PlanetButton.qml Example File

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import QtQuick 2.0

Rectangle {

    id: planetButton
    property alias text: planetText.text
    property alias source: planetImage.source
    property alias focusPlanet: planetImage.focusPlanet
    property Item planetSelector: parent.parent
    property int buttonSize: 70
    property int fontSize: 16

    width: buttonSize; height: buttonSize
    color: "transparent"

    Image {
        id: planetImage
        anchors.fill: parent
        property int focusPlanet

        MouseArea {
            anchors.fill: parent
            hoverEnabled: true
            onClicked: { planetSelector.focusedPlanet = focusPlanet; }
        }
    }

    Text {
        id: planetText
        anchors.centerIn: parent
        font.family: "Helvetica"
        font.pixelSize: fontSize
        font.weight: Font.Light
        color: "white"
    }

}