the art of distributed applications

... welcome—challenge for the Trolltech team of developers each day The most difficult part of Qt to get right, and also the most visible, is the graphical user interface (GUI) The foundation for any GUI is the technology ... it could achieve.The two of them came up with the goods! The breakthrough success was due to the fantastic scan-line converter from the FreeType project, a piece of opensource software that is ... Structure of the Book The book first explains the basic structure of the Qt toolkit, together with its mostimportant specific properties The subsequent chapters concentrate on writing yourown small applications

Ngày tải lên: 13/08/2014, 08:21

... can seehowthelayouts react to changesinsize, testthe widgets,and seewhether the signal/slotconnections havethe desiredeffects. TheDesigneralsohas amode that specifies the tabsequence of thewidgets;that ... in the.profile.For example, thefollowinglineinthe .pro fileadds thedescription of thedialogfrommydialog.ui to theproject: FORMS +=mydialog.ui qmakethencreates acorresponding rule that generates theC++ ... from mydialog.ui,using uic. Thelatter contains theinterfacedescription of the code that implements thedialog. (Weexplainthisfile andits useinthe rest of the code for theapplicationprogram in more

Ngày tải lên: 13/08/2014, 08:21

... only granting the class members access pro-to their own methods The internal details of the class are thus “cut off” from the other classes, and youcan change the internal design of the class without ... ProjectSince the widgets of the Designer-generated dialog are available as publicly ac-cessible members of the UI class, they can be fine-tuned in the code later on by calling the methods of the respective ... whereby the class name corresponds to the objectName attribute of the form created in theDesigner There are now three ways of using and functionally developing the widget created.Which of these

Ngày tải lên: 13/08/2014, 08:21

... first determine the alignmentof the splitter We obtain the position of the splitter, using the QSplitter::indexOf() method This is also the position of the widget lying to the right of (or directly ... this function also requires theposition of the widget, apart from the stretch, you first have to define the position of the widget using the indexOf() method This returns the correct position for ... readSettings(), as the final step in the constructor of the class It reads the settings and applies them to the finished main window, using restoreState() restoreState() restores the internal status of the main

Ngày tải lên: 13/08/2014, 08:21

... method of the targetobject The task of the event() method is to either process or ignore the incomingevents, depending on the requirements of the class of the receiving object This method is therefore ... widget, the head-ing, and the user query This is followed by the list of strings to be displayed Then comes the index of the list element that the drop-down widget displays at the be-ginning The ... tr("Please enter year of birth"), 1982, The first two arguments of this are—as in other dialogs—a pointer to the parent widget and the heading of the dialog Then getInteger() expects an

Ngày tải lên: 13/08/2014, 08:21

... rowof thetable consists of twocells,one of which contains thenameofthe address book field (the key)and theother,the matching value.Bothofthemwillbeshowninthe tooltiponlyif the value is notthe ... discover thelabelingofthe rowsand columns via theheaderData()method. To do so,theymustspecifythenumeric positionofthe section of datafor which theheading is desired, where asection is either arowor ... keep track of the selection status of the respective line in the checkedStates list We can find out the number of datasets through the number of newline... one of the view

Ngày tải lên: 13/08/2014, 08:21

... height); Then we define the dimensions of the chart These should exactly match the height of the widget We obtain this height value from the current size of the widget: Trang 18rect() returns the ... draw the legend text next to the square So that the distancefrom the square to the text is adjusted to the size of the font used, we select thewidth of the letter x in the respective font as the ... returns the larger element In the same way, qMin() also exists The width is determined by the following parameters: the widget height of thesquare of the pie,5the longest entry in the hash table, the

Ngày tải lên: 13/08/2014, 08:21

... (QPainter::CompositionMode_Xor), the Painter links the alpha valueof the source (subtracted from the inverse of the destination) to the destination,the alpha value of which it subtracts from the inverse of the source The ... the name of the file to be analyzed as the first argument If there is a second argument, it writes theoutput to the file named there Otherwise, the modified file appears on the consolevia the standard ... dependent on an event loop In the main() function we first check whether there is at least one argument apartfrom the name of the executable Then we try to open the file for reading If it doesnot

Ngày tải lên: 13/08/2014, 08:21

... QtXmlmethod of the active model We obtain the index of the current entry from theargument of the slot As the role we select UserRole, where we previously stored thecomplete contents of the<description> ... flex-ibly to the particularities of another language One aspect of this is the translation of all visible texts into the target language The direction of text flow, on which the arrangement of widgets ... (QDomNodes) QDomNodes know the principle of parenthood: If they are inserted in another part of the tree, they are not copied, but change their location in the tree The node into which a QDomNode

Ngày tải lên: 13/08/2014, 08:21

... STL iterators, one of which marks the beginning of the area in the first data structure containing the elements to be compared, and the other, which marks the end of this area The third parameter ... as set union and set difference The following example first creates two sets and then forms the set difference of one of the two sets in terms of the other one The subtract() method responsible ... Tulip has the function qFind() This finds the valuespecified as the third argument, starting from the element to which the iteratornamed as the first argument points The last element of the search

Ngày tải lên: 13/08/2014, 08:21

... that of leading the student through the maze of a new science and teaching him the skill of an old art, exemplified in a long line of masters By way of preface we may say that the mastery of the ... sounds The most important variations are as follows: C and G have each a soft sound and a hard sound The soft sound of c is the same as s, and the hard sound the same as k The soft sound of g is the ... with or without the help of the voice, and incapable of being prolonged The first class of sounds is called vowel sounds, the second, consonant sounds Of the twenty-six letters of the alphabet,

Ngày tải lên: 07/11/2012, 15:59

... Ionic octastyle templeswith the Parthenon,41 27 Parthenon, Athens,42 28 Parthenon, Athens,43 29 Temple of Athena, Paestum (ancient GreekPoseidonia),46 30 The symbol of the tetraktys,46 31 Temple ... into the eyes, which takes place in “the eye of the soul” (t¼ tvyucv Àmma, 533d) as well The metaphor of sex therefore heightens the reader’s awareness of the rience of seeing, amplifying the ... but more likelythe details and overall forms of the building themselves, from the fluting of theErechtheion’s columns to unprecedented, sweeping, monumental curvature ofthe Theater of Dionysos (Figure

Ngày tải lên: 15/11/2012, 10:32

... point of view, but also in that the total synthesis of each molecule reflects the limits of the power of the art and science of organic synthesis at the time of the accomplishment One of the most ... he wants to improve our knowledge of the reactions and the chemical properties of the molecule If the The Art and Science of Total Synthesis at the Dawn of the Twenty-First Century** K C Nicolaou,* ... followed them The rather straightforward synthesis of equilenin is representative of the total syntheses of pre-World War II eraÐwith the exception of Robinsons unique tropinone synthesis In

Ngày tải lên: 29/04/2013, 10:27

... provides a systematic way of creating winning strategiesbased on the timeless ideas of Sun Tzu The book is made complete by the inclusion of the original translation of The Art of War by Samuel B Griffith ... prosperously Therefore,ethical use of the principles put forth here is required Thejourney When you come to understand the principles of Sun Tzu and the Art of Business, how they relate to one another ... the west that the real strike force of Desert Storm was located One day after the Marines had fixed theattention of the Iraqis, a tempest of artillery fire announced the attack of the Coalition

Ngày tải lên: 18/08/2013, 12:22

... seat.” Developing the Hack Mike, Alex, and Marco lugged the machine upstairs to the second floor of a house where they had been offered the use of a spare bedroom Thethrill of the experience would ... so, by imitating the pattern ofgiving and caring, I, in a sense, follow the paths of their lives I hopethey’ll forgive me for putting them on the back burner during the process of writing this ... input the speed of the roulette wheel and how the ball wasspinning, and the computer would then feed tones by radio to a hearingaid in the ear of another team member, who would interpret the signalsand

Ngày tải lên: 18/10/2013, 21:15

... upward through the center Make a dot for the roof height 3 Using the vanishing point, draw a line for the angle of the roof ridge; then draw the back of the roof The angled roof lines will meet ... surrounding them and then fill in the shapes with the side of a soft lead pencil Once you establish the shape of the fence, refine the sketch a bit by adding some light shading on the railings ... outward from the seed and the top of the slice Trang 26Drawing the Cherry To start the cherry, lightly block in the round shape and the stem, using a combination of short sketch lines Smooth the sketch

Ngày tải lên: 08/11/2013, 13:51

... wire-walkers, the clowns ran into the Big Top and did their acts The audience was kept busy watching their antics, while the other work was going on The moment the rigging was finished, the clowns ... andtake it off Clown Alley was also a storage place for the larger props needed in the acts There were thestilt walker’s ten-foot stilts, the funny carts, and the tiny fire wagon There were the human-sizerazors ... peaks of their pointed hats They usually wore ruffled collars, and they were the first clowns to use white makeup The clown suits worn to Halloween parties today are like thePierrot costumes The

Ngày tải lên: 10/12/2013, 04:15

... possible that they would have prevented the discovery of one of the most beautiful theories in the whole of mathematics: the theory of elliptic functions, which leads naturally to the theory of modular ... enjoy both the mathematics and the software Taken together,they are the story of a sequence of very recent developments that have changed thefield on which the game of discrete mathematics is ... present the underlying mathematical theory of these methods, the princi-pal theorems and their proofs, and we also include a package of computer programs that will do these tasks (see Appendix A) The

Ngày tải lên: 20/12/2013, 19:15

... as part of the LIB path) Another common problem with running HLA is the use of the wrong link.exe program Microsoft has distributed several different versions of link.exe; in particular, there ... instal-lation of VC++ should have set up the LIB path for you If not, then locate these files (they are part of the MASM32 distribution) and copy them to the HLA\HLALIB directory (note that the ihla.bat ... distributions let you run the command prompt windows from the Start menu or from a submenu hanging off the start menu (you may also select “RUN” from the Start menu and type “cmd” as the program name)

Ngày tải lên: 22/12/2013, 19:17

... also: Fasten ears onto the back of the head the muzzle, the long part of the nose, For simplicity, indicate the base with and the base of the skull an oval Line up the eye with the ears and correct ... into the take-off Here is another example of stretch In the sketch below, note the chang- ing leg actions and the stretching Observe in the middle drawing how the right leg reacts to the weight of ... with their attention drawn up The rear quarters are dropped, and the tails are between the legs The lions below express a mood of lazy contentment Like their domestic cousins, lions as these, The

Ngày tải lên: 21/01/2014, 08:20