Qt 4.8: ImageDetails.qml Example File (demos/declarative/flickr/qml/flickr/mobile/ImageDetails.qml)

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# ImageDetails.qml Example File

demos/declarative/flickr/qml/flickr/mobile/ImageDetails.qml

     /****************************************************************************
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     ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the QtDeclarative module of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
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     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
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     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
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     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
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     import QtQuick 1.0
     import "../common" as Common

     Flipable {
         id: container

         property alias frontContainer: containerFront
         property string photoTitle: ""
         property string photoTags: ""
         property int photoWidth
         property int photoHeight
         property string photoType
         property string photoAuthor
         property string photoDate
         property string photoUrl
         property int rating: 2
         property variant prevScale: 1.0

         signal closed

         transform: Rotation {
             id: itemRotation
             origin.x: container.width / 2;
             axis.y: 1; axis.z: 0
         }

         front: Item {
             id: containerFront; anchors.fill: container

             Rectangle {
                 anchors.fill: parent
                 color: "black"; opacity: 0.4
             }

             Column {
                 spacing: 10
                 anchors {
                     left: parent.left; leftMargin: 10
                     right: parent.right; rightMargin: 10
                     top: parent.top; topMargin: 120
                 }
                 Text { font.bold: true; color: "white"; elide: Text.ElideRight; text: container.photoTitle; width: parent.width }
                 Text { color: "white"; elide: Text.ElideRight; text: "Size: " + container.photoWidth + 'x' + container.photoHeight; width: parent.width }
                 Text { color: "white"; elide: Text.ElideRight; text: "Type: " + container.photoType; width: parent.width }
                 Text { color: "white"; elide: Text.ElideRight; text: "Author: " + container.photoAuthor; width: parent.width }
                 Text { color: "white"; elide: Text.ElideRight; text: "Published: " + container.photoDate; width: parent.width }
                 Text { color: "white"; elide: Text.ElideRight; text: container.photoTags == "" ? "" : "Tags: "; width: parent.width }
                 Text { color: "white"; elide: Text.ElideRight; text: container.photoTags; width: parent.width }
             }
         }

         back: Item {
             anchors.fill: container

             Rectangle { anchors.fill: parent; color: "black"; opacity: 0.4 }

             Common.Progress {
                 anchors.centerIn: parent; width: 200; height: 22
                 progress: bigImage.progress; visible: bigImage.status != Image.Ready
             }

             Flickable {
                 id: flickable; anchors.fill: parent; clip: true
                 contentWidth: imageContainer.width; contentHeight: imageContainer.height

                 function updateMinimumScale() {
                     if (bigImage.status == Image.Ready && bigImage.width != 0) {
                         slider.minimum = Math.min(flickable.width / bigImage.width, flickable.height / bigImage.height);
                         if (bigImage.width * slider.value > flickable.width) {
                             var xoff = (flickable.width/2 + flickable.contentX) * slider.value / prevScale;
                             flickable.contentX = xoff - flickable.width/2;
                         }
                         if (bigImage.height * slider.value > flickable.height) {
                             var yoff = (flickable.height/2 + flickable.contentY) * slider.value / prevScale;
                             flickable.contentY = yoff - flickable.height/2;
                         }
                         prevScale = slider.value;
                     }
                 }

                 onWidthChanged: updateMinimumScale()
                 onHeightChanged: updateMinimumScale()

                 Item {
                     id: imageContainer
                     width: Math.max(bigImage.width * bigImage.scale, flickable.width);
                     height: Math.max(bigImage.height * bigImage.scale, flickable.height);

                     Image {
                         id: bigImage; source: container.photoUrl; scale: slider.value
                         anchors.centerIn: parent; smooth: !flickable.movingVertically
                         onStatusChanged : {
                             // Default scale shows the entire image.
                             if (bigImage.status == Image.Ready && bigImage.width != 0) {
                                 slider.minimum = Math.min(flickable.width / bigImage.width, flickable.height / bigImage.height);
                                 prevScale = Math.min(slider.minimum, 1);
                                 slider.value = prevScale;
                             }
                         }
                     }
                 }
             }

             Text {
                 text: "Image Unavailable"
                 visible: bigImage.status == Image.Error
                 anchors.centerIn: parent; color: "white"; font.bold: true
             }

             Common.Slider {
                 id: slider; visible: { bigImage.status == Image.Ready && maximum > minimum }
                 anchors {
                     bottom: parent.bottom; bottomMargin: 65
                     left: parent.left; leftMargin: 25
                     right: parent.right; rightMargin: 25
                 }
                 onValueChanged: {
                     if (bigImage.width * value > flickable.width) {
                         var xoff = (flickable.width/2 + flickable.contentX) * value / prevScale;
                         flickable.contentX = xoff - flickable.width/2;
                     }
                     if (bigImage.height * value > flickable.height) {
                         var yoff = (flickable.height/2 + flickable.contentY) * value / prevScale;
                         flickable.contentY = yoff - flickable.height/2;
                     }
                     prevScale = value;
                 }
             }
         }

         states: State {
             name: "Back"
             PropertyChanges { target: itemRotation; angle: 180 }
             PropertyChanges { target: toolBar; button2Visible: false }
             PropertyChanges { target: toolBar; button1Label: "Back" }
         }

         transitions: Transition {
             SequentialAnimation {
                 PropertyAction { target: bigImage; property: "smooth"; value: false }
                 NumberAnimation { easing.type: Easing.InOutQuad; properties: "angle"; duration: 500 }
                 PropertyAction { target: bigImage; property: "smooth"; value: !flickable.movingVertically }
             }
         }
     }