opsmooth.cpp

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

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 */
// Implementation file for operation to smooth whole paths
// or between selected points

/*
*/

#include "camtypes.h"
//#include "resource.h"
//#include "barsdlgs.h" 
//#include "mike.h"
//#include "ops.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "opsmooth.h"
//#include "app.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "document.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "nodepath.h"
#include "ophist.h"
//#include "jim.h"

DECLARE_SOURCE("$Revision: 1282 $");
CC_IMPLEMENT_DYNCREATE( OpSmoothSelection, SelOperation )

#define new CAM_DEBUG_NEW


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

>   OpSmoothSelection::OpSmoothSelection() 

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:    20/10/94
    Purpose:    OpSmoothSelection() constructor
    SeeAlso:    -

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

OpSmoothSelection::OpSmoothSelection()
{
    // Dummy constructor
}
  


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

>   BOOL OpSmoothSelection::Init()

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:    26/7/94
    Inputs:     -
    Outputs:    -
    Returns:    TRUE if the operation could be successfully initialised 
                FALSE if no more memory could be allocated 
                
    Purpose:    OpDeletePoints initialiser method
    Errors:     ERROR will be called if there was insufficient memory to allocate the 
                operation.
    SeeAlso:    -

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

BOOL OpSmoothSelection::Init()
{
    return (RegisterOpDescriptor(0,                                 // tool ID
                                _R(IDS_SMOOTHSELECTIONOP),              // string resource ID
                                CC_RUNTIME_CLASS(OpSmoothSelection),// runtime class for Op
                                OPTOKEN_SMOOTHSELECTION,            // Ptr to token string
                                OpSmoothSelection::GetState,        // GetState function
                                0,                                  // help ID
                                _R(IDBBL_SMOOTHSELECTIONOP),            // bubble help ID
                                _R(IDD_BARCONTROLSTORE),                // resource ID
                                _R(IDC_BTN_SMOOTHSELECTIONOP),          // control ID
                                SYSTEMBAR_EDIT,                     // Group bar ID
                                TRUE,                               // Receive messages
                                FALSE,                              // Smart
                                FALSE,                              // Clean
                                0,                                  // One open Instance ID
                                (GREY_WHEN_NO_CURRENT_DOC | GREY_WHEN_NO_SELECTION)
                                )); 

}               


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

>   OpState OpSmoothSelection::GetState(String_256*, OpDescriptor*)

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:    20/10/94
    Inputs:     -
    Outputs:    -
    Returns:    The state of the OpSmoothSelection
    Purpose:    For finding the OpSmoothSelection state. 
    Errors:     -
    SeeAlso:    -

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

OpState OpSmoothSelection::GetState(String_256* UIDescription, OpDescriptor*)
{
    OpState OpSt;
    String_256 DisableReason; 

    OpSt.Greyed = FALSE;
    BOOL FoundSelected = FALSE;

    // Go through the selection until we find a selected point

    SelRange* Selected = GetApplication()->FindSelection();
    Node* pNode = Selected->FindFirst();

    while (pNode)
    {
        if (pNode->GetRuntimeClass() == CC_RUNTIME_CLASS(NodePath))
        {
            if (((NodePath*)pNode)->InkPath.NumSplinters() >0 )
            {
                FoundSelected = TRUE;
                break;
            }

        }
        pNode = Selected->FindNext(pNode);
    }

    // The operation is disabled if there are no complex paths selected

    if (!FoundSelected)
    {
        OpSt.Greyed = TRUE;
        DisableReason = String_256(_R(IDS_NEEDS_SELECTED_POINT));
        *UIDescription = DisableReason;
    }

    return(OpSt);   
}



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

>   void OpSmoothSelection::GetOpName(String_256* OpName)

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>
    Created:    20/10/94
    Inputs:     -
    Outputs:    The undo string for the operation
    Returns:    
    Purpose:    The GetOpName fn is overridden so that we return back a description
                appropriate to the type of attribute that the operation applies.
                    
    Errors:     -
    SeeAlso:    -

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

void OpSmoothSelection::GetOpName(String_256* OpName)
{
    *OpName = String_256(_R(IDS_UNDO_SMOOTHSELECTIONOP));
}






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

> void OpSmoothSelection::Do(OpDescriptor* opDesc)

    Author:     Mike_Kenny (Xara Group Ltd) <camelotdev@xara.com>       
    Created:    20/10/94
    Inputs:     pointer to an OpDescriptor (unused)
    Outputs:    -
    Returns:    -
    Purpose:    This operation will smooth all selected paths within the current document
                Before smoothing any complete path, the path is searched for selected points
                The action of the smooth given a number of selected points is as follows
                No sel points:  Smooth the whole path
                One sel point:  Smooth the whole path.
                                Could smooth from the start of the path to this point but
                                the user does not generally known which part is the start
                                of the path.
                Two sel points: Smooth the section of path lying between these points.
                Even number:    Smooth using inside/outside section processing.
                                (a,b) (c,d) .... (y,z) etc are regions for smoothing
                Odd number:     Smooth as for even number apart from last region
                                (a,b) (c,d) ........ (f,g,h)
    Errors:     failandexecute will be called if the operation fails in some way, most
                likely when no memory is available. 

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

void OpSmoothSelection::Do(OpDescriptor*)
{
    // Obtain the current selections 
    SelRange* Selected = GetApplication()->FindSelection();
    NodePath* pSmoothNode;

    // Now, because we're going to be doing mad things to the selection, we have to make a list
    // of all the selected nodes, so that adding nodes into the tree won't confuse us

    List* NodeList = Selected->MakeListOfNodes();
    NodeListItem* CurItem = (NodeListItem*)(NodeList->GetHead());

    if (!CurItem)
        goto FailAndDeleteList;

    // remember the selection before the operation
    if (!DoStartSelOp(FALSE,FALSE))
        goto FailAndDeleteList;

    while (CurItem)
    {
        if (CurItem->pNode->GetRuntimeClass() == CC_RUNTIME_CLASS(NodePath))
        {
            // get a pointer to the NodePath
            NodePath* pThisNode = (NodePath*)(CurItem->pNode);

            BOOL ok;
            Node* pnode;

            // Copy the nodepath and all its children, without placing the copy in the tree
            CALL_WITH_FAIL(pThisNode->NodeCopy(&pnode), this, ok);
            if (!ok) goto DeleteList;
            pSmoothNode = (NodePath*)pnode;

            // ok, smooth the nodepaths path data
            double error = SMOOTH_CONSTANT;
            CALL_WITH_FAIL(pSmoothNode->InkPath.SmoothRegions(error, FALSE, TRUE), this, ok);
            if (!ok) goto DeleteListAndPath;

            // update the smoothed paths bounding rectangle
            pSmoothNode->InvalidateBoundingRect();
            pSmoothNode->InkPath.ClearSubSelection();

            // Now stick the new path into the tree
            CALL_WITH_FAIL(DoInsertNewNode(pSmoothNode, pThisNode, NEXT, TRUE), this, ok);
            if (!ok) goto DeleteListAndPath;
            
            // Now we've formed a smoothed path, let's hide the original
            CALL_WITH_FAIL(DoHideNode(pThisNode,TRUE), this, ok);
            if (!ok) goto DeleteList;

        }
        CurItem = (NodeListItem*)(NodeList->GetNext(CurItem));
    }

    End();

    // delete the nodelist (and all the list items)
    while (!NodeList->IsEmpty())
        delete (NodeListItem*)(NodeList->RemoveHead());
    delete NodeList;
    return;


FailAndDeleteList:
    while (!NodeList->IsEmpty())
        delete (NodeListItem*)(NodeList->RemoveHead());
    delete NodeList;
    FailAndExecute();
    End();
    return;

DeleteListAndPath:
    pSmoothNode->CascadeDelete();
    delete pSmoothNode;
DeleteList:
    while (!NodeList->IsEmpty())
        delete (NodeListItem*)(NodeList->RemoveHead());
    delete NodeList;
    End();
    return;

}

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