- Qt 5.5
- Qt Quick
- UI Components: Dial Control Example
- dialcontrol.qml Example File
- Qt 5.5.1 Reference Documentation

# dialcontrol.qml Example File

customitems/dialcontrol/dialcontrol.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
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    import QtQuick 2.2
    import QtQuick.Window 2.1
    import "content"

    Rectangle {
        color: "#545454"
        width: 300; height: 300

        // Dial with a slider to adjust it
        Dial {
            id: dial
            anchors.centerIn: parent
            value: slider.x * 100 / (container.width - 32)
        }

        Rectangle {
            id: container
            property int oldWidth: 0
            anchors { bottom: parent.bottom; left: parent.left
                right: parent.right; leftMargin: 20; rightMargin: 20
                bottomMargin: 10
            }
            height: 16

            radius: 8
            opacity: 0.7
            antialiasing: true
            gradient: Gradient {
                GradientStop { position: 0.0; color: "gray" }
                GradientStop { position: 1.0; color: "white" }
            }

            onWidthChanged: {
                if (oldWidth === 0) {
                    oldWidth = width;
                    return
                }

                var desiredPercent = slider.x * 100 / (oldWidth - 32)
                slider.x = desiredPercent * (width - 32) / 100
                oldWidth = width
            }

            Rectangle {
                id: slider
                x: 1; y: 1; width: 30; height: 14
                radius: 6
                antialiasing: true
                gradient: Gradient {
                    GradientStop { position: 0.0; color: "#424242" }
                    GradientStop { position: 1.0; color: "black" }
                }

                MouseArea {
                    anchors.fill: parent
                    anchors.margins: -16 // Increase mouse area a lot outside the slider
                    drag.target: parent; drag.axis: Drag.XAxis
                    drag.minimumX: 2; drag.maximumX: container.width - 32
                }
            }
        }
        QuitButton {
            anchors.right: parent.right
            anchors.top: parent.top
            anchors.margins: 10
        }
    }