MFC基本控件3-Button的风格

#pragma once
// CMyButton
class CMyButton : public CButton
{
  DECLARE_DYNAMIC(CMyButton)
public:
  CMyButton();
  virtual ~CMyButton();
  CFont m_fontMouseMove;  //鼠标移动到按钮上时用的字体
  HCURSOR m_hCurSorMouseMove; //鼠标移动到按钮上时用的光标
  BOOL  m_isLButtonDown;  //鼠标左键是否按下
  BOOL  m_isMouseInButton;  //鼠标是否在按钮上面
protected:
  DECLARE_MESSAGE_MAP()
public:
  virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);//绘制控件消息
  afx_msg void OnLButtonDown(UINT nFlags, CPoint point);//左键按下消息
  afx_msg void OnLButtonUp(UINT nFlags, CPoint point);//左键抬起消息
  afx_msg void OnMouseMove(UINT nFlags, CPoint point);//鼠标移动
  afx_msg void OnTimer(UINT_PTR nIDEvent);//计时器
  afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);//设置光标
};

// CMyButton.cpp: 实现文件
//
#include "pch.h"
#include "class08.h"
#include "CMyButton.h"
// CMyButton
IMPLEMENT_DYNAMIC(CMyButton, CButton)
CMyButton::CMyButton()
{
}
CMyButton::~CMyButton()
{
}
BEGIN_MESSAGE_MAP(CMyButton, CButton)
  ON_WM_LBUTTONDOWN()
  ON_WM_LBUTTONUP()
  ON_WM_MOUSEMOVE()
  ON_WM_TIMER()
  ON_WM_SETCURSOR()
END_MESSAGE_MAP()
// CMyButton 消息处理程序
void CMyButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
  //整个按钮的外观都是在这里进行绘制
  CDC* pDc = CDC::FromHandle(lpDrawItemStruct->hDC);//获取dc
  CRect rect(lpDrawItemStruct->rcItem);//按钮的rect结构
  pDc->SetBkMode(TRANSPARENT);
  UINT buttonState = lpDrawItemStruct->itemState;//获取按钮状态
  CFont* pOldFont = NULL;
  CString strText;
  GetWindowText(strText);
  if (m_isMouseInButton)
  {
    if (buttonState & ODS_SELECTED)//判断有没有点击按钮
    {
      pDc->Draw3dRect(rect,//指定范围内的矩形
        GetSysColor(COLOR_3DSHADOW),//三维矩形的顶部和左侧的颜色
        GetSysColor(COLOR_3DHILIGHT)//三维矩形的底部和右侧的颜色
      );
    }
    else
      pDc->Draw3dRect(rect, GetSysColor(COLOR_3DHILIGHT), GetSysColor(COLOR_3DSHADOW));
    pDc->SetTextColor(RGB(255, 0, 0));
    if (m_fontMouseMove.GetSafeHandle() == NULL)
    {
      CFont* font = GetFont();
      LOGFONT lf;
      font->GetLogFont(&lf);
      lf.lfUnderline = true;
      m_fontMouseMove.CreateFontIndirect(&lf);
    }
    pOldFont = pDc->SelectObject(&m_fontMouseMove);
  }
  else
  {
    pDc->SetTextColor(RGB(0, 0, 0));
  }
  pDc->DrawText(strText, rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
  if (pOldFont)
    pDc->SelectObject(pOldFont);
  // TODO:  添加您的代码以绘制指定项
}
void CMyButton::OnLButtonDown(UINT nFlags, CPoint point)
{
  // TODO: 在此添加消息处理程序代码和/或调用默认值
  m_isLButtonDown = true;
  CButton::OnLButtonDown(nFlags, point);
}
void CMyButton::OnLButtonUp(UINT nFlags, CPoint point)
{
  // TODO: 在此添加消息处理程序代码和/或调用默认值
  m_isLButtonDown = false;
  if (m_isMouseInButton)
  {
    m_isMouseInButton = false;
    InvalidateRect(NULL);//整个按钮的区域无效
  }
  CButton::OnLButtonUp(nFlags, point);
}
void CMyButton::OnMouseMove(UINT nFlags, CPoint point)
{
  // TODO: 在此添加消息处理程序代码和/或调用默认值
  SetTimer(1, 10, NULL);
  CButton::OnMouseMove(nFlags, point);
}
void CMyButton::OnTimer(UINT_PTR nIDEvent)
{
  // TODO: 在此添加消息处理程序代码和/或调用默认值
  static BOOL bPainted = false; //防止重绘用的
  POINT pt;
  GetCursorPos(&pt);//获取鼠标关于屏幕的位置
  CRect rect;
  GetWindowRect(&rect);//获得CWnd的屏幕坐标
  if (m_isLButtonDown)
  {
    KillTimer(1);
    return;
  }
  if (!rect.PtInRect(pt))//判断光标的坐标在不在按钮的矩形区域内
  {
    m_isMouseInButton = false;
    KillTimer(1);
    if (bPainted)
      InvalidateRect(NULL);
    bPainted = false;
    return;
  }
  else
  {
    m_isMouseInButton = true;
    if (!bPainted)
    {
      bPainted = true;
      InvalidateRect(NULL);
    }
  }
  CButton::OnTimer(nIDEvent);
}
BOOL CMyButton::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
  // TODO: 在此添加消息处理程序代码和/或调用默认值
  if (m_isMouseInButton)
  {
    ::SetCursor(::LoadCursorFromFile(_T("res\\CURSOR1.CUR")));
  }
  //return CButton::OnSetCursor(pWnd, nHitTest, message);//需要注释掉
  return true;
}