Paul Davis
a97376dd80
git-svn-id: svn://localhost/ardour2/branches/3.0@13994 d708f5d6-7413-0410-9779-e7cbd77b26cf
632 lines
15 KiB
C++
632 lines
15 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: fastmeter.h 570 2006-06-07 21:21:21Z sampo $
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*/
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#include <iostream>
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#include "pbd/stacktrace.h"
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#include "gtkmm2ext/pixfader.h"
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#include "gtkmm2ext/keyboard.h"
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#include "gtkmm2ext/rgb_macros.h"
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#include "gtkmm2ext/utils.h"
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using namespace Gtkmm2ext;
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using namespace Gtk;
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using namespace std;
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#define CORNER_RADIUS 4
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#define FADER_RESERVE (2*CORNER_RADIUS)
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std::list<PixFader::FaderImage*> PixFader::_patterns;
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PixFader::PixFader (Gtk::Adjustment& adj, int orientation, int fader_length, int fader_girth)
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: adjustment (adj)
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, span (fader_length)
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, girth (fader_girth)
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, _orien (orientation)
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, pattern (0)
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, _hovering (false)
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, last_drawn (-1)
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, dragging (false)
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{
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default_value = adjustment.get_value();
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update_unity_position ();
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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);
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adjustment.signal_value_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
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adjustment.signal_changed().connect (mem_fun (*this, &PixFader::adjustment_changed));
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}
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PixFader::~PixFader ()
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{
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}
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cairo_pattern_t*
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PixFader::find_pattern (double afr, double afg, double afb,
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double abr, double abg, double abb,
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int w, int h)
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{
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for (list<FaderImage*>::iterator f = _patterns.begin(); f != _patterns.end(); ++f) {
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if ((*f)->matches (afr, afg, afb, abr, abg, abb, w, h)) {
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return (*f)->pattern;
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}
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}
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return 0;
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}
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void
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PixFader::create_patterns ()
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{
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Gdk::Color c = get_style()->get_fg (get_state());
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float fr, fg, fb;
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float br, bg, bb;
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fr = c.get_red_p ();
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fg = c.get_green_p ();
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fb = c.get_blue_p ();
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c = get_style()->get_bg (get_state());
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br = c.get_red_p ();
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bg = c.get_green_p ();
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bb = c.get_blue_p ();
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if ( !_text.empty()) {
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_layout->get_pixel_size (_text_width, _text_height);
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} else {
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_text_width = 0;
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_text_height = 0;
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}
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c = get_style()->get_text (get_state());
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text_r = c.get_red_p ();
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text_g = c.get_green_p ();
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text_b = c.get_blue_p ();
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cairo_surface_t* surface;
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cairo_t* tc = 0;
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float radius = CORNER_RADIUS;
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double w = get_width();
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if (w <= 1 || get_height() <= 1) {
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return;
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}
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if ((pattern = find_pattern (fr, fg, fb, br, bg, bb, get_width(), get_height())) != 0) {
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/* found it - use it */
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return;
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}
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if (_orien == VERT) {
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surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width(), get_height() * 2.0);
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tc = cairo_create (surface);
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/* paint background + border */
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cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, get_width(), 0);
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cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.8,bg*0.8,bb*0.8, 1.0);
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cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 1.0);
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cairo_set_source (tc, shade_pattern);
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cairo_rectangle (tc, 0, 0, get_width(), get_height() * 2.0);
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cairo_fill (tc);
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cairo_pattern_destroy (shade_pattern);
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/* paint lower shade */
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w -= 2.0;
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shade_pattern = cairo_pattern_create_linear (0.0, 0.0, w, 0);
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cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
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cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
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cairo_set_source (tc, shade_pattern);
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Gtkmm2ext::rounded_top_half_rectangle (tc, 1.0, get_height(), w, get_height(), radius-1.5);
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cairo_fill (tc);
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cairo_pattern_destroy (shade_pattern);
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pattern = cairo_pattern_create_for_surface (surface);
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} else {
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surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, get_width() * 2.0, get_height());
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tc = cairo_create (surface);
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/* paint right shade (background section)*/
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cairo_pattern_t* shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
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cairo_pattern_add_color_stop_rgba (shade_pattern, 0, br*0.8,bg*0.8,bb*0.8, 1.0);
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cairo_pattern_add_color_stop_rgba (shade_pattern, 1, br*0.6,bg*0.6,bb*0.6, 1.0);
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cairo_set_source (tc, shade_pattern);
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cairo_rectangle (tc, 0, 0, get_width() * 2.0, get_height());
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cairo_fill (tc);
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/* paint left shade (active section/foreground) */
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shade_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, get_height());
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cairo_pattern_add_color_stop_rgba (shade_pattern, 0, fr*0.8,fg*0.8,fb*0.8, 1.0);
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cairo_pattern_add_color_stop_rgba (shade_pattern, 1, fr*0.6,fg*0.6,fb*0.6, 1.0);
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cairo_set_source (tc, shade_pattern);
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Gtkmm2ext::rounded_right_half_rectangle (tc, 0, 1, get_width(), get_height() - 2.0, radius-1.5);
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cairo_fill (tc);
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cairo_pattern_destroy (shade_pattern);
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pattern = cairo_pattern_create_for_surface (surface);
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}
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/* cache it for others to use */
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_patterns.push_back (new FaderImage (pattern, fr, fg, fb, br, bg, bb, get_width(), get_height()));
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cairo_destroy (tc);
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cairo_surface_destroy (surface);
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}
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bool
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PixFader::on_expose_event (GdkEventExpose* ev)
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{
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Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
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cairo_t* cr = context->cobj();
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if (!pattern) {
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create_patterns();
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}
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if (!pattern) {
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/* this isn't supposed to be happen, but some wackiness whereby
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the pixfader ends up with a 1xN or Nx1 size allocation
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leads to it. the basic wackiness needs fixing but we
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shouldn't crash. just fill in the expose area with
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our bg color.
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*/
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Gdk::Color c = get_style()->get_bg (get_state());
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float br, bg, bb;
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br = c.get_red_p ();
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bg = c.get_green_p ();
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bb = c.get_blue_p ();
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cairo_set_source_rgb (cr, br, bg, bb);
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cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
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cairo_fill (cr);
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return true;
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}
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cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
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cairo_clip (cr);
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int ds = display_span ();
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float w = get_width();
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float h = get_height();
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cairo_matrix_t matrix;
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if (_orien == VERT) {
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if (ds > h - FADER_RESERVE) {
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ds = h - FADER_RESERVE;
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}
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cairo_set_source (cr, pattern);
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cairo_matrix_init_translate (&matrix, 0, (h - ds));
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cairo_pattern_set_matrix (pattern, &matrix);
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Gtkmm2ext::rounded_rectangle (cr, 0, 0, w, h, CORNER_RADIUS-1.5);
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cairo_fill (cr);
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} else {
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if (ds < FADER_RESERVE) {
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ds = FADER_RESERVE;
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}
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/*
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if ds == w, the pattern does not need to be translated
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if ds == 0 (or FADER_RESERVE), the pattern needs to be moved
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w to the left, which is -w in pattern space, and w in
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user space
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if ds == 10, then the pattern needs to be moved w - 10
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to the left, which is -(w-10) in pattern space, which
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is (w - 10) in user space
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thus: translation = (w - ds)
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*/
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cairo_set_source (cr, pattern);
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cairo_matrix_init_translate (&matrix, w - ds, 0);
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cairo_pattern_set_matrix (pattern, &matrix);
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Gtkmm2ext::rounded_rectangle (cr, 0, 0, w, h, CORNER_RADIUS-1.5);
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cairo_fill (cr);
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}
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/* draw the unity-position line if it's not at either end*/
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if (unity_loc > 0) {
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if ( _orien == VERT) {
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if (unity_loc < h ) {
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context->set_line_width (1);
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context->set_source_rgb (0.0, 1.0, 0.0);
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context->move_to (1, unity_loc);
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context->line_to (girth - 2.0, unity_loc);
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context->stroke ();
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}
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} else {
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if ( unity_loc < w ){
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context->set_line_width (1);
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context->set_source_rgb (0.0, 1.0, 0.0);
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context->move_to (unity_loc, 1);
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context->line_to (unity_loc, girth - 2.0);
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context->stroke ();
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}
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}
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}
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if ( !_text.empty() ) {
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/* center text */
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cairo_new_path (cr);
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cairo_move_to (cr, (get_width() - _text_width)/2.0, get_height()/2.0 - _text_height/2.0);
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cairo_set_source_rgba (cr, text_r, text_g, text_b, 0.9);
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pango_cairo_show_layout (cr, _layout->gobj());
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}
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// if (Config->get_widget_prelight()) { //pixfader does not have access to config
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if (_hovering) {
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Gtkmm2ext::rounded_rectangle (cr, 0, 0, get_width(), get_height(), 3);
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cairo_set_source_rgba (cr, 0.905, 0.917, 0.925, 0.1);
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cairo_fill (cr);
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}
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// }
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last_drawn = ds;
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return true;
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}
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void
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PixFader::on_size_request (GtkRequisition* req)
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{
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if (_orien == VERT) {
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req->width = (girth ? girth : -1);
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req->height = (span ? span : -1);
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} else {
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req->height = (girth ? girth : -1);
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req->width = (span ? span : -1);
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}
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}
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void
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PixFader::on_size_allocate (Gtk::Allocation& alloc)
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{
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DrawingArea::on_size_allocate(alloc);
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if (_orien == VERT) {
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girth = alloc.get_width ();
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span = alloc.get_height ();
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} else {
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girth = alloc.get_height ();
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span = alloc.get_width ();
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}
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if (is_realized()) {
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/* recreate patterns in case we've changed size */
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create_patterns ();
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}
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update_unity_position ();
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}
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bool
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PixFader::on_button_press_event (GdkEventButton* ev)
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{
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if (ev->type != GDK_BUTTON_PRESS) {
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return true;
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}
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if (ev->button != 1 && ev->button != 2) {
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return false;
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}
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add_modal_grab ();
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grab_loc = (_orien == VERT) ? ev->y : ev->x;
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grab_start = (_orien == VERT) ? ev->y : ev->x;
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grab_window = ev->window;
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dragging = true;
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gdk_pointer_grab(ev->window,false,
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GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK),
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NULL,NULL,ev->time);
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if (ev->button == 2) {
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set_adjustment_from_event (ev);
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}
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return true;
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}
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bool
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PixFader::on_button_release_event (GdkEventButton* ev)
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{
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double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
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switch (ev->button) {
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case 1:
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if (dragging) {
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remove_modal_grab();
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dragging = false;
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gdk_pointer_ungrab (GDK_CURRENT_TIME);
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if (!_hovering) {
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Keyboard::magic_widget_drop_focus();
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queue_draw ();
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}
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if (ev_pos == grab_start) {
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/* no motion - just a click */
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if (ev->state & Keyboard::TertiaryModifier) {
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adjustment.set_value (default_value);
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} else if (ev->state & Keyboard::GainFineScaleModifier) {
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adjustment.set_value (adjustment.get_lower());
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} else if ((_orien == VERT && ev_pos < display_span()) || (_orien == HORIZ && ev_pos > display_span())) {
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/* above the current display height, remember X Window coords */
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adjustment.set_value (adjustment.get_value() + adjustment.get_step_increment());
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} else {
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adjustment.set_value (adjustment.get_value() - adjustment.get_step_increment());
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}
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}
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return true;
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}
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break;
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case 2:
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if (dragging) {
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remove_modal_grab();
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dragging = false;
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set_adjustment_from_event (ev);
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gdk_pointer_ungrab (GDK_CURRENT_TIME);
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return true;
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}
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break;
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default:
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break;
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}
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return false;
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}
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bool
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PixFader::on_scroll_event (GdkEventScroll* ev)
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{
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double scale;
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bool ret = false;
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if (ev->state & Keyboard::GainFineScaleModifier) {
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if (ev->state & Keyboard::GainExtraFineScaleModifier) {
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scale = 0.01;
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} else {
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scale = 0.05;
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}
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} else {
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scale = 0.25;
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}
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if (_orien == VERT) {
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/* should left/right scroll affect vertical faders ? */
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switch (ev->direction) {
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case GDK_SCROLL_UP:
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adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
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ret = true;
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break;
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case GDK_SCROLL_DOWN:
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adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
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ret = true;
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break;
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default:
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break;
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}
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} else {
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/* up/down scrolls should definitely affect horizontal faders
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because they are so much easier to use
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*/
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switch (ev->direction) {
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case GDK_SCROLL_RIGHT:
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case GDK_SCROLL_UP:
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adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
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ret = true;
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break;
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case GDK_SCROLL_LEFT:
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case GDK_SCROLL_DOWN:
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adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
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ret = true;
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break;
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default:
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break;
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}
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}
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return ret;
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}
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bool
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PixFader::on_motion_notify_event (GdkEventMotion* ev)
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{
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if (dragging) {
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double scale = 1.0;
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double const ev_pos = (_orien == VERT) ? ev->y : ev->x;
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if (ev->window != grab_window) {
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grab_loc = ev_pos;
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grab_window = ev->window;
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return true;
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}
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if (ev->state & Keyboard::GainFineScaleModifier) {
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if (ev->state & Keyboard::GainExtraFineScaleModifier) {
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scale = 0.05;
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} else {
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scale = 0.1;
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}
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}
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double const delta = ev_pos - grab_loc;
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grab_loc = ev_pos;
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double fract = (delta / span);
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fract = min (1.0, fract);
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fract = max (-1.0, fract);
|
|
|
|
// X Window is top->bottom for 0..Y
|
|
|
|
if (_orien == VERT) {
|
|
fract = -fract;
|
|
}
|
|
|
|
adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower()));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
PixFader::adjustment_changed ()
|
|
{
|
|
if (display_span() != last_drawn) {
|
|
queue_draw ();
|
|
}
|
|
}
|
|
|
|
/** @return pixel offset of the current value from the right or bottom of the fader */
|
|
int
|
|
PixFader::display_span ()
|
|
{
|
|
float fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower()));
|
|
int ds;
|
|
if (_orien == VERT) {
|
|
ds = (int)floor ( span * (1.0 - fract));
|
|
} else {
|
|
ds = (int)floor (span * fract);
|
|
}
|
|
|
|
return ds;
|
|
}
|
|
|
|
void
|
|
PixFader::update_unity_position ()
|
|
{
|
|
if (_orien == VERT) {
|
|
unity_loc = (int) rint (span * (1 - (default_value / (adjustment.get_upper() - adjustment.get_lower())))) - 1;
|
|
} else {
|
|
unity_loc = (int) rint (default_value * span / (adjustment.get_upper() - adjustment.get_lower()));
|
|
}
|
|
|
|
queue_draw ();
|
|
}
|
|
|
|
bool
|
|
PixFader::on_enter_notify_event (GdkEventCrossing*)
|
|
{
|
|
_hovering = true;
|
|
Keyboard::magic_widget_grab_focus ();
|
|
queue_draw ();
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
PixFader::on_leave_notify_event (GdkEventCrossing*)
|
|
{
|
|
if (!dragging) {
|
|
_hovering = false;
|
|
Keyboard::magic_widget_drop_focus();
|
|
queue_draw ();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
PixFader::set_adjustment_from_event (GdkEventButton* ev)
|
|
{
|
|
double fract = (_orien == VERT) ? (1.0 - (ev->y / span)) : (ev->x / span);
|
|
|
|
fract = min (1.0, fract);
|
|
fract = max (0.0, fract);
|
|
|
|
adjustment.set_value (fract * (adjustment.get_upper () - adjustment.get_lower ()));
|
|
}
|
|
|
|
void
|
|
PixFader::set_default_value (float d)
|
|
{
|
|
default_value = d;
|
|
update_unity_position ();
|
|
}
|
|
|
|
void
|
|
PixFader::set_text (const std::string& str)
|
|
{
|
|
_text = str;
|
|
|
|
if (!_layout && !_text.empty()) {
|
|
_layout = Pango::Layout::create (get_pango_context());
|
|
}
|
|
|
|
if (_layout) {
|
|
_layout->set_text (str);
|
|
_layout->get_pixel_size (_text_width, _text_height);
|
|
}
|
|
|
|
queue_resize ();
|
|
}
|
|
|
|
void
|
|
PixFader::on_state_changed (Gtk::StateType old_state)
|
|
{
|
|
Widget::on_state_changed (old_state);
|
|
create_patterns ();
|
|
}
|
|
|
|
void
|
|
PixFader::on_style_changed (const Glib::RefPtr<Gtk::Style>&)
|
|
{
|
|
if (_layout) {
|
|
std::string txt = _layout->get_text();
|
|
_layout.clear (); // drop reference to existing layout
|
|
set_text (txt);
|
|
}
|
|
|
|
/* remember that all patterns are cached and not owned by an individual
|
|
pixfader. we will lazily create a new pattern when needed.
|
|
*/
|
|
|
|
pattern = 0;
|
|
}
|