Developing Software for Symbian OS: An Introduction to by Steve Babin

By Steve Babin

The general target of this publication is to supply introductory insurance of Symbian OS and get builders who've very little wisdom of Symbian OS constructing as quick as attainable. * a transparent and concise textual content on how Symbian OS structure works and the middle programming concepts and ideas had to be a great, efficient Symbian programmer * indicates how Symbian OS structure and programming compares with different cellular working structures (to aid transition and for greater realizing) * presents a number of examples and additional descriptions for parts such a lot tough for brand spanking new programmers who're surprising to the original OS structure * includes many guidance and strategies documented simply, up in the past, through scattered white papers and newsgroup threads * Describes many information of internal operations of Symbian OS, focusing particularly on these had to develop into a reliable programmer The e-book will hide improvement starting from low-level approach programming to finish person GUI purposes. It additionally covers the improvement and packaging instruments, in addition to supplying a few unique reference and examples for key APIs.

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Extra resources for Developing Software for Symbian OS: An Introduction to Creating Smartphone Applications in C++

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0). It is certainly possible, once you know the issues involved, to cleanly switch between the SDKs. Refer to the Switching Between SDKs section in Chapter 5 for information on this. com or the various Symbian support SIMPLE EXAMPLE APPLICATION 31 newsgroups. It’s quite likely that someone else will have run into the issue you are having. 3 Simple Example Application This section walks through a simple example of a Symbian OS GUI application, from source code to execution. The example is presented for Series 60, UIQ, and Series 80 smartphones.

The emulator is a Windows application that implements a smartphone entirely in software – complete with simulated buttons and display. This allows you to run and debug Symbian OS software on your PC as opposed to running on a real device. Why do this? • You avoid having to download your code to the smartphone for each code/compile/debug iteration. • You can take advantage of the debugging support the emulator has, including single stepping and watch points. The emulator simulates the actual smartphone fairly well, with some differences that I will discuss in more detail in Chapter 5.

Although, for this example, I have put all the classes in one header file, it is common to separate each class into its own header file. h that corresponds to your platform. 4 Resource File Now, let’s create the resource file to define the UI elements – in this case the menu/softkey item used to display the alert dialog. rss, and place it in the group directory. 4 shows the resource file for Series 60. 4. 5 shows the resource file for UIQ. 5. 6 shows the resource file for Series 80. 6. hrh" RESOURCE RSS_SIGNATURE { } RESOURCE TBUF r_default_document_name { buf=""; } RESOURCE EIK_APP_INFO { cba=r_simpleEx_cba; menubar = r_SimpleEx_menubar; } RESOURCE CBA r_simpleEx_cba { breadth=80; buttons= SIMPLE EXAMPLE APPLICATION 41 { CBA_BUTTON { id=ESimpleExCommand; txt="Start"; bmpfile=""; bmpid=0xffff; }, } CBA_BUTTON { txt=" "; bmpfile=""; bmpid=0xffff; }, CBA_BUTTON { txt=""; bmpfile=""; bmpid=0xffff; }, CBA_BUTTON { id=EEikCmdExit; txt="Close"; bmpfile=""; bmpid=0xffff; } }; RESOURCE MENU_BAR r_SimpleEx_menubar { titles = { MENU_TITLE { menu_pane = r_SimpleEx_menu; txt="Simple Menu"; } }; } RESOURCE MENU_PANE r_SimpleEx_menu { items = { MENU_ITEM { command = ESimpleExCommand; txt = "Start"; } }; } A resource file is a text file that defines the user interface elements of an application.

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