sourcepcanywhere

pcanywhere  时间:2021-04-03  阅读:()
G.
Salvendy,M.
J.
Smith(Eds.
):HumanInterface,PartII,HCII2011,LNCS6772,pp.
305–314,2011.
Springer-VerlagBerlinHeidelberg2011DodgingWindowInterferencetoFreelyShareAnyOff-the-ShelfApplicationamongMultipleUsersinCo-locatedCollaborationShinichiroSakamoto,MakotoNakashima,andTetsuroItoDepartmentofComputerScienceandIntelligentSystems,OitaUniversity700Dannoharu,Oita-shi,Oita-ken,870-1192,Japan{v0753035,nakasima,ito}@oita-u.
ac.
jpAbstract.
Amethodofdodgingwindowinterferenceisdescribedforallowingmultipleuserstofreelyshareanyoff-the-shelfsingle-userapplicationinco-locatedcollaborationutilizingashareddevice.
Thismethodisindispensablefortransparentlyrealizingapplicationsharinginlighteffortwithacentralizedarchitecturebyusingasurrogatewindowwhichisamimicoftheoriginalapplication'swindow.
Althoughtheoriginalapplicationshouldprocessanyeventonthesurrogatewindow,windowinterferencecouldbecausedbyoverlappingthelocationofaneventwiththesurrogatewindowandthentheeventcannotbeprocessed.
Toavoidwindowinterferenceweformulatethemethodbasedonquadrant-basedwindowpositioning,inwhichtheoriginalapplication'swindowisdynamicallyrepositionedfordisplayingonlyonequadrantofthiswindowinonecornerofthescreenarea.
Theavailabilityoftheproposedmethodwascertifiedandtheusabilitywasclarifiedinco-locatedcollaborationinauniversitylaboratory.
Keywords:Dodgingwindowinterference,windowpositioning,collaboration,applicationsharing,CSCW,centralizedarchitecture,screen-sharingsystem.
1IntroductionManywaysofsharinganyoff-the-shelfsingle-userapplicationamongmultipleusersarewelldocumentedforcomputer-supportedcooperativework(CSCW).
Acentralizedarchitectureisemployedinmostavailablescreen-sharingsystems(e.
g.
,[5]and[7]).
Theapplicationsharingisachievedbycentralizinganoriginaloff-the-shelfsingle-userapplication(an'originalapplication'inshort)andeventoccurrencesontoonePC,andbycopyingthewindowimageoftheoriginalapplicationoneachuser'sPC.
Thisarchitecturecantransparentlyrealizeapplicationsharingindistributedcollaborationwithnospecificeffort,i.
e.
,withoutchangingthesourcecodeoftheoriginalapplicationforreplicatingit.
However,theutilizationofthisarchitectureinco-locatedcollaboration,wheremultipleusersgatheraroundashareddevice,e.
g.
,atabletopdisplay,hasnotbeenstudiedindepth.
Acentralizedarchitecturehasthebenefitofsupportingco-locatedcollaborationbyallowingeachusertoutilizetheoriginalapplicationviaitssurrogatewindowin306S.
Sakamoto,M.
Nakashima,andT.
Itohis/herpreferredlocationandorientation[1].
Here,eachofthesurrogatewindowsworksasamimicoftheoriginalapplication'swindow(an'originalwindow'inshort)whiledisplayingitscopiedwindowimage.
Eachuserinitiatesanyevent,suchasclickingamousebutton,draggingamouse,pressingakey,etc.
,onhis/herownsurrogatewindow,notontheoriginalwindow.
Theoriginalwindowshould,however,beonthetopofotherwindowsinordertoreceiveeveryeventonitssurrogatewindow.
Theeventsonthesurrogatewindowaretheninterferedwithbytheoriginaltopwindow.
Inordertofreelysharetheoriginalapplicationamongmultipleuserswithoutcausingsuchinterference,itiscrucialthattheoriginalwindowisrepositionedtoanappropriateplaceonthescreenareaaccordingtothelocationoftheevent.
Weproposeanovelmethodofdodgingwindowinterferencetofreelyshareanyoff-the-shelfsingle-userapplicationamongmultipleusersinco-locatedcollaboration.
Thismethoddynamicallyrepositionstheoriginalwindowsothatthiswindowdodgestheinterferencewithitssurrogatewindows,allowingtheoriginalapplicationtoreceivetheeventsonthesurrogatewindowsatanygiventime.
Toachievethis,themethodrealizesquadrant-basedwindowrepositioningwhichdrawsonlyonequadrantoftheoriginalwindowamongfourquadrantsincludingthecorrespondinglocationoftheeventontheoriginalwindowastheircommonorigin.
Sincetheoriginalwindowhasasquareshape,itenablesustoprovethatatleastonequadrantexiststherebyavoidingwindowinterferenceeveniftheeventoccursatanylocationonanysurrogatewindowwhenthesizeoftheoriginalwindowissmallerthanthatofthescreenarea.
Itisalsopossibletominimizetheeffortrequiredtorepositiontheoriginalwindowcausedbythelatereventswhenthedisplayedquadrantisfarawayfromtheeventlocationonthescreenareatoavoidwindowinterference.
Therestofthispaperisorganizedasfollows:Theproblemsofpreviousapplication-sharingsystemsinco-locatedcollaborationarediscussedinSection2.
Therequirementsandthequadrant-basedwindowrepositioningoftheproposedmethodaredescribedinSection3.
WeestimatedtheavailabilityofourmethodinSection4andclarifiedtheusabilityofthemethodinco-locatedcollaborativeworkinSection5,whereweimplementedourmethodintoanapplication-sharingsystem,CollaboTray[1]employingacentralizedarchitecture.
2ApplicationSharinginCollaborationThissectiondescribespreviousscreen-sharingsystemsandanadvancedapplication-sharingsystembasedonacentralizedarchitecture.
Wealsodiscusstheproblemstheyhaveinco-locatedcollaboration.
2.
1Application-SharingSystemsForapplicationsharing,screen-sharingsystemshavebeenusedinpracticeforalmosttwentyyears,e.
g.
,PCAnyWhere[7],NX[4],andVNC[5].
Amongthemtheopen-sourcescreen-sharingsystemVNCisutilizedinmanysystemsforapplicationsharing(e.
g.
[2],[8],and[9]).
Thosesystemscanallowtheuserstoshareanyoff-the-shelfapplicationviaitsoriginalwindowandsurrogatewindowswithoutsharingthewholescreenononePC.
AVNC-basedtoolkitforwindowmanagingonX-windowsystem,DodgingWindowInterferencetoFreelyShareAnyOff-the-ShelfApplication307Ametista[6],allowsausertorotatethewindowimageastheusersneedinco-locatedcollaboration[3].
ThoseVNCsystems,however,haveaproblemthattheusersofthesurrogatewindowsarenotabletoinitiateanyeventastheuseroftheoriginalwindowisoperatingtheoriginalapplication.
Anapplication-sharingsystem,CollaboTray[1],candealwiththeaboveproblembymakingeachoftheusersutilizethesurrogatewindowwhileitsoriginalwindowismadeinvisibletodisallowuseofitbyanyuser.
ACollaboTraycentralizesanoriginalapplicationononlyonePCanddecouplesthedrawingofthesurrogatewindowofanorignalwindowfromtheprocessingofanyeventonthesurrogatewindow.
AnyoriginalCollaboTray,whichisloadedwithanoriginalapplication,canyielditscloneCollaboTrayseachofwhichmanagesinherentlythesamesurrogatewindowastheoriginalCollaboTray.
TheCollaboTrayusestheoriginalwindowinadifferentwayfromthepreviousscreen-sharingsystemsandhasadvantageofallowingtheuserstosharetheoriginalapplicationinanyorientationandtime.
Figure1illustratesthebasicapproachofrealizingapplicationsharinginco-locatedcollaborationwithacentralizedarchitecture,whereanoriginalwindowanditstwosurrogatewindowsAandBexist.
InutilizationofVNC,ifownershipoftheoriginalwindowisdisallowedbyanyuserlikeCollaboTrays,theuserscaninitiateanyeventbytakingturnsamongthemselveswhenutilizingtheoriginalapplicationviatheirsurrogatewindows.
However,acommonproblemarisesinapplicationsharingbyVNCandCollaboTrayswhentheoriginalwindowoverlapswithitssurrogatewindowsasshowninthefigure.
Eveniftheoriginalwindowisinvisible,theoriginalwindowneedstobeontopofthesurrogatewindowstoreceiveanyeventonthem.
Theproblemisthatthesurrogatewindowownedbyausershouldalsobeontopoftheoriginalwindowtoallowhim/hertooperatetheoriginalapplication.
Thiscontradictioncauseswindowinterferencebetweentheoriginalwindowanditssurrogatewindow.
Notethateachofthesurrogatewindowsdonotinterferewitheachothersinceneitherisrequiredtobeontopoftheothersurrogatewindowwhenitsuserinitiatesanyevent.
ThecorrespondinglocationoftheeventSurrogatewindowAScreenareaSurrogatewindowBThelocationofaneventOriginalwindowFig.
1.
Applicationsharinginco-locatedcollaboration2.
2WindowInterferenceinCo-locatedCollaborationThetwocasesofwindowinterferenceareillustratedinFig.
1.
Inthefigure,thelocationofeacheventonthesurrogatewindowsisrepresentedbyafilledcircularor308S.
Sakamoto,M.
Nakashima,andT.
Itotriangularshapedmark.
Theunfilledonescorrespondtothelocationoftheeventontheoriginalwindow.
ForsurrogatewindowA,theareaincludingthecorrespondinglocationoftheeventontheoriginalwindowisoverlappedwiththissurrogatewindow.
WhentheuserinitiatestheeventonthesurrogatewindowA,theoriginalwindowisinterferedwithbysurrogatewindowAastheuserisinitiatinganeventonthesurrogate,theoriginalwindowisunabletogetonthetop,andthustheeventcannotbesenttotheoriginalapplication.
Conversely,forthesurrogatewindowB,theareathatincludesthelocationoftheeventonthissurrogatewindowisoverlappedwiththeoriginalwindow.
Whentheeventissenttotheoriginalapplication,theoriginalwindowgetsontopofsurrogatewindowBandthustheuserofsurrogatewindowBcannotinitiatehis/hernextevent.
Inadditiontotheabove,thereisanotherconcernaboutthefeatureofthemousemoving.
IfauserusesastandardUSBmouse,thelocationofthemousecursoronthescreenareaisupdatedevery8msec.
Foranyevent,thelocationofthenexteventmayjumptotheplaceontheoriginalwindowcausingthekindofinterferenceseeninsurrogatewindowBinFig.
1.
Thiscanoccureveniftheoriginalwindowisplacedwhereitcanavoidwindowinterference.
3DodgingWindowInterferenceThissectiondescribesthemethodofdodgingwindowinterferencebyusingquadrant-basedwindowrepositioning.
Wefirstspecifytherequirementstoavoidwindowinterferenceandthenformulatethemethodtomeettheserequirements.
3.
1RequirementsTherearetworequirementstoavoidthewindowinterferencementionedinSection2.
2:(a)toavoidthephysicaloverlappingbetweentheoriginalwindowanditssurrogatewindowtoalloweachothertogetontopifneeded,and(b)toavoidwindowinterferencebyanyfastmovementofthemousecursor.
Theformerleadsthefollowingconditionstobesatisfied:Ca1:Thecorrespondinglocationoftheeventontheoriginalwindowisoutsideitssurrogatewindowonwhichtheeventoccurs.
Ca2:Thelocationoftheeventonasurrogatewindowisoutsideitsoriginalwindow.
Thelatterrequirementispossiblyavoidedbysatisfyingthefollowingcondition:Cb:Theoriginalwindowstaysasfarawayfromthelocationofaneventonitssurrogatewindowaspossible.
ConditionsCa1andCa2leadustounderstandthatonlythesmallestpossibleareaoftheoriginalwindowhastobedisplayed,whichincludesthecorrespondinglocationoftheevent.
ForconditionCb,sincethescreenareahasasquareshape,oneofthefourcornersofthescreenareaisthefurthestfromthelocationofanyevent.
Giventhesefacts,wedeviseawayofquadrant-basedwindowrepositioning,whichselectsaquadrantoftheoriginalwindowwiththecorrespondinglocationoftheeventasitsDodgingWindowInterferencetoFreelyShareAnyOff-the-ShelfApplication309origin,anddisplaythisquadrantonthecornerofthescreenarea,thussatisfyingtheaboveconditions.
3.
2Quadrant-BasedWindowPositioningFig.
2showsanexampleofdodgingwindowinterferenceforthecaseofsurrogatewindowAinFigure1,inwhichtheoriginalwindowisrepositionedtothetoprightcornerofthescreenarea.
Onlythethirdquadrant,i.
e.
,Q3,oftheoriginalwindowisselectedtobedisplayedwithlowopacityonthescreenarea,wherefourquadrantsincludingthecorrespondinglocationoftheeventastheircommonoriginexist.
Wheneachofthetwoquadrants,Q2andQ4,isselected,theoriginalwindowcanberepositionedtothebottomrightandthetopleftcorners,respectively,asshowninthedashedsquareinthefigure.
Theoriginalwindowis,however,thefurthestfromthelocationoftheeventwhenQ3isselected.
SelectingQ3satisfiesCa1,Ca2,andCb.
IfQ1isselected,theoriginalwindowisrepositionedtothebottomleftcornerofthescreenareabutconditionCa2isnotsatisfied.
OriginalwindowSurrogatewindowAScreenareaOriginalwindowOriginalwindowSLSRSBSTOriginalwindowQ1Q4WLWRWBWTQ2Q3Fig.
2.
DodgingwindowinterferenceWeherecallaquadrantQi(i=1,2,3,4)oftheoriginalwindowanavailablequadrantif,QicanbedisplayedsoastosatisfyconditionsCa1andCa2bypositioningitsoriginonthecornerofthescreenareaintheoppositedirectionofQi.
Theoverallprocessofdodgingwindowinterferencebetweentheoriginalanditssurrogatewindowissummarizedasfollows:Step1:Dividetheoriginalwindowintofourquadrantswiththecorrespondinglocationoftheeventastheircommonorigin.
Step2:Findallavailablequadrantsfromthosefourquadrants.
Step3:SelectonequadrantQifromamongtheabovequadrants,whichsatisfiesconditionCb.
Step4:RepositiontheoriginalwindowsoastoonlydisplayQionthescreenarea.
Iftheaboveprocesscanfindanavailablequadrant,wecansaythattheoriginalwindowcanavoidwindowinterferencewithitssurrogatewindow.
Althoughthe310S.
Sakamoto,M.
Nakashima,andT.
Itoavailablequadrantcanbeoverlappedwiththesurrogatewindowinstep4,theutilizationofthesurrogatewindowdosenotinterferewiththequadrantbymakingitinvisible.
Letusprovetherobustnessoftheaboveprocessinfindingavailablequadrants.
AsshowninFig.
2,letWL,WR,WTandWBdenotethedistanceofthecorrespondinglocationoftheeventontheoriginalwindowfromtheleft,right,topandbottomedgesofthewindow,respectively.
AlsoletSL,SR,STandSBdenotethedistanceofthelocationoftheeventonthesurrogatewindowfromtheleft,right,topandbottomedgesofthescreenarea,respectively.
Supposethatboththesizeoftheoriginalandsurrogatewindowsaresmallerthanthescreenareainwidthandinheight,i.
e.
,WL+WRpcanywhere.
shtml8.
Tee,K.
,Greenberg,S.
,Gutwin,C.
:Artifactawarenessthroughscreensharingfordistributedgroups.
InternationalJournalofHuman-ComputerStudies67,677–702(2009)9.
UltraVNC,http://www.
uvnc.
com:8080/

优林70/月,西南高防地区最低70/月

优林怎么样?优林好不好?优林 是一家国人VPS主机商,成立于2016年,主营国内外服务器产品。云服务器基于hyper-v和kvm虚拟架构,国内速度还不错。今天优林给我们带来促销的是国内西南地区高防云服务器!全部是独享带宽!续费同价!官方网站:https://www.idc857.com​地区CPU内存硬盘流量带宽防御价格购买地址德阳高防4核4g50G无限流量10M100G70元/月点击购买德阳高防...

提速啦(69元起)香港大带宽CN2+BGP独享云服务器

香港大带宽服务器香港大带宽云服务器目前市场上可以选择的商家十分少,这次给大家推荐的是我们的老便宜提速啦的香港大带宽云服务器,默认通用BGP线路(即CN2+BGP)是由三网直连线路 中国电信骨干网以及HGC、NTT、PCCW等国际线路混合而成的高品质带宽(精品带宽)线路,可有效覆盖全球200多个国家和地区。(适用于绝大部分应用场景,适合国内外访客访问,域名无需备案)提速啦官网链接:点击进入香港Cer...

PIGYUN:美国联通CUVIPCUVIP限时cuvip、AS9929、GIA/韩国CN2机房限时六折

pigyun怎么样?PIGYunData成立于2019年,2021是PIGYun为用户提供稳定服务的第三年,目前商家提供香港CN2线路、韩国cn2线路、美西CUVIP-9929、GIA等线路优质VPS,基于KVM虚拟架构,商家采用魔方云平台,所有的配置都可以弹性选择,目前商家推出了七月优惠,韩国和美国所有线路都有相应的促销,六折至八折,性价比不错。点击进入:PIGYun官方网站地址PIGYUN优惠...

pcanywhere为你推荐
百度关键词分析如何正确分析关键词?www.kk4kk.com猪猪影院www.mlzz.com 最新电影收费吗?www.kknnn.com求有颜色的网站!要免费的partnersonlinecashfiesta 该怎么使用啊~~javlibrary.com大家有没有在线图书馆WWW。QUESTIA。COM的免费帐号关键词分析怎么样分析关键词?175qq.comhttp://www.qq10008.com/这个网页是真的吗?鹤城勿扰非诚勿扰 怀化小伙 杨荣是哪一期本冈一郎本冈一郎有副作用吗?主要有什么呢?铂金血痕花开易见落难寻,阶前愁杀葬花人;独把花锄偷洒泪,洒上空枝见血痕。是什么意思
高防服务器租用 vps是什么 什么是域名地址 安云加速器 z.com 申请个人网页 阿里云浏览器 双拼域名 web服务器的架设 刀片式服务器 最好的qq空间 鲁诺 免费网页空间 闪讯官网 视频服务器是什么 免费的asp空间 主机管理系统 网页加速 umax rewritecond 更多