The book of qt 4 the art of building qt applications - phần 7 pot

... nowconnect theclicked()signalofthe Screenshot!buttontothe slot that prepares thescreenshot,and thesignalofthe Printbuttontothe slot that enables theconfiguration 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 pla...

Ngày tải lên: 13/08/2014, 08:21

... exploration of the Dojo widgets.We continue in the next section of the book by exploring some of the nonvisual elements of Dojo, the features that 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 Cha...

Ngày tải lên: 12/08/2014, 16:21

... 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...

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 ... forother objects. It’s akindofeventinterceptor.Chapter 7provides more details of events. 35 Daniel Molkentin TheBook of Qt...

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

... usingthe Designer,which allowsthe basicgraphical frameworkofmostapplications to be puttogether “bymouseclick” in Qt versions 4. 1and later .The basisofthisisthe QMainWindowQt class. 4. 1The Anatomy of ... theirtoolswithinthe main window.Ascan be seen in theexampleofthe Designer in Figure 4. 11, theusercan dock them in thesamewayas toolbars to side areasofthe window,orposition them flo...

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 ... instantiatethe classvia theconstructor,thenQtdisplays aseparatedialog. If you usethe predefinedstaticmethods,onthe otherhand, whi...

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 ... andsee whathappensto it. Figure 7. 3: The DragLabel with theQt-4logo 7 .4. 3The Drop Side So that wecan better understandthe drag-and-drop processillustrated in Figure 7. 2onpage 19...

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 ... QModelIndex&parent)const { Q_UNUSED(parent); returnaddressBook.at(0).count(); } Viewsthatuse ouraddressbook modelcan discover thelabelingofthe rowsand columns via thehead...

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 ... and usethese to read datainthe orderinwhich theywerereadinbyoperator<<(). Then wefill therespectivepropertyof thepasseddataset instance usingthe corre- sponding setmetho...

Ngày tải lên: 13/08/2014, 08:21