Remove systray.qdoc and images.

The system tray example initially was in QtSvg after the Qt 5
modularization split since it depended on it. In the meantime, it
has been moved back to qtbase.

Change-Id: I6337ba71d5f53680ead7db4a52049407c88275cf
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>

3 files changed, 0 insertions, 183 deletions

diff --git a/doc/src/examples/systray.qdoc b/doc/src/examples/systray.qdoc
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-/****************************************************************************
-**
-** Copyright (C) 2015 The Qt Company Ltd.
-** Contact: http://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:FDL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see http://www.qt.io/terms-conditions. For further
-** information use the contact form at http://www.qt.io/contact-us.
-**
-** GNU Free Documentation License Usage
-** Alternatively, this file may be used under the terms of the GNU Free
-** Documentation License version 1.3 as published by the Free Software
-** Foundation and appearing in the file included in the packaging of
-** this file. Please review the following information to ensure
-** the GNU Free Documentation License version 1.3 requirements
-** will be met: http://www.gnu.org/copyleft/fdl.html.
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-/*!
-    \example desktop/systray
-    \title System Tray Icon Example
-
-
-    The System Tray Icon example shows how to add an icon with a menu
-    and popup messages to a desktop environment's system tray.
-
-    \image systemtray-example.png Screenshot of the System Tray Icon.
-
-    Modern operating systems usually provide a special area on the
-    desktop, called the system tray or notification area, where
-    long-running applications can display icons and short messages.
-
-    This example consists of one single class, \c Window, providing
-    the main application window (i.e., an editor for the system tray
-    icon) and the associated icon.
-
-    \image systemtray-editor.png
-
-    The editor allows the user to choose the preferred icon as well as
-    set the balloon message's type and duration. The user can also
-    edit the message's title and body. Finally, the editor provide a
-    checkbox controlling whether the icon is actually shown in the
-    system tray, or not.
-
-    \section1 Window Class Definition
-
-    The \c Window class inherits QWidget:
-
-    \snippet examples/desktop/systray/window.h 0
-
-    We implement several private slots to respond to user
-    interaction. The other private functions are only convenience
-    functions provided to simplify the constructor.
-
-    The tray icon is an instance of the QSystemTrayIcon class. To
-    check whether a system tray is present on the user's desktop, call
-    the static QSystemTrayIcon::isSystemTrayAvailable()
-    function. Associated with the icon, we provide a menu containing
-    the typical \gui minimize, \gui maximize, \gui restore and \gui
-    quit actions. We reimplement the QWidget::setVisible() function to
-    update the tray icon's menu whenever the editor's appearance
-    changes, e.g., when maximizing or minimizing the main application
-    window.
-
-    Finally, we reimplement QWidget's \l {QWidget::}{closeEvent()}
-    function to be able to inform the user (when closing the editor
-    window) that the program will keep running in the system tray
-    until the user chooses the \gui Quit entry in the icon's context
-    menu.
-
-    \section1 Window Class Implementation
-
-    When constructing the editor widget, we first create the various
-    editor elements before we create the actual system tray icon:
-
-    \snippet examples/desktop/systray/window.cpp 0
-
-    We ensure that the application responds to user input by
-    connecting most of the editor's input widgets (including the
-    system tray icon) to the application's private slots. But note the
-    visibility checkbox; its \l {QCheckBox::}{toggled()} signal is
-    connected to the \e {icon}'s \l {QSystemTrayIcon::}{setVisible()}
-    function instead.
-
-    \snippet examples/desktop/systray/window.cpp 3
-
-    The \c setIcon() slot is triggered whenever the current index in
-    the icon combobox changes, i.e., whenever the user chooses another
-    icon in the editor. Note that it is also called when the user
-    activates the tray icon with the left mouse button, triggering the
-    icon's \l {QSystemTrayIcon::}{activated()} signal. We will come
-    back to this signal shortly.
-
-    The QSystemTrayIcon::setIcon() function sets the \l
-    {QSystemTrayIcon::}{icon} property that holds the actual 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.
-
-    Note that on X11, due to a limitation in the system tray
-    specification, mouse clicks on transparent areas in the icon are
-    propagated to the system tray. If this behavior is unacceptable,
-    we suggest using an icon with no transparency.
-
-    \snippet examples/desktop/systray/window.cpp 4
-
-    Whenever the user activates the system tray icon, it emits its \l
-    {QSystemTrayIcon::}{activated()} signal passing the triggering
-    reason as parameter. QSystemTrayIcon provides the \l
-    {QSystemTrayIcon::}{ActivationReason} enum to describe how the
-    icon was activated.
-
-    In the constructor, we connected our icon's \l
-    {QSystemTrayIcon::}{activated()} signal to our custom \c
-    iconActivated() slot: If the user has clicked the icon using the
-    left mouse button, this function changes the icon image by
-    incrementing the icon combobox's current index, triggering the \c
-    setIcon() slot as mentioned above. If the user activates the icon
-    using the middle mouse button, it calls the custom \c
-    showMessage() slot:
-
-    \snippet examples/desktop/systray/window.cpp 5
-
-    When the \e showMessage() slot is triggered, we first retrieve the
-    message icon depending on the currently chosen message type. The
-    QSystemTrayIcon::MessageIcon enum describes the icon that is shown
-    when a balloon message is displayed. Then we call
-    QSystemTrayIcon's \l {QSystemTrayIcon::}{showMessage()} function
-    to show the message with the title, body, and icon for the time
-    specified in milliseconds.
-    
-    Mac OS X users note: The Growl notification system must be
-    installed for QSystemTrayIcon::showMessage() to display messages.
-
-    QSystemTrayIcon also has the corresponding, \l {QSystemTrayIcon::}
-    {messageClicked()} signal, which is emitted when the user clicks a
-    message displayed by \l {QSystemTrayIcon::}{showMessage()}.
-
-    \snippet examples/desktop/systray/window.cpp 6
-
-    In the constructor, we connected the \l
-    {QSystemTrayIcon::}{messageClicked()} signal to our custom \c
-    messageClicked() slot that simply displays a message using the
-    QMessageBox class.
-
-    QMessageBox provides a modal dialog with a short message, an icon,
-    and buttons laid out depending on the current style. It supports
-    four severity levels: "Question", "Information", "Warning" and
-    "Critical". The easiest way to pop up a message box in Qt is to
-    call one of the associated static functions, e.g.,
-    QMessageBox::information().
-
-    As we mentioned earlier, we reimplement a couple of QWidget's
-    virtual functions:
-
-    \snippet examples/desktop/systray/window.cpp 1
-
-    Our reimplementation of the QWidget::setVisible() function updates
-    the tray icon's menu whenever the editor's appearance changes,
-    e.g., when maximizing or minimizing the main application window,
-    before calling the base class implementation.
-
-    \snippet examples/desktop/systray/window.cpp 2
-
-    We have reimplemented the QWidget::closeEvent() event handler to
-    receive widget close events, showing the above message to the
-    users when they are closing the editor window.
-
-    In addition to the functions and slots discussed above, we have
-    also implemented several convenience functions to simplify the
-    constructor: \c createIconGroupBox(), \c createMessageGroupBox(),
-    \c createActions() and \c createTrayIcon(). See the \l
-    {desktop/systray/window.cpp}{window.cpp} file for details.
-*/
diff --git a/doc/src/images/systemtray-editor.png b/doc/src/images/systemtray-editor.png
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diff --git a/doc/src/images/systemtray-example.png b/doc/src/images/systemtray-example.png
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