6a4628e50a
git-svn-id: svn://localhost/ardour2/branches/3.0@12510 d708f5d6-7413-0410-9779-e7cbd77b26cf
421 lines
10 KiB
C++
421 lines
10 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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#include "gtkmm2ext/keyboard.h"
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#include "gtkmm2ext/rgb_macros.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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PixFader::PixFader (Glib::RefPtr<Gdk::Pixbuf> belt, Gtk::Adjustment& adj, int orientation, int fader_length)
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: adjustment (adj),
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pixbuf (belt),
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_orien(orientation)
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{
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Cairo::Format format;
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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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view.x = 0;
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view.y = 0;
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if (orientation == VERT) {
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view.width = girth = pixbuf->get_width();
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} else {
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view.height = girth = pixbuf->get_height();
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}
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set_fader_length (fader_length);
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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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if (pixbuf->get_has_alpha()) {
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format = Cairo::FORMAT_ARGB32;
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} else {
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format = Cairo::FORMAT_RGB24;
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}
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belt_surface = Cairo::ImageSurface::create (format, pixbuf->get_width(), pixbuf->get_height());
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belt_context = Cairo::Context::create (belt_surface);
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Gdk::Cairo::set_source_pixbuf (belt_context, pixbuf, 0.0, 0.0);
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belt_context->paint();
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left_r = 0;
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left_g = 0;
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left_b = 0;
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right_r = 0;
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right_g = 0;
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right_b = 0;
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}
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PixFader::~PixFader ()
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{
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}
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void
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PixFader::set_border_colors (uint32_t left, uint32_t right)
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{
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int r, g, b;
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UINT_TO_RGB(left, &r, &g, &b);
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left_r = r/255.0;
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left_g = g/255.0;
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left_b = b/255.0;
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UINT_TO_RGB(right, &r, &g, &b);
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right_r = r/255.0;
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right_g = g/255.0;
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right_b = b/255.0;
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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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int srcx, srcy;
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int const ds = display_span ();
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int offset_into_pixbuf = (int) floor (span / ((float) span / ds));
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/* account for fader lengths that are shorter than the fader pixbuf */
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if (_orien == VERT) {
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offset_into_pixbuf += pixbuf->get_height() / 2 - view.height;
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} else {
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offset_into_pixbuf += pixbuf->get_width() / 2 - view.width;
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}
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context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
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context->clip ();
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if (_orien == VERT) {
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srcx = 0;
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srcy = offset_into_pixbuf;
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} else {
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srcx = offset_into_pixbuf;
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srcy = 0;
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}
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/* fader */
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context->save();
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context->set_source (belt_surface, -srcx, -srcy);
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context->rectangle (0, 0, get_width(), get_height());
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context->clip ();
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context->paint();
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context->restore();
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/* bounding box lines (2 colors for nicer visuals) */
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/* top and left side */
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context->set_line_width (1);
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context->set_source_rgb (left_r, left_g, left_b);
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context->move_to (view.width - 1, 0); /* upper right */
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context->line_to (0, 0); /* upper left */
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context->line_to (0, view.height - 1);/* lower left */
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context->stroke ();
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/* bottom & right side */
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context->set_line_width (1);
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context->set_source_rgb (right_r, right_g, right_b);
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context->move_to (0, view.height - 0.5); /* lower left */
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context->line_to (view.width - 0.5, view.height - 0.5); /* lower right */
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context->line_to (view.width - 0.5, 0); /* upper right */
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context->stroke ();
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/* always draw the unity-position line */
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if (_orien == VERT) {
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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, unity_loc);
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context->stroke ();
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} else {
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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 - 1);
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context->stroke ();
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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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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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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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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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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 < span - display_span()) || (_orien == HORIZ && ev_pos > span - 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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}
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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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}
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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);
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// X Window is top->bottom for 0..Y
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if (_orien == VERT) {
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fract = -fract;
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}
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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_span() != last_drawn) {
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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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int
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PixFader::display_span ()
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{
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float fract = (adjustment.get_value () - adjustment.get_lower()) / ((adjustment.get_upper() - adjustment.get_lower()));
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return (_orien != VERT) ? (int)floor (span * (1.0 - fract)) : (int)floor (span * fract);
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}
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void
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PixFader::set_fader_length (int l)
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{
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if (_orien == VERT) {
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view.height = span = l;
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} else {
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view.width = span = l;
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}
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update_unity_position ();
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queue_draw ();
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}
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void
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PixFader::update_unity_position ()
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{
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if (_orien == VERT) {
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unity_loc = (int) rint (view.height * (1 - (default_value / (adjustment.get_upper() - adjustment.get_lower())))) - 1;
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} else {
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unity_loc = (int) rint (default_value * view.width);
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}
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queue_draw ();
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}
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bool
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PixFader::on_enter_notify_event (GdkEventCrossing*)
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{
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Keyboard::magic_widget_grab_focus ();
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return false;
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}
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bool
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PixFader::on_leave_notify_event (GdkEventCrossing*)
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{
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Keyboard::magic_widget_drop_focus();
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return false;
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}
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void
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PixFader::set_adjustment_from_event (GdkEventButton* ev)
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{
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double fract = (_orien == VERT) ? (1.0 - (ev->y / span)) : (ev->x / span);
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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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void
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PixFader::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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