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/******************************************************************************
Copyright (C) 2013-2016 Wang Bin <wbsecg1@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
import QtQuick 2.0
import "utils.js" as Utils
Rectangle {
id: root
color: "#44eeeeee"
radius: Utils.scaled(5)
property alias value: grip.value
property color lineColor: "#880000ee"
property color gripColor: "white"
property real gripSize: Utils.scaled(8)
property real gripTolerance: Utils.scaled(3.0)
property real increment: 0.1
property bool showGrip: true
property bool tracking: true
signal valueChangedByUi
signal hoverAt(real value)
// dx, dy: only the direction. dx>0 means enter from left or leave to left
signal enter(point pos, point dpos)
signal leave(point pos, point dpos)
Rectangle {
anchors {
left: parent.left
verticalCenter: parent.verticalCenter
}
radius: parent.radius
width: grip.x + grip.radius
height: parent.height
color: displayedColor(root.lineColor)
}
MouseArea {
anchors.fill: parent
hoverEnabled: true
onClicked: {
if (parent.width) {
parent.value = mouse.x / parent.width
valueChangedByUi(parent.value)
}
}
onMouseXChanged: {
hoverAt(mouseX/parent.width)
}
onEntered: {
enter(Qt.point(mouseX, mouseY), Qt.point(0, mouseY > height/2 ? 1 : -1))
hoverAt(mouseX/parent.width)
}
onExited: {
leave(Qt.point(mouseX, mouseY), Qt.point(0, mouseY > height/2 ? 1 : -1))
}
}
Rectangle {
id: grip
property real value: 0
x: (value * parent.width - width/2)
anchors.verticalCenter: parent.verticalCenter
width: root.gripTolerance * root.gripSize
height: parent.height
radius: width/2
color: "transparent"
MouseArea {
id: mouseArea
enabled: root.enabled
anchors.fill: parent
drag {
target: grip
axis: Drag.XAxis
minimumX: -parent.width/2
maximumX: root.width - parent.width/2
}
onPositionChanged: {
if (drag.active)
updatePosition()
}
onReleased: {
updatePosition()
}
function updatePosition()
{
value = (grip.x + grip.width/2) / grip.parent.width
valueChangedByUi(value)
}
}
Rectangle {
anchors.centerIn: parent
width: root.gripSize
height: parent.height
radius: width/2
color: root.showGrip ? root.gripColor : "transparent"
}
}
function displayedColor(c)
{
var tint = Qt.rgba(c.r, c.g, c.b, 0.25)
return enabled ? c : Qt.tint(c, tint)
}
}
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