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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Graphical Effects module.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.12
Item {
id: slider
width: parent.width
height: 30
property real midPointValue: 0.5
property real blackPointValue: 0.0
property real whitePointValue: 1.0
property real maximum: 1
property real minimum: 0
property real gamma: Math.min(10.0, Math.max(0.1, 1/(Math.log(0.5) / Math.log(midPointValue))))
property string caption: ""
property bool integer: false
property bool showMidPoint: true
Text {
id: captionText
width: 110
anchors.bottom: parent.bottom
anchors.bottomMargin: 13
horizontalAlignment: Text.AlignRight
text: slider.caption + ':'
font.family: "Arial"
font.pixelSize: 11
color: "#B3B3B3"
}
Item {
id: track
height: parent.height
anchors.verticalCenter: parent.verticalCenter
anchors.left: parent.left
anchors.leftMargin: parent.width / 2 - 30
anchors.right: parent.right
anchors.rightMargin: 10
BorderImage {
id: trackImage
source: "images/slider_track.png"
anchors.left: parent.left
anchors.right: parent.right
border.right: 2
width: parent.width
}
BorderImage {
id: trackFilled
anchors.left: blackpointHandle.x < whitePointHandle.x ? blackpointHandle.right : whitePointHandle.right
anchors.right: blackpointHandle.x < whitePointHandle.x ? whitePointHandle.left : blackpointHandle.left
anchors.margins: -10
source: "images/slider_track_filled.png"
border.left: 3
border.right: 3
}
Image {
id: blackpointHandle;
smooth: true
source: blackpointMouseArea.pressed ? "images/slider_handle_pressed.png" : "images/slider_handle_black.png"
x: trackImage.x - width/2 + 5
width: 20
onXChanged: {
blackPointValue = minimum + maximum * ((x + 5) / (track.width - 10))
midpointHandle.x = blackpointHandle.x + ((whitePointHandle.x - blackpointHandle.x) * midPointValue)
}
}
Image {
id: midpointHandle;
smooth: true
source: midpointMouseArea.pressed ? "images/slider_handle_pressed.png" : "images/slider_handle_gray.png"
x: blackpointHandle.x + ((whitePointHandle.x - blackpointHandle.x) * 0.5)
visible: showMidPoint
width: 20
onXChanged: {
if (midpointMouseArea.pressed) {
midPointValue = (x - Math.min(whitePointHandle.x, blackpointHandle.x)) / Math.abs(whitePointHandle.x - blackpointHandle.x)
}
}
}
Image {
id: whitePointHandle;
smooth: true
source: whitepointMouseArea.pressed ? "images/slider_handle_pressed.png" : "images/slider_handle_white.png"
x: trackImage.x + trackImage.width - width/2 - 5
width: 20
onXChanged: {
whitePointValue = minimum + maximum * ((x + 5) / (track.width - 10))
midpointHandle.x = blackpointHandle.x + ((whitePointHandle.x - blackpointHandle.x) * midPointValue)
}
}
MouseArea {
id: blackpointMouseArea
anchors.fill: blackpointHandle
anchors.margins: -5
drag.target: blackpointHandle
drag.axis: Drag.XAxis
drag.minimumX: -5
drag.maximumX: trackImage.width - blackpointHandle.width + 5
}
MouseArea {
id: whitepointMouseArea
anchors.fill: whitePointHandle
anchors.margins: -5
drag.target: whitePointHandle
drag.axis: Drag.XAxis
drag.minimumX: -5
drag.maximumX: trackImage.width - whitePointHandle.width + 5
}
MouseArea {
id: midpointMouseArea
anchors.fill: midpointHandle
anchors.margins: -5
drag.target: midpointHandle
drag.axis: Drag.XAxis
drag.minimumX: Math.min(blackpointHandle.x, whitePointHandle.x)
drag.maximumX: Math.max(whitePointHandle.x, blackpointHandle.x)
}
}
Text {
id: blackPointValueCaption
anchors.bottom: track.bottom
anchors.left: track.left
text: slider.blackPointValue.toFixed(1)
font.family: "Arial"
font.pixelSize: 11
color: "#999999"
}
Text {
id: midPointValueCaption
anchors.bottom: track.bottom
anchors.left: track.left
anchors.right: track.right
horizontalAlignment: Text.AlignHCenter
width: track.width
text: slider.gamma.toFixed(1)
font.family: "Arial"
font.pixelSize: 11
color: "#999999"
visible: showMidPoint
}
Text {
id: whitePointValueCaption
anchors.bottom: track.bottom
anchors.right: track.right
text: slider.whitePointValue.toFixed(1)
font.family: "Arial"
font.pixelSize: 11
color: "#999999"
}
}
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