qml gradient 横向渐变

Rectangle {

    gradient: Gradient {
        GradientStop {
            color: "#333"
            position: 0
        }
        GradientStop {
            color: "#222"
            position: 1
        }
    }
}

    LinearGradient {
        anchors.fill: parent
        start: Qt.point(0, 0)
        end: Qt.point(300, 0)
        gradient: Gradient {
            GradientStop { position: 0.0; color: "white" }
            GradientStop { position: 1.0; color: "black" }
        }
    }