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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // NodeEllipse - The Ellipse Class /* */ #include "camtypes.h" #include "nodeelip.h" //#include "app.h" #include "aw_eps.h" #include "blobs.h" //#include "docview.h" - in camtypes.h [AUTOMATICALLY REMOVED] //#include "opsmpshp.h" //#include "osrndrgn.h" //#include "rik.h" DECLARE_SOURCE( "$Revision: 1315 $" ); // Declare this class and give my name for bad memory handling CC_IMPLEMENT_DYNCREATE(NodeEllipse, NodeSimpleShape) // Declare smart memory handling in Debug builds #define new CAM_DEBUG_NEW /*********************************************************************************************** > NodeEllipse::NodeEllipse( Node* ContextNode, AttachNodeDirection Direction, BOOL Locked, BOOL Mangled, BOOL Marked, BOOL Selected ) Author: Rik_Heywood (Xara Group Ltd) Created: 1/6/94 Inputs: ContextNode - Pointer to a node which this node is to be attached to. Direction - Specifies the direction in which the node is to be attached to the ContextNode. BoundingRect - The Bounding rectangle Purpose: This constructor initialises the nodes flags and links it to ContextNode in the direction specified by Direction. All neccesary tree links are updated. Note: SetUpPath() must be called before the NodeRect is in a state in which it can be used. SeeAlso: SetUpPath Errors: An assertion error will occur if ContextNode is NULL ***********************************************************************************************/ NodeEllipse::NodeEllipse( Node* ContextNode, AttachNodeDirection Direction, BOOL Locked, BOOL Mangled, BOOL Marked, BOOL Selected ):NodeSimpleShape(ContextNode, Direction, Locked, Mangled, Marked, Selected ) { } /********************************************************************************************* > NodeEllipse::NodeEllipse() Author: Mario_Shamtani (Xara Group Ltd) Created: 1/6/94 Purpose: This constructor creates a NodeRect linked to no other with all status flags false and an uninitialized bounding rectangle. Note: SetUpPath() must be called before the NodeRect is in a state in which it can be used. SeeAlso: SetUpPath **********************************************************************************************/ /* Technical Notes: The default constructor is required so that SimpleCopy will work */ NodeEllipse::NodeEllipse(): NodeSimpleShape() { } /*********************************************************************************************** > virtual Node* NodeEllipse::SimpleCopy() Author: Rik_Heywood (Xara Group Ltd) Created: 26/5/93 Returns: Pointer to a Node Purpose: Makes a copy of all the data in the node ***********************************************************************************************/ Node* NodeEllipse::SimpleCopy() { // Make a new NodeSimpleShape and then copy things into it NodeEllipse* NodeCopy = new NodeEllipse(); if (NodeCopy) CopyNodeContents(NodeCopy); return NodeCopy; } /******************************************************************************************** > virtual String NodeEllipse::Describe(BOOL Plural, BOOL Verbose = TRUE) Author: Rik_Heywood (Xara Group Ltd) Created: 1/6/94 Inputs: Plural: Flag indicating if the string description should be plural or singular. Retuns: Description of the object Purpose: To return a description of the NodeRect object in either the singular or the plural. This method is called by the DescribeRange method. The description will always begin with a lower case letter. Errors: A resource exception will be thrown if a problem occurs when loading the string resource. ********************************************************************************************/ String NodeEllipse::Describe(BOOL Plural, BOOL Verbose) { if (Plural) return(String(_R(IDS_ELLIPSE_DESCRP))); else return(String(_R(IDS_ELLIPSE_DESCRS))); } /******************************************************************************************** > void NodeEllipse::PreExportRender(RenderRegion* pRegion) Author: Tim_Browse (Xara Group Ltd) Created: 17/08/94 Inputs: pRegion - the render region we are exporting to. Purpose: Output data required to mark this object as an ellipse, as opposed to an arbitrary path. ********************************************************************************************/ void NodeEllipse::PreExportRender(RenderRegion* pRegion) { #ifdef DO_EXPORT if (pRegion->IsKindOf(CC_RUNTIME_CLASS(ArtWorksEPSRenderRegion))) { // Output "ArtWorks ellipse" token EPSExportDC *pDC = (EPSExportDC *) pRegion->GetRenderDC(); // Output the 3 coords defining the ellipse's bounding parallelogram pDC->OutputCoord(Parallel[0]); pDC->OutputCoord(Parallel[1]); pDC->OutputCoord(Parallel[2]); // And the token itself pDC->OutputToken(_T("ae")); pDC->OutputNewLine(); } #endif } /*********************************************************************************************** > virtual void NodeEllipse::CreateShape(DocRect NewRect) Author: Rik_Heywood (Xara Group Ltd) Created: 1/6/94 Inputs: DocRect - representing the rectangle to create the shape in Purpose: Creates an Ellipse using a path that fills the rectangle specified. ***********************************************************************************************/ void NodeEllipse::CreateShape(DocRect NewRect) { // Copy the rectangle into the parallelogram Parallel[0] = DocCoord(NewRect.lo.x, NewRect.hi.y); Parallel[1] = DocCoord(NewRect.hi.x, NewRect.hi.y); Parallel[2] = DocCoord(NewRect.hi.x, NewRect.lo.y); Parallel[3] = DocCoord(NewRect.lo.x, NewRect.lo.y); // Get an array to put the 12 different coords needed to specify an ellipse DocCoord NewCoords[12]; // Calculate the 3 coordinates along each side of the parallelogram CalcEllipseEdge(Parallel[0], Parallel[1], &NewCoords[11], &NewCoords[0], &NewCoords[1]); CalcEllipseEdge(Parallel[1], Parallel[2], &NewCoords[2], &NewCoords[3], &NewCoords[4]); CalcEllipseEdge(Parallel[2], Parallel[3], &NewCoords[5], &NewCoords[6], &NewCoords[7]); CalcEllipseEdge(Parallel[3], Parallel[0], &NewCoords[8], &NewCoords[9], &NewCoords[10]); // build a path InkPath.ClearPath(); InkPath.FindStartOfPath(); // Start at bottom left corner PathFlags NewFlags; NewFlags.IsRotate = TRUE; InkPath.InsertMoveTo(NewCoords[0], &NewFlags); InkPath.InsertCurveTo(NewCoords[1], NewCoords[2], NewCoords[3], &NewFlags); InkPath.InsertCurveTo(NewCoords[4], NewCoords[5], NewCoords[6], &NewFlags); InkPath.InsertCurveTo(NewCoords[7], NewCoords[8], NewCoords[9], &NewFlags); InkPath.InsertCurveTo(NewCoords[10], NewCoords[11], NewCoords[0], &NewFlags); // Close the path properly InkPath.CloseSubPath(); } /*********************************************************************************************** > virtual void NodeEllipse::UpdateShape() Author: Rik_Heywood (Xara Group Ltd) Created: 1/6/94 Purpose: Updates Ellipse node to fit the current parallelogram ***********************************************************************************************/ void NodeEllipse::UpdateShape() { // make sure the path seems to have the correct number of coords in it ENSURE(InkPath.GetNumCoords()==13, "NodeEllipse::UpdateShape found its path corrupt" ); // Get the array of coords in the path DocCoord* Coords = InkPath.GetCoordArray(); // Update them to what we now have CalcEllipseEdge(Parallel[0], Parallel[1], &Coords[11], &Coords[0], &Coords[1]); CalcEllipseEdge(Parallel[1], Parallel[2], &Coords[2], &Coords[3], &Coords[4]); CalcEllipseEdge(Parallel[2], Parallel[3], &Coords[5], &Coords[6], &Coords[7]); CalcEllipseEdge(Parallel[3], Parallel[0], &Coords[8], &Coords[9], &Coords[10]); Coords[12] = Coords[0]; } /******************************************************************************************** > void NodeEllipse::CalcEllipseEdge(DocCoord& P0, DocCoord& P1, DocCoord* NewCoordA, DocCoord* NewCoordB, DocCoord* NewCoordC) Author: Rik_Heywood (Xara Group Ltd) Created: 1/6/94 Inputs: P0 - The First Corner of the parallelogram P1 - The Second Corner of the parallelogram Outputs: NewCoordA - The coord of the Bezier control point closest to P0 NewCoordB - The coord of the Bezier Endpoint that is midway between P1 & P1 NewCoordC - The coord of the Bezier control point closest to P1 Purpose: This function is used to fit an Ellipse inside a parallelogram using Bezier Curves. Along each side of the parallelogram there will be 3 coordinates (an Endpoint and 2 control points). This function calculate the 3 coordinates along a single side of the parallelogram (to calc all the control points the function would need to be called 4 times). The Coords P1 and P1 are assumed to be adjacent coordinates of the parallelogram. The maths for calculating coordinates for Rounded Rectangles is very similar. I have made optimisations in this function as not as much maths is needed. For a full description of the maths used here see the document Camelot/doc/ellipse.doc ********************************************************************************************/ void NodeEllipse::CalcEllipseEdge(const DocCoord& P0, const DocCoord& P1, DocCoord* NewCoordA, DocCoord* NewCoordB, DocCoord* NewCoordC) { // Do the maths. This is described in the document camelot\docs\ellipse.doc // Find the length of the first side (pythag) INT32 dx = P1.x - P0.x; INT32 dy = P1.y - P0.y; //double SideLength = sqrt(dx*dx + dy*dy); //ENSURE(SideLength!=0.0, "CalcEllipseEdge was thinking of doing a div 0!"); // This would be different if we were calculating a rounded rectangle //double ArcRadius = SideLength / 2.0; //double ControlDist = ArcRadius/(SideLength*2.2336); // This is equivalent to the above 2 lines, only less maths is needed // (ie none as the compiler should do it) double ControlDist = 1.0 / (2 * 2.2336); // Find the control point closest to P0 NewCoordA->x = (INT32) (P0.x + (dx * ControlDist)); NewCoordA->y = (INT32) (P0.y + (dy * ControlDist)); // Find the mid point of the side, for the middle control point NewCoordB->x = (INT32) (P0.x + (dx / 2)); NewCoordB->y = (INT32) (P0.y + (dy / 2)); // Find the Control point closest to p1 NewCoordC->x = (INT32) (P1.x - dx * ControlDist); NewCoordC->y = (INT32) (P1.y - dy * ControlDist); } /******************************************************************************************** > DocRect NodeEllipse::GetBlobBoundingRect() Author: Rik_Heywood (Xara Group Ltd) Created: 4/11/94 Returns: The bounding rect of the Ellipse and its blobs Purpose: Calculates the ellipses bounding rect along with its blobs ********************************************************************************************/ DocRect NodeEllipse::GetBlobBoundingRect() { #if !defined(EXCLUDE_FROM_RALPH) // Find the paths bounding rectangle DocRect ShapeRect = GetBoundingRect(); DocRect Rect(Parallel[0], Parallel[0]); Rect.IncludePoint(Parallel[1]); Rect.IncludePoint(Parallel[2]); Rect.IncludePoint(Parallel[3]); // Find the blob manager BlobManager* pBlobMgr = GetApplication()->GetBlobManager(); // Get a rect to put the extra rectangle on DocRect BlobRect; // Get the rect round a blob in the corner of the ellipse and add it to the total DocCoord Corner = Rect.HighCorner(); pBlobMgr->GetBlobRect(Corner, &BlobRect); Rect = Rect.Union(BlobRect); // and the same with the other corner Corner = Rect.LowCorner(); pBlobMgr->GetBlobRect(Corner, &BlobRect); Rect = Rect.Union(BlobRect); // and union it with the rect of the shape or things like Linewidth get in the way Rect = Rect.Union(ShapeRect); // Make sure we include the Bounds of our children IncludeChildrensBoundingRects(&Rect); // return the rectangle with the blobs included return Rect; #else return DocRect(0,0,0,0); #endif } /******************************************************************************************** > virtual UINT32 NodeEllipse::GetNodeSize() const Author: Rik_Heywood (Xara Group Ltd) Created: 1/6/94 Returns: The size of the node in bytes Purpose: For finding the size of the node SeeAlso: Node::GetSubtreeSize ********************************************************************************************/ UINT32 NodeEllipse::GetNodeSize() const { return (sizeof(NodeEllipse)); } /******************************************************************************************** > virtual void NodeEllipse::HandleBlobDrag(DocCoord& PointerPos, Spread* pSpread, INT32 FixedCorner) Author: Rik_Heywood (Xara Group Ltd) Created: 2/6/94 Inputs: PointerPos - The position the mouse pointer clicked pSpread - the spread that the click was on FixedCorner - The corner of the parallelogram that will stay fixed during the drag Purpose: When a drag is started on one of the paths blobs this is called. It tries to fire up an operation that will perform a drag of all the selected points, including all the EORing of the relavent parts of the curve. If it fails it will inform the user and not bother. ********************************************************************************************/ void NodeEllipse::HandleBlobDrag(DocCoord& PointerPos, Spread* pSpread, INT32 FixedCorner) { /* OpEditEllipse* pOp = new OpEditEllipse; if (pOp==NULL) { // Failed to get the memory to do the job if (IsUserName( "Rik" )) TRACE( _T("The Node Ellipse Edit Operation failed to start\n") ); // Inform the person doing the clicking that life is not looking so good InformError(); } else { // Start the drag operation and pass in the Anchor Point to the operation pOp->DoDrag(PointerPos, pSpread, this, FixedCorner); }*/ }