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//
// "$Id: Fl_Button.cxx 7774 2010-10-30 16:50:44Z matt $"
//
// Button widget for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2009 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
//
#include <FL/Fl.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Window.H>
// 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);
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();
}
return 1;
case FL_RELEASE:
if (value_ == oldval) {
if (when() & FL_WHEN_NOT_CHANGED) do_callback();
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();
if (wp.deleted()) return 1;
}
}
if (when() & FL_WHEN_RELEASE) do_callback();
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 : /* FALLTHROUGH */
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;
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 && !value_) {
setonly();
if (when() & FL_WHEN_CHANGED) do_callback();
} else if (type() == FL_TOGGLE_BUTTON) {
value(!value());
if (when() & FL_WHEN_CHANGED) do_callback();
}
if (wp.deleted()) return 1;
if (when() & FL_WHEN_RELEASE) do_callback();
return 1;
}
default:
return 0;
}
}
/**
The constructor creates the button using the given position, size and label.
\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);
}
//
// End of "$Id: Fl_Button.cxx 7774 2010-10-30 16:50:44Z matt $".
//
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