OAG Library (OpenGL) Part 2.1 - Drawing Objects 2D using the Mouse and Programatically

// OAGMFCView.cpp : implementation of the COAGMFCView class
//

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

#include "OAGMFCDoc.h"
#include "OAGMFCView.h"

#include "CadTools\\Tool.h"
#include "CadTools\\LineTool.h"
#include "CadTools\\PolyLineTool.h"
#include "CadTools\\RectangleTool.h"
#include "CadTools\\TriangleTool.h"
#include "CadTools\\RasterImageTool.h"
#include "CadTools\\Text2DTool.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// COAGMFCView

IMPLEMENT_DYNCREATE(COAGMFCView, CView)

BEGIN_MESSAGE_MAP(COAGMFCView, CView)
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, &CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, &CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, &COAGMFCView::OnFilePrintPreview)
	ON_WM_ERASEBKGND()
	ON_WM_SIZE()
	ON_COMMAND(ID_DRAW_LINE, &COAGMFCView::OnDrawLine)
	ON_COMMAND(ID_DRAW_POLYLINE, &COAGMFCView::OnDrawPolyline)
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_WM_KEYDOWN()
	ON_COMMAND(ID_DRAW_RECTANGLE, &COAGMFCView::OnDrawRectangle)
	ON_COMMAND(ID_DRAW_TRIANGLE, &COAGMFCView::OnDrawTriangle)
	ON_COMMAND(ID_INSERT_RASTERIMAGE, &COAGMFCView::OnInsertRasterimage)
	ON_COMMAND(ID_DRAW_2DTEXT, &COAGMFCView::OnDraw2dtext)
END_MESSAGE_MAP()

// COAGMFCView construction/destruction

COAGMFCView::COAGMFCView()
:m_pRender(NULL)
,m_pWinGraphicContext(NULL)
,m_pTool(NULL)
{
	
}

COAGMFCView::~COAGMFCView()
{
	if( m_pRender )
		delete m_pRender;

	if( m_pWinGraphicContext )
		delete m_pWinGraphicContext;

	if ( m_pTool )
		delete m_pTool;
}

BOOL COAGMFCView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

// COAGMFCView drawing

void COAGMFCView::OnDraw(CDC* pDC)
{
	COAGMFCDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	if (!pDoc)
		return;

	if( m_pRender )
	{
		m_pRender->SetScene( pDoc->m_pScene );
		m_pRender->RenderScene();
	}
}


// COAGMFCView printing


void COAGMFCView::OnFilePrintPreview()
{
	AFXPrintPreview(this);
}

BOOL COAGMFCView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void COAGMFCView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void COAGMFCView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

void COAGMFCView::OnRButtonUp(UINT nFlags, CPoint point)
{
	ClientToScreen(&point);
	OnContextMenu(this, point);
}

void COAGMFCView::OnContextMenu(CWnd* pWnd, CPoint point)
{
	theApp.GetContextMenuManager()->ShowPopupMenu(IDR_POPUP_EDIT, point.x, point.y, this, TRUE);
}


// COAGMFCView diagnostics

#ifdef _DEBUG
void COAGMFCView::AssertValid() const
{
	CView::AssertValid();
}

void COAGMFCView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

COAGMFCDoc* COAGMFCView::GetDocument() const // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(COAGMFCDoc)));
	return (COAGMFCDoc*)m_pDocument;
}
#endif //_DEBUG


// COAGMFCView message handlers

void COAGMFCView::OnInitialUpdate()
{
	CView::OnInitialUpdate();

	m_pWinGraphicContext = new oag::WinGraphicContext(this);
	m_pRender = new oag::WinRenderer(m_pWinGraphicContext, false);
	m_pRender->SetBackGroundColor(0, 0, 0);
}

BOOL COAGMFCView::OnEraseBkgnd(CDC* pDC)
{
	// TODO: Add your message handler code here and/or call default
	return FALSE;
}

void COAGMFCView::OnSize(UINT nType, int cx, int cy)
{
	CView::OnSize(nType, cx, cy);

	if ( m_pWinGraphicContext )
		m_pWinGraphicContext->OnSize(cx, cy);
}

void COAGMFCView::CreateObjects()
{
	//Creating a lines
	oag::OAGPrimitives* pLine = new oag::OAGPrimitives();
	pLine->SetGeometryType(GL_LINES);
	GetDocument()->m_pScene->AddObject( pLine );

	pLine->SetArraySize( 4 );
	pLine->AddVertex(450, 100, 0 );
	pLine->AddVertex(450, 200, 0 );
	pLine->AddVertex(400, 150, 0 );
	pLine->AddVertex(500, 150, 0 );
	
	//Creating a rectangle
	oag::OAGPrimitives* pQuad = new oag::OAGPrimitives();
	pQuad->SetGeometryType(GL_QUADS);
	GetDocument()->m_pScene->AddObject( pQuad );

	pQuad->SetArraySize( 4 );
	pQuad->AddVertex( 100, 100, 0);
	pQuad->AddVertex( 100, 200, 0);
	pQuad->AddVertex( 200, 200, 0);
	pQuad->AddVertex( 200, 100, 0);
}

void COAGMFCView::OnLButtonDown(UINT nFlags, CPoint point)
{
	oag::OAGVector3d center;

	oag::OAGVector3f pt(point.x, point.y, 0);

	m_pRender->ScreenToWorld(&pt, &center, 1);

	if( m_pTool && !m_pTool->IsFinished() )
	{
		oag::OAGVector3f vec( (float)center.m_X, (float)center.m_Y, 0.f );
		m_pTool->OnMouseClick( vec );
		Invalidate(FALSE);		
	}

	CView::OnLButtonDown(nFlags, point);
}

void COAGMFCView::OnMouseMove(UINT nFlags, CPoint point)
{
	if( m_pTool && m_pTool->IsStarted() && !m_pTool->IsFinished() )
	{
		oag::OAGVector3d center;

		oag::OAGVector3f pt(point.x, point.y, 0);
		oag::OAGVector3f vec;

		m_pRender->ScreenToWorld(&pt, &center, 1);
		oag::OAGVector3f vecPoint( (float)center.m_X, (float)center.m_Y, 0.f );
		vec.m_X = vecPoint.m_X; vec.m_Y = vecPoint.m_Y;

		m_pTool->OnMouseMove( vec );

		Invalidate(FALSE);
	}

	CView::OnMouseMove(nFlags, point);
}

void COAGMFCView::OnLButtonUp(UINT nFlags, CPoint point)
{
	if ( m_pTool && m_pTool->IsFinished() )
		Invalidate(FALSE);

	ReleaseCapture();

	CView::OnLButtonUp(nFlags, point);
}

void COAGMFCView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
	if( nChar == 27 || GetKeyState(VK_ESCAPE) & 0x80 )
	{
		if( m_pTool )
		{
			m_pTool->OnFinalize();
			delete m_pTool;
			m_pTool = NULL;
		}
	}

	Invalidate(FALSE);

	CView::OnKeyDown(nChar, nRepCnt, nFlags);
}

void COAGMFCView::OnInsertGeometries( UINT nID )
{
	GetDocument()->CreateNewGeometry2D( nID );
}

void COAGMFCView::OnDrawLine()
{
	if ( m_pTool )
		delete m_pTool;
	
	OnInsertGeometries(1);

	m_pTool = new CLineTool();
	m_pTool->SetScene( GetDocument()->m_pScene );
}

void COAGMFCView::OnDrawPolyline()
{
	if ( m_pTool )
		delete m_pTool;

	OnInsertGeometries(2);

	m_pTool = new CPolylineTool();
	m_pTool->SetScene( GetDocument()->m_pScene );
}



void COAGMFCView::OnDrawRectangle()
{
	if ( m_pTool )
		delete m_pTool;

	OnInsertGeometries(3);

	m_pTool = new CRectangleTool();
	m_pTool->SetScene( GetDocument()->m_pScene );
	
}

void COAGMFCView::OnDrawTriangle()
{
	if ( m_pTool )
		delete m_pTool;

	OnInsertGeometries(4);

	m_pTool = new CTriangleTool();
	m_pTool->SetScene( GetDocument()->m_pScene );	
}

void COAGMFCView::OnInsertRasterimage()
{
	if ( m_pTool )
		delete m_pTool;

	m_pTool = new CRasterImageTool();
	m_pTool->SetScene( GetDocument()->m_pScene );
	m_pTool->SetWinGraphicContext( m_pWinGraphicContext );
}

void COAGMFCView::OnDraw2dtext()
{
	if ( m_pTool )
		delete m_pTool;

	m_pTool = new CText2DTool();
	m_pTool->SetScene( GetDocument()->m_pScene );
	m_pTool->SetWinGraphicContext( m_pWinGraphicContext );
}