Clementine-audio-player-Mac.../src/moodbar/moodbaritemdelegate.h

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/* This file is part of Clementine.
Copyright 2012, David Sansome <me@davidsansome.com>
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Clementine 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.
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Clementine 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.
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You should have received a copy of the GNU General Public License
along with Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MOODBARITEMDELEGATE_H
#define MOODBARITEMDELEGATE_H
#include <QCache>
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#include <QFuture>
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#include <QItemDelegate>
#include <QUrl>
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#include "moodbarrenderer.h"
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class Application;
class MoodbarPipeline;
class PlaylistView;
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class QModelIndex;
class MoodbarItemDelegate : public QItemDelegate {
Q_OBJECT
public:
MoodbarItemDelegate(Application* app, PlaylistView* view,
QObject* parent = nullptr);
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void paint(QPainter* painter, const QStyleOptionViewItem& option,
const QModelIndex& index) const;
private slots:
void ReloadSettings();
void DataLoaded(const QUrl& url, MoodbarPipeline* pipeline);
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void ColorsLoaded(const QUrl& url, QFuture<ColorVector> future);
void ImageLoaded(const QUrl& url, QFuture<QImage> future);
private:
struct Data {
Data();
enum State {
State_None,
State_CannotLoad,
State_LoadingData,
State_LoadingColors,
State_LoadingImage,
State_Loaded
};
QSet<QPersistentModelIndex> indexes_;
State state_;
ColorVector colors_;
QSize desired_size_;
QPixmap pixmap_;
};
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private:
QPixmap PixmapForIndex(const QModelIndex& index, const QSize& size);
void StartLoadingData(const QUrl& url, Data* data);
void StartLoadingColors(const QUrl& url, const QByteArray& bytes, Data* data);
void StartLoadingImage(const QUrl& url, Data* data);
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bool RemoveFromCacheIfIndexesInvalid(const QUrl& url, Data* data);
void ReloadAllColors();
private:
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Application* app_;
PlaylistView* view_;
QCache<QUrl, Data> data_;
MoodbarRenderer::MoodbarStyle style_;
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};
#endif // MOODBARITEMDELEGATE_H