- Qt 5.5
- Qt Quick
- Qt Quick Examples - Animation
- transitions.qml Example File
- Qt 5.5.1 Reference Documentation

# transitions.qml Example File

animation/states/transitions.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:
    **
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    ** modification, are permitted provided that the following conditions are
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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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    import QtQuick 2.0

    /*
        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  }
            }
        ]

        // ![0]
        // 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 }
            }
        // ![0]
        ]
    }