view_histogram.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_Histogram.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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//---------------------------------------------------------


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//---------------------------------------------------------
#include <wx/window.h>
#include <wx/toolbar.h>

#include "res_commands.h"
#include "res_controls.h"
#include "res_images.h"

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

#include "wksp_data_manager.h"
#include "wksp_layer_classify.h"
#include "wksp_grid.h"
#include "wksp_shapes.h"

#include "view_histogram.h"


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//---------------------------------------------------------
IMPLEMENT_CLASS(CVIEW_Histogram, CVIEW_Base);

//---------------------------------------------------------
BEGIN_EVENT_TABLE(CVIEW_Histogram, CVIEW_Base)
	EVT_PAINT			(CVIEW_Histogram::On_Paint)
	EVT_SIZE			(CVIEW_Histogram::On_Size)

	EVT_MOTION			(CVIEW_Histogram::On_Mouse_Motion)
	EVT_LEFT_DOWN		(CVIEW_Histogram::On_Mouse_LDown)
	EVT_LEFT_UP			(CVIEW_Histogram::On_Mouse_LUp)
	EVT_RIGHT_DOWN		(CVIEW_Histogram::On_Mouse_RDown)

	EVT_MENU			(ID_CMD_HISTOGRAM_CUMULATIVE	, CVIEW_Histogram::On_Cumulative)
	EVT_UPDATE_UI		(ID_CMD_HISTOGRAM_CUMULATIVE	, CVIEW_Histogram::On_Cumulative_UI)
	EVT_MENU			(ID_CMD_HISTOGRAM_AS_TABLE		, CVIEW_Histogram::On_AsTable)
END_EVENT_TABLE()


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//---------------------------------------------------------
CVIEW_Histogram::CVIEW_Histogram(CWKSP_Layer *pLayer)
	: CVIEW_Base(ID_VIEW_HISTOGRAM, pLayer->Get_Name(), ID_IMG_WND_HISTOGRAM, CVIEW_Histogram::_Create_Menu(), LNG("[CAP] Histogram"))
{
	SYS_Set_Color_BG_Window(this);

	m_pLayer		= pLayer;

	m_bCumulative	= false;
	m_bMouse_Down	= false;

	Update_Histogram();
}

//---------------------------------------------------------
CVIEW_Histogram::~CVIEW_Histogram(void)
{
	m_pLayer->View_Closes(this);
}


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//---------------------------------------------------------
wxMenu * CVIEW_Histogram::_Create_Menu(void)
{
	wxMenu	*pMenu	= new wxMenu();

	CMD_Menu_Add_Item(pMenu, true , ID_CMD_HISTOGRAM_CUMULATIVE);
	CMD_Menu_Add_Item(pMenu, false, ID_CMD_HISTOGRAM_AS_TABLE);

	return( pMenu );
}

//---------------------------------------------------------
wxToolBarBase * CVIEW_Histogram::_Create_ToolBar(void)
{
	wxToolBarBase	*pToolBar	= CMD_ToolBar_Create(ID_TB_VIEW_HISTOGRAM);

	CMD_ToolBar_Add_Item(pToolBar, true , ID_CMD_HISTOGRAM_CUMULATIVE);
	CMD_ToolBar_Add_Item(pToolBar, false, ID_CMD_HISTOGRAM_AS_TABLE);

	CMD_ToolBar_Add(pToolBar, LNG("[CAP] Histogram"));

	return( pToolBar );
}


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//---------------------------------------------------------
void CVIEW_Histogram::On_Size(wxSizeEvent &event)
{
	Refresh();

	event.Skip();
}


///////////////////////////////////////////////////////////
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//---------------------------------------------------------
wxRect CVIEW_Histogram::_Draw_Get_rDiagram(wxRect r)
{
	if( m_pLayer->Get_Classifier()->Get_Mode() == CLASSIFY_LUT )
	{
		return(	wxRect(
			wxPoint(r.GetLeft()  + 50, r.GetTop()    +  10),
			wxPoint(r.GetRight() - 10, r.GetBottom() - 100)
		));
	}

	return(	wxRect(
		wxPoint(r.GetLeft()  + 50, r.GetTop()    + 10),
		wxPoint(r.GetRight() - 10, r.GetBottom() - 40)
	));
}

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

	Draw_Edge(dc, EDGE_STYLE_SUNKEN, r);

	Draw(dc, r);
}

//---------------------------------------------------------
void CVIEW_Histogram::Draw(wxDC &dc, wxRect rDraw)
{
	wxRect		r(_Draw_Get_rDiagram(rDraw));
	wxFont		Font;

	Font.SetFamily(wxSWISS);
	dc.SetFont(Font);

	_Draw_Histogram	(dc, r);
	_Draw_Frame		(dc, r);
}

//---------------------------------------------------------
void CVIEW_Histogram::_Draw_Histogram(wxDC &dc, wxRect r)
{
	int		iClass, nClasses, ax, bx, ay, by;
	double	dx, Value;

	nClasses	= m_pLayer->Get_Classifier()->Get_Class_Count();

	dx	= (double)r.GetWidth() / (double)nClasses;
	ay	= r.GetBottom();
	bx	= r.GetLeft();

	for(iClass=0; iClass<nClasses; iClass++)
	{
		Value	= m_bCumulative
				? m_pLayer->Get_Classifier()->Histogram_Get_Cumulative(iClass)
				: m_pLayer->Get_Classifier()->Histogram_Get_Count     (iClass);

		ax	= bx;
		bx	= r.GetLeft() + (int)(dx * (iClass + 1.0));
		by	= ay - (int)(r.GetHeight() * Value);

		Draw_FillRect(dc, m_pLayer->Get_Classifier()->Get_Class_Color(iClass), ax, ay, bx, by);
	}
}

//---------------------------------------------------------
void CVIEW_Histogram::_Draw_Frame(wxDC &dc, wxRect r)
{
	const int	dyFont		= 12,
				Precision	= 3;