Use virtual functions for OSD

src/osd/osdpretty.h

@@ -0,0 +1,176 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2010, David Sansome <me@davidsansome.com>
+ * Copyright 2019, 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 OSDPRETTY_H
+#define OSDPRETTY_H
+
+#include "config.h"
+
+#include <QtGlobal>
+#include <QObject>
+#include <QWidget>
+#include <QMap>
+#include <QString>
+#include <QImage>
+#include <QPixmap>
+#include <QColor>
+#include <QFont>
+#include <QPoint>
+#include <QRect>
+#include <QRgb>
+
+class QScreen;
+class QTimer;
+class QTimeLine;
+class QEvent;
+class QMouseEvent;
+class QPaintEvent;
+class QShowEvent;
+
+class Ui_OSDPretty;
+
+class OSDPretty : public QWidget {
+  Q_OBJECT
+
+ public:
+  enum Mode {
+    Mode_Popup,
+    Mode_Draggable,
+  };
+
+  explicit OSDPretty(Mode mode, QWidget *parent = nullptr);
+  ~OSDPretty() override;
+
+  static const char *kSettingsGroup;
+
+  static const int kDropShadowSize;
+  static const int kBorderRadius;
+  static const int kMaxIconSize;
+
+  static const int kSnapProximity;
+
+  static const QRgb kPresetBlue;
+  static const QRgb kPresetRed;
+
+  static bool IsTransparencyAvailable();
+
+  void SetMessage(const QString &summary, const QString& message, const QImage &image);
+  void ShowMessage(const QString &summary, const QString& message, const QImage &image);
+
+  // Controls the fader.  This is enabled by default on Windows.
+  void set_fading_enabled(bool enabled) { fading_enabled_ = enabled; }
+
+  // Popup duration in seconds.  Only used in Mode_Popup.
+  void set_popup_duration(int msec);
+
+  // These will get overwritten when ReloadSettings() is called
+  void set_foreground_color(QRgb color);
+  void set_background_color(QRgb color);
+  void set_background_opacity(qreal opacity);
+  void set_font(QFont font);
+
+  QRgb foreground_color() const { return foreground_color_.rgb(); }
+  QRgb background_color() const { return background_color_.rgb(); }
+  qreal background_opacity() const { return background_opacity_; }
+  QString popup_screen() const { return popup_screen_name_; }
+  QPoint popup_pos() const { return popup_pos_; }
+  QFont font() const { return font_; }
+  bool disable_duration() const { return disable_duration_; }
+
+  // When the user has been moving the popup, use these to get its current position and screen.
+  // Note that these return invalid values if the popup is hidden.
+  QScreen *current_screen() const;
+  QScreen *current_screen(const QPoint &pos) const;
+  QPoint current_pos() const;
+
+  // QWidget
+  void setVisible(bool visible) override;
+
+  bool toggle_mode() const { return toggle_mode_; }
+  void set_toggle_mode(bool toggle_mode) { toggle_mode_ = toggle_mode; }
+
+ signals:
+  void PositionChanged();
+
+ public slots:
+  void ReloadSettings();
+
+ protected:
+  void paintEvent(QPaintEvent *e) override;
+  void enterEvent(QEvent *e) override;
+  void leaveEvent(QEvent *e) override;
+  void mousePressEvent(QMouseEvent *e) override;
+  void showEvent(QShowEvent *e) override;
+  void mouseMoveEvent(QMouseEvent *e) override;
+  void mouseReleaseEvent(QMouseEvent *e) override;
+
+ private:
+  void Reposition();
+  void Load();
+
+  QRect BoxBorder() const;
+
+ private slots:
+  void FaderValueChanged(qreal value);
+  void FaderFinished();
+  void ScreenAdded(QScreen *screen);
+  void ScreenRemoved(QScreen *screen);
+
+ private:
+  Ui_OSDPretty *ui_;
+
+  Mode mode_;
+
+  // Settings loaded from QSettings
+  QColor foreground_color_;
+  QColor background_color_;
+  float background_opacity_;
+  QString popup_screen_name_;
+  QPoint popup_pos_;
+  QScreen *popup_screen_;
+  QFont font_;
+  // The OSD is kept always on top until you click (no timer)
+  bool disable_duration_;
+
+  // Cached pixmaps
+  QPixmap shadow_edge_[4];
+  QPixmap shadow_corner_[4];
+  QPixmap background_;
+
+  // For dragging the OSD
+  QPoint original_window_pos_;
+  QPoint drag_start_pos_;
+
+  // For timeout of notification
+  QTimer *timeout_;
+
+  // For fading
+  bool fading_enabled_;
+  QTimeLine *fader_;
+
+  // Toggling requested, we have to show or hide the OSD
+  bool toggle_mode_;
+
+  QMap<QString, QScreen*> screens_;
+
+};
+
+#endif  // OSDPRETTY_H