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>
25 using namespace Gtkmm2ext;
31 int PixFader::fine_scale_modifier = GDK_META_MASK;
33 int PixFader::fine_scale_modifier = GDK_CONTROL_MASK;
36 int PixFader::extra_fine_scale_modifier = GDK_MOD1_MASK;
38 PixFader::PixFader (Glib::RefPtr<Pixbuf> belt, Gtk::Adjustment& adj, int orientation)
45 default_value = adjustment.get_value();
51 if (orientation == VERT) {
52 view.width = girth = pixbuf->get_width();
53 view.height = span = pixbuf->get_height() / 2;
54 unity_loc = (int) rint (view.height - (default_value * view.height)) - 1;
56 view.width = span = pixbuf->get_width () / 2;
57 view.height = girth = pixbuf->get_height();
58 unity_loc = (int) rint (default_value * view.width) - 1;
61 add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
63 adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
64 adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
67 PixFader::~PixFader ()
72 PixFader::on_expose_event (GdkEventExpose* ev)
74 GdkRectangle intersection;
75 int srcx, srcy, ds = display_span ();
76 int offset_into_pixbuf = (int) floor (span / ((float) span / ds));
77 Glib::RefPtr<Gdk::GC> fg_gc (get_style()->get_fg_gc(get_state()));
79 if (gdk_rectangle_intersect (&view, &ev->area, &intersection)) {
81 srcx = intersection.x;
82 srcy = offset_into_pixbuf + intersection.y;
84 srcx = offset_into_pixbuf + intersection.x;
85 srcy = intersection.y;
87 get_window()->draw_pixbuf (fg_gc, pixbuf,
89 intersection.x, intersection.y,
90 intersection.width, intersection.height,
91 Gdk::RGB_DITHER_NONE, 0, 0);
93 get_window()->draw_line (get_style()->get_bg_gc(STATE_ACTIVE), 0, 0, view.width - 1, 0); /* top */
94 get_window()->draw_line (get_style()->get_bg_gc(STATE_ACTIVE), 0, 0, 0, view.height - 1); /* left */
95 get_window()->draw_line (get_style()->get_bg_gc(STATE_NORMAL), view.width - 1, 0, view.width - 1, view.height - 1); /* right */
96 get_window()->draw_line (get_style()->get_bg_gc(STATE_NORMAL), 0, view.height - 1, view.width - 1, view.height - 1); /* bottom */
99 /* always draw the line */
100 if (_orien == VERT) {
101 get_window()->draw_line (fg_gc, 1, unity_loc, girth - 2, unity_loc);
103 get_window()->draw_line (fg_gc, unity_loc, 1, unity_loc, girth - 2);
110 PixFader::on_size_request (GtkRequisition* req)
112 req->width = view.width;
113 req->height = view.height;
117 PixFader::on_button_press_event (GdkEventButton* ev)
119 switch (ev->button) {
123 grab_loc = (_orien == VERT) ? ev->y : ev->x;
124 grab_start = (_orien == VERT) ? ev->y : ev->x;
125 grab_window = ev->window;
137 PixFader::on_button_release_event (GdkEventButton* ev)
139 double fract, ev_pos;
141 ev_pos = (_orien == VERT) ? ev->y : ev->x;
143 switch (ev->button) {
149 if (ev_pos == grab_start) {
151 /* no motion - just a click */
153 if (ev->state & Gdk::SHIFT_MASK) {
155 adjustment.set_value (default_value);
156 cerr << "SV A OUT\n";
157 } else if (ev->state & fine_scale_modifier) {
159 adjustment.set_value (adjustment.get_lower());
160 cerr << "SV B OUT\n";
161 } else if ((_orien == VERT && ev_pos < span - display_span()) || (_orien == HORIZ && ev_pos > span - display_span())) {
162 /* above the current display height, remember X Window coords */
164 adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment());
165 cerr << "SV C OUT\n";
168 adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment());
169 cerr << "SV D OUT\n";
181 fract = 1.0 - (ev_pos / span); // inverted X Window coordinates, grrr
183 fract = min (1.0, fract);
184 fract = max (0.0, fract);
186 adjustment.set_value (fract * (adjustment.get_upper() - adjustment.get_lower()));
198 PixFader::on_scroll_event (GdkEventScroll* ev)
203 if (ev->state & fine_scale_modifier) {
204 if (ev->state & extra_fine_scale_modifier) {
213 if (_orien == VERT) {
215 /* should left/right scroll affect vertical faders ? */
217 switch (ev->direction) {
221 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
224 case GDK_SCROLL_DOWN:
226 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
234 /* up/down scrolls should definitely affect horizontal faders
235 because they are so much easier to use
238 switch (ev->direction) {
240 case GDK_SCROLL_RIGHT:
243 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
246 case GDK_SCROLL_LEFT:
247 case GDK_SCROLL_DOWN:
249 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
260 PixFader::on_motion_notify_event (GdkEventMotion* ev)
263 double fract, delta, scale, ev_pos;
264 ev_pos = (_orien == VERT) ? ev->y : ev->x;
265 //cerr << "PixFader::on_motion_notify_event() called x:y = " << ev->x << ":" << ev->y;
266 if (ev->window != grab_window) {
268 grab_window = ev->window;
272 if (ev->state & fine_scale_modifier) {
273 if (ev->state & extra_fine_scale_modifier) {
281 //cerr << " ev_pos=" << ev_pos << " grab_loc=" << grab_loc;
282 delta = ev_pos - grab_loc;
285 fract = (delta / span);
287 fract = min (1.0, fract);
288 fract = max (-1.0, fract);
290 // X Window is top->bottom for 0..Y
292 if (_orien == VERT) {
296 adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower()));
297 //cerr << " adj=" << adjustment.get_value() << " fract=" << fract << " delta=" << delta << " scale=" << scale << endl;
304 PixFader::adjustment_changed ()
306 if (display_span() != last_drawn) {
312 PixFader::display_span ()
314 float fract = (adjustment.get_upper() - adjustment.get_value ()) / ((adjustment.get_upper() - adjustment.get_lower()));
315 return (_orien == VERT) ? (int)floor (span * (1.0 - fract)) : (int)floor (span * fract);