sgstroke.cpp

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// $Id: sgstroke.cpp 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
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              respective authors. See AUTHORS file for details.

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

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 */
// SGStroke.cpp - definitions for line gallery classes for handling new-style Stroke attributes

#include "camtypes.h"

#include "sgstroke.h"

//#include "app.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "lineattr.h"
//#include "paths.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "ppstroke.h"
//#include "rndrgn.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "strkattr.h"

#include "dlgcol.h"

#include "qualattr.h"
#include "ppvecstr.h"

#include "ndoptmz.h"
//#include "rik.h"
#include "brushmsg.h"

CC_IMPLEMENT_DYNAMIC(StrokeTypeItem, LineAttrItem);
CC_IMPLEMENT_DYNAMIC(VarWidthItem,   LineAttrItem);


#define new CAM_DEBUG_NEW


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

>   StrokeTypeItem::StrokeTypeItem(StrokeTypeAttrValue *pStroke, const String &strDescription)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     pStroke         - a pointer to an attribute to be used for this
                                  stroke type. This now belongs to the StrokeTypeItem,
                                  so you must not delete it
                strDescription  - a text description of this user-interface item
    Outputs:    -
    Returns:    -
    Purpose:    Constructs a user-interface item representing a stroke type

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

StrokeTypeItem::StrokeTypeItem(StrokeTypeAttrValue *pStroke, const String &strDescription)
              : LineAttrItem(strDescription, BELOW)
{
    ERROR3IF(pStroke == NULL, "Illegal NULL param");
    pStrokeDef = pStroke;
}



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

>   StrokeTypeItem::~StrokeTypeItem()

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Purpose:    Destructor

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

StrokeTypeItem::~StrokeTypeItem()
{
    if (pStrokeDef != NULL)
        delete pStrokeDef;
}



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

>   virtual void StrokeTypeItem::SetAttributes(RenderRegion* pRegion) const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Inputs:     pRegion - the render-region to draw into

    Purpose:    Sets the stroke typeattributes in the given render-region to render this
                item correctly.

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

void StrokeTypeItem::SetAttributes(RenderRegion* pRegion) const
{
    // Set a 16pt line width - nice & thick
    pRegion->SetLineWidth(16000);

    // Set the line width (this overrides the "default" line width set by the caller).
    pStrokeDef->Render(pRegion, FALSE);
}



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

>   virtual NodeAttribute *StrokeTypeItem::CreateNewAttribute(BOOL) const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Returns:    A pointer to a NodeAttribute-derivative that this user-interface item
                represents, ie. a line-width attribute that can be passed to the
                attribute manager.

    Purpose:    Create a NodeAttribute representing the attribute this item applies

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

NodeAttribute *StrokeTypeItem::CreateNewAttribute(BOOL) const
{
    return(pStrokeDef->MakeNode());
}



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

>   virtual MILLIPOINT StrokeTypeItem::GetWidth() const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     -
    Outputs:    -
    Returns:    The width of a line-width item, in millipoints.
    Purpose:    Called by the line gallery formatting code.

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

MILLIPOINT StrokeTypeItem::GetWidth() const
{
    return 2 * LineAttrItem::GetWidth() / 3;
}



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

>   virtual CCRuntimeClass** StrokeTypeItem::GetAttribRuntimeClasses() const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     -
    Outputs:    -
    Returns:    The run-time class of the line attribute this type of display item
                represents.
    Purpose:    Used when searching for display items representing the selection's current
                attributes.

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

CCRuntimeClass** StrokeTypeItem::GetAttribRuntimeClasses() const
{
    static CCRuntimeClass* aprtc[] =
    {
        CC_RUNTIME_CLASS(AttrStrokeType),
        NULL
    };

    return aprtc;
}



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

>   virtual BOOL StrokeTypeItem::IsEqualValueToAny(NodeAttribute** ppOtherAttribs) const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     pOtherAttrib        the attribute value to compare this item to
    Outputs:    -
    Returns:    TRUE if this item represents the same attribute value as the given
                attribute.
    Purpose:    Used when searching for display items representing the selection's current
                attributes.

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

BOOL StrokeTypeItem::IsEqualValueToAny(NodeAttribute** ppOtherAttribs) const
{
    if (*ppOtherAttribs == NULL)    // When multiple attribs are selected, this will be NULL
        return(FALSE);

    AttrStrokeType* pAttr = (AttrStrokeType *) *ppOtherAttribs;
    ERROR3IF(!pAttr->IsKindOf(CC_RUNTIME_CLASS(AttrStrokeType)),
                "StrokeTypeItem::IsEqualValueToAny - unexpected object type");

    if (pAttr != NULL)
    {
        StrokeTypeAttrValue *pOther = (StrokeTypeAttrValue *) pAttr->GetAttributeValue();
        return((*pStrokeDef) == (*pOther));
    }

    return(FALSE);
}



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

>   virtual MILLIPOINT StrokeTypeItem::GetHorzGap() const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Returns:    The horizontal gap between this item and another item of the same type, in
                millipoints.
    Purpose:    Called by the formatting code to determine the gap between items of this type

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

MILLIPOINT StrokeTypeItem::GetHorzGap() const
{
    // I would like the gap to be the same all the way around
    return(GetVertGap());
}


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

>   virtual BOOL StrokeTypeItem::IsRepeating()

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Returns:    TRUE if the stroke is a repeating stroke.
    Purpose:    Determins if the stroke repeats

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

BOOL StrokeTypeItem::IsRepeating()
{
    BOOL Repeating = FALSE;
    StrokeDefinition *pStroke = GetStrokeDefinition();
    if (pStroke != NULL)
    {
        Repeating = pStroke->IsRepeating();
    }

    return Repeating;
}

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

>   virtual INT32 StrokeTypeItem::NumRepeats()

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Returns:    Number of times the brush should be repeated along the line. If 0, then we
                work out the best based on the aspect ratio and line thickness.
    Purpose:    See Returns.

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

INT32 StrokeTypeItem::NumRepeats()
{
    INT32 Repeats = 0;
    StrokeDefinition *pStroke = GetStrokeDefinition();
    if (pStroke != NULL)
    {
        Repeats = pStroke->NumRepeats();
    }

    return Repeats;
}

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

>   virtual BOOL StrokeTypeItem::OverridesFill()

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Returns:    TRUE if the stroke's overrides fill flag is set
    Purpose:    Determins if the stroke overrides the fill or not

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

BOOL StrokeTypeItem::OverridesFill()
{
    BOOL OverridesFill = FALSE;
    StrokeDefinition *pStroke = GetStrokeDefinition();
    if (pStroke != NULL)
    {
        OverridesFill = pStroke->OverrideFill();
    }

    return OverridesFill;
}

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

>   virtual BOOL StrokeTypeItem::OverridesTrans()

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Returns:    TRUE if the stroke's overrides transparency flag is set
    Purpose:    Determins if the stroke overrides transparency or not

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

BOOL StrokeTypeItem::OverridesTrans()
{
    BOOL OverridesTrans = FALSE;
    StrokeDefinition *pStroke = GetStrokeDefinition();
    if (pStroke != NULL)
    {
        OverridesTrans = pStroke->OverrideTrans();
    }

    return OverridesTrans;
}

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

>   virtual StrokeDefinition *StrokeTypeItem::GetStrokeDefinition()

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Returns:    The StrokeDefinition for this item
    Purpose:    Get the StrokeDefinition for this item

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

StrokeDefinition *StrokeTypeItem::GetStrokeDefinition()
{
    StrokeHandle Handle = GetStrokeHandle();
    if(Handle != StrokeHandle(-1))
        return StrokeComponent::FindStroke(Handle);

    return NULL;
}

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

>   virtual StrokeHandle StrokeTypeItem::GetStrokeHandle()

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Returns:    The StrokeHandle for this item, or StrokeHandle_NoStroke if strife
    Purpose:    Get the StrokeHandle for this item

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

StrokeHandle StrokeTypeItem::GetStrokeHandle()
{
    StrokeTypeAttrValue *pAttrValue = GetStrokeTypeAttrValue();
    if(pAttrValue != NULL)
    {
        PathProcessorStroke *pProcessor = pAttrValue->GetPathProcessor();
        if (pProcessor != NULL && pProcessor->IsKindOf(CC_RUNTIME_CLASS(PathProcessorStrokeVector)))
        {
            StrokeHandle Handle = ((PathProcessorStrokeVector *)pProcessor)->GetStrokeDefinition();
            return Handle;
        }
    }

    return StrokeHandle_NoStroke;
}


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

>   virtual void StrokeTypeItem::RenderItem(RenderRegion *pRender, DocRect *pDocRect)

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Inputs:     pRender     - RenderRegion to render into
                pDocRect    - Rectangle to render

    Purpose:    Renders a representation of the stroke into the given renderregion. This
                is used by the line properties dialog since all the stuff needed seems to
                be private...

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

void StrokeTypeItem::RenderItem(RenderRegion *pRender, DocRect *pDocRect, INT32 Width)
{
    if(pRender == NULL || pDocRect == NULL)
    {
        ERROR3("StrokeTypeItem::RenderItem given null params");
        return;
    }

    pRender->SaveContext();

    // Make sure we're anti-aliasing
    Quality             AntiAliasQuality(Quality::QualityMax);
    QualityAttribute    AntiAliasQualityAttr(AntiAliasQuality);
    pRender->SetQuality(&AntiAliasQualityAttr,FALSE);

    // Render the background rectangle
    DialogColourInfo RedrawColours;
    pRender->SetLineColour(RedrawColours.DialogBack());
    pRender->SetFillColour(RedrawColours.DialogBack());
    pRender->DrawRect(pDocRect);

    // Draw the Saturation vs. Value square
    Path SquarePath;
    LinearFillAttribute ValueGradFill;
    LinearTranspFillAttribute TransFill;

    ValueGradFill.Colour    = DocColour(255L, 0L, 0L);
    ValueGradFill.EndColour = DocColour(255L, 255L, 255L);

    DocCoord ThePoint(pDocRect->lo.x, pDocRect->hi.y);
    ValueGradFill.SetStartPoint(&ThePoint);
    ThePoint = DocCoord(pDocRect->hi.x, pDocRect->hi.y);
    ValueGradFill.SetEndPoint(&ThePoint);
    ValueGradFill.SetEndPoint2(NULL);

    pRender->SetFillGeometry(&ValueGradFill, FALSE);            // Set Grad-filled

    //pRender->DrawRect(pDocRect);

/*      SquarePath.Initialise(12, 12);
        SquarePath.FindStartOfPath();

        SquarePath.InsertMoveTo(ValSatSquare.lo);
        SquarePath.InsertLineTo(DocCoord(ValSatSquare.hi.x, ValSatSquare.lo.y));
        SquarePath.InsertLineTo(ValSatSquare.hi);
        SquarePath.InsertLineTo(DocCoord(ValSatSquare.lo.x, ValSatSquare.hi.y));
        SquarePath.IsFilled = TRUE;

        pRender->DrawPath(&SquarePath);     // Render the value square

        // Render a white linear-grad-transparency square over the top to get the
        // effect of the Saturation gradient
        pRender->SetFillColour(DocColour(0L, 0L, 0L));

        // Set transparency to circular 0% at center, 100% at radius, && plot it
        TransFill.SetStartPoint(&ValSatSquare.hi);
        ThePoint = DocCoord(ValSatSquare.hi.x, ValSatSquare.lo.y);
        TransFill.SetEndPoint(&ThePoint);
        TransFill.SetEndPoint2(NULL);
        TransFill.Transp        = 255;
        TransFill.EndTransp     = 0;
        TransFill.TranspType    = 2;        // 'Stained glass' transparency

        pRender->SetTranspFillGeometry(&TransFill, FALSE);
  */


    pRender->SetLineColour(RedrawColours.TextFore());

    SetAttributes(pRender);
    pRender->SetLineWidth((INT32)((double)Width * 0.8));
    DrawItem(pRender, *pDocRect);

    pRender->RestoreContext();
}



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

>   virtual void StrokeTypeItem::UpdateGalleryItem()

    Author:     Richard_Millican (Xara Group Ltd) <camelotdev@xara.com>
    Created:    6/3/97

    Purpose:    Updates the gallery item's cached data to represent any changes this 
                Stoke might have had done to it. Also redraw the gallery if necessary.

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

void StrokeTypeItem::UpdateGalleryItem()
{
    StrokeDefinition *pStroke = GetStrokeDefinition();
    if(pStroke != NULL)
    {
        SetDescription(pStroke->GetStrokeName());
    }

    ForceRedrawOfMyself();
}






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

>   VarWidthItem::VarWidthItem(VariableWidthAttrValue *pAttr, const String &strDescription)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     pAttr           - a pointer to an attribute to be used for this
                                  stroke type. This now belongs to the VarWidthItem,
                                  so you must not delete it
                strDescription  - a text description of this user-interface item
    Outputs:    -
    Returns:    -
    Purpose:    Constructs a user-interface item representing a stroke type

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

VarWidthItem::VarWidthItem(VariableWidthAttrValue *pAttr, const String &strDescription)
              : LineAttrItem(strDescription, BELOW)
{
    ERROR3IF(pAttr == NULL, "Illegal NULL param");
    pAttrDef = pAttr;
}



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

>   StrokeTypeItem::~StrokeTypeItem()

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Purpose:    Destructor

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

VarWidthItem::~VarWidthItem()
{
    if (pAttrDef != NULL)
        delete pAttrDef;
}



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

>   virtual void VarWidthItem::SetAttributes(RenderRegion* pRegion) const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Inputs:     pRegion - the render-region to draw into

    Purpose:    Sets the stroke typeattributes in the given render-region to render this
                item correctly.

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

void VarWidthItem::SetAttributes(RenderRegion* pRegion) const
{
    // Set a 16pt line width - nice & thick
    pRegion->SetLineWidth(16000);

    // Set the line width (this overrides the "default" line width set by the caller).
    pAttrDef->Render(pRegion, FALSE);

    // Set a path processor up so that the variable line width is used when stroking
    StrokeTypeAttrValue *pStroke = new StrokeTypeAttrValue(new PathProcessorStroke);
    if (pStroke != NULL)
        pStroke->Render(pRegion, TRUE);
}



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

>   virtual NodeAttribute *VarWidthItem::CreateNewAttribute(BOOL) const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Returns:    A pointer to a NodeAttribute-derivative that this user-interface item
                represents, ie. a line-width attribute that can be passed to the
                attribute manager.

    Purpose:    Create a NodeAttribute representing the attribute this item applies

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

NodeAttribute *VarWidthItem::CreateNewAttribute(BOOL) const
{
    return(pAttrDef->MakeNode());
}



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

>   virtual MILLIPOINT VarWidthItem::GetWidth() const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     -
    Outputs:    -
    Returns:    The width of a line-width item, in millipoints.
    Purpose:    Called by the line gallery formatting code.

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

MILLIPOINT VarWidthItem::GetWidth() const
{
    return 2 * LineAttrItem::GetWidth() / 3;
}



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

>   virtual CCRuntimeClass** VarWidthItem::GetAttribRuntimeClasses() const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     -
    Outputs:    -
    Returns:    The run-time class of the line attribute this type of display item
                represents.
    Purpose:    Used when searching for display items representing the selection's current
                attributes.

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

CCRuntimeClass** VarWidthItem::GetAttribRuntimeClasses() const
{
    static CCRuntimeClass* aprtc[] =
    {
        CC_RUNTIME_CLASS(AttrVariableWidth),
        NULL
    };

    return aprtc;
}



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

>   virtual BOOL VarWidthItem::IsEqualValueToAny(NodeAttribute** ppOtherAttribs) const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97
    Inputs:     pOtherAttrib        the attribute value to compare this item to
    Outputs:    -
    Returns:    TRUE if this item represents the same attribute value as the given
                attribute.
    Purpose:    Used when searching for display items representing the selection's current
                attributes.

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

BOOL VarWidthItem::IsEqualValueToAny(NodeAttribute** ppOtherAttribs) const
{
    if (*ppOtherAttribs == NULL)
        return(FALSE);

    AttrVariableWidth* pAttr = (AttrVariableWidth *) *ppOtherAttribs;
    ERROR3IF(!pAttr->IsKindOf(CC_RUNTIME_CLASS(AttrVariableWidth)),
                "VarWidthItem::IsEqualValueToAny - unexpected object type");

    if (pAttr != NULL)
    {
        VariableWidthAttrValue *pOther = (VariableWidthAttrValue *) pAttr->GetAttributeValue();
        return((*pAttrDef) == (*pOther));
    }

    return(FALSE);
}



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

>   virtual MILLIPOINT VarWidthItem::GetHorzGap() const

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/3/97

    Returns:    The horizontal gap between this item and another item of the same type, in
                millipoints.
    Purpose:    Called by the formatting code to determine the gap between items of this type

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

MILLIPOINT VarWidthItem::GetHorzGap() const
{
    // I would like the gap to be the same all the way around
    return(GetVertGap());
}


/********************************************************************************************
>   virtual BOOL LineAttrItem::ItemSelected() 

    Author:     Diccon_Yamanaka (Xara Group Ltd) <camelotdev@xara.com>
    Created:    20/1/2000
    Inputs:     pNewAttr - the attribute that we are about to apply
    Outputs:    -
    Returns:    TRUE if we want the line gallery to go ahead and apply the attribute, 
                FALSE if we applied it ourselves.
    Purpose:    utility fn called when the item is selected.  As we now wish to apply both the
                stroke type item and the variable width item through one UI action we must 
                do so here.
    Notes:      This was implemented so that the user could apply a variable width stroke with
                just one click.  As we have abaondoned the idea of keeping the different stroke
                types for this release it has been decided that we will only have the basic
                stroke type which will automatically be applied when you select a variable width
********************************************************************************************/

BOOL VarWidthItem::ItemSelected(NodeAttribute* pAttribute)
{
    if (pAttribute == NULL || !pAttribute->IsKindOf(CC_RUNTIME_CLASS(AttrVariableWidth)))
    {
        ERROR3("Invalid attribute in VarWidthItem::ItemSelected");
        return FALSE;
    }

    // if we're applying a default then we should also apply an old-style stroke so...
    PathProcessorStroke* PPS = NULL;
    VariableWidthAttrValue* pVal = (VariableWidthAttrValue*)pAttribute->GetAttributeValue();
    if (pVal->GetWidthFunction() != NULL)
    {
        // If not a default then create the PathProcessor for the stroke attribute
        // The default case will fall through with NULL and create an old-style stroke
        PPS = new PathProcessorStroke;
        if (PPS == NULL)
            return FALSE;
    }

    StrokeTypeAttrValue NewStroke(PPS);
    AttrStrokeType* pAttrStroke = (AttrStrokeType*)NewStroke.MakeNode();

    if (pAttrStroke == NULL)
        return FALSE;

    List AttribsList;
    NodeAttributePtrItem* pStrokeAttrPtr = new NodeAttributePtrItem;
    if (pStrokeAttrPtr == NULL)
    {
        delete pAttrStroke;
        return TRUE;
    }
    pStrokeAttrPtr->NodeAttribPtr = pAttrStroke;

    // in order to apply the attributes simultaneously we need a list
    AttribsList.AddHead(pStrokeAttrPtr);

    NodeAttributePtrItem* pVarWidthPtr = new NodeAttributePtrItem;
    if (pVarWidthPtr == NULL)
    {
        pStrokeAttrPtr->NodeAttribPtr = NULL;
        delete pAttrStroke;
        delete pStrokeAttrPtr;
        return TRUE;
    }
    pVarWidthPtr->NodeAttribPtr = pAttribute;

    AttribsList.AddHead(pVarWidthPtr);

    AttributeManager::AttributesSelected(AttribsList, _R(IDS_STROKEAPPLY_UNDO));

    // We don't need the list of attrs anymore
    NodeAttributePtrItem* pAttrItem = (NodeAttributePtrItem*)AttribsList.GetHead();
    while (pAttrItem)
    {
        delete (pAttrItem->NodeAttribPtr);
        pAttrItem->NodeAttribPtr = NULL;
        pAttrItem = (NodeAttributePtrItem*)AttribsList.GetNext(pAttrItem);
    }
    AttribsList.DeleteAll(); // tidyup  

    BROADCAST_TO_ALL(StrokeMsg());
    return FALSE; // means do not go ahead and apply pAttribute again
}

---