89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
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/*******************************************************************************/
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/* Copyright (C) 2009 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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/* just like an Fl_Value_Slider, except that it responds to mousewheel events */
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#pragma once
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#include <FL/Fl_Value_Slider.H>
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#include <FL/Fl.H>
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#include <math.h>
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class Fl_Value_SliderX : public Fl_Value_Slider
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{
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public:
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Fl_Value_SliderX ( int X, int Y, int W, int H, const char *L = 0 )
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: Fl_Value_Slider( X, Y, W, H, L )
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{
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}
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virtual ~Fl_Value_SliderX() { }
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virtual int handle ( int m )
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{
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/* Fl_Value_Slider and friends should really handle mousewheel, but they don't in FTLK1 */
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switch ( m )
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{
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case FL_MOUSEWHEEL:
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{
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if ( this != Fl::belowmouse() )
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return 0;
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int steps = 16;
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if ( Fl::event_ctrl() )
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steps = 128;
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float step = fabs( maximum() - minimum() ) / (float)steps;
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float d = ((float)Fl::event_dy()) * step;
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double v = value() + d;
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if ( maximum() > minimum() )
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{
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if ( v < minimum() )
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v = minimum();
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else if ( v > maximum() )
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v = maximum();
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}
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else
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{
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if ( v > minimum() )
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v = minimum();
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else if ( v < maximum() )
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v = maximum();
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}
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value( v );
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do_callback();
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return 1;
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}
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}
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return Fl_Value_Slider::handle( m );
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}
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};
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