Animated progress bar in QML - qt

Question

I need to create a Progress bar as below using QML Controls 2 :
ProgressBar{
id:progressBar
width : parent.width * 0.80
height:parent.height * 0.05
anchors.bottom:parent.bottom
anchors.bottomMargin: (parent.height * 0.03)
anchors.left:parent.left
anchors.leftMargin: (parent.width * 0.05)
value : 0.5
background: Rectangle {
color: "#e6e6e6"
radius: 3
}
contentItem: Item {
Rectangle {
width: progressBar.visualPosition * parent.width
height: parent.height
radius: 2
color: "#17a81a"
gradient: Gradient {
GradientStop {
position: 0.0
SequentialAnimation on color {
loops: Animation.Infinite
ColorAnimation { from: "#14148c"; to: "#0E1533"; duration: 5000 }
ColorAnimation { from: "#0E1533"; to: "#14148c"; duration: 5000 }
}
}
GradientStop {
position: 1.0
SequentialAnimation on color {
loops: Animation.Infinite
ColorAnimation { from: "#14aaff"; to: "#437284"; duration: 5000 }
ColorAnimation { from: "#437284"; to: "#14aaff"; duration: 5000 }
}
}
}
}
}
}
I have never used animations in QML and I tried with sequential animation as above which animates top to bottom. But i need it to animate left to right.
Can anyone help me to achieve this?

Answer 1

As for me I guess its bad idea to overwrite system behavior of controls.
Anyway, you can play with animated gradient. For example:
ProgressBar {
id: control
anchors.centerIn: parent
value: 0
height: 20
clip: true
background: Rectangle {
implicitWidth: 200
implicitHeight: 6
border.color: "#999999"
radius: 5
}
contentItem: Item {
implicitWidth: 200
implicitHeight: 4
Rectangle {
id: bar
width: control.visualPosition * parent.width
height: parent.height
radius: 5
}
LinearGradient {
anchors.fill: bar
start: Qt.point(0, 0)
end: Qt.point(bar.width, 0)
source: bar
gradient: Gradient {
GradientStop { position: 0.0; color: "#17a81a" }
GradientStop { id: grad; position: 0.5; color: Qt.lighter("#17a81a", 2) }
GradientStop { position: 1.0; color: "#17a81a" }
}
PropertyAnimation {
target: grad
property: "position"
from: 0.1
to: 0.9
duration: 1000
running: true
loops: Animation.Infinite
}
}
LinearGradient {
anchors.fill: bar
start: Qt.point(0, 0)
end: Qt.point(0, bar.height)
source: bar
gradient: Gradient {
GradientStop { position: 0.0; color: Qt.rgba(0,0,0,0) }
GradientStop { position: 0.5; color: Qt.rgba(1,1,1,0.3) }
GradientStop { position: 1.0; color: Qt.rgba(0,0,0,0.05) }
}
}
}
PropertyAnimation {
target: control
property: "value"
from: 0
to: 1
duration: 5000
running: true
loops: Animation.Infinite
}
}