vstate.cpp

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// $Id: vstate.cpp 1282 2006-06-09 09:46:49Z alex $
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 */

// The ViewState object - contains a platform-independent description of a view onto
// a document.

#include "camtypes.h"
#include "vstate.h"
//#include "oilcoord.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "docview.h" - in camtypes.h [AUTOMATICALLY REMOVED]

// Declare smart memory handling in Debug builds
#define new CAM_DEBUG_NEW

// Construction and destruction.

ViewState::ViewState()
{
    // Set all the params to defaults
    pView = NULL;

    // Make all rects empty
    ScreenRect.MakeEmpty();
    ParentRect.MakeEmpty();
    ViewRect.MakeEmpty();
    WorkAreaExtent.MakeEmpty();
    IconPoint = Coord(0,0);

    ViewScale = 0;
    zPos = 0;
    
    IsNewView = TRUE;
    IsMinimised = FALSE;
    IsMaximised = FALSE;
    AlwaysOnTop = FALSE;
    RulersVisible = FALSE;
    ScrollersVisible = TRUE;
    ScrollPosition = WorkCoord(0,0);

    _GridShow = _GridSnap = _ObjectsSnap = _MagObjectsSnap = _PrintBorderShow = FALSE;
    _LogicalView = _GuidesSnap = _GuidesShow = FALSE;
}



ViewState::~ViewState()
{
    // empty
}




/********************************************************************************************
>   WorkCoord ViewState::SetScrollPos(WorkCoord sp, BOOL fPixelise = TRUE) 

    Author:     Phil_Martin (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/11/94
    Inputs:     New scroll position and whether to pixelise it.
    Outputs:    Pixelised scroll position.
    Returns:    None
    Purpose:    Set the scroll position in WorkCoords for use by DocView and CamView.
    Errors:     None

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

WorkCoord ViewState::SetScrollPos(WorkCoord sp, BOOL fPixelise /* = TRUE */)
{
    ERROR3IF(!fPixelise, "ViewState::SetScrollPos called with Pixelise = FALSE");

//  TRACE( _T("VS::SetScrollPos(%d, %d)\n"), (INT32)(sp.x), (INT32)(sp.y));

    FIXED16 PixelWidth, PixelHeight;    
    ERROR2IF(pView == NULL, ScrollPosition, "No attached view in ViewState::SetScrollPos");
    pView->GetPixelSize(&PixelWidth, &PixelHeight);

    INT32 pw = PixelWidth.MakeLong();
    INT32 ph = PixelHeight.MakeLong();

    if (sp.x < 0) sp.x -= (pw - 1);         // Overcome the flooring of negative values
    if (sp.y < 0) sp.y -= (ph - 1);         // towards 0 by the upcoming divisions...

    ScrollPosition.x = (sp.x / pw) * pw;
    ScrollPosition.y = (sp.y / ph) * ph;

    return ScrollPosition;
}




/********************************************************************************************
>   WorkCoord ViewState::GetScrollPos(BOOL Pixelise = TRUE) 

    Author:     Phil_Martin (Xara Group Ltd) <camelotdev@xara.com>
    Created:    09/11/94
    Inputs:     None
    Outputs:    None
    Returns:    Scroll position
    Purpose:    Set the scroll position in WorkCoords for use by DocView and CamView.
    Errors:     None

********************************************************************************************/
/*
    Technical notes:
    This routine provides restricted access to the ScrollPosition member of ViewState.
    It ensures that the scroll position is aligned to a whole pixel boundary at all times by
    dividing and re-multiplying by the pixel size (YUK).

    Note that when a negative value is divided in C++ it is done so without regard for the
    sign of the value.
    E.g.
        21 / 4 = 5  Result has been truncated towards 0, moving Y coordinates down
        -21/ 4 = 5  Result has been truncated towards 0 again, moving Y coordinates UP!!!
    In other words when the values are coordinates the division truncates them in different
    directions depending which side of the origin they are on!
    This is obviously not required and so any negative values are adjusted before the division
    to ensure the end result is movement in the same direction as positive values.

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

WorkCoord ViewState::GetScrollPos(BOOL Pixelise)
{
    ERROR3IF(!Pixelise, "ViewState::GetScrollPos called with Pixelise = FALSE");
    return(ScrollPosition);

#if FALSE
    WorkCoord temp = ScrollPosition;

    // If we have a NULL view, return quietly, cos this is probably in 
    // some rendering code.
    if (Pixelise)
    {
        FIXED16 PixelWidth, PixelHeight;    
        ERROR2IF(pView == NULL, temp, "No attached view in ViewState::GetScrollPos");
        pView->GetPixelSize(&PixelWidth, &PixelHeight);
    
        INT32 pw = PixelWidth.MakeLong();
        INT32 ph = PixelHeight.MakeLong();

        if (temp.x < 0) temp.x -= (pw - 1);         // Overcome the flooring of negative values
        if (temp.y < 0) temp.y -= (ph - 1);         // towards 0 by the upcoming divisions...

        temp.x = (temp.x / pw) * pw;
        temp.y = (temp.y / ph) * ph;
    }
    return temp;
#endif
}


/*

void ViewState::Serialize(CArchive& ar)
{
    // Serialize the base class first.
    CObject::Serialize(ar);

    if (ar.IsStoring())
    {
        // Save the size of the screen.
        ar << ScreenRect.lo.x << ScreenRect.lo.y
           << ScreenRect.hi.x << ScreenRect.hi.y;

        // Save the size of the parent (MDI) frame window.
        ar << ParentRect.lo.x << ParentRect.lo.y
           << ParentRect.hi.x << ParentRect.hi.y;

        // Save the size of this view window.
        ar << ViewRect.lo.x << ViewRect.lo.y
           << ViewRect.hi.x << ViewRect.hi.y;

        // Save the position of this view when an icon.
        ar << IconPoint.x << IconPoint.y;

        // Save the scroller position.
        INT32 dwHigh;
        UINT32 dwLow;
        ScrollPosition.x.GetHighLow(&dwHigh, &dwLow);
        ar << dwHigh << dwLow;
        ScrollPosition.y.GetHighLow(&dwHigh, &dwLow);
        ar << dwHigh << dwLow;

        // Save the zoom scaling factor.  For now, this must be done by casting it
        // into a double, until Andy lets me change fixed16.h
        ar << ViewScale.MakeDouble();

        // Save the "state" of this view, ie. Is it an icon?  Is it top-most? etc.
        ar << INT32(IsMinimised) << INT32(IsMaximised) << INT32(HasFocus)
           << INT32(AlwaysOnTop);
    }
    else
    {
        // Load the previous size of the screen.
        ar >> ScreenRect.lo.x >> ScreenRect.lo.y
           >> ScreenRect.hi.x >> ScreenRect.hi.y;

        // Load the size of the parent (MDI) frame window.
        ar >> ParentRect.lo.x >> ParentRect.lo.y
           >> ParentRect.hi.x >> ParentRect.hi.y;

        // Load the size of this view window.
        ar >> ViewRect.lo.x >> ViewRect.lo.y
           >> ViewRect.hi.x >> ViewRect.hi.y;

        // Load the position of this view when an icon.
        ar >> IconPoint.x >> IconPoint.y;

        // Load the scroller position.
        INT32 dwHigh;
        UINT32 dwLow;
        ar >> dwHigh >> dwLow;
        ScrollPosition.x.SetHighLow(dwHigh, dwLow);
        ar >> dwHigh >> dwLow;
        ScrollPosition.y.SetHighLow(dwHigh, dwLow);

        // Load the scale factor, which was serialized as a double.
        double fp;
        ar >> fp;
        ViewScale = (FIXED16) fp;

        // Load the "state" of this view, ie. Is it an icon?  Is it top-most? etc
        INT32 a, b, c, d;
        ar >> a >> b >> c >> d;
        IsMinimised = (BOOL) a;
        IsMaximised = (BOOL) b;
        HasFocus    = (BOOL) c;
        AlwaysOnTop = (BOOL) d;
        
        // Finally, indicate that this is not a new view that has a default size etc
        // but an old one, so it should be set to match the data in the ViewState.
        IsNewView = FALSE;
    }
}

*/


#ifdef _DEBUG

void ViewState::Dump() const
{
    TCHAR              *pszTrue = wxT("TRUE"), *pszFalse = wxT("FALSE");

    TRACE( wxT("\nDUMP OF VIEWSTATE AT 0x%lX\n"), this );

    // Window attributes.
    TRACE( _T("\tScreenRect:\t\tlow = (%ld, %ld)\t\thigh = (%ld, %ld)\n"),
          ScreenRect.lo.x, ScreenRect.lo.y, ScreenRect.hi.x, ScreenRect.hi.y);
    TRACE( _T("\tParentRect:\t\tlow = (%ld, %ld)\t\thigh = (%ld, %ld)\n"),
          ParentRect.lo.x, ParentRect.lo.y, ParentRect.hi.x, ParentRect.hi.y);
    TRACE( _T("\tViewRect:\t\tlow = (%ld, %ld)\t\thigh = (%ld, %ld)\n"),
          ViewRect.lo.x, ViewRect.lo.y, ViewRect.hi.x, ViewRect.hi.y);
    TRACE( _T("\tIconPoint:\t\t(%ld, %ld)\n"), IconPoint.x, IconPoint.y);
    TRACE( _T("\tIsNewView:\t\t%s\n"), (IsNewView ? pszTrue : pszFalse));
    TRACE( _T("\tIsMinimised:\t%s\n"), (IsMinimised ? pszTrue : pszFalse));
    TRACE( _T("\tIsMaximised:\t%s\n"), (IsMaximised ? pszTrue : pszFalse));
    TRACE( _T("\tAlwaysOnTop:\t%s\n"), (AlwaysOnTop ? pszTrue : pszFalse));

    // Document view attributes.
    TRACE( _T("\tWork-Area Ext:\t(%ld, %ld)  -->  (%ld, %ld)\n"),
          INT32(WorkAreaExtent.lo.x), INT32(WorkAreaExtent.lo.y),
          INT32(WorkAreaExtent.hi.x), INT32(WorkAreaExtent.hi.y) );
    TRACE( _T("\tScroll Offset:\t(%ld, %ld)\n"),
          INT32(ScrollPosition.x), INT32(ScrollPosition.y) );
//  TRACE( _T("\tPixel Width:\t%ld\n\tPixelHeight:\t%ld\n"), PixelWidth, PixelHeight);
}

#endif

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