MFC定义圆角矩形按钮

{
CFont *pFont = new CFont();
pFont->CreateFont(11, //以逻辑单位方式指定字体的高度
0, //以逻辑单位方式指定字体中字符的平均宽度
0, //指定偏离垂线和X轴在显示面上的夹角（单位：0.1度）
0, //指定字符串基线和X轴之间的夹角（单位：0.1度）
FW_NORMAL, //指定字体磅数
FALSE, //是不是斜体
FALSE, //加不加下划线
0, //指定是否是字体字符突出
ANSI_CHARSET, //指定字体的字符集
OUT_DEFAULT_PRECIS, //指定所需的输出精度
CLIP_DEFAULT_PRECIS, //指定所需的剪贴精度
DEFAULT_QUALITY, //指示字体的输出质量
DEFAULT_PITCH|FF_SWISS, //指定字体的间距和家族
_T("宋体") //指定字体的字样名称
);
m_btnIWantCheck.Init(RGB(255,255,255),
RGB(255,136,0),RGB(0,129,204),RGB(255,110,0),RGB(127,127,127));
m_btnIWantCheck.SetFont(pFont);
}

#pragma once

// CBtnNoImg
/*
测试环境：vs2010sp1
最后更新：2015-03-20 by kagula
*/

class CBtnNoImg : public CButton
{
DECLARE_DYNAMIC(CBtnNoImg)

public:
CBtnNoImg();
virtual ~CBtnNoImg();

protected:
DECLARE_MESSAGE_MAP()
public:
void Init(COLORREF clrFont, COLORREF clrBKFocus, COLORREF clrBKUnfocus,COLORREF clrBKSelected, COLORREF clrBKDisable);
void SetFont(CFont* pFont, BOOL bRedraw = TRUE);

virtual BOOL Create(LPCTSTR lpszCaption, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID);
virtual void DrawItem(LPDRAWITEMSTRUCT /*lpDrawItemStruct*/);
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
private:
int         m_nCtrlState;
CFont*      m_pFont;

COLORREF    m_clrFont;
COLORREF    m_clrBKFocus;
COLORREF    m_clrBKUnfocus;
COLORREF    m_clrBKSelected;
COLORREF    m_clrBKDisable;

bool        m_bTracking;

void        DrawRoundRect(CDC &dc, int radius, CRect rect, COLORREF clrBK);
public:
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
afx_msg void OnMouseHover(UINT nFlags, CPoint point);
afx_msg void OnMouseLeave();
afx_msg void OnMouseMove(UINT nFlags, CPoint point);
};

// BtnNoImg.cpp : implementation file
//

#include "stdafx.h"
#include "BtnNoImg.h"

#define CTRL_NOFOCUS  0x101
#define CTRL_FOCUS    0x102
#define CTRL_SELECTED 0x103
// CBtnNoImg

IMPLEMENT_DYNAMIC(CBtnNoImg, CButton)

CBtnNoImg::CBtnNoImg()
{
m_pFont = new CFont;
m_pFont->CreateFont(15, //以逻辑单位方式指定字体的高度
0, //以逻辑单位方式指定字体中字符的平均宽度
0, //指定偏离垂线和X轴在显示面上的夹角（单位：0.1度）
0, //指定字符串基线和X轴之间的夹角（单位：0.1度）
FW_NORMAL, //指定字体磅数
FALSE, //是不是斜体
FALSE, //加不加下划线
0, //指定是否是字体字符突出
ANSI_CHARSET, //指定字体的字符集
OUT_DEFAULT_PRECIS, //指定所需的输出精度
CLIP_DEFAULT_PRECIS, //指定所需的剪贴精度
DEFAULT_QUALITY, //指示字体的输出质量
DEFAULT_PITCH|FF_SWISS, //指定字体的间距和家族
_T("宋体") //指定字体的字样名称
);

m_clrFont = RGB(0, 0, 0);
m_bTracking = false;
}

CBtnNoImg::~CBtnNoImg()
{
if (m_pFont != NULL)
{
m_pFont->DeleteObject();

delete m_pFont;
m_pFont = NULL;
}
}

BEGIN_MESSAGE_MAP(CBtnNoImg, CButton)
ON_WM_ERASEBKGND()
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_WM_MOUSEHOVER()
ON_WM_MOUSELEAVE()
ON_WM_MOUSEMOVE()
END_MESSAGE_MAP()

// CBtnNoImg message handlers

BOOL CBtnNoImg::Create(LPCTSTR lpszCaption, DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID)
{
return CButton::Create(lpszCaption, dwStyle, rect, pParentWnd, nID);
}

void CBtnNoImg::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
CDC dc;
dc.Attach(lpDrawItemStruct->hDC);       //按钮控件DC

COLORREF clrBK = RGB(255,255,255);
switch(m_nCtrlState)
{
case CTRL_NOFOCUS:
clrBK = m_clrBKUnfocus;
break;
case CTRL_FOCUS:
clrBK = m_clrBKFocus;
break;
case CTRL_SELECTED:
clrBK = m_clrBKSelected;
break;
default:
break;
}

if (IsWindowEnabled()==FALSE)
{
clrBK = m_clrBKDisable;
}

//draw background
CRect rect(lpDrawItemStruct->rcItem);
//dc.FillSolidRect(&rect,clrBK);
DrawRoundRect(dc,5,rect,clrBK);

//draw text
CFont* pOldFont;
if (m_pFont)
{
pOldFont = dc.SelectObject(m_pFont);
}
COLORREF clrOld = dc.SetTextColor(m_clrFont);
CString strText;
GetWindowText(strText);
int oldMode = dc.SetBkMode(TRANSPARENT);
dc.DrawText(strText, -1, &lpDrawItemStruct->rcItem, DT_CENTER|DT_SINGLELINE|DT_VCENTER);
dc.SetBkMode(oldMode);
dc.SetTextColor(clrOld);
if (m_pFont)
{
dc.SelectObject(pOldFont);
}

dc.Detach();
}

BOOL CBtnNoImg::OnEraseBkgnd(CDC* pDC)
{
return TRUE;
//return CButton::OnEraseBkgnd(pDC);
}

void CBtnNoImg::Init(COLORREF clrFont,
COLORREF clrBKFocus,
COLORREF clrBKUnfocus,
COLORREF clrBKSelected,
COLORREF clrBKDisable)
{
SetButtonStyle(BS_OWNERDRAW);

m_clrFont = clrFont;

m_clrBKFocus = clrBKFocus;
m_clrBKUnfocus = clrBKUnfocus;
m_clrBKSelected = clrBKSelected;
m_clrBKDisable = clrBKDisable;

m_nCtrlState = CTRL_NOFOCUS;
}

void CBtnNoImg::OnLButtonDown(UINT nFlags, CPoint point)
{
if(m_nCtrlState == CTRL_FOCUS)
{
m_nCtrlState = CTRL_SELECTED;
Invalidate();
}

CButton::OnLButtonDown(nFlags, point);
}

void CBtnNoImg::OnLButtonUp(UINT nFlags, CPoint point)
{
if(m_nCtrlState == CTRL_SELECTED)
{
m_nCtrlState = CTRL_FOCUS;
Invalidate();
}

CButton::OnLButtonUp(nFlags, point);
}

void CBtnNoImg::OnMouseHover(UINT nFlags, CPoint point)
{
if (m_nCtrlState == CTRL_NOFOCUS)
{
m_nCtrlState = CTRL_FOCUS;
Invalidate();
}

m_bTracking = FALSE;

CButton::OnMouseHover(nFlags, point);
}

void CBtnNoImg::OnMouseLeave()
{
if(m_nCtrlState != CTRL_NOFOCUS)
{
m_nCtrlState = CTRL_NOFOCUS;
Invalidate();
}

m_bTracking = FALSE;

CButton::OnMouseLeave();
}

void CBtnNoImg::OnMouseMove(UINT nFlags, CPoint point)
{
if (!m_bTracking)
{
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(tme);
tme.hwndTrack = m_hWnd;
tme.dwFlags = TME_LEAVE|TME_HOVER;
tme.dwHoverTime = 1;
m_bTracking = _TrackMouseEvent(&tme)==TRUE?true:false;
}

CButton::OnMouseMove(nFlags, point);
}

void CBtnNoImg::DrawRoundRect( CDC &dc, int radius, CRect rect, COLORREF clrBK )
{
POINT pt;
pt.x =radius;
pt.y =radius;

int penSize = 1;
CPen pen;
pen.CreatePen(PS_SOLID,penSize,clrBK);
CPen* hOldPen = dc.SelectObject(&pen);
dc.RoundRect(&rect, pt);
dc.SelectObject(hOldPen);
rect.DeflateRect(CSize(penSize,penSize));//rect.DeflateRect(CSize(GetSystemMetrics(SM_CXEDGE), GetSystemMetrics(SM_CYEDGE)));
CBrush brush(clrBK);
dc.FillRect(rect,&brush );
brush.DeleteObject();
}

void CBtnNoImg::SetFont( CFont* pFont, BOOL bRedraw)
{
if (m_pFont)
{
delete m_pFont;
}
m_pFont = pFont;

if(bRedraw)
Invalidate();
}//end func