Qt 4.8: transitions.qml Example File (declarative/animation/states/qml/states/transitions.qml)

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# transitions.qml Example File

declarative/animation/states/qml/states/transitions.qml

     /****************************************************************************
     **
     ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** 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:
     **
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     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     import QtQuick 1.0

     /*
         This is exactly the same as states.qml, except that we have appended
         a set of transitions to apply animations when the item changes
         between each state.
     */

     Rectangle {
         id: page
         width: 640; height: 480
         color: "#343434"

         Image {
             id: userIcon
             x: topLeftRect.x; y: topLeftRect.y
             source: "qt-logo.png"
         }

         Rectangle {
             id: topLeftRect

             anchors { left: parent.left; top: parent.top; leftMargin: 10; topMargin: 20 }
             width: 46; height: 54
             color: "Transparent"; border.color: "Gray"; radius: 6

             // Clicking in here sets the state to the default state, returning the image to
             // its initial position
             MouseArea { anchors.fill: parent; onClicked: page.state = '' }
         }

         Rectangle {
             id: middleRightRect

             anchors { right: parent.right; verticalCenter: parent.verticalCenter; rightMargin: 20 }
             width: 46; height: 54
             color: "Transparent"; border.color: "Gray"; radius: 6

             // Clicking in here sets the state to 'middleRight'
             MouseArea { anchors.fill: parent; onClicked: page.state = 'middleRight' }
         }

         Rectangle {
             id: bottomLeftRect

             anchors { left: parent.left; bottom: parent.bottom; leftMargin: 10; bottomMargin: 20 }
             width: 46; height: 54
             color: "Transparent"; border.color: "Gray"; radius: 6

             // Clicking in here sets the state to 'bottomLeft'
             MouseArea { anchors.fill: parent; onClicked: page.state = 'bottomLeft' }
         }

         states: [
             // In state 'middleRight', move the image to middleRightRect
             State {
                 name: "middleRight"
                 PropertyChanges { target: userIcon; x: middleRightRect.x; y: middleRightRect.y }
             },

             // In state 'bottomLeft', move the image to bottomLeftRect
             State {
                 name: "bottomLeft"
                 PropertyChanges { target: userIcon; x: bottomLeftRect.x; y: bottomLeftRect.y  }
             }
         ]

         // Transitions define how the properties change when the item moves between each state
         transitions: [

             // When transitioning to 'middleRight' move x,y over a duration of 1 second,
             // with OutBounce easing function.
             Transition {
                 from: "*"; to: "middleRight"
                 NumberAnimation { properties: "x,y"; easing.type: Easing.OutBounce; duration: 1000 }
             },

             // When transitioning to 'bottomLeft' move x,y over a duration of 2 seconds,
             // with InOutQuad easing function.
             Transition {
                 from: "*"; to: "bottomLeft"
                 NumberAnimation { properties: "x,y"; easing.type: Easing.InOutQuad; duration: 2000 }
             },

             // For any other state changes move x,y linearly over duration of 200ms.
             Transition {
                 NumberAnimation { properties: "x,y"; duration: 200 }
             }
         ]
     }