git-svn-id: svn://localhost/ardour2/trunk@1171 d708f5d6-7413-0410-9779-e7cbd77b26cf
250 lines
5.8 KiB
C++
250 lines
5.8 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 <gtkmm2ext/pixfader.h>
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using namespace Gtkmm2ext;
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using namespace Gtk;
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using namespace Gdk;
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using namespace std;
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PixFader::PixFader (Glib::RefPtr<Pixbuf> belt, Gtk::Adjustment& adj)
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: adjustment (adj),
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pixbuf (belt)
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{
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dragging = false;
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default_value = adjustment.get_value();
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last_drawn = -1;
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pixheight = pixbuf->get_height();
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view.x = 0;
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view.y = 0;
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view.width = pixbuf->get_width();
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view.height = pixheight / 2;
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unity_y = (int) rint (view.height - (default_value * view.height)) - 1;
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add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_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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bool
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PixFader::on_expose_event (GdkEventExpose* ev)
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{
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GdkRectangle intersection;
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int dh = display_height ();
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int offset_into_pixbuf = (int) floor (view.height / ((float) view.height / dh));
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Glib::RefPtr<Gdk::GC> fg_gc (get_style()->get_fg_gc(get_state()));
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if (gdk_rectangle_intersect (&view, &ev->area, &intersection)) {
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get_window()->draw_pixbuf (fg_gc, pixbuf,
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intersection.x, offset_into_pixbuf + intersection.y,
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intersection.x, intersection.y,
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intersection.width, intersection.height,
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Gdk::RGB_DITHER_NONE, 0, 0);
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get_window()->draw_line (get_style()->get_bg_gc(STATE_ACTIVE), 0, 0, view.width - 1, 0); /* top */
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get_window()->draw_line (get_style()->get_bg_gc(STATE_ACTIVE), 0, 0, 0, view.height - 1); /* left */
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get_window()->draw_line (get_style()->get_bg_gc(STATE_NORMAL), view.width - 1, 0, view.width - 1, view.height - 1); /* right */
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get_window()->draw_line (get_style()->get_bg_gc(STATE_NORMAL), 0, view.height - 1, view.width - 1, view.height - 1); /* bottom */
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}
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/* always draw the line */
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get_window()->draw_line (fg_gc, 1, unity_y, view.width - 2, unity_y);
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last_drawn = dh;
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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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req->width = view.width;
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req->height = view.height;
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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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switch (ev->button) {
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case 1:
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case 2:
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add_modal_grab();
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grab_y = ev->y;
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grab_start = ev->y;
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grab_window = ev->window;
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dragging = true;
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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_button_release_event (GdkEventButton* ev)
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{
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double fract;
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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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if (ev->y == grab_start) {
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/* no motion - just a click */
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if (ev->state & Gdk::SHIFT_MASK) {
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adjustment.set_value (default_value);
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} else if (ev->state & GDK_CONTROL_MASK) {
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adjustment.set_value (adjustment.get_lower());
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} else if (ev->y < view.height - display_height()) {
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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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}
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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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fract = 1.0 - (ev->y / view.height); // inverted X Window coordinates, grrr
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fract = min (1.0, fract);
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fract = max (0.0, fract);
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adjustment.set_value (fract * (adjustment.get_upper() - adjustment.get_lower()));
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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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if (ev->state & GDK_CONTROL_MASK) {
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if (ev->state & GDK_MOD1_MASK) {
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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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} else {
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scale = 0.5;
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}
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switch (ev->direction) {
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case GDK_SCROLL_UP:
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/* wheel up */
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adjustment.set_value (adjustment.get_value() + (adjustment.get_page_increment() * scale));
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break;
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case GDK_SCROLL_DOWN:
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/* wheel down */
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adjustment.set_value (adjustment.get_value() - (adjustment.get_page_increment() * scale));
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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_motion_notify_event (GdkEventMotion* ev)
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{
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if (dragging) {
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double fract;
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double delta;
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double scale;
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if (ev->window != grab_window) {
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grab_y = ev->y;
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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 & GDK_CONTROL_MASK) {
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if (ev->state & GDK_MOD1_MASK) {
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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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} else {
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scale = 1.0;
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}
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delta = ev->y - grab_y;
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grab_y = ev->y;
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fract = (delta / view.height);
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fract = min (1.0, fract);
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fract = max (-1.0, fract);
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// X Window is top->bottom for 0..Y
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fract = -fract;
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adjustment.set_value (adjustment.get_value() + scale * fract * (adjustment.get_upper() - adjustment.get_lower()));
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}
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return true;
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}
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void
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PixFader::adjustment_changed ()
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{
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if (display_height() != last_drawn) {
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queue_draw ();
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}
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}
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int
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PixFader::display_height ()
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{
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float fract = (adjustment.get_upper() - adjustment.get_value ()) / ((adjustment.get_upper() - adjustment.get_lower()));
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return (int) floor (view.height * (1.0 - fract));
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}
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