- Qt 5.3
- Qt Quick
- Qt Quick Examples - MouseArea
- mousearea-wheel-example.qml Example File
- Qt 5.3.2 Reference Documentation

# mousearea-wheel-example.qml Example File

mousearea/mousearea-wheel-example.qml

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
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    **     of its contributors may be used to endorse or promote products derived
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    import QtQuick 2.0

    Rectangle {
        height: 700
        width: 485
        color: "#333333"

        Column {
            anchors.centerIn: parent
            spacing: 2

            Repeater {
                model: ["#9ACD32", "#EEEEEE", "#FFD700", "#87CEEB"]

                Rectangle {
                    property real scaleFactor: 1

                    height: 40 * scaleFactor
                    width: 60 * scaleFactor
                    color: modelData
                    anchors.horizontalCenter: parent.horizontalCenter

                    MouseArea {
                        anchors.fill: parent
                        onWheel: {
                            if (wheel.modifiers & Qt.ControlModifier) {
                                if (wheel.angleDelta.y > 0)
                                    parent.scaleFactor += 0.2;
                                else if (parent.scaleFactor - 0.2 >= 0.2)
                                    parent.scaleFactor -= 0.2;
                            }
                        }
                    }
                }
            }
        }

        Text {
            anchors.bottom: parent.bottom
            anchors.horizontalCenter: parent.horizontalCenter
            color: "#FFD700"
            text: "Rotate the mouse wheel pressing <Control> to resize the squares."
        }
    }