spinnerbutton.cpp

通过VC源代码

// SpinnerButton.cpp : implementation file
//

#include "stdafx.h"
#include "Simulator.h"
#include "SpinnerButton.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

CBrush CSpinnerButton::green(RGB(0, 128, 0));
CBrush CSpinnerButton::red(RGB(255, 0, 0));

/////////////////////////////////////////////////////////////////////////////
// CSpinnerButton

CSpinnerButton::CSpinnerButton()
{
 pos = 0;
 mode = TRUE;  // "Green" mode
}

CSpinnerButton::~CSpinnerButton()
{
}


BEGIN_MESSAGE_MAP(CSpinnerButton, CButton)
	//{{AFX_MSG_MAP(CSpinnerButton)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSpinnerButton message handlers

void CSpinnerButton::DrawItem(LPDRAWITEMSTRUCT dis) 
{
 CPoint a;
 CPoint b;
 CRect  r;
 CRect client;
 CPoint p1;
 CPoint p2;
 int width = ::GetSystemMetrics(SM_CXBORDER) * 4;

 GetClientRect(&client);
 r = client;
 r.InflateRect(-1, -1);
 CDC * dc = CDC::FromHandle(dis->hDC);

 switch(pos)
    { /* pos */
     case 0: //   a    
	     //  /|\
	     //p1 | p2
	     //   |   
	     //   b 
	     a.x = r.Width() / 2;
	     a.y = r.top;

	     b.x = a.x;
	     b.y = r.bottom;

	     p1.x = a.x - width;
	     p1.y = a.y + width;
	     p2.x = a.x + width + 1;
	     p2.y = a.y + width + 1;
	     break;
     case 1: // p1_ a
	     //    /|
	     //   / p2
	     //  /
	     // b
	     a.x = r.right;
	     a.y = r.top;

	     b.x = r.left;
	     b.y = r.bottom;

	     p1.x = a.x - width;
	     p1.y = a.y;
	     p2.x = a.x;
	     p2.y = a.y + width + 1;
	     break;
     case 2: //      p1
	     //  b ___\ a
	     //       /
	     //      p2

	     a.x = r.right;
	     a.y = r.Height() / 2;

	     b.x = r.left;
	     b.y = a.y;

	     p1.x = a.x - width;
	     p1.y = a.y - width;
	     p2.x = p1.x - 1;
	     p2.y = a.y + width + 1;
	     break;
     case 3: //   b
	     //    \
	     //     \ p1
	     //   p2_\|
	     //       a
	     a.x = r.right;
	     a.y = r.bottom;

	     b.x = r.left;
	     b.y = r.top;

	     p1.x = a.x;
	     p1.y = a.y - width;
	     p2.x = a.x - width - 1;
	     p2.y = a.y;
	     break;
     case 4: //     b
	     //     |
	     //   p1| p2
	     //    \|/
	     //     a
	     a.x = r.Width() / 2;
	     a.y = r.bottom;
	     b.x = a.x;
	     b.y = r.top;

	     p1.x = a.x - width;
	     p1.y = a.y - width;
	     p2.x = a.x + width + 1;
	     p2.y = p1.y - 1;
	     break;
     case 5: //        b
	     //       /
	     //   p1 /
	     //    |/_ p2
	     //    a
	     a.x = r.left;
	     a.y = r.bottom;
	     b.x = r.right;
	     b.y = r.top;
	     p1.x = a.x;
	     p1.y = a.y - width;
	     p2.x = a.x + width + 1;
	     p2.y = a.y;
	     break;
     case 6: //     p1
	     //   a/___ b
	     //    \
	     //     p2
	     a.x = r.left;
	     a.y = r.Height() / 2;
	     b.x = r.right;
	     b.y = a.y;
	     p1.x = a.x + width;
	     p1.y = a.y - width;
	     p2.x = p1.x + 1;
	     p2.y = a.y + width + 1;
	     break;
     case 7: //
	     // a _ p2
	     //  |\
	     // p1 \
	     //     \
	     //      b
	     a.x = r.left;
	     a.y = r.top;
	     b.x = r.right;
	     b.y = r.bottom;
	     p1.x = a.x;
	     p1.y = a.y + width;
	     p2.x = a.x + width + 1;
	     p2.y = a.y;
	     break;
    } /* pos */
	
 dc->FillRect(&client, mode ? &green : &red);
 dc->SelectStockObject(WHITE_PEN);
 dc->MoveTo(a);
 dc->LineTo(b);
 dc->MoveTo(p1);
 dc->LineTo(a);
 dc->LineTo(p2);
}