99 lines
2.6 KiB
C++
Executable File
99 lines
2.6 KiB
C++
Executable File
// ElevationButton.cpp : implementation file
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//
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#include <math.h>
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#include "stdafx.h"
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#include "ScEd.h"
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#include "ElevationButton.h"
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#include "MathUtil.h"
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/////////////////////////////////////////////////////////////////////////////
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// CElevationButton
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CElevationButton::CElevationButton() : m_Elevation(45)
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{
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}
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CElevationButton::~CElevationButton()
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{
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}
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BEGIN_MESSAGE_MAP(CElevationButton, CButton)
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//{{AFX_MSG_MAP(CElevationButton)
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// NOTE - the ClassWizard will add and remove mapping macros here.
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//}}AFX_MSG_MAP
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END_MESSAGE_MAP()
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/////////////////////////////////////////////////////////////////////////////
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// CElevationButton message handlers
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void CElevationButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
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{
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CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
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CRect rect = lpDrawItemStruct->rcItem;
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// draw button edges
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pDC->DrawFrameControl(rect, DFC_BUTTON,DFCS_BUTTONPUSH | DFCS_FLAT );
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// deflate the drawing rect by the size of the button's edges
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rect.DeflateRect( CSize(GetSystemMetrics(SM_CXEDGE), GetSystemMetrics(SM_CYEDGE)));
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// fill the interior color
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pDC->FillSolidRect(rect,RGB(0,0,0));
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// shrink rect before drawing anything else
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rect.DeflateRect(15,5);
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// create a hollow brush
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CBrush brush;
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brush.CreateStockObject(HOLLOW_BRUSH);
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CBrush* oldbrush=pDC->SelectObject(&brush);
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// draw horizon
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pDC->SetROP2(R2_WHITE);
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pDC->MoveTo(rect.left,rect.bottom);
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pDC->LineTo(rect.right,rect.bottom);
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// draw direction arrow
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pDC->SetROP2(R2_COPYPEN);
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CPen pen;
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pen.CreatePen(PS_SOLID,1,RGB(255,0,0));
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CPen* oldpen=pDC->SelectObject(&pen);
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float dy=float(rect.bottom-rect.top)/2.0f;
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float dx=float(rect.right-rect.left)/2.0f;
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float r=(float) sqrt(2*dx*dx);
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float cx=float(rect.left+rect.right)/2.0f;
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float cy=float(rect.bottom);
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float dirx=cos(DEGTORAD(m_Elevation));
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float diry=-sin(DEGTORAD(m_Elevation));
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CPoint m_One(int(cx+dirx*r),int(cy+diry*r));
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CPoint m_Two(int(cx+dirx*(r-14)),int(cy+diry*(r-14)));
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double slopy , cosy , siny;
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double Par = 6.5; //length of Arrow (>)
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slopy = atan2( float( m_One.y - m_Two.y ),float( m_One.x - m_Two.x ) );
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cosy = cos( slopy );
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siny = sin( slopy ); //need math.h for these functions
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//draw a line between the 2 endpoint
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pDC->MoveTo( m_One );
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pDC->LineTo( m_Two );
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pDC->MoveTo( m_Two );
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pDC->LineTo( m_Two.x + int( Par * cosy - ( Par / 2.0 * siny ) ),
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m_Two.y + int( Par * siny + ( Par / 2.0 * cosy ) ) );
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pDC->LineTo( m_Two.x + int( Par * cosy + Par / 2.0 * siny ),
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m_Two.y - int( Par / 2.0 * cosy - Par * siny ) );
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pDC->LineTo( m_Two );
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pDC->SelectObject(oldpen);
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pDC->SelectObject(oldbrush);
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}
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