csrstack.h

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// $Id: csrstack.h 1646 2006-08-02 15:32:50Z luke $
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 */
// The Cursor Stack (interface).


#ifndef CSRSTACK__INC
#define CSRSTACK__INC


class Cursor;


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

>   class CursorIdent : public CC_CLASS_MEMDUMP

    Author:     Jim_Lynn (Xara Group Ltd) <camelotdev@xara.com>
    Created:    27/1/95
    Purpose:    Used in the cursor stack - holds a pointer to a cursor and an identifying ID
    SeeAlso:    CursorStack

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

class CursorIdent : public CC_CLASS_MEMDUMP
{
public:
    Cursor* pCursor;                // The pointer to the cursor this object refers to
    INT32 UniqueID;                 // Unique identifying ID that is used to reference objects
                                    // on the cursor stack
    static INT32 NextUniqueID;      // static variable holding next ID to be used

    CursorIdent();                  // Default constructor
    ~CursorIdent();                 // Destructor

    INT32 StoreNewCursor(Cursor* NewCursor);

};

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

>   class CursorStack : public CC_CLASS_MEMDUMP

    Author:     Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
    Created:    15th November, 1993
    Purpose:    A stack of Cursor objects, which is part of the kernel (NB Cursor objects are
                part of the OIL).

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

class CursorStack : public CC_CLASS_MEMDUMP
{
    friend void BeginBusyCursor();
    friend void EndBusyCursor();
    friend void SmashBusyCursor();

    // Give my name in memory dumps
    CC_DECLARE_MEMDUMP(CursorStack);

public:
    CursorStack(INT32 maxdepth = 10);               // construct a (default-sized) stack of cursors
    virtual ~CursorStack();

    static BOOL Init();                         // called upon application startup and shutdown
    static void DeInit();

// new static functions to replace accessing Global directly
    static BOOL GIsValid();
    static INT32 GPush(Cursor* pCursor, BOOL ActivateNow = TRUE);
    static Cursor* GPop(INT32 cursorID/* = 0 */);
    static Cursor* GSetTop(Cursor* pCursor, INT32 cursorID/*  = 0*/);
    static void GSetActive();
    static BOOL GIsActive(const Cursor* pCursor);

    static Cursor* GetActive();
    
    void BeginBusy();                           // Set the busy cursor (and increment the busy count)
    void EndBusy();                             // clear the busy cursor (if the busy count reaches zero)
    void SmashBusy();                           // Smash the busy cursor (ensure it is off)

// these are the original member functions, which will probably go private in time
private:
    BOOL IsValid() const;

    INT32 Push(Cursor* pCursor, BOOL ActivateNow = TRUE);
    Cursor* Pop(INT32 cursorID = 0);
    Cursor* SetTop(Cursor* pCursor, INT32 cursorID = 0);

    void SetActive( bool fOnlyRendWnd = true ) const;
    BOOL IsActive(const Cursor* pCursor) const;

// IMPORTANT: DONT USE THIS VAR IN NEW CODE - IT IS DUE TO DIE SOON
    static CursorStack* Global;                 // the stack shared by the whole application

    CursorIdent* pcStack;                       // Pointer to array of CursorIdent objects
    INT32 nNextFreeSlot;                            // index of the next available slot in the array
    INT32 nSentinel;                                // one more than the last slot in the array

    INT32 BusyCount;                                // if >0, show the busy cursor

};



// These global functions provide a convenient shorthand for common cursor functions.

void BeginBusyCursor();
void EndBusyCursor();
void SmashBusyCursor();


#endif  // CSRSTACK__INC

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