Qt 4.8: screenorientation.qml Example File (declarative/screenorientation/screenorientation.qml)

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# screenorientation.qml Example File

declarative/screenorientation/screenorientation.qml

     /****************************************************************************
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     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
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     ** This file is part of the examples of the Qt Toolkit.
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     import QtQuick 1.0
     import "Core"
     import "Core/screenorientation.js" as ScreenOrientation

     Rectangle {
         id: window
         width: 360
         height: 640
         color: "white"

         Rectangle {
             id: main
             clip: true
             property variant selectedOrientation: Orientation.UnknownOrientation
             property variant activeOrientation: selectedOrientation == Orientation.UnknownOrientation ? runtime.orientation : selectedOrientation
             state: "orientation " + activeOrientation
             property bool inPortrait: (activeOrientation == Orientation.Portrait || activeOrientation == Orientation.PortraitInverted);

             // rotation correction for landscape devices like N900
             property bool landscapeWindow: window.width > window.height
             property variant rotationDelta: landscapeWindow ? -90 : 0
             rotation: rotationDelta

             // initial state is portrait
             property real baseWidth: landscapeWindow ? window.height-10 : window.width-10
             property real baseHeight: landscapeWindow ? window.width-10 : window.height-10

             width: baseWidth
             height: baseHeight
             anchors.centerIn: parent

             color: "black"
             gradient: Gradient {
                 GradientStop { position: 0.0; color: Qt.rgba(0.5,0.5,0.5,0.5) }
                 GradientStop { position: 0.8; color: "black" }
                 GradientStop { position: 1.0; color: "black" }
             }
             Item {
                 id: bubbles
                 property bool rising: false
                 anchors.fill: parent
                 property variant gravityPoint: ScreenOrientation.calculateGravityPoint(main.activeOrientation, runtime.orientation)
                 Repeater {
                     model: 24
                     Bubble {
                         rising: bubbles.rising
                         verticalRise: ScreenOrientation.parallel(main.activeOrientation, runtime.orientation)
                         xAttractor: parent.gravityPoint.x
                         yAttractor: parent.gravityPoint.y
                     }
                 }
                 Component.onCompleted: bubbles.rising = true;
             }

             Column {
                 width: centeredText.width
                 anchors.verticalCenter: parent.verticalCenter
                 anchors.horizontalCenter: parent.horizontalCenter
                 anchors.verticalCenterOffset: 30
                 Text {
                     text: "Orientation"
                     color: "white"
                     font.pixelSize: 22
                     anchors.horizontalCenter: parent.horizontalCenter
                 }
                 Text {
                     id: centeredText
                     text: ScreenOrientation.printOrientation(main.activeOrientation)
                     color: "white"
                     font.pixelSize: 40
                     anchors.horizontalCenter: parent.horizontalCenter
                 }
                 Text {
                     text: "sensor: " + ScreenOrientation.printOrientation(runtime.orientation)
                     color: "white"
                     font.pixelSize: 14
                     anchors.horizontalCenter: parent.horizontalCenter
                 }
             }
             Flow {
                 anchors.top: parent.top
                 anchors.left: parent.left
                 anchors.right: parent.right
                 anchors.margins: 10
                 spacing: 4
                 Button {
                     width: main.inPortrait ? (parent.width-4)/2 : (parent.width-8)/3
                     text: "Portrait"
                     onClicked: main.selectedOrientation = Orientation.Portrait
                     toggled: main.selectedOrientation == Orientation.Portrait
                 }
                 Button {
                     width: main.inPortrait ? (parent.width-4)/2 : (parent.width-8)/3
                     text: "Portrait inverted"
                     onClicked: main.selectedOrientation = Orientation.PortraitInverted
                     toggled: main.selectedOrientation == Orientation.PortraitInverted
                 }
                 Button {
                     width: main.inPortrait ? (parent.width-4)/2 : (parent.width-8)/3
                     text: "Landscape"
                     onClicked: main.selectedOrientation = Orientation.Landscape
                     toggled: main.selectedOrientation == Orientation.Landscape
                 }
                 Button {
                     width: main.inPortrait ? (parent.width-4)/2 : (parent.width-8)/3
                     text: "Landscape inverted"
                     onClicked: main.selectedOrientation = Orientation.LandscapeInverted
                     toggled: main.selectedOrientation == Orientation.LandscapeInverted
                 }
                 Button {
                     width: main.inPortrait ? parent.width : 2*(parent.width-2)/3
                     text: "From runtime.orientation"
                     onClicked: main.selectedOrientation = Orientation.UnknownOrientation
                     toggled: main.selectedOrientation == Orientation.UnknownOrientation
                 }
             }
             states: [
                 State {
                     name: "orientation " + Orientation.Landscape
                     PropertyChanges {
                         target: main
                         rotation: ScreenOrientation.getAngle(Orientation.Landscape)+rotationDelta
                         width: baseHeight
                         height: baseWidth
                     }
                 },
                 State {
                     name: "orientation " + Orientation.PortraitInverted
                     PropertyChanges {
                         target: main
                         rotation: ScreenOrientation.getAngle(Orientation.PortraitInverted)+rotationDelta
                         width: baseWidth
                         height: baseHeight
                     }
                 },
                 State {
                     name: "orientation " + Orientation.LandscapeInverted
                     PropertyChanges {
                         target: main
                         rotation: ScreenOrientation.getAngle(Orientation.LandscapeInverted)+rotationDelta
                         width: baseHeight
                         height: baseWidth
                     }
                 }
             ]
             transitions: Transition {
                 ParallelAnimation {
                     RotationAnimation {
                         direction: RotationAnimation.Shortest
                         duration: 300
                         easing.type: Easing.InOutQuint
                     }
                     NumberAnimation {
                         properties: "x,y,width,height"
                         duration: 300
                         easing.type: Easing.InOutQuint
                     }
                 }
             }
         }
     }