simpletexttransferdlg.cpp

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// SimpleTextTransferDlg.cpp : implementation file
//

#include "stdafx.h"
#include "SimpleTextTransfer.h"
#include "SimpleTextTransferDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
public:
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
 
END_MESSAGE_MAP()


// CSimpleTextTransferDlg dialog



CSimpleTextTransferDlg::CSimpleTextTransferDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSimpleTextTransferDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSimpleTextTransferDlg::DoDataExchange(CDataExchange* pDX)
{
  CDialog::DoDataExchange(pDX);
  DDX_Control(pDX, ID_EDTTOCLIPBOARD, m_edtToClipboard);
  DDX_Control(pDX, ID_EDTFROMCLIPBOARD, m_edtFromClipboard);
}

BEGIN_MESSAGE_MAP(CSimpleTextTransferDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(ID_BTNCOPY, OnBnClickedBtncopy)
	ON_BN_CLICKED(ID_BTNCUT, OnBnClickedBtncut)
	ON_BN_CLICKED(ID_BTNPASTE, OnBnClickedBtnpaste)
END_MESSAGE_MAP()


// CSimpleTextTransferDlg message handlers

BOOL CSimpleTextTransferDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	m_edtToClipboard.SetWindowText("Sample data to copy to Clipboard");
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CSimpleTextTransferDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CSimpleTextTransferDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CSimpleTextTransferDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CSimpleTextTransferDlg::OnBnClickedBtncopy()
{
	if (UpdateData())
	{
		//获得数据
		CString strData;
		m_edtToClipboard.GetWindowText(strData);
		
		//打开系统剪贴板
		if (OpenClipboard())
		{
			//使用之前，清空系统剪贴板
			EmptyClipboard();
			
			//分配一内存，大小等于要拷贝的字符串的大小，返回一的内存控制句柄
			HGLOBAL hClipboardData;
			hClipboardData = GlobalAlloc(GMEM_DDESHARE, 
				strData.GetLength()+1);
			
			//内存控制句柄加锁，返回值为指向那内存控制句柄所在的特定数据格式的指针
			char * pchData;
			pchData = (char*)GlobalLock(hClipboardData);
			
			//将本地变量的值赋给全局内存
			strcpy(pchData, LPCSTR(strData));
			
			//给加锁的全局内存控制句柄解锁
			GlobalUnlock(hClipboardData);
			
			//通过全局内存句柄将要拷贝的数据放到剪贴板上
			SetClipboardData(CF_TEXT,hClipboardData);
		
			//使用完后关闭剪贴板
			CloseClipboard();
		}
	}
}

void CSimpleTextTransferDlg::OnBnClickedBtncut()
{
	//将数据放到剪贴板上，同时清空编辑框内的数据
	OnBnClickedBtncopy();
	m_edtToClipboard.SetWindowText("");
}

void CSimpleTextTransferDlg::OnBnClickedBtnpaste()
{
 //打开系统剪贴板
	if (OpenClipboard()) 
	{
		//判断剪贴板上的数据是否是指定的数据格式
		if (::IsClipboardFormatAvailable(CF_TEXT)
			|| ::IsClipboardFormatAvailable(CF_OEMTEXT))
		{
			// Retrieve the Clipboard data (specifying that 
			// we want ANSI text (via the CF_TEXT value).
			//从剪贴板上获得数据
			HANDLE hClipboardData = GetClipboardData(CF_TEXT);
			
			//通过给内存句柄加锁，获得指向指定格式数据的指针
			char *pchData = (char*)GlobalLock(hClipboardData);
			
			//本地变量获得数据
			CString strFromClipboard = pchData;
			m_edtFromClipboard.SetWindowText(strFromClipboard);
			
			//给内存句柄解锁
			GlobalUnlock(hClipboardData);
		}
		else
		{ 
			AfxMessageBox("There is no text (ANSI) data on the Clipboard.");
		}
		
		//使用完后关闭剪贴板
		CloseClipboard();
	}
}