/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Components/1.3/CrossFadeImage.qml is in qml-module-ubuntu-components 1.3.1918+16.04.20160404-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | /*
* Copyright (C) 2014 Canonical, Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import QtQuick 2.4
// FIXME: When a module contains QML, C++ and JavaScript elements exported,
// we need to use named imports otherwise namespace collision is reported
// by the QML engine. As workaround, we use Ubuntu named import.
// Bug to watch: https://bugreports.qt-project.org/browse/QTBUG-27645
import Ubuntu.Components 1.3 as Ubuntu
/*!
\internal
Documentation is in CrossFadeImage.qdoc
*/
Item {
id: crossFadeImage
property url source
property int fillMode : Image.PreserveAspectFit
property int fadeDuration: Ubuntu.UbuntuAnimation.FastDuration
// FIXME: Support resetting sourceSize
property size sourceSize: internals.loadingImage ? Qt.size(internals.loadingImage.sourceSize.width, internals.loadingImage.sourceSize.height) : Qt.size(0, 0)
property string fadeStyle: "overlay"
readonly property bool running: nextImageFadeIn.running
readonly property int status: internals.loadingImage ? internals.loadingImage.status : Image.Null
Binding {
target: crossFadeImage
property: "sourceSize"
value: internals.loadingImage ? Qt.size(internals.loadingImage.sourceSize.width, internals.loadingImage.sourceSize.height) : Qt.size(0, 0)
when: internals.forcedSourceSize === undefined
}
/*!
\internal
*/
onSourceSizeChanged: {
if (internals.loadingImage && (sourceSize != Qt.size(internals.loadingImage.sourceSize.width, internals.loadingImage.sourceSize.height))) {
internals.forcedSourceSize = sourceSize;
}
}
QtObject {
id: internals
/*! \internal
Source size specified by the setting crossFadeImage.sourceSize.
*/
property size forcedSourceSize
/*! \internal
Defines the image currently being shown
*/
property Image currentImage: image1
/*! \internal
Defines the image being changed to
*/
property Image nextImage: image2
property Image loadingImage: currentImage
function swapImages() {
internals.currentImage.z = 0;
internals.nextImage.z = 1;
nextImageFadeIn.start();
var tmpImage = internals.currentImage;
internals.currentImage = internals.nextImage;
internals.nextImage = tmpImage;
}
}
QtObject {
// dummy object used to disable crossfade animation
id: fadeOutDummy
property real opacity
}
Image {
id: image1
anchors.fill: parent
cache: false
asynchronous: true
fillMode: parent.fillMode
z: 1
Binding {
target: image1
property: "sourceSize"
value: internals.forcedSourceSize
when: internals.forcedSourceSize !== undefined
}
}
Image {
id: image2
anchors.fill: parent
cache: false
asynchronous: true
fillMode: parent.fillMode
z: 0
Binding {
target: image2
property: "sourceSize"
value: internals.forcedSourceSize
when: internals.forcedSourceSize !== undefined
}
}
/*!
\internal
Do the fading when the source is updated
*/
onSourceChanged: {
// On creation, the souce handler is called before image pointers are set.
if (internals.currentImage === null) {
internals.currentImage = image1;
internals.nextImage = image2;
}
nextImageFadeIn.stop();
// Don't fade in initial picture, only fade changes
if (internals.currentImage.source == "") {
internals.currentImage.source = source;
internals.loadingImage = internals.currentImage;
} else {
nextImageFadeIn.stop();
internals.nextImage.opacity = 0.0;
internals.nextImage.source = source;
internals.loadingImage = internals.nextImage;
// If case the image is still in QML's cache, status will be "Ready" immediately
if (internals.nextImage.status === Image.Ready || internals.nextImage.source === "") {
internals.swapImages();
}
}
}
Connections {
target: internals.nextImage
onStatusChanged: {
if (internals.nextImage.status == Image.Ready) {
internals.swapImages();
}
}
}
ParallelAnimation {
id: nextImageFadeIn
Ubuntu.UbuntuNumberAnimation {
id: currentImageFadeOut
target: fadeStyle == "cross" ? internals.currentImage : fadeOutDummy
property: "opacity"
to: 0.0
duration: crossFadeImage.fadeDuration
}
Ubuntu.UbuntuNumberAnimation {
target: internals.nextImage
property: "opacity"
to: 1.0
duration: crossFadeImage.fadeDuration
}
onRunningChanged: {
if (!running) {
internals.nextImage.source = "";
}
}
}
}
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