uigraphicsscene.h

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#ifndef uigraphicsscene_h
#define uigraphicsscene_h

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        Nanne Hemstra
 Date:          January 2008
 RCS:           $Id$
________________________________________________________________________

-*/

#include "uibasemod.h"
#include "uigraphicsitem.h"
#include "task.h"
#include "bufstringset.h"
#include "color.h"
#include "keyboardevent.h"
#include "mouseevent.h"
#include "namedobj.h"


mFDQtclass(QGraphicsScene)
mFDQtclass(QGraphicsLinearLayout)
mFDQtclass(QGraphicsWidget)
mFDQtclass(ODGraphicsScene)

class ArrowStyle;
class Alignment;
class MarkerStyle2D;

class uiPolygonItem;
class uiPolyLineItem;
class uiRectItem;
class uiObjectItem;

mExpClass(uiBase) uiGraphicsScene : public NamedObject
{
public:
                                uiGraphicsScene(const char*);
                                ~uiGraphicsScene();

    void                        removeAllItems();
    uiGraphicsItem*             removeItem(uiGraphicsItem*);
    uiGraphicsItemSet*          removeItems(uiGraphicsItemSet*);
    template <class T> T*       addItem(T*);
    uiGraphicsItemSet*          addItems(uiGraphicsItemSet*);
    uiGraphicsItemGroup*        addItemGrp(uiGraphicsItemGroup*);
    int                         nrItems() const;
    uiGraphicsItem*             getItem(int id);
    const uiGraphicsItem*       getItem(int id) const;
    uiGraphicsItem*             itemAt(const Geom::Point2D<float>&);
    const uiGraphicsItem*       itemAt(const Geom::Point2D<float>&) const;

    uiRectItem*                 addRect(float x,float y,float w,float h);

    uiPolygonItem*              addPolygon(const TypeSet<uiPoint>&,bool fill);
    uiPolyLineItem*             addPolyLine(const TypeSet<uiPoint>&);

    void                        useBackgroundPattern(bool);
    void                        setBackGroundColor(const Color&);
    const Color                 backGroundColor() const;

    int                         getSelItemSize() const;
    uiRect                      getSelectedArea() const;
    void                        setSelectionArea(const uiRect&);

    MouseEventHandler&          getMouseEventHandler()
                                { return mousehandler_; }

    Notifier<uiGraphicsScene>   ctrlPPressed;
    Notifier<uiGraphicsScene>   ctrlCPressed;
    double                      width() const;
    double                      height() const;

    void                        saveAsImage(const char*,int,int,int);
    void                        saveAsPDF(const char*,int w,int h,int r);
    void                        saveAsPS(const char*,int w,int h,int r);
    void                        saveAsPDF_PS(const char*,bool pdf_or_ps,int w,
                                             int h,int r);
    void                        setSceneRect(float x,float y,float w,float h);
    uiRect                      sceneRect();

    bool                        isMouseEventActive() const
                                { return ismouseeventactive_; }
    void                        setMouseEventActive( bool yn )
                                { ismouseeventactive_ = yn; }
    mQtclass(QGraphicsScene*)   qGraphicsScene()
                        {return (mQtclass(QGraphicsScene*))odgraphicsscene_;}
    void                        copyToClipBoard();


    void                        addUpdateToQueue(Task*);
    bool                        executePendingUpdates();

    void                        setPixelDensity(float);
    float                       getPixelDensity() const {return pixeldensity_;}
    static float                getDefaultPixelDensity();

    Notifier<uiGraphicsScene>   pixelDensityChange;

    void                        translateText();
protected:

    ObjectSet<uiGraphicsItem>   items_;
    ODGraphicsScene*            odgraphicsscene_;

    void                        CtrlCPressedCB(CallBacker*);
    MouseEventHandler           mousehandler_;
    bool                        ismouseeventactive_;
    friend class                uiGraphicsItem;
    uiGraphicsItem*             doAddItem(uiGraphicsItem*);
    int                         indexOf(int id) const;

    int                         queueid_;
    float                       pixeldensity_;
};


template <class T>
inline T* uiGraphicsScene::addItem( T* itm )
{
    return (T*) doAddItem( itm );
}


mExpClass(uiBase) uiGraphicsObjectScene : public uiGraphicsScene
{
public:
                                uiGraphicsObjectScene(const char*);

    void                        addObjectItem(uiObjectItem*);
    void                        insertObjectItem(int,uiObjectItem*);
    void                        removeObjectItem(uiObjectItem*);
    void                        setItemStretch(uiObjectItem*,int stretch);
    int                 stretchFactor(uiObjectItem*) const;

    void                        setLayoutPos(const uiPoint&);
    const uiPoint               layoutPos() const;
    const uiSize                layoutSize() const;

protected:

    void                        resizeLayoutToContent();

    mQtclass(QGraphicsLinearLayout*)    layout_;
    mQtclass(QGraphicsWidget*)          layoutitem_;
};


mClass(uiBase) uiGraphicsSceneChanger : public Task
{
public:
    uiGraphicsSceneChanger(uiGraphicsScene&,uiGraphicsItem&,bool remove);
    uiGraphicsSceneChanger(uiGraphicsItemGroup&,uiGraphicsItem&,bool remove);

    bool execute();

protected:
    uiGraphicsScene*            scene_;
    uiGraphicsItemGroup*        group_;
    uiGraphicsItem&             itm_;
    bool                        remove_;
};


#endif