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//
// "$Id$"
//
// Value input widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 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:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
// FLTK widget for drag-adjusting a floating point value.
// Warning: this works by making a child Fl_Input object, even
// though this object is *not* an Fl_Group. May be a kludge?
#include <FL/Fl.H>
#include <FL/Fl_Value_Input.H>
#include <FL/Fl_Group.H>
#include <stdlib.h>
#include <FL/math.h>
void Fl_Value_Input::input_cb(Fl_Widget*, void* v) {
Fl_Value_Input& t = *(Fl_Value_Input*)v;
double nv;
if ((t.step() - floor(t.step()))>0.0 || t.step() == 0.0) nv = strtod(t.input.value(), 0);
else nv = strtol(t.input.value(), 0, 0);
if (nv != t.value() || t.when() & FL_WHEN_NOT_CHANGED) {
t.set_value(nv);
t.set_changed();
if (t.when()) t.do_callback();
}
}
void Fl_Value_Input::draw() {
if (damage()&~FL_DAMAGE_CHILD) input.clear_damage(FL_DAMAGE_ALL);
input.box(box());
input.color(color(), selection_color());
Fl_Widget *i = &input; i->draw(); // calls protected input.draw()
input.clear_damage();
}
void Fl_Value_Input::resize(int X, int Y, int W, int H) {
Fl_Valuator::resize(X, Y, W, H);
input.resize(X, Y, W, H);
}
void Fl_Value_Input::value_damage() {
char buf[128];
format(buf);
input.value(buf);
input.mark(input.position()); // turn off selection highlight
}
int Fl_Value_Input::handle(int event) {
double v;
int delta;
int mx = Fl::event_x_root();
static int ix, drag;
input.when(when());
switch (event) {
case FL_PUSH:
if (!step()) goto DEFAULT;
ix = mx;
drag = Fl::event_button();
handle_push();
return 1;
case FL_DRAG:
if (!step()) goto DEFAULT;
delta = mx-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:
if (!step()) goto DEFAULT;
if (value() != previous_value() || !Fl::event_is_click())
handle_release();
else {
Fl_Widget_Tracker wp(&input);
input.handle(FL_PUSH);
if (wp.exists())
input.handle(FL_RELEASE);
}
return 1;
case FL_FOCUS:
return input.take_focus();
case FL_SHORTCUT:
return input.handle(event);
default:
DEFAULT:
input.type(((step() - floor(step()))>0.0 || step() == 0.0) ? FL_FLOAT_INPUT : FL_INT_INPUT);
return input.handle(event);
}
}
/**
Creates a new Fl_Value_Input widget using the given
position, size, and label string. The default boxtype is
FL_DOWN_BOX.
*/
Fl_Value_Input::Fl_Value_Input(int X, int Y, int W, int H, const char* l)
: Fl_Valuator(X, Y, W, H, l), input(X, Y, W, H, 0) {
soft_ = 0;
if (input.parent()) // defeat automatic-add
input.parent()->remove(input);
input.parent((Fl_Group *)this); // kludge!
input.callback(input_cb, this);
input.when(FL_WHEN_CHANGED);
box(input.box());
color(input.color());
selection_color(input.selection_color());
align(FL_ALIGN_LEFT);
value_damage();
set_flag(SHORTCUT_LABEL);
}
Fl_Value_Input::~Fl_Value_Input() {
if (input.parent() == (Fl_Group *)this)
input.parent(0); // *revert* ctor kludge!
}
//
// End of "$Id$".
//
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