MFC自绘按钮类，显示点击，悬浮，初始状态

// PicButton.cpp : 实现文件 // #include "stdafx.h" #include "MFCApplication5.h" #include "PicButton.h" // CPicButton IMPLEMENT_DYNAMIC(CPicButton, CButton) CPicButton::CPicButton() { m_bOver/*（鼠标位于按钮之上）*/ = FALSE; m_bSelected/*（按钮被按下）*/ = FALSE; m_bTracking/*（在鼠标按下释放）*/ = FALSE; m_bFocus /*按钮为当前焦点*/ = FALSE; } CPicButton::~CPicButton() { } BEGIN_MESSAGE_MAP(CPicButton, CButton) ON_WM_MOUSEMOVE() ON_WM_MOUSELEAVE() ON_WM_MOUSEHOVER() END_MESSAGE_MAP() // CPicButton 消息处理程序 void CPicButton::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 if (!m_bTracking) { TRACKMOUSEEVENT tme; tme.cbSize = sizeof(tme); tme.hwndTrack = m_hWnd; tme.dwFlags = TME_LEAVE | TME_HOVER; tme.dwHoverTime = 100;//光标停在按钮上，改变状态的时间，以1毫秒为单位 m_bTracking = _TrackMouseEvent(&tme); } CButton::OnMouseMove(nFlags, point); } void CPicButton::OnMouseLeave() { // TODO: 在此添加消息处理程序代码和/或调用默认值 m_bOver = FALSE; // 鼠标没位于按钮之上 m_bTracking = FALSE; //鼠标离开按钮 InvalidateRect(NULL, FALSE); //让按钮重画 CButton::OnMouseLeave(); } void CPicButton::OnMouseHover(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_bOver = TRUE; //鼠标盘旋在按钮上空 InvalidateRect(NULL); //重画！ CButton::OnMouseHover(nFlags, point); } void CPicButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) { CRect rect = lpDrawItemStruct->rcItem; CDC *pDC = CDC::FromHandle(lpDrawItemStruct->hDC); int nSaveDC = pDC->SaveDC(); UINT state = lpDrawItemStruct->itemState; //根据按钮的状态贴图 //(以下贴按钮状态图，分以下几种情况来贴，，，和我们平常贴背景图片一样的做法) //鼠标停留按钮的状态 if (m_bOver) { //（以下按钮贴图，，可以用我们自己以前贴背景图的方法去做） CDC MemDC; MemDC.CreateCompatibleDC(pDC); CBitmap *pOldBmp; pOldBmp = MemDC.SelectObject(&m_OverBitmap);//加载停留状态 pDC->BitBlt(0, 0, rect.Width(), rect.Height(), &MemDC, 0, 0, SRCCOPY); } else { //初始状态 CDC MemDC; MemDC.CreateCompatibleDC(pDC); CBitmap *pOldBmp; pOldBmp = MemDC.SelectObject(&m_NormalBitmap);//加载最初状态 BITMAP bmp; m_NormalBitmap.GetObject(sizeof(bmp), &bmp); pDC->BitBlt(0, 0, rect.Width(), rect.Height(), &MemDC, 0, 0, SRCCOPY); } //按钮被按下(选中) if (state & ODS_SELECTED) { CDC MemDC; MemDC.CreateCompatibleDC(pDC); CBitmap *pOldBmp; pOldBmp = MemDC.SelectObject(&m_PressedBitmap); BITMAP bmp; //pOldBmp->GetBitmap(&bmp); m_PressedBitmap.GetObject(sizeof(bmp), &bmp); pDC->BitBlt(0, 0, rect.Width(), rect.Height(), &MemDC, 0, 0, SRCCOPY); } // TODO: 添加您的代码以绘制指定项 } void CPicButton::SetBitmapId(int nOver, int nNormal, int nPressed, int nFocus) { m_NormalBitmap.LoadBitmap(nNormal); m_PressedBitmap.LoadBitmap(nPressed); m_FocusBitmap.LoadBitmap(nFocus); m_OverBitmap.LoadBitmap(nOver); }