cbutton.cpp

实现一个银行营业厅排队程序

// CButton.cpp : implementation file
//

#include "stdafx.h"
#include "Bank.h"
#include "CButton.h"

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

/////////////////////////////////////////////////////////////////////////////
// CCButton

CCButton::CCButton()
{
}

CCButton::~CCButton()
{
}


BEGIN_MESSAGE_MAP(CCButton, CButton)
	//{{AFX_MSG_MAP(CCButton)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCButton message handlers

void CCButton::Draw(CDC *pDC, const CRect &rect, UINT state)
{
	CString text; 
	GetWindowText(text);
    int l=text.GetLength();
    CRect rectClient=rect;

    //获得控件的字体
    CFont* pFont=GetFont();

    //确定所选字体有效高度和宽度
    LOGFONT logfont;
    pFont->GetObject(sizeof(LOGFONT),&logfont);
    if(logfont.lfHeight==0)logfont.lfHeight=20;
    logfont.lfWidth=0;//宽度设为0，宽度值由高度确定
    logfont.lfWeight=1000;
    logfont.lfEscapement=logfont.lfOrientation=0;
    CFont tryfont; 
	VERIFY(tryfont.CreateFontIndirect(&logfont));
    CFont* pFontOld=pDC->SelectObject(&tryfont);

    //根据控件大小，调整字体的高度，使文本与控件协调
    CSize textSizeClient=pDC->GetTextExtent(text,l);
    if(rectClient.Width()*textSizeClient.cy>rectClient.Height()*textSizeClient.cx){
        logfont.lfHeight=::MulDiv(logfont.lfHeight,rectClient.Height(),textSizeClient.cy);
     } 
    else{
        logfont.lfHeight = ::MulDiv(logfont.lfHeight,rectClient.Width(),textSizeClient.cx);
    }

    //创建并选择协调后的字体
    CFont font; font.CreateFontIndirect(&logfont);
    pDC->SelectObject(&font);
    textSizeClient=pDC->GetTextExtent(text,l);
    //确定文本与控件边界的距离minx,miny
    int minx=rectClient.left+(rectClient.Width()-textSizeClient.cx)/2;
    int miny=rectClient.top+(rectClient.Height()-textSizeClient.cy)/2;
    int oldBkMode=pDC->SetBkMode(TRANSPARENT);
    //COLORREF textcol=::GetSysColor(COLOR_BTNTEXT);
    COLORREF textcol=RGB(255,100,10);
   //RGB(0,255,0)
    COLORREF oldTextColor=pDC->SetTextColor(textcol);
    int cx = minx;
    int cy = miny;
    int s=(state&ODS_SELECTED)?-1:+1;
    cx+= 3; 
	cy+= 3;

    //实现3D效果
    pDC->SetTextColor(::GetSysColor(COLOR_3DDKSHADOW));
    pDC->TextOut(cx-s*2,cy+s*2,text);
    pDC->TextOut(cx+s*2,cy-s*2,text);
    pDC->TextOut(cx+s*2,cy+s*2,text);
    pDC->SetTextColor(::GetSysColor(COLOR_3DHILIGHT));
    pDC->TextOut(cx+s*1,cy-s*2,text);
    pDC->TextOut(cx-s*2,cy+s*1,text);
    pDC->TextOut(cx-s*2,cy-s*2,text);
    pDC->SetTextColor(::GetSysColor(COLOR_3DSHADOW));
    pDC->TextOut(cx-s*1,cy+s*1,text);
    pDC->TextOut(cx+s*1,cy-s*1,text);
    pDC->TextOut(cx+s*1,cy+s*1,text);
    pDC->SetTextColor(::GetSysColor(COLOR_3DLIGHT));
    pDC->TextOut(cx,cy-s*1,text);
    pDC->TextOut(cx-s*1,cy,text);
    pDC->TextOut(cx-s*1,cy-s*1,text);
    pDC->SetTextColor(textcol);

   //输出标题
    pDC->TextOut(cx,cy,text);

    //恢复设备描述表
    pDC->SetTextColor(oldTextColor);
    pDC->SetBkMode(oldBkMode);
    pDC->SelectObject(pFontOld);
}

void CCButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
    CDC* pDC=CDC::FromHandle(lpDrawItemStruct->hDC);
    ASSERT_VALID(pDC);
    CRect rectClient=lpDrawItemStruct->rcItem;
    Draw(pDC,rectClient,lpDrawItemStruct->itemState);
	
}