tabwidget.cpp Example File

webenginewidgets/simplebrowser/tabwidget.cpp
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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
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** This file is part of the examples of the Qt Toolkit.
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#include "tabwidget.h"
#include "webpage.h"
#include "webview.h"
#include <QMenu>
#include <QTabBar>
#include <QWebEngineProfile>

TabWidget::TabWidget(QWidget *parent)
    : QTabWidget(parent)
{
    QTabBar *tabBar = this->tabBar();
    tabBar->setTabsClosable(true);
    tabBar->setSelectionBehaviorOnRemove(QTabBar::SelectPreviousTab);
    tabBar->setMovable(true);
    tabBar->setContextMenuPolicy(Qt::CustomContextMenu);
    connect(tabBar, &QTabBar::customContextMenuRequested, this, &TabWidget::handleContextMenuRequested);
    connect(tabBar, &QTabBar::tabCloseRequested, this, &TabWidget::closeTab);
    connect(tabBar, &QTabBar::tabBarDoubleClicked, [this](int index) {
        if (index != -1)
            return;
        createTab();
    });

    setDocumentMode(true);
    setElideMode(Qt::ElideRight);

    connect(this, &QTabWidget::currentChanged, this, &TabWidget::handleCurrentChanged);
}

TabWidget::~TabWidget()
{
}

void TabWidget::handleCurrentChanged(int index)
{
    if (index != -1) {
        WebView *view = webView(index);
        if (!view->url().isEmpty())
            view->setFocus();
        emit titleChanged(view->title());
        emit loadProgress(view->loadProgress());
        emit urlChanged(view->url());
        QIcon pageIcon = view->page()->icon();
        if (!pageIcon.isNull())
            emit iconChanged(pageIcon);
        else
            emit iconChanged(QIcon(QStringLiteral(":defaulticon.png")));
        emit webActionEnabledChanged(QWebEnginePage::Back, view->isWebActionEnabled(QWebEnginePage::Back));
        emit webActionEnabledChanged(QWebEnginePage::Forward, view->isWebActionEnabled(QWebEnginePage::Forward));
        emit webActionEnabledChanged(QWebEnginePage::Stop, view->isWebActionEnabled(QWebEnginePage::Stop));
        emit webActionEnabledChanged(QWebEnginePage::Reload,view->isWebActionEnabled(QWebEnginePage::Reload));
    } else {
        emit titleChanged(QString());
        emit loadProgress(0);
        emit urlChanged(QUrl());
        emit iconChanged(QIcon(QStringLiteral(":defaulticon.png")));
        emit webActionEnabledChanged(QWebEnginePage::Back, false);
        emit webActionEnabledChanged(QWebEnginePage::Forward, false);
        emit webActionEnabledChanged(QWebEnginePage::Stop, false);
        emit webActionEnabledChanged(QWebEnginePage::Reload, true);
    }
}

void TabWidget::handleContextMenuRequested(const QPoint &pos)
{
    QMenu menu;
    menu.addAction(tr("New &Tab"), this, &TabWidget::createTab, QKeySequence::AddTab);
    int index = tabBar()->tabAt(pos);
    if (index != -1) {
        QAction *action = menu.addAction(tr("Clone Tab"));
        connect(action, &QAction::triggered, this, [this,index]() {
            cloneTab(index);
        });
        menu.addSeparator();
        action = menu.addAction(tr("&Close Tab"));
        action->setShortcut(QKeySequence::Close);
        connect(action, &QAction::triggered, this, [this,index]() {
            closeTab(index);
        });
        action = menu.addAction(tr("Close &Other Tabs"));
        connect(action, &QAction::triggered, this, [this,index]() {
            closeOtherTabs(index);
        });
        menu.addSeparator();
        action = menu.addAction(tr("Reload Tab"));
        action->setShortcut(QKeySequence::Refresh);
        connect(action, &QAction::triggered, this, [this,index]() {
            reloadTab(index);
        });
    } else {
        menu.addSeparator();
    }
    menu.addAction(tr("Reload All Tabs"), this, &TabWidget::reloadAllTabs);
    menu.exec(QCursor::pos());
}

WebView *TabWidget::currentWebView() const
{
    return webView(currentIndex());
}

WebView *TabWidget::webView(int index) const
{
    return qobject_cast<WebView*>(widget(index));
}

void TabWidget::setupView(WebView *webView)
{
    QWebEnginePage *webPage = webView->page();

    connect(webView, &QWebEngineView::titleChanged, [this, webView](const QString &title) {
        int index = indexOf(webView);
        if (index != -1)
            setTabText(index, title);
        if (currentIndex() == index)
            emit titleChanged(title);
    });
    connect(webView, &QWebEngineView::urlChanged, [this, webView](const QUrl &url) {
        int index = indexOf(webView);
        if (index != -1)
            tabBar()->setTabData(index, url);
        if (currentIndex() == index)
            emit urlChanged(url);
    });
    connect(webView, &QWebEngineView::loadProgress, [this, webView](int progress) {
        if (currentIndex() == indexOf(webView))
            emit loadProgress(progress);
    });
    connect(webPage, &QWebEnginePage::linkHovered, [this, webView](const QString &url) {
        if (currentIndex() == indexOf(webView))
            emit linkHovered(url);
    });
    connect(webPage, &WebPage::iconChanged, [this, webView](const QIcon &icon) {
        int index = indexOf(webView);
        QIcon ico = icon.isNull() ? QIcon(QStringLiteral(":defaulticon.png")) : icon;

        if (index != -1)
            setTabIcon(index, ico);
        if (currentIndex() == index)
            emit iconChanged(ico);
    });
    connect(webView, &WebView::webActionEnabledChanged, [this, webView](QWebEnginePage::WebAction action, bool enabled) {
        if (currentIndex() ==  indexOf(webView))
            emit webActionEnabledChanged(action,enabled);
    });
    connect(webView, &QWebEngineView::loadStarted, [this, webView]() {
        int index = indexOf(webView);
        if (index != -1) {
            QIcon icon(QLatin1String(":view-refresh.png"));
            setTabIcon(index, icon);
        }
    });
    connect(webPage, &QWebEnginePage::windowCloseRequested, [this, webView]() {
        int index = indexOf(webView);
        if (index >= 0)
            closeTab(index);
    });
}

WebView *TabWidget::createTab(bool makeCurrent)
{
    WebView *webView = new WebView;
    WebPage *webPage = new WebPage(QWebEngineProfile::defaultProfile(), webView);
    webView->setPage(webPage);
    setupView(webView);
    addTab(webView, tr("(Untitled)"));
    if (makeCurrent)
        setCurrentWidget(webView);
    return webView;
}

void TabWidget::reloadAllTabs()
{
    for (int i = 0; i < count(); ++i)
        webView(i)->reload();
}

void TabWidget::closeOtherTabs(int index)
{
    for (int i = count() - 1; i > index; --i)
        closeTab(i);
    for (int i = index - 1; i >= 0; --i)
        closeTab(i);
}

void TabWidget::closeTab(int index)
{
    if (WebView *view = webView(index)) {
        bool hasFocus = view->hasFocus();
        removeTab(index);
        if (hasFocus && count() > 0)
            currentWebView()->setFocus();
        if (count() == 0)
            createTab();
        view->deleteLater();
    }
}

void TabWidget::cloneTab(int index)
{
    if (WebView *view = webView(index)) {
        WebView *tab = createTab(false);
        tab->setUrl(view->url());
    }
}

void TabWidget::setUrl(const QUrl &url)
{
    if (WebView *view = currentWebView()) {
        view->setUrl(url);
        view->setFocus();
    }
}

void TabWidget::triggerWebPageAction(QWebEnginePage::WebAction action)
{
    if (WebView *webView = currentWebView()) {
        webView->triggerPageAction(action);
        webView->setFocus();
    }
}

void TabWidget::nextTab()
{
    int next = currentIndex() + 1;
    if (next == count())
        next = 0;
    setCurrentIndex(next);
}

void TabWidget::previousTab()
{
    int next = currentIndex() - 1;
    if (next < 0)
        next = count() - 1;
    setCurrentIndex(next);
}

void TabWidget::reloadTab(int index)
{
    if (WebView *view = webView(index))
        view->reload();
}

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.