- Qt 5.5
- Qt Canvas 3D
- One Qt Example
- SwipeArea.qml Example File
- Qt 5.5.1 Reference Documentation

# SwipeArea.qml Example File

canvas3d/threejs/oneqt/SwipeArea.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the QtCanvas3D module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL3$
    ** 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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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 3 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.LGPLv3 included in the
    ** packaging of this file. Please review the following information to
    ** ensure the GNU Lesser General Public License version 3 requirements
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    ** GNU General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU
    ** General Public License version 2.0 or later as published by the Free
    ** Software Foundation and appearing in the file LICENSE.GPL included in
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    import QtQuick 2.0

    MouseArea {
        id: mouseSwipeArea
        preventStealing: true

        property real prevX: 0
        property real prevY: 0
        property real velocityX: 0.0
        property real velocityY: 0.0
        property int startX: 0
        property int startY: 0
        property bool tracing: false

        signal swipeLeft()
        signal swipeRight()
        signal swipeUp()
        signal swipeDown()

        onPressed: {
            startX = mouse.x
            startY = mouse.y
            prevX = mouse.x
            prevY = mouse.y
            velocityX = 0
            velocityY = 0
            tracing = true
        }

        onPositionChanged: {
            if ( !tracing ) return
            var currVelX = (mouse.x-prevX)
            var currVelY = (mouse.y-prevY)

            velocityX = (velocityX + currVelX)/2.0;
            velocityY = (velocityY + currVelY)/2.0;

            prevX = mouse.x
            prevY = mouse.y

            if ( velocityX > 15 && mouse.x > mouseSwipeArea.width * 0.25 ) {
                tracing = false
                // Swipe Right
                mouseSwipeArea.swipeRight()
            } else if ( velocityX < -15 && mouse.x < mouseSwipeArea.width * 0.75 ) {
                tracing = false
                // Swipe Left
                mouseSwipeArea.swipeLeft()
            } else if (velocityY > 15 && mouse.y > mouseSwipeArea.height * 0.25 ) {
                tracing = false
                // Swipe Down
                mouseSwipeArea.swipeDown()
            } else if ( velocityY < -15 && mouse.y < mouseSwipeArea.height * 0.75 ) {
                tracing = false
                // Swipe Up
                mouseSwipeArea.swipeUp()
            }
        }
    }