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//
// Value output widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2026 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
// Fltk widget for drag-adjusting a floating point value.
// This is much lighter than Fl_Value_Input because it has no text editor
// If step() is zero then it can be used to display a floating-point value
#include <FL/Fl.H>
#include <FL/Fl_Value_Output.H>
#include <FL/fl_draw.H>
void Fl_Value_Output::draw() {
Fl_Boxtype b = box() ? box() : FL_DOWN_BOX;
int X = x()+Fl::box_dx(b);
int Y = y()+Fl::box_dy(b);
int W = w()-Fl::box_dw(b);
int H = h()-Fl::box_dh(b);
if (damage()&~FL_DAMAGE_CHILD)
draw_box(b, color());
else {
fl_color(color());
fl_rectf(X, Y, W, H);
}
char buf[129];
format(buf);
fl_color(active_r() ? textcolor() : fl_inactive(textcolor()));
fl_font(textfont(), textsize());
fl_draw(buf,X,Y,W,H,FL_ALIGN_LEFT);
}
int Fl_Value_Output::handle(int event) {
if (!step()) return 0;
double v;
int delta;
int mx = Fl::event_x();
static int ix, drag;
switch (event) {
case FL_PUSH:
ix = mx;
drag = Fl::event_button();
handle_push();
return 1;
case FL_DRAG:
delta = Fl::event_x()-ix;
if (delta > 5) delta -= 5;
else if (delta < -5) delta += 5;
else delta = 0;
switch (drag) {
case 3: v = increment(previous_value(),delta*100); break;
case 2: v = increment(previous_value(),delta*10); break;
default:v = increment(previous_value(),delta); break;
}
v = round(v);
handle_drag(soft()?softclamp(v):clamp(v));;
return 1;
case FL_RELEASE:
handle_release();
return 1;
case FL_ENTER :
case FL_LEAVE :
return 1;
default:
return 0;
}
}
/**
Creates a new Fl_Value_Output widget using the given
position, size, and label string. The default boxtype is FL_NO_BOX.
<P> Inherited destructor destroys the Valuator.
*/
Fl_Value_Output::Fl_Value_Output(int X, int Y, int W, int H,const char *l)
: Fl_Valuator(X,Y,W,H,l) {
box(FL_NO_BOX);
align(FL_ALIGN_LEFT);
textfont_ = FL_HELVETICA;
textsize_ = FL_NORMAL_SIZE;
textcolor_ = FL_FOREGROUND_COLOR;
soft_ = 0;
}
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