livetrax/gtk2_ardour/editor_hscroller.cc

/*
    Copyright (C) 2002 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id$
*/

#include "editor.h"

#include <ardour/session.h>

using namespace std;
using namespace ARDOUR;
using namespace PBD;

void
Editor::hscrollbar_allocate (Gtk::Allocation &alloc)
{
}

bool
Editor::hscrollbar_button_press (GdkEventButton *ev)
{
	edit_hscroll_dragging = true;
	return true;
}

bool
Editor::hscrollbar_button_release (GdkEventButton *ev)
{
	if (session) {
		if (edit_hscroll_dragging) {
			// lets do a tempo redisplay only on button release, because it is dog slow
			tempo_map_changed (Change (0));
			edit_hscroll_dragging = false;
		}
	}

	return true;
}

void
Editor::reset_hscrollbar_stepping ()
{
	horizontal_adjustment.set_step_increment ((current_page_frames() / 5)/frames_per_unit); /* 5 clicks to scroll the entire page */
	horizontal_adjustment.set_page_increment (current_page_frames()/frames_per_unit);
}