harbour-fernschreiber/qml/components/ImagePreview.qml
John Gibbon fdb8cc5852 replace variant with var
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).
2020-11-05 23:23:37 +01:00

91 lines
3 KiB
QML

/*
Copyright (C) 2020 Sebastian J. Wolf and other contributors
This file is part of Fernschreiber.
Fernschreiber 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, either version 3 of the License, or
(at your option) any later version.
Fernschreiber 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 Fernschreiber. If not, see <http://www.gnu.org/licenses/>.
*/
import QtQuick 2.6
import Sailfish.Silica 1.0
Item {
id: imagePreviewItem
property ListItem messageListItem
property var rawMessage: messageListItem.myMessage
property var photoData: rawMessage.content.photo;
property var pictureFileInformation;
width: parent.width
height: width * 2 / 3
Component.onCompleted: {
updatePicture();
}
function updatePicture() {
if (photoData) {
// Check first which size fits best...
for (var i = 0; i < photoData.sizes.length; i++) {
imagePreviewItem.pictureFileInformation = photoData.sizes[i].photo;
if (photoData.sizes[i].width >= imagePreviewItem.width) {
break;
}
}
if (imagePreviewItem.pictureFileInformation.local.is_downloading_completed) {
singleImage.source = imagePreviewItem.pictureFileInformation.local.path;
} else {
tdLibWrapper.downloadFile(imagePreviewItem.pictureFileInformation.id);
}
}
}
Connections {
target: tdLibWrapper
onFileUpdated: {
if (imagePreviewItem.pictureFileInformation) {
if (fileId === imagePreviewItem.pictureFileInformation.id && fileInformation.local.is_downloading_completed) {
imagePreviewItem.pictureFileInformation = fileInformation;
singleImage.source = fileInformation.local.path;
}
}
}
}
Image {
id: singleImage
width: parent.width - Theme.paddingSmall
height: parent.height - Theme.paddingSmall
anchors.centerIn: parent
fillMode: Image.PreserveAspectCrop
autoTransform: true
asynchronous: true
visible: status === Image.Ready
opacity: status === Image.Ready ? 1 : 0
Behavior on opacity { NumberAnimation {} }
MouseArea {
anchors.fill: parent
onClicked: {
pageStack.push(Qt.resolvedUrl("../pages/ImagePage.qml"), { "photoData" : imagePreviewItem.photoData, "pictureFileInformation" : imagePreviewItem.pictureFileInformation });
}
}
}
BackgroundImage {
visible: singleImage.status !== Image.Ready
}
}