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;
31 int PixFader::fine_scale_modifier = Keyboard::PrimaryModifier;
32 int PixFader::extra_fine_scale_modifier = Keyboard::SecondaryModifier;
34 PixFader::PixFader (Glib::RefPtr<Gdk::Pixbuf> belt, Gtk::Adjustment& adj, int orientation, int fader_length)
43 default_value = adjustment.get_value();
49 if (orientation == VERT) {
50 view.width = girth = pixbuf->get_width();
52 view.height = girth = pixbuf->get_height();
55 set_fader_length (fader_length);
57 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);
59 adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
60 adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
62 if (pixbuf->get_has_alpha()) {
63 format = Cairo::FORMAT_ARGB32;
65 format = Cairo::FORMAT_RGB24;
67 belt_surface = Cairo::ImageSurface::create (format, pixbuf->get_width(), pixbuf->get_height());
68 belt_context = Cairo::Context::create (belt_surface);
69 Gdk::Cairo::set_source_pixbuf (belt_context, pixbuf, 0.0, 0.0);
70 belt_context->paint();
81 PixFader::~PixFader ()
86 PixFader::set_border_colors (uint32_t left, uint32_t right)
89 UINT_TO_RGB(left, &r, &g, &b);
93 UINT_TO_RGB(right, &r, &g, &b);
100 PixFader::on_expose_event (GdkEventExpose* ev)
102 Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
104 int const ds = display_span ();
105 int offset_into_pixbuf = (int) floor (span / ((float) span / ds));
107 /* account for fader lengths that are shorter than the fader pixbuf */
108 if (_orien == VERT) {
109 offset_into_pixbuf += pixbuf->get_height() / 2 - view.height;
111 offset_into_pixbuf += pixbuf->get_width() / 2 - view.width;
114 context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
117 if (_orien == VERT) {
119 srcy = offset_into_pixbuf;
121 srcx = offset_into_pixbuf;
128 context->set_source (belt_surface, -srcx, -srcy);
129 context->rectangle (0, 0, get_width(), get_height());
134 /* bounding box lines (2 colors for nicer visuals) */
136 /* top and left side */
138 context->set_line_width (1);
139 context->set_source_rgb (left_r, left_g, left_b);
140 context->move_to (view.width - 1, 0); /* upper right */
141 context->line_to (0, 0); /* upper left */
142 context->line_to (0, view.height - 1);/* lower left */
145 /* bottom & right side */
147 context->set_line_width (1);
148 context->set_source_rgb (right_r, right_g, right_b);
149 context->move_to (0, view.height - 0.5); /* lower left */
150 context->line_to (view.width - 0.5, view.height - 0.5); /* lower right */
151 context->line_to (view.width - 0.5, 0); /* upper right */
154 /* always draw the unity-position line */
157 if (_orien == VERT) {
158 context->set_line_width (1);
159 context->set_source_rgb (0.0, 1.0, 0.0);
160 context->move_to (1, unity_loc);
161 context->line_to (girth, unity_loc);
164 context->set_line_width (1);
165 context->set_source_rgb (0.0, 1.0, 0.0);
166 context->move_to (unity_loc, 1);
167 context->line_to (unity_loc, girth - 1);
177 PixFader::on_size_request (GtkRequisition* req)
179 req->width = view.width;
180 req->height = view.height;
184 PixFader::on_button_press_event (GdkEventButton* ev)
186 if (ev->type != GDK_BUTTON_PRESS) {
190 if (ev->button != 1 && ev->button != 2) {
195 grab_loc = (_orien == VERT) ? ev->y : ev->x;
196 grab_start = (_orien == VERT) ? ev->y : ev->x;
197 grab_window = ev->window;
200 if (ev->button == 2) {
201 set_adjustment_from_event (ev);
208 PixFader::on_button_release_event (GdkEventButton* ev)
210 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
212 switch (ev->button) {
218 if (ev_pos == grab_start) {
220 /* no motion - just a click */
222 if (ev->state & Keyboard::TertiaryModifier) {
223 adjustment.set_value (default_value);
224 } else if (ev->state & fine_scale_modifier) {
225 adjustment.set_value (adjustment.get_lower());
226 } else if ((_orien == VERT && ev_pos < span - display_span()) || (_orien == HORIZ && ev_pos > span - display_span())) {
227 /* above the current display height, remember X Window coords */
228 adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment());
230 adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment());
241 set_adjustment_from_event (ev);
253 PixFader::on_scroll_event (GdkEventScroll* ev)
258 if (ev->state & fine_scale_modifier) {
259 if (ev->state & extra_fine_scale_modifier) {
268 if (_orien == VERT) {
270 /* should left/right scroll affect vertical faders ? */
272 switch (ev->direction) {
275 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
278 case GDK_SCROLL_DOWN:
279 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
287 /* up/down scrolls should definitely affect horizontal faders
288 because they are so much easier to use
291 switch (ev->direction) {
293 case GDK_SCROLL_RIGHT:
295 adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
298 case GDK_SCROLL_LEFT:
299 case GDK_SCROLL_DOWN:
300 adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
311 PixFader::on_motion_notify_event (GdkEventMotion* ev)
315 double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
317 if (ev->window != grab_window) {
319 grab_window = ev->window;
323 if (ev->state & fine_scale_modifier) {
324 if (ev->state & extra_fine_scale_modifier) {
331 double const delta = ev_pos - grab_loc;
334 double fract = (delta / span);
336 fract = min (1.0, fract);
337 fract = max (-1.0, fract);
339 // X Window is top->bottom for 0..Y
341 if (_orien == VERT) {
345 adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower()));
352 PixFader::adjustment_changed ()
354 if (display_span() != last_drawn) {
359 /** @return pixel offset of the current value from the right or bottom of the fader */
361 PixFader::display_span ()
363 float fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower()));
364 return (_orien != VERT) ? (int)floor (span * (1.0 - fract)) : (int)floor (span * fract);
368 PixFader::set_fader_length (int l)
370 if (_orien == VERT) {
371 view.height = span = l;
373 view.width = span = l;
376 update_unity_position ();
382 PixFader::update_unity_position ()
384 if (_orien == VERT) {
385 unity_loc = (int) rint (view.height * (1 - (default_value / (adjustment.get_upper() - adjustment.get_lower())))) - 1;
387 unity_loc = (int) rint (default_value * view.width);
394 PixFader::on_enter_notify_event (GdkEventCrossing*)
396 Keyboard::magic_widget_grab_focus ();
401 PixFader::on_leave_notify_event (GdkEventCrossing*)
403 Keyboard::magic_widget_drop_focus();
408 PixFader::set_adjustment_from_event (GdkEventButton* ev)
410 double fract = (_orien == VERT) ? (1.0 - (ev->y / span)) : (ev->x / span);
412 fract = min (1.0, fract);
413 fract = max (0.0, fract);
415 adjustment.set_value (fract * (adjustment.get_upper () - adjustment.get_lower ()));
419 PixFader::set_default_value (float d)
422 update_unity_position ();