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 $
25 #include "pbd/stacktrace.h"
27 #include "gtkmm2ext/cairo_widget.h"
28 #include "gtkmm2ext/keyboard.h"
29 #include "gtkmm2ext/pixfader.h"
30 #include "gtkmm2ext/utils.h"
32 using namespace Gtkmm2ext;
36 #define CORNER_RADIUS 2.5
38 #define CORNER_OFFSET 1
39 #define FADER_RESERVE 6
41 std::list<PixFader::FaderImage*> PixFader::_patterns;
43 PixFader::PixFader (Gtk::Adjustment& adj, int orientation, int fader_length, int fader_girth)
49 , _span (fader_length)
50 , _girth (fader_girth)
51 , _min_span (fader_length)
52 , _min_girth (fader_girth)
53 , _orien (orientation)
58 , _centered_text (true)
61 _default_value = _adjustment.get_value();
62 update_unity_position ();
65 Gdk::BUTTON_PRESS_MASK
66 | Gdk::BUTTON_RELEASE_MASK
67 | Gdk::POINTER_MOTION_MASK
69 | Gdk::ENTER_NOTIFY_MASK
70 | Gdk::LEAVE_NOTIFY_MASK
73 _adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
74 _adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
77 DrawingArea::set_size_request(_girth, _span);
79 DrawingArea::set_size_request(_span, _girth);
83 PixFader::~PixFader ()
85 if (_parent_style_change) _parent_style_change.disconnect();
86 if (_layout) _layout.clear (); // drop reference to existing layout
90 PixFader::find_pattern (double afr, double afg, double afb,
91 double abr, double abg, double abb,
94 for (list<FaderImage*>::iterator f = _patterns.begin(); f != _patterns.end(); ++f) {
95 if ((*f)->matches (afr, afg, afb, abr, abg, abb, w, h)) {
103 PixFader::create_patterns ()
105 Gdk::Color c = get_style()->get_fg (get_state());
110 fg = c.get_green_p ();
111 fb = c.get_blue_p ();
113 c = get_style()->get_bg (get_state());
116 bg = c.get_green_p ();
117 bb = c.get_blue_p ();
119 cairo_surface_t* surface;
122 if (get_width() <= 1 || get_height() <= 1) {
126 if ((_pattern = find_pattern (fr, fg, fb, br, bg, bb, get_width(), get_height())) != 0) {
127 /* found it - use it */
131 if (_orien == VERT) {
133 surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width(), get_height() * 2.0);
134 tc = cairo_create (surface);
136 /* paint background + border */
138 cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, get_width(), 0);
139 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.4,bg*0.4,bb*0.4, 1.0);
140 cairo_pattern_add_color_stop_rgba (shade_pattern, 0.25, br*0.6,bg*0.6,bb*0.6, 1.0);
141 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.8,bg*0.8,bb*0.8, 1.0);
142 cairo_set_source (tc, shade_pattern);
143 cairo_rectangle (tc, 0, 0, get_width(), get_height() * 2.0);
146 cairo_pattern_destroy (shade_pattern);
148 /* paint lower shade */
150 shade_pattern = cairo_pattern_create_linear (0.0, 0.0, get_width() - 2 - CORNER_OFFSET , 0);
151 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
152 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
153 cairo_set_source (tc, shade_pattern);
154 Gtkmm2ext::rounded_top_half_rectangle (tc, CORNER_OFFSET, get_height() + CORNER_OFFSET,
155 get_width() - CORNER_SIZE, get_height(), CORNER_RADIUS);
158 cairo_pattern_destroy (shade_pattern);
160 _pattern = cairo_pattern_create_for_surface (surface);
164 surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width() * 2.0, get_height());
165 tc = cairo_create (surface);
167 /* paint right shade (background section)*/
169 cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
170 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.4,bg*0.4,bb*0.4, 1.0);
171 cairo_pattern_add_color_stop_rgba (shade_pattern, 0.25, br*0.6,bg*0.6,bb*0.6, 1.0);
172 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.8,bg*0.8,bb*0.8, 1.0);
173 cairo_set_source (tc, shade_pattern);
174 cairo_rectangle (tc, 0, 0, get_width() * 2.0, get_height());
177 /* paint left shade (active section/foreground) */
179 shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
180 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
181 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
182 cairo_set_source (tc, shade_pattern);
183 Gtkmm2ext::rounded_right_half_rectangle (tc, CORNER_OFFSET, CORNER_OFFSET,
184 get_width() - CORNER_OFFSET, get_height() - CORNER_SIZE, CORNER_RADIUS);
186 cairo_pattern_destroy (shade_pattern);
188 _pattern = cairo_pattern_create_for_surface (surface);
191 /* cache it for others to use */
193 _patterns.push_back (new FaderImage (_pattern, fr, fg, fb, br, bg, bb, get_width(), get_height()));
196 cairo_surface_destroy (surface);
200 PixFader::on_expose_event (GdkEventExpose* ev)
202 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
203 cairo_t* cr = context->cobj();
205 // clip to expose area
206 cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
214 /* this isn't supposed to be happen, but some wackiness whereby
215 * the pixfader ends up with a 1xN or Nx1 size allocation
216 * leads to it. the basic wackiness needs fixing but we
217 * shouldn't crash. just fill in the expose area with
221 CairoWidget::set_source_rgb_a (cr, get_style()->get_bg (get_state()), 1);
222 cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
228 int ds = display_span ();
229 const float w = get_width();
230 const float h = get_height();
232 CairoWidget::set_source_rgb_a (cr, get_parent_bg(), 1);
233 cairo_rectangle (cr, 0, 0, w, h);
236 cairo_set_line_width (cr, 2);
237 cairo_set_source_rgba (cr, 0, 0, 0, 1.0);
239 cairo_matrix_t matrix;
240 Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET, w-CORNER_SIZE, h-CORNER_SIZE, CORNER_RADIUS);
241 // we use a 'trick' here: The stoke is off by .5px but filling the interior area
242 // after a stroke of 2px width results in an outline of 1px
243 cairo_stroke_preserve(cr);
245 if (_orien == VERT) {
247 if (ds > h - FADER_RESERVE - CORNER_OFFSET) {
248 ds = h - FADER_RESERVE - CORNER_OFFSET;
251 if (!CairoWidget::flat_buttons() ) {
252 cairo_set_source (cr, _pattern);
253 cairo_matrix_init_translate (&matrix, 0, (h - ds));
254 cairo_pattern_set_matrix (_pattern, &matrix);
256 CairoWidget::set_source_rgb_a (cr, get_style()->get_bg (get_state()), 1);
258 CairoWidget::set_source_rgb_a (cr, get_style()->get_fg (get_state()), 1);
259 Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, ds + CORNER_OFFSET,
260 w - CORNER_SIZE, h - ds - CORNER_SIZE, CORNER_RADIUS);
266 if (ds < FADER_RESERVE) {
272 * if ds == w, the pattern does not need to be translated
273 * if ds == 0 (or FADER_RESERVE), the pattern needs to be moved
274 * w to the left, which is -w in pattern space, and w in user space
275 * if ds == 10, then the pattern needs to be moved w - 10
276 * to the left, which is -(w-10) in pattern space, which
277 * is (w - 10) in user space
278 * thus: translation = (w - ds)
281 if (!CairoWidget::flat_buttons() ) {
282 cairo_set_source (cr, _pattern);
283 cairo_matrix_init_translate (&matrix, w - ds, 0);
284 cairo_pattern_set_matrix (_pattern, &matrix);
286 CairoWidget::set_source_rgb_a (cr, get_style()->get_bg (get_state()), 1);
288 CairoWidget::set_source_rgb_a (cr, get_style()->get_fg (get_state()), 1);
289 Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET,
290 ds - CORNER_SIZE, h - CORNER_SIZE, CORNER_RADIUS);
295 /* draw the unity-position line if it's not at either end*/
296 if (!(_tweaks & NoShowUnityLine) && _unity_loc > CORNER_RADIUS) {
297 context->set_line_width (1);
298 context->set_line_cap (Cairo::LINE_CAP_ROUND);
299 Gdk::Color c = get_style()->get_fg (Gtk::STATE_ACTIVE);
300 context->set_source_rgba (c.get_red_p() * 1.5, c.get_green_p() * 1.5, c.get_blue_p() * 1.5, 0.85);
301 if (_orien == VERT) {
302 if (_unity_loc < h - CORNER_RADIUS) {
303 context->move_to (1.5, _unity_loc + CORNER_OFFSET + .5);
304 context->line_to (_girth - 1.5, _unity_loc + CORNER_OFFSET + .5);
308 if (_unity_loc < w - CORNER_RADIUS) {
309 context->move_to (_unity_loc - CORNER_OFFSET + .5, 1.5);
310 context->line_to (_unity_loc - CORNER_OFFSET + .5, _girth - 1.5);
316 if (_layout && !_text.empty() && _orien == HORIZ) {
318 if (_centered_text) {
320 cairo_move_to (cr, (w - _text_width)/2.0, h/2.0 - _text_height/2.0);
321 } else if (ds > .5 * w) {
322 cairo_move_to (cr, CORNER_OFFSET + 3, h/2.0 - _text_height/2.0);
323 cairo_set_operator(cr, CAIRO_OPERATOR_XOR);
325 cairo_move_to (cr, w - _text_width - CORNER_OFFSET - 3, h/2.0 - _text_height/2.0);
327 CairoWidget::set_source_rgb_a (cr, get_style()->get_text (get_state()), 1);
328 pango_cairo_show_layout (cr, _layout->gobj());
332 if (!get_sensitive()) {
333 Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET, w-CORNER_SIZE, h-CORNER_SIZE, CORNER_RADIUS);
334 cairo_set_source_rgba (cr, 0.505, 0.517, 0.525, 0.4);
336 } else if (_hovering) {
337 Gtkmm2ext::rounded_rectangle (cr, CORNER_OFFSET, CORNER_OFFSET, w-CORNER_SIZE, h-CORNER_SIZE, CORNER_RADIUS);
338 cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.1);
348 PixFader::on_size_request (GtkRequisition* req)
350 if (_orien == VERT) {
351 req->width = (_min_girth ? _min_girth : -1);
352 req->height = (_min_span ? _min_span : -1);
354 req->height = (_min_girth ? _min_girth : -1);
355 req->width = (_min_span ? _min_span : -1);
360 PixFader::on_size_allocate (Gtk::Allocation& alloc)
362 DrawingArea::on_size_allocate(alloc);
364 if (_orien == VERT) {
365 _girth = alloc.get_width ();
366 _span = alloc.get_height ();
368 _girth = alloc.get_height ();
369 _span = alloc.get_width ();
373 /* recreate patterns in case we've changed size */
377 update_unity_position ();
381 PixFader::on_button_press_event (GdkEventButton* ev)
383 if (ev->type != GDK_BUTTON_PRESS) {
387 gdk_pointer_ungrab (GDK_CURRENT_TIME);
390 return (_tweaks & NoButtonForward) ? true : false;
393 if (ev->button != 1 && ev->button != 2) {
399 _grab_loc = (_orien == VERT) ? ev->y : ev->x;
400 _grab_start = (_orien == VERT) ? ev->y : ev->x;
401 _grab_window = ev->window;
403 gdk_pointer_grab(ev->window,false,
404 GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK),
407 if (ev->button == 2) {
408 set_adjustment_from_event (ev);
411 return (_tweaks & NoButtonForward) ? true : false;
415 PixFader::on_button_release_event (GdkEventButton* ev)
417 double ev_pos = (_orien == VERT) ? ev->y : ev->x;
419 switch (ev->button) {
424 gdk_pointer_ungrab (GDK_CURRENT_TIME);
428 Keyboard::magic_widget_drop_focus();
432 if (ev_pos == _grab_start) {
433 /* no motion - just a click */
434 const double slider_pos = display_span();
435 ev_pos = rint(ev_pos);
437 if (ev->state & Keyboard::TertiaryModifier) {
438 _adjustment.set_value (_default_value);
439 } else if (ev->state & Keyboard::GainFineScaleModifier) {
440 _adjustment.set_value (_adjustment.get_lower());
441 } else if (ev_pos == slider_pos) {
442 ; // click on current position, no move.
443 } else if ((_orien == VERT && ev_pos < slider_pos) || (_orien == HORIZ && ev_pos > slider_pos)) {
444 /* above the current display height, remember X Window coords */
445 _adjustment.set_value (_adjustment.get_value() + _adjustment.get_step_increment());
447 _adjustment.set_value (_adjustment.get_value() - _adjustment.get_step_increment());
459 set_adjustment_from_event (ev);
460 gdk_pointer_ungrab (GDK_CURRENT_TIME);
472 PixFader::on_scroll_event (GdkEventScroll* ev)
477 if (ev->state & Keyboard::GainFineScaleModifier) {
478 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
487 if (_orien == VERT) {
488 switch (ev->direction) {
490 _adjustment.set_value (_adjustment.get_value() + (_adjustment.get_page_increment() * scale));
493 case GDK_SCROLL_DOWN:
494 _adjustment.set_value (_adjustment.get_value() - (_adjustment.get_page_increment() * scale));
501 int dir = ev->direction;
503 if (ev->state & Keyboard::ScrollHorizontalModifier || !(_tweaks & NoVerticalScroll)) {
504 if (ev->direction == GDK_SCROLL_UP) dir = GDK_SCROLL_RIGHT;
505 if (ev->direction == GDK_SCROLL_DOWN) dir = GDK_SCROLL_LEFT;
509 case GDK_SCROLL_RIGHT:
510 _adjustment.set_value (_adjustment.get_value() + (_adjustment.get_page_increment() * scale));
513 case GDK_SCROLL_LEFT:
514 _adjustment.set_value (_adjustment.get_value() - (_adjustment.get_page_increment() * scale));
525 PixFader::on_motion_notify_event (GdkEventMotion* ev)
529 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
531 if (ev->window != _grab_window) {
533 _grab_window = ev->window;
537 if (ev->state & Keyboard::GainFineScaleModifier) {
538 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
545 double const delta = ev_pos - _grab_loc;
548 double fract = (delta / _span);
550 fract = min (1.0, fract);
551 fract = max (-1.0, fract);
553 // X Window is top->bottom for 0..Y
555 if (_orien == VERT) {
559 _adjustment.set_value (_adjustment.get_value() + scale * fract * (_adjustment.get_upper() - _adjustment.get_lower()));
566 PixFader::adjustment_changed ()
568 if (display_span() != _last_drawn) {
573 /** @return pixel offset of the current value from the right or bottom of the fader */
575 PixFader::display_span ()
577 float fract = (_adjustment.get_value () - _adjustment.get_lower()) / ((_adjustment.get_upper() - _adjustment.get_lower()));
579 if (_orien == VERT) {
580 ds = (int)rint (_span * (1.0 - fract));
582 ds = (int)rint (_span * fract);
589 PixFader::update_unity_position ()
591 if (_orien == VERT) {
592 _unity_loc = (int) rint (_span * (1 - ((_default_value - _adjustment.get_lower()) / (_adjustment.get_upper() - _adjustment.get_lower())))) - 1;
594 _unity_loc = (int) rint ((_default_value - _adjustment.get_lower()) * _span / (_adjustment.get_upper() - _adjustment.get_lower()));
601 PixFader::on_enter_notify_event (GdkEventCrossing*)
604 Keyboard::magic_widget_grab_focus ();
610 PixFader::on_leave_notify_event (GdkEventCrossing*)
614 Keyboard::magic_widget_drop_focus();
621 PixFader::set_adjustment_from_event (GdkEventButton* ev)
623 double fract = (_orien == VERT) ? (1.0 - (ev->y / _span)) : (ev->x / _span);
625 fract = min (1.0, fract);
626 fract = max (0.0, fract);
628 _adjustment.set_value (fract * (_adjustment.get_upper () - _adjustment.get_lower ()));
632 PixFader::set_default_value (float d)
635 update_unity_position ();
639 PixFader::set_tweaks (Tweaks t)
641 bool need_redraw = false;
642 if ((_tweaks & NoShowUnityLine) ^ (t & NoShowUnityLine)) {
652 PixFader::set_text (const std::string& str, bool centered, bool expose)
654 if (_layout && _text == str) {
657 if (!_layout && !str.empty()) {
658 _layout = Pango::Layout::create (get_pango_context());
662 _centered_text = centered;
664 _layout->set_text (str);
665 _layout->get_pixel_size (_text_width, _text_height);
667 if (expose) queue_draw ();
672 PixFader::on_state_changed (Gtk::StateType old_state)
674 Widget::on_state_changed (old_state);
680 PixFader::on_style_changed (const Glib::RefPtr<Gtk::Style>&)
683 std::string txt = _layout->get_text();
684 _layout.clear (); // drop reference to existing layout
686 set_text (txt, _centered_text, false);
688 /* patterns are cached and re-created as needed
689 * during 'expose' in the GUI thread */
695 PixFader::get_parent_bg ()
697 Widget* parent = get_parent ();
700 if (parent->get_has_window()) {
703 parent = parent->get_parent();
706 if (parent && parent->get_has_window()) {
707 if (_current_parent != parent) {
708 if (_parent_style_change) _parent_style_change.disconnect();
709 _current_parent = parent;
710 _parent_style_change = parent->signal_style_changed().connect (mem_fun (*this, &PixFader::on_style_changed));
712 return parent->get_style ()->get_bg (parent->get_state());
715 return get_style ()->get_bg (get_state());