basic2.cpp

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

  // In case we're reading an old file, set the region's size
  if (m_regions.GetCount() == 1)
  {
    wxShapeRegion *region = (wxShapeRegion *)m_regions.GetFirst()->GetData();
    region->SetSize(m_width, m_height);
  }
}
#endif

void wxRectangleShape::Copy(wxShape& copy)
{
  wxShape::Copy(copy);

  wxASSERT( copy.IsKindOf(CLASSINFO(wxRectangleShape)) );

  wxRectangleShape& rectCopy = (wxRectangleShape&) copy;
  rectCopy.m_width = m_width;
  rectCopy.m_height = m_height;
  rectCopy.m_cornerRadius = m_cornerRadius;
}

int wxRectangleShape::GetNumberOfAttachments() const
{
  return wxShape::GetNumberOfAttachments();
}


// There are 4 attachment points on a rectangle - 0 = top, 1 = right, 2 = bottom,
// 3 = left.
bool wxRectangleShape::GetAttachmentPosition(int attachment, double *x, double *y,
                                         int nth, int no_arcs, wxLineShape *line)
{
    return wxShape::GetAttachmentPosition(attachment, x, y, nth, no_arcs, line);
}

// Text object (no box)

IMPLEMENT_DYNAMIC_CLASS(wxTextShape, wxRectangleShape)

wxTextShape::wxTextShape(double width, double height):
  wxRectangleShape(width, height)
{
}

void wxTextShape::OnDraw(wxDC& WXUNUSED(dc))
{
}

void wxTextShape::Copy(wxShape& copy)
{
  wxRectangleShape::Copy(copy);
}

#if wxUSE_PROLOGIO
void wxTextShape::WriteAttributes(wxExpr *clause)
{
  wxRectangleShape::WriteAttributes(clause);
}
#endif

// Ellipse object

IMPLEMENT_DYNAMIC_CLASS(wxEllipseShape, wxShape)

wxEllipseShape::wxEllipseShape(double w, double h)
{
  m_width = w; m_height = h;
  SetDefaultRegionSize();
}

void wxEllipseShape::GetBoundingBoxMin(double *w, double *h)
{
  *w = m_width; *h = m_height;
}

bool wxEllipseShape::GetPerimeterPoint(double x1, double y1,
                                      double x2, double y2,
                                      double *x3, double *y3)
{
  double bound_x, bound_y;
  GetBoundingBoxMax(&bound_x, &bound_y);

//  oglFindEndForBox(bound_x, bound_y, m_xpos, m_ypos, x2, y2, x3, y3);
  oglDrawArcToEllipse(m_xpos, m_ypos, bound_x, bound_y, x2, y2, x1, y1, x3, y3);

  return true;
}

void wxEllipseShape::OnDraw(wxDC& dc)
{
    if (m_shadowMode != SHADOW_NONE)
    {
      if (m_shadowBrush)
        dc.SetBrush(* m_shadowBrush);
      dc.SetPen(* g_oglTransparentPen);
      dc.DrawEllipse((long) ((m_xpos - GetWidth()/2) + m_shadowOffsetX),
                      (long) ((m_ypos - GetHeight()/2) + m_shadowOffsetY),
                      (long) GetWidth(), (long) GetHeight());
    }

    if (m_pen)
    {
      if (m_pen->GetWidth() == 0)
        dc.SetPen(* g_oglTransparentPen);
      else
        dc.SetPen(* m_pen);
    }
    if (m_brush)
      dc.SetBrush(* m_brush);
    dc.DrawEllipse((long) (m_xpos - GetWidth()/2), (long) (m_ypos - GetHeight()/2), (long) GetWidth(), (long) GetHeight());
}

void wxEllipseShape::SetSize(double x, double y, bool WXUNUSED(recursive))
{
  SetAttachmentSize(x, y);
  m_width = x;
  m_height = y;
  SetDefaultRegionSize();
}

#if wxUSE_PROLOGIO
void wxEllipseShape::WriteAttributes(wxExpr *clause)
{
  wxShape::WriteAttributes(clause);
  clause->AddAttributeValue(wxT("x"), m_xpos);
  clause->AddAttributeValue(wxT("y"), m_ypos);

  clause->AddAttributeValue(wxT("width"), m_width);
  clause->AddAttributeValue(wxT("height"), m_height);
}

void wxEllipseShape::ReadAttributes(wxExpr *clause)
{
  wxShape::ReadAttributes(clause);
  clause->AssignAttributeValue(wxT("width"), &m_width);
  clause->AssignAttributeValue(wxT("height"), &m_height);

  // In case we're reading an old file, set the region's size
  if (m_regions.GetCount() == 1)
  {
    wxShapeRegion *region = (wxShapeRegion *)m_regions.GetFirst()->GetData();
    region->SetSize(m_width, m_height);
  }
}
#endif

void wxEllipseShape::Copy(wxShape& copy)
{
  wxShape::Copy(copy);

  wxASSERT( copy.IsKindOf(CLASSINFO(wxEllipseShape)) );

  wxEllipseShape& ellipseCopy = (wxEllipseShape&) copy;

  ellipseCopy.m_width = m_width;
  ellipseCopy.m_height = m_height;
}

int wxEllipseShape::GetNumberOfAttachments() const
{
  return wxShape::GetNumberOfAttachments();
}

// There are 4 attachment points on an ellipse - 0 = top, 1 = right, 2 = bottom,
// 3 = left.
bool wxEllipseShape::GetAttachmentPosition(int attachment, double *x, double *y,
                                         int nth, int no_arcs, wxLineShape *line)
{
  if (m_attachmentMode == ATTACHMENT_MODE_BRANCHING)
    return wxShape::GetAttachmentPosition(attachment, x, y, nth, no_arcs, line);

  if (m_attachmentMode != ATTACHMENT_MODE_NONE)
  {
    double top = (double)(m_ypos + m_height/2.0);
    double bottom = (double)(m_ypos - m_height/2.0);
    double left = (double)(m_xpos - m_width/2.0);
    double right = (double)(m_xpos + m_width/2.0);

    int physicalAttachment = LogicalToPhysicalAttachment(attachment);

    switch (physicalAttachment)
    {
      case 0:
      {
        if (m_spaceAttachments)
          *x = left + (nth + 1)*m_width/(no_arcs + 1);
        else *x = m_xpos;
        *y = top;
        // We now have the point on the bounding box: but get the point on the ellipse
        // by imagining a vertical line from (*x, m_ypos - m_height- 500) to (*x, m_ypos) intersecting
        // the ellipse.
        oglDrawArcToEllipse(m_xpos, m_ypos, m_width, m_height, *x, (double)(m_ypos-m_height-500), *x, m_ypos, x, y);
        break;
      }
      case 1:
      {
        *x = right;
        if (m_spaceAttachments)
          *y = bottom + (nth + 1)*m_height/(no_arcs + 1);
        else *y = m_ypos;
        oglDrawArcToEllipse(m_xpos, m_ypos, m_width, m_height, (double)(m_xpos+m_width+500), *y, m_xpos, *y, x, y);
        break;
      }
      case 2:
      {
        if (m_spaceAttachments)
          *x = left + (nth + 1)*m_width/(no_arcs + 1);
        else *x = m_xpos;
        *y = bottom;
        oglDrawArcToEllipse(m_xpos, m_ypos, m_width, m_height, *x, (double)(m_ypos+m_height+500), *x, m_ypos, x, y);
        break;
      }
      case 3:
      {
        *x = left;
        if (m_spaceAttachments)
          *y = bottom + (nth + 1)*m_height/(no_arcs + 1);
        else *y = m_ypos;
        oglDrawArcToEllipse(m_xpos, m_ypos, m_width, m_height, (double)(m_xpos-m_width-500), *y, m_xpos, *y, x, y);
        break;
      }
      default:
      {
        return wxShape::GetAttachmentPosition(attachment, x, y, nth, no_arcs, line);
      }
    }
    return true;
  }
  else
  { *x = m_xpos; *y = m_ypos; return true; }
}


// Circle object
IMPLEMENT_DYNAMIC_CLASS(wxCircleShape, wxEllipseShape)

wxCircleShape::wxCircleShape(double diameter):wxEllipseShape(diameter, diameter)
{
    SetMaintainAspectRatio(true);
}

void wxCircleShape::Copy(wxShape& copy)
{
  wxEllipseShape::Copy(copy);
}

bool wxCircleShape::GetPerimeterPoint(double WXUNUSED(x1), double WXUNUSED(y1),
                                      double x2, double y2,
                                      double *x3, double *y3)
{
  oglFindEndForCircle(m_width/2,
                      m_xpos, m_ypos,  // Centre of circle
                      x2, y2,  // Other end of line
                      x3, y3);

  return true;
}

// Control points

double wxControlPoint::sm_controlPointDragStartX = 0.0;
double wxControlPoint::sm_controlPointDragStartY = 0.0;
double wxControlPoint::sm_controlPointDragStartWidth = 0.0;
double wxControlPoint::sm_controlPointDragStartHeight = 0.0;
double wxControlPoint::sm_controlPointDragEndWidth = 0.0;
double wxControlPoint::sm_controlPointDragEndHeight = 0.0;
double wxControlPoint::sm_controlPointDragPosX = 0.0;
double wxControlPoint::sm_controlPointDragPosY = 0.0;

IMPLEMENT_DYNAMIC_CLASS(wxControlPoint, wxRectangleShape)

wxControlPoint::wxControlPoint(wxShapeCanvas *theCanvas, wxShape *object, double size, double the_xoffset, double the_yoffset, int the_type):wxRectangleShape(size, size)
{
  m_canvas = theCanvas;
  m_shape = object;
  m_xoffset = the_xoffset;
  m_yoffset = the_yoffset;
  m_type = the_type;
  SetPen(g_oglBlackForegroundPen);
  SetBrush(wxBLACK_BRUSH);
  m_oldCursor = NULL;
  m_visible = true;
  m_eraseObject = true;
}

wxControlPoint::~wxControlPoint()
{
}

// Don't even attempt to draw any text - waste of time!
void wxControlPoint::OnDrawContents(wxDC& WXUNUSED(dc))
{
}

void wxControlPoint::OnDraw(wxDC& dc)
{
  m_xpos = m_shape->GetX() + m_xoffset;
  m_ypos = m_shape->GetY() + m_yoffset;
  wxRectangleShape::OnDraw(dc);
}

void wxControlPoint::OnErase(wxDC& dc)
{
  wxRectangleShape::OnErase(dc);
}

// Implement resizing of canvas object
void wxControlPoint::OnDragLeft(bool draw, double x, double y, int keys, int attachment)
{
    m_shape->GetEventHandler()->OnSizingDragLeft(this, draw, x, y, keys, attachment);
}

void wxControlPoint::OnBeginDragLeft(double x, double y, int keys, int attachment)
{
    m_shape->GetEventHandler()->OnSizingBeginDragLeft(this, x, y, keys, attachment);
}

void wxControlPoint::OnEndDragLeft(double x, double y, int keys, int attachment)
{
    m_shape->GetEventHandler()->OnSizingEndDragLeft(this, x, y, keys, attachment);
}

int wxControlPoint::GetNumberOfAttachments() const
{
  return 1;
}

bool wxControlPoint::GetAttachmentPosition(int WXUNUSED(attachment), double *x, double *y,
                                         int WXUNUSED(nth), int WXUNUSED(no_arcs), wxLineShape *WXUNUSED(line))
{
  *x = m_xpos; *y = m_ypos;
  return true;
}

// Control points ('handles') redirect control to the actual shape, to make it easier
// to override sizing behaviour.
void wxShape::OnSizingDragLeft(wxControlPoint* pt, bool WXUNUSED(draw), double x, double y, int keys, int WXUNUSED(attachment))
{
  double bound_x;
  double bound_y;
  this->GetBoundingBoxMin(&bound_x, &bound_y);

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

  dc.SetLogicalFunction(OGLRBLF);

  wxPen dottedPen(*wxBLACK, 1, wxDOT);
  dc.SetPen(dottedPen);
  dc.SetBrush((* wxTRANSPARENT_BRUSH));

  if (this->GetCentreResize())
  {
    // Maintain the same centre point.
    double new_width = (double)(2.0*fabs(x - this->GetX()));
    double new_height = (double)(2.0*fabs(y - this->GetY()));

    // Constrain sizing according to what control point you're dragging
    if (pt->m_type == CONTROL_POINT_HORIZONTAL)
    {
        if (GetMaintainAspectRatio())
        {
            new_height = bound_y*(new_width/bound_x);
        }
        else
            new_height = bound_y;
    }
    else if (pt->m_type == CONTROL_POINT_VERTICAL)
    {
        if (GetMaintainAspectRatio())
        {
            new_width = bound_x*(new_height/bound_y);
        }
        else
            new_width = bound_x;
    }
    else if (pt->m_type == CONTROL_POINT_DIAGONAL && (keys & KEY_SHIFT))
      new_height = bound_y*(new_width/bound_x);

    if (this->GetFixedWidth())
      new_width = bound_x;

    if (this->GetFixedHeight())
      new_height = bound_y;

    pt->sm_controlPointDragEndWidth = new_width;
    pt->sm_controlPointDragEndHeight = new_height;

    this->GetEventHandler()->OnDrawOutline(dc, this->GetX(), this->GetY(),
                                new_width, new_height);
  }
  else
  {
    // Don't maintain the same centre point!
    double newX1 = wxMin(pt->sm_controlPointDragStartX, x);
    double newY1 = wxMin(pt->sm_controlPointDragStartY, y);
    double newX2 = wxMax(pt->sm_controlPointDragStartX, x);
    double newY2 = wxMax(pt->sm_controlPointDragStartY, y);
    if (pt->m_type == CONTROL_POINT_HORIZONTAL)
    {
      newY1 = pt->sm_controlPointDragStartY;
      newY2 = newY1 + pt->sm_controlPointDragStartHeight;
    }
    else if (pt->m_type == CONTROL_POINT_VERTICAL)
    {
      newX1 = pt->sm_controlPointDragStartX;
      newX2 = newX1 + pt->sm_controlPointDragStartWidth;
    }
    else if (pt->m_type == CONTROL_POINT_DIAGONAL && ((keys & KEY_SHIFT) || GetMaintainAspectRatio()))
    {
      double newH = (double)((newX2 - newX1)*(pt->sm_controlPointDragStartHeight/pt->sm_controlPointDragStartWidth));
      if (GetY() > pt->sm_controlPointDragStartY)
        newY2 = (double)(newY1 + newH);
      else
        newY1 = (double)(newY2 - newH);
    }
    double newWidth = (double)(newX2 - newX1);
    double newHeight = (double)(newY2 - newY1);

    if (pt->m_type == CONTROL_POINT_VERTICAL && GetMaintainAspectRatio())
    {
        newWidth = bound_x * (newHeight/bound_y) ;
    }

    if (pt->m_type == CONTROL_POINT_HORIZONTAL && GetMaintainAspectRatio())
    {
        newHeight = bound_y * (newWidth/bound_x) ;
    }

    pt->sm_controlPointDragPosX = (double)(newX1 + (newWidth/2.0));
    pt->sm_controlPointDragPosY = (double)(newY1 + (newHeight/2.0));
    if (this->GetFixedWidth())
      newWidth = bound_x;

    if (this->GetFixedHeight())
      newHeight = bound_y;

    pt->sm_controlPointDragEndWidth = newWidth;
    pt->sm_controlPointDragEndHeight = newHeight;
    this->GetEventHandler()->OnDrawOutline(dc, pt->sm_controlPointDragPosX, pt->sm_controlPointDragPosY, newWidth, newHeight);
  }
}

void wxShape::OnSizingBeginDragLeft(wxControlPoint* pt, double x, double y, int keys, int WXUNUSED(attachment))
{
  m_canvas->CaptureMouse();

  wxClientDC dc(GetCanvas());
  GetCanvas()->PrepareDC(dc);
/*
  if (pt->m_eraseObject)
    this->Erase(dc);
*/

  dc.SetLogicalFunction(OGLRBLF);

  double bound_x;
  double bound_y;
  this->GetBoundingBoxMin(&bound_x, &bound_y);
  this->GetEventHandler()->OnBeginSize(bound_x, bound_y);

  // Choose the 'opposite corner' of the object as the stationary
  // point in case this is non-centring resizing.
  if (pt->GetX() < this->GetX())
    pt->sm_controlPointDragStartX = (double)(this->GetX() + (bound_x/2.0));
  else
    pt->sm_controlPointDragStartX = (double)(this->GetX() - (bound_x/2.0));

  if (pt->GetY() < this->GetY())
    pt->sm_controlPointDragStartY = (double)(this->GetY() + (bound_y/2.0));
  else
    pt->sm_controlPointDragStartY = (double)(this->GetY() - (bound_y/2.0));