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 $
23 #include "gtkmm2ext/pixfader.h"
24 #include "gtkmm2ext/keyboard.h"
25 #include "gtkmm2ext/rgb_macros.h"
26 #include "gtkmm2ext/utils.h"
28 using namespace Gtkmm2ext;
32 #define CORNER_RADIUS 4
33 #define FADER_RESERVE (2*CORNER_RADIUS)
35 PixFader::PixFader (Gtk::Adjustment& adj, int orientation, int fader_length, int fader_girth)
39 , _orien (orientation)
46 default_value = adjustment.get_value();
47 update_unity_position ();
49 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);
51 adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
52 adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
55 PixFader::~PixFader ()
61 PixFader::free_patterns ()
64 cairo_pattern_destroy (pattern);
67 if (texture_pattern) {
68 cairo_pattern_destroy (texture_pattern);
74 PixFader::create_patterns ()
78 Gdk::Color c = get_style()->get_fg (get_state());
83 fg = c.get_green_p ();
86 c = get_style()->get_bg (get_state());
89 bg = c.get_green_p ();
92 cairo_surface_t* surface;
94 float radius = CORNER_RADIUS;
96 double w = get_width();
100 surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width(), get_height() * 2.0);
101 tc = cairo_create (surface);
103 /* paint background + border */
105 cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, get_width(), 0);
106 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.8,bg*0.8,bb*0.8, 1.0);
107 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 1.0);
108 cairo_set_source (tc, shade_pattern);
109 cairo_rectangle (tc, 0, 0, get_width(), get_height() * 2.0);
112 cairo_pattern_destroy (shade_pattern);
114 /* paint lower shade */
118 shade_pattern = cairo_pattern_create_linear (0.0, 0.0, w, 0);
119 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
120 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
121 cairo_set_source (tc, shade_pattern);
122 Gtkmm2ext::rounded_top_half_rectangle (tc, 1.0, get_height(), w, get_height(), radius-1.5);
125 cairo_pattern_destroy (shade_pattern);
127 pattern = cairo_pattern_create_for_surface (surface);
131 surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width() * 2.0, get_height());
132 tc = cairo_create (surface);
134 /* paint right shade (background section)*/
136 cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
137 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.8,bg*0.8,bb*0.8, 1.0);
138 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 1.0);
139 cairo_set_source (tc, shade_pattern);
140 cairo_rectangle (tc, 0, 0, get_width() * 2.0, get_height());
143 /* paint left shade (active section/foreground) */
145 shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
146 cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
147 cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
148 cairo_set_source (tc, shade_pattern);
149 Gtkmm2ext::rounded_right_half_rectangle (tc, 0, 1, get_width(), get_height() - 2.0, radius-1.5);
151 cairo_pattern_destroy (shade_pattern);
153 pattern = cairo_pattern_create_for_surface (surface);
157 cairo_surface_destroy (surface);
159 if ( !_text.empty()) {
160 _layout->get_pixel_size (_text_width, _text_height);
166 c = get_style()->get_text (get_state());
168 text_r = c.get_red_p ();
169 text_g = c.get_green_p ();
170 text_b = c.get_blue_p ();
174 PixFader::on_expose_event (GdkEventExpose* ev)
176 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
177 cairo_t* cr = context->cobj();
179 cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
186 int ds = display_span ();
187 float w = get_width();
188 float h = get_height();
190 cairo_matrix_t matrix;
192 if (_orien == VERT) {
194 if (ds > h - FADER_RESERVE) {
195 ds = h - FADER_RESERVE;
198 cairo_set_source (cr, pattern);
199 cairo_matrix_init_translate (&matrix, 0, (h - ds));
200 cairo_pattern_set_matrix (pattern, &matrix);
201 cairo_rectangle (cr, 0, 0, w, h);
206 if (ds < FADER_RESERVE) {
211 if ds == w, the pattern does not need to be translated
212 if ds == 0 (or FADER_RESERVE), the pattern needs to be moved
213 w to the left, which is -w in pattern space, and w in
215 if ds == 10, then the pattern needs to be moved w - 10
216 to the left, which is -(w-10) in pattern space, which
217 is (w - 10) in user space
219 thus: translation = (w - ds)
222 cairo_set_source (cr, pattern);
223 cairo_matrix_init_translate (&matrix, w - ds, 0);
224 cairo_pattern_set_matrix (pattern, &matrix);
225 cairo_rectangle (cr, 0, 0, w, h);
229 /* draw the unity-position line if it's not at either end*/
231 if ( _orien == VERT) {
232 if (unity_loc < h ) {
233 context->set_line_width (1);
234 context->set_source_rgb (0.0, 1.0, 0.0);
235 context->move_to (1, unity_loc);
236 context->line_to (girth - 2.0, unity_loc);
240 if ( unity_loc < w ){
241 context->set_line_width (1);
242 context->set_source_rgb (0.0, 1.0, 0.0);
243 context->move_to (unity_loc, 1);
244 context->line_to (unity_loc, girth - 2.0);
250 if ( !_text.empty() ) {
255 cairo_move_to (cr, (get_width() - _text_width)/2.0, get_height()/2.0 - _text_height/2.0);
257 cairo_set_source_rgba (cr, text_r, text_g, text_b, 0.9);
258 pango_cairo_show_layout (cr, _layout->gobj());
261 // if (Config->get_widget_prelight()) { //pixfader does not have access to config
263 Gtkmm2ext::rounded_rectangle (cr, 0, 0, get_width(), get_height(), 3);
264 cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.1);
275 PixFader::on_size_request (GtkRequisition* req)
277 if (_orien == VERT) {
287 PixFader::on_size_allocate (Gtk::Allocation& alloc)
289 DrawingArea::on_size_allocate(alloc);
291 if (_orien == VERT) {
292 span = alloc.get_height();
293 girth = alloc.get_width ();
295 span = alloc.get_width();
296 girth = alloc.get_height ();
299 update_unity_position ();
308 PixFader::on_button_press_event (GdkEventButton* ev)
310 if (ev->type != GDK_BUTTON_PRESS) {
314 if (ev->button != 1 && ev->button != 2) {
319 grab_loc = (_orien == VERT) ? ev->y : ev->x;
320 grab_start = (_orien == VERT) ? ev->y : ev->x;
321 grab_window = ev->window;
323 gdk_pointer_grab(ev->window,false,
324 GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK),
327 if (ev->button == 2) {
328 set_adjustment_from_event (ev);
335 PixFader::on_button_release_event (GdkEventButton* ev)
337 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
339 switch (ev->button) {
344 gdk_pointer_ungrab (GDK_CURRENT_TIME);
347 Keyboard::magic_widget_drop_focus();
351 if (ev_pos == grab_start) {
353 /* no motion - just a click */
355 if (ev->state & Keyboard::TertiaryModifier) {
356 adjustment.set_value (default_value);
357 } else if (ev->state & Keyboard::GainFineScaleModifier) {
358 adjustment.set_value (adjustment.get_lower());
359 } else if ((_orien == VERT && ev_pos < display_span()) || (_orien == HORIZ && ev_pos > display_span())) {
360 /* above the current display height, remember X Window coords */
361 adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment());
363 adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment());
374 set_adjustment_from_event (ev);
375 gdk_pointer_ungrab (GDK_CURRENT_TIME);
387 PixFader::on_scroll_event (GdkEventScroll* ev)
392 if (ev->state & Keyboard::GainFineScaleModifier) {
393 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
402 if (_orien == VERT) {
404 /* should left/right scroll affect vertical faders ? */
406 switch (ev->direction) {
409 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
412 case GDK_SCROLL_DOWN:
413 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
421 /* up/down scrolls should definitely affect horizontal faders
422 because they are so much easier to use
425 switch (ev->direction) {
427 case GDK_SCROLL_RIGHT:
429 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
432 case GDK_SCROLL_LEFT:
433 case GDK_SCROLL_DOWN:
434 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
445 PixFader::on_motion_notify_event (GdkEventMotion* ev)
449 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
451 if (ev->window != grab_window) {
453 grab_window = ev->window;
457 if (ev->state & Keyboard::GainFineScaleModifier) {
458 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
465 double const delta = ev_pos - grab_loc;
468 double fract = (delta / span);
470 fract = min (1.0, fract);
471 fract = max (-1.0, fract);
473 // X Window is top->bottom for 0..Y
475 if (_orien == VERT) {
479 adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower()));
486 PixFader::adjustment_changed ()
488 if (display_span() != last_drawn) {
493 /** @return pixel offset of the current value from the right or bottom of the fader */
495 PixFader::display_span ()
497 float fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower()));
499 if (_orien == VERT) {
500 ds = (int)floor ( span * (1.0 - fract));
502 ds = (int)floor (span * fract);
509 PixFader::set_fader_length (int l)
512 update_unity_position ();
517 PixFader::update_unity_position ()
519 if (_orien == VERT) {
520 unity_loc = (int) rint (span * (1 - (default_value / (adjustment.get_upper() - adjustment.get_lower())))) - 1;
522 unity_loc = (int) rint (default_value * span);
529 PixFader::on_enter_notify_event (GdkEventCrossing*)
532 Keyboard::magic_widget_grab_focus ();
538 PixFader::on_leave_notify_event (GdkEventCrossing*)
542 Keyboard::magic_widget_drop_focus();
549 PixFader::set_adjustment_from_event (GdkEventButton* ev)
551 double fract = (_orien == VERT) ? (1.0 - (ev->y / span)) : (ev->x / span);
553 fract = min (1.0, fract);
554 fract = max (0.0, fract);
556 adjustment.set_value (fract * (adjustment.get_upper () - adjustment.get_lower ()));
560 PixFader::set_default_value (float d)
563 update_unity_position ();
567 PixFader::set_text (const std::string& str)
571 if (!_layout && !_text.empty()) {
572 _layout = Pango::Layout::create (get_pango_context());
576 _layout->set_text (str);
583 PixFader::on_state_changed (Gtk::StateType old_state)
585 Widget::on_state_changed (old_state);