Qt 5.8 | Qt Quick | Qt Quick Demo - Calqlatr | calqlatr.qml Example File

Qt 5.8.0 Reference Documentation

# calqlatr.qml Example File

demos/calqlatr/calqlatr.qml

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** You may use this file under the terms of the BSD license as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
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      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
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      **
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      import QtQuick 2.0
      import "content"
      import "content/calculator.js" as CalcEngine

      Rectangle {
          id: window
          width: 320
          height: 480
          focus: true
          color: "#272822"

          onWidthChanged: controller.reload()
          onHeightChanged: controller.reload()

          function operatorPressed(operator) {
              CalcEngine.operatorPressed(operator)
              numPad.buttonPressed()
          }
          function digitPressed(digit) {
              CalcEngine.digitPressed(digit)
              numPad.buttonPressed()
          }
          function isButtonDisabled(op) {
              return CalcEngine.disabled(op)
          }

          Item {
              id: pad
              width: 180
              NumberPad { id: numPad; y: 10; anchors.horizontalCenter: parent.horizontalCenter }
          }

          AnimationController {
              id: controller
              animation: ParallelAnimation {
                  id: anim
                  NumberAnimation { target: display; property: "x"; duration: 400; from: -16; to: window.width - display.width; easing.type: Easing.InOutQuad }
                  NumberAnimation { target: pad; property: "x"; duration: 400; from: window.width - pad.width; to: 0; easing.type: Easing.InOutQuad }
                  SequentialAnimation {
                      NumberAnimation { target: pad; property: "scale"; duration: 200; from: 1; to: 0.97; easing.type: Easing.InOutQuad }
                      NumberAnimation { target: pad; property: "scale"; duration: 200; from: 0.97; to: 1; easing.type: Easing.InOutQuad }
                  }
              }
          }

          Keys.onPressed: {
              if (event.key == Qt.Key_0)
                  digitPressed("0")
              else if (event.key == Qt.Key_1)
                  digitPressed("1")
              else if (event.key == Qt.Key_2)
                  digitPressed("2")
              else if (event.key == Qt.Key_3)
                  digitPressed("3")
              else if (event.key == Qt.Key_4)
                  digitPressed("4")
              else if (event.key == Qt.Key_5)
                  digitPressed("5")
              else if (event.key == Qt.Key_6)
                  digitPressed("6")
              else if (event.key == Qt.Key_7)
                  digitPressed("7")
              else if (event.key == Qt.Key_8)
                  digitPressed("8")
              else if (event.key == Qt.Key_9)
                  digitPressed("9")
              else if (event.key == Qt.Key_Plus)
                  operatorPressed("+")
              else if (event.key == Qt.Key_Minus)
                  operatorPressed("−")
              else if (event.key == Qt.Key_Asterisk)
                  operatorPressed("×")
              else if (event.key == Qt.Key_Slash)
                  operatorPressed("÷")
              else if (event.key == Qt.Key_Enter || event.key == Qt.Key_Return)
                  operatorPressed("=")
              else if (event.key == Qt.Key_Comma || event.key == Qt.Key_Period)
                  digitPressed(".")
              else if (event.key == Qt.Key_Backspace)
                  operatorPressed("backspace")
          }

          Display {
              id: display
              x: -16
              width: window.width - pad.width
              height: parent.height

              MouseArea {
                  id: mouseInput
                  property real startX: 0
                  property real oldP: 0
                  property bool rewind: false

                  anchors {
                      bottom: parent.bottom
                      left: parent.left
                      right: parent.right
                  }
                  height: 50
                  onPositionChanged: {
                      var reverse = startX > window.width / 2
                      var mx = mapToItem(window, mouseInput.mouseX, mouseInput.mouseY).x
                      var p = Math.abs((mx - startX) / (window.width - display.width))
                      if (p < oldP)
                          rewind = reverse ? false : true
                      else
                          rewind = reverse ? true : false
                      controller.progress = reverse ? 1 - p : p
                      oldP = p
                  }
                  onPressed: startX = mapToItem(window, mouseInput.mouseX, mouseInput.mouseY).x
                  onReleased: {
                      if (rewind)
                          controller.completeToBeginning()
                      else
                          controller.completeToEnd()
                  }
              }
          }

      }