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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://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
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** 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 wearable
\keyword Qt Quick Controls - Wearable Demo
\title Qt Quick Controls - Wearable Demo
\keyword Qt Quick Controls 2 - Wearable Demo
\ingroup qtquickcontrols2-examples
\brief Demonstrates an application launcher designed for wearable devices.
\image qtquickcontrols2-wearable.png
The \e {Wearable Demo} consists of an application launcher and a collection
of small and simple example applications aimed at wearable devices.
\section1 Structure
The main .qml file, \c wearable.qml, consists of an ApplicationWindow, a StackView
for a stack-based navigation model, and buttons for interactive navigation.
\quotefromfile wearable/wearable.qml
\skipuntil import "qml/Style"
\printuntil id: window
\dots
\skipto header
\printuntil id: homeButton
\dots 8
\skipto onClicked
\printuntil }
\printuntil id: backButton
\dots 8
\skipto onClicked
\printuntil id: stackView
\dots 8
\skipuntil initialItem
\printuntil /^\}/
\section1 Styling
The demo uses a custom \l {Styling Qt Quick Controls 2}{Qt Quick Controls 2 style}
embedded into the demo's resources. The custom style is implemented for a
few controls only, as it is specific to this particular demo. It uses a
singleton type for various styling attributes, such as fonts and colors.
\list
\li \c qml/Style/PageIndicator.qml
\li \c qml/Style/Slider.qml
\li \c qml/Style/Switch.qml
\li \c qml/Style/UIStyle.qml
\endlist
The style is applied in \c main() in \c wearable.cpp:
\snippet wearable/wearable.cpp style
The main benefit of using the built-in styling system is that the style selection
is fully transparent to the application code. There is no need to import a specific
folder that contains the styled controls. This way, the application can be run with
other styles too.
\section1 Custom Type
The demo application contains a custom button type implemented in
\c qml/NaviButton.qml. The navigation button is used as a home and back
button in \c wearable.qml. \c NaviButton extends the AbstractButton type
with properties that control the slide in and slide out transitions and
the button image.
\quotefromfile wearable/qml/NaviButton.qml
\skipuntil import "Style"
\printuntil id: image
\dots 8
\skipuntil }
\printuntil background:
\dots 8
\skipto }
\printuntil /^\}/
\section1 Icons
The demo ships a custom icon theme. The icons are bundled into the \c :/icons
folder in the application's resources. The \c index.theme file lists the contents
of the icon theme:
\quotefile wearable/icons/wearable/index.theme
Finally, the icon theme is selected in \c main():
\snippet wearable/wearable.cpp icons
The icons are used on the Launcher Page, which is presented below. See
\l {Icons in Qt Quick Controls 2} for more details about icons and themes.
\section1 Launcher Page
The application launcher is implemented using a circular PathView in
\c LauncherPage.qml. Each application is in a separate .qml file,
which is added to the ListModel on the launcher page.
\quotefromfile wearable/qml/LauncherPage.qml
\skipto PathView
\printuntil signal launched
\dots
\skipto ListModel
\printuntil }
\dots 8
\printline ListElement
\skipto "Settings"
\printuntil delegate:
\dots 8
\skipto icon.width
\printuntil icon.name
\dots 8
\skipto onClicked:
\printto path:
\dots
\skipto /^\}/
\printline }
\section1 Applications
The applications are designed for touch input based on what input methods
or communication means are typically offered by wearable devices.
Most applications have their own JavaScript files that act as dummy
application backends. They illustrate fetching external data and help
manipulating or converting the data. In the \c Navigation and \c Weather
applications, data acquisition is implemented using \l XMLHttpRequest to
read from local files. These files were generated by storing responses from
remote servers in JSON format. This code can be easily modified to acquire
data from remote servers.
\section2 Navigation
This application displays a walking route from source to destination. This
route information is obtained using the REST API provided by
\l {https://www.openstreetmap.org/}. The API response is in JSON format, which
is parsed using JavaScript by the application. Currently, it is not possible
to specify the source and destination from within the application, but it can
be added based on the device's capabilities. For example, user input
could be implemented as screens with input fields, or can be communicated
over Bluetooth/Wifi from a paired application running on another device
such as a smart phone or PC.
\section2 Weather
This application displays weather information such as temperature, sunrise
and sunset times, air pressure, and so on. This information is obtained
from \l {https://openweathermap.org/} using its REST API. The API response is
in JSON format, which is parsed using JavaScript by the application. This
application can also be modified by adding screens to obtain weather data for
a given location.
\section2 World Clock
This application displays a world clock for different cities. As of now, the
list of cities is hard-coded in the application, but that can be changed based
on the input capabilities of the device.
\section2 Others
The remaining applications return static data for now, but they can be
modified to process response data obtained from respective services.
\include examples-run.qdocinc
*/
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