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//
// Button widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2014 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
//
#include <FL/Fl.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Radio_Button.H>
#include <FL/Fl_Toggle_Button.H>
Fl_Widget_Tracker *Fl_Button::key_release_tracker = 0;
// There are a lot of subclasses, named Fl_*_Button. Some of
// them are implemented by setting the type() value and testing it
// here. This includes Fl_Radio_Button and Fl_Toggle_Button
/**
Sets the current value of the button.
A non-zero value sets the button to 1 (ON), and zero sets it to 0 (OFF).
\param[in] v button value.
\see set(), clear()
*/
int Fl_Button::value(int v) {
v = v ? 1 : 0;
oldval = v;
clear_changed();
if (value_ != v) {
value_ = v;
if (box()) redraw();
else redraw_label();
return 1;
} else {
return 0;
}
}
/**
Turns on this button and turns off all other radio buttons in the group
(calling \c value(1) or \c set() does not do this).
*/
void Fl_Button::setonly() { // set this radio button on, turn others off
value(1);
Fl_Group* g = parent();
Fl_Widget*const* a = g->array();
for (int i = g->children(); i--;) {
Fl_Widget* o = *a++;
if (o != this && o->type()==FL_RADIO_BUTTON) ((Fl_Button*)o)->value(0);
}
}
void Fl_Button::draw() {
if (type() == FL_HIDDEN_BUTTON) return;
Fl_Color col = value() ? selection_color() : color();
draw_box(value() ? (down_box()?down_box():fl_down(box())) : box(), col);
draw_backdrop();
if (labeltype() == FL_NORMAL_LABEL && value()) {
Fl_Color c = labelcolor();
labelcolor(fl_contrast(c, col));
draw_label();
labelcolor(c);
} else draw_label();
if (Fl::focus() == this) draw_focus();
}
int Fl_Button::handle(int event) {
int newval;
switch (event) {
case FL_ENTER: /* FALLTHROUGH */
case FL_LEAVE:
// if ((value_?selection_color():color())==FL_GRAY) redraw();
return 1;
case FL_PUSH:
if (Fl::visible_focus() && handle(FL_FOCUS)) Fl::focus(this);
/* FALLTHROUGH */
case FL_DRAG:
if (Fl::event_inside(this)) {
if (type() == FL_RADIO_BUTTON) newval = 1;
else newval = !oldval;
} else {
clear_changed();
newval = oldval;
}
if (newval != value_) {
value_ = newval;
set_changed();
redraw();
if (when() & FL_WHEN_CHANGED) do_callback(FL_REASON_CHANGED);
}
return 1;
case FL_RELEASE:
if (value_ == oldval) {
if (when() & FL_WHEN_NOT_CHANGED) do_callback(FL_REASON_SELECTED);
return 1;
}
set_changed();
if (type() == FL_RADIO_BUTTON) setonly();
else if (type() == FL_TOGGLE_BUTTON) oldval = value_;
else {
value(oldval);
set_changed();
if (when() & FL_WHEN_CHANGED) {
Fl_Widget_Tracker wp(this);
do_callback(FL_REASON_CHANGED);
if (wp.deleted()) return 1;
}
}
if (when() & FL_WHEN_RELEASE) do_callback(FL_REASON_RELEASED);
return 1;
case FL_SHORTCUT:
if (!(shortcut() ?
Fl::test_shortcut(shortcut()) : test_shortcut())) return 0;
if (Fl::visible_focus() && handle(FL_FOCUS)) Fl::focus(this);
goto triggered_by_keyboard;
case FL_FOCUS :
case FL_UNFOCUS :
if (Fl::visible_focus()) {
if (box() == FL_NO_BOX) {
// Widgets with the FL_NO_BOX boxtype need a parent to
// redraw, since it is responsible for redrawing the
// background...
int X = x() > 0 ? x() - 1 : 0;
int Y = y() > 0 ? y() - 1 : 0;
if (window()) window()->damage(FL_DAMAGE_ALL, X, Y, w() + 2, h() + 2);
} else redraw();
return 1;
} else return 0;
/* NOTREACHED */
case FL_KEYBOARD :
if (Fl::focus() == this && Fl::event_key() == ' ' &&
!(Fl::event_state() & (FL_SHIFT | FL_CTRL | FL_ALT | FL_META))) {
set_changed();
triggered_by_keyboard:
Fl_Widget_Tracker wp(this);
if (type() == FL_RADIO_BUTTON) {
if (!value_) {
setonly();
if (when() & FL_WHEN_CHANGED) do_callback(FL_REASON_CHANGED);
}
} else if (type() == FL_TOGGLE_BUTTON) {
value(!value());
if (when() & FL_WHEN_CHANGED) do_callback(FL_REASON_CHANGED);
} else {
simulate_key_action();
}
if (wp.deleted()) return 1;
if (when() & FL_WHEN_RELEASE) do_callback(FL_REASON_RELEASED);
return 1;
}
/* FALLTHROUGH */
default:
return 0;
}
}
void Fl_Button::simulate_key_action()
{
if (key_release_tracker) {
Fl::remove_timeout(key_release_timeout, key_release_tracker);
key_release_timeout(key_release_tracker);
}
value(1);
redraw();
key_release_tracker = new Fl_Widget_Tracker(this);
Fl::add_timeout(0.15, key_release_timeout, key_release_tracker);
}
void Fl_Button::key_release_timeout(void *d)
{
Fl_Widget_Tracker *wt = (Fl_Widget_Tracker*)d;
if (!wt)
return;
if (wt==key_release_tracker)
key_release_tracker = 0L;
Fl_Button *btn = (Fl_Button*)wt->widget();
if (btn) {
btn->value(0);
btn->redraw();
}
delete wt;
}
/**
The constructor creates the button using the given position, size, and label.
The default box type is box(FL_UP_BOX).
You can control how the button is drawn when ON by setting down_box().
The default is FL_NO_BOX (0) which will select an appropriate box type
using the normal (OFF) box type by using fl_down(box()).
Derived classes may handle this differently.
A button may reequest callbacks with \p whne() \p FL_WHEN_CHANGED,
\p FL_WHEN_NOT_CHANGED, and \p FL_WHEN_RELEASE, triggering the callback
reasons \p FL_REASON_CHANGED, \p FL_REASON_SELECTED,
and \p FL_REASON_DESELECTED.
\param[in] X, Y, W, H position and size of the widget
\param[in] L widget label, default is no label
*/
Fl_Button::Fl_Button(int X, int Y, int W, int H, const char *L)
: Fl_Widget(X,Y,W,H,L) {
box(FL_UP_BOX);
down_box(FL_NO_BOX);
value_ = oldval = 0;
shortcut_ = 0;
set_flag(SHORTCUT_LABEL);
}
/**
The constructor creates the button using the given position, size, and label.
The Button type() is set to FL_RADIO_BUTTON.
\param[in] X, Y, W, H position and size of the widget
\param[in] L widget label, default is no label
*/
Fl_Radio_Button::Fl_Radio_Button(int X,int Y,int W,int H,const char *L)
: Fl_Button(X, Y, W, H, L) {
type(FL_RADIO_BUTTON);
}
/**
The constructor creates the button using the given position, size, and label.
The Button type() is set to FL_TOGGLE_BUTTON.
\param[in] X, Y, W, H position and size of the widget
\param[in] L widget label, default is no label
*/
Fl_Toggle_Button::Fl_Toggle_Button(int X,int Y,int W,int H,const char *L)
: Fl_Button(X,Y,W,H,L)
{
type(FL_TOGGLE_BUTTON);
}
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