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+/***************************************************************************
+ * Copyright (C) 2004 by Alexander Dymo *
+ * *
+ * This program 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 program 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 Library General Public *
+ * License along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+#ifndef PROPERTYLIST_H
+#define PROPERTYLIST_H
+
+#include <qobject.h>
+#include <qmap.h>
+#include <qptrlist.h>
+#include <qvaluelist.h>
+#include <qpair.h>
+
+namespace PropertyLib{
+
+class Property;
+class MultiProperty;
+
+/** @file propertylist.h
+@short Contains @ref PropertyLib::PropertyList class.
+*/
+
+/**
+@short The list of properties.
+
+Every object in a program should operate with properties through
+this list in order to:
+- be informed about property changes
+- allow property lists intersections
+- display properties in the property editor widget (see @ref PropertyLib::PropertyEditor).
+.
+
+PropertyList owns properties and deletes them itself. For a list that does not own
+it's properties, look at @ref PropertyLib::PropertyBuffer class.
+
+PropertyList is also capable of grouping properties.
+You can have unsorted list of groups of properties or a plain
+alphabetically sorted list of properties or both at the same time.
+*/
+class PropertyList: public QObject
+{
+ Q_OBJECT
+
+public:
+ class Iterator {
+ public:
+ void operator ++();
+ void operator ++(int);
+
+ MultiProperty *operator *();
+
+ bool operator != (Iterator it);
+
+ QString key();
+ MultiProperty *data();
+
+ private:
+ Iterator(PropertyList *list);
+ Iterator(PropertyList *list, bool end);
+
+ void next();
+ QMap<QString, MultiProperty*>::iterator current;
+
+ PropertyList *m_list;
+ friend class PropertyList;
+ };
+
+ typedef Iterator iterator;
+
+ PropertyList();
+ virtual ~PropertyList();
+
+ /**Accesses a property by it's name. All property modifications are allowed
+ trough this method. For example, to set a value of a property, use:
+ /code
+ PropertyList list;
+ ...
+ list["My Property"]->setValue("My Value");
+ /endcode
+ @return @ref MultiProperty with given name.*/
+ virtual MultiProperty *operator[](const QString &name);
+ /**Accesses a property by it's name. All property modifications are allowed
+ trough this method. For example, to set a value of a property
+ */
+ MultiProperty *property( const QString &name );
+
+ /**Adds the property to the list to the "common" group.*/
+ virtual void addProperty(Property *property);
+ /**Adds the property to the list in group.*/
+ virtual void addProperty(const QString &group, Property *property);
+ /**Removes property from the list. Emits aboutToDeleteProperty before removing.*/
+ virtual void removeProperty(Property *property);
+ /**Removes property with the given name from the list.
+ Emits @ref aboutToDeleteProperty before removing.*/
+ virtual void removeProperty(const QString &name);
+
+ /**@return the list of grouped properties.*/
+ virtual const QValueList<QPair<QString, QValueList<QString> > >& propertiesOfGroup() const;
+ /**@return the map: property - group name.*/
+ virtual const QMap<MultiProperty*, QString>& groupOfProperty() const;
+
+ /**Clears the list of properties.*/
+ virtual void clear();
+ /**Returns true if the list of properties contains property with given name.*/
+ virtual bool contains(const QString &name);
+
+ /**The list of properties with given name.*/
+ QPtrList<Property> properties(const QString &name);
+
+ Iterator begin();
+ Iterator end();
+
+signals:
+ /**Emitted when the value of the property is changed.*/
+ void propertyValueChanged(Property* property);
+ /**Emitted when property is about to be deleted.*/
+ void aboutToDeleteProperty(Property* property);
+
+protected:
+ /**Constructs a list which owns or does not own it's properties.*/
+ PropertyList(bool propertyOwner);
+
+ /**Adds property to a group.*/
+ void addToGroup(const QString &group, MultiProperty *property);
+ /**Removes property from a group.*/
+ void removeFromGroup(MultiProperty *property);
+
+private:
+ //sorted list of properties in form name: property
+ QMap<QString, MultiProperty*> m_list;
+
+ //groups of properties:
+ // list of group name: (list of property names)
+ QValueList<QPair<QString, QValueList<QString> > > m_propertiesOfGroup;
+ // map of property: group
+ QMap<MultiProperty*, QString> m_groupOfProperty;
+
+ //indicates that this list will delete properties after removeProperty()
+ //and also in destructor
+ bool m_propertyOwner;
+
+friend class MultiProperty;
+friend class PropertyBuffer;
+friend class Iterator;
+};
+
+
+/**
+@short The list of properties which does not own them.
+
+This class acts as @ref PropertyLib::PropertyList but it does not delete properties
+in destructor (i.e. it does not own properties).
+This class should be used to store results of property intersections.
+
+Example:
+/code
+PropertyList *list = new PropertyList();
+PropertyList *list2 = new PropertyList();
+PropertyList *list3 = new PropertyList();
+...
+PropertyBuffer *buf = new PropertyBuffer(list);
+buf->intersect(list2);
+buf->intersect(list3);
+...
+/endcode
+*/
+class PropertyBuffer: public PropertyList{
+ Q_OBJECT
+public:
+ /**Constructs a buffer from given property list.*/
+ PropertyBuffer(PropertyList *list);
+ /**Constructs an empty property buffer.*/
+ PropertyBuffer();
+
+ /**Intersects with other @ref PropertyLib::PropertyList.*/
+ virtual void intersect(const PropertyList *list);
+
+protected slots:
+ void intersectedValueChanged(Property *property);
+
+};
+
+}
+
+#endif