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ased Symbian OS phones. The Storage Manager on the emulator is only useful for installing data or pure Java programs or, if required, checking that a secure .sis file is working. 14.3.6 Delivering Applications to End Users We've now described how you can use the Installation File Generator (makesis) to produce a .sis file and how to transfer and install that file from a PC onto your phone. In reality, the main customer of a .sis file is an end user, so it's important to think carefully about delivering applications: � Make sure you replace test UIDs with releasable UIDs allocated by Symbian, as explained in <strong>Chapter</strong> 4. � Provide enough instructions to make it easy for end users to install and uninstall your software. 14.4 Designing Applications for UIQ – Some Guidelines By now, you may feel that you're beginning to get used to the style of applications built using the UIQ GUI. Style here is not in the way you program, but in the way that users see your programs. Good application style (like good programming) is partly something provided and enabled by the system, and partly something you have to do yourself. The application style guidelines for UIQ are designed to take some fundamental things into account: � End users may not be very knowledgeable about computers. They might be frightened by many kinds of technology, but we want them to feel comfortable with Symbian OS and its applications. If you've read this book this far, you're probably not one of them – so you have to think hard if you're going to deliver friendly, easy to use applications to average end users. � The physical parameters of the hardware −208 × 320 pixels or 240 × 320 pixels VGA portrait screen, pen-operation, no keyboard, hardware keys for up, down and confirm, built-in phone with speaker and microphone. � Basic usability criteria such as task-orientation, browse-mostly, single- tap to open, hiding the file system and task list, use of views, menus, folders and dialogs. The different physical parameters of phones dictate that Symbian and its licensees support several different user interfaces and the changing application suite requirements will affect the things we consider important in a GUI. For the moment, however, we'll concentrate on UIQ as it is. Apart from following the UIQ style guide, it is also worth looking at the built-in applications and taking inspiration from them. The more time you spend planning and designing your application, the easier you will find it is to create and the more rewarding the end result will be. The following sections list some of the most important GUI style rules for UIQ. More detailed information on designing for UIQ smartphones can be found in the UIQ Style Guide, and Designing for UIQ within the Technical Papers section of the Developer Library in the UIQ SDK. 14.4.1 Planning the GUI Before you start creating the GUI of your application, the following stylistic aspects are worth considering:
� Every application should fill the screen. The screen is small enough as it is, and there's no point in making your user interface smaller than that. Note There are exceptions to this rule – in fact, there are good exception cases for most style guide rules. For instance, an application designed to add handwriting recognition to a device that doesn't build it in would need to use a window that floats above the current application. A fullscreen window would be entirely the wrong approach in this case. Arguably, the word 'application' is also wrong for such a program. � Each application should have a menu bar, usually containing an Application menu, an Edit menu and an optional Folders menu. A button bar is optional, but the status bar should always be visible. � Each application should take into account the different methods of inputting text, whether it's through handwriting recognition or the virtual keyboard – or both. � Good color contrast (a color that stands out from the background) and a nonserif font of reasonable size and type should be used for all non-dimmed items in the user interface. � Make your application's main features easy to find out about (and easy to use) through the menus, button bar, different views, and folders. � Try to fit most of the application features within the designated application space – only use scroll bars and scroll arrows where absolutely necessary. � Create icons that have specific meanings within the user interface (not just for decoration), and apply them where most appropriate – within the application space, menus or on the button bar. Make sure they are dimmed out when not in use. � Design the user interface so that it renders well for the different zoom levels supported by the system. 14.4.2 Designing List and Detail Views In UIQ, users do not have access to a file system, so applications must provide their own means of selecting data to view and edit. This is done through List views and Detail views. List views display multiple entries vertically, allowing users to browse to, navigate to and open a specific entry: � Make sure that they are scrollable where necessary. � Don't include menu options that act on individual entries in the list. Detail views are reachable from list views and focus on data to be edited, through tabs: � Provide multiple tabs on the button bar to show different parts of the editable data. � Reuse system icons or provide text for the tabs. 14.4.3 Designing Menus and Folders The menu bar should always be visible. As mentioned earlier, it will normally include an Application menu, the standard Edit menu and, optionally, a Folders menu: � Use the name of the application for the Application menu. � Keep the menus consistent as far as possible between different views. � Avoid using cascading menus unless absolutely necessary. � Make the text for menu commands as short as possible and use the ampersand instead of the word 'and'. � Don't repeat the wording on the menu bar or cascading menu item (if applicable). � Dim unavailable menu items in most cases., � Use radio buttons for 'Sort by' commands. � Avoid ellipses to indicate commands that lead to dialogs. � Use dividers to group similar commands together.
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Table of Contents Symbian OS C++ fo
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Reprinted August 2003 All Rights Re
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� consultants, trainers, and auth
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Symbian OS C++ for Mobile Phones fo
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When you're ready to use the Symbia
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improvement. She has a reputation f
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John works in the partner projects
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If you've never seen Symbian OS bef
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within a particular application. In
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There are a number of other ways in
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programs - namely, to handle and re
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There is no need to trap the call t
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abld build winscw udeb The winscw p
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If you're curious, you might want t
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If your connectivity software does
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Chapter 2: System Structure Overvie
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Figure 2.2 Figure 2.3 Symbian OS OE
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Note Actually, for performance reas
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To be executed, an executable has t
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The kernel itself has two major com
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ROM handling is easy. The ROM consi
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You can control the stack size in a
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industry standard, slightly smaller
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A server also uses its own active o
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In order to minimize any difficulty
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� The top-level project name in t
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Title DLL Source Group Headers Desc
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Chapter 3: C++ and Object Orientati
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The fundamental rule is, use names
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Category Examples Description Const
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3.2.6 Summary Naming conventions ar
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Convenience functions are trivial w
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� When declaring a virtual functi
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used in preference to old style C c
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Java uses interfaces too: in Java,
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� Whether these are private or pu
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If the cardinality is not 1-to-1, t
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Figure 4.1 At the bottom is the GDI
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In addition to the four C++ classes
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In addition, as indicated by the SO
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Figure 4.3 SDK and then browse to t
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eturn KErrNone; } Important You mus
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private: // from CEikDocument CEikA
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ConstructL() performs second-phase
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hellogui's application view is a co
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The other things we haven't seen in
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form described above advertises the
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} RESOURCE TBUF r_hellogui_text_hel
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CQikAppUi::HandleWsEventL(const TWs
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4.9 Terminating the Application By
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debug stepping, variable watching,
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5.1 Strings and Memory To understan
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� HBufC* is a pointer to a heap-b
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strlen() doesn't include the traili
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The Des() function returns a TPtr c
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TBuf helloWorld(_L("hello")); greet
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TDes& parameters. Symbian OS itself
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5.4 More Text APIs Symbian OS uses
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encodings of Unicode that use seque
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Chapter 6: Error Handling and Clean
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Even user input errors can be handl
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Note It also demonstrates that the
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eak; So, the New 1 menu item alloca
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this line yourself, and then rerun
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case EMagicCmdNew2: delete iObject2
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If the new(ELeave) fails, then iObj
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If you're writing a function, and t
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} You can invoke these functions fr
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Any one of the calls to UseL() may
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case EMagicCmdUse4: { CY* y = new(E
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� Functions that can leave must o
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CZ::NewL() was actually coded waste
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TAny*. The cleanup code will deallo
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successfully). This means you have
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User::Leave(KErrNone). This appears
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systems outside my control, and res
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Chapter 7: Resource Files Overview
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Data Type Description BUF A Unicode
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} MENU_ITEM { command = EExampleCmd
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A single resource file supports 409
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Filename Description EeikCmdExit, a
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RESOURCE MENU_PANE r_hellogui_hello
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0E [uncompressed data run length] 0
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Chapter 8: Basic APIs Overview We'v
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IMPORT_C void Write(TInt aPos, cons
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_LIT8(KTxt2," world"); buf->InsertL
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Dynamic buffers are also used to st
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Class name Description [*] CArrayFi
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In v7.0, the structure of ROM image
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} In a function such as FormatList(
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library. The next few pages should
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Using this technique, your program
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� The original program consisted
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pointer, and no method of directly
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Figure 9.1 It's a pretty Spartan di
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Note 9.2.3 The Controller As descri
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TInt iLength; // Length - determine
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void SetHit(TInt aX, TInt aY); // H
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The functions to do this are Functi
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User::After(1) is guaranteed to wai
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{ public: // Construct/destruct/set
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This begins by creating a new windo
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); aRect.iTl.iX+iBorderSize+i*iTile
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else gc.SetPenColor(KRgbYellow); gc
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control framework needs to know whe
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the board. It then uses these coord
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Calculate board size in twips, and
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iRightBorder.Move(offset); iBoardRe
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private: // Construct/restore void
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ViewCmdHitFleet() shows how the con
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There are no surprises in the comma
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}; MENU_ITEM {command=EEikCmdZoomIn
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The framework handles creating a fi
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void TShip::ExternalizeL(RWriteStre
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void CGameAppUi::HandleCommandL(TIn
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the target view. Because such messa
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TInt iCursorX; TInt iCursorY; TUid
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display area) and to handle a parti
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Create and load a bitmap iHideBitma
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This version formats the message ID
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Chapter 10: Dialogs and Concrete Co
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Figure 10.2 I got this by typing Ct
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Finally, note that buttons can't be
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for 'control'. I'll always use 'con
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CEikDialog* dialog = new(ELeave) CE
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Simply put, the dialog has a title,
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OK is handled by OkToExitL(). In fa
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Any of the checks or file operation
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}; id = EGameControlIdProtocol; con
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Listen"; } type = EEikCtChoiceList;
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TUid protocol = TUid::Uid(choicelis
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10.3.2 Adding Buttons If you want t
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Function Description virtual void S
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� specify initialization data for
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CEikBorderedControl CEikBorderedCon
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� eikon.rh and Qikon.rh contain t
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Class Header ID CEikGlobalTextEdito
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UIs provide many other standard dia
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Figure 11.1 As it happens, this scr
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gc.DrawText(*iHelloWorld, rect, bas
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The two points that define Trect ca
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The clipping region defines the reg
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virtual void DrawBitmap(const TRect
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Figure 11.5 From the diagram: � T
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In theory, then, you don't need to
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So far, we have suggested that you
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DrawBorders(); DrawTiles(); } but t
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It turns out that working out exact
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Now it's time to be precise about h
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Figure 11.10 It has a single window
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{ public: . . . static CExampleHell
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case 2: return EAmountOfControls; }
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finished. When the BeginRedraw()fun
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Default settings are assured here:
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First and foremost, a control is a
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class CCoeControl : public CBase {
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You can set a control's position an
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IMPORT_C virtual void Draw(const TR
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� If you select OK on a dialog -
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In this chapter, I've concentrated
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TKeyResponse COppFleetView::OfferKe
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TEventCode is the type of window se
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notification, and changing the curs
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From the preceding discussion, it s
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� if the Set interval button is s
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� The general-purpose control des
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private: ... MCoeControlObserver* i
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Special-purpose events should be ha
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Figure 12.4 Key events are offered
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A control should change its appeara
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12.4.3 Grabbing the Pointer-down Co
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ProcessPointerEventL() implements t
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In the last chapter, we concentrate
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making them lighter or darker. For
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Chapter 13: Files, Streams, and Sto
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Note Strictly, documents are not th
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Figure 13.2 The file server provide
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� changing directory and file att
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Page 359 and 360: Figure 13.5: � Write file allows
Page 361 and 362: TryChangeFocusToL(EExampleControlId
Page 363 and 364: file.Close(); // Finished with user
Page 365 and 366: Update view iAppView->DrawNow(); }
Page 367 and 368: } // Finish CleanupStack::PopAndDes
Page 369 and 370: external stream and de-serialize wh
Page 371 and 372: RwriteStream Functions RReadStream
Page 373 and 374: You'll remember that I used this, w
Page 375 and 376: Technique Application descriptor wh
Page 377 and 378: Let's consider the file format of t
Page 379 and 380: � create, write, and close the ap
Page 381 and 382: Figure 13.10 The main document is a
Page 383 and 384: through the DBMS. For more on using
Page 385 and 386: Figure 13.13 There is a small class
Page 387 and 388: � Where an application's .ini fil
Page 389 and 390: The first step of the process is to
Page 391 and 392: END SOURCE 1 icon2mask.bmp SOURCE c
Page 393 and 394: id=EHelloGuiCmd0; flags=EEikToolBar
Page 395 and 396: Figure 14.4 abld build winscw udeb
Page 397 and 398: For the purpose of this book, we'll
Page 399 and 400: #include RESOURCE AIF_DATA { capti
Page 401 and 402: 1 file(s) copied. When this has fin
Page 403 and 404: The way the Certificate Generator w
Page 405 and 406: The body of this file should be obv
Page 407: Don't expect the installed applicat
Page 411 and 412: � Use bold style for active text
Page 413 and 414: Overview This chapter discusses wri
Page 415 and 416: Class Description CExampleApplicati
Page 417 and 418: Class Description Figure 15.3 conta
Page 419 and 420: aDeviceRect.Center().iY - boxInPixe
Page 421 and 422: } fontSpec)); The key function here
Page 423 and 424: The second case will cause problems
Page 425 and 426: I'm careful to draw every pixel: I
Page 427 and 428: SetZoomOutL() works the other way r
Page 429 and 430: ealistic print code would take acco
Page 431 and 432: Figure 15.7 The base class for bitm
Page 433 and 434: lit them efficiently from a shared
Page 435 and 436: #define KRgbYellow TRgb(0x00ffff) #
Page 437 and 438: world colors mapped down onto black
Page 439 and 440: Figure 15.8 The GUI used in the Psi
Page 441 and 442: In terms of applications, the appli
Page 443 and 444: Overview So far in this book, we've
Page 445 and 446: Figure 16.2 The starting point for
Page 447 and 448: if (iController->Engine().IsMyTurn(
Page 449 and 450: device, I will have to publish thes
Page 451 and 452: � If your request didn't get thro
Page 453 and 454: Communications is full of this kind
Page 455 and 456: The game will connect and you can s
Page 457 and 458: Figure 16.9 The controller contains
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iEngine->iOppFleet.SetShipType(aX,
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if(!iController->IsMyTurn()) iEikon
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Of course, the opponent's response
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wrong with it. And it may not alway
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fleet.SetHit(x,y); // update view i
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With this scheme, each chat message
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For a minimum level of skill, the c
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CONE maintains an outstanding reque
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Figure 17.2 It is also worth mentio
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some function that will later gener
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So the scheduler handles precisely
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CActive implements the Cancel() fun
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A RunL() function can stop the acti
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}; Figure 17.9 Member functions her
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Function Description Stop() Decreas
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17.3.1 Maintaining an Outstanding R
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Change visibility of app view text
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static CMultiPartHello* NewL(CActiv
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iTimer.After(iStatus, iDelay); SetA
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I prefer to hide active objects fro
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In active objects, higher priority
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Figure 18.1 Some simple server tran
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A new session has a handle that is
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Figure 18.4 Before any subsessions
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Figure 18.5 When the buffer is full
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Related servers can be run in the s
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� Request the window server to dr
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This is because, when a client thre
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Figure 18.8 18.4.1 Thread Basics Th
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GetDesLength() return this as their
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class RSessionBase : public RHandle
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RSubSessionBase - client-side sub-s
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Bootstrap code for a server should
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The CSharableSession class provides
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RMessage is not intended for deriva
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The GSDP server presented here has
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IMPORT_C TInt GetGdpProtocolInfo(TI
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with all four slots, even if you do
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}; RGsdpSession::Listen() calls CGs
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inline RGsdpSession() : iHandler(0)
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If, in the first step above, the ke
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The GSDP client API implements a sy
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� Function() gives me the request
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Basically, the setter stores its ar
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As we saw in Chapter 17, any API pr
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Many Symbian OS servers use polymor
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construct shutdown timer iShutdown=
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void CGsdpProtocolUpdater::RunL() {
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GSDP clients can select the protoco
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} }; } }; } version_no = 1; display
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} aFromPort, aData); If iLastError
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� The datagram arrives via a GDP
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AddPacket() is a method provided by
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iReceiveMessage.Complete(KErrNone);
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� The client program launches a n
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server.Close(); return died.Int();
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CGsdpScheduler::TServerStart start;
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aStart.SignalL(); CActiveScheduler:
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19.4 Summary In this chapter, we've
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Figure 20.1 Typically, a communicat
Page 579 and 580:
This encapsulation is important, as
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else // Everything was OK, leave th
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suite of protocols: UDP, TCP, ICMP
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member of the GDP-SMS session objec
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This puts it into an initial state,
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void CGdpSmsSender::TSendMsgState::
Page 591 and 592:
If, for some reason, the operation
Page 593 and 594:
RSmsSocketReadStream readstream(iRe
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Bluetooth is composed of a hierarch
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Figure 20.10 shows two sequential o
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As with GDP-SMS, the SendL() functi
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Once connected, the sockets interfa
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err = iListenSocket.Listen(4); User
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iReceiver.iReadSocket.Read(iReceive
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Appendix 1: Example Projects Overvi
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AppForge development software integ
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Psion has a long history of using S
Page 613 and 614:
Appendix 3: TOGS Guide and Referenc
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protected: TUid iDtor_ID_Key; }; CG
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eturn KErrNone; } TInt CGdpLoopback
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packet to the initiating partner: t
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inline RGsdpSession() : iHandler(0)
Page 623 and 624:
Function Description MGsdpPacketHan
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RGCP TOGS is designed to support tu
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Packet structure RGCP uses GSDP as
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State Meaning responses are handled
Page 631 and 632:
Figure A3.10 Here's CRgcpSession's
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void GsdpHandleL(const TDesC8& aDat
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virtual void RgcpHandleBound() = 0;
Page 637 and 638:
State Meaning Listening You have ch
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From To Occurs When other player, t
Page 641 and 642:
Opcode Name Details want-second.Res
Page 643 and 644:
Appendix 4: Emulator Reference Over
Page 645 and 646:
Figure A4.2 This source compatibili
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Figure A4.5 An emulator configurati
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Each Symbian OS .exe built for the
Page 651 and 652:
In different UIs, there can be addi
Page 653 and 654:
ARM data alignment rules are strict
Page 655 and 656:
Key Description W Dump full window
Page 657 and 658:
event handling threads 569 events,
Page 659 and 660:
Application Programming Interfaces
Page 661 and 662:
Boolean data type 55 Boss Puzzle di
Page 663 and 664:
CGsdpSession 650 CanReceivePacket()
Page 665 and 666:
certificate file 472 Certificate Ge
Page 667 and 668:
ServiceL error handling 646 CGsdpSe
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CObjectIx class 614 CodeWarrior deb
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context switching 27 performance is
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CSession class 598, 614, 624 CShara
Page 675 and 676:
text 501 fonts 495 GDI 507 line dra
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const rule, breaking 334 descriptio
Page 679 and 680:
DrawVerticalBorder() function 238 D
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ExternalizeL() function 261 testing
Page 683 and 684:
files 416 copying to emulator 773 s
Page 685 and 686:
G game datagram protocol see GDP pr
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drawing 237 zooming 245 GetZoom() f
Page 689 and 690:
graphics interaction 370 pick corre
Page 691 and 692:
Install() function CActiveScheduler
Page 693 and 694:
graphics interaction handling 370 O
Page 695 and 696:
summary 485 MakeVisible() function
Page 697 and 698:
multithreading 43 MVC 287 controlle
Page 699 and 700:
packets see datagrams palettes 516
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private key 472 privilege boundarie
Page 703 and 704:
ReceiveAllL() 697 ReceivePacket() f
Page 705 and 706:
Revo 23 RFCOMM 701 RFile class 46 v
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RWriteStream 425 streams 430 vs. RF
Page 709 and 710:
CGraphicsContext class 324 SetBrush
Page 711 and 712:
simple getter functions 60 single-p
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Static() function CCoeEnv class 357
Page 715 and 716:
ESOCK sockets server 526 ETEL telep
Page 717 and 718:
TDisplayMode 516 Telephony server 6
Page 719 and 720:
TParsePtr 418 TParsePtrC 418 TPckg
Page 721 and 722:
derivation relationships 75 Unicode
Page 723:
flicker-free redraw 354 invalid reg
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