drawn.cpp

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

    default:
      break;
  }
}

wxDrawOp *wxOpSetGDI::Copy(wxPseudoMetaFile *newImage)
{
  wxOpSetGDI *newOp = new wxOpSetGDI(m_op, newImage, m_gdiIndex, m_mode);
  newOp->m_r = m_r;
  newOp->m_g = m_g;
  newOp->m_b = m_b;
  return newOp;
}

#if wxUSE_PROLOGIO
wxExpr *wxOpSetGDI::WriteExpr(wxPseudoMetaFile *WXUNUSED(image))
{
  wxExpr *expr = new wxExpr(wxExprList);
  expr->Append(new wxExpr((long)m_op));
  switch (m_op)
  {
    case DRAWOP_SET_PEN:
    case DRAWOP_SET_BRUSH:
    case DRAWOP_SET_FONT:
    {
      expr->Append(new wxExpr((long)m_gdiIndex));
      break;
    }
    case DRAWOP_SET_TEXT_COLOUR:
    case DRAWOP_SET_BK_COLOUR:
    {
      expr->Append(new wxExpr((long)m_r));
      expr->Append(new wxExpr((long)m_g));
      expr->Append(new wxExpr((long)m_b));
      break;
    }
    case DRAWOP_SET_BK_MODE:
    {
      expr->Append(new wxExpr((long)m_mode));
      break;
    }
    default:
      break;
  }
  return expr;
}

void wxOpSetGDI::ReadExpr(wxPseudoMetaFile *WXUNUSED(image), wxExpr *expr)
{
  switch (m_op)
  {
    case DRAWOP_SET_PEN:
    case DRAWOP_SET_BRUSH:
    case DRAWOP_SET_FONT:
    {
      m_gdiIndex = (int)expr->Nth(1)->IntegerValue();
      break;
    }
    case DRAWOP_SET_TEXT_COLOUR:
    case DRAWOP_SET_BK_COLOUR:
    {
      m_r = (unsigned char)expr->Nth(1)->IntegerValue();
      m_g = (unsigned char)expr->Nth(2)->IntegerValue();
      m_b = (unsigned char)expr->Nth(3)->IntegerValue();
      break;
    }
    case DRAWOP_SET_BK_MODE:
    {
      m_mode = (int)expr->Nth(1)->IntegerValue();
      break;
    }
    default:
      break;
  }
}
#endif

/*
 * Set/destroy clipping
 *
 */

wxOpSetClipping::wxOpSetClipping(int theOp, double theX1, double theY1,
    double theX2, double theY2):wxDrawOp(theOp)
{
  m_x1 = theX1;
  m_y1 = theY1;
  m_x2 = theX2;
  m_y2 = theY2;
}

wxDrawOp *wxOpSetClipping::Copy(wxPseudoMetaFile *WXUNUSED(newImage))
{
  wxOpSetClipping *newOp = new wxOpSetClipping(m_op, m_x1, m_y1, m_x2, m_y2);
  return newOp;
}

void wxOpSetClipping::Do(wxDC& dc, double xoffset, double yoffset)
{
  switch (m_op)
  {
    case DRAWOP_SET_CLIPPING_RECT:
    {
      dc.SetClippingRegion((long)(m_x1 + xoffset), (long)(m_y1 + yoffset), (long)(m_x2 + xoffset), (long)(m_y2 + yoffset));
      break;
    }
    case DRAWOP_DESTROY_CLIPPING_RECT:
    {
      dc.DestroyClippingRegion();
      break;
    }
    default:
      break;
  }
}

void wxOpSetClipping::Scale(double xScale, double yScale)
{
  m_x1 *= xScale;
  m_y1 *= yScale;
  m_x2 *= xScale;
  m_y2 *= yScale;
}

void wxOpSetClipping::Translate(double x, double y)
{
  m_x1 += x;
  m_y1 += y;
}

#if wxUSE_PROLOGIO
wxExpr *wxOpSetClipping::WriteExpr(wxPseudoMetaFile *WXUNUSED(image))
{
  wxExpr *expr = new wxExpr(wxExprList);
  expr->Append(new wxExpr((long)m_op));
  switch (m_op)
  {
    case DRAWOP_SET_CLIPPING_RECT:
    {
      expr->Append(new wxExpr(m_x1));
      expr->Append(new wxExpr(m_y1));
      expr->Append(new wxExpr(m_x2));
      expr->Append(new wxExpr(m_y2));
      break;
    }
    default:
      break;
  }
  return expr;
}

void wxOpSetClipping::ReadExpr(wxPseudoMetaFile *WXUNUSED(image), wxExpr *expr)
{
  switch (m_op)
  {
    case DRAWOP_SET_CLIPPING_RECT:
    {
      m_x1 = expr->Nth(1)->RealValue();
      m_y1 = expr->Nth(2)->RealValue();
      m_x2 = expr->Nth(3)->RealValue();
      m_y2 = expr->Nth(4)->RealValue();
      break;
    }
    default:
      break;
  }
}
#endif

/*
 * Draw line, rectangle, rounded rectangle, ellipse, point, arc, text
 *
 */

wxOpDraw::wxOpDraw(int theOp, double theX1, double theY1, double theX2, double theY2,
         double theRadius, const wxString& s) : wxDrawOp(theOp)
{
  m_x1 = theX1;
  m_y1 = theY1;
  m_x2 = theX2;
  m_y2 = theY2;
  m_x3 = 0.0;
  m_y3 = 0.0;
  m_radius = theRadius;
  m_textString = s;
}

wxOpDraw::~wxOpDraw()
{
}

wxDrawOp *wxOpDraw::Copy(wxPseudoMetaFile *WXUNUSED(newImage))
{
  wxOpDraw *newOp = new wxOpDraw(m_op, m_x1, m_y1, m_x2, m_y2, m_radius, m_textString);
  newOp->m_x3 = m_x3;
  newOp->m_y3 = m_y3;
  return newOp;
}

void wxOpDraw::Do(wxDC& dc, double xoffset, double yoffset)
{
  switch (m_op)
  {
    case DRAWOP_DRAW_LINE:
    {
      dc.DrawLine(WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset), WXROUND(m_x2+xoffset), WXROUND(m_y2+yoffset));
      break;
    }
    case DRAWOP_DRAW_RECT:
    {
      dc.DrawRectangle(WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset), WXROUND(m_x2), WXROUND(m_y2));
      break;
    }
    case DRAWOP_DRAW_ROUNDED_RECT:
    {
      dc.DrawRoundedRectangle(WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset), WXROUND(m_x2), WXROUND(m_y2), m_radius);
      break;
    }
    case DRAWOP_DRAW_ELLIPSE:
    {
      dc.DrawEllipse(WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset), WXROUND(m_x2), WXROUND(m_y2));
      break;
    }
    case DRAWOP_DRAW_ARC:
    {
      dc.DrawArc(WXROUND(m_x2+xoffset), WXROUND(m_y2+yoffset),
                 WXROUND(m_x3+xoffset), WXROUND(m_y3+yoffset),
                 WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset));
      break;
    }
    case DRAWOP_DRAW_ELLIPTIC_ARC:
    {
      const double pi = M_PI ;

      // Convert back to degrees
      dc.DrawEllipticArc(
                 WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset),
                 WXROUND(m_x2), WXROUND(m_y2),
                 WXROUND(m_x3*(360.0/(2.0*pi))), WXROUND(m_y3*(360.0/(2.0*pi))));
      break;
    }
    case DRAWOP_DRAW_POINT:
    {
      dc.DrawPoint(WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset));
      break;
    }
    case DRAWOP_DRAW_TEXT:
    {
      dc.DrawText(m_textString, WXROUND(m_x1+xoffset), WXROUND(m_y1+yoffset));
      break;
    }
    default:
      break;
  }
}

void wxOpDraw::Scale(double scaleX, double scaleY)
{
  m_x1 *= scaleX;
  m_y1 *= scaleY;
  m_x2 *= scaleX;
  m_y2 *= scaleY;

  if (m_op != DRAWOP_DRAW_ELLIPTIC_ARC)
  {
    m_x3 *= scaleX;
    m_y3 *= scaleY;
  }

  m_radius *= scaleX;
}

void wxOpDraw::Translate(double x, double y)
{
  m_x1 += x;
  m_y1 += y;

  switch (m_op)
  {
    case DRAWOP_DRAW_LINE:
    {
      m_x2 += x;
      m_y2 += y;
      break;
    }
    case DRAWOP_DRAW_ARC:
    {
      m_x2 += x;
      m_y2 += y;
      m_x3 += x;
      m_y3 += y;
      break;
    }
    case DRAWOP_DRAW_ELLIPTIC_ARC:
    {
      break;
    }
    default:
      break;
  }
}

void wxOpDraw::Rotate(double x, double y, double theta, double sinTheta, double cosTheta)
{
  double newX1 = m_x1*cosTheta - m_y1*sinTheta + x*(1.0 - cosTheta) + y*sinTheta;
  double newY1 = m_x1*sinTheta + m_y1*cosTheta + y*(1.0 - cosTheta) + x*sinTheta;

  switch (m_op)
  {
    case DRAWOP_DRAW_LINE:
    {
      double newX2 = m_x2*cosTheta - m_y2*sinTheta + x*(1.0 - cosTheta) + y*sinTheta;
      double newY2 = m_x2*sinTheta + m_y2*cosTheta + y*(1.0 - cosTheta) + x*sinTheta;

      m_x1 = newX1;
      m_y1 = newY1;
      m_x2 = newX2;
      m_y2 = newY2;
      break;
    }
    case DRAWOP_DRAW_RECT:
    case DRAWOP_DRAW_ROUNDED_RECT:
    case DRAWOP_DRAW_ELLIPTIC_ARC:
    {
      // Assume only 0, 90, 180, 270 degree rotations.
      // oldX1, oldY1 represents the top left corner. Find the
      // bottom right, and rotate that. Then the width/height is the difference
      // between x/y values.
      double oldBottomRightX = m_x1 + m_x2;
      double oldBottomRightY = m_y1 + m_y2;
      double newBottomRightX = oldBottomRightX*cosTheta - oldBottomRightY*sinTheta + x*(1.0 - cosTheta) + y*sinTheta;
      double newBottomRightY = oldBottomRightX*sinTheta + oldBottomRightY*cosTheta + y*(1.0 - cosTheta) + x*sinTheta;

      // Now find the new top-left, bottom-right coordinates.
      double minX = wxMin(newX1, newBottomRightX);
      double minY = wxMin(newY1, newBottomRightY);
      double maxX = wxMax(newX1, newBottomRightX);
      double maxY = wxMax(newY1, newBottomRightY);

      m_x1 = minX;
      m_y1 = minY;
      m_x2 = maxX - minX; // width
      m_y2 = maxY - minY; // height

      if (m_op == DRAWOP_DRAW_ELLIPTIC_ARC)
      {
        // Add rotation to angles
        m_x3 += theta;
        m_y3 += theta;
      }

      break;
    }
    case DRAWOP_DRAW_ARC:
    {
      double newX2 = m_x2*cosTheta - m_y2*sinTheta + x*(1.0 - cosTheta) + y*sinTheta;
      double newY2 = m_x2*sinTheta + m_y2*cosTheta + y*(1.0 - cosTheta) + x*sinTheta;
      double newX3 = m_x3*cosTheta - m_y3*sinTheta + x*(1.0 - cosTheta) + y*sinTheta;
      double newY3 = m_x3*sinTheta + m_y3*cosTheta + y*(1.0 - cosTheta) + x*sinTheta;

      m_x1 = newX1;
      m_y1 = newY1;
      m_x2 = newX2;
      m_y2 = newY2;
      m_x3 = newX3;
      m_y3 = newY3;

      break;
    }
    default:
      break;
  }
}

#if wxUSE_PROLOGIO
wxExpr *wxOpDraw::WriteExpr(wxPseudoMetaFile *WXUNUSED(image))
{
  wxExpr *expr = new wxExpr(wxExprList);
  expr->Append(new wxExpr((long)m_op));
  switch (m_op)
  {
    case DRAWOP_DRAW_LINE:
    case DRAWOP_DRAW_RECT:
    case DRAWOP_DRAW_ELLIPSE:
    {
      expr->Append(new wxExpr(m_x1));
      expr->Append(new wxExpr(m_y1));
      expr->Append(new wxExpr(m_x2));
      expr->Append(new wxExpr(m_y2));
      break;
    }
    case DRAWOP_DRAW_ROUNDED_RECT:
    {
      expr->Append(new wxExpr(m_x1));
      expr->Append(new wxExpr(m_y1));
      expr->Append(new wxExpr(m_x2));
      expr->Append(new wxExpr(m_y2));
      expr->Append(new wxExpr(m_radius));
      break;
    }
    case DRAWOP_DRAW_POINT:
    {
      expr->Append(new wxExpr(m_x1));
      expr->Append(new wxExpr(m_y1));
      break;
    }
    case DRAWOP_DRAW_TEXT:
    {
      expr->Append(new wxExpr(m_x1));
      expr->Append(new wxExpr(m_y1));
      expr->Append(new wxExpr(wxExprString, m_textString));
      break;
    }
    case DRAWOP_DRAW_ARC:
    case DRAWOP_DRAW_ELLIPTIC_ARC:
    {
      expr->Append(new wxExpr(m_x1));
      expr->Append(new wxExpr(m_y1));
      expr->Append(new wxExpr(m_x2));
      expr->Append(new wxExpr(m_y2));
      expr->Append(new wxExpr(m_x3));
      expr->Append(new wxExpr(m_y3));
      break;
    }
    default:
    {
      break;
    }
  }
  return expr;
}

void wxOpDraw::ReadExpr(wxPseudoMetaFile *WXUNUSED(image), wxExpr *expr)
{
  switch (m_op)
  {
    case DRAWOP_DRAW_LINE:
    case DRAWOP_DRAW_RECT:
    case DRAWOP_DRAW_ELLIPSE:
    {
      m_x1 = expr->Nth(1)->RealValue();
      m_y1 = expr->Nth(2)->RealValue();
      m_x2 = expr->Nth(3)->RealValue();
      m_y2 = expr->Nth(4)->RealValue();
      break;
    }
    case DRAWOP_DRAW_ROUNDED_RECT:
    {
      m_x1 = expr->Nth(1)->RealValue();
      m_y1 = expr->Nth(2)->RealValue();
      m_x2 = expr->Nth(3)->RealValue();
      m_y2 = expr->Nth(4)->RealValue();
      m_radius = expr->Nth(5)->RealValue();
      break;
    }
    case DRAWOP_DRAW_POINT:
    {
      m_x1 = expr->Nth(1)->RealValue();
      m_y1 = expr->Nth(2)->RealValue();
      break;
    }
    case DRAWOP_DRAW_TEXT:
    {
      m_x1 = expr->Nth(1)->RealValue();
      m_y1 = expr->Nth(2)->RealValue();
      m_textString = wxString(expr->Nth(3)->StringValue());
      break;
    }
    case DRAWOP_DRAW_ARC:
    case DRAWOP_DRAW_ELLIPTIC_ARC:
    {
      m_x1 = expr->Nth(1)->RealValue();
      m_y1 = expr->Nth(2)->RealValue();
      m_x2 = expr->Nth(3)->RealValue();
      m_y2 = expr->Nth(4)->RealValue();
      m_x3 = expr->Nth(5)->RealValue();
      m_y3 = expr->Nth(6)->RealValue();
      break;
    }
    default:
    {
      break;
    }
  }
}
#endif

/*
 * Draw polygon, polyline, spline
 *
 */

wxOpPolyDraw::wxOpPolyDraw(int theOp, int n, wxRealPoint *thePoints):wxDrawOp(theOp)
{
  m_noPoints = n;
  m_points = thePoints;
}