Qt Quick Batching
import QtQuick 2.0
Item {
id: root
property bool mirrorSlider: false
property real minValue: 0
property real maxValue: 100
property real value: 50
ListView {
id: view
anchors.fill: parent
anchors.rightMargin: mirrorSlider ? 0 : handle.width
anchors.leftMargin: mirrorSlider ? handle.width : 0
orientation: Qt.Vertical
interactive: false
property int itemHeight: 7
model: height/itemHeight
currentIndex: (root.value - root.minValue) / (root.maxValue - root.minValue) * view.count
delegate: Item {
width: view.width
height: view.itemHeight
property int entry: index
Rectangle {
property bool active: view.currentIndex <= index
anchors.right: parent.right
width: parent.width
height: parent.height - 3
color: Qt.hsva((index/view.count)/3, active ? 1.0 : 0.5, active ? 1.0 : 0.75)
opacity: active ? 1.0 : 1.0 - (view.currentIndex - index) / view.model
scale: active ? 1.0 : 0.9
}
}
Rectangle {
id: handle
property real currentItemY: view.currentItem ? view.currentItem.y : 0
anchors.left: mirrorSlider ? undefined : parent.right
anchors.right: mirrorSlider ? parent.left : undefined
width: 10
height: width
radius: 5
color: "darkgray"
y: currentItemY - height / 2 + 3
}
MouseArea {
id: dragArea
anchors.fill: view
hoverEnabled: false
preventStealing: true
onClicked: updateCurrentIndex(mouse.x, mouse.y)
onPositionChanged: updateCurrentIndex(mouse.x, mouse.y)
function updateCurrentIndex(x, y) {
var item = view.itemAt(x, y);
if (item) {
var newValue = item.entry / view.count * (root.maxValue - root.minValue) + root.minValue;
root.value = Math.min(root.maxValue, Math.max(root.minValue, newValue));
}
}
}
}
}