84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
//
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// "$Id"
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//
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// Valuator header file for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems to "fltk-bugs@easysw.com".
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//
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#ifndef Fl_Valuator_H
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#define Fl_Valuator_H
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#ifndef Fl_Widget_H
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#include "Fl_Widget.H"
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#endif
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// shared type() values for classes that work in both directions:
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#define FL_VERTICAL 0
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#define FL_HORIZONTAL 1
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class Fl_Valuator : public Fl_Widget {
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double value_;
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double previous_value_;
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double min, max; // truncates to this range *after* rounding
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double A; int B; // rounds to multiples of A/B, or no rounding if A is zero
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protected:
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int horizontal() const {return type()&1;}
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Fl_Valuator(int X, int Y, int W, int H, const char* L);
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double previous_value() const {return previous_value_;}
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void handle_push() {previous_value_ = value_;}
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double softclamp(double);
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void handle_drag(double newvalue);
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void handle_release(); // use drag() value
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virtual void value_damage(); // cause damage() due to value() changing
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public:
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void bounds(double a, double b) {min=a; max=b;}
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double minimum() const {return min;}
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void minimum(double a) {min = a;}
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double maximum() const {return max;}
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void maximum(double a) {max = a;}
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void range(double a, double b) {min = a; max = b;}
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void step(int a) {A = a; B = 1;}
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void step(double a, int b) {A = a; B = b;}
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void step(double s);
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double step() const {return A/B;}
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void precision(int);
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double value() const {return value_;}
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int value(double);
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virtual int format(char*);
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double round(double); // round to nearest multiple of step
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double clamp(double); // keep in range
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double increment(double, int); // add n*step to value
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};
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#endif
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//
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// End of "$Id: Fl_Valuator.H,v 1.2 1998/10/19 21:39:15 mike Exp $".
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//
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