2 Copyright (C) 2000-2007 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <gtkmm/window.h>
27 #include "pbd/controllable.h"
28 #include "pbd/compose.h"
30 #include "gtkmm2ext/gui_thread.h"
31 #include "gtkmm2ext/gtk_ui.h"
32 #include "gtkmm2ext/keyboard.h"
33 #include "gtkmm2ext/utils.h"
35 #include "ardour/pannable.h"
36 #include "ardour/panner.h"
38 #include "ardour_ui.h"
39 #include "global_signals.h"
40 #include "stereo_panner.h"
41 #include "rgb_macros.h"
48 using namespace Gtkmm2ext;
50 static const int pos_box_size = 8;
51 static const int lr_box_size = 15;
52 static const int step_down = 10;
53 static const int top_step = 2;
55 StereoPanner::ColorScheme StereoPanner::colors[3];
56 bool StereoPanner::have_colors = false;
58 using namespace ARDOUR;
60 StereoPanner::StereoPanner (boost::shared_ptr<Panner> panner)
62 , position_control (_panner->pannable()->pan_azimuth_control)
63 , width_control (_panner->pannable()->pan_width_control)
65 , dragging_position (false)
66 , dragging_left (false)
67 , dragging_right (false)
70 , accumulated_delta (0)
72 , drag_data_window (0)
74 , position_binder (position_control)
75 , width_binder (width_control)
82 position_control->Changed.connect (connections, invalidator(*this), boost::bind (&StereoPanner::value_change, this), gui_context());
83 width_control->Changed.connect (connections, invalidator(*this), boost::bind (&StereoPanner::value_change, this), gui_context());
85 set_flags (Gtk::CAN_FOCUS);
87 add_events (Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK|
88 Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|
89 Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|
91 Gdk::POINTER_MOTION_MASK);
93 ColorsChanged.connect (sigc::mem_fun (*this, &StereoPanner::color_handler));
96 StereoPanner::~StereoPanner ()
98 delete drag_data_window;
102 StereoPanner::set_drag_data ()
104 if (!drag_data_label) {
108 double pos = position_control->get_value(); // 0..1
110 /* We show the position of the center of the image relative to the left & right.
111 This is expressed as a pair of percentage values that ranges from (100,0)
112 (hard left) through (50,50) (hard center) to (0,100) (hard right).
114 This is pretty wierd, but its the way audio engineers expect it. Just remember that
115 the center of the USA isn't Kansas, its (50LA, 50NY) and it will all make sense.
119 snprintf (buf, sizeof (buf), "L:%3d R:%3d Width:%d%%", (int) rint (100.0 * (1.0 - pos)),
120 (int) rint (100.0 * pos),
121 (int) floor (100.0 * width_control->get_value()));
122 drag_data_label->set_markup (buf);
126 StereoPanner::value_change ()
133 StereoPanner::on_expose_event (GdkEventExpose* ev)
135 Glib::RefPtr<Gdk::Window> win (get_window());
136 Glib::RefPtr<Gdk::GC> gc (get_style()->get_base_gc (get_state()));
137 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
140 double pos = position_control->get_value (); /* 0..1 */
141 double swidth = width_control->get_value (); /* -1..+1 */
142 double fswidth = fabs (swidth);
145 const double corner_radius = 5.0;
148 height = get_height ();
152 } else if (swidth < 0.0) {
158 o = colors[state].outline;
159 f = colors[state].fill;
160 t = colors[state].text;
161 b = colors[state].background;
165 context->set_source_rgba (UINT_RGBA_R_FLT(b), UINT_RGBA_G_FLT(b), UINT_RGBA_B_FLT(b), UINT_RGBA_A_FLT(b));
166 rounded_rectangle (context, 0, 0, width, height, corner_radius);
169 /* the usable width is reduced from the real width, because we need space for
170 the two halves of LR boxes that will extend past the actual left/right
171 positions (indicated by the vertical line segment above them).
174 double usable_width = width - lr_box_size;
176 /* compute the centers of the L/R boxes based on the current stereo width */
178 if (fmod (usable_width,2.0) == 0) {
179 /* even width, but we need odd, so that there is an exact center.
180 So, offset cairo by 1, and reduce effective width by 1
183 context->translate (1.0, 0.0);
186 double center = (lr_box_size/2.0) + (usable_width * pos);
187 const double pan_spread = (fswidth * usable_width)/2.0;
188 const double half_lr_box = lr_box_size/2.0;
192 left = center - pan_spread; // center of left box
193 right = center + pan_spread; // center of right box
195 /* compute & draw the line through the box */
197 context->set_line_width (2);
198 context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
199 context->move_to (left, top_step+(pos_box_size/2.0)+step_down);
200 context->line_to (left, top_step+(pos_box_size/2.0));
201 context->line_to (right, top_step+(pos_box_size/2.0));
202 context->line_to (right, top_step+(pos_box_size/2.0) + step_down);
207 rounded_rectangle (context, left - half_lr_box,
208 half_lr_box+step_down,
209 lr_box_size, lr_box_size, corner_radius);
210 context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
211 context->stroke_preserve ();
212 context->set_source_rgba (UINT_RGBA_R_FLT(f), UINT_RGBA_G_FLT(f), UINT_RGBA_B_FLT(f), UINT_RGBA_A_FLT(f));
217 context->move_to (left - half_lr_box + 3,
218 (lr_box_size/2) + step_down + 13);
219 context->select_font_face ("sans-serif", Cairo::FONT_SLANT_NORMAL, Cairo::FONT_WEIGHT_BOLD);
222 context->set_source_rgba (UINT_RGBA_R_FLT(t), UINT_RGBA_G_FLT(t), UINT_RGBA_B_FLT(t), UINT_RGBA_A_FLT(t));
224 context->show_text (_("R"));
226 context->show_text (_("L"));
232 rounded_rectangle (context, right - half_lr_box,
233 half_lr_box+step_down,
234 lr_box_size, lr_box_size, corner_radius);
235 context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
236 context->stroke_preserve ();
237 context->set_source_rgba (UINT_RGBA_R_FLT(f), UINT_RGBA_G_FLT(f), UINT_RGBA_B_FLT(f), UINT_RGBA_A_FLT(f));
242 context->move_to (right - half_lr_box + 3, (lr_box_size/2)+step_down + 13);
243 context->set_source_rgba (UINT_RGBA_R_FLT(t), UINT_RGBA_G_FLT(t), UINT_RGBA_B_FLT(t), UINT_RGBA_A_FLT(t));
246 context->show_text (_("M"));
249 context->show_text (_("L"));
251 context->show_text (_("R"));
255 /* draw the central box */
257 context->set_line_width (2.0);
258 context->move_to (center + (pos_box_size/2.0), top_step); /* top right */
259 context->rel_line_to (0.0, pos_box_size); /* lower right */
260 context->rel_line_to (-pos_box_size/2.0, 4.0); /* bottom point */
261 context->rel_line_to (-pos_box_size/2.0, -4.0); /* lower left */
262 context->rel_line_to (0.0, -pos_box_size); /* upper left */
263 context->close_path ();
265 context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
266 context->stroke_preserve ();
267 context->set_source_rgba (UINT_RGBA_R_FLT(f), UINT_RGBA_G_FLT(f), UINT_RGBA_B_FLT(f), UINT_RGBA_A_FLT(f));
274 StereoPanner::on_button_press_event (GdkEventButton* ev)
276 drag_start_x = ev->x;
279 dragging_position = false;
280 dragging_left = false;
281 dragging_right = false;
283 accumulated_delta = 0;
286 /* Let the binding proxies get first crack at the press event
290 if (position_binder.button_press_handler (ev)) {
294 if (width_binder.button_press_handler (ev)) {
299 if (ev->button != 1) {
303 if (ev->type == GDK_2BUTTON_PRESS) {
304 int width = get_width();
306 if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) {
307 /* handled by button release */
313 /* upper section: adjusts position, constrained by width */
315 const double w = fabs (width_control->get_value ());
316 const double max_pos = 1.0 - (w/2.0);
317 const double min_pos = w/2.0;
319 if (ev->x <= width/3) {
320 /* left side dbl click */
321 if (Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier)) {
322 /* 2ndary-double click on left, collapse to hard left */
323 width_control->set_value (0);
324 position_control->set_value (0);
326 position_control->set_value (min_pos);
328 } else if (ev->x > 2*width/3) {
329 if (Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier)) {
330 /* 2ndary-double click on right, collapse to hard right */
331 width_control->set_value (0);
332 position_control->set_value (1.0);
334 position_control->set_value (max_pos);
337 position_control->set_value (0.5);
342 /* lower section: adjusts width, constrained by position */
344 const double p = position_control->get_value ();
345 const double max_width = 2.0 * min ((1.0 - p), p);
347 if (ev->x <= width/3) {
348 /* left side dbl click */
349 width_control->set_value (max_width); // reset width to 100%
350 } else if (ev->x > 2*width/3) {
351 /* right side dbl click */
352 width_control->set_value (-max_width); // reset width to inverted 100%
354 /* center dbl click */
355 width_control->set_value (0); // collapse width to 0%
361 } else if (ev->type == GDK_BUTTON_PRESS) {
363 if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) {
364 /* handled by button release */
369 /* top section of widget is for position drags */
370 dragging_position = true;
371 StartPositionGesture ();
373 /* lower section is for dragging width */
375 double pos = position_control->get_value (); /* 0..1 */
376 double swidth = width_control->get_value (); /* -1..+1 */
377 double fswidth = fabs (swidth);
378 int usable_width = get_width() - lr_box_size;
379 double center = (lr_box_size/2.0) + (usable_width * pos);
380 int left = lrint (center - (fswidth * usable_width / 2.0)); // center of leftmost box
381 int right = lrint (center + (fswidth * usable_width / 2.0)); // center of rightmost box
382 const int half_box = lr_box_size/2;
384 if (ev->x >= (left - half_box) && ev->x < (left + half_box)) {
386 dragging_right = true;
388 dragging_left = true;
390 } else if (ev->x >= (right - half_box) && ev->x < (right + half_box)) {
392 dragging_left = true;
394 dragging_right = true;
397 StartWidthGesture ();
407 StereoPanner::on_button_release_event (GdkEventButton* ev)
409 if (ev->button != 1) {
413 bool dp = dragging_position;
416 dragging_position = false;
417 dragging_left = false;
418 dragging_right = false;
419 accumulated_delta = 0;
422 if (drag_data_window) {
423 drag_data_window->hide ();
426 if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) {
427 /* reset to default */
428 position_control->set_value (0.5);
429 width_control->set_value (1.0);
432 StopPositionGesture ();
442 StereoPanner::on_scroll_event (GdkEventScroll* ev)
444 double one_degree = 1.0/180.0; // one degree as a number from 0..1, since 180 degrees is the full L/R axis
445 double pv = position_control->get_value(); // 0..1.0 ; 0 = left
446 double wv = width_control->get_value(); // 0..1.0 ; 0 = left
449 if (Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier)) {
452 step = one_degree * 5.0;
455 switch (ev->direction) {
456 case GDK_SCROLL_LEFT:
458 width_control->set_value (wv);
462 position_control->set_value (pv);
464 case GDK_SCROLL_RIGHT:
466 width_control->set_value (wv);
468 case GDK_SCROLL_DOWN:
470 position_control->set_value (pv);
478 StereoPanner::on_motion_notify_event (GdkEventMotion* ev)
484 if (!drag_data_window) {
485 drag_data_window = new Window (WINDOW_POPUP);
486 drag_data_window->set_name (X_("ContrastingPopup"));
487 drag_data_window->set_position (WIN_POS_MOUSE);
488 drag_data_window->set_decorated (false);
490 drag_data_label = manage (new Label);
491 drag_data_label->set_use_markup (true);
493 drag_data_window->set_border_width (6);
494 drag_data_window->add (*drag_data_label);
495 drag_data_label->show ();
497 Window* toplevel = dynamic_cast<Window*> (get_toplevel());
499 drag_data_window->set_transient_for (*toplevel);
503 if (!drag_data_window->is_visible ()) {
504 /* move the popup window vertically down from the panner display */
506 get_window()->get_origin (rx, ry);
507 drag_data_window->move (rx, ry+get_height());
508 drag_data_window->present ();
512 double delta = (ev->x - last_drag_x) / (double) w;
513 double current_width = width_control->get_value ();
519 if (dragging_left || dragging_right) {
521 /* maintain position as invariant as we change the width */
524 /* create a detent close to the center */
526 if (!detented && fabs (current_width) < 0.02) {
529 width_control->set_value (0);
534 accumulated_delta += delta;
536 /* have we pulled far enough to escape ? */
538 if (fabs (accumulated_delta) >= 0.025) {
539 width_control->set_value (current_width + accumulated_delta);
541 accumulated_delta = false;
545 width_control->set_value (current_width + delta);
548 } else if (dragging_position) {
550 double pv = position_control->get_value(); // 0..1.0 ; 0 = left
551 position_control->set_value (pv + delta);
559 StereoPanner::on_key_press_event (GdkEventKey* ev)
561 double one_degree = 1.0/180.0;
562 double pv = position_control->get_value(); // 0..1.0 ; 0 = left
563 double wv = width_control->get_value(); // 0..1.0 ; 0 = left
566 if (Keyboard::modifier_state_contains (ev->state, Keyboard::PrimaryModifier)) {
569 step = one_degree * 5.0;
572 /* up/down control width because we consider pan position more "important"
573 (and thus having higher "sense" priority) than width.
576 switch (ev->keyval) {
578 if (Keyboard::modifier_state_equals (ev->state, Keyboard::SecondaryModifier)) {
579 width_control->set_value (1.0);
581 width_control->set_value (wv + step);
585 if (Keyboard::modifier_state_equals (ev->state, Keyboard::SecondaryModifier)) {
586 width_control->set_value (-1.0);
588 width_control->set_value (wv - step);
593 position_control->set_value (pv);
597 position_control->set_value (pv);
603 width_control->set_value (0.0);
614 StereoPanner::on_key_release_event (GdkEventKey* ev)
620 StereoPanner::on_enter_notify_event (GdkEventCrossing* ev)
623 Keyboard::magic_widget_grab_focus ();
628 StereoPanner::on_leave_notify_event (GdkEventCrossing*)
630 Keyboard::magic_widget_drop_focus ();
635 StereoPanner::set_colors ()
637 colors[Normal].fill = ARDOUR_UI::config()->canvasvar_StereoPannerFill.get();
638 colors[Normal].outline = ARDOUR_UI::config()->canvasvar_StereoPannerOutline.get();
639 colors[Normal].text = ARDOUR_UI::config()->canvasvar_StereoPannerText.get();
640 colors[Normal].background = ARDOUR_UI::config()->canvasvar_StereoPannerBackground.get();
641 colors[Normal].rule = ARDOUR_UI::config()->canvasvar_StereoPannerRule.get();
643 colors[Mono].fill = ARDOUR_UI::config()->canvasvar_StereoPannerMonoFill.get();
644 colors[Mono].outline = ARDOUR_UI::config()->canvasvar_StereoPannerMonoOutline.get();
645 colors[Mono].text = ARDOUR_UI::config()->canvasvar_StereoPannerMonoText.get();
646 colors[Mono].background = ARDOUR_UI::config()->canvasvar_StereoPannerMonoBackground.get();
647 colors[Mono].rule = ARDOUR_UI::config()->canvasvar_StereoPannerRule.get();
649 colors[Inverted].fill = ARDOUR_UI::config()->canvasvar_StereoPannerInvertedFill.get();
650 colors[Inverted].outline = ARDOUR_UI::config()->canvasvar_StereoPannerInvertedOutline.get();
651 colors[Inverted].text = ARDOUR_UI::config()->canvasvar_StereoPannerInvertedText.get();
652 colors[Inverted].background = ARDOUR_UI::config()->canvasvar_StereoPannerInvertedBackground.get();
653 colors[Inverted].rule = ARDOUR_UI::config()->canvasvar_StereoPannerRule.get();
657 StereoPanner::color_handler ()