The book of qt 4 the art of building qt applications - phần 7 pot
The book of qt 4 the art of building qt applications - phần 7 pot
... nowconnect theclicked()signalofthe Screenshot!buttontothe slot thatprepares thescreenshot,and thesignalofthe Printbuttontothe slot that enablestheconfiguration of theprintingparameters. Then wecallgrabDesktop(), ... determine the diameter via pieRect(). So that the gradient later “creases” the edge of the pie chart circle, thus creating the impression of spatial depth, we place the focus to the edge of the upper ... system,but thepoint at thecenter of thesquare, wefirstmovethecenter of oursquaretothe zeropoint of ourcoordinate system.Thenwerotatethematrixandmovethe point back to it soriginallocat ion.We then...
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Dojo Using the Dojo JavaScript Library to Build Ajax Applications phần 7 potx
... exploration of the Dojo widgets.We continue in the nextsection of the book by exploring some of the nonvisual elements of Dojo, the featuresthat augment JavaScript programming.These are the hidden ... conventions:n The first part is always dojo.n The second part is the module name.n The third part is the function, constructor, or sub-module name.2 04 Chapter 11 Technical Description of Dojo11.2 ... with a multi-part convention .The first part of the name is always dojo.Thisdesignates that the function is part of Dojo and not a custom function created by you ora function from another class...
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molkentin-the book of qt 4-the art of building qt applications
... Applikationsentwicklung.English] The book of Qt4 : the art of building Qtapplications/byDaniel Molkentin 1st ed.p. cm.Includesindex.ISBN-13 97 8-1 -5 932 7- 1 47 -3 ISBN-10 1-5 932 7- 1 47 -6 1 .Qt( Electronic resource)2.Graphicaluserinterfaces(Computersystems) ... andProcessing XMLFiles 3 67 13.2.2Searching for SpecificElements 370 13.2.3Manipulatingthe DOMTree 371 13.2. 4The DOMTreeasXML Output 372 11Daniel MolkentinTheBook of Qt 4 TheArt of BuildingQtApplications®Munich ... EventHandlers 186 7. 2.2Using theGeneral EventHandler 189 7. 3Using EventFilters 190 7. 4Dragand Drop 1 94 7 .4. 1MIMETypes 1 94 7 .4. 2The Drag Side 196 7 .4. 3The Drop Side. 198 7. 5The Clipboard 2018Displaying...
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The book of qt 4 the art of building qt applications - phần 1 ppt
... 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 ®MOLKENTIN1 Basics,Tools, and First CodeSeveral Qt classeshaveQObject ... forother objects.It’s akindofeventinterceptor.Chapter 7provides more details of events.35Daniel MolkentinTheBook of Qt 4 TheArt of BuildingQtApplications®Munich SanFranciscoContents10 TheGraphicsLibrary ... thechosencategory.Whenthe user changesthe categoryon the 34 Contents 4. 3.3Integrating theMainWindowwithYourSourceCode 110 4. 4Making theMostofthe Status Bar 118 4. 4.1TemporaryMessages 120 4. 4.2NormalMessages. 120 4. 4.3Permanent...
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The book of qt 4 the art of building qt applications - phần 2 docx
... nowByteConverterDialogdecEdittextChanged()setText()hexEdittextChanged()setText()binEdittextChanged()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 interfaceand theprocessing logicfor theap-plication: If theuserchanges thevalue in oneofthe line-edit widgets ,the Byte-ConverterDialog classcalls thecorresponding ... enter them in theIndextaboftheAssistant. From thestart page you can also accessalistofall classesand alistgroupedaccordingtotopics.20ForQt4.1,see http://doc.trolltech.com /4. 1/.592 TheToolsNeeded...
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The book of qt 4 the art of building qt applications - phần 3 pptx
... usingthe Designer,which allowsthe basicgraphicalframeworkofmostapplications to be puttogether “bymouseclick” in Qt versions 4. 1and later .The basisofthisisthe QMainWindowQt class. 4. 1The Anatomy of ... theirtoolswithinthe mainwindow.Ascan be seen in theexampleofthe Designer in Figure 4. 11, theusercandock them in thesamewayas toolbars to side areasofthe window,orpositionthem floatingover themainwindow.Iftheyaredocked, ... Delphi who startonQt/C++developmentfindthesignal/slot conceptunusual, andtheymiss theeventhandler .Qt4 allowsthemto sticktothe semanticstheyareusedto, permitting slot declarationsofthe formvoid...
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The book of qt 4 the art of building qt applications - phần 4 pot
... ClickSplitterHandle::mouseDoubleClickEvent()wefirstdetermine thealignment of thesplitter.Weobtainthe positionofthe splitter,using theQSplitter::indexOf()method. This is also thepositionofthe widgetlyingtothe rightof(or directlybeneath) thesplitter.Forreasons ... instantiatethe classvia theconstructor,thenQtdisplaysaseparatedialog. If you usethe predefinedstaticmethods,onthe otherhand,which cover most needsofapplicationdevelopers, then Qt triestouse the ledialog ... weleaveitoutbyspecifyingQMessageBox::NoButton.Thestatuscode returned byQMessageBox::question() corresponds to thevalue of thebuttonchosenbytheuser. To checkwhether theuserhas answered theques-tion withYes,wecomparethe return...
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The book of qt 4 the art of building qt applications - phần 5 pptx
... query.Thisisfollowed bythelistofstrings to be displayed.Thencomesthe indexof thelistele ment that thedrop-downwidgetdisplaysatthe be-ginning .The next-to-lastparameter specifies whether theusercan add ... andsee whathappenstoit.Figure 7. 3: The DragLabel withtheQt-4logo 7 .4. 3The Drop SideSo that wecan better understandthe drag-and-drop processillustrated in Figure 7. 2onpage 196, wewillnowimplementalabelwidgetcomplementaryto ... andisdescribedinRFCs2 045 , 2 046 ,and2 0 47 .1 94 6.5 Ready-made DialogsinQt6.5.4Input DialogsForsimplequeries,Qtprovides various template inputdialogs,consistingofasuit-able inputwidgetand twobuttons,OKand Cancel.The...
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The book of qt 4 the art of building qt applications - phần 6 doc
... weconstruct thedescription of theaddressbook entryusingthe <table>tag. Each rowof thetable consists of twocells,one of which contains thenameofthe address book field (the key)andtheother ,the matching ... QModelIndex&parent)const{Q_UNUSED(parent);returnaddressBook.at(0).count();}Viewsthatuse ouraddressbook modelcan discover thelabelingofthe rowsandcolumns via theheaderData()method. To do so,theymustspecifythenumericpositionofthe section of ... “Interview”Q_UNUSED(parent);returnaddressBook.count() -2 ;}To determine thenumber of columns,welook at thedataset from th efirstlineoftheCSV file. TheQStringList::cou nt() method is used to determine thenumber of stringsinthe string...
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The book of qt 4 the art of building qt applications - phần 8 doc
... QStringobjects,making useofthe toLocal8Bit()method internally.11.4Startingand ControllingProcessesNowandagainyou maywanttomake useofthe services of command-linebasedprograms, particularlyon Unix-based operating ... andusethese to read datainthe orderinwhich theywerereadinbyoperator<<().Then wefill therespectivepropertyof thepasseddataset instance usingthe corre-sponding setmethod. Finallywepassonthe ... {produceMessage();msleep((rand()%3000)+1);} ;}} ;In thecritical sectionwecheck whether thereisstill room in thequeue.Ifthisisnotthe case, thewaitcondition comesintoforce .Since themutexmustnot beblockedduringthe waiting period,...
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