Add moodbar

src/moodbar/moodbaritemdelegate.h

@@ -0,0 +1,90 @@
+/* This file is part of Clementine.
+   Copyright 2012, David Sansome <me@davidsansome.com>
+
+   Strawberry 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.
+
+   Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef MOODBARITEMDELEGATE_H
+#define MOODBARITEMDELEGATE_H
+
+#include "moodbarrenderer.h"
+
+#include <QObject>
+#include <QItemDelegate>
+#include <QCache>
+#include <QFuture>
+#include <QSet>
+#include <QByteArray>
+#include <QUrl>
+#include <QPainter>
+
+class Application;
+class MoodbarPipeline;
+class PlaylistView;
+
+class MoodbarItemDelegate : public QItemDelegate {
+  Q_OBJECT
+
+ public:
+  MoodbarItemDelegate(Application* app, PlaylistView* view, QObject* parent = nullptr);
+
+  void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const;
+
+ private slots:
+  void ReloadSettings();
+
+  void DataLoaded(const QUrl& url, MoodbarPipeline* pipeline);
+  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_;
+  };
+
+ 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);
+
+  bool RemoveFromCacheIfIndexesInvalid(const QUrl& url, Data* data);
+
+  void ReloadAllColors();
+
+ private:
+  Application* app_;
+  PlaylistView* view_;
+  QCache<QUrl, Data> data_;
+
+  MoodbarRenderer::MoodbarStyle style_;
+};
+
+#endif  // MOODBARITEMDELEGATE_H