Qt介紹與計算其有關(guān)的外文資料

.IntheUnitedStatesinFebruary15,1946,UniversityofPennsylvania,theworld'sfirstelectroniccalculatorENIACofficiallyputintooperation.Thegrandopeningceremony,ENIACshowits"uniqueskill":inasecond5000additionoperations;withinonesecondof500multiplicationoperations.Thiswasthefastestelectriccalculatoroperationspeedto1000times.Theaudiencestoodupandcheered,cheerthescienceandtechnologyhasenteredanewhistoricalperiodofdevelopment.However,technicallyspeaking,ENIAChasnotyetbeenofficiallyrunningisalmostoutofdate.Becauseinitsformaloperationbefore,anewelectroniccalculatordesignreport,andinthehistoryofthedevelopmentofcalculatortreehadanewmilepost!Thedesignofthedraftingofthereport,twentiethCenturyisgiftedmasterofmathematics,theHungarian-AmericanmathematicianofvonNeumann.InDecember28,1903,Rev.ImanwasborninBudapest,hungary.Healwaysshowsamazinggiftformathematics,itissaidthatinthe6yearsoldcando8Mathematicsdivision,8yearsoldwhenhemasteredcalculus,12yearsoldwhenhereadaprofoundmathematicalwritings"function"!Later,vonNeumanninHungary."Mathematics"undertheguidanceofthefatherFeiyeer,havereceivedstricttraining.Attheageof18,heandtheguidanceofteachercooperationinforeigncountries,themagazinepublishedthefirstmathematicalpapers.精品文檔放心下載.In1926,Neumannvon.AlmostatthesametimegraduatedfromtheUniversityintwo:ZurichHigherInstituteoftechnology"chemicalengineering"diploma;attheUniversityofBudapesttoobtainmathematicalPhDcertificate.精品文檔放心下載In1930,Rev.NeumannwenttotheUnitedStates,washiredasthevisitingprofessorofPrincetonUniversity.3yearslater,only30yearsold,Neumannvon.WithgreatscientistEinstein,PrincetonbecamethefirstpermanentmemberoftheInstituteforadvancedstudy.感謝閱讀WiththeRev.Neumannworkedwithpeople,recognizedhistalent.Histeacher,thefamousmathematicianPolyasaid:"Rev.Neumannismyonlyfearthestudent,ifIinspeecharelistedinapuzzle,sowhenItheendofhisspeech,healwaystookapieceofpaperthathasbeenscribbledtheproblemout."Once,amathematicianonaproblemof5caseswithhandcalculatorcalculateanovernight,theverynextdaytoconsultFeng.Neumann,hejust7minutestofigureoutalltheanswers,then,Neumannvon.Abouthalfanhour,andfoundabetter.Algorithm.However,Rev.Neumann'swifefindshim"alittlegeometricsensenor.Once,sheletvon.Neumanntofetchacupofwater,Rev.Neumanninthishousefor17yearsoflife,doesn'tknowwhereheplacedinthecup,round,comebackagainaskedhiswifewhereglass...Onthechoresoflifebeabsent-minded,reflectedfromtheothersideofhisscientific精品文檔放心下載.researchfocus.Neumannvon.Studyquestionconcentrated,sokeentocapturetheessenceoftheproblem.感謝閱讀Before1940,Rev.Neumannonmathematicalpagesofferconcentratedinpuremathematics.Hehasstudied"operatorring"fieldfor20years,hasbeeninthefieldbeyondalldisputetheauthorityoftheworld;hisotherXiangHuihuang'sscientificachievements,ispartofthesolutiontotheproblemofHilbertfifth,tocompletelysolvethismathproblemhasmadeasignificantcontributiontothefamous.感謝閱讀In1940,Rev.Neumannactivelyinvolvedintheanti-fascistwartorrent,startedfromthepuremathematicianstooutstandingappliedmathematicianstransformationprocess.Duringthewar,hewasappointedtotheUnitedStatesNavalOrdnanceBureauunitsandmanyotherconsultants,butalsodirectlyinvolvedinthedevelopmentofnuclearweaponswork,forthedesignoftheoptimalstructureoftheatomicbombandputforwardmanyimportantsuggestions.精品文檔放心下載Rev.Neumannhasanoutstandingadvantage,isgoodatthepeoplethatcannotusethemathematicaltreatmentoftheactualproblemtobeaxiomatic,systematic,theabstractmathematicaltheoryskillfullyappliedtoreallifefield.Forexample,abusinessmanindozensoftrading,traderswillseektobenefittheirownoptimalstrategy,themathematicsisfarmorecomplexthanthesolarsystemplanetsmotion,von.Neumanndaredtoadvancedespitedifficulties,withaseriesofmathematical謝謝閱讀.creativerevealedthiskindofphenomenon,whichlaidthefoundationofthisbranchofmathematicsofgametheoryonthebasisof.感謝閱讀Neumannvon.Oncalculatorscientificcontributions,especiallyforpeopletoappreciate.Interestingly,introduceshimtothisfieldispurelybychance.精品文檔放心下載Thesummerof1944,Rev.Neumannatatrainstation,mettheENIACdevelopmentteamisresponsibleforoneofthemathematician,Goldsteinlieutenant.Atthattime,Rev.Neumannisatomicbombexperimentmetalargenumberofcomputationalproblemsanddistress,suchasthenuclearfissionreactionprocessproblem,needtobebillionsoftimeselementaryarithmeticoperations,hundredsoffemalecomputerwithdesktopcomputingworkeddayandnight,stillcan'tfinishthetaskontime.InthedativeEdelsteinLieutenantchatvon.NeumannheardENIACbeingdevelopedbythenews,immediatelyunderstoodtheworkofprofoundsignificance.Soonafter,hebecameadevelopmentteamregulars,andthesolutionofsomekeyproblemscontributedto.感謝閱讀Atthattime,ENIACdevelopmentworkalreadynearedend,von.NeumannandtogetherfocusedonENIACdeficiencies.In1945March,hedrafteda"electronicdiscretevariableautomaticcalculator"ofthedesignreport,theENIACmadetwoimportantimprovements.謝謝閱讀Animprovementisthebandof10to2m,thusgreatlysimplifyingthecalculatorstructureandoperationprocess;anotherimprovementisthe精品文檔放心下載.programwiththedatastoredinthecalculator,thecalculatorofthewholeoperationofatrulyautomaticprocess.精品文檔放心下載Thedesignreportisthecalculatorstructurethoughtofoneofthemostimportantreform,markedtherealbeginningoftheageofelectroniccalculator.Alwayspursuepost-secondaryAcademicInstituteforadvancedstudyinPrinceton,alsoanapprovedvonNeumanndevelopmentwork.Sincethen,hisnewdesignidea,deeplybrandedinthebasicdesignofmodernelectroniccalculator.TheWesternscientiststovon.Neumann'sworkgaveahighevaluation,regardhimasthe"fatheroftheelectroniccalculator.謝謝閱讀Later,Rev.Neumanngoesfurthertoresearchtheautomatatheory,withamazingperseverancetoovercomethepainofcancer,explorethecalculatorandthehumanbrainmechanismsofsimilarphenomenon.Unfortunately,inFebruary8,1957,"calculator"aboutbrainanddonotfinish,Rev.Neumannwascancerclaimedthelivesof.精品文檔放心下載Rev.Neumannhaslefttheworldrichscientificheritage.IntwentiethCenturyhewasthemostprolificofoneofthescientists,intheoreticalphysics,economics,meteorologyandmanyotherscientificfields,alsolefthistoiltrail.Forexample,earlyinhislifehewrote"themathematicalfoundationofquantummechanics"onebook,thefirstquantummechanicsintothestrictmathematicalsystems,arestilltheoreticalphysicsclassics.Theexpertspointedout:"ifthetimehastoexplorevon.謝謝閱讀.Neumann'spersonalambitionandacademicachievement,thereisdiscussionofthepast30yearsthehistoryofscientificdevelopmentoutline."精品文檔放心下載By1956,thewholeworldhasproducedthousandsoflargeelectroniccomputer,someofwhichhavehighcomputingspeedoftensofthousandsoftimespersecond.Theseelectroniccalculatortovacuumtubeasthemaincomponent,itiscalledavacuumtubecomputer.Useofthisgenerationofelectroniccalculator,thesatellitewassentontheday.Thisisthefirstgenerationofelectroniccalculator.謝謝閱讀Thesecondgenerationofelectroniccalculatorisatransistorcalculator.In1956,theUnitedStatesBaerlaboratorytransistorsinsteadofvacuumtubes,madetheworld'sfirstalltransistorcalculatorLepreachaun.Itmakesthevolume,weight,powerconsumptioncalculatoraregreatlyreduced.To60time,theworldhasproducedmorethan3Taiwantransistorcalculator,operationalspeedsofupto3000000timespersecond.精品文檔放心下載Thirdgenerationcomputerissmallandmediumscaleintegratedcircuitcalculator.In1962,theUnitedStatesTexascompanyandtheUnitedStatesAirForcecooperation,withintegratedcircuitcalculatorofbasicelectroniccomponents,madeaexperimentalprototype.Inthisperiod,calculator,volumepowerconsumptionisfurtherreduced,thereliability精品文檔放心下載.isgreatlyimproved,operationspeedsofupto40000000timespersecond.感謝閱讀Thefourthgenerationofelectroniccalculatorisalarge-scaleintegratedcircuitcalculator.Isgenerallybelievedthatwasstartedin1970.Now,thegiantmachineoperationspeedhasreachedhundredsofmillionsoftimespersecond,inscientificresearchandeconomicmanagementplaysanirreplaceablerole;andtheminiaturemachinemakesthecalculatorofthevolumeandthecostisgreatlyreduced,andpenetratedintotheindustrialproductionanddailylifeeachquoin.Today,tomakeaENIACalsofunctioncalculator,volumeaslongasitsppmisenough.精品文檔放心下載Fifthgenerationcomputerresearchworkhasbeencarriedoutformanyyears,whetheritis"fantasy"ofthesuperconductingcalculator,calculator,calculator,orlightbiologicalartificialintelligentamplifier,havemadecertainprogress.Thisgenerationofcomputerspeedwillreacheverysecondtrilliontimes,cantoalargeextentsimulatinghumanintelligence,andinsomewayssurpasshumanintelligence.謝謝閱讀Theclevermathematiciantoelectroniccalculator,electroniccalculatorwillenablemathematiciansbecomemoreclever.Andtheelectroniccalculatorisnotonlyatool,itandothertoolsarenotthesame:electroniccalculatoristhehumanbrainasideextension.Becausetheelectroniccalculatornotonlyhasspecialcomputingability,speedisunmatched,butalsoiscapableofsimulatingthehumansomethinking感謝閱讀.functions,inaccordancewithcertainrulesforlogicaljudgmentandlogicalreasoning,toreplacethepartialmentallabor.In1976,amathematicianwithelectroniccalculatortoprovethefour-colortheorem,"relyingonthemachinesdidnotabletocompletethethings",hascausedasensationthroughouttheinternationalmathematicalcircles.感謝閱讀Electroniccalculatortothinkmoreeffectivelytotheunknownfield.Justfromthispointofview,itisnotdifficulttorealizeelectroniccalculatorisagreatinventionofscience.精品文檔放心下載1946年2月15日，在美國賓夕法尼亞大學，世界上第一臺電子計算器ENIAC正式投入謝謝閱讀了運行。在隆重的揭幕儀式上，ENIAC表演了它的〃絕招〃：在1秒鐘內(nèi)進行5000次加感謝閱讀法運算；在1秒鐘內(nèi)進行500次乘法運算。這比當時最快的電器計算器的運算速度要抉1000精品文檔放心下載多倍。全場起立歡呼，歡呼科學技術(shù)進入了一個新的歷史發(fā)展時期。精品文檔放心下載然而，從技術(shù)上講，ENIAC尚未正式運行也就幾乎過時了。因為在它正式運行之前，一份感謝閱讀新型電子計算器的設計報告，又在計算器發(fā)展史上樹起了一座新的里程碑！這份設計報告的謝謝閱讀起草人，就是20世紀天才的數(shù)學大師之一、美籍匈牙利數(shù)學家馮．諾伊曼。感謝閱讀1903年12月28日，馮．伊曼誕生于匈牙利的布達佩斯市。他從小就顯示驚人的數(shù)學天賦，謝謝閱讀相傳在6歲時就能心算8位數(shù)學除法，8歲時就掌握了微積分，12歲時竟讀懂了一部高深精品文檔放心下載的數(shù)學著作《函數(shù)論》的大意！后來，馮．諾伊曼在〃匈牙利數(shù)學之父〃費葉爾的指導下，謝謝閱讀接受了嚴格的訓練。18歲時，他與指導老師合作，在國外的雜志上發(fā)表了第一篇數(shù)學論文。感謝閱讀.1926年，馮．諾伊曼幾乎同時畢業(yè)于兩所大學：在蘇黎世高等技術(shù)學院獲得〃化學工程〃精品文檔放心下載文憑；在布達佩斯大學獲得數(shù)學博士證書。1930年，馮．諾伊曼到了美國，被聘為普林斯頓大學的訪問教授。3年之后，年僅30歲感謝閱讀的馮．諾伊曼與大科學家愛因斯坦一道，成為普林斯頓高級研究院的首批常任成員。感謝閱讀與馮．諾伊曼一起工作過的人，一致公認他才智過人。他的老師、著名數(shù)學家波利亞說：〃感謝閱讀馮．諾伊曼是我唯一感到害怕的學生，如果我在講演中列出一道難題，那幺當我講演結(jié)束時，謝謝閱讀他總會拿著一張潦草寫就的紙片說已把難題解出來了?！ㄓ幸淮?，一個數(shù)學家對一個題的5謝謝閱讀種情況分別用手搖計算器算了一個通宵，第二天去請教馮．諾伊曼，結(jié)果他只用7分鐘就感謝閱讀算出了全部的答案，接著，馮．諾伊曼思考了半個小時，又發(fā)現(xiàn)了一種更好的簡捷算法。不精品文檔放心下載過，馮．諾伊曼的妻子卻認為他〃一點幾何頭腦也沒有〃。有一次，她讓馮．諾伊曼去取一謝謝閱讀杯水，馮．諾伊曼在這幢房子里生活了17年，竟弄不清杯子放在什幺地方，他轉(zhuǎn)了半天，精品文檔放心下載又走回來問妻子玻璃杯放在哪里……。對生活瑣事的心不在焉，從另一個側(cè)面反映了他對科感謝閱讀學研究的專注。馮．諾伊曼研究問題時精神高度集中，因而能敏銳地抓住問題的本質(zhì)。謝謝閱讀1940年以前，馮．諾伊曼對數(shù)學的頁獻集中在純粹數(shù)學方面。他曾研究〃算子環(huán)〃領(lǐng)域達感謝閱讀年之久，一直是這個領(lǐng)域內(nèi)無可爭辯的世界權(quán)威；他的另一項輝煌的科學成就，是部分解決了希爾伯特第5問題，為完全解決這著名數(shù)學難題作出了重大貢獻。謝謝閱讀1940年，馮．諾伊曼積極投身于反法西斯戰(zhàn)爭的洪流，開始了由純粹數(shù)學家到杰出應用數(shù)精品文檔放心下載.學家的轉(zhuǎn)變過程。在戰(zhàn)爭年代，他先后被聘為美國海軍兵工局等許多單位的顧問，還直接參精品文檔放心下載與了核武器的研制工作，為設計原子彈的最佳結(jié)構(gòu)提出了許多重要建議。精品文檔放心下載馮．諾伊曼有一個突出的優(yōu)點，就是善于把人們認為不能用數(shù)學處理的實際問題加以公理化、謝謝閱讀系統(tǒng)化，將抽象的數(shù)學理論巧妙地應用于實際生活領(lǐng)域。譬如一次幾十名商人參加的交易會，謝謝閱讀商人們都會謀求有利于自己的最優(yōu)策略，其數(shù)學復雜程度遠遠超過了太陽系行星的運動，精品文檔放心下載馮．諾伊曼敢于知難而進，用一系列的數(shù)學創(chuàng)造揭示這類現(xiàn)象的規(guī)律，從而奠定了對策論這謝謝閱讀門數(shù)學分支的基礎。馮．諾伊曼對計算器科學的貢獻，尤其為人們所贊賞。有趣的是，將他引向這個領(lǐng)域卻純粹感謝閱讀是一個偶然的機會。1944年夏天，馮．諾伊曼在一個火車站候車時，偶然遇見ENIAC研制小組的負責人之一、精品文檔放心下載數(shù)學家格爾斯坦中尉。當時，馮．諾伊曼正為原子彈實驗中遇到的大量計算問題而苦惱，譬感謝閱讀如有關(guān)原子核裂變反應過程問題，需要進行數(shù)十億次初等算術(shù)運算，上百名女計算員用臺式感謝閱讀計算日夜不停地工作，仍然不能按時完成任務。在與格爾斯坦中尉閑聊中馮．諾伊曼聽到了謝謝閱讀ENIAC正在研制的消息，立刻理解了這項工作的深遠意義。不久，他就成了研制小組的常謝謝閱讀客，并對一些關(guān)鍵問題的解決作出了貢獻。那時候，ENIAC的研制工作已經(jīng)接近尾聲，馮．諾伊曼與大一起集中討論了ENIAC的不足謝謝閱讀處。1945年3月，他起草了一份〃離散變量自動電子計算器〃的設計報告，對ENIAC作感謝閱讀了兩項重大的改進。.一項改進是將10進制改為2進制，從而大大簡化了計算器的結(jié)構(gòu)和運算過程；另一項改進謝謝閱讀是將程序與數(shù)據(jù)一起存貯在計算器內(nèi)，使得電子計算器的全部運算成為真正的自動過程。感謝閱讀這份設計報告是計算器結(jié)構(gòu)思想一次最重要的改革，標志著電子計算器時代的真正開始。連感謝閱讀一向?qū)８憷碚摰钠樟炙诡D高級研究院，也破例批準了馮．諾伊曼的研制工作。從此，他那嶄謝謝閱讀新的設計思想，深深地烙記在現(xiàn)代電子計算器的基本設計之中。西方科學家們對馮．諾伊曼謝謝閱讀的工作給予了極高的評價，尊他為〃電子計算器之父〃。謝謝閱讀后來，馮．諾伊曼又進一步研究了自動機理論，他用驚人的毅力克服癌癥帶來的病痛，探索精品文檔放心下載了計算器和人腦機制的類似現(xiàn)象。不幸的是，1957年2月8日，《計算器與人腦》的講搞精品文檔放心下載尚未寫完，馮．諾伊曼便被骨癌奪去了生命。馮．諾伊曼給世界留下了豐富的科學遺產(chǎn)。他是20世紀最多產(chǎn)的科學家之一，在理論物理謝謝閱讀學、經(jīng)濟學、氣象學等許多科學領(lǐng)域，也都留有他辛勤耕耘的足跡。例如他早年撰寫的《量感謝閱讀子力學的數(shù)學基礎》一書，首次將量子力學納入嚴格的數(shù)學系統(tǒng)，至今仍是理論物理學的經(jīng)精品文檔放心下載典著作。專家們指出：〃如果按年代先后去探討馮．諾伊曼的個人志向和學術(shù)成就，那就等謝謝閱讀于探討了過去30年來科學發(fā)展史的概要?！ǖ?956年，全世界已經(jīng)生產(chǎn)了幾千臺大型電子計算機，其中有的運算速度已經(jīng)高達每秒幾精品文檔放心下載萬次。這些電子計算器都以真空管為主要組件，所以叫真空管計算器。利用這一代電子計算精品文檔放心下載器，人們將人造衛(wèi)星送上了天。這是第一代電子計算器。.第二代電子計算器是晶體管計算器。1956年，美國貝爾實驗室用晶體管代替真空管，制成感謝閱讀了世界上第一臺全晶體管管計算器Lepreachaun。它使計算器的體積、重量、耗電都大為精品文檔放心下載減少。至60年代，世界上已產(chǎn)了3萬多臺晶體管計算器，運算速度達到了每秒300萬次。感謝閱讀第三代電子計算器是中小規(guī)模集成電路計算器。1962年，美國得克薩斯公司與美國空軍合精品文檔放心下載作，以集成電路為計算器的基本電子組件，制成了一臺實驗性的樣機。在這時期，計算器的精品文檔放心下載體積、功耗都進一步減少，可靠性卻大為提高，運算速度達到了每秒4000萬次。感謝閱讀第四代電子計算器是大規(guī)模集成電路計算器。一般認為這是1970年開始的事?，F(xiàn)在，巨型謝謝閱讀機的運算速度已達到每秒幾億次，在科學研究和經(jīng)濟管理中起著不可替代的作用；而微型機精品文檔放心下載則使計算器的體積與成本大幅度減少，并滲透到工業(yè)生產(chǎn)和日常生活的各個角落。今天，要精品文檔放心下載制造一臺具有ENIAC同樣功能的計算器，體積只要有它的百萬分之一也就足夠了。精品文檔放心下載第五代電子計算器的研制工作已經(jīng)開展多年了，無論是〃夢幻式〃的超導計算器，還是光計精品文檔放心下載算器、生物計算器、人工智能放大器，都已取得了一定的進展。這一代計算機的速度將達到感謝閱讀每秒萬億次，能在更大程度上仿真人的智能，并在某些方面超過人的智能。感謝閱讀數(shù)學家把聰明給了電子計算器，電子計算器將使數(shù)學家變得更加聰明。而且電子計算器不僅精品文檔放心下載是一種工具，它與其它的工具都不相同：電子計算器是人腦的一個側(cè)面的延伸。因為電子計謝謝閱讀算器不僅具有非凡的計算能力，速度之快令人望塵莫及，而且還能夠仿真人的某些思維功能，精品文檔放心下載按照一定的規(guī)則進行邏輯判和邏輯推理，代替人的部分腦力勞動。1976年，數(shù)學家憑借電精品文檔放心下載.子計算器去證明四色定理，〃依靠機器完成了人沒有能夠完成的事情〃，轟動了整個國際數(shù)感謝閱讀學界。電子計算器把人的思維更加有效地引向未知領(lǐng)域。僅僅從這個角度，也不難認識到電子計算謝謝閱讀器是一項多么偉大的科學發(fā)明了。1excellentcross-platformfeatures精品文檔放心下載Qtsupportsthefollowingoperatingsystem:Windows,Linux,Solaris,Mac,SunOS,youFreeBSD,BSD/OS,SCO,AIX,OS390,QNXetc..2objectoriented感謝閱讀QtgoodencapsulationmechanismmakesQtmodulardegreeishigh,canbereused,forusersdevelopmentisveryconvenient.Qtprovidesamethodcalledsignals/slotsyousignalandslottypeofsecuritytoreplacethecallback,canqueryanddesignattribute,whichmakeseachelementofcollaborativeworkbetweenbecomesverysimple.3richAPIyou感謝閱讀Qtincludesupto500abovetheC++class,alsoforsupplybasedontemplate感謝閱讀Collections,serialization,file,I/Odevice,感謝閱讀Directorymanagement,date/time.Even感謝閱讀Regularexpressionprocessingfunction.謝謝閱讀4largedevelopmentdocument謝謝閱讀.5usercontrolsOtherkitsinapplicationaretheexistenceofauniversalproblem,isoften謝謝閱讀notreallysuitablefortheneedsofthecontrols,thegeneratedcustom謝謝閱讀controlsfortheuser,isablackbox.Forexample,intheMotifmanual感謝閱讀discussesusercustomcontrolproblem.InQt,tocreateacontrol,hasthe謝謝閱讀absoluteadvantage,buildingcustomcontrolsareverysimple,andeasy精品文檔放心下載tomodifythecontrol.6convenienceSinceQtisacrossplatformGUIkit,so,itsprogrammerstoimplicit感謝閱讀Hidinprocessingdifferentwindowsystemwhenthepotentialproblems.InordertobebasedonQtprogram謝謝閱讀Withconvenient,Qtcontainsaseriesofclasses,theclasscanmakeprogrammersavoidinthefile感謝閱讀Treatment,treatmenttimearedependentontheoperatingsystem謝謝閱讀details.7InternationalQtprovidescompletesupportforlocalizationofapplications,alluserinterfacetextorcharacter謝謝閱讀Stringcanusethetranslationtooltotranslateitintoaforeignlanguage.In8,ahighperformancetool感謝閱讀Forthelibrary,itsvaliditymorethanapplication.InordertoimprovetheQtlibrarywith精品文檔放心下載.Thevalidity,efficiency,hascarriedontheoptimization,Qtcanperformsomebasictasks,精品文檔放心下載Forexample,figuretouches,thanthegeneralplatformbasedcodequickly.Qtisbasedon感謝閱讀Xlib,insteadofrelyingontheMotiftoolkit.謝謝閱讀CustomizableappearanceIn9,QtsupportthemeSotheapplicationsoftwarebasedonQtinMac,Windowsexternalappearance謝謝閱讀Viewtopicexchangebetween,andevenchangetherunningtime.TheseapplicationsinXWindow感謝閱讀Next,orintheMicrosoftWindowscanoperateindependently,running.In10,superiordrawingfunction謝謝閱讀QtdrawingtoolsQPainter,inanarbitrarydrawingdevicecanbepolished精品文檔放心下載Graphical.Thedrawingdevicecomprisescomponents,pixelmapping,graphicfileandprinter,phase精品文檔放心下載Thesamecodecanbeusedin4differenttypesofequipment.ClassQPaintersupportcomplex精品文檔放心下載Hybridequivalentsystemconversion,easilyonallplatformstodraw謝謝閱讀rotatedtextandpixelMapping.In11,2D/3Dgraphicsrendering謝謝閱讀QtprovidesaQGLWidgetclass,usethisclasstodraw2D/3Dmap感謝閱讀Shape.UseQGLWidgetasanQtcomponentasconvenient.感謝閱讀ThisispureOpenGLdo3Dgraphicsandbetteruse.謝謝閱讀TheQtpartdiffersfromotheruserstointeractivelyGUIkit.UserinteractionisallGUI(Graphicaluserinterface)applicationissuesofconcern.Throughauserevents(suchaspressthemouse)andtheprogramevent(suchastheexitprocedure)connectionrises,enablestheusertographicalinterfaceusingonlythemousetocontrolprogram.Whileotherkitisusingacallbackfunctionforuserinteraction.感謝閱讀Callbackrefersto:yourowndefinitionofafunction,whenthesystemcallandtellwhy.Youcanwriteaspecificamountandtypeofthefunctionparameters,andthentellthesystemwhenusing,andpassesitrequiredparameters,thesystemwillcallyoudefinedfunction,processingparameters,andtogiveyouthereturnvalue.精品文檔放心下載Thecallbackfunctionistheonlyglobalfunction,orastaticfunction,becauseof謝謝閱讀Forthisfunctiononlyintheclass,soinordertomaintainclass謝謝閱讀Integrity,weuseaclassstaticmemberfunctiontomakethecallback感謝閱讀function.Signal.Whenasignaltoitscustomersorownershipofinternalstateischanged,theletter,感謝閱讀Wasanobjectlaunching.Onlythedefinitionofthesignaloftheclassanditsderivedclassesto精品文檔放心下載Thesignaltransmitter.Whenasignalisemittedwhen,theirassociatedslotswillbemade精品文檔放心下載Momentofexecution,justlikeanormalfunctioncall.Signal/slotmechanismcompletelyindependent感謝閱讀InanyGUIeventloop.Onlywhenallofthegroovebacklateremissionfunction(EMIT)精品文檔放心下載Toreturn.Iftherearemultipleslotandasignalassociated,so,whenthisletter感謝閱讀Numbertobetransmitted,theslotwillbeonebyonetoperform,butthey謝謝閱讀Theorderofexecutionwillberandomanduncertain,wearenotartificially精品文檔放心下載Tospecifywhichisperformedfirst,whichaftertheimplemen