wksp_shapes_line.cpp

这是一个GPS相关的程序

		}

		double	dSize	= m_iSize < 0 ? m_Size
						: m_Size + (pShape->Get_Record()->asDouble(m_iSize) - m_Size_Min) * m_dSize;

		switch( m_Size_Type )
		{
		default:
		case 0:	dSize	*= dc_Map.m_Scale;		break;
		case 1:	dSize	*= dc_Map.m_World2DC;	break;
		}

		if( dSize >= 0 )
		{
			Pen.SetWidth((int)(0.5 + dSize));
		}

		dc_Map.dc.SetPen(Pen);
	}

	//-----------------------------------------------------
	int				iPart, iPoint;
	TSG_Point_Int	A, B;

	for(iPart=0; iPart<pShape->Get_Part_Count(); iPart++)
	{
		if( pShape->Get_Point_Count(iPart) > 1 )
		{
			A		= dc_Map.World2DC(pShape->Get_Point(0, iPart));

			for(iPoint=1; iPoint<pShape->Get_Point_Count(iPart); iPoint++)
			{
				B		= A;
				A		= dc_Map.World2DC(pShape->Get_Point(iPoint, iPart));

				dc_Map.dc.DrawLine(A.x, A.y, B.x, B.y);
			}
		}
	}

	if( m_bPoints )
	{
		dc_Map.dc.SetPen(*wxBLACK_PEN);
		dc_Map.dc.SetBrush(*wxWHITE_BRUSH);

		for(iPart=0; iPart<pShape->Get_Part_Count(); iPart++)
		{
			for(iPoint=0; iPoint<pShape->Get_Point_Count(iPart); iPoint++)
			{
				A		= dc_Map.World2DC(pShape->Get_Point(iPoint, iPart));
				dc_Map.dc.DrawCircle(A.x, A.y, 2);
			}
		}
	}

	//-----------------------------------------------------
	if( bSelection )
	{
		dc_Map.dc.SetPen(m_Pen);
	}
}

//---------------------------------------------------------
void CWKSP_Shapes_Line::_Draw_Label(CWKSP_Map_DC &dc_Map, CSG_Shape *pShape)
{
	const int	m_Label_Freq	= 10,
				m_Label_Prec	= 2;

	bool			bLabel;
	int				iPart, iPoint;
	double			d;
	TSG_Point_Int	A, B;
	wxCoord			sx, sy;
	wxString		s(pShape->Get_Record()->asString(m_iLabel, m_Label_Prec));

	dc_Map.dc.GetTextExtent(s, &sx, &sy);

	//-----------------------------------------------------
	for(iPart=0; iPart<pShape->Get_Part_Count(); iPart++)
	{
		if( dc_Map.m_World2DC * ((CSG_Shape_Line *)pShape)->Get_Length(iPart) > (2 * m_Label_Freq) * sx )
		{
			A		= dc_Map.World2DC(pShape->Get_Point(0, iPart));

			for(iPoint=1, d=0.0, bLabel=false; iPoint<pShape->Get_Point_Count(iPart); iPoint++)
			{
				//-----------------------------------------
				if( !bLabel )
				{
					B		= A;
					A		= dc_Map.World2DC(pShape->Get_Point(iPoint, iPart));

					if( (d += SG_Get_Distance(A.x, A.y, B.x, B.y)) > m_Label_Freq * sx )
					{
						bLabel	= true;
						B		= A;
					}
				}

				//-----------------------------------------
				else
				{
					A		= dc_Map.World2DC(pShape->Get_Point(iPoint, iPart));

					if( SG_Get_Distance(A.x, A.y, B.x, B.y) > sx )
					{
						bLabel	= false;
						d		= 0.0;

						dc_Map.dc.DrawRotatedText(s, B.x, B.y, 
							M_RAD_TO_DEG * SG_Get_Angle_Of_Direction(B.x - A.x, A.y - B.y)
						);

					//	dc_Map.dc.DrawCircle(A.x, A.y, 3);	dc_Map.dc.DrawCircle(B.x, B.y, 3);
					}
				}
			}
		}
	}
}


///////////////////////////////////////////////////////////
//														 //
//														 //
//														 //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
#define DRAW_MOVELINE(i)	{	ptWorld	= m_Edit_pShape->Get_Point(i, m_Edit_iPart);\
								dc.DrawLine(Point.x, Point.y,\
									(int)((ptWorld.x - rWorld.Get_XMin()) / ClientToWorld),\
									(int)((rWorld.Get_YMax() - ptWorld.y) / ClientToWorld));	}

//---------------------------------------------------------
void CWKSP_Shapes_Line::_Edit_Shape_Draw_Move(wxDC &dc, CSG_Rect rWorld, double ClientToWorld, wxPoint Point)
{
	int			nPoints;
	TSG_Point	ptWorld;

	if( m_Edit_pShape && m_Edit_iPart >= 0 )
	{
		nPoints	= m_Edit_pShape->Get_Point_Count(m_Edit_iPart);

		if( m_Edit_iPoint < 0 )
		{
			if( nPoints > 0 )
			{
				DRAW_MOVELINE(nPoints - 1);
			}
		}
		else
		{
			if( nPoints > 1 )
			{
				if( m_Edit_iPoint > 0 )
					DRAW_MOVELINE(m_Edit_iPoint - 1);

				if( m_Edit_iPoint < nPoints - 1 )
					DRAW_MOVELINE(m_Edit_iPoint + 1);
			}

			CWKSP_Shapes::_Edit_Shape_Draw_Move(dc, rWorld, ClientToWorld, Point);
		}
	}
}

//---------------------------------------------------------
void CWKSP_Shapes_Line::_Edit_Shape_Draw(CWKSP_Map_DC &dc_Map)
{
	int			iPart, iPoint;
	TSG_Point_Int	ptA, ptB;

	if( m_Edit_pShape )
	{
		dc_Map.dc.SetPen(*wxBLACK_PEN);

		for(iPart=0; iPart<m_Edit_pShape->Get_Part_Count(); iPart++)
		{
			if( m_Edit_pShape->Get_Point_Count(iPart) > 1 )
			{
				ptA		= dc_Map.World2DC(m_Edit_pShape->Get_Point(0, iPart));

				for(iPoint=1; iPoint<m_Edit_pShape->Get_Point_Count(iPart); iPoint++)
				{
					ptB		= ptA;
					ptA		= dc_Map.World2DC(m_Edit_pShape->Get_Point(iPoint, iPart));

					dc_Map.dc.DrawLine(ptA.x, ptA.y, ptB.x, ptB.y);
				}
			}
		}

		CWKSP_Shapes::_Edit_Shape_Draw(dc_Map);
	}
}

//---------------------------------------------------------
int CWKSP_Shapes_Line::_Edit_Shape_HitTest(CSG_Point pos_Point, double max_Dist, int &pos_iPart, int &pos_iPoint)
{
	int			Result, iPart, iPoint;
	double		d;
	TSG_Point	A, B, Point, hit_Point;

	Result	= CWKSP_Shapes::_Edit_Shape_HitTest(pos_Point, max_Dist, pos_iPart, pos_iPoint);

	if( Result == 0 && m_Edit_pShape )
	{
		for(iPart=0; iPart<m_Edit_pShape->Get_Part_Count(); iPart++)
		{
			B	= m_Edit_pShape->Get_Point(0, iPart);

			for(iPoint=1; iPoint<m_Edit_pShape->Get_Point_Count(iPart); iPoint++)
			{
				A	= m_Edit_pShape->Get_Point(iPoint, iPart);
				d	= SG_Get_Nearest_Point_On_Line(pos_Point, A, B, Point, true);
				B	= A;

				if( d >= 0.0 && (0.0 > max_Dist || d < max_Dist) )
				{
					Result		= 2;
					max_Dist	= d;
					pos_iPoint	= iPoint;
					pos_iPart	= iPart;
					hit_Point	= Point;
				}
			}
		}

		if( Result )
		{
			pos_Point	= hit_Point;
		}
	}

	return( Result );
}

//---------------------------------------------------------
void CWKSP_Shapes_Line::_Edit_Snap_Point_ToLine(CSG_Point pos_Point, CSG_Point &snap_Point, double &snap_Dist, CSG_Shape *pShape)
{
	int			iPart, iPoint;
	double		d;
	TSG_Point	A, B, Point;

	for(iPart=0; iPart<pShape->Get_Part_Count(); iPart++)
	{
		B	= pShape->Get_Point(0, iPart);

		for(iPoint=1; iPoint<pShape->Get_Point_Count(iPart); iPoint++)
		{
			A	= pShape->Get_Point(iPoint, iPart);
			d	= SG_Get_Nearest_Point_On_Line(pos_Point, A, B, Point, true);
			B	= A;

			if( d >= 0.0 && d < snap_Dist )
			{
				snap_Dist	= d;
				snap_Point	= Point;
			}
		}
	}
}


///////////////////////////////////////////////////////////
//														 //
//														 //
//														 //
///////////////////////////////////////////////////////////

//---------------------------------------------------------