diff options
| -rw-r--r-- | libs/canvas/canvas/tracking_text.h | 49 | ||||
| -rw-r--r-- | libs/canvas/tracking_text.cc | 143 |
2 files changed, 192 insertions, 0 deletions
diff --git a/libs/canvas/canvas/tracking_text.h b/libs/canvas/canvas/tracking_text.h new file mode 100644 index 0000000000..901e5c2925 --- /dev/null +++ b/libs/canvas/canvas/tracking_text.h @@ -0,0 +1,49 @@ +/* + Copyright (C) 2011-2013 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 __ardour_canvas_tracking_text_h__ +#define __ardour_canvas_tracking_text_h__ + +#include <string> +#include "canvas/text.h" + +namespace ArdourCanvas { + +class LIBCANVAS_API TrackingText : public Text +{ + public: + TrackingText (Canvas*); + TrackingText (Item*); + + void show_and_track (bool track_x, bool track_y); + void set_offset (Duple const &); + void set_x_offset (double); + void set_y_offset (double); + + private: + bool track_x; + bool track_y; + Duple offset; + + void pointer_motion (Duple const&); + void init (); +}; + +} + +#endif /* __ardour_canvas_tracking_text_h__ */ diff --git a/libs/canvas/tracking_text.cc b/libs/canvas/tracking_text.cc new file mode 100644 index 0000000000..24def571d3 --- /dev/null +++ b/libs/canvas/tracking_text.cc @@ -0,0 +1,143 @@ +/* + Copyright (C) 2011-2013 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 <algorithm> + +#include "canvas/canvas.h" +#include "canvas/tracking_text.h" + +using namespace ArdourCanvas; + +TrackingText::TrackingText (Canvas* c) + : Text (c) + , track_x (true) + , track_y (true) + , offset (Duple (10, 10)) +{ + init (); +} + +TrackingText::TrackingText (Item* p) + : Text (p) + , track_x (true) + , track_y (true) + , offset (Duple (10, 10)) +{ + init (); +} + +void +TrackingText::init () +{ + _canvas->MouseMotion.connect (sigc::mem_fun (*this, &TrackingText::pointer_motion)); + set_ignore_events (true); + hide (); +} + +void +TrackingText::pointer_motion (Duple const & winpos) +{ + if (!_visible) { + return; + } + + Duple pos (_parent->window_to_item (winpos)); + + if (!track_x) { + pos.x = position().x; + } + + if (!track_y) { + pos.y = position().y; + } + + pos = pos.translate (offset); + + /* keep inside the window */ + + Rect r (0, 0, _canvas->width(), _canvas->height()); + + /* border of 200 pixels on the right, and 50 on all other sides */ + + const double border = 50.0; + + r.x0 += border; + r.x1 = std::max (r.x0, (r.x1 - 200.0)); + r.y0 += border; + r.y1 = std::max (r.y0, (r.y1 - border)); + + /* clamp */ + + if (pos.x < r.x0) { + pos.x = r.x0; + } else if (pos.x > r.x1) { + pos.x = r.x1; + } + + if (pos.y < r.y0) { + pos.y = r.y0; + } else if (pos.y > r.y1) { + pos.y = r.y1; + } + + /* move */ + + set_position (pos); +} + +void +TrackingText::show_and_track (bool tx, bool ty) +{ + track_x = tx; + track_y = ty; + + bool was_visible = _visible; + show (); + + if (!was_visible) { + /* move to current pointer location. do this after show() so that + * _visible is true, and thus ::pointer_motion() will do + * something. + */ + Duple winpos; + + if (!_canvas->get_mouse_position (winpos)) { + return; + } + + pointer_motion (winpos); + } +} + +void +TrackingText::set_x_offset (double o) +{ + offset.x = o; +} + +void +TrackingText::set_y_offset (double o) +{ + offset.y = o; +} + +void +TrackingText::set_offset (Duple const & d) +{ + offset = d; +} |