Add moodbar

src/moodbar/moodbarproxystyle.h

@@ -0,0 +1,103 @@
+/* This file was 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 MOODBARPROXYSTYLE_H
+#define MOODBARPROXYSTYLE_H
+
+#include <QProxyStyle>
+#include <QTimeLine>
+#include <QByteArray>
+#include <QPixmap>
+#include <QPainter>
+#include <QSlider>
+#include <QMenu>
+#include <QActionGroup>
+#include <QStyleOptionSlider>
+#include <QEvent>
+
+#include "moodbarrenderer.h"
+
+class Application;
+
+class MoodbarProxyStyle : public QProxyStyle {
+  Q_OBJECT
+
+ public:
+  MoodbarProxyStyle(Application* app, QSlider* slider);
+
+  // QProxyStyle
+  void drawComplexControl(ComplexControl control, const QStyleOptionComplex* option, QPainter* painter, const QWidget* widget) const;
+  QRect subControlRect(ComplexControl cc, const QStyleOptionComplex* opt, SubControl sc, const QWidget* widget) const;
+
+  // QObject
+  bool eventFilter(QObject* object, QEvent* event);
+
+ public slots:
+  // An empty byte array means there's no moodbar, so just show a normal slider.
+  void SetMoodbarData(const QByteArray& data);
+
+  // If the moodbar is disabled then a normal slider will always be shown.
+  void SetMoodbarEnabled(bool enabled);
+
+ private:
+  static const int kMarginSize;
+  static const int kBorderSize;
+  static const int kArrowWidth;
+  static const int kArrowHeight;
+
+  enum State { MoodbarOn, MoodbarOff, FadingToOn, FadingToOff };
+
+ private:
+  void NextState();
+
+  void Render(ComplexControl control, const QStyleOptionSlider* option, QPainter* painter, const QWidget* widget);
+  void EnsureMoodbarRendered(const QStyleOptionSlider* opt);
+  void DrawArrow(const QStyleOptionSlider* option, QPainter* painter) const;
+  void ShowContextMenu(const QPoint& pos);
+
+  QPixmap MoodbarPixmap(const ColorVector& colors, const QSize& size, const QPalette& palette, const QStyleOptionSlider* opt);
+
+ private slots:
+  void ReloadSettings();
+  void FaderValueChanged(qreal value);
+  void ChangeStyle(QAction* action);
+
+ private:
+  Application* app_;
+  QSlider* slider_;
+
+  bool enabled_;
+  QByteArray data_;
+  MoodbarRenderer::MoodbarStyle moodbar_style_;
+
+  State state_;
+  QTimeLine* fade_timeline_;
+
+  QPixmap fade_source_;
+  QPixmap fade_target_;
+
+  bool moodbar_colors_dirty_;
+  bool moodbar_pixmap_dirty_;
+  ColorVector moodbar_colors_;
+  QPixmap moodbar_pixmap_;
+
+  QMenu* context_menu_;
+  QAction* show_moodbar_action_;
+  QActionGroup* style_action_group_;
+};
+
+#endif  // MOODBARPROXYSTYLE_H