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#include "qmainwindow.h"

#include "qmainwindowlayout_p.h"

#ifndef QT_NO_MAINWINDOW

#include "qdockwidget.h"

#include "qtoolbar.h"

#include <qapplication.h>

#include <qmenubar.h>

#include <qstatusbar.h>

#include <qevent.h>

#include <qstyle.h>

#include <qdebug.h>

#include <qpainter.h>

#include <private/qwidget_p.h>

#include "qtoolbar_p.h"

#include "qwidgetanimator_p.h"

#ifdef Q_WS_MAC

#include <private/qt_mac_p.h>

#include <private/qt_cocoa_helpers_mac_p.h>

QT_BEGIN_NAMESPACE

extern OSWindowRef qt_mac_window_for(const QWidget *); // qwidget_mac.cpp

QT_END_NAMESPACE

#endif

QT_BEGIN_NAMESPACE

class QMainWindowPrivate : public QWidgetPrivate

{

    Q_DECLARE_PUBLIC(QMainWindow)

public:

    inline QMainWindowPrivate()

        : layout(0), explicitIconSize(false), toolButtonStyle(Qt::ToolButtonIconOnly)

#ifdef Q_WS_MAC

            , useHIToolBar(false)

#endif

#if !defined(QT_NO_DOCKWIDGET) && !defined(QT_NO_CURSOR)

            , hasOldCursor(false) , cursorAdjusted(false)

#endif

    { }

    QMainWindowLayout *layout;

    QSize iconSize;

    bool explicitIconSize;

    Qt::ToolButtonStyle toolButtonStyle;

#ifdef Q_WS_MAC

    bool useHIToolBar;

#endif

    void init();

    QList<int> hoverSeparator;

    QPoint hoverPos;

#if !defined(QT_NO_DOCKWIDGET) && !defined(QT_NO_CURSOR)

    QCursor separatorCursor(const QList<int> &path) const;

    void adjustCursor(const QPoint &pos);

    QCursor oldCursor;

    uint hasOldCursor : 1;

    uint cursorAdjusted : 1;

#endif

};

void QMainWindowPrivate::init()

{

    Q_Q(QMainWindow);

    layout = new QMainWindowLayout(q);

    const int metric = q->style()->pixelMetric(QStyle::PM_ToolBarIconSize, 0, q);

    iconSize = QSize(metric, metric);

    q->setAttribute(Qt::WA_Hover);

}

/*

    The Main Window:

    +----------------------------------------------------------+

    | Menu Bar                                                 |

    +----------------------------------------------------------+

    | Tool Bar Area                                            |

    |   +--------------------------------------------------+   |

    |   | Dock Window Area                                 |   |

    |   |   +------------------------------------------+   |   |

    |   |   |                                          |   |   |

    |   |   | Central Widget                           |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   |                                          |   |   |

    |   |   +------------------------------------------+   |   |

    |   |                                                  |   |

    |   +--------------------------------------------------+   |

    |                                                          |

    +----------------------------------------------------------+

    | Status Bar                                               |

    +----------------------------------------------------------+

*/

/*!

    \class QMainWindow

    \brief The QMainWindow class provides a main application

           window.

    \ingroup mainwindow-classes

    \tableofcontents

    \section1 Qt Main Window Framework

    A main window provides a framework for building an

    application's user interface. Qt has QMainWindow and its \l{Main

    Window and Related Classes}{related classes} for main window

    management. QMainWindow has its own layout to which you can add

    \l{QToolBar}s, \l{QDockWidget}s, a

    QMenuBar, and a QStatusBar. The layout has a center area that can

    be occupied by any kind of widget. You can see an image of the

    layout below.

    \image mainwindowlayout.png

    \note Creating a main window without a central widget is not supported.

    You must have a central widget even if it is just a placeholder.

    \section1 Creating Main Window Components

    A central widget will typically be a standard Qt widget such

    as a QTextEdit or a QGraphicsView. Custom widgets can also be

    used for advanced applications. You set the central widget with \c

    setCentralWidget().

    Main windows have either a single (SDI) or multiple (MDI)

    document interface. You create MDI applications in Qt by using a

    QMdiArea as the central widget.

    We will now examine each of the other widgets that can be

    added to a main window. We give examples on how to create and add

    them.

    \section2 Creating Menus

    Qt implements menus in QMenu and QMainWindow keeps them in a

    QMenuBar. \l{QAction}{QAction}s are added to the menus, which

    display them as menu items.

    You can add new menus to the main window's menu bar by calling

    \c menuBar(), which returns the QMenuBar for the window, and then

    add a menu with QMenuBar::addMenu().

    QMainWindow comes with a default menu bar, but you can also

    set one yourself with \c setMenuBar(). If you wish to implement a

    custom menu bar (i.e., not use the QMenuBar widget), you can set it

    with \c setMenuWidget().

    An example of how to create menus follows:

    \snippet examples/mainwindows/application/mainwindow.cpp 26

    The \c createPopupMenu() function creates popup menus when the

    main window receives context menu events.  The default

    implementation generates a menu with the checkable actions from

    the dock widgets and toolbars. You can reimplement \c

    createPopupMenu() for a custom menu.

    \section2 Creating Toolbars

    Toolbars are implemented in the QToolBar class.  You add a

    toolbar to a main window with \c addToolBar().

    You control the initial position of toolbars by assigning them

    to a specific Qt::ToolBarArea. You can split an area by inserting

    a toolbar break - think of this as a line break in text editing -

    with \c addToolBarBreak() or \c insertToolBarBreak(). You can also

    restrict placement by the user with QToolBar::setAllowedAreas()

    and QToolBar::setMovable().

    The size of toolbar icons can be retrieved with \c iconSize().

    The sizes are platform dependent; you can set a fixed size with \c

    setIconSize(). You can alter the appearance of all tool buttons in

    the toolbars with \c setToolButtonStyle().

    An example of toolbar creation follows:

    \snippet examples/mainwindows/application/mainwindow.cpp 29

    \section2 Creating Dock Widgets

    Dock widgets are implemented in the QDockWidget class. A dock

    widget is a window that can be docked into the main window.  You

    add dock widgets to a main window with \c addDockWidget().

    There are four dock widget areas as given by the

    Qt::DockWidgetArea enum: left, right, top, and bottom. You can

    specify which dock widget area that should occupy the corners

    where the areas overlap with \c setCorner(). By default

    each area can only contain one row (vertical or horizontal) of

    dock widgets, but if you enable nesting with \c

    setDockNestingEnabled(), dock widgets can be added in either

    direction.

    Two dock widgets may also be stacked on top of each other. A

    QTabBar is then used to select which of the widgets that should be

    displayed.

    We give an example of how to create and add dock widgets to a

    main window:

    \snippet doc/src/snippets/mainwindowsnippet.cpp 0

    \section2 The Status Bar

    You can set a status bar with \c setStatusBar(), but one is

    created the first time \c statusBar() (which returns the main

    window's status bar) is called. See QStatusBar for information on

    how to use it.

    \section1 Storing State

    QMainWindow can store the state of its layout with \c

    saveState(); it can later be retrieved with \c restoreState(). It

    is the position and size (relative to the size of the main window)

    of the toolbars and dock widgets that are stored.

    \sa QMenuBar, QToolBar, QStatusBar, QDockWidget, {Application

    Example}, {Dock Widgets Example}, {MDI Example}, {SDI Example},

    {Menus Example}

*/

/*!

    \fn void QMainWindow::iconSizeChanged(const QSize &iconSize)

    This signal is emitted when the size of the icons used in the

    window is changed. The new icon size is passed in \a iconSize.

    You can connect this signal to other components to help maintain

    a consistent appearance for your application.

    \sa setIconSize()

*/

/*!

    \fn void QMainWindow::toolButtonStyleChanged(Qt::ToolButtonStyle toolButtonStyle)

    This signal is emitted when the style used for tool buttons in the

    window is changed. The new style is passed in \a toolButtonStyle.

    You can connect this signal to other components to help maintain

    a consistent appearance for your application.

    \sa setToolButtonStyle()

*/

/*!

    Constructs a QMainWindow with the given \a parent and the specified

    widget \a flags.

    QMainWindow sets the Qt::Window flag itself, and will hence

    always be created as a top-level widget.

 */

QMainWindow::QMainWindow(QWidget *parent, Qt::WindowFlags flags)

    : QWidget(*(new QMainWindowPrivate()), parent, flags | Qt::Window)

{

    d_func()->init();

}

#ifdef QT3_SUPPORT

/*!

    \obsolete

    Constructs a QMainWindow with the given \a parent, \a name, and

    with the specified widget \a flags.

 */

QMainWindow::QMainWindow(QWidget *parent, const char *name, Qt::WindowFlags flags)

    : QWidget(*(new QMainWindowPrivate()), parent, flags | Qt::WType_TopLevel)

{

    setObjectName(QString::fromAscii(name));

    d_func()->init();

}

#endif

/*!

    Destroys the main window.

 */

QMainWindow::~QMainWindow()

{ }

/*! \property QMainWindow::iconSize

    \brief size of toolbar icons in this mainwindow.

    The default is the default tool bar icon size of the GUI style.

    Note that the icons used must be at least of this size as the

    icons are only scaled down.

*/

/*!

    \property QMainWindow::dockOptions

    \brief the docking behavior of QMainWindow

    \since 4.3

    The default value is AnimatedDocks | AllowTabbedDocks.

*/

/*!

    \enum QMainWindow::DockOption

    \since 4.3

    This enum contains flags that specify the docking behavior of QMainWindow.

    \value AnimatedDocks    Identical to the \l animated property.

    \value AllowNestedDocks Identical to the \l dockNestingEnabled property.

    \value AllowTabbedDocks The user can drop one dock widget "on top" of

                            another. The two widgets are stacked and a tab

                            bar appears for selecting which one is visible.

    \value ForceTabbedDocks Each dock area contains a single stack of tabbed

                            dock widgets. In other words, dock widgets cannot

                            be placed next to each other in a dock area. If

                            this option is set, AllowNestedDocks has no effect.

    \value VerticalTabs     The two vertical dock areas on the sides of the

                            main window show their tabs vertically. If this

                            option is not set, all dock areas show their tabs

                            at the bottom. Implies AllowTabbedDocks. See also

                            \l setTabPosition().

    These options only control how dock widgets may be dropped in a QMainWindow.

    They do not re-arrange the dock widgets to conform with the specified

    options. For this reason they should be set before any dock widgets

    are added to the main window. Exceptions to this are the AnimatedDocks and

    VerticalTabs options, which may be set at any time.

*/

void QMainWindow::setDockOptions(DockOptions opt)

{

    Q_D(QMainWindow);

    d->layout->setDockOptions(opt);

}

QMainWindow::DockOptions QMainWindow::dockOptions() const

{

    Q_D(const QMainWindow);

    return d->layout->dockOptions;

}

QSize QMainWindow::iconSize() const

{ return d_func()->iconSize; }

void QMainWindow::setIconSize(const QSize &iconSize)

{

    Q_D(QMainWindow);

    QSize sz = iconSize;

    if (!sz.isValid()) {

        const int metric = style()->pixelMetric(QStyle::PM_ToolBarIconSize, 0, this);

        sz = QSize(metric, metric);

    }

    if (d->iconSize != sz) {

        d->iconSize = sz;

        emit iconSizeChanged(d->iconSize);

    }

    d->explicitIconSize = iconSize.isValid();

}

/*! \property QMainWindow::toolButtonStyle

    \brief style of toolbar buttons in this mainwindow.

    The default is Qt::ToolButtonIconOnly.

*/

Qt::ToolButtonStyle QMainWindow::toolButtonStyle() const

{ return d_func()->toolButtonStyle; }

void QMainWindow::setToolButtonStyle(Qt::ToolButtonStyle toolButtonStyle)

{

    Q_D(QMainWindow);

    if (d->toolButtonStyle == toolButtonStyle)

        return;

    d->toolButtonStyle = toolButtonStyle;

    emit toolButtonStyleChanged(d->toolButtonStyle);

}

#ifndef QT_NO_MENUBAR

/*!

    Returns the menu bar for the main window. This function creates

    and returns an empty menu bar if the menu bar does not exist.

    If you want all windows in a Mac application to share one menu

    bar, don't use this function to create it, because the menu bar

    created here will have this QMainWindow as its parent.  Instead,

    you must create a menu bar that does not have a parent, which you

    can then share among all the Mac windows. Create a parent-less

    menu bar this way:

    \snippet doc/src/snippets/code/src_gui_widgets_qmenubar.cpp 1

    \sa setMenuBar()

*/

QMenuBar *QMainWindow::menuBar() const

{

    QMenuBar *menuBar = qobject_cast<QMenuBar *>(d_func()->layout->menuBar());

    if (!menuBar) {

        QMainWindow *self = const_cast<QMainWindow *>(this);

        menuBar = new QMenuBar(self);

        self->setMenuBar(menuBar);

    }

    return menuBar;

}

/*!

    Sets the menu bar for the main window to \a menuBar.

    Note: QMainWindow takes ownership of the \a menuBar pointer and

    deletes it at the appropriate time.

    \sa menuBar()

*/

void QMainWindow::setMenuBar(QMenuBar *menuBar)

{

    Q_D(QMainWindow);

    if (d->layout->menuBar() && d->layout->menuBar() != menuBar) {

        // Reparent corner widgets before we delete the old menu bar.

        QMenuBar *oldMenuBar = qobject_cast<QMenuBar *>(d->layout->menuBar());

        if (menuBar) {

            // TopLeftCorner widget.

            QWidget *cornerWidget = oldMenuBar->cornerWidget(Qt::TopLeftCorner);

            if (cornerWidget)

                menuBar->setCornerWidget(cornerWidget, Qt::TopLeftCorner);

            // TopRightCorner widget.

            cornerWidget = oldMenuBar->cornerWidget(Qt::TopRightCorner);

            if (cornerWidget)

                menuBar->setCornerWidget(cornerWidget, Qt::TopRightCorner);

        }

        oldMenuBar->hide();

        oldMenuBar->deleteLater();

    }

    d->layout->setMenuBar(menuBar);

}

/*!

    \since 4.2

    Returns the menu bar for the main window. This function returns

    null if a menu bar hasn't been constructed yet.

*/

QWidget *QMainWindow::menuWidget() const

{

    QWidget *menuBar = d_func()->layout->menuBar();

    return menuBar;

}

/*!

    \since 4.2

    Sets the menu bar for the main window to \a menuBar.

    QMainWindow takes ownership of the \a menuBar pointer and

    deletes it at the appropriate time.

*/

void QMainWindow::setMenuWidget(QWidget *menuBar)

{

    Q_D(QMainWindow);

    if (d->layout->menuBar() && d->layout->menuBar() != menuBar) {

        d->layout->menuBar()->hide();

        d->layout->menuBar()->deleteLater();

    }

    d->layout->setMenuBar(menuBar);

}

#endif // QT_NO_MENUBAR

#ifndef QT_NO_STATUSBAR

/*!

    Returns the status bar for the main window. This function creates

    and returns an empty status bar if the status bar does not exist.

    \sa setStatusBar()

*/

QStatusBar *QMainWindow::statusBar() const

{

    QStatusBar *statusbar = d_func()->layout->statusBar();

    if (!statusbar) {

        QMainWindow *self = const_cast<QMainWindow *>(this);

        statusbar = new QStatusBar(self);

        statusbar->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed);