2 Copyright (C) 2006 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.
18 $Id: fastmeter.h 570 2006-06-07 21:21:21Z sampo $
24 #include "pbd/stacktrace.h"
26 #include "gtkmm2ext/pixfader.h"
27 #include "gtkmm2ext/keyboard.h"
28 #include "gtkmm2ext/rgb_macros.h"
29 #include "gtkmm2ext/utils.h"
31 using namespace Gtkmm2ext;
35 #define CORNER_RADIUS 4
36 #define FADER_RESERVE (2*CORNER_RADIUS)
38 std::list<PixFader::FaderImage*> PixFader::_patterns;
40 PixFader::PixFader (Gtk::Adjustment& adj, int orientation, int fader_length, int fader_girth)
44 , _orien (orientation)
50 default_value = adjustment.get_value();
51 update_unity_position ();
53 add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK|Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK);
55 adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
56 adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
59 PixFader::~PixFader ()
64 PixFader::find_pattern (double afr, double afg, double afb,
65 double abr, double abg, double abb,
68 for (list<FaderImage*>::iterator f = _patterns.begin(); f != _patterns.end(); ++f) {
69 if ((*f)->matches (afr, afg, afb, abr, abg, abb, w, h)) {
77 PixFader::create_patterns ()
79 Gdk::Color c = get_style()->get_fg (get_state());
84 fg = c.get_green_p ();
87 c = get_style()->get_bg (get_state());
90 bg = c.get_green_p ();
93 if ( !_text.empty()) {
94 _layout->get_pixel_size (_text_width, _text_height);
100 c = get_style()->get_text (get_state());
102 text_r = c.get_red_p ();
103 text_g = c.get_green_p ();
104 text_b = c.get_blue_p ();
106 cairo_surface_t* surface;
108 float radius = CORNER_RADIUS;
110 double w = get_width();
112 if (w <= 1 || get_height() <= 1) {
116 if ((pattern = find_pattern (fr, fg, fb, br, bg, bb, get_width(), get_height())) != 0) {
117 /* found it - use it */
121 if (_orien == VERT) {
123 surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width(), get_height() * 2.0);
124 tc = cairo_create (surface);
126 /* paint background + border */
128 cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, get_width(), 0);
129 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.8,bg*0.8,bb*0.8, 1.0);
130 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 1.0);
131 cairo_set_source (tc, shade_pattern);
132 cairo_rectangle (tc, 0, 0, get_width(), get_height() * 2.0);
135 cairo_pattern_destroy (shade_pattern);
137 /* paint lower shade */
141 shade_pattern = cairo_pattern_create_linear (0.0, 0.0, w, 0);
142 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
143 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
144 cairo_set_source (tc, shade_pattern);
145 Gtkmm2ext::rounded_top_half_rectangle (tc, 1.0, get_height(), w, get_height(), radius-1.5);
148 cairo_pattern_destroy (shade_pattern);
150 pattern = cairo_pattern_create_for_surface (surface);
154 surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width() * 2.0, get_height());
155 tc = cairo_create (surface);
157 /* paint right shade (background section)*/
159 cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
160 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.8,bg*0.8,bb*0.8, 1.0);
161 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 1.0);
162 cairo_set_source (tc, shade_pattern);
163 cairo_rectangle (tc, 0, 0, get_width() * 2.0, get_height());
166 /* paint left shade (active section/foreground) */
168 shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
169 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
170 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
171 cairo_set_source (tc, shade_pattern);
172 Gtkmm2ext::rounded_right_half_rectangle (tc, 0, 1, get_width(), get_height() - 2.0, radius-1.5);
174 cairo_pattern_destroy (shade_pattern);
176 pattern = cairo_pattern_create_for_surface (surface);
179 /* cache it for others to use */
181 _patterns.push_back (new FaderImage (pattern, fr, fg, fb, br, bg, bb, get_width(), get_height()));
184 cairo_surface_destroy (surface);
188 PixFader::on_expose_event (GdkEventExpose* ev)
190 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
191 cairo_t* cr = context->cobj();
199 /* this isn't supposed to be happen, but some wackiness whereby
200 the pixfader ends up with a 1xN or Nx1 size allocation
201 leads to it. the basic wackiness needs fixing but we
202 shouldn't crash. just fill in the expose area with
206 Gdk::Color c = get_style()->get_bg (get_state());
210 bg = c.get_green_p ();
211 bb = c.get_blue_p ();
212 cairo_set_source_rgb (cr, br, bg, bb);
213 cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
219 cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
222 int ds = display_span ();
223 float w = get_width();
224 float h = get_height();
226 cairo_matrix_t matrix;
228 if (_orien == VERT) {
230 if (ds > h - FADER_RESERVE) {
231 ds = h - FADER_RESERVE;
234 cairo_set_source (cr, pattern);
235 cairo_matrix_init_translate (&matrix, 0, (h - ds));
236 cairo_pattern_set_matrix (pattern, &matrix);
237 Gtkmm2ext::rounded_rectangle (cr, 0, 0, w, h, CORNER_RADIUS-1.5);
242 if (ds < FADER_RESERVE) {
247 if ds == w, the pattern does not need to be translated
248 if ds == 0 (or FADER_RESERVE), the pattern needs to be moved
249 w to the left, which is -w in pattern space, and w in
251 if ds == 10, then the pattern needs to be moved w - 10
252 to the left, which is -(w-10) in pattern space, which
253 is (w - 10) in user space
255 thus: translation = (w - ds)
258 cairo_set_source (cr, pattern);
259 cairo_matrix_init_translate (&matrix, w - ds, 0);
260 cairo_pattern_set_matrix (pattern, &matrix);
261 Gtkmm2ext::rounded_rectangle (cr, 0, 0, w, h, CORNER_RADIUS-1.5);
265 /* draw the unity-position line if it's not at either end*/
267 context->set_line_width (1);
268 context->set_line_cap (Cairo::LINE_CAP_ROUND);
269 Gdk::Color c = get_style()->get_fg (Gtk::STATE_ACTIVE);
270 context->set_source_rgba (c.get_red_p()*1.5, c.get_green_p()*1.5, c.get_blue_p()*1.5, 0.85);
271 if ( _orien == VERT) {
272 if (unity_loc < h ) {
273 context->move_to (1.5, unity_loc + .5);
274 context->line_to (girth - 1.5, unity_loc + .5);
278 if ( unity_loc < w ){
279 context->move_to (unity_loc + .5, 1.5);
280 context->line_to (unity_loc + .5, girth - 1.5);
286 if ( !_text.empty() ) {
290 cairo_move_to (cr, (get_width() - _text_width)/2.0, get_height()/2.0 - _text_height/2.0);
291 cairo_set_source_rgba (cr, text_r, text_g, text_b, 0.9);
292 pango_cairo_show_layout (cr, _layout->gobj());
295 // if (Config->get_widget_prelight()) { //pixfader does not have access to config
297 Gtkmm2ext::rounded_rectangle (cr, 0, 0, get_width(), get_height(), 3);
298 cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.1);
309 PixFader::on_size_request (GtkRequisition* req)
311 if (_orien == VERT) {
312 req->width = (girth ? girth : -1);
313 req->height = (span ? span : -1);
315 req->height = (girth ? girth : -1);
316 req->width = (span ? span : -1);
321 PixFader::on_size_allocate (Gtk::Allocation& alloc)
323 DrawingArea::on_size_allocate(alloc);
325 if (_orien == VERT) {
326 girth = alloc.get_width ();
327 span = alloc.get_height ();
329 girth = alloc.get_height ();
330 span = alloc.get_width ();
334 /* recreate patterns in case we've changed size */
338 update_unity_position ();
342 PixFader::on_button_press_event (GdkEventButton* ev)
344 if (ev->type != GDK_BUTTON_PRESS) {
348 if (ev->button != 1 && ev->button != 2) {
353 grab_loc = (_orien == VERT) ? ev->y : ev->x;
354 grab_start = (_orien == VERT) ? ev->y : ev->x;
355 grab_window = ev->window;
357 gdk_pointer_grab(ev->window,false,
358 GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK),
361 if (ev->button == 2) {
362 set_adjustment_from_event (ev);
369 PixFader::on_button_release_event (GdkEventButton* ev)
371 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
373 switch (ev->button) {
378 gdk_pointer_ungrab (GDK_CURRENT_TIME);
381 Keyboard::magic_widget_drop_focus();
385 if (ev_pos == grab_start) {
387 /* no motion - just a click */
389 if (ev->state & Keyboard::TertiaryModifier) {
390 adjustment.set_value (default_value);
391 } else if (ev->state & Keyboard::GainFineScaleModifier) {
392 adjustment.set_value (adjustment.get_lower());
393 } else if ((_orien == VERT && ev_pos < display_span()) || (_orien == HORIZ && ev_pos > display_span())) {
394 /* above the current display height, remember X Window coords */
395 adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment());
397 adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment());
408 set_adjustment_from_event (ev);
409 gdk_pointer_ungrab (GDK_CURRENT_TIME);
422 PixFader::on_scroll_event (GdkEventScroll* ev)
427 if (ev->state & Keyboard::GainFineScaleModifier) {
428 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
437 if (_orien == VERT) {
439 /* should left/right scroll affect vertical faders ? */
441 switch (ev->direction) {
444 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
447 case GDK_SCROLL_DOWN:
448 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
456 /* up/down scrolls should definitely affect horizontal faders
457 because they are so much easier to use
460 switch (ev->direction) {
462 case GDK_SCROLL_RIGHT:
464 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
467 case GDK_SCROLL_LEFT:
468 case GDK_SCROLL_DOWN:
469 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
480 PixFader::on_motion_notify_event (GdkEventMotion* ev)
484 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
486 if (ev->window != grab_window) {
488 grab_window = ev->window;
492 if (ev->state & Keyboard::GainFineScaleModifier) {
493 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
500 double const delta = ev_pos - grab_loc;
503 double fract = (delta / span);
505 fract = min (1.0, fract);
506 fract = max (-1.0, fract);
508 // X Window is top->bottom for 0..Y
510 if (_orien == VERT) {
514 adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower()));
521 PixFader::adjustment_changed ()
523 if (display_span() != last_drawn) {
528 /** @return pixel offset of the current value from the right or bottom of the fader */
530 PixFader::display_span ()
532 float fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower()));
534 if (_orien == VERT) {
535 ds = (int)floor ( span * (1.0 - fract));
537 ds = (int)floor (span * fract);
544 PixFader::update_unity_position ()
546 if (_orien == VERT) {
547 unity_loc = (int) rint (span * (1 - (default_value / (adjustment.get_upper() - adjustment.get_lower())))) - 1;
549 unity_loc = (int) rint (default_value * span / (adjustment.get_upper() - adjustment.get_lower()));
556 PixFader::on_enter_notify_event (GdkEventCrossing*)
559 Keyboard::magic_widget_grab_focus ();
565 PixFader::on_leave_notify_event (GdkEventCrossing*)
569 Keyboard::magic_widget_drop_focus();
576 PixFader::set_adjustment_from_event (GdkEventButton* ev)
578 double fract = (_orien == VERT) ? (1.0 - (ev->y / span)) : (ev->x / span);
580 fract = min (1.0, fract);
581 fract = max (0.0, fract);
583 adjustment.set_value (fract * (adjustment.get_upper () - adjustment.get_lower ()));
587 PixFader::set_default_value (float d)
590 update_unity_position ();
594 PixFader::set_text (const std::string& str)
598 if (!_layout && !_text.empty()) {
599 _layout = Pango::Layout::create (get_pango_context());
603 _layout->set_text (str);
604 _layout->get_pixel_size (_text_width, _text_height);
611 PixFader::on_state_changed (Gtk::StateType old_state)
613 Widget::on_state_changed (old_state);
618 PixFader::on_style_changed (const Glib::RefPtr<Gtk::Style>&)
621 std::string txt = _layout->get_text();
622 _layout.clear (); // drop reference to existing layout
626 /* remember that all patterns are cached and not owned by an individual
627 pixfader. we will lazily create a new pattern when needed.