myhotkeyview.cpp

本文件中包含的是《VC编程100例》一书中的源代码

// MyHotKeyView.cpp : implementation of the CMyHotKeyView class
//

#include "stdafx.h"
#include "MyHotKey.h"

#include "MyHotKeyDoc.h"
#include "MyHotKeyView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMyHotKeyView

IMPLEMENT_DYNCREATE(CMyHotKeyView, CView)

BEGIN_MESSAGE_MAP(CMyHotKeyView, CView)
	//{{AFX_MSG_MAP(CMyHotKeyView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
		ON_MESSAGE(WM_HOTKEY,OnHotKey)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyHotKeyView construction/destruction

CMyHotKeyView::CMyHotKeyView()
{
	// TODO: add construction code here

}

CMyHotKeyView::~CMyHotKeyView()
{
	//释放全局原子
	GlobalDeleteAtom(m_atomId);
}

BOOL CMyHotKeyView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyHotKeyView drawing

void CMyHotKeyView::OnDraw(CDC* pDC)
{
	CMyHotKeyDoc *pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	//在用户工作区显示提示信息
	//m_bRegister标识热键注册成功与否
	if(m_bRegister == FALSE)
		pDC->TextOut(0, 0, "系统热键注册失败，请退出程序。");
	else
	{
		pDC->TextOut(0, 0, "系统热键 Alt + Z 注册成功。");
		pDC->TextOut(0, 20, "该热键调出一个消息对话框。");
		pDC->TextOut(0, 40, "请按此热键进行演示。");
	}
}

/////////////////////////////////////////////////////////////////////////////
// CMyHotKeyView diagnostics

#ifdef _DEBUG
void CMyHotKeyView::AssertValid() const
{
	CView::AssertValid();
}

void CMyHotKeyView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CMyHotKeyDoc* CMyHotKeyView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CMyHotKeyDoc)));
	return (CMyHotKeyDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMyHotKeyView message handlers

void CMyHotKeyView::OnInitialUpdate() 
{
	CView::OnInitialUpdate();
	// TODO: Add your specialized code here and/or call the base class
	//向操作系统添加一个全局原子Atom m_atomId，
	m_atomId = GlobalAddAtom("myHotKey");
	//设定ALT+Z为热键,尽量使用比较生疏的键。
    if(!RegisterHotKey(m_hWnd, m_atomId, MOD_ALT, 'Z'))
		m_bRegister = FALSE;
	else
		m_bRegister = TRUE;
}

//处理自定义系统热键消息的函数
void CMyHotKeyView::OnHotKey(WPARAM wParam, LPARAM lParam)
{
	if(m_atomId == wParam)MessageBox("系统热键 Alt+Z 被激活", "响应系统热键", MB_OK);
}