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//
// "$Id$"
//
// Spinner widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2006 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#ifndef Fl_Spinner_H
# define Fl_Spinner_H
//
// Include necessary headers...
//
# include <FL/Enumerations.H>
# include <FL/Fl_Group.H>
# include <FL/Fl_Input.H>
# include <FL/Fl_Repeat_Button.H>
# include <stdio.h>
# include <stdlib.h>
//
// Fl_Spinner widget class...
//
class Fl_Spinner : public Fl_Group
{
double value_; // Current value
double minimum_; // Minimum value
double maximum_; // Maximum value
double step_; // Amount to add/subtract for up/down
const char *format_; // Format string
Fl_Input input_; // Input field for the value
Fl_Repeat_Button
up_button_, // Up button
down_button_; // Down button
static void sb_cb(Fl_Widget *w, Fl_Spinner *sb) {
double v; // New value
if (w == &(sb->input_)) {
// Something changed in the input field...
v = atof(sb->input_.value());
if (v < sb->minimum_) {
sb->value_ = sb->minimum_;
sb->update();
} else if (v > sb->maximum_) {
sb->value_ = sb->maximum_;
sb->update();
} else sb->value_ = v;
} else if (w == &(sb->up_button_)) {
// Up button pressed...
v = sb->value_ + sb->step_;
if (v > sb->maximum_) sb->value_ = sb->minimum_;
else sb->value_ = v;
sb->update();
} else if (w == &(sb->down_button_)) {
// Down button pressed...
v = sb->value_ - sb->step_;
if (v < sb->minimum_) sb->value_ = sb->maximum_;
else sb->value_ = v;
sb->update();
}
sb->do_callback();
}
void update() {
char s[255]; // Value string
if (format_[0]=='%'&&format_[1]=='.'&&format_[2]=='*') { // precision argument
// this code block is a simplified version of
// Fl_Valuator::format() and works well (but looks ugly)
int c = 0;
char temp[64], *sp = temp;
sprintf(temp, "%.12f", step_);
while (*sp) sp++;
sp--;
while (sp>temp && *sp=='0') sp--;
while (sp>temp && (*sp>='0' && *sp<='9')) { sp--; c++; }
sprintf(s, format_, c, value_);
} else {
sprintf(s, format_, value_);
}
input_.value(s);
}
public:
Fl_Spinner(int X, int Y, int W, int H, const char *L = 0)
: Fl_Group(X, Y, W, H, L),
input_(X, Y, W - H / 2 - 2, H),
up_button_(X + W - H / 2 - 2, Y, H / 2 + 2, H / 2, "@-42<"),
down_button_(X + W - H / 2 - 2, Y + H - H / 2,
H / 2 + 2, H / 2, "@-42>") {
end();
value_ = 1.0;
minimum_ = 1.0;
maximum_ = 100.0;
step_ = 1.0;
format_ = "%g";
align(FL_ALIGN_LEFT);
input_.value("1");
input_.type(FL_INT_INPUT);
input_.when(FL_WHEN_ENTER_KEY | FL_WHEN_RELEASE);
input_.callback((Fl_Callback *)sb_cb, this);
up_button_.callback((Fl_Callback *)sb_cb, this);
down_button_.callback((Fl_Callback *)sb_cb, this);
}
const char *format() { return (format_); }
void format(const char *f) { format_ = f; update(); }
int handle(int event) {
switch (event) {
case FL_KEYDOWN :
case FL_SHORTCUT :
if (Fl::event_key() == FL_Up) {
up_button_.do_callback();
return 1;
} else if (Fl::event_key() == FL_Down) {
down_button_.do_callback();
return 1;
} else return 0;
case FL_FOCUS :
if (input_.take_focus()) return 1;
else return 0;
}
return Fl_Group::handle(event);
}
// Speling mistaks retained for source compatibility...
double maxinum() const { return (maximum_); }
double maximum() const { return (maximum_); }
void maximum(double m) { maximum_ = m; }
double mininum() const { return (minimum_); }
double minimum() const { return (minimum_); }
void minimum(double m) { minimum_ = m; }
void range(double a, double b) { minimum_ = a; maximum_ = b; }
void resize(int X, int Y, int W, int H) {
Fl_Group::resize(X,Y,W,H);
input_.resize(X, Y, W - H / 2 - 2, H);
up_button_.resize(X + W - H / 2 - 2, Y, H / 2 + 2, H / 2);
down_button_.resize(X + W - H / 2 - 2, Y + H - H / 2,
H / 2 + 2, H / 2);
}
double step() const { return (step_); }
void step(double s) {
step_ = s;
if (step_ != (int)step_) input_.type(FL_FLOAT_INPUT);
else input_.type(FL_INT_INPUT);
update();
}
Fl_Color textcolor() const {
return (input_.textcolor());
}
void textcolor(Fl_Color c) {
input_.textcolor(c);
}
uchar textfont() const {
return (input_.textfont());
}
void textfont(uchar f) {
input_.textfont(f);
}
uchar textsize() const {
return (input_.textsize());
}
void textsize(uchar s) {
input_.textsize(s);
}
uchar type() const { return (input_.type()); }
void type(uchar v) {
if (v==FL_FLOAT_INPUT) {
format("%.*f");
} else {
format("%.0f");
}
input_.type(v);
}
double value() const { return (value_); }
void value(double v) { value_ = v; update(); }
};
#endif // !Fl_Spinner_H
//
// End of "$Id$".
//
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