Include a stripped-down version of FLTK in tree and add a USE_INCLUDED_FLTK option to build against it.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4603 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/fltk/src/Fl_Button.cxx b/common/fltk/src/Fl_Button.cxx
new file mode 100644
index 0000000..7104b44
--- /dev/null
+++ b/common/fltk/src/Fl_Button.cxx
@@ -0,0 +1,218 @@
+//
+// "$Id: Fl_Button.cxx 7903 2010-11-28 21:06:39Z matt $"
+//
+// Button widget for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2010 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>
+
+
+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);
+  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();
+      } else {
+        simulate_key_action();
+      }
+      if (wp.deleted()) return 1;
+      if (when() & FL_WHEN_RELEASE) do_callback();
+      return 1;
+    }
+  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.
+  \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 7903 2010-11-28 21:06:39Z matt $".
+//