fdb8cc5852
https://doc.qt.io/archives/qt-5.6/qtquick-performance.html In general, "property var" should be considered to be superior to "property variant" for every use-case from QtQuick 2.0 and newer (note that "property variant" is marked as obsolete), as it allows a true JavaScript reference to be stored (which can reduce the number of conversions required in certain expressions).
91 lines
3 KiB
QML
91 lines
3 KiB
QML
/*
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Copyright (C) 2020 Sebastian J. Wolf and other contributors
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This file is part of Fernschreiber.
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Fernschreiber is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Fernschreiber is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fernschreiber. If not, see <http://www.gnu.org/licenses/>.
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*/
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import QtQuick 2.6
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import Sailfish.Silica 1.0
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Item {
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id: imagePreviewItem
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property ListItem messageListItem
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property var rawMessage: messageListItem.myMessage
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property var photoData: rawMessage.content.photo;
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property var pictureFileInformation;
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width: parent.width
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height: width * 2 / 3
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Component.onCompleted: {
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updatePicture();
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}
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function updatePicture() {
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if (photoData) {
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// Check first which size fits best...
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for (var i = 0; i < photoData.sizes.length; i++) {
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imagePreviewItem.pictureFileInformation = photoData.sizes[i].photo;
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if (photoData.sizes[i].width >= imagePreviewItem.width) {
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break;
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}
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}
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if (imagePreviewItem.pictureFileInformation.local.is_downloading_completed) {
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singleImage.source = imagePreviewItem.pictureFileInformation.local.path;
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} else {
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tdLibWrapper.downloadFile(imagePreviewItem.pictureFileInformation.id);
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}
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}
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}
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Connections {
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target: tdLibWrapper
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onFileUpdated: {
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if (imagePreviewItem.pictureFileInformation) {
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if (fileId === imagePreviewItem.pictureFileInformation.id && fileInformation.local.is_downloading_completed) {
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imagePreviewItem.pictureFileInformation = fileInformation;
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singleImage.source = fileInformation.local.path;
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}
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}
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}
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}
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Image {
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id: singleImage
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width: parent.width - Theme.paddingSmall
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height: parent.height - Theme.paddingSmall
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anchors.centerIn: parent
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fillMode: Image.PreserveAspectCrop
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autoTransform: true
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asynchronous: true
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visible: status === Image.Ready
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opacity: status === Image.Ready ? 1 : 0
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Behavior on opacity { NumberAnimation {} }
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MouseArea {
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anchors.fill: parent
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onClicked: {
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pageStack.push(Qt.resolvedUrl("../pages/ImagePage.qml"), { "photoData" : imagePreviewItem.photoData, "pictureFileInformation" : imagePreviewItem.pictureFileInformation });
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}
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}
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}
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BackgroundImage {
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visible: singleImage.status !== Image.Ready
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}
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}
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