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 /* This file is part of the KDE project
 
    Copyright (C) 2006-2008 Thorsten Zachmann <zachmann@kde.org>
    Copyright (C) 2007, 2009 Thomas Zander <zander@kde.org>
 
    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; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
 */
 
 #ifndef KOSHAPEMANAGER_H
 #define KOSHAPEMANAGER_H
 
 #include <QList>
 #include <QObject>
 #include <QSet>
 
 #include "KoFlake.h"
 #include "flake_export.h"
 
 class KoShape;
 class KoSelection;
 class KoViewConverter;
 class KoCanvasBase;
 class KoPointerEvent;
 class KoShapeManagerPaintingStrategy;
 class KoShapePaintingContext;
 
 
 class QPainter;
 class QPointF;
 class QRectF;
 
 /**
  * The shape manager hold a list of all shape which are in scope.
  * There is one shape manager per canvas. This makes the shape manager
  * different from QGraphicsScene, which contains the datamodel for all
  * graphics items: KoShapeManager only contains the subset of shapes
  * that are shown in its canvas.
  *
  * The selection in the different views can be different.
  */
 class FLAKE_EXPORT KoShapeManager : public QObject
 {
     Q_OBJECT
 
 public:
     /// enum for add()
     enum Repaint {
         PaintShapeOnAdd,    ///< Causes each shapes 'update()' to be called after being added to the shapeManager
         AddWithoutRepaint   ///< Avoids each shapes 'update()' to be called for faster addition when its possible.
     };
 
     /**
      * Constructor.
      */
     explicit KoShapeManager(KoCanvasBase *canvas);
     /**
      * Constructor that takes a list of shapes, convenience version.
      * @param shapes the shapes to start out with, see also setShapes()
      * @param canvas the canvas this shape manager is working on.
      */
     KoShapeManager(KoCanvasBase *canvas, const QList<KoShape *> &shapes);
     ~KoShapeManager() override;
 
 
     /**
      * Remove all previously owned shapes and make the argument list the new shapes
      * to be managed by this manager.
      * @param shapes the new shapes to manage.
      * @param repaint if true it will trigger a repaint of the shapes
      */
     void setShapes(const QList<KoShape *> &shapes, Repaint repaint = PaintShapeOnAdd);
 
     /// returns the list of maintained shapes
     QList<KoShape*> shapes() const;
 
     /**
      * Get a list of all shapes that don't have a parent.
      */
     QList<KoShape*> topLevelShapes() const;
 
 public Q_SLOTS:
     /**
      * Add a KoShape to be displayed and managed by this manager.
      * This will trigger a repaint of the shape.
      * @param shape the shape to add
      * @param repaint if true it will trigger a repaint of the shape
      */
     void addShape(KoShape *shape, KoShapeManager::Repaint repaint = PaintShapeOnAdd);
 
     /**
      * Add an additional shape to the manager.
      *
      * For additional shapes only updates are handled
      */
     void addAdditional(KoShape *shape);
 
     /**
      * Remove a KoShape from this manager
      * @param shape the shape to remove
      */
     void remove(KoShape *shape);
 
     /**
      * Remove an additional shape
      *
      * For additional shapes only updates are handled
      */
     void removeAdditional(KoShape *shape);
 
 public:
     /// return the selection shapes for this shapeManager
     KoSelection *selection() const;
 
     /**
      * Paint all shapes and their selection handles etc.
      * @param painter the painter to paint to.
      * @param forPrint if true, make sure only actual content is drawn and no decorations.
      * @param converter to convert between document and view coordinates.
      */
     void paint(QPainter &painter, const KoViewConverter &converter, bool forPrint);
 
     /**
      * Returns the shape located at a specific point in the document.
      * If more than one shape is located at the specific point, the given selection type
      * controls which of them is returned.
      * @param position the position in the document coordinate system.
      * @param selection controls which shape is returned when more than one shape is at the specific point
      * @param omitHiddenShapes if true, only visible shapes are considered
      */
     KoShape *shapeAt(const QPointF &position, KoFlake::ShapeSelection selection = KoFlake::ShapeOnTop, bool omitHiddenShapes = true);
 
     /**
      * Returns the shapes which intersects the specific rect in the document.
      * @param rect the rectangle in the document coordinate system.
      * @param omitHiddenShapes if true, only visible shapes are considered
      */
     QList<KoShape *> shapesAt(const QRectF &rect, bool omitHiddenShapes = true);
 
     /**
      * Request a repaint to be queued.
      * The repaint will be restricted to the parameters rectangle, which is expected to be
      * in points (the document coordinates system of KoShape) and it is expected to be
      * normalized and based in the global coordinates, not any local coordinates.
      * <p>This method will return immediately and only request a repaint. Successive calls
      * will be merged into an appropriate repaint action.
      * @param rect the rectangle (in pt) to queue for repaint.
      * @param shape the shape that is going to be redrawn; only needed when selectionHandles=true
      * @param selectionHandles if true; find out if the shape is selected and repaint its
      *   selection handles at the same time.
      */
     void update(QRectF &rect, const KoShape *shape = 0, bool selectionHandles = false);
 
     /**
      * Update the tree for finding the shapes.
      * This will remove the shape from the tree and will reinsert it again.
      * The update to the tree will be postponed until it is needed so that successive calls
      * will be merged into one.
      * @param shape the shape to updated its position in the tree.
      */
     void notifyShapeChanged(KoShape *shape);
 
     /**
      * Switch to editing the shape that is at the position of the event.
      * This method will check select a shape at the event position and switch to the default tool
      * for that shape, or switch to the default tool if there is no shape at the position.
      * @param event the event that holds the point where to look for a shape.
      */
     void suggestChangeTool(KoPointerEvent *event);
 
     /**
      * Paint a shape
      *
      * @param shape the shape to paint
      * @param painter the painter to paint to.
      * @param converter to convert between document and view coordinates.
      * @param paintContext the painting context.
      */
     void paintShape(KoShape *shape, QPainter &painter, const KoViewConverter &converter, KoShapePaintingContext &paintContext);
 
     /**
      * Set the strategy of the KoShapeManager
      *
      * This can be used to change the behaviour of the painting of the shapes.
      * @param strategy the new strategy. The ownership of the argument \p
      *    strategy will be taken by the shape manager.
      */
     void setPaintingStrategy(KoShapeManagerPaintingStrategy *strategy);
 
 Q_SIGNALS:
     /// emitted when the selection is changed
     void selectionChanged();
     /// emitted when an object in the selection is changed (moved/rotated etc)
     void selectionContentChanged();
     /// emitted when any object changed (moved/rotated etc)
     void contentChanged();
     /// emitted when a shape is removed.
     void shapeRemoved(KoShape *);
     /// emitted when any shape changed.
     void shapeChanged(KoShape *);
 
 private:
 
     friend class KoShapeManagerPaintingStrategy;
     KoCanvasBase *canvas();
 
 
     class Private;
     Private * const d;
     Q_PRIVATE_SLOT(d, void updateTree())
 };
 
 #endif