calculator-qml.qml Example File

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 import CalculatorStateMachine 1.0
 import QtQuick 2.5
 import QtQuick.Window 2.0
 import QtScxml 5.8

 Window {
     id: window
     visible: true
     width: 320
     height: 480

     CalculatorStateMachine {
         id: statemachine
         running: true
         EventConnection {
             events: ["updateDisplay"]
             onOccurred: resultText.text = event.data.display
         }
     }

     Rectangle {
         id: resultArea
         anchors.left: parent.left
         anchors.right: parent.right
         anchors.top: parent.top
         height: parent.height * 3 / 8 - 10
         border.color: "white"
         border.width: 1
         color: "#46a2da"
         Text {
             id: resultText
             anchors.leftMargin: buttons.implicitMargin
             anchors.rightMargin: buttons.implicitMargin
             anchors.fill: parent
             horizontalAlignment: Text.AlignRight
             verticalAlignment: Text.AlignVCenter
             text: "0"
             color: "white"
             font.pixelSize: window.height * 3 / 32
             font.family: "Open Sans Regular"
             fontSizeMode: Text.Fit
         }
     }

     Item {
         id: buttons
         anchors.top: resultArea.bottom
         anchors.left: parent.left
         anchors.right: parent.right
         anchors.bottom: parent.bottom
         property real implicitMargin: {
             var ret = 0;
             for (var i = 0; i < visibleChildren.length; ++i) {
                 var child = visibleChildren[i];
                 ret += (child.implicitMargin || 0);
             }
             return ret / visibleChildren.length;
         }

         Repeater {
             id: operations
             model: ["÷", "×", "+", "-"]
             Button {
                 y: 0
                 x: index * width
                 width: parent.width / 4
                 height: parent.height / 5
                 color: pressed ? "#5caa15" : "#80c342"
                 text: modelData
                 fontHeight: 0.4
                 onClicked: statemachine.submitEvent(eventName)
                 property string eventName: {
                     switch (text) {
                     case "÷": return "OPER.DIV"
                     case "×": return "OPER.STAR"
                     case "+": return "OPER.PLUS"
                     case "-": return "OPER.MINUS"
                     }
                 }
             }
         }

         Repeater {
             id: digits
             model: ["7", "8", "9", "4", "5", "6", "1", "2", "3", "0", ".", "C"]
             Button {
                 x: (index % 3) * width
                 y: Math.floor(index / 3 + 1) * height
                 width: parent.width / 4
                 height: parent.height / 5
                 color: pressed ? "#d6d6d6" : "#eeeeee"
                 text: modelData
                 onClicked: statemachine.submitEvent(eventName)
                 property string eventName: {
                     switch (text) {
                     case ".": return "POINT"
                     case "C": return "C"
                     default: return "DIGIT." + text
                     }
                 }
             }
         }

         Button {
             id: resultButton
             x: 3 * width
             y: parent.height / 5
             textHeight: y - 2
             fontHeight: 0.4
             width: parent.width / 4
             height: y * 4
             color: pressed ? "#e0b91c" : "#face20"
             text: "="
             onClicked: statemachine.submitEvent("EQUALS")
         }
     }
 }