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/****************************************************************************
**
** Copyright (C) 2018 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the documentation of the Pelagicore Application Manager.
**
** $QT_BEGIN_LICENSE:FDL-QTAS$
** Commercial License Usage
** Licensees holding valid commercial Qt Automotive Suite 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 https://www.qt.io/terms-conditions.
** For further information use the contact form at https://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: https://www.gnu.org/licenses/fdl-1.3.html.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\example applicationmanager/animated-windows
\title Animated Windows System-UI Example
\image animated-windows-example.jpg The "Animated Windows" example with two applications running.
\brief How to animate the appearance and disappearance of windows.
\ingroup applicationmanager-examples
This example shows you how to animate the appearance and disappearance of windows in a System-UI. It
assumes you're already familiar with the concepts and topics introduced in the \l {"Hello World!"
System-UI Example}.
Unlike our \l {"Hello World!" System-UI Example} {Hello World} example, most graphical user interfaces
avoid making sudden, abrupt, changes since they can confuse the user and are not visually pleasant. So
when a new WindowObject is created by the WindowManager we want to animate its appearance instead of
simply having it popping up on the screen. Likewise, once a WindowObject loses its surface (because
the application closed this window or stopped altogether) and is thus removed from WindowManager's
model we want to animate its disappearance instead of having it vanish immediately.
If you are using a ready-made, advanced, layout such as ListView, you can assign Transitions to
different actions like add, remove, displaced, etc and keep using WindowManager as your model.
But in many situations this is not the case and thus you will have to create your own separate model
(a ListModel should suffice), so that a WindowObject only leaves it once you have finished animating
the disappearance of its delegate. This example showcases such a technique.
\section1 The windows model
The key point in this example is the model we use for instantiating our \l{WindowItem}{windows}.
Instead of using WindowManager directly as our model we use a plain ListModel:
\quotefromfile applicationmanager/animated-windows/system-ui/main.qml
\skipto Each WindowObject
\skipline Each WindowObject
\printuntil delegate: Rectangle
We remove a WindowObject from that model only after is has reached its end state (WindowObject.NoSurface)
and it's no longer being shown on screen (any state transition has already finished).
\skipto property bool safeToRemove
\printuntil onSafeToRemoveChanged
And we add a WindowObject to it (and hence have it displayed on screen) as soon as WindowManager creates one.
\skipto Connections
\printuntil /\s+\}/
*/
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