98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
|
|
/*******************************************************************************/
|
|
/* 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. */
|
|
/*******************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
#include <FL/Fl.H>
|
|
#include <FL/Fl_Scrollbar.H>
|
|
#include <FL/Fl_Slider.H>
|
|
|
|
#include <stdio.h>
|
|
|
|
class Scalebar : public Fl_Scrollbar
|
|
{
|
|
double _zoom;
|
|
|
|
bool _zoom_changed;
|
|
|
|
double _zoom_min;
|
|
double _zoom_max;
|
|
|
|
public:
|
|
|
|
Scalebar ( int X, int Y, int W, int H ) : Fl_Scrollbar ( X, Y, W, H )
|
|
{
|
|
_zoom = 1.0f;
|
|
_zoom_min = 0;
|
|
_zoom_max = 256;
|
|
_zoom_changed = false;
|
|
|
|
step( 1 );
|
|
}
|
|
|
|
bool zoom_changed ( void ) const { return _zoom_changed; }
|
|
double zoom ( void ) const { return _zoom; }
|
|
void zoom ( double v ) { _zoom = v; }
|
|
double value ( void ) const { return Fl_Slider::value(); }
|
|
void zoom_range ( double zmin, double zmax ) { _zoom_min = zmin; _zoom_max = zmax; }
|
|
|
|
int
|
|
handle ( int m )
|
|
{
|
|
switch ( m )
|
|
{
|
|
case FL_MOUSEWHEEL:
|
|
{
|
|
if ( ! Fl::event_ctrl() )
|
|
return 0;
|
|
|
|
int d = Fl::event_dy();
|
|
|
|
double z = _zoom;
|
|
|
|
if ( d < 0 )
|
|
while ( d++ )
|
|
_zoom /= 2;
|
|
else
|
|
while ( d-- )
|
|
_zoom *= 2;
|
|
|
|
if ( _zoom > _zoom_max )
|
|
_zoom = _zoom_max;
|
|
else
|
|
if ( _zoom < _zoom_min )
|
|
_zoom = _zoom_min;
|
|
|
|
if ( z != _zoom )
|
|
{
|
|
_zoom_changed = true;
|
|
do_callback();
|
|
_zoom_changed = false;
|
|
|
|
slider_size( w() / maximum() );
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
default:
|
|
return Fl_Scrollbar::handle( m );
|
|
}
|
|
}
|
|
};
|