#include "stdafx.h"
#include "drawfunc.h"

void drawarrowhead(CDC * pDC, int x, int y, int size, int xory)
{
	CPoint pt[3];
	if(xory){
		pt[0]=CPoint(-1,1);
		pt[1]=CPoint(-1,-1);
		pt[2]=CPoint(1,0);
	} else {
		pt[0]=CPoint(-1,1);
		pt[1]=CPoint(1,1);
		pt[2]=CPoint(0,-1);
	}
	int i;
	for(i=0; i<3; i++) {
		pt[i].x*=size;
		pt[i].y*=size;
		pt[i]+=CPoint(x,y);
	}
	pDC->Polygon(pt,3);
}

void drawxaxis(CDC * pDC, int xbegin, int xend, int y, int thick, COLORREF color)
{
	CPen pen1(PS_SOLID,1,color);
	CPen pen2(PS_SOLID,5,color);
	CPen * pOldPen=NULL;
	CBrush brush(color);
	CBrush * pOldBrush=NULL;
	pOldPen = pDC->SelectObject(&pen1);
	pOldBrush = pDC->SelectObject(&brush);
	drawarrowhead(pDC,xend+thick,y,2*thick,1);
	pDC->SelectObject(&pen2);
	pDC->MoveTo(xbegin, y);
	pDC->LineTo(xend, y);
	pDC->SelectObject(pOldPen);
	pDC->SelectObject(pOldBrush);
}

void drawyaxis(CDC * pDC, int ybegin, int yend, int x, int thick, COLORREF color)
{
	CPen pen1(PS_SOLID,1,color);
	CPen pen2(PS_SOLID,5,color);
	CPen * pOldPen=NULL;
	CBrush brush(color);
	CBrush * pOldBrush=NULL;
	pOldPen = pDC->SelectObject(&pen1);
	pOldBrush = pDC->SelectObject(&brush);
	drawarrowhead(pDC,x,ybegin-thick,2*thick,0);
	pDC->SelectObject(&pen2);
	pDC->MoveTo(x, ybegin);
	pDC->LineTo(x, yend);
	pDC->SelectObject(pOldPen);
	pDC->SelectObject(pOldBrush);
}

void drawxscale(CDC * pDC, int x, int y, CString & label)
{
	pDC->MoveTo(x,y);
	pDC->LineTo(x,y+5);
	pDC->SetTextAlign(TA_CENTER | TA_TOP);
	pDC->TextOut(x,y+5,label);
}

void drawyscale(CDC * pDC, int x, int y, CString & label)
{
	pDC->MoveTo(x,y);
	pDC->LineTo(x-5,y);
	pDC->SetTextAlign(TA_RIGHT | TA_BASELINE);
	pDC->TextOut(x-5,y+12,label);
}