view.h

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// $Id: view.h 1323 2006-06-14 18:52:43Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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              respective authors. See AUTHORS file for details.

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----------------------------------

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=================================XARAHEADEREND============================
 */

// Base class for kernel View objects.

#ifndef INC_VIEW
#define INC_VIEW

#include "listitem.h"
#include "quality.h"
#include "matrix.h"
#include "docrect.h"
#include "rendtype.h"
#include "oilrect.h"
#include "rndrgn.h"
#include "colcarry.h"
#include "colmodel.h"
//#include "viewbitmapcache.h"

class CCamView;
class ViewState;
class Document;
class wxDC;
class RenderRegion;
class ScanningRenderRegion;
class Spread;
class PaperRenderRegion;
class Node;
class PrintControl;
//  WEBSTER-ranbirr-13/11/96
#ifndef WEBSTER
class CCPrintInfo;
#endif //webster
class ColourPlate;


/********************************************************************************************

>   class ProgressInfo

    Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
    Created:    05/25/95
    Purpose:    Encapsulates various bits of information required to provide a progress
                display while printing/exporting via View::RenderSimpleView().
    SeeAlso:    View::RenderSimpleView

********************************************************************************************/

class ProgressDisplay
{
public:
    ProgressDisplay();

    // Functions to do the normal progress display (eekk)
    void SetUp(RenderRegion *pRender, ScanningRenderRegion* pScanner);
    BOOL IncProgress(INT32 NumNodes = 1);
    BOOL FirstStageDone();
    BOOL SecondStageDone();
    void AllStagesDone();
    void StartBitmapPhase(INT32 NumBands);
    void StartBitmapPhaseBand(INT32 TotalNumScanlines);
    BOOL BitmapPhaseBandRenderedTo(INT32 ScanlinesRendered);
    BOOL EndBitmapPhaseBand();

    // Functions to deal with the Optimal Render View function
    // this is much simpler, so it gets its own functions.
    void SetUpOptimal(RenderRegion *pRender, ScanningRenderRegion* pScanner);
    BOOL SetNodesRendered(INT32 NumNodes);

protected:
    // General variables
    BOOL DoProgressDisplay;
    BOOL IsPrinting;
    INT32 NumNodesRendered;
    INT32 LastProgressUpdate;

    // 'Normal' node rendering.
    INT32 ProgressInterval;
    INT32 FirstStageCount;
    INT32 SecondStageCount;
    INT32 ThirdStageCount;

    // Banded bitmap rendering
    INT32 BandSize;
    INT32 BandHeight;
    INT32 BandOffset;
    INT32 BandIncrement;

    // Optimal Rendering vars
    INT32 TotalNodes;
//  WEBSTER-ranbirr-13/11/96
#ifndef WEBSTER
    // Used to update print progress (if printing)
    CCPrintInfo *pPrintInfo;
#endif //webster
    // How much we have scaled up the node count by to get a decent progress resolution.
    INT32 ProgressScaleFactor;
};

/********************************************************************************************

< RenderViewResult

    Comment:    This is used to indicate the outcome of calling View::RenderSimpleView.
    SeeAlso:    View::RenderSimpleView

********************************************************************************************/ 

enum RenderViewResult       
{ 
    RENDERVIEW_SUCCESS,
    RENDERVIEW_NOTNEEDED,
    RENDERVIEW_FAILURE, 
    RENDERVIEW_USERABORT 
};



/********************************************************************************************

>   class View : public ListItem

    Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/07/95
    Purpose:    The basic kernel view item.  This class contains minimal functionality to
                maintain the 'current' view, and the connection from a kernel view
                object to an OIL view object.
                DocView and PrintView are derived from this class.
    SeeAlso:    DocView; PrintView

********************************************************************************************/

class View : public ListItem
{
    CC_DECLARE_DYNAMIC(View);

public:
    View();
    virtual ~View();
    static void Deinit();

//  Interface to the OIL layer CCamView and the kernel Document.

protected:
    CCamView*           pViewWindow;            // Pointer to the associated CCamView
    Document*           pDoc;                   // Pointer to owner document.
    ViewState*          pVState;                // Device independent state of the view.

public:
    BOOL ConnectToOilView(CCamView*);           // Set up the link to the CCamView object
    
    Document* GetDoc() const;                   // Returns document associated with this
    CCamView* GetConnectionToOilView() const;   // Which CCamView are we linked to
    PrintControl *GetPrintControl();            // Get print control for our document.

    virtual void SetViewState(ViewState*);
    virtual BOOL ViewStateChanged() = 0;        // informs us that ViewState has changed


//  "Current" and "Selected" Views

protected:
    static View* Current;                       // Global which records Current View

public:
    static View* GetCurrent();                  // Returns which View is current
    BOOL SetCurrent();                          // Make this View current
    static void SetNoCurrent();                 // Make NO View current

    virtual void SetViewPixelSize() = 0;        // Set pixel size according to this view.

//  Rendering

public:
    void OnDraw(wxDC*, OilRect);
    virtual void ContinueRenderView(RenderRegion*, Spread*,
                                    BOOL fRenderPaper = TRUE,
                                    BOOL fDeleteRegionAfter = TRUE,
                                    BOOL bForceImmediate = FALSE) = 0;
    virtual wxDC* GetRenderDC() = 0;
    virtual void AllocateDC();
    virtual void DoneWithDC();
    virtual BOOL RenderTreeCallback(Node* pNode, RenderRegion* pRender) {return TRUE;}

    Quality RenderQuality;                      // WYSIWYG value (only freinds of Quality can
                                                // get/set numeric value

    // Functions to render complex shapes into simple render regions
    RenderViewResult RenderOptimalView(RenderRegion*r, Matrix&, Spread*, BOOL);
    SlowJobResult RenderOptimalBitmapPhase(DocRect& ClipRect, Matrix&, Spread*, RenderRegion*, Node*, Node*,
                            BOOL RenderAllObjects, BOOL bPrintPaper, INT32&, ProgressDisplay* pProgress, INT32 TotalProgress);

    virtual RenderViewResult RenderSimpleView(RenderRegion*, Matrix&, Spread*, BOOL);
    SlowJobResult RenderBitmapPhase(DocRect& ClipRect, Matrix&, Spread*, RenderRegion*, Node*, Node*,
                                    BOOL bRenderAll, BOOL bPrintPaper, ProgressDisplay& Progress);

    static void DeInitOnTopRegion();
    static BOOL IsPrintableNodeSelected(Node *);

    virtual void RenderPaper(Spread*, DocRect, wxDC*, Matrix&);
    virtual BOOL RenderPageMarks(RenderRegion*, Matrix&, DocRect&, Spread*);

protected:
    virtual void RenderPaper(RenderRegion*, Spread*);

    SlowJobResult RenderSimpleNodes(Node *pNode, RenderRegion *pRender,
                           ProgressDisplay& Progress, Node *pLastComplexNode = NULL);
    SlowJobResult RenderSimpleNodesUnclipped(Node *pNode, RenderRegion *pRender,
                           ProgressDisplay& Progress, Node *pLastComplexNode = NULL);

private:
    static PaperRenderRegion* pPaperRegion;     // Region to use when rendering paper only
                                                // (i.e. only for screen views)

    static PaperRenderRegion* pOnTopRegion;     // Region to use when rendering blobs only
                                                // (i.e. only for screen views)

//  ViewBitmapCache m_CachedBitmaps;            // Collection of bitmaps for rendering optimisation

public:
    virtual BOOL GetForeBackMode() = 0;
    virtual void SetForeBackMode(BOOL) = 0;

    virtual Matrix ConstructRenderingMatrix(Spread *pSpread);
    // Ilan 06/06/00
    virtual Matrix ConstructScaledRenderingMatrix(Spread *pSpread, double ScaleFactor);

protected:
    RenderRegion *NewRenderRegion(DocRect InvalidRect, Matrix& ViewMatrix,
                                    wxDC* pDevContext, Spread* pSpread, RenderType rType,
                                    bool fOwned = false );
    
    // Function to build and control the render regions
    virtual void MakeNewRenderRegion(Spread *, DocRect, wxDC *, RenderType, BOOL PaintPaper = FALSE, Node* pInvalidNode = NULL);

public:
    // Get/Set the size of OIL pixels that this view uses.
    FIXED16 GetPixelWidth();
    FIXED16 GetPixelHeight();
    void GetPixelSize(FIXED16 *PixelWidth, FIXED16 *PixelHeight);
    virtual void SetPixelSize(FIXED16 PixelWidth, FIXED16 PixelHeight);

    FIXED16 GetScaledPixelWidth();
    FIXED16 GetScaledPixelHeight();
    void GetScaledPixelSize(FIXED16 *PixelWidth, FIXED16 *PixelHeight);
    virtual void SetScaledPixelSize(FIXED16 PixelWidth, FIXED16 PixelHeight);

    virtual double GetConvertToEditableShapesDPI();

protected:
    // Actual size of OIL pixels that this view uses.
    FIXED16 PixelWidth,
            PixelHeight;

    // Scaled size of OIL pixels that this view uses.
    FIXED16 ScaledPixelWidth,
            ScaledPixelHeight;


public:     // Colour contexts
    ColourContext *GetColourContext(ColourModel Model, BOOL ReturnNULLIfNone = FALSE);
            // Find the view's context for the given colour model

    ColourPlate *GetColourPlate(void);
            // Find out what ColourPlate separation (if any) this view is using

    void SetColourPlate(ColourPlate *NewPlate, BOOL bSendContextChanged = TRUE);
            // Set the colour separation mode that will be used in all future output
            // from this view

    void SetColourContext(ColourModel Model, ColourContext *NewContext = NULL);
            // Set or clear the special colour context for a given colour model.
            // The View will delete the context when it is finished with it, or when
            // you call this function again with another context or a NULL pointer.

    BOOL GetForceDefaultColourContexts(void) { return(ForceDefaultColourContexts); }
    
    BOOL SetForceDefaultColourContexts(BOOL bForceDefault = TRUE)
    {
        BOOL bOldForce = ForceDefaultColourContexts;
        ForceDefaultColourContexts = bForceDefault;
        return(bOldForce);
    }

protected:
    ColourPlate *ColPlate;                  // NULL, or Current colour separation options
    ColourContextArray ColourContexts;      // Cached colour contexts using the ColourPlate
    BOOL ShouldDeleteContext[16];           // Flags for each cached context

    BOOL ForceDefaultColourContexts;        // Internal flag
                                            // if TRUE, forces GetColourContext to return global
                                            // default colour contexts rather than special ones.
                                            // Used by RenderOptimalBitmapPhase to disable colour
                                            // separation/correction in masked bitmap rendering.


//  Scrolling, scaling and extents

protected:
    FIXED16     Scale;                              // User viewing/printing scale factor.
    DocRect     PhysExtent;                         // Size of a document (bang!)

public:
    WorkCoord GetScrollOffsets() const;
    virtual BOOL SetScrollOffsets(WorkCoord, BOOL RedrawNeeded = TRUE);

    FIXED16 GetViewScale() const;                   // ? the user scale in this view
    virtual BOOL SetViewScale(FIXED16);             // Set the user scale factor

    virtual DocRect GetDocViewRect(Spread*) = 0;
    virtual void SetExtent(DocCoord, DocCoord) = 0; // Reset the extent of the document
    virtual WorkRect GetViewRect() = 0;             // The physical rect of the view


//  Dragging

protected:
    BOOL        m_bSolidDrag;                       // Flag indicating that current drag is solid

};




/********************************************************************************************

>   class CountView : Public View

    Author:     Phil_Martin (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/06/2004
    Purpose:    For counting "rendered" objects without actually rendering them
    SeeAlso:    View

********************************************************************************************/

/*class CountView : Public View
{
    virtual BOOL RenderSubtreeCallback(Node* pNode, RenderRegion* pRender);
};
*/


class ScopedFlagSetter
{
public:
    ScopedFlagSetter(BOOL& bTarget, BOOL bNewVal)
    {
        // Remeber a pointer to the target and the original value
        m_pbTarget = &bTarget;
        m_bOldVal = bTarget;
        // And set the target to the new value
        bTarget = bNewVal;
    }

    ~ScopedFlagSetter()
    {
        // Reset the target to the original value
        *m_pbTarget = m_bOldVal;
    }
    BOOL m_bOldVal;
    BOOL* m_pbTarget;
};



#endif  // INC_VIEW

---