
///////////////////////////////////////////////////////////
//                                                       //
//                         SAGA                          //
//                                                       //
//      System for Automated Geoscientific Analyses      //
//                                                       //
//                    User Interface                     //
//                                                       //
//                    Program: SAGA                      //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//                  VIEW_Map_Control.h                   //
//                                                       //
//          Copyright (C) 2005 by Olaf Conrad            //
//                                                       //
//-------------------------------------------------------//
//                                                       //
// This file is part of 'SAGA - System for Automated     //
// Geoscientific Analyses'. SAGA is free software; you   //
// can redistribute it and/or modify it under the terms  //
// of the GNU General Public License as published by the //
// Free Software Foundation, either version 2 of the     //
// License, or (at your option) any later version.       //
//                                                       //
// SAGA is distributed in the hope that it will be       //
// useful, but WITHOUT ANY WARRANTY; without even the    //
// implied warranty of MERCHANTABILITY or FITNESS FOR A  //
// PARTICULAR PURPOSE. See the GNU General Public        //
// License for more details.                             //
//                                                       //
// You should have received a copy of the GNU General    //
// Public License along with this program; if not, see   //
// <http://www.gnu.org/licenses/>.                       //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//    contact:    Olaf Conrad                            //
//                Institute of Geography                 //
//                University of Goettingen               //
//                Goldschmidtstr. 5                      //
//                37077 Goettingen                       //
//                Germany                                //
//                                                       //
//    e-mail:     oconrad@saga-gis.org                   //
//                                                       //
///////////////////////////////////////////////////////////

//---------------------------------------------------------
#ifndef _HEADER_INCLUDED__SAGA_GUI__VIEW_Map_Control_H
#define _HEADER_INCLUDED__SAGA_GUI__VIEW_Map_Control_H


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

//---------------------------------------------------------
#include <wx/panel.h>
#include <wx/bitmap.h>

#include <saga_api/saga_api.h>


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

//---------------------------------------------------------
enum
{
	MAP_MODE_NONE	= 0,
	MAP_MODE_SELECT,
	MAP_MODE_DISTANCE,
	MAP_MODE_DISTANCE_GET,
	MAP_MODE_ZOOM,
	MAP_MODE_PAN,
	MAP_MODE_PAN_DOWN
};


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

//---------------------------------------------------------
class CVIEW_Map_Control : public wxPanel
{
private:

	class CMeasure
	{
	public:
		CMeasure(void)
		{
			m_Parameters.Create(_TL("Measure"));
			m_Parameters.Add_Choice("", "TYPE"  , _TL("Measure"), _TL(""), CSG_String::Format("%s|%s", _TL("Distance"), _TL("Area")), 0);
			m_Parameters.Add_Double("", "LENGTH", _TL("Length" ), _TL(""), 0., 0., true);
			m_Parameters.Add_Double("", "AREA"  , _TL("Area"   ), _TL(""), 0., 0., true);
			m_Parameters.Add_Double("", "SCALE" , _TL("Scale"  ), _TL(""), m_Scale, 0., true);
		}

		bool			Dialog			(void)
		{
			m_Parameters["LENGTH"].Set_Value(m_Length);
			m_Parameters["AREA"  ].Set_Value(m_Area  );
			m_Parameters.Set_Enabled("AREA", Get_Type() == 1);

			if( SG_UI_Dlg_Parameters(&m_Parameters, _TL("Measure")) )
			{
				m_Scale = m_Parameters("SCALE")->asDouble();

				return( true );
			}

			return( false );
		}

		bool			Get_Type		(void)	const	{ return( m_Parameters("TYPE")->asInt() ); }

		void			Reset			(void)			{ m_Points.Clear(); m_Length = m_Area = 0.; }

		int				Count			(void)	const	{ return( m_Points.Get_Count() ); }
		TSG_Point &		operator []		(int i)			{ return( m_Points[i] ); }

		double			Get_Length		(void)	const	{ return( m_Length * m_Scale         ); }
		double			Get_Area		(void)	const	{ return( m_Area   * m_Scale*m_Scale ); }

		double			Get_Length		(const CSG_Point &Point)	const
		{
			return( Count() > 0 ? (m_Length + SG_Get_Distance(Point, m_Points[Count() - 1])) * m_Scale : 0. );
		}

		void			Add				(const CSG_Point &Point)
		{
			m_Points.Add(Point);

			if( m_Points.Get_Count() > 1 )
			{
				m_Length += SG_Get_Distance(m_Points[Count() - 2], m_Points[Count() - 1]);

				if( m_Points.Get_Count() > 2 )
				{
					m_Area = fabs(SG_Get_Polygon_Area(m_Points));
				}
			}
		}

		double			Get_Area		(const CSG_Point &Point)	const
		{
			CSG_Points Points(m_Points); Points.Add(Point); return( fabs(SG_Get_Polygon_Area(Points)) * m_Scale*m_Scale );
		}

		wxString		Get_Measure		(void)                   const { return( Get_Type() == 0 ? wxString::Format("D %f", Get_Length(     )) : wxString::Format("A %f", Get_Area(     )) ); }
		wxString		Get_Measure		(const CSG_Point &Point) const { return( Get_Type() == 0 ? wxString::Format("D %f", Get_Length(Point)) : wxString::Format("A %f", Get_Area(Point)) ); }


	private:

		double			m_Length { 0. }, m_Area { 0. }, m_Scale { 1. };

		CSG_Points		m_Points;

		CSG_Parameters	m_Parameters;

	};


public:
	CVIEW_Map_Control(class CVIEW_Map *pParent, class CWKSP_Map *pMap);
	virtual ~CVIEW_Map_Control(void);

	void						On_Paint			(wxPaintEvent &event);
	void						On_Size				(wxSizeEvent  &event);
	void						On_Key_Down			(wxKeyEvent   &event);

	void						On_Mouse_LDown		(wxMouseEvent &event);
	void						On_Mouse_LUp		(wxMouseEvent &event);
	void						On_Mouse_LDClick	(wxMouseEvent &event);
	void						On_Mouse_RDown		(wxMouseEvent &event);
	void						On_Mouse_RUp		(wxMouseEvent &event);
	void						On_Mouse_RDClick	(wxMouseEvent &event);
	void						On_Mouse_MDown		(wxMouseEvent &event);
	void						On_Mouse_MUp		(wxMouseEvent &event);
	void						On_Mouse_Motion		(wxMouseEvent &event);
	void						On_Mouse_Wheel		(wxMouseEvent &event);

	void						On_Mouse_Lost		(wxMouseCaptureLostEvent &event);

	void						Set_CrossHair		(const TSG_Point &Point);
	void						Set_CrossHair_Off	(void);

	bool						Set_Mode			(int Mode);
	int							Get_Mode			(void)	{	return( m_Mode );	}

	void						Refresh_Map			(void);


private:

	int							m_Mode, m_Mode_Previous, m_Drag_Mode;

	wxPoint						m_Mouse_Down, m_Mouse_Move, m_CrossHair;
	
	wxBitmap					m_Bitmap;

	CMeasure					m_Measure;

	class CVIEW_Map				*m_pParent;

	class CWKSP_Map				*m_pMap;

	int 						m_Mouse_Wheel_Accumulator = 0;


	bool						_Update_Bitmap_Size	(void);

	void						_Set_StatusBar		(const TSG_Point &Point);

	wxPoint						_Get_World2Client	(const TSG_Point &Point);
	CSG_Point					_Get_Client2World	(const   wxPoint &Point, bool bToActive = false);
	double						_Get_Client2World	(double Length         , bool bToActive = false);

	bool						_Check_Interactive	(bool bProjection = true);

	void						_Draw_CrossHair		(wxDC &dc);
	void						_Draw_Measure		(wxDC &dc);
	void						_Draw_Drag			(wxDC &dc);
	void						_Draw_Pan			(wxDC &dc);
	void						_Draw_Edit_Moves	(wxDC &dc);

	bool						_Zoom				(const wxPoint &A, const wxPoint &B, bool bZoomIn);
	bool						_Zoom				(const wxPoint &A                  , bool bZoomIn);
	bool						_Zoom				(                                    bool bZoomIn);

	bool						_Move				(      wxPoint &A, const wxPoint &B, bool bUpdate = false);
	bool						_Move				(const wxPoint &A                  , bool bUpdate = false);


	//-----------------------------------------------------
	DECLARE_EVENT_TABLE()
};


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

//---------------------------------------------------------
#endif // #ifndef _HEADER_INCLUDED__SAGA_GUI__VIEW_Map_Control_H
