diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2018-07-03 11:21:25 -0400 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2018-07-03 11:21:25 -0400 |
commit | ed24e01658dadffaa6abdc6cd32ee1773bacb526 (patch) | |
tree | 2f0f676d4104fd02b7be826157a2a7d4b5db2a62 | |
parent | 5102d8fae14c2a2acf9e575e6d83e34726379e6f (diff) |
initial implementation of a more specialized canvas item for (sustained) notes
-rw-r--r-- | libs/canvas/canvas/note.h | 44 | ||||
-rw-r--r-- | libs/canvas/note.cc | 85 |
2 files changed, 129 insertions, 0 deletions
diff --git a/libs/canvas/canvas/note.h b/libs/canvas/canvas/note.h new file mode 100644 index 0000000000..2dd3ac6a7b --- /dev/null +++ b/libs/canvas/canvas/note.h @@ -0,0 +1,44 @@ +/* + Copyright (C) 2018 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 __CANVAS_NOTE_H__ +#define __CANVAS_NOTE_H__ + +#include "canvas/visibility.h" +#include "canvas/rectangle.h" + +namespace ArdourCanvas +{ + +class LIBCANVAS_API Note : public Rectangle +{ +public: + Note (Canvas*); + Note (Item*); + + void render (Rect const &, Cairo::RefPtr<Cairo::Context>) const; + void set_velocity (double fract); + + private: + static bool _show_velocity_bars; + double _velocity; +}; + +} + +#endif /* __CANVAS_NOTE_H__ */ diff --git a/libs/canvas/note.cc b/libs/canvas/note.cc new file mode 100644 index 0000000000..0d029b4bd0 --- /dev/null +++ b/libs/canvas/note.cc @@ -0,0 +1,85 @@ +/* + Copyright (C) 2018 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. +*/ + +#include <cairomm/context.h> + +#include "gtkmm2ext/colors.h" + +#include "canvas/note.h" +#include "canvas/debug.h" + +using namespace std; +using namespace ArdourCanvas; + +bool Note::_show_velocity_bars = true; + +Note::Note (Canvas* c) + : Rectangle (c) + , _velocity (0.5) +{ +} + +Note::Note (Item* parent) + : Rectangle (parent) + , _velocity (0.5) +{ +} + +void +Note::set_velocity (double fract) +{ + _velocity = max (0.0, min (1.0, fract)); + redraw (); +} + +void +Note::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const +{ + Rectangle::render (area, context); + + if (_show_velocity_bars && _velocity > 0.0) { + + Rect self (item_to_window (Rectangle::get().translate (_position), false)); + + if ((self.y1 - self.y0) < 5) { + /* not tall enough to show a velocity bar */ + return; + } + + /* 2 pixel margin above and below + outline_width() margin on left + set width based on velocity + */ + + self.y0 = self.y0 + 2; + self.y1 = self.y1 - 2; + const double width = (self.x1 - self.x0) - (2 * outline_width()); + self.x0 = self.x0 + outline_width(); + self.x1 = self.x0 + (width * _velocity); + + const Rect draw = self.intersection (area); + + if (!draw) { + return; + } + + Gtkmm2ext::set_source_rgba (context, Gtkmm2ext::contrasting_text_color (fill_color())); + context->rectangle (draw.x0, draw.y0, draw.width(), draw.height()); + context->fill (); + } +} |