Long live Qt 4.5!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TABWIDGET_H
+#define TABWIDGET_H
+
+#include <QtGui/QTabBar>
+
+#include <QtGui/QShortcut>
+/*
+    Tab bar with a few more features such as a context menu and shortcuts
+ */
+class TabBar : public QTabBar
+{
+    Q_OBJECT
+
+signals:
+    void newTab();
+    void cloneTab(int index);
+    void closeTab(int index);
+    void closeOtherTabs(int index);
+    void reloadTab(int index);
+    void reloadAllTabs();
+    void tabMoveRequested(int fromIndex, int toIndex);
+
+public:
+    TabBar(QWidget *parent = 0);
+
+protected:
+    void mousePressEvent(QMouseEvent* event);
+    void mouseMoveEvent(QMouseEvent* event);
+
+private slots:
+    void selectTabAction();
+    void cloneTab();
+    void closeTab();
+    void closeOtherTabs();
+    void reloadTab();
+    void contextMenuRequested(const QPoint &position);
+
+private:
+    QList<QShortcut*> m_tabShortcuts;
+    friend class TabWidget;
+
+    QPoint m_dragStartPos;
+    int m_dragCurrentIndex;
+};
+
+#include <QtWebKit/QWebPage>
+
+QT_BEGIN_NAMESPACE
+class QAction;
+QT_END_NAMESPACE
+class WebView;
+/*!
+    A proxy object that connects a single browser action
+    to one child webpage action at a time.
+
+    Example usage: used to keep the main window stop action in sync with
+    the current tabs webview's stop action.
+ */
+class WebActionMapper : public QObject
+{
+    Q_OBJECT
+
+public:
+    WebActionMapper(QAction *root, QWebPage::WebAction webAction, QObject *parent);
+    QWebPage::WebAction webAction() const;
+    void addChild(QAction *action);
+    void updateCurrent(QWebPage *currentParent);
+
+private slots:
+    void rootTriggered();
+    void childChanged();
+    void rootDestroyed();
+    void currentDestroyed();
+
+private:
+    QWebPage *m_currentParent;
+    QAction *m_root;
+    QWebPage::WebAction m_webAction;
+};
+
+#include <QtCore/QUrl>
+#include <QtGui/QTabWidget>
+QT_BEGIN_NAMESPACE
+class QCompleter;
+class QLineEdit;
+class QMenu;
+class QStackedWidget;
+QT_END_NAMESPACE
+/*!
+    TabWidget that contains WebViews and a stack widget of associated line edits.
+
+    Connects up the current tab's signals to this class's signal and uses WebActionMapper
+    to proxy the actions.
+ */
+class TabWidget : public QTabWidget
+{
+    Q_OBJECT
+
+signals:
+    // tab widget signals
+    void loadPage(const QString &url);
+    void tabsChanged();
+    void lastTabClosed();
+
+    // current tab signals
+    void setCurrentTitle(const QString &url);
+    void showStatusBarMessage(const QString &message);
+    void linkHovered(const QString &link);
+    void loadProgress(int progress);
+    void geometryChangeRequested(const QRect &geometry);
+    void menuBarVisibilityChangeRequested(bool visible);
+    void statusBarVisibilityChangeRequested(bool visible);
+    void toolBarVisibilityChangeRequested(bool visible);
+    void printRequested(QWebFrame *frame);
+
+public:
+    TabWidget(QWidget *parent = 0);
+    void clear();
+    void addWebAction(QAction *action, QWebPage::WebAction webAction);
+
+    QAction *newTabAction() const;
+    QAction *closeTabAction() const;
+    QAction *recentlyClosedTabsAction() const;
+    QAction *nextTabAction() const;
+    QAction *previousTabAction() const;
+
+    QWidget *lineEditStack() const;
+    QLineEdit *currentLineEdit() const;
+    WebView *currentWebView() const;
+    WebView *webView(int index) const;
+    QLineEdit *lineEdit(int index) const;
+    int webViewIndex(WebView *webView) const;
+
+    QByteArray saveState() const;
+    bool restoreState(const QByteArray &state);
+
+protected:
+    void mouseDoubleClickEvent(QMouseEvent *event);
+    void contextMenuEvent(QContextMenuEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+
+public slots:
+    void loadUrlInCurrentTab(const QUrl &url);
+    WebView *newTab(bool makeCurrent = true);
+    void cloneTab(int index = -1);
+    void closeTab(int index = -1);
+    void closeOtherTabs(int index);
+    void reloadTab(int index = -1);
+    void reloadAllTabs();
+    void nextTab();
+    void previousTab();
+
+private slots:
+    void currentChanged(int index);
+    void aboutToShowRecentTabsMenu();
+    void aboutToShowRecentTriggeredAction(QAction *action);
+    void webViewLoadStarted();
+    void webViewIconChanged();
+    void webViewTitleChanged(const QString &title);
+    void webViewUrlChanged(const QUrl &url);
+    void lineEditReturnPressed();
+    void windowCloseRequested();
+    void moveTab(int fromIndex, int toIndex);
+
+private:
+    QAction *m_recentlyClosedTabsAction;
+    QAction *m_newTabAction;
+    QAction *m_closeTabAction;
+    QAction *m_nextTabAction;
+    QAction *m_previousTabAction;
+
+    QMenu *m_recentlyClosedTabsMenu;
+    static const int m_recentlyClosedTabsSize = 10;
+    QList<QUrl> m_recentlyClosedTabs;
+    QList<WebActionMapper*> m_actions;
+
+    QCompleter *m_lineEditCompleter;
+    QStackedWidget *m_lineEdits;
+    TabBar *m_tabBar;
+};
+
+#endif // TABWIDGET_H
+