add fader implementation from Tracks
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430
libs/gtkmm2ext/fader.cc
Executable file
430
libs/gtkmm2ext/fader.cc
Executable file
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/*
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Copyright (C) 2014 Waves Audio Ltd.
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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/fader.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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#include "pbd/failed_constructor.h"
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#include "pbd/file_utils.h"
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#include "ardour/filesystem_paths.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 CORNER_SIZE 2
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#define CORNER_OFFSET 1
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#define FADER_RESERVE 5
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static void get_closest_point_on_line(double xa, double ya, double xb, double yb, double xp, double yp, double& xl, double& yl )
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{
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// Storing vector A->B
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double a_to_b_x = xb - xa;
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double a_to_b_y = yb - ya;
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// Storing vector A->P
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double a_to_p_x = xp - xa;
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double a_to_p_y = yp - ya;
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// Basically finding the squared magnitude
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// of a_to_b
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double atb2 = a_to_b_x * a_to_b_x + a_to_b_y * a_to_b_y;
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// The dot product of a_to_p and a_to_b
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double atp_dot_atb = a_to_p_x * a_to_b_x + a_to_p_y * a_to_b_y;
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// The normalized "distance" from a to
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// your closest point
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double t = atp_dot_atb / atb2;
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// The vector perpendicular to a_to_b;
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// This step can also be combined with the next
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double perpendicular_x = -a_to_b_y;
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double perpendicular_y = a_to_b_x;
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// Finding Q, the point "in the right direction"
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// If you want a mess, you can also combine this
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// with the next step.
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double xq = xp + perpendicular_x;
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double yq = yp + perpendicular_y;
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// Add the distance to A, moving
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// towards B
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double x = xa + a_to_b_x * t;
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double y = ya + a_to_b_y * t;
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if ((xa != xb)) {
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if ((x < xa) && (x < xb)) {
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if (xa < xb) {
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x = xa;
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y = ya;
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} else {
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x = xb;
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y = yb;
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}
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} else if ((x > xa) && (x > xb)) {
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if (xb > xa) {
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x = xb;
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y = yb;
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} else {
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x = xa;
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y = ya;
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}
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}
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} else {
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if ((y < ya) && (y < yb)) {
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if (ya < yb) {
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x = xa;
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y = ya;
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} else {
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x = xb;
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y = yb;
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}
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} else if ((y > ya) && (y > yb)) {
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if (yb > ya) {
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x = xb;
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y = yb;
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} else {
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x = xa;
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y = ya;
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}
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}
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}
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xl = x;
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yl = y;
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}
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Fader::Fader (Gtk::Adjustment& adj,
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const Glib::RefPtr<Gdk::Pixbuf>& face_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& active_face_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& underlay_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& handle_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& active_handle_pixbuf,
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int min_pos_x,
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int min_pos_y,
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int max_pos_x,
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int max_pos_y,
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bool read_only)
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: adjustment (adj)
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, _face_pixbuf (face_pixbuf)
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, _active_face_pixbuf (active_face_pixbuf)
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, _underlay_pixbuf (underlay_pixbuf)
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, _handle_pixbuf (handle_pixbuf)
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, _active_handle_pixbuf (active_handle_pixbuf)
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, _min_pos_x (min_pos_x)
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, _min_pos_y (min_pos_y)
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, _max_pos_x (max_pos_x)
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, _max_pos_y (max_pos_y)
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, _default_value (adjustment.get_value())
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, _dragging (false)
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, _read_only (read_only)
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, _grab_window (0)
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, _touch_cursor (0)
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{
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update_unity_position ();
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if (!_read_only) {
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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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}
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adjustment.signal_value_changed().connect (mem_fun (*this, &Fader::adjustment_changed));
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adjustment.signal_changed().connect (mem_fun (*this, &Fader::adjustment_changed));
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CairoWidget::set_size_request(_face_pixbuf->get_width(), _face_pixbuf->get_height());
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}
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Fader::~Fader ()
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{
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if (_touch_cursor) {
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delete _touch_cursor;
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}
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}
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void
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Fader::set_touch_cursor (const Glib::RefPtr<Gdk::Pixbuf>& touch_cursor)
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{
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_touch_cursor = new Gdk::Cursor (Gdk::Display::get_default(), touch_cursor, 12, 12);
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}
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void
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Fader::render (cairo_t* cr, cairo_rectangle_t*)
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{
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get_handle_position (_last_drawn_x, _last_drawn_y);
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if (_underlay_pixbuf != 0) {
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cairo_rectangle (cr, 0, 0, get_width(), get_height());
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gdk_cairo_set_source_pixbuf (cr,
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_underlay_pixbuf->gobj(),
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_last_drawn_x - (int)(_underlay_pixbuf->get_width()/2.0 + 0.5),
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_last_drawn_y - (int)(_underlay_pixbuf->get_height()/2.0 + 0.5));
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cairo_fill (cr);
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}
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cairo_rectangle (cr, 0, 0, get_width(), get_height());
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gdk_cairo_set_source_pixbuf (cr,
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((get_state () == Gtk::STATE_ACTIVE) && (_active_face_pixbuf != 0)) ?
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_active_face_pixbuf->gobj() :
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_face_pixbuf->gobj(),
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0,
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0);
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cairo_fill (cr);
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cairo_rectangle (cr, 0, 0, get_width(), get_height());
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if (_dragging) {
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gdk_cairo_set_source_pixbuf (cr,
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_active_handle_pixbuf->gobj(),
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_last_drawn_x - (int)(_active_handle_pixbuf->get_width()/2.0 + 0.5),
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_last_drawn_y - (int)(_active_handle_pixbuf->get_height()/2.0 + 0.5));
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} else {
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gdk_cairo_set_source_pixbuf (cr,
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_handle_pixbuf->gobj(),
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_last_drawn_x - (int)(_handle_pixbuf->get_width()/2.0 + 0.5),
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_last_drawn_y - (int)(_handle_pixbuf->get_height()/2.0 + 0.5));
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}
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cairo_fill (cr);
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}
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void
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Fader::on_size_request (GtkRequisition* req)
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{
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req->width = _face_pixbuf->get_width();
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req->height = _face_pixbuf->get_height();
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}
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void
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Fader::on_size_allocate (Gtk::Allocation& alloc)
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{
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CairoWidget::on_size_allocate(alloc);
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update_unity_position ();
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}
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bool
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Fader::on_button_press_event (GdkEventButton* ev)
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{
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focus_handler();
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if (_read_only) {
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return false;
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}
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if (ev->type != GDK_BUTTON_PRESS) {
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return false;
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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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if (_touch_cursor) {
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get_window()->set_cursor (*_touch_cursor);
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}
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_grab_start_mouse_x = ev->x;
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_grab_start_mouse_y = ev->y;
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get_handle_position (_grab_start_handle_x, _grab_start_handle_y);
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double hw = _handle_pixbuf->get_width();
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double hh = _handle_pixbuf->get_height();
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if ((ev->x < (_grab_start_handle_x - hw/2)) || (ev->x > (_grab_start_handle_x + hw/2)) || (ev->y < (_grab_start_handle_y - hh/2)) || (ev->y > (_grab_start_handle_y + hh/2))) {
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return false;
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}
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double ev_pos_x;
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double ev_pos_y;
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get_closest_point_on_line(_min_pos_x, _min_pos_y,
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_max_pos_x, _max_pos_y,
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ev->x, ev->y,
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ev_pos_x, ev_pos_y );
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add_modal_grab ();
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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,
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NULL,
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ev->time);
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queue_draw();
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return true;
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}
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bool
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Fader::on_button_release_event (GdkEventButton* ev)
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{
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if (_read_only) {
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return false;
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}
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if (_touch_cursor) {
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get_window()->set_cursor ();
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}
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if (_dragging) { //temp
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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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queue_draw ();
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}
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return false;
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}
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bool
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Fader::on_scroll_event (GdkEventScroll* ev)
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{
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if (_read_only) {
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return false;
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}
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int step_factor = 1;
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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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#ifdef __APPLE__
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if ( ev->state & GDK_SHIFT_MASK ) {
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step_factor = -1;
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} else {
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step_factor = 1;
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}
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#else
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step_factor = 1;
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#endif
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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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#ifdef __APPLE__
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if ( ev->state & GDK_SHIFT_MASK ) {
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step_factor = 1;
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} else {
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step_factor = -1;
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}
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#else
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step_factor = -1;
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#endif
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break;
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default:
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return false;
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}
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adjustment.set_value (adjustment.get_value() + step_factor * (adjustment.get_step_increment() ));
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return true;
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}
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bool
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Fader::on_motion_notify_event (GdkEventMotion* ev)
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{
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if (_read_only) {
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return false;
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}
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if (_dragging) {
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double ev_pos_x;
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double ev_pos_y;
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if (ev->window != _grab_window) {
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_grab_window = ev->window;
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return true;
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}
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get_closest_point_on_line(_min_pos_x, _min_pos_y,
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_max_pos_x, _max_pos_y,
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_grab_start_handle_x + (ev->x - _grab_start_mouse_x), _grab_start_handle_y + (ev->y - _grab_start_mouse_y),
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ev_pos_x, ev_pos_y );
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double const fract = sqrt((ev_pos_x - _min_pos_x) * (ev_pos_x - _min_pos_x) +
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(ev_pos_y - _min_pos_y) * (ev_pos_y - _min_pos_y)) /
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sqrt((_max_pos_x - _min_pos_x) * (_max_pos_x - _min_pos_x) +
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(_max_pos_y - _min_pos_y) * (_max_pos_y - _min_pos_y));
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adjustment.set_value (adjustment.get_lower() + (adjustment.get_upper() - adjustment.get_lower()) * fract);
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}
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return true;
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}
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void
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Fader::adjustment_changed ()
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{
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double handle_x;
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double handle_y;
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get_handle_position (handle_x, handle_y);
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if ((handle_x != _last_drawn_x) || (handle_y != _last_drawn_y)) {
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queue_draw ();
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}
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}
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/** @return pixel offset of the current value from the right or bottom of the fader */
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void
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Fader::get_handle_position (double& x, double& y)
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{
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double fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower()));
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x = (int)(_min_pos_x + (_max_pos_x - _min_pos_x) * fract);
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y = (int)(_min_pos_y + (_max_pos_y - _min_pos_y) * fract);
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}
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bool
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Fader::on_enter_notify_event (GdkEventCrossing*)
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{
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_hovering = true;
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Keyboard::magic_widget_grab_focus ();
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queue_draw ();
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return false;
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}
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bool
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Fader::on_leave_notify_event (GdkEventCrossing*)
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{
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if (_read_only) {
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return false;
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}
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if (!_dragging) {
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_hovering = false;
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Keyboard::magic_widget_drop_focus();
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queue_draw ();
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}
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return false;
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}
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void
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Fader::set_default_value (float d)
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{
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_default_value = d;
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update_unity_position ();
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}
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void
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Fader::update_unity_position ()
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{
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}
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111
libs/gtkmm2ext/gtkmm2ext/fader.h
Executable file
111
libs/gtkmm2ext/gtkmm2ext/fader.h
Executable file
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@ -0,0 +1,111 @@
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/*
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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
|
||||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __gtkmm2ext_fader_h__
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#define __gtkmm2ext_fader_h__
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#include <cmath>
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#include <stdint.h>
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#include <gtkmm/adjustment.h>
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#include <gdkmm.h>
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#include <gtkmm2ext/binding_proxy.h>
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#include "gtkmm2ext/cairo_widget.h"
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#include <boost/shared_ptr.hpp>
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#include "gtkmm2ext/visibility.h"
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namespace Gtkmm2ext {
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class LIBGTKMM2EXT_API Fader : public CairoWidget
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{
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public:
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Fader (Gtk::Adjustment& adjustment,
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const Glib::RefPtr<Gdk::Pixbuf>& face_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& active_face_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& underlay_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& handle_pixbuf,
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const Glib::RefPtr<Gdk::Pixbuf>& active_handle_pixbuf,
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int min_pos_x,
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int min_pos_y,
|
||||
int max_pos_x,
|
||||
int max_pos_y,
|
||||
bool read_only);
|
||||
|
||||
virtual ~Fader ();
|
||||
|
||||
void set_controllable (boost::shared_ptr<PBD::Controllable> c) { binding_proxy.set_controllable (c); }
|
||||
void set_default_value (float);
|
||||
void set_touch_cursor (const Glib::RefPtr<Gdk::Pixbuf>& touch_cursor);
|
||||
|
||||
protected:
|
||||
void get_handle_position (double& x, double& y);
|
||||
|
||||
void on_size_request (GtkRequisition*);
|
||||
void on_size_allocate (Gtk::Allocation& alloc);
|
||||
|
||||
void render (cairo_t* cr, cairo_rectangle_t*);
|
||||
bool on_button_press_event (GdkEventButton*);
|
||||
bool on_button_release_event (GdkEventButton*);
|
||||
bool on_motion_notify_event (GdkEventMotion*);
|
||||
bool on_scroll_event (GdkEventScroll* ev);
|
||||
bool on_enter_notify_event (GdkEventCrossing* ev);
|
||||
bool on_leave_notify_event (GdkEventCrossing* ev);
|
||||
|
||||
protected:
|
||||
Gtk::Adjustment& adjustment;
|
||||
BindingProxy binding_proxy;
|
||||
|
||||
private:
|
||||
|
||||
const Glib::RefPtr<Gdk::Pixbuf> _face_pixbuf;
|
||||
const Glib::RefPtr<Gdk::Pixbuf> _active_face_pixbuf;
|
||||
const Glib::RefPtr<Gdk::Pixbuf> _underlay_pixbuf;
|
||||
const Glib::RefPtr<Gdk::Pixbuf> _handle_pixbuf;
|
||||
const Glib::RefPtr<Gdk::Pixbuf> _active_handle_pixbuf;
|
||||
int _min_pos_x;
|
||||
int _min_pos_y;
|
||||
int _max_pos_x;
|
||||
int _max_pos_y;
|
||||
|
||||
bool _hovering;
|
||||
|
||||
GdkWindow* _grab_window;
|
||||
Gdk::Cursor *_touch_cursor;
|
||||
|
||||
double _grab_start_mouse_x;
|
||||
double _grab_start_mouse_y;
|
||||
double _grab_start_handle_x;
|
||||
double _grab_start_handle_y;
|
||||
double _last_drawn_x;
|
||||
double _last_drawn_y;
|
||||
bool _dragging;
|
||||
float _default_value;
|
||||
int _unity_loc;
|
||||
bool _read_only;
|
||||
|
||||
void adjustment_changed ();
|
||||
void update_unity_position ();
|
||||
};
|
||||
|
||||
|
||||
} /* namespace */
|
||||
|
||||
#endif /* __gtkmm2ext_fader_h__ */
|
||||
Loading…
Reference in New Issue
Block a user