drawn.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

        expr->Append(new wxExpr((long)theBrush->GetColour().Blue()));
      }
      else if (obj->IsKindOf(CLASSINFO(wxFont)))
      {
        wxFont *theFont = (wxFont *)obj;
        expr = new wxExpr(wxExprList);
        expr->Append(new wxExpr((long)gyTYPE_FONT));
        expr->Append(new wxExpr((long)theFont->GetPointSize()));
        expr->Append(new wxExpr((long)theFont->GetFamily()));
        expr->Append(new wxExpr((long)theFont->GetStyle()));
        expr->Append(new wxExpr((long)theFont->GetWeight()));
        expr->Append(new wxExpr((long)theFont->GetUnderlined()));
      }
    }
    else
    {
      // If no recognised GDI object, append a place holder anyway.
      expr = new wxExpr(wxExprList);
      expr->Append(new wxExpr((long)0));
    }

    if (expr)
    {
      clause->AddAttributeValue(buf, expr);
      i ++;
    }
    node = node->GetNext();
  }

  // Write drawing operations
  i = 1;
  node = m_ops.GetFirst();
  while (node)
  {
    wxSprintf(buf, _T("op%d_%d"), whichAngle, i);
    wxDrawOp *op = (wxDrawOp *)node->GetData();
    wxExpr *expr = op->WriteExpr(this);
    if (expr)
    {
      clause->AddAttributeValue(buf, expr);
      i ++;
    }
    node = node->GetNext();
  }

  // Write outline and fill GDI op lists (if any)
  if (m_outlineColours.GetCount() > 0)
  {
    wxExpr *outlineExpr = new wxExpr(wxExprList);
    node = m_outlineColours.GetFirst();
    while (node)
    {
      outlineExpr->Append(new wxExpr((long)node->GetData()));
      node = node->GetNext();
    }
    wxString outlineObjectsStr;
    outlineObjectsStr.Printf(wxT("outline_objects%d"), whichAngle);

    clause->AddAttributeValue(outlineObjectsStr, outlineExpr);
  }
  if (m_fillColours.GetCount() > 0)
  {
    wxExpr *fillExpr = new wxExpr(wxExprList);
    node = m_fillColours.GetFirst();
    while (node)
    {
      fillExpr->Append(new wxExpr((long)node->GetData()));
      node = node->GetNext();
    }
    wxString fillObjectsStr;
    fillObjectsStr.Printf(wxT("fill_objects%d"), whichAngle);

    clause->AddAttributeValue(fillObjectsStr, fillExpr);
  }

}

void wxPseudoMetaFile::ReadAttributes(wxExpr *clause, int whichAngle)
{
  wxString widthStr;
  widthStr.Printf(wxT("meta_width%d"), whichAngle);

  wxString heightStr;
  heightStr.Printf(wxT("meta_height%d"), whichAngle);

  wxString outlineStr;
  outlineStr.Printf(wxT("outline_op%d"), whichAngle);

  wxString rotateableStr;
  rotateableStr.Printf(wxT("meta_rotateable%d"), whichAngle);

  clause->GetAttributeValue(widthStr, m_width);
  clause->GetAttributeValue(heightStr, m_height);
  clause->GetAttributeValue(outlineStr, m_outlineOp);

  int iVal = (int) m_rotateable;
  clause->GetAttributeValue(rotateableStr, iVal);
  m_rotateable = (iVal != 0);

  // Read GDI objects
  wxChar buf[50];
  int i = 1;
  bool keepGoing = true;
  while (keepGoing)
  {
    wxSprintf(buf, _T("gdi%d_%d"), whichAngle, i);
    wxExpr *expr = NULL;
    clause->GetAttributeValue(buf, &expr);
    if (!expr)
    {
      keepGoing = false;
    }
    else
    {
      wxExpr *idExpr = expr->Nth(0);
      switch (idExpr->IntegerValue())
      {
        case gyTYPE_PEN:
        {
          int penWidth = (int)expr->Nth(1)->IntegerValue();
          int penStyle = (int)expr->Nth(2)->IntegerValue();
          unsigned char penRed = (unsigned char)expr->Nth(3)->IntegerValue();
          unsigned char penGreen = (unsigned char)expr->Nth(4)->IntegerValue();
          unsigned char penBlue = (unsigned char)expr->Nth(5)->IntegerValue();
          wxColour col(penRed, penGreen, penBlue);
          wxPen *p = wxThePenList->FindOrCreatePen(col, penWidth, penStyle);
          if (!p)
            p = wxBLACK_PEN;
          m_gdiObjects.Append(p);
          break;
        }
        case gyTYPE_BRUSH:
        {
          int brushStyle = (int)expr->Nth(1)->IntegerValue();
          unsigned char brushRed = (unsigned char)expr->Nth(2)->IntegerValue();
          unsigned char brushGreen = (unsigned char)expr->Nth(3)->IntegerValue();
          unsigned char brushBlue = (unsigned char)expr->Nth(4)->IntegerValue();
          wxColour col(brushRed, brushGreen, brushBlue);
          wxBrush *b = wxTheBrushList->FindOrCreateBrush(col, brushStyle);
          if (!b)
            b = wxWHITE_BRUSH;
          m_gdiObjects.Append(b);
          break;
        }
        case gyTYPE_FONT:
        {
          int fontPointSize = (int)expr->Nth(1)->IntegerValue();
          int fontFamily = (int)expr->Nth(2)->IntegerValue();
          int fontStyle = (int)expr->Nth(3)->IntegerValue();
          int fontWeight = (int)expr->Nth(4)->IntegerValue();
          int fontUnderlined = (int)expr->Nth(5)->IntegerValue();
          m_gdiObjects.Append(wxTheFontList->FindOrCreateFont(fontPointSize,
                           fontFamily, fontStyle, fontWeight, (fontUnderlined != 0)));
          break;
        }
        default:
        {
          // Place holder
          m_gdiObjects.Append(NULL);
          break;
        }
      }
      i ++;
    }
  }

  // Now read in the operations
  keepGoing = true;
  i = 1;
  while (keepGoing)
  {
    wxSprintf(buf, _T("op%d_%d"), whichAngle, i);
    wxExpr *expr = NULL;
    clause->GetAttributeValue(buf, &expr);
    if (!expr)
    {
      keepGoing = false;
    }
    else
    {
      wxExpr *idExpr = expr->Nth(0);
      int opId = (int)idExpr->IntegerValue();
      switch (opId)
      {
        case DRAWOP_SET_PEN:
        case DRAWOP_SET_BRUSH:
        case DRAWOP_SET_FONT:
        case DRAWOP_SET_TEXT_COLOUR:
        case DRAWOP_SET_BK_COLOUR:
        case DRAWOP_SET_BK_MODE:
        {
          wxOpSetGDI *theOp = new wxOpSetGDI(opId, this, 0);
          theOp->ReadExpr(this, expr);
          m_ops.Append(theOp);
          break;
        }

        case DRAWOP_SET_CLIPPING_RECT:
        case DRAWOP_DESTROY_CLIPPING_RECT:
        {
          wxOpSetClipping *theOp = new wxOpSetClipping(opId, 0.0, 0.0, 0.0, 0.0);
          theOp->ReadExpr(this, expr);
          m_ops.Append(theOp);
          break;
        }

        case DRAWOP_DRAW_LINE:
        case DRAWOP_DRAW_RECT:
        case DRAWOP_DRAW_ROUNDED_RECT:
        case DRAWOP_DRAW_ELLIPSE:
        case DRAWOP_DRAW_POINT:
        case DRAWOP_DRAW_ARC:
        case DRAWOP_DRAW_TEXT:
        {
          wxOpDraw *theOp = new wxOpDraw(opId, 0.0, 0.0, 0.0, 0.0);
          theOp->ReadExpr(this, expr);
          m_ops.Append(theOp);
          break;
        }
        case DRAWOP_DRAW_SPLINE:
        case DRAWOP_DRAW_POLYLINE:
        case DRAWOP_DRAW_POLYGON:
        {
          wxOpPolyDraw *theOp = new wxOpPolyDraw(opId, 0, NULL);
          theOp->ReadExpr(this, expr);
          m_ops.Append(theOp);
          break;
        }
        default:
          break;
      }
    }
    i ++;
  }

  wxString outlineObjectsStr;
  outlineObjectsStr.Printf(wxT("outline_objects%d"), whichAngle);

  // Now read in the list of outline and fill operations, if any
  wxExpr *expr1 = clause->AttributeValue(outlineObjectsStr);
  if (expr1)
  {
    wxExpr *eachExpr = expr1->GetFirst();
    while (eachExpr)
    {
      m_outlineColours.Append((wxObject *)eachExpr->IntegerValue());
      eachExpr = eachExpr->GetNext();
    }
  }

  wxString fillObjectsStr;
  fillObjectsStr.Printf(wxT("fill_objects%d"), whichAngle);

  expr1 = clause->AttributeValue(fillObjectsStr);
  if (expr1)
  {
    wxExpr *eachExpr = expr1->GetFirst();
    while (eachExpr)
    {
      m_fillColours.Append((wxObject *)eachExpr->IntegerValue());
      eachExpr = eachExpr->GetNext();
    }
  }
}
#endif

// Does the copying for this object
void wxPseudoMetaFile::Copy(wxPseudoMetaFile& copy)
{
  copy.Clear();

  copy.m_currentRotation = m_currentRotation;
  copy.m_width = m_width;
  copy.m_height = m_height;
  copy.m_rotateable = m_rotateable;
  copy.m_fillBrush = m_fillBrush;
  copy.m_outlinePen = m_outlinePen;
  copy.m_outlineOp = m_outlineOp;

  // Copy the GDI objects
  wxNode *node = m_gdiObjects.GetFirst();
  while (node)
  {
    wxObject *obj = (wxObject *)node->GetData();
    copy.m_gdiObjects.Append(obj);
    node = node->GetNext();
  }

  // Copy the operations
  node = m_ops.GetFirst();
  while (node)
  {
    wxDrawOp *op = (wxDrawOp *)node->GetData();
    copy.m_ops.Append(op->Copy(&copy));
    node = node->GetNext();
  }

  // Copy the outline/fill operations
  node = m_outlineColours.GetFirst();
  while (node)
  {
    copy.m_outlineColours.Append((wxObject *)node->GetData());
    node = node->GetNext();
  }
  node = m_fillColours.GetFirst();
  while (node)
  {
    copy.m_fillColours.Append((wxObject *)node->GetData());
    node = node->GetNext();
  }
}

/*
 * Pass size of existing image; scale height to
 * fit width and return new width and height.
 *
 */

bool wxPseudoMetaFile::LoadFromMetaFile(const wxString& filename, double *rwidth, double *rheight)
{
  if (!wxFileExists(filename))
    return false;

  wxXMetaFile *metaFile = new wxXMetaFile;

  if (!metaFile->ReadFile(filename))
  {
    delete metaFile;
    return false;
  }

  double lastX = 0.0;
  double lastY = 0.0;

  // Convert from metafile records to wxDrawnShape records
  wxNode *node = metaFile->metaRecords.GetFirst();
  while (node)
  {
    wxMetaRecord *record = (wxMetaRecord *)node->GetData();
    switch (record->metaFunction)
    {
      case META_SETBKCOLOR:
      {
        wxOpSetGDI *op = new wxOpSetGDI(DRAWOP_SET_BK_COLOUR, this, 0);
        op->m_r = (unsigned char)record->param1;
        op->m_g = (unsigned char)record->param2;
        op->m_b = (unsigned char)record->param3;
        m_ops.Append(op);
        break;
      }
      case META_SETBKMODE:
      {
        wxOpSetGDI *op = new wxOpSetGDI(DRAWOP_SET_BK_MODE, this, 0, (int)record->param1);
        m_ops.Append(op);
        break;
      }
      case META_SETMAPMODE:
      {
        break;
      }
//      case META_SETROP2:
//      case META_SETRELABS:
//      case META_SETPOLYFILLMODE:
//      case META_SETSTRETCHBLTMODE:
//      case META_SETTEXTCHAREXTRA:
      case META_SETTEXTCOLOR:
      {
        wxOpSetGDI *op = new wxOpSetGDI(DRAWOP_SET_TEXT_COLOUR, this, 0);
        op->m_r = (unsigned char)record->param1;
        op->m_g = (unsigned char)record->param2;
        op->m_b = (unsigned char)record->param3;
        m_ops.Append(op);
        break;
      }
//      case META_SETTEXTJUSTIFICATION:
//      case META_SETWINDOWORG:
//      case META_SETWINDOWEXT:
//      case META_SETVIEWPORTORG:
//      case META_SETVIEWPORTEXT:
//      case META_OFFSETWINDOWORG:
//      case META_SCALEWINDOWEXT:
//      case META_OFFSETVIEWPORTORG:
//      case META_SCALEVIEWPORTEXT:
      case META_LINETO:
      {
        wxOpDraw *op = new wxOpDraw(DRAWOP_DRAW_LINE, (double)lastX, (double)lastY,
                               (double)record->param1, (double)record->param2);
        m_ops.Append(op);
        break;
      }
      case META_MOVETO:
      {
        lastX = (double)record->param1;
        lastY = (double)record->param2;
        break;
      }
      case META_EXCLUDECLIPRECT:
      {
/*
        wxMetaRecord *rec = new wxMetaRecord(META_EXCLUDECLIPRECT);
        rec->param4 = getshort(handle); // m_y2
        rec->param3 = getshort(handle); // x2
        rec->param2 = getshort(handle); // y1
        rec->param1 = getshort(handle); // x1
*/
        break;
      }
      case META_INTERSECTCLIPRECT:
      {
/*
        rec->param4 = getshort(handle); // m_y2
        rec->param3 = getshort(handle); // x2
        rec->param2 = getshort(handle); // y1
        rec->param1 = getshort(handle); // x1
*/
        break;
      }
//      case META_ARC: // DO!!!
      case META_ELLIPSE:
      {
        wxOpDraw *op = new wxOpDraw(DRAWOP_DRAW_ELLIPSE,
                               (double)record->param1, (double)record->param2,
                               (double)(record->param3 - record->param1),
                               (double)(record->param4 - record->param2));
        m_ops.Append(op);
        break;
      }
//      case META_FLOODFILL:
//      case META_PIE: // DO!!!
      case META_RECTANGLE:
      {
        wxOpDraw *op = new wxOpDraw(DRAWOP_DRAW_RECT,
                               (double)record->param1, (double)record->param2,
                               (double)(record->param3 - record->param1),
                               (double)(record->param4 - record->param2));
        m_ops.Append(op);
        break;
      }
      case META_ROUNDRECT:
      {
        wxOpDraw *op = new wxOpDraw(DRAWOP_DRAW_ROUNDED_RECT,
              (double)record->param1, (double)record->param2,
              (double)(record->param3 - record->param1),
              (double)(record->param4 - record->param2), (double)record->param5);
        m_ops.Append(op);
        break;
      }
//      case META_PATBLT:
//      case META_SAVEDC:
      case META_SETPIXEL:
      {
        wxOpDraw *op = new wxOpDraw(DRAWOP_DRAW_POINT,
              (double)record->param1, (double)record->param2,
              0.0, 0.0);

//        SHOULD SET THE COLOUR - SET PEN?
//        rec->param3 = getint(handle);   // COLORREF
        m_ops.Append(op);
        break;
      }
//      case META_OFFSETCLIPRGN:
      case META_TEXTOUT:
      {
        wxOpDraw *op = new wxOpDraw(DRAWOP_DRAW_TEXT,
              (double)record->param1, (double)record->param2,
              0.0, 0.0, 0.0, record->stringParam);
        m_ops.Append(op);
        break;
      }
//      case META_BITBLT:
//      case META_STRETCHBLT:
      case META_POLYGON:
      {
        int n = (int)record->param1;
        wxRealPoint *newPoints = new wxRealPoint[n];
        for (int i = 0; i < n; i++)
        {
          newPoints[i].x = record->points[i].x;
          newPoints[i].y = record->points[i].y;
        }

        wxOpPolyDraw *op = new wxOpPolyDraw(DRAWOP_DRAW_POLYGON, n, newPoints);
        m_ops.Append(op);
        break;
      }
      case META_POLYLINE:
      {
        int n = (int)record->param1;
        wxRealPoint *newPoints = new wxRealPoint[n];
        for (int i = 0; i < n; i++)
        {
          newPoints[i].x = record->points[i].x;
          newPoints[i].y = record->points[i].y;
        }

        wxOpPolyDraw *op = new wxOpPolyDraw(DRAWOP_DRAW_POLYLINE, n, newPoints);
        m_ops.Append(op);
        break;