QGCSlider.qml 4.87 KB
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/****************************************************************************
**
** 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
** 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 Digia Plc and its Subsidiary(-ies) 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,
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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****************************************************************************/

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import QtQuick 2.1
import QGroundControl.Controls 1.0
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import QGroundControl.ScreenTools 1.0
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Item {
    id: slider;
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    height: 12
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    property real value // value is read/write.
    property real minimum: 0
    property real maximum: 1
    property int length: width - handle.width

    Rectangle {
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        anchors.fill:   parent
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        radius:         ScreenTools.defaultFontPixelSize * (0.5)
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        color:          Qt.rgba(0,0,0,0.65);
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    }

    Rectangle {
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        anchors.left:       parent.left
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        anchors.leftMargin: ScreenTools.defaultFontPixelSize * (0.33)
        radius:             ScreenTools.defaultFontPixelSize * (0.33)
        height:             ScreenTools.defaultFontPixelSize * (0.33)
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        width:              handle.x - x
        color:              "#69bb17"
        anchors.verticalCenter: parent.verticalCenter
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    }

    Rectangle {
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        id:                 labelRect
        width:              label.width
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        height:             label.height + ScreenTools.defaultFontPixelSize * (0.33)
        radius:             ScreenTools.defaultFontPixelSize * (0.33)
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        smooth:             true
        color:              Qt.rgba(1,1,1,0.75);
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        border.width:       ScreenTools.defaultFontPixelSize * (0.083)
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        border.color:       Qt.rgba(0,0,0,0.45);
        anchors.bottom:     handle.top
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        anchors.bottomMargin: ScreenTools.defaultFontPixelSize * (0.33)
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        visible: mouseRegion.pressed
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        x: Math.max(Math.min(handle.x + (handle.width - width ) / 2, slider.width - width), 0)
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        QGCLabel{
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            id:     label
            color:  "black"
            text:   slider.value.toFixed(2)
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            width:  font.pixelSize * 3.5
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            anchors.horizontalCenter:   labelRect.horizontalCenter
            horizontalAlignment:        Text.AlignHCenter
            anchors.verticalCenter:     labelRect.verticalCenter
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        }
    }

    Rectangle {
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        id:         handle;
        smooth:     true
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        width:      ScreenTools.defaultFontPixelSize * (2.16);
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        y:          (slider.height - height) / 2;
        x:          (slider.value - slider.minimum) * slider.length / (slider.maximum - slider.minimum)
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        height:     width
        radius:     width / 2
        gradient:   normalGradient
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        border.width: 2
        border.color: "white"

        Gradient {
            id: normalGradient
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            GradientStop { position: 0.0;  color: "#b0b0b0" }
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            GradientStop { position: 0.66; color: "#909090" }
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            GradientStop { position: 1.0;  color: "#545454" }
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        }

        MouseArea {
            id: mouseRegion
            hoverEnabled: false
            anchors.fill: parent; drag.target: parent
            drag.axis: Drag.XAxis; drag.minimumX: 0; drag.maximumX: slider.length
            preventStealing: true
            onPositionChanged: { slider.value = (slider.maximum - slider.minimum) * handle.x / slider.length + slider.minimum; }
        }
    }
}