Implemented
> };
> #endif /* _WebTest_UI_H */
>
> ——WebTest_UI.cpp—————
> #include "WebTest_UI.h"
> #include <QtCore/QFileInfo>
> #include <QtCore/QDir>
> #include <QtWidgets/QGridLayout>
> #include <QtWidgets/QMessageBox>
> #include <QtWidgets/QAction>
> #include <QtWebEngineWidgets/QWebEngineHistory>
> // Include the MOC generated CPP file which has all the QMetaObject
> methods/data
> #include "moc_WebTest_UI.cpp"
>
> WebTest_UI* WebTest_UI::self = NULL;
> //
> -----------------------------------------------------------------------------
> WebTest_UI::WebTest_UI()
> {
> Q_ASSERT_X(!self, "WebTest_UI", "There should be only one WebTest_UI
> object");
>
> WebTest_UI::self = this;
>
> // Create the web view
> m_WebView = new QWebEngineView(NULL);
> m_WebView->setObjectName(QStringLiteral("m_WebView"));
> QSizePolicy sizePolicy1(QSizePolicy::Expanding, QSizePolicy::Expanding);
> sizePolicy1.setHorizontalStretch(0);
> sizePolicy1.setVerticalStretch(0);
> sizePolicy1.setHeightForWidth(m_WebView->sizePolicy().hasHeightForWidth());
> m_WebView->setSizePolicy(sizePolicy1);
> m_WebView->setUrl(QUrl(QStringLiteral("about:blank")));
> QGridLayout* gridLayout = new QGridLayout(this);
> gridLayout->addWidget(m_WebView, 2, 0, 1, 2);
> m_WebView->load(QUrl("http://download.qt.io";));
> m_WebView->show();
>
> backBtn = new QPushButton("Back");
> gridLayout->addWidget(backBtn, 1, 0, 1, 1);
> connect(backBtn, SIGNAL(clicked(bool)),
> this, SLOT(goBack(bool)));
>
> forwardBtn = new QPushButton("Forward");
> gridLayout->addWidget(forwardBtn, 1,1,1,1);
>
> self->setWindowFlags(this->windowFlags() & ~Qt::WindowContextHelpButtonHint);
>
> #if defined (Q_OS_MAC)
> QAction* closeAction = new QAction(this);
> closeAction->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_W));
> connect(closeAction, SIGNAL(triggered()), this, SLOT(close()));
> addAction(closeAction);
> #endif
> }
> //
> -----------------------------------------------------------------------------
> WebTest_UI::~WebTest_UI() {}
> //
> -----------------------------------------------------------------------------
> WebTest_UI* WebTest_UI::Instance()
> {
> if (self == NULL)
> {
> self = new WebTest_UI();
> }
> return self;
> }
> //
> -----------------------------------------------------------------------------
> void WebTest_UI::goBack(bool b)
> {
> QList<QWebEngineHistoryItem> backHistory =
> m_WebView->history()->backItems(10000);
> QList<QWebEngineHistoryItem> forwardHistory =
> m_WebView->history()->forwardItems(10000);
> qDebug() << "Before:" << backHistory.size() << " " << forwardHistory.size();
> m_WebView->back();
> backHistory = m_WebView->history()->backItems(10000);
> forwardHistory = m_WebView->history()->forwardItems(10000);
> qDebug() << "Current History Index:" <<
> m_WebView->history()->currentItemIndex();
> qDebug() << "After:" << backHistory.size() << " " << forwardHistory.size();
> }
>
>
_______________________________________________
Interest mailing list
Interest@qt-project.org
http://lists.qt-project.org/mailman/listinfo/interest
