OAG Library (OpenGL) Part 1 - Setting Up the Library for an MFC Application

// OAGMFCDoc.cpp : implementation of the COAGMFCDoc class
//

#include "stdafx.h"
#include "OAGMFC.h"

#include "OAGMFCDoc.h"

#include <OAGPrimitives.h>
#include <OAGTextureLoader.h>
#include <OAGFontLoader.h>
#include <OAGParser.h>

#include <XmlDocument.h>
#include <XmlWriterDocument.h>

#include "OAGMFCView.h"

//#include <OAGFont2D.h>
//#include <OAGTextureLoader.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// COAGMFCDoc

IMPLEMENT_DYNCREATE(COAGMFCDoc, CDocument)

BEGIN_MESSAGE_MAP(COAGMFCDoc, CDocument)
	ON_COMMAND(ID_FILE_OPEN, &COAGMFCDoc::OnFileOpen)
	ON_COMMAND(ID_FILE_SAVE, &COAGMFCDoc::OnFileSave)
	ON_COMMAND(ID_INSERT_TEXTURE, &COAGMFCDoc::OnInsertTexture)
	ON_COMMAND(ID_INSERT_FONT, &COAGMFCDoc::OnInsertFont)
END_MESSAGE_MAP()


// COAGMFCDoc construction/destruction

COAGMFCDoc::COAGMFCDoc()
{
	CreateLibraryObjects();
}

COAGMFCDoc::~COAGMFCDoc()
{
	UnloadLibraryObjects();
}

BOOL COAGMFCDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	//Deleting all library objects when a new document is started.
	//The Fonts must be deleted and created again,
	//if not they are not drawn properly
	UnloadLibraryObjects();
	CreateLibraryObjects();
	
	UpdateAllViews(NULL);

	return TRUE;
}

// COAGMFCDoc serialization

void COAGMFCDoc::Serialize(CArchive& ar)
{
	if (ar.IsStoring())
	{
		// TODO: add storing code here
	}
	else
	{
		// TODO: add loading code here
	}
}


// COAGMFCDoc diagnostics

#ifdef _DEBUG
void COAGMFCDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void COAGMFCDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG


// COAGMFCDoc commands

void COAGMFCDoc::CreateLibraryObjects()
{
	m_pScene = new oag::OAGScene();

	m_pTextureMappingTable = new oag::TextureMappingTable();
	m_pScene->SetTextureMappingTable( m_pTextureMappingTable );

	m_pFontMappingTable = new oag::FontMappingTable();
	m_pScene->SetFontMappingTable( m_pFontMappingTable );
}

void COAGMFCDoc::UnloadLibraryObjects()
{
	//Deletes the scene and all objects from the memory
	if ( m_pScene )
	{
		m_pScene->DeleteAllObjects();

		delete m_pScene;
		m_pScene = NULL;
	}

	if( m_pTextureMappingTable )
	{
		delete m_pTextureMappingTable;
		m_pTextureMappingTable = NULL;
	}

	if( m_pFontMappingTable )
	{
		delete m_pFontMappingTable;
		m_pFontMappingTable = NULL;
	}
}

void COAGMFCDoc::CreateNewGeometry2D(int nType)
{
	switch( nType )
	{
	case 1: //Line
		{
			oag::OAGPrimitives* pGeo = new oag::OAGPrimitives();
			pGeo->SetGeometryType( GL_LINES );
			m_pScene->AddObject( pGeo );
		}
		break;
	case 2: //Polyline
		{
			oag::OAGPrimitives* pGeo = new oag::OAGPrimitives();
			pGeo->SetGeometryType( GL_LINE_STRIP );
			m_pScene->AddObject( pGeo );
		}
		break;
	case 3: //Rectangle
		{
			oag::OAGPrimitives* pGeo = new oag::OAGPrimitives();
			pGeo->SetGeometryType( GL_QUADS );
			m_pScene->AddObject( pGeo );
		}
		break;
	case 4: //Triangle
		{
			oag::OAGPrimitives* pGeo = new oag::OAGPrimitives();
			pGeo->SetGeometryType( GL_TRIANGLES );
			m_pScene->AddObject( pGeo );
		}
		break;

	}
}


void COAGMFCDoc::OnFileOpen()
{
	CString filter;
	filter.LoadString( IDS_OAGXML );

	CFileDialog dlg(TRUE, "*.oagxml", NULL, OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST, filter );

	if(dlg.DoModal() == IDOK)
	{
		m_pScene->DeleteAllObjects();

		SetPathName( dlg.GetPathName() );

		POSITION pos = GetFirstViewPosition();
		COAGMFCView* pView =  (COAGMFCView*) GetNextView(pos);

		if ( pView->m_pWinGraphicContext->MakeCurrent() )
		{
			oag::OAGParser parser;
			parser.LoadFile( dlg.GetPathName().GetString(), m_pScene );
			pView->m_pWinGraphicContext->DeleteCurrent();

			UpdateAllViews(NULL);
		}

		AfxMessageBox("File Loaded");
	}
}

void COAGMFCDoc::OnFileSave()
{
#if defined(LIBXML_WRITER_ENABLED) && defined(LIBXML_OUTPUT_ENABLED)

#define MY_ENCODING "ISO-8859-1"


	CString fileSave = GetPathName();

	if ( fileSave.IsEmpty() )
	{
		CString filter;
		filter.LoadString( IDS_OAGXML );

		CFileDialog dlg(FALSE, "*.oagxml", NULL, OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST, filter );

		if(	dlg.DoModal() == IDOK )
		{
			fileSave = dlg.GetPathName().GetString();
		}

	}

	if ( !fileSave.IsEmpty() )
	{
		CXmlWriterDocument writerDoc;

		CXmlNode* nodeRoot = new CXmlNode("OAGLibrary");

		CXmlNode* nodeScene = new CXmlNode("Scene");
		nodeRoot->AppendChild( nodeScene );


		CXmlNode* pNodeTables = new CXmlNode("Tables");
		nodeScene->AppendChild( pNodeTables );

		m_pScene->GetTextureMappingTable()->SaveNodeXML( pNodeTables );

		m_pScene->GetFontMappingTable()->SaveNodeXML( pNodeTables );

		CXmlNode* NodeObj = new CXmlNode("Objects");
		nodeScene->AppendChild(NodeObj);

		for( vector<int>::size_type i = 0; i < m_pScene->GetObjectCount(); ++i )
		{
			oag::OAGObject* obj = m_pScene->GetObjectAt(i);
			obj->SaveNodeXML(NodeObj);
		}

		writerDoc.WriteFile( fileSave.GetString(), nodeRoot);

		delete nodeRoot;
	}
	

#endif
}


void COAGMFCDoc::OnInsertTexture()
{
	CString filter;
	filter.LoadString( IDS_TEXTURE_FILTER );

	CFileDialog dlg(TRUE, "*.*", NULL, OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST, filter );

	if(dlg.DoModal() == IDOK)
	{
		CString strFileName = dlg.GetPathName().GetString();

		POSITION pos = GetFirstViewPosition();
		COAGMFCView* pView =  (COAGMFCView*) GetNextView(pos);

		if ( pView->m_pWinGraphicContext->MakeCurrent() )
		{
			oag::OAGTexture* pTexture = oag::OAGTextureLoader::LoadTextureFromDisk( strFileName.GetString() );

			if( pTexture )
			{
				pTexture->SetDefaultFilter();
				pTexture->BuildTexture();
				pTexture->SetTextureName("Image1");
				m_pScene->GetTextureMappingTable()->AddTexture( pTexture );
			}

			pView->m_pWinGraphicContext->DeleteCurrent();
		}
	}
}

void COAGMFCDoc::OnInsertFont()
{
	CString filter;
	filter.LoadString( IDS_FONT_FILTER );

	CFileDialog dlg(TRUE, "*.ttf", NULL, OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST, filter );

	if(dlg.DoModal() == IDOK)
	{
		CString strFileName = dlg.GetPathName().GetString();

		POSITION pos = GetFirstViewPosition();
		COAGMFCView* pView =  (COAGMFCView*) GetNextView(pos);

		if ( pView->m_pWinGraphicContext->MakeCurrent() )
		{
			oag::OAGFont* pFont = oag::OAGFontLoader::LoadFontFromDisk( strFileName.GetString(), OAG_FONT_MAP_2D );

			if( pFont )
			{
				pFont->SetFontSize(24);
				pFont->SetFontName("arial");
				m_pScene->GetFontMappingTable()->AddFont( pFont );
			}

			pView->m_pWinGraphicContext->DeleteCurrent();
		}
	}
}