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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);
virtual ~KoShapeManager();
/**
* 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;
/**
* 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, 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);
/// 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 posponed 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.
*/
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);
signals:
/// emitted when the selection is changed
void selectionChanged();
/// emitted when an object in the selection is changed (moved/rotated etc)
void selectionContentChanged();
private:
friend class KoShapeManagerPaintingStrategy;
KoCanvasBase *canvas();
class Private;
Private * const d;
Q_PRIVATE_SLOT(d, void updateTree())
};
#endif
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