[转] 关于响应 WM_DRAWCLIPBOARD
这部分代码监视剪贴板中数据格式，只要剪贴板中数据变化，就在标题栏上显示出所有可识别的数据格式
1 // ClipSpyDlg.h : header file 2 // 3 4 #if !defined(AFX_CLIPSPYDLG_H_INCLUDED_) 5 #define AFX_CLIPSPYDLG_H_INCLUDED_ 6 7 #if _MSC_VER > 1000 8 #pragma once 9 #endif // _MSC_VER > 1000 10 11 ///////////////////////////////////////////////////////////////////////////// 12 // CClipSpyDlg dialog 13 14 class CClipSpyDlg : public CDialog 15 { 16 // Construction 17 public: 18 CClipSpyDlg(CWnd* pParent = NULL); // standard constructor 19 20 // Dialog Data 21 //{{AFX_DATA(CClipSpyDlg) 22 enum { IDD = IDD_CLIPSPY_DIALOG }; 23 // NOTE: the ClassWizard will add data members here 24 //}}AFX_DATA 25 26 // ClassWizard generated virtual function overrides 27 //{{AFX_VIRTUAL(CClipSpyDlg) 28 protected: 29 virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support 30 //}}AFX_VIRTUAL 31 32 // Implementation 33 protected: 34 HICON m_hIcon; 35 36 // Generated message map functions 37 //{{AFX_MSG(CClipSpyDlg) 38 virtual BOOL OnInitDialog(); 39 afx_msg void OnPaint(); 40 afx_msg HCURSOR OnQueryDragIcon(); 41 afx_msg void OnDrawClipboard(); 42 afx_msg void OnDestroy(); 43 afx_msg void OnChangeCbChain(HWND hWndRemove, HWND hWndAfter); 44 //}}AFX_MSG 45 DECLARE_MESSAGE_MAP() 46 private: 47 HWND m_hWndNextCBViewer; 48 }; 49 50 //{{AFX_INSERT_LOCATION}} 51 // Microsoft Visual C++ will insert additional declarations immediately before the previous line. 52 53 #endif // !defined(AFX_CLIPSPYDLG_H_INCLUDED_) 54 55 ////////////////////////////////////////////////////////////////////////////////// 56 // ClipSpyDlg.cpp : implementation file 57 // 58 59 #include "stdafx.h" 60 #include "ClipSpy.h" 61 #include "ClipSpyDlg.h" 62 63 #ifdef _DEBUG 64 #define new DEBUG_NEW 65 #undef THIS_FILE 66 static char THIS_FILE[] = __FILE__; 67 #endif 68 69 ///////////////////////////////////////////////////////////////////////////// 70 // CClipSpyDlg dialog 71 72 CClipSpyDlg::CClipSpyDlg(CWnd* pParent /*=NULL*/) 73 : CDialog(CClipSpyDlg::IDD, pParent) 74 { 75 //{{AFX_DATA_INIT(CClipSpyDlg) 76 // NOTE: the ClassWizard will add member initialization here 77 //}}AFX_DATA_INIT 78 // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 79 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); 80 81 //TODO: 变量初始化 82 m_hWndNextCBViewer=NULL; 83 } 84 85 void CClipSpyDlg::DoDataExchange(CDataExchange* pDX) 86 { 87 CDialog::DoDataExchange(pDX); 88 //{{AFX_DATA_MAP(CClipSpyDlg) 89 // NOTE: the ClassWizard will add DDX and DDV calls here 90 //}}AFX_DATA_MAP 91 } 92 93 BEGIN_MESSAGE_MAP(CClipSpyDlg, CDialog) 94 //{{AFX_MSG_MAP(CClipSpyDlg) 95 ON_WM_PAINT() 96 ON_WM_QUERYDRAGICON() 97 ON_WM_DRAWCLIPBOARD() 98 ON_WM_DESTROY() 99 ON_WM_CHANGECBCHAIN() 100 //}}AFX_MSG_MAP 101 END_MESSAGE_MAP() 102 103 ///////////////////////////////////////////////////////////////////////////// 104 // CClipSpyDlg message handlers 105 106 BOOL CClipSpyDlg::OnInitDialog() 107 { 108 CDialog::OnInitDialog(); 109 110 // Set the icon for this dialog. The framework does this automatically 111 // when the application's main window is not a dialog 112 SetIcon(m_hIcon, TRUE); // Set big icon 113 SetIcon(m_hIcon, FALSE); // Set small icon 114 115 //TODO: 将对话框加入剪贴板监视窗口链中 116 m_hWndNextCBViewer=SetClipboardViewer(); 117 118 return TRUE; // return TRUE unless you set the focus to a control 119 } 120 121 // If you add a minimize button to your dialog, you will need the code below 122 // to draw the icon. For MFC applications using the document/view model, 123 // this is automatically done for you by the framework. 124 125 void CClipSpyDlg::OnPaint() 126 { 127 if (IsIconic()) 128 { 129 CPaintDC dc(this); // device context for painting 130 131 SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); 132 133 // Center icon in client rectangle 134 int cxIcon = GetSystemMetrics(SM_CXICON); 135 int cyIcon = GetSystemMetrics(SM_CYICON); 136 CRect rect; 137 GetClientRect(&rect); 138 int x = (rect.Width() - cxIcon + 1) / 2; 139 int y = (rect.Height() - cyIcon + 1) / 2; 140 141 // Draw the icon 142 dc.DrawIcon(x, y, m_hIcon); 143 } 144 else 145 { 146 CDialog::OnPaint(); 147 } 148 } 149 150 // The system calls this to obtain the cursor to display while the user drags 151 // the minimized window. 152 HCURSOR CClipSpyDlg::OnQueryDragIcon() 153 { 154 return (HCURSOR) m_hIcon; 155 } 156 157 void CClipSpyDlg::OnDestroy() 158 { 159 //TODO: 从监视链中删除本监视窗口 160 ChangeClipboardChain( m_hWndNextCBViewer ); 161 162 CDialog::OnDestroy(); 163 } 164 165 void CClipSpyDlg::OnDrawClipboard() 166 { 167 //TODO: 剪贴板内容发生变化 168 CString sText("ClipSpy-"); 169 UINT CBFormat[]={ 170 CF_BITMAP, 171 CF_DIB, 172 CF_DIF, 173 CF_DSPBITMAP, 174 CF_DSPENHMETAFILE, 175 CF_DSPMETAFILEPICT, 176 CF_DSPTEXT, 177 CF_ENHMETAFILE, 178 CF_HDROP, 179 CF_LOCALE, 180 CF_METAFILEPICT, 181 CF_OEMTEXT, 182 CF_OWNERDISPLAY, 183 CF_PALETTE, 184 CF_PENDATA, 185 CF_RIFF, 186 CF_SYLK, 187 CF_TEXT, 188 CF_WAVE, 189 CF_TIFF 190 }; 191 char *FormatName[]={ 192 "CF_BITMAP", 193 "CF_DIB", 194 "CF_DIF", 195 "CF_DSPBITMAP", 196 "CF_DSPENHMETAFILE", 197 "CF_DSPMETAFILEPICT", 198 "CF_DSPTEXT", 199 "CF_ENHMETAFILE", 200 "CF_HDROP", 201 "CF_LOCALE", 202 "CF_METAFILEPICT", 203 "CF_OEMTEXT", 204 "CF_OWNERDISPLAY", 205 "CF_PALETTE", 206 "CF_PENDATA", 207 "CF_RIFF", 208 "CF_SYLK", 209 "CF_TEXT", 210 "CF_WAVE", 211 "CF_TIFF", 212 "未知格式或剪贴板中无数据" 213 }; 214 215 //打开剪贴板查询格式类型 216 if( OpenClipboard() ) 217 { 218 CString sCBAvailableFormat(""); 219 int nFormatNum=sizeof(CBFormat)/sizeof(UINT); 220 221 //枚举类型 222 for(int i=0;i<nFormatNum;i++) 223 { 224 if( ::IsClipboardFormatAvailable( CBFormat[i] ) ) 225 { 226 if( sCBAvailableFormat.IsEmpty() ) 227 sCBAvailableFormat+=FormatName[i]; 228 else 229 sCBAvailableFormat=sCBAvailableFormat+" & "+FormatName[i]; 230 } 231 } 232 233 if( !sCBAvailableFormat.IsEmpty() ) 234 sText+=sCBAvailableFormat;//列出有效格式 235 else 236 sText+=FormatName[i];//该格式未知 237 238 ::CloseClipboard(); 239 } 240 241 //在标题栏中显示格式 242 SetWindowText( sText ); 243 244 //传WM_DRAWCLIPBOARD给下一个监视窗口 245 ::SendMessage(m_hWndNextCBViewer,WM_DRAWCLIPBOARD,0,0); 246 } 247 248 void CClipSpyDlg::OnChangeCbChain(HWND hWndRemove, HWND hWndAfter) 249 { 250 // TODO: 监视链中窗口发生变动 251 if( m_hWndNextCBViewer==hWndRemove ) 252 m_hWndNextCBViewer=hWndAfter; 253 254 //传WM_CHANGECBCHAIN给下一个监视窗口 255 ::SendMessage(m_hWndNextCBViewer,WM_CHANGECBCHAIN, 256 (WPARAM)hWndRemove,(LPARAM)hWndAfter); 257 }
