Qt 4.8: wigglytext.qml Example File (declarative/animation/behaviors/wigglytext/qml/wigglytext/wigglytext.qml)

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# wigglytext.qml Example File

declarative/animation/behaviors/wigglytext/qml/wigglytext/wigglytext.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
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     **   * Redistributions of source code must retain the above copyright
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     **     from this software without specific prior written permission.
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     import QtQuick 1.0

     Rectangle {
         id: container

         property string text: "Drag this text..."
         property bool animated: true

         width: 640; height: 480; color: "#474747"; focus: true

         Keys.onPressed: {
             if (event.key == Qt.Key_Delete || event.key == Qt.Key_Backspace)
                 container.remove()
             else if (event.text != "") {
                 container.append(event.text)
             }
         }

         function append(text) {
             container.animated = false
             var lastLetter = container.children[container.children.length - 1]
             var newLetter = letterComponent.createObject(container)
             newLetter.text = text
             newLetter.follow = lastLetter
             container.animated = true
         }

         function remove() {
             if (container.children.length)
                 container.children[container.children.length - 1].destroy()
         }

         function doLayout() {
             var follow = null
             for (var i = 0; i < container.text.length; ++i) {
                 var newLetter = letterComponent.createObject(container)
                 newLetter.text = container.text[i]
                 newLetter.follow = follow
                 follow = newLetter
             }
         }

         Component {
             id: letterComponent
             Text {
                 id: letter
                 property variant follow

                 x: follow ? follow.x + follow.width : container.width / 3
                 y: follow ? follow.y : container.height / 2

                 font.pixelSize: 40; font.bold: true
                 color: "#999999"; styleColor: "#222222"; style: Text.Raised

                 MouseArea {
                     anchors.fill: parent
                     drag.target: letter; drag.axis: Drag.XandYAxis
                     onPressed: letter.color = "#dddddd"
                     onReleased: letter.color = "#999999"
                 }

                 Behavior on x { enabled: container.animated; SpringAnimation { spring: 3; damping: 0.3; mass: 1.0 } }
                 Behavior on y { enabled: container.animated; SpringAnimation { spring: 3; damping: 0.3; mass: 1.0 } }
             }
         }

         Component.onCompleted: doLayout()
     }