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 ... “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 ... 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...

... clear of the zebra.1 The book appeared finished at the end of the previous step, but there was some awkwardness about the frame. It lines up too tightly with the belly of the zebra, and there’s ... by the position of his or her name on the cover of the books. If it goes above the title, they’ve made it.There are other criteria as well, of course. Gold blocking, especially if the ... were the descenders of the ‘y’ and ‘f’ – and the ‘e’ of the first The needs to run into the ‘H’ of ‘History’. We can clean up all these points by erasing them on a layer mask.%Adding the...

... 108 6 Contents6Dialogs 161 6. 1Modal Dialogs 161 6. 2Non-modal Dialogs 163 6. 2.1UsabilityProblems 163 6. 3Semi-modal Dialogs 1 64 6. 4Avoiding Bloated Dialogs 1 64 6. 5Ready-made DialogsinQt 166 6. 5.1Message Dialogs 166 6. 5.2Error ... theMainWindowwithYourSourceCode 110 4. 4Making theMostofthe Status Bar 118 4. 4.1TemporaryMessages 120 4. 4.2NormalMessages. 120 4. 4.3Permanent Messages. 121 4. 5Toolbars 125 4. 6HowDo ActionsWork? 1 26 4. 6. 1Howto InstantiateQAction ... Applikationsentwicklung.English] The book of Qt4 : the art of building Qtapplications/byDaniel Molkentin 1st ed.p. cm.Includesindex.ISBN-1397 8-1 -5 932 7- 147 -3 ISBN-10 1-5 932 7- 147 -6 1 .Qt( Electronic resource)2.Graphicaluserinterfaces(Computersystems)...

... 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 ... 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 ... andOther Classesnot Derived from QObject 40 1 .4. 3The Qt InheritanceHierarchy 41 1.5QtataGlance 42 1.5. 1The Qt Libraries 42 1.5.2Toolsand Utilities 47 1.5.3Examples andDemos 581.6Howto Use theDocumentation...

... 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 ... andOpenGLmodules;anddetaileddescriptionsofthe toolsand utilities.Figure 1.18:TheclassdocumentationoftheQWidget classTheclass documentationiswhatismostfrequentlyused in day-to-dayworkwith Qt. If you knowtheclass names, ... enter them in theIndextaboftheAssistant. From thestart page you can also accessalistofall classesand alistgroupedaccordingtotopics.20ForQt4.1,see http:/ /doc. trolltech.com /4. 1/.592 TheToolsNeeded...

... areasofthe window,orpositionthem floatingover themainwindow.Iftheyaredocked, thelatter haveasplitter(see Chapter 5.3onpage 150), withwhich theusercan fine-tune thesizeratio of thedockwindowto themainwindow,ifnecessary.Dockwindowsalsohaveahandle ... usingthe Designer,which allowsthe basicgraphicalframeworkofmostapplications to be puttogether “bymouseclick” in Qt versions 4. 1and later .The basisofthisisthe QMainWindowQt class. 4. 1The Anatomy of ... DockWidgetAreasenumeratorisusedtospecifythelocation,and is describedinTable 4. 3.Table4.3: The DockWidgetAreasenumeratorValue Position Qt: :LeftDockWidgetArea Vertically,onthe left side of themainwin-dow,but to theright of anypossible...

... ClickSplitterHandle::mouseDoubleClickEvent()wefirstdetermine thealignment of thesplitter.Weobtainthe positionofthe splitter,using theQSplitter::indexOf()method. This is also thepositionofthe widgetlyingtothe rightof(or directlybeneath) thesplitter.Forreasons ... SLOT(showExtension(bool)));dlg.exec();returnapp.exec();}Abuttonwiththe inscriptionExpand/Collapseallowsthe user to folddownalabelwiththe inscriptionExtension (Figure6.3). Theextension itself is aQWidgetinQt4, 165 6. 5 Ready-made DialogsinQt 6. 5.3File ... howtheycanbeimplemented withQt. 6. 1ModalDialogsSome dialogs remain in theforeground until theusercompletes hisinteractionwiththem, andthe rest of theapplicationisblo ckeduntil thedialogwindowis 161 4. 7 Dock Windowswejustneed...

... query.Thisisfollowed bythelistofstrings to be displayed.Thencomesthe indexof thelistele ment that thedrop-downwidgetdisplaysatthe be-ginning .The next-to-lastparameter specifies whether theusercan add ... andisdescribedinRFCs2 045 , 2 0 46 ,and2 047 .1 94 6. 5 Ready-made DialogsinQt 6. 5.4Input DialogsForsimplequeries,Qtprovides various template inputdialogs,consistingofasuit-able inputwidgetand twobuttons,OKand Cancel .The ... HTML) Qt: :SizeHintRole Sizehintfor theelement;isforwardedtotheviews(QSizeHint) Qt: :FontRole Font type for renderingthe DisplayRole Qt: :TextAlignmentRole Alignment of thetextofthe DisplayRole Qt: :BackgroundColorRoleBackground...