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"
27 using namespace Gtkmm2ext;
32 Glib::RefPtr<Gdk::Pixbuf> belt,
33 Glib::RefPtr<Gdk::Pixbuf> belt_desensitised,
41 pixbuf[NORMAL] = belt;
42 pixbuf[DESENSITISED] = belt_desensitised;
45 default_value = adjustment.get_value();
51 if (orientation == VERT) {
52 view.width = girth = pixbuf[0]->get_width();
54 view.height = girth = pixbuf[0]->get_height();
57 set_fader_length (fader_length);
59 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);
61 adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
62 adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
64 for (int i = 0; i < STATES; ++i) {
67 if (pixbuf[i]->get_has_alpha()) {
68 format = Cairo::FORMAT_ARGB32;
70 format = Cairo::FORMAT_RGB24;
73 belt_surface[i] = Cairo::ImageSurface::create (format, pixbuf[i]->get_width(), pixbuf[i]->get_height());
74 belt_context[i] = Cairo::Context::create (belt_surface[i]);
75 Gdk::Cairo::set_source_pixbuf (belt_context[i], pixbuf[i], 0.0, 0.0);
76 belt_context[i]->paint();
88 PixFader::~PixFader ()
93 PixFader::set_border_colors (uint32_t left, uint32_t right)
96 UINT_TO_RGB(left, &r, &g, &b);
100 UINT_TO_RGB(right, &r, &g, &b);
107 PixFader::on_expose_event (GdkEventExpose* ev)
109 int const pi = get_sensitive() ? NORMAL : DESENSITISED;
111 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
113 int const ds = display_span ();
114 int offset_into_pixbuf = (int) floor (span / ((float) span / ds));
116 /* account for fader lengths that are shorter than the fader pixbuf */
117 if (_orien == VERT) {
118 offset_into_pixbuf += pixbuf[pi]->get_height() / 2 - view.height;
120 offset_into_pixbuf += pixbuf[pi]->get_width() / 2 - view.width;
123 context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
126 if (_orien == VERT) {
128 srcy = offset_into_pixbuf;
130 srcx = offset_into_pixbuf;
137 context->set_source (belt_surface[pi], -srcx, -srcy);
138 context->rectangle (0, 0, get_width(), get_height());
143 /* bounding box lines (2 colors for nicer visuals) */
145 /* top and left side */
147 context->set_line_width (1);
148 context->set_source_rgb (left_r, left_g, left_b);
149 context->move_to (view.width - 1, 0); /* upper right */
150 context->line_to (0, 0); /* upper left */
151 context->line_to (0, view.height - 1);/* lower left */
154 /* bottom & right side */
156 context->set_line_width (1);
157 context->set_source_rgb (right_r, right_g, right_b);
158 context->move_to (0, view.height - 0.5); /* lower left */
159 context->line_to (view.width - 0.5, view.height - 0.5); /* lower right */
160 context->line_to (view.width - 0.5, 0); /* upper right */
163 /* always draw the unity-position line */
166 if (_orien == VERT) {
167 context->set_line_width (1);
168 context->set_source_rgb (0.0, 1.0, 0.0);
169 context->move_to (1, unity_loc);
170 context->line_to (girth, unity_loc);
173 context->set_line_width (1);
174 context->set_source_rgb (0.0, 1.0, 0.0);
175 context->move_to (unity_loc, 1);
176 context->line_to (unity_loc, girth - 1);
186 PixFader::on_size_request (GtkRequisition* req)
188 req->width = view.width;
189 req->height = view.height;
193 PixFader::on_button_press_event (GdkEventButton* ev)
195 if (ev->type != GDK_BUTTON_PRESS) {
199 if (ev->button != 1 && ev->button != 2) {
204 grab_loc = (_orien == VERT) ? ev->y : ev->x;
205 grab_start = (_orien == VERT) ? ev->y : ev->x;
206 grab_window = ev->window;
209 if (ev->button == 2) {
210 set_adjustment_from_event (ev);
217 PixFader::on_button_release_event (GdkEventButton* ev)
219 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
221 switch (ev->button) {
227 if (ev_pos == grab_start) {
229 /* no motion - just a click */
231 if (ev->state & Keyboard::TertiaryModifier) {
232 adjustment.set_value (default_value);
233 } else if (ev->state & Keyboard::GainFineScaleModifier) {
234 adjustment.set_value (adjustment.get_lower());
235 } else if ((_orien == VERT && ev_pos < span - display_span()) || (_orien == HORIZ && ev_pos > span - display_span())) {
236 /* above the current display height, remember X Window coords */
237 adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment());
239 adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment());
250 set_adjustment_from_event (ev);
262 PixFader::on_scroll_event (GdkEventScroll* ev)
267 if (ev->state & Keyboard::GainFineScaleModifier) {
268 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
277 if (_orien == VERT) {
279 /* should left/right scroll affect vertical faders ? */
281 switch (ev->direction) {
284 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
287 case GDK_SCROLL_DOWN:
288 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
296 /* up/down scrolls should definitely affect horizontal faders
297 because they are so much easier to use
300 switch (ev->direction) {
302 case GDK_SCROLL_RIGHT:
304 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
307 case GDK_SCROLL_LEFT:
308 case GDK_SCROLL_DOWN:
309 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
320 PixFader::on_motion_notify_event (GdkEventMotion* ev)
324 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
326 if (ev->window != grab_window) {
328 grab_window = ev->window;
332 if (ev->state & Keyboard::GainFineScaleModifier) {
333 if (ev->state & Keyboard::GainExtraFineScaleModifier) {
340 double const delta = ev_pos - grab_loc;
343 double fract = (delta / span);
345 fract = min (1.0, fract);
346 fract = max (-1.0, fract);
348 // X Window is top->bottom for 0..Y
350 if (_orien == VERT) {
354 adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower()));
361 PixFader::adjustment_changed ()
363 if (display_span() != last_drawn) {
368 /** @return pixel offset of the current value from the right or bottom of the fader */
370 PixFader::display_span ()
372 float fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower()));
373 return (_orien != VERT) ? (int)floor (span * (1.0 - fract)) : (int)floor (span * fract);
377 PixFader::set_fader_length (int l)
379 if (_orien == VERT) {
380 view.height = span = l;
382 view.width = span = l;
385 update_unity_position ();
391 PixFader::update_unity_position ()
393 if (_orien == VERT) {
394 unity_loc = (int) rint (view.height * (1 - (default_value / (adjustment.get_upper() - adjustment.get_lower())))) - 1;
396 unity_loc = (int) rint (default_value * view.width);
403 PixFader::on_enter_notify_event (GdkEventCrossing*)
405 Keyboard::magic_widget_grab_focus ();
410 PixFader::on_leave_notify_event (GdkEventCrossing*)
412 Keyboard::magic_widget_drop_focus();
417 PixFader::set_adjustment_from_event (GdkEventButton* ev)
419 double fract = (_orien == VERT) ? (1.0 - (ev->y / span)) : (ev->x / span);
421 fract = min (1.0, fract);
422 fract = max (0.0, fract);
424 adjustment.set_value (fract * (adjustment.get_upper () - adjustment.get_lower ()));
428 PixFader::set_default_value (float d)
431 update_unity_position ();