The GtkRadiant sources as originally released under the GPL license.

libs/selectionlib.h

@@ -0,0 +1,207 @@
+/*
+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_SELECTIONLIB_H)
+#define INCLUDED_SELECTIONLIB_H
+
+#include "iselection.h"
+#include "generic/callback.h"
+#include "scenelib.h"
+#include <stdlib.h>
+
+class SelectableBool : public Selectable
+{
+  bool m_selected;
+public:
+  SelectableBool()
+    : m_selected(false)
+  {}
+
+  void setSelected(bool select = true)
+  {
+    m_selected = select;
+  }
+  bool isSelected() const
+  {
+    return m_selected;
+  }
+};
+
+class ObservedSelectable : public Selectable
+{
+  SelectionChangeCallback m_onchanged;
+  bool m_selected;
+public:
+  ObservedSelectable(const SelectionChangeCallback& onchanged) : m_onchanged(onchanged), m_selected(false)
+  {
+  }
+  ObservedSelectable(const ObservedSelectable& other) : Selectable(other), m_onchanged(other.m_onchanged), m_selected(false)
+  {
+    setSelected(other.isSelected());
+  }
+  ObservedSelectable& operator=(const ObservedSelectable& other)
+  {
+    setSelected(other.isSelected());
+    return *this;
+  }
+  ~ObservedSelectable()
+  {
+    setSelected(false);
+  }
+
+  void setSelected(bool select)
+  {
+    if(select ^ m_selected)
+    {
+      m_selected = select;
+
+      m_onchanged(*this);
+    }
+  }
+  bool isSelected() const
+  {
+    return m_selected;
+  }
+};
+
+class SelectableInstance : public scene::Instance
+{
+  class TypeCasts
+  {
+    InstanceTypeCastTable m_casts;
+  public:
+    TypeCasts()
+    {
+      InstanceContainedCast<SelectableInstance, Selectable>::install(m_casts);
+    }
+    InstanceTypeCastTable& get()
+    {
+      return m_casts;
+    }
+  };
+
+  ObservedSelectable m_selectable;
+public:
+
+  typedef LazyStatic<TypeCasts> StaticTypeCasts;
+
+  SelectableInstance(const scene::Path& path, scene::Instance* parent, void* instance = 0, InstanceTypeCastTable& casts = StaticTypeCasts::instance().get()) :
+  Instance(path, parent, instance != 0 ? instance : this, casts),
+    m_selectable(SelectedChangedCaller(*this))
+  {
+  }
+
+  Selectable& get(NullType<Selectable>)
+  {
+    return m_selectable;
+  }
+
+  Selectable& getSelectable()
+  {
+    return m_selectable;
+  }
+  const Selectable& getSelectable() const
+  {
+    return m_selectable;
+  }
+
+  void selectedChanged(const Selectable& selectable)
+  {
+    GlobalSelectionSystem().getObserver(SelectionSystem::ePrimitive)(selectable);
+    GlobalSelectionSystem().onSelectedChanged(*this, selectable);
+
+    Instance::selectedChanged();
+  }
+  typedef MemberCaller1<SelectableInstance, const Selectable&, &SelectableInstance::selectedChanged> SelectedChangedCaller;
+};
+
+
+template<typename Iterator>
+inline bool range_check(Iterator start, Iterator finish, Iterator iter)
+{
+  for(;start != finish; ++start)
+  {
+    if(start == iter)
+    {
+      return true;
+    }
+  }
+  return false;
+}
+
+#include <list>
+
+template<typename Selected>
+class SelectionList
+{
+  typedef std::list<Selected*> List;
+  List m_selection;
+public:
+  typedef typename List::iterator iterator;
+  typedef typename List::const_iterator const_iterator;
+
+  iterator begin()
+  {
+    return m_selection.begin();
+  }
+  const_iterator begin() const
+  {
+    return m_selection.begin();
+  }
+  iterator end()
+  {
+    return m_selection.end();
+  }
+  const_iterator end() const
+  {
+    return m_selection.end();
+  }
+  bool empty() const
+  {
+    return m_selection.empty();
+  }
+  std::size_t size() const
+  {
+    return m_selection.size();
+  }
+  Selected& back()
+  {
+    return *m_selection.back();
+  }
+  Selected& back() const
+  {
+    return *m_selection.back();
+  }
+  void append(Selected& selected)
+  {
+    m_selection.push_back(&selected);
+  }
+  void erase(Selected& selected)
+  {
+    typename List::reverse_iterator i = std::find(m_selection.rbegin(), m_selection.rend(), &selected);
+    ASSERT_MESSAGE(i != m_selection.rend(), "selection-tracking error");
+    ASSERT_MESSAGE(range_check(m_selection.begin(), m_selection.end(), --i.base()), "selection-tracking error");
+    m_selection.erase(--i.base());
+  }
+};
+
+
+#endif