contrib/src/ogl/constrnt.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        constrnt.cpp
// Purpose:     OGL Constraint classes
// Author:      Julian Smart
// Modified by:
// Created:     12/07/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "constrnt.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include <wx/wx.h>
#endif

#if wxUSE_PROLOGIO
#include <wx/deprecated/wxexpr.h>
#endif

#include "wx/ogl/ogl.h"


wxList *wxOGLConstraintTypes = NULL;

/*
 * Constraint type
 *
 */

IMPLEMENT_DYNAMIC_CLASS(wxOGLConstraintType, wxObject)

wxOGLConstraintType::wxOGLConstraintType(int theType, const wxString& theName, const wxString& thePhrase)
{
  m_type = theType;
  m_name = theName;
  m_phrase = thePhrase;
}

wxOGLConstraintType::~wxOGLConstraintType()
{
}

void OGLInitializeConstraintTypes()
{
    if (!wxOGLConstraintTypes)
        return;

    wxOGLConstraintTypes = new wxList(wxKEY_INTEGER);

    wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_VERTICALLY,
        new wxOGLConstraintType(gyCONSTRAINT_CENTRED_VERTICALLY, wxT("Centre vertically"), wxT("centred vertically w.r.t.")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_HORIZONTALLY,
        new wxOGLConstraintType(gyCONSTRAINT_CENTRED_HORIZONTALLY, wxT("Centre horizontally"), wxT("centred horizontally w.r.t.")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_BOTH,
        new wxOGLConstraintType(gyCONSTRAINT_CENTRED_BOTH, wxT("Centre"), wxT("centred w.r.t.")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_LEFT_OF,
        new wxOGLConstraintType(gyCONSTRAINT_LEFT_OF, wxT("Left of"), wxT("left of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_RIGHT_OF,
        new wxOGLConstraintType(gyCONSTRAINT_RIGHT_OF, wxT("Right of"), wxT("right of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_ABOVE,
        new wxOGLConstraintType(gyCONSTRAINT_ABOVE, wxT("Above"), wxT("above")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_BELOW,
        new wxOGLConstraintType(gyCONSTRAINT_BELOW, wxT("Below"), wxT("below")));

    // Alignment
    wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_TOP,
        new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_TOP, wxT("Top-aligned"), wxT("aligned to the top of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_BOTTOM,
        new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_BOTTOM, wxT("Bottom-aligned"), wxT("aligned to the bottom of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_LEFT,
        new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_LEFT, wxT("Left-aligned"), wxT("aligned to the left of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_RIGHT,
        new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_RIGHT, wxT("Right-aligned"), wxT("aligned to the right of")));

    // Mid-alignment
    wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_TOP,
        new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_TOP, wxT("Top-midaligned"), wxT("centred on the top of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_BOTTOM,
        new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_BOTTOM, wxT("Bottom-midaligned"), wxT("centred on the bottom of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_LEFT,
        new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_LEFT, wxT("Left-midaligned"), wxT("centred on the left of")));

    wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_RIGHT,
        new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_RIGHT, wxT("Right-midaligned"), wxT("centred on the right of")));
}

void OGLCleanUpConstraintTypes()
{
    if (!wxOGLConstraintTypes)
        return;

    wxNode* node = wxOGLConstraintTypes->GetFirst();
    while (node)
    {
        wxOGLConstraintType* ct = (wxOGLConstraintType*) node->GetData();
        delete ct;
        node = node->GetNext();
    }
    delete wxOGLConstraintTypes;
    wxOGLConstraintTypes = NULL;
}

/*
 * Constraint Stuff
 *
 */

IMPLEMENT_DYNAMIC_CLASS(wxOGLConstraint, wxObject)

wxOGLConstraint::wxOGLConstraint(int type, wxShape *constraining, wxList& constrained)
{
  m_xSpacing = 0.0;
  m_ySpacing = 0.0;

  m_constraintType = type;
  m_constrainingObject = constraining;

  m_constraintId = 0;
  m_constraintName = wxT("noname");

  wxNode *node = constrained.GetFirst();
  while (node)
  {
    m_constrainedObjects.Append(node->GetData());
    node = node->GetNext();
  }
}

wxOGLConstraint::~wxOGLConstraint()
{
}

bool wxOGLConstraint::Equals(double a, double b)
{
  double marg = 0.5;

  bool eq = ((b <= a + marg) && (b >= a - marg));
  return eq;
}

// Return true if anything changed
bool wxOGLConstraint::Evaluate()
{
  double maxWidth, maxHeight, minWidth, minHeight, x, y;
  m_constrainingObject->GetBoundingBoxMax(&maxWidth, &maxHeight);
  m_constrainingObject->GetBoundingBoxMin(&minWidth, &minHeight);
  x = m_constrainingObject->GetX();
  y = m_constrainingObject->GetY();

  wxClientDC dc(m_constrainingObject->GetCanvas());
  m_constrainingObject->GetCanvas()->PrepareDC(dc);

  switch (m_constraintType)
  {
    case gyCONSTRAINT_CENTRED_VERTICALLY:
    {
      int n = m_constrainedObjects.GetCount();
      double totalObjectHeight = 0.0;
      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);
        totalObjectHeight += height2;
        node = node->GetNext();
      }
      double startY;
      double spacingY;
      // Check if within the constraining object...
      if ((totalObjectHeight + (n + 1)*m_ySpacing) <= minHeight)
      {
        spacingY = (double)((minHeight - totalObjectHeight)/(n + 1));
        startY = (double)(y - (minHeight/2.0));
      }
      // Otherwise, use default spacing
      else
      {
        spacingY = m_ySpacing;
        startY = (double)(y - ((totalObjectHeight + (n+1)*spacingY)/2.0));
      }

      // Now position the objects
      bool changed = false;
      node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();
        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);
        startY += (double)(spacingY + (height2/2.0));
        if (!Equals(startY, constrainedObject->GetY()))
        {
          constrainedObject->Move(dc, constrainedObject->GetX(), startY, false);
          changed = true;
        }
        startY += (double)(height2/2.0);
        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_CENTRED_HORIZONTALLY:
    {
      int n = m_constrainedObjects.GetCount();
      double totalObjectWidth = 0.0;
      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);
        totalObjectWidth += width2;
        node = node->GetNext();
      }
      double startX;
      double spacingX;
      // Check if within the constraining object...
      if ((totalObjectWidth + (n + 1)*m_xSpacing) <= minWidth)
      {
        spacingX = (double)((minWidth - totalObjectWidth)/(n + 1));
        startX = (double)(x - (minWidth/2.0));
      }
      // Otherwise, use default spacing
      else
      {
        spacingX = m_xSpacing;
        startX = (double)(x - ((totalObjectWidth + (n+1)*spacingX)/2.0));
      }

      // Now position the objects
      bool changed = false;
      node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();
        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);
        startX += (double)(spacingX + (width2/2.0));
        if (!Equals(startX, constrainedObject->GetX()))
        {
          constrainedObject->Move(dc, startX, constrainedObject->GetY(), false);
          changed = true;
        }
        startX += (double)(width2/2.0);
        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_CENTRED_BOTH:
    {
      int n = m_constrainedObjects.GetCount();
      double totalObjectWidth = 0.0;
      double totalObjectHeight = 0.0;
      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);
        totalObjectWidth += width2;
        totalObjectHeight += height2;
        node = node->GetNext();
      }
      double startX;
      double spacingX;
      double startY;
      double spacingY;

      // Check if within the constraining object...
      if ((totalObjectWidth + (n + 1)*m_xSpacing) <= minWidth)
      {
        spacingX = (double)((minWidth - totalObjectWidth)/(n + 1));
        startX = (double)(x - (minWidth/2.0));
      }
      // Otherwise, use default spacing
      else
      {
        spacingX = m_xSpacing;
        startX = (double)(x - ((totalObjectWidth + (n+1)*spacingX)/2.0));
      }

      // Check if within the constraining object...
      if ((totalObjectHeight + (n + 1)*m_ySpacing) <= minHeight)
      {
        spacingY = (double)((minHeight - totalObjectHeight)/(n + 1));
        startY = (double)(y - (minHeight/2.0));
      }
      // Otherwise, use default spacing
      else
      {
        spacingY = m_ySpacing;
        startY = (double)(y - ((totalObjectHeight + (n+1)*spacingY)/2.0));
      }

      // Now position the objects
      bool changed = false;
      node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();
        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);
        startX += (double)(spacingX + (width2/2.0));
        startY += (double)(spacingY + (height2/2.0));

        if ((!Equals(startX, constrainedObject->GetX())) || (!Equals(startY, constrainedObject->GetY())))
        {
          constrainedObject->Move(dc, startX, startY, false);
          changed = true;
        }

        startX += (double)(width2/2.0);
        startY += (double)(height2/2.0);

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_LEFT_OF:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double x3 = (double)(x - (minWidth/2.0) - (width2/2.0) - m_xSpacing);
        if (!Equals(x3, constrainedObject->GetX()))
        {
          changed = true;
          constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_RIGHT_OF:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double x3 = (double)(x + (minWidth/2.0) + (width2/2.0) + m_xSpacing);
        if (!Equals(x3, constrainedObject->GetX()))
        {
          changed = true;
          constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_ABOVE:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double y3 = (double)(y - (minHeight/2.0) - (height2/2.0) - m_ySpacing);
        if (!Equals(y3, constrainedObject->GetY()))
        {
          changed = true;
          constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_BELOW:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double y3 = (double)(y + (minHeight/2.0) + (height2/2.0) + m_ySpacing);
        if (!Equals(y3, constrainedObject->GetY()))
        {
          changed = true;
          constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_ALIGNED_LEFT:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double x3 = (double)(x - (minWidth/2.0) + (width2/2.0) + m_xSpacing);
        if (!Equals(x3, constrainedObject->GetX()))
        {
          changed = true;
          constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_ALIGNED_RIGHT:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double x3 = (double)(x + (minWidth/2.0) - (width2/2.0) - m_xSpacing);
        if (!Equals(x3, constrainedObject->GetX()))
        {
          changed = true;
          constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
        }

        node = node->GetNext();
      }
      return changed;
      #if 0
      // two returned values ?
      return false;
      #endif
    }
    case gyCONSTRAINT_ALIGNED_TOP:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double y3 = (double)(y - (minHeight/2.0) + (height2/2.0) + m_ySpacing);
        if (!Equals(y3, constrainedObject->GetY()))
        {
          changed = true;
          constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_ALIGNED_BOTTOM:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double width2, height2;
        constrainedObject->GetBoundingBoxMax(&width2, &height2);

        double y3 = (double)(y + (minHeight/2.0) - (height2/2.0) - m_ySpacing);
        if (!Equals(y3, constrainedObject->GetY()))
        {
          changed = true;
          constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_MIDALIGNED_LEFT:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double x3 = (double)(x - (minWidth/2.0));
        if (!Equals(x3, constrainedObject->GetX()))
        {
          changed = true;
          constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_MIDALIGNED_RIGHT:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double x3 = (double)(x + (minWidth/2.0));
        if (!Equals(x3, constrainedObject->GetX()))
        {
          changed = true;
          constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
        }

        node = node->GetNext();
      }
      return changed;
      #if 0
      // two returned values ?
      return false;
      #endif
    }
    case gyCONSTRAINT_MIDALIGNED_TOP:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double y3 = (double)(y - (minHeight/2.0));
        if (!Equals(y3, constrainedObject->GetY()))
        {
          changed = true;
          constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    case gyCONSTRAINT_MIDALIGNED_BOTTOM:
    {
      bool changed = false;

      wxNode *node = m_constrainedObjects.GetFirst();
      while (node)
      {
        wxShape *constrainedObject = (wxShape *)node->GetData();

        double y3 = (double)(y + (minHeight/2.0));
        if (!Equals(y3, constrainedObject->GetY()))
        {
          changed = true;
          constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
        }

        node = node->GetNext();
      }
      return changed;
    }
    #if 0
    // default value handled in main function body
    default:
      return false;
    #endif
  }
  return false;
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: constrnt.cpp
	3	// Purpose: OGL Constraint classes
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 12/07/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart
	9	// Licence: wxWindows licence
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "constrnt.h"
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#ifdef __BORLANDC__
	20	#pragma hdrstop
	21	#endif
	22
	23	#ifndef WX_PRECOMP
	24	#include <wx/wx.h>
	25	#endif
	26
	27	#if wxUSE_PROLOGIO
	28	#include <wx/deprecated/wxexpr.h>
	29	#endif
	30
	31	#include "wx/ogl/ogl.h"
	32
	33
	34	wxList *wxOGLConstraintTypes = NULL;
	35
	36	/*
	37	* Constraint type
	38	*
	39	*/
	40
	41	IMPLEMENT_DYNAMIC_CLASS(wxOGLConstraintType, wxObject)
	42
	43	wxOGLConstraintType::wxOGLConstraintType(int theType, const wxString& theName, const wxString& thePhrase)
	44	{
	45	m_type = theType;
	46	m_name = theName;
	47	m_phrase = thePhrase;
	48	}
	49
	50	wxOGLConstraintType::~wxOGLConstraintType()
	51	{
	52	}
	53
	54	void OGLInitializeConstraintTypes()
	55	{
	56	if (!wxOGLConstraintTypes)
	57	return;
	58
	59	wxOGLConstraintTypes = new wxList(wxKEY_INTEGER);
	60
	61	wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_VERTICALLY,
	62	new wxOGLConstraintType(gyCONSTRAINT_CENTRED_VERTICALLY, wxT("Centre vertically"), wxT("centred vertically w.r.t.")));
	63
	64	wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_HORIZONTALLY,
	65	new wxOGLConstraintType(gyCONSTRAINT_CENTRED_HORIZONTALLY, wxT("Centre horizontally"), wxT("centred horizontally w.r.t.")));
	66
	67	wxOGLConstraintTypes->Append(gyCONSTRAINT_CENTRED_BOTH,
	68	new wxOGLConstraintType(gyCONSTRAINT_CENTRED_BOTH, wxT("Centre"), wxT("centred w.r.t.")));
	69
	70	wxOGLConstraintTypes->Append(gyCONSTRAINT_LEFT_OF,
	71	new wxOGLConstraintType(gyCONSTRAINT_LEFT_OF, wxT("Left of"), wxT("left of")));
	72
	73	wxOGLConstraintTypes->Append(gyCONSTRAINT_RIGHT_OF,
	74	new wxOGLConstraintType(gyCONSTRAINT_RIGHT_OF, wxT("Right of"), wxT("right of")));
	75
	76	wxOGLConstraintTypes->Append(gyCONSTRAINT_ABOVE,
	77	new wxOGLConstraintType(gyCONSTRAINT_ABOVE, wxT("Above"), wxT("above")));
	78
	79	wxOGLConstraintTypes->Append(gyCONSTRAINT_BELOW,
	80	new wxOGLConstraintType(gyCONSTRAINT_BELOW, wxT("Below"), wxT("below")));
	81
	82	// Alignment
	83	wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_TOP,
	84	new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_TOP, wxT("Top-aligned"), wxT("aligned to the top of")));
	85
	86	wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_BOTTOM,
	87	new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_BOTTOM, wxT("Bottom-aligned"), wxT("aligned to the bottom of")));
	88
	89	wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_LEFT,
	90	new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_LEFT, wxT("Left-aligned"), wxT("aligned to the left of")));
	91
	92	wxOGLConstraintTypes->Append(gyCONSTRAINT_ALIGNED_RIGHT,
	93	new wxOGLConstraintType(gyCONSTRAINT_ALIGNED_RIGHT, wxT("Right-aligned"), wxT("aligned to the right of")));
	94
	95	// Mid-alignment
	96	wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_TOP,
	97	new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_TOP, wxT("Top-midaligned"), wxT("centred on the top of")));
	98
	99	wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_BOTTOM,
	100	new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_BOTTOM, wxT("Bottom-midaligned"), wxT("centred on the bottom of")));
	101
	102	wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_LEFT,
	103	new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_LEFT, wxT("Left-midaligned"), wxT("centred on the left of")));
	104
	105	wxOGLConstraintTypes->Append(gyCONSTRAINT_MIDALIGNED_RIGHT,
	106	new wxOGLConstraintType(gyCONSTRAINT_MIDALIGNED_RIGHT, wxT("Right-midaligned"), wxT("centred on the right of")));
	107	}
	108
	109	void OGLCleanUpConstraintTypes()
	110	{
	111	if (!wxOGLConstraintTypes)
	112	return;
	113
	114	wxNode* node = wxOGLConstraintTypes->GetFirst();
	115	while (node)
	116	{
	117	wxOGLConstraintType* ct = (wxOGLConstraintType*) node->GetData();
	118	delete ct;
	119	node = node->GetNext();
	120	}
	121	delete wxOGLConstraintTypes;
	122	wxOGLConstraintTypes = NULL;
	123	}
	124
	125	/*
	126	* Constraint Stuff
	127	*
	128	*/
	129
	130	IMPLEMENT_DYNAMIC_CLASS(wxOGLConstraint, wxObject)
	131
	132	wxOGLConstraint::wxOGLConstraint(int type, wxShape *constraining, wxList& constrained)
	133	{
	134	m_xSpacing = 0.0;
	135	m_ySpacing = 0.0;
	136
	137	m_constraintType = type;
	138	m_constrainingObject = constraining;
	139
	140	m_constraintId = 0;
	141	m_constraintName = wxT("noname");
	142
	143	wxNode *node = constrained.GetFirst();
	144	while (node)
	145	{
	146	m_constrainedObjects.Append(node->GetData());
	147	node = node->GetNext();
	148	}
	149	}
	150
	151	wxOGLConstraint::~wxOGLConstraint()
	152	{
	153	}
	154
	155	bool wxOGLConstraint::Equals(double a, double b)
	156	{
	157	double marg = 0.5;
	158
	159	bool eq = ((b <= a + marg) && (b >= a - marg));
	160	return eq;
	161	}
	162
	163	// Return true if anything changed
	164	bool wxOGLConstraint::Evaluate()
	165	{
	166	double maxWidth, maxHeight, minWidth, minHeight, x, y;
	167	m_constrainingObject->GetBoundingBoxMax(&maxWidth, &maxHeight);
	168	m_constrainingObject->GetBoundingBoxMin(&minWidth, &minHeight);
	169	x = m_constrainingObject->GetX();
	170	y = m_constrainingObject->GetY();
	171
	172	wxClientDC dc(m_constrainingObject->GetCanvas());
	173	m_constrainingObject->GetCanvas()->PrepareDC(dc);
	174
	175	switch (m_constraintType)
	176	{
	177	case gyCONSTRAINT_CENTRED_VERTICALLY:
	178	{
	179	int n = m_constrainedObjects.GetCount();
	180	double totalObjectHeight = 0.0;
	181	wxNode *node = m_constrainedObjects.GetFirst();
	182	while (node)
	183	{
	184	wxShape constrainedObject = (wxShape )node->GetData();
	185
	186	double width2, height2;
	187	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	188	totalObjectHeight += height2;
	189	node = node->GetNext();
	190	}
	191	double startY;
	192	double spacingY;
	193	// Check if within the constraining object...
	194	if ((totalObjectHeight + (n + 1)*m_ySpacing) <= minHeight)
	195	{
	196	spacingY = (double)((minHeight - totalObjectHeight)/(n + 1));
	197	startY = (double)(y - (minHeight/2.0));
	198	}
	199	// Otherwise, use default spacing
	200	else
	201	{
	202	spacingY = m_ySpacing;
	203	startY = (double)(y - ((totalObjectHeight + (n+1)*spacingY)/2.0));
	204	}
	205
	206	// Now position the objects
	207	bool changed = false;
	208	node = m_constrainedObjects.GetFirst();
	209	while (node)
	210	{
	211	wxShape constrainedObject = (wxShape )node->GetData();
	212	double width2, height2;
	213	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	214	startY += (double)(spacingY + (height2/2.0));
	215	if (!Equals(startY, constrainedObject->GetY()))
	216	{
	217	constrainedObject->Move(dc, constrainedObject->GetX(), startY, false);
	218	changed = true;
	219	}
	220	startY += (double)(height2/2.0);
	221	node = node->GetNext();
	222	}
	223	return changed;
	224	}
	225	case gyCONSTRAINT_CENTRED_HORIZONTALLY:
	226	{
	227	int n = m_constrainedObjects.GetCount();
	228	double totalObjectWidth = 0.0;
	229	wxNode *node = m_constrainedObjects.GetFirst();
	230	while (node)
	231	{
	232	wxShape constrainedObject = (wxShape )node->GetData();
	233
	234	double width2, height2;
	235	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	236	totalObjectWidth += width2;
	237	node = node->GetNext();
	238	}
	239	double startX;
	240	double spacingX;
	241	// Check if within the constraining object...
	242	if ((totalObjectWidth + (n + 1)*m_xSpacing) <= minWidth)
	243	{
	244	spacingX = (double)((minWidth - totalObjectWidth)/(n + 1));
	245	startX = (double)(x - (minWidth/2.0));
	246	}
	247	// Otherwise, use default spacing
	248	else
	249	{
	250	spacingX = m_xSpacing;
	251	startX = (double)(x - ((totalObjectWidth + (n+1)*spacingX)/2.0));
	252	}
	253
	254	// Now position the objects
	255	bool changed = false;
	256	node = m_constrainedObjects.GetFirst();
	257	while (node)
	258	{
	259	wxShape constrainedObject = (wxShape )node->GetData();
	260	double width2, height2;
	261	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	262	startX += (double)(spacingX + (width2/2.0));
	263	if (!Equals(startX, constrainedObject->GetX()))
	264	{
	265	constrainedObject->Move(dc, startX, constrainedObject->GetY(), false);
	266	changed = true;
	267	}
	268	startX += (double)(width2/2.0);
	269	node = node->GetNext();
	270	}
	271	return changed;
	272	}
	273	case gyCONSTRAINT_CENTRED_BOTH:
	274	{
	275	int n = m_constrainedObjects.GetCount();
	276	double totalObjectWidth = 0.0;
	277	double totalObjectHeight = 0.0;
	278	wxNode *node = m_constrainedObjects.GetFirst();
	279	while (node)
	280	{
	281	wxShape constrainedObject = (wxShape )node->GetData();
	282
	283	double width2, height2;
	284	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	285	totalObjectWidth += width2;
	286	totalObjectHeight += height2;
	287	node = node->GetNext();
	288	}
	289	double startX;
	290	double spacingX;
	291	double startY;
	292	double spacingY;
	293
	294	// Check if within the constraining object...
	295	if ((totalObjectWidth + (n + 1)*m_xSpacing) <= minWidth)
	296	{
	297	spacingX = (double)((minWidth - totalObjectWidth)/(n + 1));
	298	startX = (double)(x - (minWidth/2.0));
	299	}
	300	// Otherwise, use default spacing
	301	else
	302	{
	303	spacingX = m_xSpacing;
	304	startX = (double)(x - ((totalObjectWidth + (n+1)*spacingX)/2.0));
	305	}
	306
	307	// Check if within the constraining object...
	308	if ((totalObjectHeight + (n + 1)*m_ySpacing) <= minHeight)
	309	{
	310	spacingY = (double)((minHeight - totalObjectHeight)/(n + 1));
	311	startY = (double)(y - (minHeight/2.0));
	312	}
	313	// Otherwise, use default spacing
	314	else
	315	{
	316	spacingY = m_ySpacing;
	317	startY = (double)(y - ((totalObjectHeight + (n+1)*spacingY)/2.0));
	318	}
	319
	320	// Now position the objects
	321	bool changed = false;
	322	node = m_constrainedObjects.GetFirst();
	323	while (node)
	324	{
	325	wxShape constrainedObject = (wxShape )node->GetData();
	326	double width2, height2;
	327	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	328	startX += (double)(spacingX + (width2/2.0));
	329	startY += (double)(spacingY + (height2/2.0));
	330
	331	if ((!Equals(startX, constrainedObject->GetX())) \|\| (!Equals(startY, constrainedObject->GetY())))
	332	{
	333	constrainedObject->Move(dc, startX, startY, false);
	334	changed = true;
	335	}
	336
	337	startX += (double)(width2/2.0);
	338	startY += (double)(height2/2.0);
	339
	340	node = node->GetNext();
	341	}
	342	return changed;
	343	}
	344	case gyCONSTRAINT_LEFT_OF:
	345	{
	346	bool changed = false;
	347
	348	wxNode *node = m_constrainedObjects.GetFirst();
	349	while (node)
	350	{
	351	wxShape constrainedObject = (wxShape )node->GetData();
	352
	353	double width2, height2;
	354	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	355
	356	double x3 = (double)(x - (minWidth/2.0) - (width2/2.0) - m_xSpacing);
	357	if (!Equals(x3, constrainedObject->GetX()))
	358	{
	359	changed = true;
	360	constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
	361	}
	362
	363	node = node->GetNext();
	364	}
	365	return changed;
	366	}
	367	case gyCONSTRAINT_RIGHT_OF:
	368	{
	369	bool changed = false;
	370
	371	wxNode *node = m_constrainedObjects.GetFirst();
	372	while (node)
	373	{
	374	wxShape constrainedObject = (wxShape )node->GetData();
	375
	376	double width2, height2;
	377	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	378
	379	double x3 = (double)(x + (minWidth/2.0) + (width2/2.0) + m_xSpacing);
	380	if (!Equals(x3, constrainedObject->GetX()))
	381	{
	382	changed = true;
	383	constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
	384	}
	385
	386	node = node->GetNext();
	387	}
	388	return changed;
	389	}
	390	case gyCONSTRAINT_ABOVE:
	391	{
	392	bool changed = false;
	393
	394	wxNode *node = m_constrainedObjects.GetFirst();
	395	while (node)
	396	{
	397	wxShape constrainedObject = (wxShape )node->GetData();
	398
	399	double width2, height2;
	400	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	401
	402	double y3 = (double)(y - (minHeight/2.0) - (height2/2.0) - m_ySpacing);
	403	if (!Equals(y3, constrainedObject->GetY()))
	404	{
	405	changed = true;
	406	constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
	407	}
	408
	409	node = node->GetNext();
	410	}
	411	return changed;
	412	}
	413	case gyCONSTRAINT_BELOW:
	414	{
	415	bool changed = false;
	416
	417	wxNode *node = m_constrainedObjects.GetFirst();
	418	while (node)
	419	{
	420	wxShape constrainedObject = (wxShape )node->GetData();
	421
	422	double width2, height2;
	423	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	424
	425	double y3 = (double)(y + (minHeight/2.0) + (height2/2.0) + m_ySpacing);
	426	if (!Equals(y3, constrainedObject->GetY()))
	427	{
	428	changed = true;
	429	constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
	430	}
	431
	432	node = node->GetNext();
	433	}
	434	return changed;
	435	}
	436	case gyCONSTRAINT_ALIGNED_LEFT:
	437	{
	438	bool changed = false;
	439
	440	wxNode *node = m_constrainedObjects.GetFirst();
	441	while (node)
	442	{
	443	wxShape constrainedObject = (wxShape )node->GetData();
	444
	445	double width2, height2;
	446	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	447
	448	double x3 = (double)(x - (minWidth/2.0) + (width2/2.0) + m_xSpacing);
	449	if (!Equals(x3, constrainedObject->GetX()))
	450	{
	451	changed = true;
	452	constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
	453	}
	454
	455	node = node->GetNext();
	456	}
	457	return changed;
	458	}
	459	case gyCONSTRAINT_ALIGNED_RIGHT:
	460	{
	461	bool changed = false;
	462
	463	wxNode *node = m_constrainedObjects.GetFirst();
	464	while (node)
	465	{
	466	wxShape constrainedObject = (wxShape )node->GetData();
	467
	468	double width2, height2;
	469	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	470
	471	double x3 = (double)(x + (minWidth/2.0) - (width2/2.0) - m_xSpacing);
	472	if (!Equals(x3, constrainedObject->GetX()))
	473	{
	474	changed = true;
	475	constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
	476	}
	477
	478	node = node->GetNext();
	479	}
	480	return changed;
	481	#if 0
	482	// two returned values ?
	483	return false;
	484	#endif
	485	}
	486	case gyCONSTRAINT_ALIGNED_TOP:
	487	{
	488	bool changed = false;
	489
	490	wxNode *node = m_constrainedObjects.GetFirst();
	491	while (node)
	492	{
	493	wxShape constrainedObject = (wxShape )node->GetData();
	494
	495	double width2, height2;
	496	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	497
	498	double y3 = (double)(y - (minHeight/2.0) + (height2/2.0) + m_ySpacing);
	499	if (!Equals(y3, constrainedObject->GetY()))
	500	{
	501	changed = true;
	502	constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
	503	}
	504
	505	node = node->GetNext();
	506	}
	507	return changed;
	508	}
	509	case gyCONSTRAINT_ALIGNED_BOTTOM:
	510	{
	511	bool changed = false;
	512
	513	wxNode *node = m_constrainedObjects.GetFirst();
	514	while (node)
	515	{
	516	wxShape constrainedObject = (wxShape )node->GetData();
	517
	518	double width2, height2;
	519	constrainedObject->GetBoundingBoxMax(&width2, &height2);
	520
	521	double y3 = (double)(y + (minHeight/2.0) - (height2/2.0) - m_ySpacing);
	522	if (!Equals(y3, constrainedObject->GetY()))
	523	{
	524	changed = true;
	525	constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
	526	}
	527
	528	node = node->GetNext();
	529	}
	530	return changed;
	531	}
	532	case gyCONSTRAINT_MIDALIGNED_LEFT:
	533	{
	534	bool changed = false;
	535
	536	wxNode *node = m_constrainedObjects.GetFirst();
	537	while (node)
	538	{
	539	wxShape constrainedObject = (wxShape )node->GetData();
	540
	541	double x3 = (double)(x - (minWidth/2.0));
	542	if (!Equals(x3, constrainedObject->GetX()))
	543	{
	544	changed = true;
	545	constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
	546	}
	547
	548	node = node->GetNext();
	549	}
	550	return changed;
	551	}
	552	case gyCONSTRAINT_MIDALIGNED_RIGHT:
	553	{
	554	bool changed = false;
	555
	556	wxNode *node = m_constrainedObjects.GetFirst();
	557	while (node)
	558	{
	559	wxShape constrainedObject = (wxShape )node->GetData();
	560
	561	double x3 = (double)(x + (minWidth/2.0));
	562	if (!Equals(x3, constrainedObject->GetX()))
	563	{
	564	changed = true;
	565	constrainedObject->Move(dc, x3, constrainedObject->GetY(), false);
	566	}
	567
	568	node = node->GetNext();
	569	}
	570	return changed;
	571	#if 0
	572	// two returned values ?
	573	return false;
	574	#endif
	575	}
	576	case gyCONSTRAINT_MIDALIGNED_TOP:
	577	{
	578	bool changed = false;
	579
	580	wxNode *node = m_constrainedObjects.GetFirst();
	581	while (node)
	582	{
	583	wxShape constrainedObject = (wxShape )node->GetData();
	584
	585	double y3 = (double)(y - (minHeight/2.0));
	586	if (!Equals(y3, constrainedObject->GetY()))
	587	{
	588	changed = true;
	589	constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
	590	}
	591
	592	node = node->GetNext();
	593	}
	594	return changed;
	595	}
	596	case gyCONSTRAINT_MIDALIGNED_BOTTOM:
	597	{
	598	bool changed = false;
	599
	600	wxNode *node = m_constrainedObjects.GetFirst();
	601	while (node)
	602	{
	603	wxShape constrainedObject = (wxShape )node->GetData();
	604
	605	double y3 = (double)(y + (minHeight/2.0));
	606	if (!Equals(y3, constrainedObject->GetY()))
	607	{
	608	changed = true;
	609	constrainedObject->Move(dc, constrainedObject->GetX(), y3, false);
	610	}
	611
	612	node = node->GetNext();
	613	}
	614	return changed;
	615	}
	616	#if 0
	617	// default value handled in main function body
	618	default:
	619	return false;
	620	#endif
	621	}
	622	return false;
	623	}
	624