qsystemtrayicon.cpp

奇趣公司比较新的qt/emd版本

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#include "qsystemtrayicon.h"
#include "qsystemtrayicon_p.h"

#ifndef QT_NO_SYSTEMTRAYICON

#include "qmenu.h"
#include "qevent.h"
#include "qpoint.h"
#include "qlabel.h"
#include "qpushbutton.h"
#include "qpainterpath.h"
#include "qpainter.h"
#include "qstyle.h"
#include "qgridlayout.h"
#include "qapplication.h"
#include "qdesktopwidget.h"
#include "qbitmap.h"
#include "private/qlabel_p.h"
#include "qapplication.h"

/*!
    \class QSystemTrayIcon
    \brief The QSystemTrayIcon class provides an icon for an application in the system tray.
    \since 4.2
    \ingroup application
    \ingroup desktop

    Modern operating systems usually provide a special area on the desktop,
    called the \e{system tray} or \e{notification area}, where long-running
    applications can display icons and short messages.

    \image system-tray.png The system tray on Windows XP.

    The QSystemTrayIcon class can be used on the following platforms:

    \list
    \o All supported versions of Windows.
    \o All window managers for X11 that implement the \l{freedesktop.org} system
       tray specification, including recent versions of KDE and GNOME.
    \o All supported version of Mac OS X. QSystemTrayIcon::showMessage() requires 
       Growl to display messages.
    \endlist

    To check whether a system tray is present on the user's desktop,
    call the QSystemTrayIcon::isSystemTrayAvailable() static function.

    To add a system tray entry, create a QSystemTrayIcon object, call setContextMenu()
    to provide a context menu for the icon, and call show() to make it visible in the
    system tray. Status notification messages ("balloon messages") can be displayed at
    any time using showMessage().

    If the system tray is unavailable when a system tray icon is constructed, but
    becomes available later, QSystemTrayIcon will automatically add an entry for the
    application in the system tray if the icon is \l visible.

    The activated() signal is emitted when the user activates the icon.

    Only on X11, when a tooltip is requested, the QSystemTrayIcon receives a QHelpEvent
    of type QEvent::ToolTip. Additionally, the QSystemTrayIcon receives wheel events of
    type QEvent::Wheel. These are not supported on any other platform.

    \sa QDesktopServices, QDesktopWidget, {Desktop Integration}, {System Tray Icon Example}
*/

/*!
    \enum QSystemTrayIcon::MessageIcon

    This enum describes the icon that is shown when a balloon message is displayed.

    \value NoIcon      No icon is shown.
    \value Information An information icon is shown.
    \value Warning     A standard warning icon is shown.
    \value Critical    A critical warning icon is shown.

    \sa QMessageBox
*/

/*!
    Constructs a QSystemTrayIcon object with the given \a parent.

    The icon is initially invisible.

    \sa visible
*/
QSystemTrayIcon::QSystemTrayIcon(QObject *parent)
: QObject(*new QSystemTrayIconPrivate(), parent)
{
}

/*!
    Constructs a QSystemTrayIcon object with the given \a icon and \a parent.

    The icon is initially invisible.

    \sa visible
*/
QSystemTrayIcon::QSystemTrayIcon(const QIcon &icon, QObject *parent)
: QObject(*new QSystemTrayIconPrivate(), parent)
{
    setIcon(icon);
}

/*!
    Removes the icon from the system tray and frees all allocated resources.
*/
QSystemTrayIcon::~QSystemTrayIcon()
{
    Q_D(QSystemTrayIcon);
    d->remove_sys();
}

#ifndef QT_NO_MENU

/*!
    Sets the specified \a menu to be the context menu for the system tray icon.

    The menu will pop up when the user requests the context menu for the system
    tray icon by clicking the mouse button.

    On Mac OS X, this is currenly converted to a NSMenu, so the
    aboutToHide() signal is not emitted.

    \note The system tray icon does not take ownership of the menu. You must
    ensure that it is deleted at the appropriate time by, for example, creating
    the menu with a suitable parent object.
*/
void QSystemTrayIcon::setContextMenu(QMenu *menu)
{
    Q_D(QSystemTrayIcon);
    d->menu = menu;
    d->updateMenu_sys();
}

/*!
    Returns the current context menu for the system tray entry.
*/
QMenu* QSystemTrayIcon::contextMenu() const
{
    Q_D(const QSystemTrayIcon);
    return d->menu;
}

#endif // QT_NO_MENU

/*!
    \property QSystemTrayIcon::icon
    \brief the system tray icon

    On Windows, the system tray icon size is 16x16; on X11, the preferred size is
    22x22. The icon will be scaled to the appropriate size as necessary.
*/
void QSystemTrayIcon::setIcon(const QIcon &icon)
{
    Q_D(QSystemTrayIcon);
    d->icon = icon;
    d->updateIcon_sys();
}

QIcon QSystemTrayIcon::icon() const
{
    Q_D(const QSystemTrayIcon);
    return d->icon;
}

/*!
    \property QSystemTrayIcon::toolTip
    \brief the tooltip for the system tray entry

    On some systems, the tooltip's length is limited. The tooltip will be truncated
    if necessary.
*/
void QSystemTrayIcon::setToolTip(const QString &tooltip)
{
    Q_D(QSystemTrayIcon);
    d->toolTip = tooltip;
    d->updateToolTip_sys();
}

QString QSystemTrayIcon::toolTip() const
{
    Q_D(const QSystemTrayIcon);
    return d->toolTip;
}

/*!
    \fn void QSystemTrayIcon::show()

    Shows the icon in the system tray.

    \sa hide(), visible
*/

/*!
    \fn void QSystemTrayIcon::hide()

    Hides the system tray entry.

    \sa show(), visible
*/

/*!
    \since 4.3
    Returns the geometry of the system tray icon in screen coordinates.

    \sa visible
*/
QRect QSystemTrayIcon::geometry() const
{
    Q_D(const QSystemTrayIcon);
    if (!d->visible)
        return QRect();
    return d->geometry_sys();
}

/*!
    \property QSystemTrayIcon::visible
    \brief whether the system tray entry is visible

    Setting this property to true or calling show() makes the system tray icon
    visible; setting this property to false or calling hide() hides it.
*/
void QSystemTrayIcon::setVisible(bool visible)
{
    Q_D(QSystemTrayIcon);
    if (visible == d->visible)
        return;
    if (d->icon.isNull() && visible)
        qWarning("QSystemTrayIcon::setVisible: No Icon set");
    d->visible = visible;
    if (d->visible)
        d->install_sys();
    else
        d->remove_sys();
}

bool QSystemTrayIcon::isVisible() const
{
    Q_D(const QSystemTrayIcon);
    return d->visible;
}

/*!
  \reimp
*/
bool QSystemTrayIcon::event(QEvent *e)
{
#if defined(Q_WS_X11)
    if (e->type() == QEvent::ToolTip) {
        Q_D(QSystemTrayIcon);
        return d->sys->deliverToolTipEvent(e);
    }
#endif
    return QObject::event(e);
}

/*!
    \enum QSystemTrayIcon::ActivationReason

     This enum describes the reason the system tray was activated.

     \value Unknown     Unknown reason
     \value Context     The context menu for the system tray entry was requested
     \value DoubleClick The system tray entry was double clicked
     \value Trigger     The system tray entry was clicked
     \value MiddleClick The system tray entry was clicked with the middle mouse button

     \sa activated()
*/

/*!