new-session-manager/FL/Fl_Blinker.H

/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles                                     */
/*                                                                             */
/* 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; see the file COPYING.  If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
/*******************************************************************************/

#include <FL/Fl_Button.H>
#include <FL/Fl.H>

class Fl_Blinker : public Fl_Button
{
    bool _on;
    float _blink_interval;

    static void
    update_cb ( void *v )
        {
            ((Fl_Blinker*)v)->update_cb();
        }

    void
    update_cb ( void )
        {
            Fl::repeat_timeout( _blink_interval, update_cb, this );

            _on = ! _on;

            redraw();
        }

public:

    static const float SLOW = 0.5f;
    static const float MEDIUM = 0.3f;
    static const float FAST = 0.1f;
    static const float DEFAULT = 0.5f;

    Fl_Blinker ( int X, int Y, int W, int H, const char *L )
        : Fl_Button( X, Y, W, H, L )
        {
            _on = false;

            _blink_interval = DEFAULT;

            type( FL_TOGGLE_BUTTON );
        }

    virtual
    ~Fl_Blinker ()
        {
            if ( value() )
                Fl::remove_timeout( update_cb, this );
        }

    void
    interval ( float v )
        {
            _blink_interval = v;
            if ( value() )
            {
                Fl::remove_timeout( update_cb, this );
                Fl::add_timeout( _blink_interval, update_cb, this );
            }
        }

    virtual void value ( float v )
        {
            if ( v )
            {
                Fl::add_timeout( _blink_interval, update_cb, this );
                Fl_Button::value( v );
                redraw();
            }
            else
            {
                Fl_Button::value( v );
                Fl::remove_timeout( update_cb, this );
                redraw();
            }

        }

    virtual float value ( void ) { return Fl_Button::value(); }

    virtual void
    draw ( void )
        {
            draw_box( value() ? box() : down_box(), x(), y(), w(), h(), ( value() != 0 && _on ) ? selection_color() : color() );
            draw_label();
        }
};