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Diffstat (limited to 'libs/widgets/widgets/ardour_fader.h')
| -rw-r--r-- | libs/widgets/widgets/ardour_fader.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/libs/widgets/widgets/ardour_fader.h b/libs/widgets/widgets/ardour_fader.h new file mode 100644 index 0000000000..b9270cae51 --- /dev/null +++ b/libs/widgets/widgets/ardour_fader.h @@ -0,0 +1,158 @@ +/* + Copyright (C) 2006 Paul Davis + + This program 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 2 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#ifndef _WIDGETS_ARDOUR_FADER_H_ +#define _WIDGETS_ARDOUR_FADER_H_ + +#include <cmath> +#include <stdint.h> + +#include <gdkmm.h> +#include <gtkmm/adjustment.h> + +#include "gtkmm2ext/cairo_widget.h" +#include "widgets/visibility.h" + +namespace ArdourWidgets { + +class LIBWIDGETS_API ArdourFader : public CairoWidget +{ +public: + ArdourFader (Gtk::Adjustment& adjustment, int orientation, int span, int girth); + virtual ~ArdourFader (); + static void flush_pattern_cache(); + + sigc::signal<void> StartGesture; + sigc::signal<void> StopGesture; + sigc::signal<void> OnExpose; + + void set_default_value (float); + void set_text (const std::string&, bool centered = true, bool expose = true); + + enum Tweaks { + NoShowUnityLine = 0x1, + NoButtonForward = 0x2, + NoVerticalScroll = 0x4, + }; + + Tweaks tweaks() const { return _tweaks; } + void set_tweaks (Tweaks); + +protected: + void on_size_request (GtkRequisition*); + void on_size_allocate (Gtk::Allocation& alloc); + + void render (Cairo::RefPtr<Cairo::Context> const&, cairo_rectangle_t*); + bool on_grab_broken_event (GdkEventGrabBroken*); + bool on_button_press_event (GdkEventButton*); + bool on_button_release_event (GdkEventButton*); + bool on_motion_notify_event (GdkEventMotion*); + bool on_scroll_event (GdkEventScroll* ev); + bool on_enter_notify_event (GdkEventCrossing* ev); + bool on_leave_notify_event (GdkEventCrossing* ev); + + void on_state_changed (Gtk::StateType); + void on_style_changed (const Glib::RefPtr<Gtk::Style>&); + + enum Orientation { + VERT, + HORIZ, + }; + +private: + Glib::RefPtr<Pango::Layout> _layout; + std::string _text; + Tweaks _tweaks; + Gtk::Adjustment& _adjustment; + int _text_width; + int _text_height; + + int _span, _girth; + int _min_span, _min_girth; + int _orien; + cairo_pattern_t* _pattern; + bool _hovering; + GdkWindow* _grab_window; + double _grab_loc; + double _grab_start; + bool _dragging; + float _default_value; + int _unity_loc; + bool _centered_text; + + sigc::connection _parent_style_change; + Widget * _current_parent; + Gdk::Color get_parent_bg (); + + void create_patterns(); + void adjustment_changed (); + void set_adjustment_from_event (GdkEventButton *); + void update_unity_position (); + int display_span (); + + struct FaderImage { + cairo_pattern_t* pattern; + double fr; + double fg; + double fb; + double br; + double bg; + double bb; + int width; + int height; + + FaderImage (cairo_pattern_t* p, + double afr, double afg, double afb, + double abr, double abg, double abb, + int w, int h) + : pattern (p) + , fr (afr) + , fg (afg) + , fb (afb) + , br (abr) + , bg (abg) + , bb (abb) + , width (w) + , height (h) + {} + + bool matches (double afr, double afg, double afb, + double abr, double abg, double abb, + int w, int h) { + return width == w && + height == h && + afr == fr && + afg == fg && + afb == fb && + abr == br && + abg == bg && + abb == bb; + } + }; + + static std::list<FaderImage*> _patterns; + static cairo_pattern_t* find_pattern (double afr, double afg, double afb, + double abr, double abg, double abb, + int w, int h); + +}; + +} /* namespace */ + +#endif /* __gtkmm2ext_pixfader_h__ */ |