華東交大印度外教課程applwizardsathya

TheVC++Environment-BuildingyourfirstVC++Application

FocuswillbeonlearningabouttheVisualC++developmentenvironmentandsomeofthetoolsthatitprovidesforbuildingapplications.TodaysTopicsTheprimaryareasoftheVisualC++developmentenvironmentTheApplicationWizard:howyoucanuseittobuildthebasicinfrastructureforyourapplicationsTheDialogPainter:howyoucanuseittopaintdialogwindows,muchinthesamewaythatyoucanbuildwindowswithVisualBasic,PowerBuilder,orDelphiVC++DevelopmentEnvironmentTheClassWizard—howyoucanuseittoattachfunctionalitytoyourapplicationWindowsTheWorkspaceWhenyoustartVisualC++forthefirsttime,anareaontheleftsideofDeveloperStudiolookslikeitistakingupalotofrealestateandprovidinglittletoshowforit.Thisareaisknownastheworkspace.

TheWorkSpace

Itisyourkeytonavigatingthevariouspiecesandpartsofyourdevelopmentprojects.Theworkspaceallowsyoutoviewthepartsofyourapplicationinthreedifferentways:

Contind…

ClassViewallowsyoutonavigateandmanipulateyoursourcecodeonaC++classlevel.

ResourceViewallowsyoutofindandediteachofthevariousresourcesinyourapplication,includingdialogwindowdesigns,icons,andmenus.

FileViewallowsyoutoviewandnavigateallthefilesthatmakeupyourapplicationTheVisualC++OpeningScreenWorkspacepaneOutputpaneEditorareaWizardtoolbarBuildminibarStandardtoolbarTheOutputPaneTheOutputpaneiswhereDeveloperStudioprovidesanyinformationthatitneedstogiveyou;whereyouseeallthecompilerprogressstatements,warnings,anderrormessages.VisualC++debuggerdisplaysallthevariableswiththeircurrentvaluesasyoustepthroughyourcode.Contd..AfteryouclosetheOutputpane,itreopensitselfwhenVisualC++hasanymessagethatitneedstodisplayforyou.TheEditorAreaTheareaontherightsideoftheDeveloperStudioenvironmentistheeditorarea.TheEditorAreatheareawhereyouperformallyoureditingwhenusingVisualC++wherethecodeeditorwindowsdisplaywhenyoueditC++sourcecodewherethewindowpainterdisplayswhenyoudesignadialogbox.isevenwheretheiconpainterdisplayswhenyoudesigntheiconsforuseinyourapplications.MenuBarsThethreetoolbarsthatareinitiallyopenarethefollowing:?TheStandardtoolbarcontainsmostofthestandardtoolsforopeningandsavingfiles,cutting,copying,pasting,andavarietyofothercommandsthatyouarelikelytofinduseful.TheWizardBartoolbarenablesyoutoperformanumberofClassWizardactionsContd..withoutopeningtheClassWizard.TheBuildminibarprovidesyouwiththebuildandruncommandsthatyouaremostlikelytouseasyoudevelopandtestyourapplications.ThefullBuildtoolbaralsoletsyouswitchbetweenmultiplebuildconfigurations(suchasbetweentheDebugandReleasebuildconfigurations).StartingYourFirstProjectTocreateasimpleapplicationthatPresentstheuserwithtwobuttons,asinFigure(a).Thefirstbuttonwillpresenttheuserwithasimplegreetingmessage,showninFigure(b),andthesecondbuttonwillclosetheapplicationBuildinganApplicationStep1:Createanewprojectworkspace.Step2:UsetheApplicationWizardtocreatetheapplicationframework.Step3:RearrangethedialogthatisautomaticallycreatedbytheApplicationWizardtoresemblehowyouwanttheapplicationtolook.CONTD..Step4:AddtheC++codetoshowthegreetingtotheuser.Step5:Createanewiconfortheapplication.FIGURE(a)YourfirstVisualC++ApplicationCONTD..

Iftheuserclicksthefirstbutton,asimplegreetingisshown.FIGURE(b)CreatingtheProjectWorkspaceSelectFile|New.ThisopenstheNew

WizardshowninFigure(c)TheNewWizardFigure(c)Contd..2.OntheProjectstab,selectMFCAppWizard(exe).3.Typeanameforyourproject,suchasHello,intheProjectNamefield.4.ClickOK.ThiscausestheNewWizardtodotwothings:createaprojectdirectoryandthenstarttheAppWizardUsingtheApplicationWizardtoCreatethe

ApplicationShellInStep1oftheAppWizard,specifythataDialog-basedapplicationistobecreatedandClickNextatthebottomofthewizardInStep2ofAppWizard,unchecktheoptionforincludingsupportforActiveXcontrols.Inthefieldnearthebottomofthewizard,deletetheprojectnameandtypethetitletoappearinthetitlebarofthemainapplicationwindowandclickNext.Contd..4.InStep3oftheAppWizard,leavethedefaultsforincludingsourcefilecommentsandusingtheMFClibraryasaDLLandClickNext.5.ThefinalstepoftheAppWizardshowsyoutheC++classesthattheAppWizardwillcreateforyourapplication.ClickFinishtoletAppWizardgenerateyourapplication.Contd..

6.BeforeAppWizardcreatesyourapplicationshell,itpresentsyouwithalistofwhatitisgoingtoputintotheapplicationshell,asshowninFigure(d)ClickOKandAppWizardgeneratesyourapplication.TheNewProject

InformationscreenFIGURE(d)7.AftertheAppWizardgeneratesyourapplicationshell,youarereturnedtotheDeveloperStudioenvironment.Theworkspacepanenowpresentsatreeviewoftheclassesinyourapplicationshell,asinFigure(e)inthenextpage.YoumightalsobepresentedwiththemaindialogwindowintheeditorareaoftheDeveloperStudioarea.Contd..8.SelectBuild|BuildHello.exetocompileyourapplication.9.AstheVisualC++compilerbuildsyourapplication,youseeprogressandothercompilermessagesscrollbyintheOutputpane.Afteryourapplicationisbuilt,theOutputpaneshoulddisplayamessagetellingyouthattherewerenoerrorsorwarnings,asinFigure(f).TheOutputpanedisplays

anycompilererrorsFIGURE(f)Contd…10.SelectBuild|ExecuteHello.exetorunyourapplication.11.YourapplicationpresentsadialogwithaTODOmessageandOKandCancelbuttons,asshowninFigure(g).Youcanclickeitherbuttontoclosetheapplication.TheunmodifiedapplicationshellFIGURE(g)DesigningYourApplicationWindowSelecttheResourceViewtabintheworkspacepane,asinFigure(h)2.Expandtheresourcestreetodisplaytheavailabledialogs.Atthispoint,youcandouble-clicktheDD_DAY1_DIALOGdialogtoopenthewindowintheDeveloperStudioeditorarea.TheResourceViewtab

intheworkspacepaneFIGURE(h)Contd..3.SelectthetextdisplayedinthedialoganddeleteitusingtheDeletekey.4.SelecttheCancelbutton,dragitdowntothebottomofthedialog,andresizeitsoatitisthefullwidthofthelayoutareaofthewindow,asinFigure(i)Contd..PositioningtheCancelButtonFIGURE(i)5.Right-clickthemouseovertheCancelbutton,openingthepop-upmenuinFigure(k).SelectPropertiesfromthemenu,andthepropertiesdialogopensasinfigure(l)Right-clickingthe

mousetoopenapopupmenuFIGURE(k)TheCancelbutton

propertiesdialog.FIGURE(l)6.ChangethevalueintheCaptionfieldto&Close.ClosethepropertiesdialogbyclickingtheCloseiconintheupper-rightcornerofthedialog.Contd..7.MoveandresizetheOKbuttontoaroundthemiddleofthewindow,asinFigure(m).PositioningtheOKButtonFIGURE(m)Contd..8.OntheOKbuttonpropertiesdialog,changetheIDvaluetoIDHELLOandthecaptionto&Hello.9.Compileandrunyourapplication.RunningyourredesignedapplicationAddingCodetoYourApplicationToattachsomefunctionalitytotheHellobutton,right-clickoverthebuttonandselectClassWizardfromthepop-upmenu2.IfyouhadtheHellobuttonselectedwhenyouopenedtheClassWizard,itisalreadyselectedinthelistofavailableObjectIDs,asinFigure(n)TheClassWizardFIGURE(n)Contd..3.WithIDHELLOselectedintheObjectIDlist,selectBN_CLICKEDinthelistofmessagesandclickAddFunction.ThisopenstheAddMemberFunctiondialogshowninFigure(o).Thisdialogcontainsasuggestionforthefunctionname.ClickOKtocreatethefunctionandaddittothemessagemap.TheClassWizardAdd

MemberFunctiondialogFIGURE(o)4.AfterthefunctionisaddedfortheclickmessageontheHellobutton,selecttheOnHellofunctioninthelistofavailablefunctions,asinFigure(p)Contd..ClicktheEditCodebuttonsothatyourcursorispositionedinthesourcecodeforthefunction,rightatthepositionwhereyoushouldaddyourfunctionalityThelistofavailable

functionsintheClassWizard.FIGURE(p)Contd..5.AddthecodeinListing1.1justbelowtheTODOcommentline,asshowninFigure(q)Listing1.1VoidCHelloDlg::OnHello(){//TODO:Addyourcontrolnotificationhandlercodehere//Sayhellototheuser

MessageBox(“Hello.ThisismyfirstVisualC++Application!”);}MessageDisplay6.Whenyoucompileandrunyourapplication,theHellobuttonshoulddisplaythemessageshowninFigure(r)FIGURE(r)FinishingTouches?Creatingthedialogboxicon?AddingmaximizeandminimizebuttonsCreatingtheDialogBoxIconYouneedtoedittheapplicationicontodisplayanimagethatyoudowanttorepresentyourapplication.Inthetreeviewofyourapplicationresourcesintheworkspacepane,expandtheiconbranchandselecttheIDR_MAINFRAMEicon,asinFigure1.22.ThisbringstheapplicationiconintotheeditorareaoftheDeveloperStudio.ThestandardMFC

icon.FIGURE1.22.Contd..2.Usingthepaintingtoolsprovided,repainttheicontodisplayan