¤¤¤ ¤¤¤ The plan for the training day ¤¤¤ ¤¤¤

The following list of task will take you around most of the basic concepts in Symbian.

This page is part of a one day intensive tutorial day about introduction to programming for Symbian and is not designed for self study.

¤¤¤ Group exercise: Understanding Hello World !¤¤¤

¤¤¤ 1. Using descriptors ¤¤¤

Purpose
Learning to use strings in Symbian

Task
Change the text in the Hello World box - play around with the text classes

Main Classes
TDes, TBuf, HBufC, TLex

CAknInformationNote* informationNote = new (ELeave) CAknInformationNote;
TBuf<80> text;
text.Append(_L("Hello world. The answer to your question is "));
text.AppendNum(42);
informationNote->ExecuteLD(text);

This tutorial explains the basics: NewLC tutorial

¤¤¤ 2. Change Resource names, add menu point ¤¤¤

Purpose
Learning to use resources in Symbian

Task
Change the menu in the Hello World Example, Add new menu items

Main Concept
Resources

helloworldbasic.rss

#include "HelloWorldBasic.hrh"
#include "HelloWorldBasic.loc"

RESOURCE MENU_PANE r_helloworldbasic_menu
{
items =
{
// added the new Options menu command here
MENU_ITEM
{
command = EHelloWorldBasicCommand1;
txt = qtn_hewb_command1;
},
MENU_ITEM
{
command = EAknSoftkeyExit;
txt = qtn_hewb_exit;
}
};
}

helloworldbasic.hrh

enum THelloWorldBasicIds
{
EHelloWorldBasicCommand1 = 1 // start value must not be 0
};

helloworldbasic.loc

//d:First item in "Options" menu pane, "hello" event.
#define qtn_hewb_command1 "Hello"

//d:Second item in "Options" menu pane, "exit" event.
#define qtn_hewb_exit "Exit"

¤¤¤ 3. Make new class – error handling ¤¤¤

Purpose
Be familar with error handling

Task
Make a new class with creation of additional objects

Main Classes
NewL, NewLC, ConstructL, CleanupStack, Leave, TRAP

NewLC Error Handling Tutorial Part 1
NewLC Error Handling Tutorial Part 2

¤¤¤ 4. Let it be an active object ¤¤¤

Purpose
Learning to create an Active Object

Task
Create an Active Object that displays a popup box when the timer expires.

Main Classes
Resources

Symbian Active Object

Purpose
Do something fun or something useful - getting to be more familar with Symbian

Task
a) Build a new View e.g. a control view: Purpose is to learn the view architecture
b) Build an image algorithm e.g. find the averange britness: Purpose to learn camera and images
c) Use bluetooth to connect to sensor e.g. learn more about Bluetooth, implement image processing.

Resource
Use the handed out example as a start point

¤¤¤ 5a. Build a new View ¤¤¤

CAknViewAppUi, CAknView, CCoeControl

¤¤¤ 5b. Modify image data ¤¤¤

MCameraObserver, CCamera, CFbsBitmap

¤¤¤ 5c. Modify sensor data ¤¤¤