The GtkRadiant sources as originally released under the GPL license.

plugins/entity/colour.h

@@ -0,0 +1,102 @@
+/*
+Copyright (C) 2001-2006, William Joseph.
+All Rights Reserved.
+
+This file is part of GtkRadiant.
+
+GtkRadiant is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GtkRadiant 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#if !defined(INCLUDED_COLOUR_H)
+#define INCLUDED_COLOUR_H
+
+#include "ientity.h"
+#include "irender.h"
+
+#include "math/vector.h"
+#include "eclasslib.h"
+#include "generic/callback.h"
+#include "stringio.h"
+
+inline void default_colour(Vector3& colour)
+{
+  colour = Vector3(1, 1, 1);
+}
+inline void read_colour(Vector3& colour, const char* value)
+{
+  if(!string_parse_vector3(value, colour))
+  {
+    default_colour(colour);
+  }
+}
+inline void write_colour(const Vector3& colour, Entity* entity)
+{
+  char value[64];
+
+  sprintf(value, "%f %f %f", colour[0], colour[1], colour[2]);
+  entity->setKeyValue("_color", value);
+}
+
+class Colour
+{
+  Callback m_colourChanged;
+  Shader* m_state;
+
+  void capture_state()
+  {
+    m_state = colour_capture_state_fill(m_colour);
+  }
+  void release_state()
+  {
+    colour_release_state_fill(m_colour);
+  }
+
+public:
+  Vector3 m_colour;
+
+  Colour(const Callback& colourChanged)
+    : m_colourChanged(colourChanged)
+  {
+    default_colour(m_colour);
+    capture_state();
+  }
+  ~Colour()
+  {
+    release_state();
+  }
+
+  void colourChanged(const char* value)
+  {
+    release_state();
+    read_colour(m_colour, value);
+    capture_state();
+
+    m_colourChanged();
+  }
+  typedef MemberCaller1<Colour, const char*, &Colour::colourChanged> ColourChangedCaller;
+
+
+  void write(Entity* entity) const
+  {
+    write_colour(m_colour, entity);
+  }
+
+  Shader* state() const
+  {
+    return m_state;
+  }
+};
+
+#endif