view_ruler.cpp

这是一个GPS相关的程序

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//                                                       //
//                         SAGA                          //
//                                                       //
//      System for Automated Geoscientific Analyses      //
//                                                       //
//                    User Interface                     //
//                                                       //
//                    Program: SAGA                      //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//                    VIEW_Ruler.cpp                     //
//                                                       //
//          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; version 2 of the License.   //
//                                                       //
// 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,       //
// write to the Free Software Foundation, Inc.,          //
// 59 Temple Place - Suite 330, Boston, MA 02111-1307,   //
// USA.                                                  //
//                                                       //
//-------------------------------------------------------//
//                                                       //
//    contact:    Olaf Conrad                            //
//                Institute of Geography                 //
//                University of Goettingen               //
//                Goldschmidtstr. 5                      //
//                37077 Goettingen                       //
//                Germany                                //
//                                                       //
//    e-mail:     [e-mail]                   //
//                                                       //
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//---------------------------------------------------------
#include <math.h>

#include <wx/wx.h>

#include "helper.h"
#include "dc_helper.h"

#include "view_layout.h"
#include "view_ruler.h"


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//---------------------------------------------------------
BEGIN_EVENT_TABLE(CVIEW_Ruler, wxPanel)
	EVT_PAINT			(CVIEW_Ruler::On_Paint)
END_EVENT_TABLE()


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//---------------------------------------------------------
CVIEW_Ruler::CVIEW_Ruler(wxWindow *pParent, int Style)
	: wxPanel(pParent, -1, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE)
{
	SYS_Set_Color_BG_Window(this);

	m_bHorizontal	= (Style & RULER_VERTICAL)     == false;
	m_bAscendent	= (Style & RULER_DESCENDING)   == false;
	m_bTickAtTop	= (Style & RULER_TICKATBOTTOM) == false;
	m_Mode			= (Style & RULER_MODE_SCALE) ? 1 : ((Style & RULER_MODE_CORNERS) ? 2 : 0);
	m_Edge			= (Style & RULER_EDGE_BLACK) ? 1 : ((Style & RULER_EDGE_SUNKEN)  ? 2 : 0);

	m_Position		= -1;
	m_Min			= 0;
	m_Max			= 1;
	m_Min_Core		= 1;
	m_Max_Core		= 0;
}

//---------------------------------------------------------
CVIEW_Ruler::~CVIEW_Ruler(void)
{
}


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//---------------------------------------------------------
void CVIEW_Ruler::On_Paint(wxPaintEvent &event)
{
	int			Width, Height;
	wxRect		r(wxPoint(0, 0), GetClientSize());
	wxPaintDC	dc(this);

	//-----------------------------------------------------
	Width	= m_bHorizontal ? r.GetWidth() : r.GetHeight();
	Height	= m_bHorizontal ? r.GetHeight() : r.GetWidth();

	_Draw_Core(dc, Width, Height);

	//-----------------------------------------------------
	switch( m_Mode )
	{
	case 0:	default:
		Draw_Scale(dc, r, m_Min, m_Max        , m_bHorizontal, m_bAscendent, m_bTickAtTop);
		break;

	case 1:
		Draw_Scale(dc, r, 0.0  , m_Max - m_Min, m_bHorizontal, m_bAscendent, m_bTickAtTop);
		break;

	case 2:
		_Draw_Corners(dc, Width, Height);
		break;
	}

	//-----------------------------------------------------
	switch( m_Edge )
	{
	case 0:	default:
		break;

	case 1:
		Draw_Edge(dc, EDGE_STYLE_SIMPLE, 0, 0, GetClientSize().x - 1, GetClientSize().y - 1);
		break;

	case 2:
		Draw_Edge(dc, EDGE_STYLE_SUNKEN, 0, 0, GetClientSize().x - 1, GetClientSize().y - 1);
		break;
	}

	//-----------------------------------------------------
	_Draw_Position(dc, Width, Height, m_Position);
}


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//---------------------------------------------------------
#define TEXTSPACE	4

//---------------------------------------------------------
void CVIEW_Ruler::_Draw_Corners(wxDC &dc, int Width, int Height)
{
	wxFont	Font;

	Font.Create((int)(0.65 * (double)Height), wxSWISS, wxNORMAL, wxNORMAL);
	dc.SetFont(Font);

	if( m_bHorizontal )
	{
		Draw_Text(dc, TEXTALIGN_BOTTOMLEFT ,         TEXTSPACE, Height, wxString::Format(wxT("%f"), m_Min));
		Draw_Text(dc, TEXTALIGN_BOTTOMRIGHT, Width - TEXTSPACE, Height, wxString::Format(wxT("%f"), m_Max));
	}
	else
	{
		Draw_Text(dc, TEXTALIGN_TOPLEFT , 0, Width - TEXTSPACE, 90.0, wxString::Format(wxT("%f"), m_Min));
		Draw_Text(dc, TEXTALIGN_TOPRIGHT, 0,         TEXTSPACE, 90.0, wxString::Format(wxT("%f"), m_Max));
	}
}

//---------------------------------------------------------
void CVIEW_Ruler::_Draw_Core(wxDC &dc, int Width, int Height)
{
	double		x;

	if( m_Min < m_Max && m_Min_Core < m_Max_Core )
	{
		if( m_Min_Core > m_Min )
		{
			x	= (m_Min_Core - m_Min) * (double)Width / (m_Max - m_Min);

			if( m_bHorizontal )
			{
				Draw_FillRect(dc, SYS_Get_Color(wxSYS_COLOUR_3DFACE), 0, 0, (int)x, Height);
			}
			else
			{
				Draw_FillRect(dc, SYS_Get_Color(wxSYS_COLOUR_3DFACE), 0, 0, Height, (int)x);
			}
		}

		if( m_Max_Core < m_Max )
		{
			x	= (m_Max_Core - m_Min) * (double)Width / (m_Max - m_Min);

			if( m_bHorizontal )
			{
				Draw_FillRect(dc, SYS_Get_Color(wxSYS_COLOUR_3DFACE), (int)x, 0, Width, Height);
			}
			else
			{
				Draw_FillRect(dc, SYS_Get_Color(wxSYS_COLOUR_3DFACE), 0, (int)x, Height, Width);
			}
		}
	}
}


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//---------------------------------------------------------
void CVIEW_Ruler::Set_Range(double Min, double Max)
{
	if( m_Min != Min || m_Max != Max )
	{
		m_Min	= Min;
		m_Max	= Max;

		Refresh();
	}
}

//---------------------------------------------------------
void CVIEW_Ruler::Set_Range_Core(double Min, double Max)
{
	if( m_Min_Core != Min || m_Max_Core != Max )
	{
		m_Min_Core	= Min;
		m_Max_Core	= Max;

		Refresh();
	}
}


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//---------------------------------------------------------
void CVIEW_Ruler::Set_Position(int Position)
{
	int			Width, Height;
	wxClientDC	dc(this);

	Width		= m_bHorizontal ? GetClientSize().x : GetClientSize().y;
	Height		= m_bHorizontal ? GetClientSize().y : GetClientSize().x;

	_Draw_Position(dc, Width, Height, m_Position);

	m_Position	= Position;

	_Draw_Position(dc, Width, Height, m_Position);
}

//---------------------------------------------------------
void CVIEW_Ruler::_Draw_Position(wxDC &dc, int Width, int Height, int Position)
{
	if( m_Position >= 0 && m_Position < Width )
	{
		int		lf	= dc.GetLogicalFunction();

		dc.SetLogicalFunction(wxINVERT);

		if( m_bHorizontal )
		{
			dc.DrawLine(Position, 0, Position, Height);
		}
		else
		{
			dc.DrawLine(0, Position, Height, Position);
		}

		dc.SetLogicalFunction(lf);
	}
}


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