- Qt 5.5
- Qt Quick
- Qt Quick Demo - Calqlatr
- calqlatr.qml Example File
- Qt 5.5.1 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.
    **   * Neither the name of The Qt Company Ltd nor the names of its
    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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    ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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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 {
                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, mouse.x).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, mouse.x).x
                onReleased: {
                    if (rewind)
                        controller.completeToBeginning()
                    else
                        controller.completeToEnd()
                }
            }
        }

    }