Method OnSizingDragLeft

ogl/basic2.cpp:1286–1391

Control points ('handles') redirect control to the actual shape, to make it easier to override sizing behaviour.

// 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!