harbour-fernschreiber/qml/components/TDLibThumbnail.qml

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/*
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
import Nemo.Thumbnailer 1.0
Item {
id: tdlibThumbnail
/*
Optional thumbnail, usually as property "thumbnail".
The following TDLib objects can have it:
- animation
- audio (as "album_cover_thumbnail")
- document
- sticker (no minithumbnail)
- video
- videoNote
- stickerSet (no minithumbnail)
- stickerSetInfo (no minithumbnail)
- inlineQueryResultArticle (no minithumbnail)
- inlineQueryResultContact (no minithumbnail)
- inlineQueryResultLocation (no minithumbnail)
- inlineQueryResultVenue (no minithumbnail)
*/
property var thumbnail
/*
Optional minithumbnail, usually as property "minithumbnail".
Has data inline: If present, it doesn't need another request.
The following TDLib objects can have it:
- animation
- audio (as "album_cover_minithumbnail")
- document
- photo / chatPhoto (Note: No thumbnail, so not applicable here)
- video
- videoNote
*/
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property alias minithumbnail: minithumbnailLoader.minithumbnail
property bool useBackgroundImage: true
property bool highlighted
property bool isVideo: !!thumbnail && thumbnail.format["@type"] === "thumbnailFormatMpeg4"
property string videoMimeType: "video/mp4"
readonly property bool hasVisibleThumbnail: thumbnailImage.opacity !== 1.0
&& !(videoThumbnailLoader.item && videoThumbnailLoader.item.opacity === 1.0)
layer {
enabled: highlighted
effect: PressEffect { source: tdlibThumbnail }
}
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TDLibMinithumbnail {
id: minithumbnailLoader
active: !!minithumbnail && thumbnailImage.opacity < 1.0
}
BackgroundImage {
visible: tdlibThumbnail.useBackgroundImage && thumbnailImage.opacity < 1.0
}
// image thumbnail
TDLibImage {
id: thumbnailImage
anchors.fill: parent
enabled: !parent.isVideo
fileInformation: tdlibThumbnail.thumbnail ? tdlibThumbnail.thumbnail.file : {}
onStatusChanged: { //TODO check if this is really how it is ;)
if(status === Image.Error) {
// in some cases, webp is used (without correct mime type).
// we just try it blindly and cross our fingers:
tdlibThumbnail.videoMimeType = "image/webp";
tdlibThumbnail.isVideo = true;
}
}
}
// Fallback for video thumbnail format: try to use Nemo.Thumbnailer
Loader {
id: videoThumbnailLoader
active: parent.isVideo
asynchronous: true
anchors.fill: parent
sourceComponent: Component {
id: videoThumbnail
Thumbnail {
id: thumbnail
source: thumbnailImage.file.path
sourceSize.width: width
sourceSize.height: height
mimeType: tdlibThumbnail.videoMimeType
visible: opacity > 0
opacity: status === Thumbnail.Ready ? 1.0 : 0.0
Behavior on opacity { FadeAnimation {} }
}
}
}
}