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LIBRARY euser.lib This is enough information to specify the entire project, enabling configuration files to be created for any platform or environment. � The TARGET specifies the executable to be generated, and the TARGETTYPE confirms that it is a .exe � The UID information is irrelevant for .exes, but I specify it explicitly as zero here, to suppress a build warning. I'll have more to say on UIDs in <strong>Chapter</strong> 4, since they are more important for GUI programs. � SOURCEPATH specifies the location of the source files for this project. � SOURCE specifies the single source file, hellotext.cpp (in later projects, we'll see that SOURCE can be used to specify multiple source files). � USERINCLUDE and SYSTEMINCLUDE specify the directories to be searched for user (included with quotes; the SYSTEMINCLUDE path is searched as well) and system include files (included with angle brackets; only the SYSTEMINCLUDE path is searched). All Symbian OS projects should specify \epoc32\include\ for their SYSTEM-INCLUDE path. � LIBRARY specifies libraries to link to – these are the .lib files corresponding to the shared library DLLs whose functions you will be calling at runtime. In the case of this very simple program, all we need is the E32 user library, euser.lib. 1.2.3 The Component Definition File The Symbian OS build tools require one further component definition file to be present. This file always has the name bld.inf and contains a list of all the project definition files (frequently, there is only one) that make up the component. In more complex cases it will usually contain further build-related information, but the one for HelloText is simply // BLD.INF PRJ_MMPFILES hellotext.mmp 1.2.4 Building from the Command Line Make sure you've installed the example project source from the Symbian website: see the appendices for how to do this. To start the command-line build, open up a command prompt, change to your installation drive, and issue the following command to get into the source directory for this example: cd \scmp\hellotext Next, you need to invoke bldmake by typing bldmake bldfiles After a short pause, this command will return – by default, bldmake doesn't tell you anything. However, if you check the contents of the source directory, you'll notice a new file, abld.bat, that is used to drive the remainder of the build process. You will also find that the epoc32 directory tree contains a new \epoc32\build\scmp\hellotext directory that contains a number of generated files that relate to the various types of build that the build tools support. Next, use abld to run the rest of the build by typing:
abld build winscw udeb The winscw parameter specifies that we are building for the emulator, using the CodeWarrior compiler, and the udeb parameter means we are using a (unicode) debug build. The command generates the following output: make -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\EXPORT.make" EXPORT VERBOSE=-s Nothing to do make -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\WINSCW.make" MAKEFILE VERBOSE=-s perl -S makmake.pl -D \SCMP\HELLOTEXT\HELLOTEXT WINSCW make -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\WINSCW.make" LIBRARY VERBOSE=-s make -s -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\HELLOTEXT\WINSCW\HELLOTEXT.WINSCW" LIBRARY make -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\WINSCW.make" RESOURCE CFG=UDEB VERBOSE=-s make -s -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\HELLOTEXT\WINSCW\HELLOTEXT.WINSCW" RESOURCEUDEB make -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\WINSCW.make" TARGET CFG=UDEB VERBOSE=-s make -s -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\HELLOTEXT\WINSCW\HELLOTEXT.WINSCW" UDEB make -r -f "\EPOC32\BUILD\SCMP\HELLOTEXT\WINSCW.make" FINAL CFG=UDEB VERBOSE=-s The build is split into six phases: � The export phase copies exported files to their destinations. This typically includes copying public header files into the \epoc32\includedirectory. For many applications, as in the current case, this stage will need to do nothing. � The makefile phase creates the necessary makefiles or IDE workspaces. � The library phase creates import libraries. � The resource phase creates the application's resources files, bitmaps and application information files (aifs). � The target phase essentially creates the application's main executables. � The final phase is present to perform any final actions that need to be done after the main executables have been created. For most applications, this phase will do nothing. These phases, and other possible options available with the abld tool, are fully described in the Build Tools Guide and Build Tools Reference sections of the Developer Library documentation supplied with Symbian OS SDKs. Typing 'abld help' also gives a useful summary of the options available.
Page 1 and 2: Table of Contents Symbian OS C++ fo
Page 3 and 4: Reprinted August 2003 All Rights Re
Page 5 and 6: � consultants, trainers, and auth
Page 7 and 8: Symbian OS C++ for Mobile Phones fo
Page 9 and 10: When you're ready to use the Symbia
Page 11 and 12: improvement. She has a reputation f
Page 13 and 14: John works in the partner projects
Page 15 and 16: If you've never seen Symbian OS bef
Page 17 and 18: within a particular application. In
Page 19 and 20: There are a number of other ways in
Page 21 and 22: programs - namely, to handle and re
Page 23: There is no need to trap the call t
Page 27 and 28: If you're curious, you might want t
Page 29 and 30: If your connectivity software does
Page 31 and 32: Chapter 2: System Structure Overvie
Page 33 and 34: Figure 2.2 Figure 2.3 Symbian OS OE
Page 35 and 36: Note Actually, for performance reas
Page 37 and 38: To be executed, an executable has t
Page 39 and 40: The kernel itself has two major com
Page 41 and 42: ROM handling is easy. The ROM consi
Page 43 and 44: You can control the stack size in a
Page 45 and 46: industry standard, slightly smaller
Page 47 and 48: A server also uses its own active o
Page 49 and 50: In order to minimize any difficulty
Page 51 and 52: � The top-level project name in t
Page 53 and 54: Title DLL Source Group Headers Desc
Page 55 and 56: Chapter 3: C++ and Object Orientati
Page 57 and 58: The fundamental rule is, use names
Page 59 and 60: Category Examples Description Const
Page 61 and 62: 3.2.6 Summary Naming conventions ar
Page 63 and 64: Convenience functions are trivial w
Page 65 and 66: � When declaring a virtual functi
Page 67 and 68: used in preference to old style C c
Page 69 and 70: Java uses interfaces too: in Java,
Page 71 and 72: � Whether these are private or pu
Page 73 and 74: If the cardinality is not 1-to-1, t
Page 75 and 76:
Figure 4.1 At the bottom is the GDI
Page 77 and 78:
In addition to the four C++ classes
Page 79 and 80:
In addition, as indicated by the SO
Page 81 and 82:
Figure 4.3 SDK and then browse to t
Page 83 and 84:
eturn KErrNone; } Important You mus
Page 85 and 86:
private: // from CEikDocument CEikA
Page 87 and 88:
ConstructL() performs second-phase
Page 89 and 90:
hellogui's application view is a co
Page 91 and 92:
The other things we haven't seen in
Page 93 and 94:
form described above advertises the
Page 95 and 96:
} RESOURCE TBUF r_hellogui_text_hel
Page 97 and 98:
CQikAppUi::HandleWsEventL(const TWs
Page 99 and 100:
4.9 Terminating the Application By
Page 101 and 102:
debug stepping, variable watching,
Page 103 and 104:
5.1 Strings and Memory To understan
Page 105 and 106:
� HBufC* is a pointer to a heap-b
Page 107 and 108:
strlen() doesn't include the traili
Page 109 and 110:
The Des() function returns a TPtr c
Page 111 and 112:
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
Page 117 and 118:
encodings of Unicode that use seque
Page 119 and 120:
Chapter 6: Error Handling and Clean
Page 121 and 122:
Even user input errors can be handl
Page 123 and 124:
Note It also demonstrates that the
Page 125 and 126:
eak; So, the New 1 menu item alloca
Page 127 and 128:
this line yourself, and then rerun
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case EMagicCmdNew2: delete iObject2
Page 131 and 132:
If the new(ELeave) fails, then iObj
Page 133 and 134:
If you're writing a function, and t
Page 135 and 136:
} You can invoke these functions fr
Page 137 and 138:
Any one of the calls to UseL() may
Page 139 and 140:
case EMagicCmdUse4: { CY* y = new(E
Page 141 and 142:
� 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
Page 147 and 148:
successfully). This means you have
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User::Leave(KErrNone). This appears
Page 151 and 152:
systems outside my control, and res
Page 153 and 154:
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
Page 175 and 176:
Class name Description [*] CArrayFi
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In v7.0, the structure of ROM image
Page 179 and 180:
} 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
Page 185 and 186:
� The original program consisted
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pointer, and no method of directly
Page 189 and 190:
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
Page 231 and 232:
the target view. Because such messa
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TInt iCursorX; TInt iCursorY; TUid
Page 235 and 236:
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
Page 241 and 242:
Chapter 10: Dialogs and Concrete Co
Page 243 and 244:
Figure 10.2 I got this by typing Ct
Page 245 and 246:
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
Page 257 and 258:
}; 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
Page 269 and 270:
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
Page 297 and 298:
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
Page 329 and 330:
� 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
Page 353 and 354:
Figure 13.2 The file server provide
Page 355 and 356:
� changing directory and file att
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important in Symbian OS, so it's pr
Page 359 and 360:
Figure 13.5: � Write file allows
Page 361 and 362:
TryChangeFocusToL(EExampleControlId
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file.Close(); // Finished with user
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Update view iAppView->DrawNow(); }
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} // Finish CleanupStack::PopAndDes
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external stream and de-serialize wh
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RwriteStream Functions RReadStream
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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
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� Where an application's .ini fil
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The first step of the process is to
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END SOURCE 1 icon2mask.bmp SOURCE c
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id=EHelloGuiCmd0; flags=EEikToolBar
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Figure 14.4 abld build winscw udeb
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For the purpose of this book, we'll
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#include RESOURCE AIF_DATA { capti
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1 file(s) copied. When this has fin
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The way the Certificate Generator w
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The body of this file should be obv
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Don't expect the installed applicat
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� Every application should fill t
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� Use bold style for active text
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Overview This chapter discusses wri
Page 415 and 416:
Class Description CExampleApplicati
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Class Description Figure 15.3 conta
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aDeviceRect.Center().iY - boxInPixe
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} fontSpec)); The key function here
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The second case will cause problems
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I'm careful to draw every pixel: I
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SetZoomOutL() works the other way r
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ealistic print code would take acco
Page 431 and 432:
Figure 15.7 The base class for bitm
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lit them efficiently from a shared
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#define KRgbYellow TRgb(0x00ffff) #
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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
Page 459 and 460:
iEngine->iOppFleet.SetShipType(aX,
Page 461 and 462:
if(!iController->IsMyTurn()) iEikon
Page 463 and 464:
Of course, the opponent's response
Page 465 and 466:
wrong with it. And it may not alway
Page 467 and 468:
fleet.SetHit(x,y); // update view i
Page 469 and 470:
With this scheme, each chat message
Page 471 and 472:
For a minimum level of skill, the c
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CONE maintains an outstanding reque
Page 475 and 476:
Figure 17.2 It is also worth mentio
Page 477 and 478:
some function that will later gener
Page 479 and 480:
So the scheduler handles precisely
Page 481 and 482:
CActive implements the Cancel() fun
Page 483 and 484:
A RunL() function can stop the acti
Page 485 and 486:
}; Figure 17.9 Member functions her
Page 487 and 488:
Function Description Stop() Decreas
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17.3.1 Maintaining an Outstanding R
Page 491 and 492:
Change visibility of app view text
Page 493 and 494:
static CMultiPartHello* NewL(CActiv
Page 495 and 496:
iTimer.After(iStatus, iDelay); SetA
Page 497 and 498:
I prefer to hide active objects fro
Page 499 and 500:
In active objects, higher priority
Page 501 and 502:
Figure 18.1 Some simple server tran
Page 503 and 504:
A new session has a handle that is
Page 505 and 506:
Figure 18.4 Before any subsessions
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Figure 18.5 When the buffer is full
Page 509 and 510:
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
Page 515 and 516:
Figure 18.8 18.4.1 Thread Basics Th
Page 517 and 518:
GetDesLength() return this as their
Page 519 and 520:
class RSessionBase : public RHandle
Page 521 and 522:
RSubSessionBase - client-side sub-s
Page 523 and 524:
Bootstrap code for a server should
Page 525 and 526:
The CSharableSession class provides
Page 527 and 528:
RMessage is not intended for deriva
Page 529 and 530:
The GSDP server presented here has
Page 531 and 532:
IMPORT_C TInt GetGdpProtocolInfo(TI
Page 533 and 534:
with all four slots, even if you do
Page 535 and 536:
}; RGsdpSession::Listen() calls CGs
Page 537 and 538:
inline RGsdpSession() : iHandler(0)
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If, in the first step above, the ke
Page 541 and 542:
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
Page 563 and 564:
AddPacket() is a method provided by
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iReceiveMessage.Complete(KErrNone);
Page 567 and 568:
� The client program launches a n
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server.Close(); return died.Int();
Page 571 and 572:
CGsdpScheduler::TServerStart start;
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aStart.SignalL(); CActiveScheduler:
Page 575 and 576:
19.4 Summary In this chapter, we've
Page 577 and 578:
Figure 20.1 Typically, a communicat
Page 579 and 580:
This encapsulation is important, as
Page 581 and 582:
else // Everything was OK, leave th
Page 583 and 584:
suite of protocols: UDP, TCP, ICMP
Page 585 and 586:
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
Page 595 and 596:
Bluetooth is composed of a hierarch
Page 597 and 598:
Figure 20.10 shows two sequential o
Page 599 and 600:
As with GDP-SMS, the SendL() functi
Page 601 and 602:
Once connected, the sockets interfa
Page 603 and 604:
err = iListenSocket.Listen(4); User
Page 605 and 606:
iReceiver.iReadSocket.Read(iReceive
Page 607 and 608:
Appendix 1: Example Projects Overvi
Page 609 and 610:
AppForge development software integ
Page 611 and 612:
Psion has a long history of using S
Page 613 and 614:
Appendix 3: TOGS Guide and Referenc
Page 615 and 616:
protected: TUid iDtor_ID_Key; }; CG
Page 617 and 618:
eturn KErrNone; } TInt CGdpLoopback
Page 619 and 620:
packet to the initiating partner: t
Page 621 and 622:
inline RGsdpSession() : iHandler(0)
Page 623 and 624:
Function Description MGsdpPacketHan
Page 625 and 626:
RGCP TOGS is designed to support tu
Page 627 and 628:
Packet structure RGCP uses GSDP as
Page 629 and 630:
State Meaning responses are handled
Page 631 and 632:
Figure A3.10 Here's CRgcpSession's
Page 633 and 634:
void GsdpHandleL(const TDesC8& aDat
Page 635 and 636:
virtual void RgcpHandleBound() = 0;
Page 637 and 638:
State Meaning Listening You have ch
Page 639 and 640:
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
Page 647 and 648:
Figure A4.5 An emulator configurati
Page 649 and 650:
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
Page 669 and 670:
CObjectIx class 614 CodeWarrior deb
Page 671 and 672:
context switching 27 performance is
Page 673 and 674:
CSession class 598, 614, 624 CShara
Page 675 and 676:
text 501 fonts 495 GDI 507 line dra
Page 677 and 678:
const rule, breaking 334 descriptio
Page 679 and 680:
DrawVerticalBorder() function 238 D
Page 681 and 682:
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
Page 687 and 688:
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
Page 701 and 702:
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
Page 713 and 714:
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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