Rewrite parts of context to be adjustable and adjust album to width

src/context/contextalbum.h

@@ -0,0 +1,84 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2020, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * 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 CONTEXTALBUM_H
+#define CONTEXTALBUM_H
+
+#include "config.h"
+
+#include <memory>
+
+#include <QtGlobal>
+#include <QObject>
+#include <QWidget>
+#include <QString>
+#include <QImage>
+#include <QPixmap>
+#include <QMovie>
+
+#include "covermanager/albumcoverloaderoptions.h"
+
+class QTimeLine;
+class QPainter;
+class QPaintEvent;
+
+class AlbumCoverChoiceController;
+
+class ContextAlbum : public QWidget {
+  Q_OBJECT
+
+ public:
+  ContextAlbum(QWidget *parent = nullptr);
+
+  void Init(AlbumCoverChoiceController *album_cover_choice_controller);
+  void SetImage(QImage image = QImage());
+
+ protected:
+  void paintEvent(QPaintEvent*);
+
+ private:
+  void DrawImage(QPainter *p);
+  void ScaleCover();
+  void GetCoverAutomatically();
+
+ signals:
+  void FadeStopFinished();
+
+ private slots:
+  void SearchCoverInProgress();
+  void AutomaticCoverSearchDone();
+  void FadePreviousTrack(const qreal value);
+
+ private:
+  static const int kWidgetSpacing;
+  AlbumCoverChoiceController *album_cover_choice_controller_;
+  AlbumCoverLoaderOptions cover_loader_options_;
+  bool downloading_covers_;
+  QTimeLine *timeline_fade_;
+  QImage image_strawberry_;
+  QImage image_original_;
+  QImage image_previous_;
+  QPixmap pixmap_current_;
+  QPixmap pixmap_previous_;
+  qreal pixmap_previous_opacity_;
+  std::unique_ptr<QMovie> spinner_animation_;
+  int prev_width_;
+};
+
+#endif  // CONTEXTALBUM_H