CircularGaugeView.qml Example File

gallery/qml/CircularGaugeView.qml
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt 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.
**
** BSD License Usage
** Alternatively, 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
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick 2.2
import QtQuick.Controls 1.1
import QtQuick.Extras 1.4

ControlView {
    id: controlView
    darkBackground: customizerItem.currentStyleDark

    property color fontColor: darkBackground ? "white" : "black"

    property bool accelerating: false

    Keys.onSpacePressed: accelerating = true
    Keys.onReleased: {
        if (event.key === Qt.Key_Space) {
            accelerating = false;
            event.accepted = true;
        }
    }

    Button {
        id: accelerate
        text: "Accelerate"
        anchors.horizontalCenter: parent.horizontalCenter
        anchors.bottom: parent.bottom
        height: root.height * 0.125

        onPressedChanged: accelerating = pressed

        style: BlackButtonStyle {
            background: BlackButtonBackground {
                pressed: control.pressed
            }
            label: Text {
                text: control.text
                color: "white"
                font.pixelSize: Math.max(textSingleton.font.pixelSize, root.toPixels(0.04))
                font.family: openSans.name
                horizontalAlignment: Text.AlignHCenter
                verticalAlignment: Text.AlignVCenter
            }
        }
    }

    control: CircularGauge {
        id: gauge
        minimumValue: customizerItem.minimumValue
        maximumValue: customizerItem.maximumValue
        width: controlBounds.width
        height: controlBounds.height

        value: accelerating ? maximumValue : 0
        style: styleMap[customizerItem.currentStylePath]

        // This stops the styles being recreated when a new one is chosen.
        property var styleMap: {
            var styles = {};
            for (var i = 0; i < customizerItem.allStylePaths.length; ++i) {
                var path = customizerItem.allStylePaths[i];
                styles[path] = Qt.createComponent(path, gauge);
            }
            styles;
        }

        // Called to update the style after the user has edited a property.
        Connections {
            target: customizerItem
            onMinimumValueAngleChanged: __style.minimumValueAngle = customizerItem.minimumValueAngle
            onMaximumValueAngleChanged: __style.maximumValueAngle = customizerItem.maximumValueAngle
            onLabelStepSizeChanged: __style.tickmarkStepSize = __style.labelStepSize = customizerItem.labelStepSize
        }

        Behavior on value {
            NumberAnimation {
                easing.type: Easing.OutCubic
                duration: 6000
            }
        }
    }

    customizer: Column {
        readonly property var allStylePaths: {
            var paths = [];
            for (var i = 0; i < stylePicker.model.count; ++i) {
                paths.push(stylePicker.model.get(i).path);
            }
            paths;
        }
        property alias currentStylePath: stylePicker.currentStylePath
        property alias currentStyleDark: stylePicker.currentStyleDark
        property alias minimumValue: minimumValueSlider.value
        property alias maximumValue: maximumValueSlider.value
        property alias minimumValueAngle: minimumAngleSlider.value
        property alias maximumValueAngle: maximumAngleSlider.value
        property alias labelStepSize: labelStepSizeSlider.value

        id: circularGaugeColumn
        spacing: customizerPropertySpacing

        readonly property bool isDefaultStyle: stylePicker.model.get(stylePicker.currentIndex).name === "Default"

        Item {
            id: stylePickerBottomSpacing
            width: parent.width
            height: stylePicker.height + textSingleton.implicitHeight

            StylePicker {
                id: stylePicker
                currentIndex: 1

                model: ListModel {
                    ListElement {
                        name: "Default"
                        path: "CircularGaugeDefaultStyle.qml"
                        dark: true
                    }
                    ListElement {
                        name: "Dark"
                        path: "CircularGaugeDarkStyle.qml"
                        dark: true
                    }
                    ListElement {
                        name: "Light"
                        path: "CircularGaugeLightStyle.qml"
                        dark: false
                    }
                }
            }
        }

        CustomizerLabel {
            text: "Minimum angle"
        }

        CustomizerSlider {
            id: minimumAngleSlider
            minimumValue: -180
            value: -145
            maximumValue: 180
            width: parent.width
        }

        CustomizerLabel {
            text: "Maximum angle"
        }

        CustomizerSlider {
            id: maximumAngleSlider
            minimumValue: -180
            value: 145
            maximumValue: 180
        }

        CustomizerLabel {
            text: "Minimum value"
        }

        CustomizerSlider {
            id: minimumValueSlider
            minimumValue: 0
            value: 0
            maximumValue: 360
            stepSize: 1
        }

        CustomizerLabel {
            text: "Maximum value"
        }

        CustomizerSlider {
            id: maximumValueSlider
            minimumValue: 0
            value: 240
            maximumValue: 300
            stepSize: 1
        }

        CustomizerLabel {
            text: "Label step size"
        }

        CustomizerSlider {
            id: labelStepSizeSlider
            minimumValue: 10
            value: 20
            maximumValue: 100
            stepSize: 20
        }
    }
}

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.