SEM6 CG: Midpt circle

// midptcircleView.cpp : implementation of the CmidptcircleView class
//

#include "stdafx.h"
// SHARED_HANDLERS can be defined in an ATL project implementing preview, thumbnail
// and search filter handlers and allows sharing of document code with that project.
#ifndef SHARED_HANDLERS
#include "midptcircle.h"
#endif

#include "midptcircleDoc.h"
#include "midptcircleView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CmidptcircleView

IMPLEMENT_DYNCREATE(CmidptcircleView, CView)

BEGIN_MESSAGE_MAP(CmidptcircleView, CView)
    ON_WM_CONTEXTMENU()
    ON_WM_RBUTTONUP()
END_MESSAGE_MAP()

// CmidptcircleView construction/destruction

CmidptcircleView::CmidptcircleView()
{
    // TODO: add construction code here

}

CmidptcircleView::~CmidptcircleView()
{
}

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

    return CView::PreCreateWindow(cs);
}

// CmidptcircleView drawing
void plot(CDC* PDC,int xc,int yc,int x,int y, COLORREF color)
{
    PDC->SetPixel(xc+x,yc+y,color);
    PDC->SetPixel(xc+x,yc-y,color);
    PDC->SetPixel(xc-x,yc+y,color);
    PDC->SetPixel(xc-x,yc-y,color);

    PDC->SetPixel(xc+y,yc+x,color);
    PDC->SetPixel(xc-y,yc+x,color);
    PDC->SetPixel(xc+y,yc-x,color);
    PDC->SetPixel(xc-y,yc-x,color);

}


void drawcircle(CDC* pDC,int xc, int yc, int r, COLORREF color)
{

    /*

    Set X = 0 and Y = R
2. Set P = 1 – R
3. Repeat While (X < Y)
4. Call Draw Circle(Xc, Yc, X, Y)
5. Set X = X + 1
6. If (P < 0) Then
7. P = P + 2X + 1
8. Else
9. Set Y = Y – 1
10. P = P + 2(X – Y) + 1
[End of If]
11. Call Draw Circle(Xc, Yc, X, Y)
[End of While]
12. Exit
    */


    int x=0,y=r;
    int p=1-r;
    while(x<y)
    {
        plot(pDC,xc,yc,x,y,color);
        x++;
        if(p<0)
        {
            p+=2*x+1;
        }
        else
        {
            y--;
            p+=2*(x-y)+1;
        }
        plot(pDC,xc,yc,x,y,color);
    }



}



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

    //Draws the audi logo

    drawcircle(pDC,100,100,50,RGB(128,128,128));
    drawcircle(pDC,100,100,48,RGB(128,128,128));
    drawcircle(pDC,100,100,46,RGB(128,128,128));
    drawcircle(pDC,100,100,52,RGB(128,128,128));
    drawcircle(pDC,100,100,54,RGB(128,128,128));
    drawcircle(pDC,100,100,56,RGB(128,128,128));



    drawcircle(pDC,156+20,100,50,RGB(128,128,128));
    drawcircle(pDC,156+20,100,48,RGB(128,128,128));
    drawcircle(pDC,156+20,100,46,RGB(128,128,128));
    drawcircle(pDC,156+20,100,52,RGB(128,128,128));
    drawcircle(pDC,156+20,100,54,RGB(128,128,128));
    drawcircle(pDC,156+20,100,56,RGB(128,128,128));

    drawcircle(pDC,212+40,100,50,RGB(128,128,128));
    drawcircle(pDC,212+40,100,48,RGB(128,128,128));
    drawcircle(pDC,212+40,100,46,RGB(128,128,128));
    drawcircle(pDC,212+40,100,52,RGB(128,128,128));
    drawcircle(pDC,212+40,100,54,RGB(128,128,128));
    drawcircle(pDC,212+40,100,56,RGB(128,128,128));

    drawcircle(pDC,268+60,100,50,RGB(128,128,128));
    drawcircle(pDC,268+60,100,48,RGB(128,128,128));
    drawcircle(pDC,268+60,100,46,RGB(128,128,128));
    drawcircle(pDC,268+60,100,52,RGB(128,128,128));
    drawcircle(pDC,268+60,100,54,RGB(128,128,128));
    drawcircle(pDC,268+60,100,56,RGB(128,128,128));

    // TODO: add draw code for native data here
}

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

void CmidptcircleView::OnContextMenu(CWnd* /* pWnd */, CPoint point)
{
#ifndef SHARED_HANDLERS
    theApp.GetContextMenuManager()->ShowPopupMenu(IDR_POPUP_EDIT, point.x, point.y, this, TRUE);
#endif
}


// CmidptcircleView diagnostics

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

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

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