The book of qt 4 the art of building qt applications - phần 3 pptx

... usingthe Designer,which allowsthe basicgraphical frameworkofmostapplications to be puttogether “bymouseclick” in Qt versions 4. 1and later .The basisofthisisthe QMainWindowQt class. 4. 1The Anatomy of ... key. Alternatively,while in thenormaldesignmode,you can setthe name of thede- siredBuddywidgetinthe PropertyEditor, usingthe Buddyproperty. 3 Using this ap- proach,wewould setthe...

Ngày tải lên: 13/08/2014, 08:21

... give you a good idea of the breadth of the Dojo widget set .The widgets are divided into general cate- gories that correspond to the way the widgets are packaged. Most of these widgets have numerous ... on the calendar .The user can flip through the calendar by clicking the back and forward arrows in the upper left and right of the calendar.When the desired date...

Ngày tải lên: 12/08/2014, 16:21

... andProcessing XMLFiles 36 7 13. 2.2Searching for SpecificElements 37 0 13. 2.3Manipulatingthe DOMTree 37 1 13. 2. 4The DOMTreeasXML Output 37 2 11 Daniel Molkentin TheBook of Qt 4 TheArt of BuildingQtApplications ® Munich ... 33 2 11.5.1NameResolutionwithQHostInfo 33 3 11.5.2Using QTcpServer andQTcpSocket 33 3 12 Threading with QThread 337 12.1Using Threads 33 8 12.2Synchr...

Ngày tải lên: 28/04/2014, 16:56

... recycled paper Qt 4 Qt 4 THE ART OF BUILDING Qt APPLICATIONS DANIEL MOLKENTIN THE BOOK of THE BOOK of Qt 4 THE BOOK of THE BOOK of Qt 4 ® MOLKENTIN 1 Basics,Tools, and First Code Several Qt classeshaveQObject ... thechosencategory.Whenthe user changesthe categoryon the 34 Contents 4. 3. 3Integrating theMainWindowwithYourSourceCode 11...

Ngày tải lên: 13/08/2014, 08:21

... now ByteConverterDialog decEdit textChanged() setText() hexEdit textChanged() setText() binEdit textChanged() setText() decChanged() hexChanged() binChanged() We can connect thesignals andslots of theline-edit widgets from theByteCon- verterDialog to thesignals andslots of theByteConverter class, for example, the hexChanged()signalofthe decEdit object ... implements both thegraphical in...

Ngày tải lên: 13/08/2014, 08:21

... ClickSplitterHandle::mouseDoubleClickEvent()wefirstdetermine thealignment of thesplitter.Weobtainthe positionofthe splitter,using theQSplitter::indexOf() method. This is also thepositionofthe widgetlyingtothe rightof(or directly beneath) thesplitter. Forreasons ... as the rstargu- ment,thenthe dialog willnot be modal .The nexttwoargumentsare thedialog heading andthe startdirectory. TheQDir...

Ngày tải lên: 13/08/2014, 08:21

... query.Thisisfollowed bythelistofstrings to be displayed.Then comesthe indexof thelistele ment that thedrop-downwidgetdisplaysatthe be- ginning .The next-to-lastparameter specifies whether theusercan add ... HTML) Qt: :SizeHintRole Sizehintfor theelement;isforwardedtothe views(QSizeHint) Qt: :FontRole Font type for renderingthe DisplayRole Qt: :TextAlignmentRole Alignment of thetextofthe...

Ngày tải lên: 13/08/2014, 08:21

... weconstruct thedescription of theaddressbook entryusingthe <table>tag. Each rowof thetable consists of twocells,one of which contains thenameofthe address book field (the key)and theother ,the matching ... addi- tion to theissueofdistinguishabilityduring thedropprocedure. Theother side of th edrag-and-drop procedureishandled bythedropMimeData() method. Apartfromthe MIME data,...

Ngày tải lên: 13/08/2014, 08:21

... nowconnect theclicked()signalofthe Screenshot!buttontothe slot that prepares thescreenshot,and thesignalofthe Printbuttontothe slot that enables theconfiguration of theprintingparameters. Then wecallgrabDesktop(), ... combinebothvalueswitheach other. If such an opera- torisset, this changesthe compositionmode in theQPainter. Forthistofunction ,the QImage mustuse theFormat_ARGB32_Premultipli...

Ngày tải lên: 13/08/2014, 08:21

... QStringobjects, making useofthe toLocal8Bit()method internally. 11.4Startingand ControllingProcesses Nowandagainyou maywanttomake useofthe services of command-linebased programs, particularlyon Unix-based operating ... { produceMessage(); msleep((rand() %30 00)+1); } ; } } ; In thecritical sectionwecheck whether thereisstill room in thequeue.Ifthisis notthe case, thewaitcondition comesintof...

Ngày tải lên: 13/08/2014, 08:21