Method OnSizingBeginDragLeft

ogl/basic2.cpp:1393–1524

}

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));

  if (pt->m_type == CONTROL_POINT_HORIZONTAL)
    pt->sm_controlPointDragStartY = (double)(this->GetY() - (bound_y/2.0));
  else if (pt->m_type == CONTROL_POINT_VERTICAL)
    pt->sm_controlPointDragStartX = (double)(this->GetX() - (bound_x/2.0));

  // We may require the old width and height.
  pt->sm_controlPointDragStartWidth = bound_x;
  pt->sm_controlPointDragStartHeight = bound_y;

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

  if (this->GetCentreResize())
  {
    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;
    }