CHoverButton 类

 HoverButton.h

#if !defined(AFX_HOVERBUTTON_H__16C6D980_BD45_11D3_BDA3_00104B133581__INCLUDED_)#define AFX_HOVERBUTTON_H__16C6D980_BD45_11D3_BDA3_00104B133581__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000// HoverButton.h : header file///////////////////////////////////////////////////////////////////////////////// CHoverButton by Niek Albers// Thanks to some people for the tooltip.// A cool CBitmapButton derived class with 3 states,// Up/Down/Hover.class CHoverButton : public CBitmapButton{DECLARE_DYNAMIC(CHoverButton);// Constructionpublic:CHoverButton();void SetToolTipText(CString* spText, BOOL bActivate = TRUE);void SetToolTipText(int nId, BOOL bActivate = TRUE);// Attributesprotected:void ActivateTooltip(BOOL bActivate = TRUE);BOOL m_bHover;// indicates if mouse is over the buttonCSize m_ButtonSize;// width and height of the buttonCBitmap mybitmap;BOOL m_bTracking;// Overrides// ClassWizard generated virtual function overrides//{{AFX_VIRTUAL(CHoverButton)protected:virtual BOOL PreTranslateMessage(MSG* pMsg);virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);//}}AFX_VIRTUAL// Implementationpublic:BOOL LoadBitmap(CString bitmapid);virtual ~CHoverButton();// Generated message map functionsprotected:CToolTipCtrl m_ToolTip;void InitToolTip();//{{AFX_MSG(CHoverButton)afx_msg void OnMouseMove(UINT nFlags, CPoint point);afx_msg LRESULT OnMouseLeave(WPARAM wparam, LPARAM lparam);afx_msg void OnMouseHover(WPARAM wparam, LPARAM lparam) ;//}}AFX_MSGDECLARE_MESSAGE_MAP()};///////////////////////////////////////////////////////////////////////////////{{AFX_INSERT_LOCATION}}// Microsoft Visual C++ will insert additional declarations immediately before the previous line.#endif // !defined(AFX_HOVERBUTTON_H__16C6D980_BD45_11D3_BDA3_00104B133581__INCLUDED_)

 HoverButton.cpp

// HoverButton.cpp : implementation file//#include "stdafx.h"#include "HoverButton.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE[] = __FILE__;#endif/////////////////////////////////////////////////////////////////////////////// CHoverButtonCHoverButton::CHoverButton(){m_bHover = FALSE;m_bTracking = FALSE;}CHoverButton::~CHoverButton(){}IMPLEMENT_DYNAMIC(CHoverButton, CBitmapButton)BEGIN_MESSAGE_MAP(CHoverButton, CBitmapButton)//{{AFX_MSG_MAP(CHoverButton)ON_WM_MOUSEMOVE()ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)//}}AFX_MSG_MAPEND_MESSAGE_MAP()///////////////////////////////////////////////////////////////////////// //CHoverButton message handlersvoid CHoverButton::OnMouseMove(UINT nFlags, CPoint point) {//TODO: Add your message handler code here and/or call defaultif (!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);}CBitmapButton::OnMouseMove(nFlags, point);}BOOL CHoverButton::PreTranslateMessage(MSG* pMsg) {// TODO: Add your specialized code here and/or call the base classInitToolTip();m_ToolTip.RelayEvent(pMsg);return CButton::PreTranslateMessage(pMsg);}// Set the tooltip with a string resourcevoid CHoverButton::SetToolTipText(int nId, BOOL bActivate){CString sText;// load string resourcesText.LoadString(nId);// If string resource is not emptyif (sText.IsEmpty() == FALSE) SetToolTipText(&sText, bActivate);}// Set the tooltip with a CStringvoid CHoverButton::SetToolTipText(CString *spText, BOOL bActivate){// We cannot accept NULL pointerif (spText == NULL) return;// Initialize ToolTipInitToolTip();// If there is no tooltip defined then add itif (m_ToolTip.GetToolCount() == 0){CRect rectBtn; GetClientRect(rectBtn);m_ToolTip.AddTool(this, (LPCTSTR)*spText, rectBtn, 1);}// Set text for tooltipm_ToolTip.UpdateTipText((LPCTSTR)*spText, this, 1);m_ToolTip.Activate(bActivate);}void CHoverButton::InitToolTip(){if (m_ToolTip.m_hWnd == NULL){// Create ToolTip controlm_ToolTip.Create(this);// Create inactivem_ToolTip.Activate(FALSE);}} // End of InitToolTip// Activate the tooltipvoid CHoverButton::ActivateTooltip(BOOL bActivate){// If there is no tooltip then do nothingif (m_ToolTip.GetToolCount() == 0) return;// Activate tooltipm_ToolTip.Activate(bActivate);} // End of EnableTooltipvoid CHoverButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) {// TODO: Add your code to draw the specified itemCDC *mydc=CDC::FromHandle(lpDrawItemStruct->hDC);CDC * pMemDC = new CDC;pMemDC -> CreateCompatibleDC(mydc);CBitmap * pOldBitmap;pOldBitmap = pMemDC -> SelectObject(&mybitmap);CPoint point(0,0);if(lpDrawItemStruct->itemState & ODS_SELECTED){mydc->BitBlt(0,0,m_ButtonSize.cx,m_ButtonSize.cy,pMemDC,m_ButtonSize.cx,0,SRCCOPY);}else{if(m_bHover){mydc->BitBlt(0,0,m_ButtonSize.cx,m_ButtonSize.cy,pMemDC,m_ButtonSize.cx*2,0,SRCCOPY);}else{mydc->BitBlt(0,0,m_ButtonSize.cx,m_ButtonSize.cy,pMemDC,0,0,SRCCOPY);}}// clean uppMemDC -> SelectObject(pOldBitmap);delete pMemDC;}// Load a bitmap from the resources in the button, the bitmap has to have 3 buttonsstates next to each other: Up/Down/HoverBOOL CHoverButton::LoadBitmap(CString bitmapid){mybitmap.Attach(::LoadImage(::AfxGetInstanceHandle(),bitmapid, IMAGE_BITMAP,0,0,LR_LOADFROMFILE));BITMAPbitmapbits;mybitmap.GetBitmap(&bitmapbits);m_ButtonSize.cy=bitmapbits.bmHeight;m_ButtonSize.cx=bitmapbits.bmWidth/3;SetWindowPos( NULL, 0,0, m_ButtonSize.cx,m_ButtonSize.cy,SWP_NOMOVE |SWP_NOOWNERZORDER );return TRUE;}void CHoverButton::OnMouseHover(WPARAM wparam, LPARAM lparam) {// TODO: Add your message handler code here and/or call defaultm_bHover=TRUE;Invalidate();}LRESULT CHoverButton::OnMouseLeave(WPARAM wparam, LPARAM lparam){m_bTracking = FALSE;m_bHover=FALSE;Invalidate();return 0;}