Add a VU_Meter widget.
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Jonathan Moore Liles
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3266c385c3
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/*******************************************************************************/
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/* Copyright (C) 2008 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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/* a VU meter, either horizontal or vertical. Color is a gradient
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from color() to selection_color(). box() is used to draw the
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individual 'lights'. division() controls how many 'lights' there
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are. */
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#include "VU_Meter.H"
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#include <FL/Fl.H>
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#include <FL/fl_draw.H>
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VU_Meter::VU_Meter ( int X, int Y, int W, int H, const char *L ) :
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Fl_Widget( X, Y, W, H, L )
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{
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divisions( 32 );
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type( FL_VERTICAL );
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dim( 0.80f );
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color( FL_GREEN );
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selection_color( FL_RED );
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box( FL_ROUNDED_BOX );
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minimum( 0.0f );
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maximum( 1.0f );
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value( 0.4f );
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}
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void
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VU_Meter::draw ( void )
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{
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int v;
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v = (value() / maximum()) * _divisions;
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draw_box( FL_FLAT_BOX, x(), y(), w(), h(), FL_BLACK );
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int bh = h() / _divisions;
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int bw = w() / _divisions;
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int b = 0;
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for ( int p = _divisions; p > 0; p-- )
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{
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Fl_Color c = fl_color_average( selection_color(), color(), (float)p / _divisions );
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if ( ! active_r() )
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c = fl_inactive( c );
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if ( p > v )
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c = fl_color_average( FL_BLACK, c, _dim );
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if ( _type == FL_HORIZONTAL )
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draw_box( box(), x() + (p * bw), y(), bw, h(), c );
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else
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draw_box( box(), x(), y() + h() - (p * bh), w(), bh, c );
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}
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// we don't care about the label
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// draw_label (tx, y() + by, tw, h() - bh);
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}
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@ -0,0 +1,62 @@
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/*******************************************************************************/
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/* Copyright (C) 2008 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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#pragma once
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#include <FL/Fl_Valuator.H> // for FL_HORIZONTAL and FL_VERTICAL
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class VU_Meter : public Fl_Widget
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{
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float _value;
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float _minimum;
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float _maximum;
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int _type;
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int _divisions;
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float _dim;
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protected:
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virtual void draw ( void );
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public:
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VU_Meter ( int X, int Y, int W, int H, const char *L = 0 );
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void maximum( float v ) { _maximum = v; redraw(); }
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float maximum ( void ) const { return _maximum; }
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void minimum ( float v ) { _minimum = v; redraw(); }
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float minimum ( void ) const { return _minimum; }
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void value ( float v ) { _value = v; redraw(); }
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float value ( void ) const { return _value; }
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bool divisions ( void ) const { return _divisions; }
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void divisions ( int v ) { _divisions = v; }
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int type ( void ) const { return _type; }
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void type ( int v ) { _type = v; }
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float dim ( void ) const { return _dim; }
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void dim ( float v ) { _dim = v; redraw(); }
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};
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