calculator-qml.qml Example File | Qt SCXML 5.9

Qt 5.9 | Qt SCXML | Qt SCXML Calculator QML Example | calculator-qml.qml Example File

Qt 5.9.3 Reference Documentation

# calculator-qml.qml Example File

calculator-qml/calculator-qml.qml

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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")
              }
          }
      }