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//
// Spinner widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2017 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
//
/* \file
Fl_Spinner widget . */
#include <stdio.h>
#include <stdlib.h>
#include <FL/Fl_Spinner.H>
/*
This widget is a combination of the input widget and repeat buttons.
The user can either type into the input area or use the buttons to
change the value.
*/
void Fl_Spinner::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_) {
if (sb->wrap_)
v = sb->minimum_;
else
v = sb->maximum_;
}
sb->value_ = v;
sb->update();
} else if (w == &(sb->down_button_)) {
// Down button pressed...
v = sb->value_ - sb->step_;
if (v < sb->minimum_) {
if (sb->wrap_)
v = sb->maximum_;
else
v = sb->minimum_;
}
sb->value_ = v;
sb->update();
}
sb->set_changed();
sb->do_callback();
}
void Fl_Spinner::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);
}
#define FL_UP_ARROW_TX "@-42<"
#define FL_DOWN_ARROW_TX "@-42>"
/**
Creates a new Fl_Spinner widget using the given position, size,
and label string.
The inherited destructor destroys the widget and any value associated with it.
*/
Fl_Spinner::Fl_Spinner(int X, int Y, int W, int H, const char *L)
: 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, FL_UP_ARROW_TX),
down_button_(X + W - H / 2 - 2, Y + H - H / 2,
H / 2 + 2, H / 2, FL_DOWN_ARROW_TX)
{
end();
value_ = 1.0;
minimum_ = 1.0;
maximum_ = 100.0;
step_ = 1.0;
wrap_ = 1;
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);
}
int Fl_Spinner::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;
}
return 0;
case FL_FOCUS:
if (input_.take_focus()) return 1;
return 0;
}
return Fl_Group::handle(event);
}
void Fl_Spinner::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);
}
/**
Sets or returns the amount to change the value when the user clicks a button.
Before setting step to a non-integer value, the spinner
type() should be changed to floating point.
\see double Fl_Spinner::step() const
*/
void Fl_Spinner::step(double s) {
step_ = s;
if (step_ != (int)step_) input_.type(FL_FLOAT_INPUT);
else input_.type(FL_INT_INPUT);
update();
}
/** Sets the numeric representation in the input field.
Valid values are FL_INT_INPUT and FL_FLOAT_INPUT.
Also changes the format() template.
Setting a new spinner type via a superclass pointer will not work.
\note type() is not a virtual function.
*/
void Fl_Spinner::type(uchar v) {
if (v == FL_FLOAT_INPUT) {
format("%.*f");
} else {
format("%.0f");
}
input_.type(v);
}
/**
Handles events of Fl_Spinner's embedded input widget.
Works like Fl_Input::handle() but ignores FL_Up and FL_Down keys
so they can be handled by the parent widget (Fl_Spinner).
*/
int Fl_Spinner::Fl_Spinner_Input::handle(int event) {
if (event == FL_KEYBOARD) {
const int key = Fl::event_key();
if (key == FL_Up || key == FL_Down) {
Fl_Input::handle(FL_UNFOCUS); // sets and potentially clips the input value
return 0;
}
}
return Fl_Input::handle(event);
}
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