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/*
* Copyright (c) 2005 Casper Boemann <cbr@boemann.dk>
*
* this program 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.
*
* 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 general public license
* along with this program; if not, write to the free software
* foundation, inc., 675 mass ave, cambridge, ma 02139, usa.
*/
#ifndef KIS_GROUP_LAYER_H_
#define KIS_GROUP_LAYER_H_
#include <ksharedptr.h>
#include "kis_layer.h"
#include "kis_types.h"
#include "kis_paint_layer.h"
class KisMergeVisitor;
/**
* A KisLayer that bundles child layers into a single layer.
* The top layer is firstChild(), with index 0; the bottommost lastChild() with index childCount() - 1.
* KisLayer::nextSibling() moves towards higher indices, from the top to the bottom layer; prevSibling() the reverse.
* (Implementation detail: internally, the indices are reversed, for speed.)
**/
class KisGroupLayer : public KisLayer {
typedef KisLayer super;
Q_OBJECT
public:
KisGroupLayer(KisImage *img, const QString &name, Q_UINT8 opacity);
KisGroupLayer(const KisGroupLayer& rhs);
virtual ~KisGroupLayer();
virtual KisLayerSP clone() const;
public:
/**
* Set the entire layer extent dirty; this percolates up to parent layers all the
* way to the root layer.
*/
virtual void setDirty(bool propagate = true);
/**
* Add the given rect to the set of dirty rects for this layer;
* this percolates up to parent layers all the way to the root
* layer.
*/
virtual void setDirty(const QRect & rect, bool propagate = true);
virtual void activate() {};
virtual void deactivate() {};
virtual Q_INT32 x() const;
virtual void setX(Q_INT32);
virtual Q_INT32 y() const;
virtual void setY(Q_INT32);
// Sets this layer and all its descendants' owner image to the given image.
virtual void setImage(KisImage *image);
virtual QRect extent() const;
virtual QRect exactBounds() const;
virtual bool accept(KisLayerVisitor &v)
{
// kdDebug(41001) << "GROUP\t\t" << name()
// << " dirty: " << dirty()
// << ", " << m_layers.count() << " children "
// << ", projection: " << m_projection
// << "\n";
return v.visit(this);
};
virtual void resetProjection(KisPaintDevice* to = 0); /// will copy from to, if !0, CoW!!
virtual KisPaintDeviceSP projection(const QRect & rect);
virtual uint childCount() const;
virtual KisLayerSP firstChild() const;
virtual KisLayerSP lastChild() const;
/// Returns the layer at the specified index.
virtual KisLayerSP at(int index) const;
/// Returns the index of the layer if it's in this group, or -1 otherwise.
virtual int index(KisLayerSP layer) const;
/// Moves the specified layer to the specified index in the group, if it's already a member of this group.
virtual void setIndex(KisLayerSP layer, int index);
/** Adds the layer to this group at the specified index. childCount() is a valid index and appends to the end.
Fails and returns false if the layer is already in this group or any other (remove it first.) */
virtual bool addLayer(KisLayerSP newLayer, int index);
/**
* Add the specified layer above the specified layer (if aboveThis == 0, the bottom is used) */
virtual bool addLayer(KisLayerSP newLayer, KisLayerSP aboveThis);
/// Removes the layer at the specified index from the group.
virtual bool removeLayer(int index);
/// Removes the layer from this group. Fails if there's no such layer in this group.
virtual bool removeLayer(KisLayerSP layer);
virtual QImage createThumbnail(Q_INT32 w, Q_INT32 h);
/// Returns if the layer will induce the projection hack (if the only layer in this group)
virtual bool paintLayerInducesProjectionOptimization(KisPaintLayer* l);
signals:
void sigDirty(QRect rc);
private:
void updateProjection(const QRect & rc);
inline int reverseIndex(int index) const { return childCount() - 1 - index; };
vKisLayerSP m_layers; // Contains the list of all layers
KisPaintDeviceSP m_projection; // The cached composition of all layers in this group
Q_INT32 m_x;
Q_INT32 m_y;
};
#endif // KIS_GROUP_LAYER_H_
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