用MFC實現(xiàn)簡單資源管理器

1、用VisualC+丁造自己的資源管理器Windows的資源管理器想必大家都用過，該程序的窗口一分為二，左邊的窗口顯示本機當前所有驅動器以及驅動器中的所有文件夾，當用戶單擊文件夾后，如果該文件夾下面還有子文件夾，則上層文件夾展開顯示下級的文件夾；否則，右邊的窗口顯示選擇文件夾下的文件。那么這個程序是如何實現(xiàn)的呢？為了說明這個問題，本實例打造了一個簡易的資源管理器，它實現(xiàn)了Windows資源管理器的主要功能，在顯示文件的屬性(如文件的文件名、文件的大小、文件的創(chuàng)建時間)的同時，還可以改變文件顯示的方式，如大小圖標方式、列表方式等。本實例代碼編譯運行后的界面效果如圖一所示：一、實現(xiàn)方法從上面的界面效

2、果圖可以看出，在程序中使用了拆分窗口，在拆分的過程中，左邊窗口為CTreeView類的子類CLeftView,右邊的窗口為CListView類的子類CdriveExplorerView。窗口的拆分和CTreeView、CListView類不是本實例講述的重點，相關的知識在本書的實例中都有介紹，讀者朋友可以參閱上述內容及實例的原代碼，這里主要介紹程序中一些具體的細節(jié)知識。資源管理器中一個重要的問題是如何得到本機中的驅動器信息，微軟提供的有關驅動器的API函數(shù)有GetLogicalDrives(),GetDriveType()。對于喜歡操作位和字節(jié)的匯編語言使用者來說，GetLogicalDriv

3、es()是個很好用的API函數(shù)。它以位掩碼的形式返回邏輯驅動器。即在一個DWORD類型的返回值中，位0(最小的一位)表示驅動器A,位1表示驅動器B,以此類推。每一個位的狀態(tài)如果是on,則表示對應的邏輯驅動器存在；否則狀態(tài)為off,表示對應的邏輯驅動器不存在。大家知道DWORD是一個32位的值，足以包括所有的英文字母，也就是說最多可有26個盤符。為了確定某個邏輯驅動器的類型，必須調用GetDriveType()函數(shù)。它以路徑名作為參數(shù)(如C:/),返回DRIVE_FIXEDDRIVE_REMOVABLE或DRIVE_UNKNOWN下面歹U出了所有可能返回的值：這些值在winbase.h定義：#

4、defineDRIVE_UNKNOWN0/無效路徑名# defineDRIVE_NO_ROOT_DIR1/無效路經(jīng)，如無法找到的卷標# defineDRIVE_REMOVABLE2可移動驅動器(如磁盤驅動器，光驅等)# defineDRIVE_FIXED3/固定的驅動器(如通常的硬盤)# defineDRIVE_REMOTE4/網(wǎng)絡馬區(qū)動器# defineDRIVE_CDROM5/CD-ROM# defineDRIVE_RAMDISK6/隨機存取(RAM)磁盤有了驅動器的信息，就可以使用FindFirstFile()、FindNextFile()等函數(shù)來獲取驅動器下面的文件或文件夾信息（這部分

5、），然后分別添加到樹型視圖和列表視圖中。最后要說明的一點是需要根據(jù)不同的狀態(tài)和文件類型在視圖中顯示不同的圖表，這些可以通過設置列表視圖的窗口風格、樹狀視圖的項目條的圖標來實現(xiàn)，具體參見代碼部分。二、編程步驟1、啟動VisualC+6.0,生成一個單文檔視圖的應用程序，視圖類的基類選擇CListView,項目命名為"DriveExplorer”,同時在項目中添加圖標資源、菜單和菜單響應函數(shù)（詳細內容參見原代碼）；2、 使用ClassWizard為項目添加新類CLeftView類，其基類選擇CtreeView;3、添加代碼，編譯運行程序。三、程序代碼/LeftView.h:interfa

6、ceoftheCLeftViewclass#if!defined(AFX_LEFTVIEW_H_29F66875_4E46_11D6_9693_B383368EF622_INCLUDED_)#defineAFX_LEFTVIEW_H_29F66875_4E46_11D6_9693_B383368EF622_INCLUDED_#if_MSC_VER>1000#pragmaonce#endif/_MSC_VER>1000classCDriveExplorerDoc;classCLeftView:publicCTreeView(protected:/createfromserializa

7、tiononlyCLeftView();DECLARE_DYNCRTE(CLeftView)/Attributespublic:CDriveExplorerDoc*GetDocument();CImageList*m_pImageList;CStringm_LocalPath;/Operationspublic:BOOLHasSubdirectory(CString&strPathName);BOOLIsDriveNode(HTREEITEMhItem);voidSetButtonState(HTREEITEMhItem,CString&strPathName);UINTAdd

8、DirectoryNodes(HTREEITEMhItem,CString&strPathName);BOOLIsMediaValid(CString&strPathName);HTREEITEMGetDriveNode(HTREEITEMhItem);UINTDeleteChildren(HTREEITEMhItem);BOOLIsPathValid(CString&strPathName);CStringGetPathFromItem(HTREEITEMhItem);voidAddDummyNode(HTREEITEMhItem);voidInitTreeView(

9、HTREEITEMhParent);BOOLAddDrives(CStringstrDrive,HTREEITEMhParent);/Overrides/ClassWizardgeneratedvirtualfunctionoverrides/AFX_VIRTUAL(CLeftView)public:virtualvoidOnDraw(CDC*pDC);/overriddentodrawthisviewvirtualBOOLPreCreateWindow(CREATESTRUCT&cs);protected:virtualBOOLOnPreparePrinting(CPrintInfo

10、*pInfo);virtualvoidOnBeginPrinting(CDC*pDC,CPrintInfo*pInfo);virtualvoidOnEndPrinting(CDC*pDC,CPrintInfo*pInfo);virtualvoidOnInitialUpdate();/calledfirsttimeafterconstruct/AFX_VIRTUAL/Implementationpublic:virtualCLeftView();#ifdef_DEBUGvirtualvoidAssertValid()const;virtualvoidDump(CDumpContext&d

11、c)const;#endifprotected:/Generatedmessagemapfunctionsprotected:/AFX_MSG(CLeftView)/NOTE-theClassWizardwilladdandremovememberfunctionshere./DONOTEDITwhatyouseeintheseblocksofgeneratedcode!afx_msgvoidOnDestroy();afx_msgvoidOnItemexpanding(NMHDR*pNMHDR,LRESULT*pResult);afx_msgvoidOnSelchanging(NMHDR*pN

12、MHDR,LRESULT*pResult);/AFX_MSGDECLARE_MESSAGE_MAP();#ifndef_DEBUG/debugversioninLeftView.cppinlineCDriveExplorerDoc*CLeftView:GetDocument()return(CDriveExplorerDoc*)m_pDocument;#endif#endif/CLeftView#include"stda僅.h"#include"DriveExplorer.h"#include"DriveExplorerDoc.h"#

13、include"LeftView.h"#include"DriveExplorerView.h"#ifdef_DEBUG#definenewDEBUG_NEW#undefTHIS_FILEstaticcharTHIS_FILE口=_FILE_;#endif#defineILI_CDDRV0#defineILI_CLSDFLD1#defineILI_DRIVE2#defineILI_FLOPPYDRV3#defineILI_MYCOMP4#defineILI_OPENFLD5#defineILI_TEXTFILE6#defineMYCOMPUTER&quo

14、t;MyComputer"IMPLEMENT_DYNCREATE(CLeftVie,wCTreeView)BEGIN_MESSAGE_MAP(CLeftView,CTreeView)/AFX_MSG_MAP(CLeftView)/NOTE-theClassWizardwilladdandremovemappingmacroshere./DONOTEDITwhatyouseeintheseblocksofgeneratedcode!ON_WM_DESTROY()ON_NOTIFY_REFLECT(TVN_ITEMEXPANDING,OnItemexpanding)ON_NOTIFY_R

15、EFLECT(TVN_SELCHANGING,OnSelchanging)/AFX_MSG_MAP/StandardprintingcommandsON_COMMAND(ID_FILE_PRINT,CTreeView:OnFilePrint)ON_COMMAND(ID_FILE_PRINT_DIRECT,CTreeView:OnFilePrint)ON_COMMAND(ID_FILE_PRINT_PREVIEWCTreeView:OnFilePrintPreview)END_MESSAGE_MAP()/CLeftViewconstruction/destructionCLeftView:CLe

16、ftView()/TODO:addconstructioncodehereCLeftView:CLeftView()BOOLCLeftView:PreCreateWindow(CREATESTRUCT&cs)/TODO:ModifytheWindowclassorstylesherebymodifyingtheCREATESTRUCTcscs.style|=TVS_HASBUTTONS|TVS_LINESATROOT|TVS_HASLINES;returnCTreeView:PreCreateWindow(cs);voidCLeftView:OnDraw(CDC*pDC)(CDrive

17、ExplorerDoc*pDoc=GetDocument();ASSERT_VALID(pDoc);/TODO:adddrawcodefornativedatahereBOOLCLeftView:OnPreparePrinting(CPrintInfo*pInfo)(/defaultpreparationreturnDoPreparePrinting(pInfo);voidCLeftView:OnBeginPrinting(CDC*/*pDC*/,CPrintInfo*/*pInfo*/)(/TODO:addextrainitializationbeforeprintingvoidCLeftV

18、iew:OnEndPrinting(CDC*/*pDC*/,CPrintInfo*/*pInfo*/)(/TODO:addcleanupafterprintingvoidCLeftView:OnInitialUpdate()(CTreeView:OnInitialUpdate();m_pImageList=newCImageList();CWinApp*pApp=AfxGetApp();/ASSERT(m_pImageList!=NULL);/seriousallocationfailurecheckingm_pImageList->Create(16,16,ILC_COLOR8|ILC

19、_MASK,9,9);m_pImageList->Add(pApp->LoadIcon(ICO_CDDRV);m_pImageList->Add(pApp->LoadIcon(ICO_CLSDFLD);m_pImageList->Add(pApp->LoadIcon(ICO_DRIVE);m_pImageList->Add(pApp->LoadIcon(ICO_FLOPPYDRV);m_pImageList->Add(pApp->LoadIcon(ICO_MYCOMP);m_pImageList->Add(pApp->Lo

20、adIcon(ICO_OPENFLD);m_pImageList->Add(pApp->LoadIcon(ICO_TEXTFILE);GetTreeCtrl().SetImageList(m_pImageList,TVSIL_NORMAL);HTREEITEMhParent=GetTreeCtrl().InsertItem(MYCOMPUTER,ILI_MYCOMPLI_MYCOMP);InitTreeView(hParent);GetTreeCtrl().Expand(hParent,TVE_EXPAND);)#ifdef_DEBUGvoidCLeftView:AssertVal

21、id()constCTreeView:AssertValid();)voidCLeftView:Dump(CDumpContext&dc)constCTreeView:Dump(dc);)CDriveExplorerDoc*CLeftView:GetDocument()/non-debugversionisinlineASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDriveExplorerDoc);return(CDriveExplorerDoc*)m_pDocument;)#endif/_DEBUGvoidCLeftView:InitT

22、reeView(HTREEITEMhParent)intnPos=0;UINTnCount=0;CStringstrDrive="?:/"DWORDdwDriveList=:GetLogicalDrives();CStringcTmp;while(dwDriveList)if(dwDriveList&1)cTmp=strDrive;strDrive.SetAt(0,0x41+nPos);if(AddDrives(strDrive,hParent)nCount+;)dwDriveList>>=1;nPos+;)return;)BOOLCLeftView:A

23、ddDrives(CStringstrDrive,HTREEITEMhParent)HTREEITEMhItem;UINTnType=:GetDriveType(LPCTSTR)strDrive);UINTnDrive=(UINT)strDrive0-0x41;switch(nType)caseDRIVE_REMOVABLE:hItem=GetTreeCtrl().InsertItem(strDrive,ILI_FLOPPYDRV,ILI_FLOPPYDRV,hParent);AddDummyNode(hItem);break;caseDRIVE_FIXED:hItem=GetTreeCtrl

24、().InsertItem(strDrive,ILI_DRIVE,ILI_DRIVE,hParent);AddDummyNode(hItem);break;caseDRIVE_REMOTE:hItem=GetTreeCtrl().InsertItem(strDrive,ILI_DRIVE,ILI_DRIVE,hParent);AddDummyNode(hItem);break;caseDRIVE_CDROM:hItem=GetTreeCtrl().InsertItem(strDrive,ILI_CDDRV,ILI_CDDRV,hParent);AddDummyNode(hItem);break

25、;caseDRIVE_RAMDISK:hItem=GetTreeCtrl().InsertItem(strDrive,ILI_CDDRV,ILI_CDDRV,hParent);AddDummyNode(hItem);break;default:returnFALSE;returntrue;voidCLeftView:OnDestroy()CTreeView:OnDestroy();/TODO:Addyourmessagehandlercodehereif(m_pImageList!=NULL)m_pImageList=NULL;deletem_pImageList;voidCLeftView:

26、AddDummyNode(HTREEITEMhItem)GetTreeCtrl().InsertItem("",0,0,hItem);CStringCLeftView:GetPathFromItem(HTREEITEMhItem)(CStringstrPathName;while(hItem!=NULL)(CStringstring=GetTreeCtrl().GetItemText(hItem);if(string.Right(1)!="/")&&!strPathName.IsEmpty()string+="/"st

27、rPathName=string+strPathName;hItem=GetTreeCtrl().GetParentItem(hItem);)if(strPathName.Left(11)=MYCOMPUTER&&strPathName.GetLength()>11)strPathName=strPathName.Mid(12);returnstrPathName;)BOOLCLeftView:IsPathValid(CString&strPathName)(if(strPathName.GetLength()=3)returnTRUE;HANDLEhFind;W

28、IN32_FIND_DATAfd;BOOLbResult=FALSE;if(hFind=:FindFirstFile(LPCTSTR)strPathName,&fd)!=INVALID_HANDLE_VALUE)if(fd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)bResult=TRUE;二CloseHandle(hFind);)returnbResult;)BOOLCLeftView:IsMediaValid(CString&strPathName)/ReturnTRUEifthedrivedoesn'tsuppor

29、tremovablemedia.UINTnDriveType=GetDriveType(LPCTSTR)strPathName);if(nDriveType!=DRIVE_REMOVABLE)&&(nDriveType!=DRIVE_CDROM)returnTRUE;)HTREEITEMCLeftView:GetDriveNode(HTREEITEMhItem)HTREEITEMhParent;dohParent=GetTreeCtrl().GetParentItem(hItem);if(hParent!=NULL)hItem=hParent;while(hParent!=NU

30、LL);returnhItem;UINTCLeftView:DeleteChildren(HTREEITEMhItem)UINTnCount=0;HTREEITEMhChild=GetTreeCtrl().GetChildItem(hItem);while(hChild!=NULL)HTREEITEMhNextItem=GetTreeCtrl().GetNextSiblingItem(hChild);GetTreeCtrl().DeleteItem(hChild);hChild=hNextItem;nCount+;returnnCount;UINTCLeftView:AddDirectoryN

31、odes(HTREEITEMhItem,CString&strPathName)HANDLEhFind;WIN32_FIND_DATAfd;UINTnCount=0;CStringstrFileSpec=strPathName;if(strFileSpec.Right(1)!="/")strFileSpec+="/"strFileSpec+="*.*"if(hFind=:FindFirstFile(LPCTSTR)strFileSpec,&fd)=INVALID_HANDLE_VALUE)if(IsDriveNode(

32、hItem)AddDummyNode(hItem);return0;CWaitCursorwait;CDriveExplorerDoc*pDoc=GetDocument();pDoc->m_ExplorerView->DeleteAllItems();doif(fd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)CStringstrFileName=(LPCTSTR)&fd.cFileName;if(strFileName!=".")&&(strFileName!=".")

33、&&(fd.dwFileAttributes!=22)HTREEITEMhChild=GetTreeCtrl().InsertItem(LPCTSTR)&fd.cFileName,ILI_CLSDFLD,ILI_OPENFLD,hItem,TVI_SORT);CStringstrNewPathName=strPathName;if(strNewPathName.Right(1)!="/")strNewPathName+="/"strNewPathName+=(LPCTSTR)&fd.cFileName;SetButtonS

34、tate(hChild,strNewPathName);nCount+;)else(pDoc->m_ExplorerView->AddToListView(&fd);)while(二FindNextFile(hFind,&fd);:FindClose(hFind);returnnCount;voidCLeftView:SetButtonState(HTREEITEMhItem,CString&strPathName)(if(HasSubdirectory(strPathName)AddDummyNode(hItem);BOOLCLeftView:HasSub

35、directory(CString&strPathName)(HANDLEhFind;WIN32_FIND_DATAfd;BOOLbResult=FALSE;CStringstrFileSpec=strPathName;if(strFileSpec.Right(1)!="/")strFileSpec+="/"strFileSpec+="*.*"if(hFind=:FindFirstFile(LPCTSTR)strFileSpec,&fd)!=INVALID_HANDLE_VALUE)(doif(fd.dwFileAtt

36、ributes&FILE_ATTRIBUTE_DIRECTORY)CStringstrFileName=(LPCTSTR)&fd.cFileName;if(strFileName!=".")&&(strFileName!=".")bResult=TRUE;while(二FindNextFile(hFind,&fd)&&!bResult);:FindClose(hFind);)returnbResult;)BOOLCLeftView:IsDriveNode(HTREEITEMhItem)(return

37、(GetTreeCtrl().GetParentItem(hItem)=NULL)?TRUE:FALSE;)voidCLeftView:OnItemexpanding(NMHDR*pNMHDR,LRESULT*pResult)(NM_TREEVIEW*pNMTreeView=(NM_TREEVIEW*)pNMHDR;HTREEITEMhItem=pNMTreeView->itemNew.hItem;CStringstrPathName=GetPathFromItem(hItem);if(!IsMediaValid(strPathName)(HTREEITEMhRoot=GetDriveN

38、ode(hItem);GetTreeCtrl().Expand(hRoot,TVE_COLLAPSE);DeleteChildren(hRoot);AddDummyNode(hRoot);*pResult=TRUE;return;)/DeletetheitemifstrPathNamenolongerspecifiesavalidpath.if(!IsPathValid(strPathName)(if(strPathName!=MYCOMPUTER&&strPathName!="")(GetTreeCtrl().DeleteItem(hItem);*pRes

39、ult=TRUE;return;)CWaitCursorwait;if(pNMTreeView->action=TVE_EXPAND)(if(strPathName!=MYCOMPUTER)(DeleteChildren(hItem);if(!AddDirectoryNodes(hItem,strPathName)*pResult=TRUE;)elseif(strPathName!=MYCOMPUTER)DeleteChildren(hItem);if(IsDriveNode(hItem)AddDummyNode(hItem);elseSetButtonState(hItem,strPa

40、thName);m_LocalPath=strPathName;*pResult=0;voidCLeftView:OnSelchanging(NMHDR*pNMHDR,LRESULT*pResult)NM_TREEVIEW*pNMTreeView=(NM_TREEVIEW*)pNMHDR;/TODO:AddyourcontrolnotificationhandlercodehereHTREEITEMhItem=pNMTreeView->itemNew.hItem;CStringstrPathName=GetPathFromItem(hItem);*pResult=FALSE;if(str

41、PathName=MYCOMPUTER)return;CWaitCursorwait;if(!AddDirectoryNodes(hItem,strPathName)*pResult=TRUE;m_LocalPath=strPathName;*pResult=0;/DriveExplorerView.h:interfaceoftheCDriveExplorerViewclass#if!defined(AFX_DRIVEEXPLORERVIEW_H_29F66873_4E46_11D6_9693_B383368EF622_INCLUDED_)#defineAFX_DRIVEEXPLORERVIE

42、W_H_29F66873_4E46_11D6_9693_B383368EF622_INCLUDED_#if_MSC_VER>1000#pragmaonce#endif/_MSC_VER>1000classCDriveExplorerView:publicCListViewprotected:/createfromserializationonlyCDriveExplorerView();DECLARE_DYNCRETAE(CDriveExplorerView)/Attributespublic:CDriveExplorerDoc*GetDocument();CImageList*m_pImageList;CImageList*m_pImageListL;/Operationspublic:/Overrides/ClassWizardgeneratedvirtualfunctionoverridesAFX_VIRTUAL(C