Qt Quick Demo - Calqlatr

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import QtQuick 2.0 Item { id: button property alias text: textItem.text property color color: "#eceeea" property bool operator: false property bool dimmable: false property bool dimmed: false width: 30 height: 50 Text { id: textItem font.pixelSize: 48 wrapMode: Text.WordWrap lineHeight: 0.75 color: (dimmable && dimmed) ? Qt.darker(button.color) : button.color Behavior on color { ColorAnimation { duration: 120; easing.type: Easing.OutElastic} } states: [ State { name: "pressed" when: mouse.pressed && !dimmed PropertyChanges { target: textItem color: Qt.lighter(button.color) } } ] } MouseArea { id: mouse anchors.fill: parent anchors.margins: -5 onClicked: { if (operator) window.operatorPressed(parent.text) else window.digitPressed(parent.text) } } function updateDimmed() { dimmed = window.isButtonDisabled(button.text) } Component.onCompleted: { numPad.buttonPressed.connect(updateDimmed) updateDimmed() } }