L

L2CAP

The Bluetooth Logical Link Control And Adaptation Protocol (L2CAP). It controls how multiple users of the link are multiplexed together, handles packet segmentation and reassembly, and conveys quality of service information.

L function
In the context of Symbian C++ programming, a function with a trailing L in its name, (for example, NewL()) such functions may leave, either directly by calling User::Leave(), or indirectly by calling other functions that may leave.
See also: leave

label
A descriptor which contains the name of a contact item field, for instance First name or Home address.
See also: descriptor, field.

label margin
Margin used for labels, normally used for paragraph style.
See also: view rectangle, line cursor margin

LAF
A Look and Feel software module provided by phone manufacturers to customise devices and user interfaces. For example, the scroll bar appearance.

landscape
Horizontal page orientation for printing.
See also: orientation, portrait

Language downgrade path
An array of up to eight languages which are used in turn to find the best matching language-specific version of a language-neutral filename.
The first language in the path is the language of the current locale. Up to the next three (at indices 1, 2 and 3) can be customised. The remaining languages in the downgrade path are based on a table of language near equivalence which is internal to Symbian.

language extension procedure
An OPX procedure written in C++ that can be called from an OPL program.
See also: OPX, OXH

large bitmap
A FBS bitmap whose size is greater than a certain threshold value, currently set at 4Kb.
See also: small bitmap.

latchable
Buttons that can latch change their state when pressed and stay in that state until changed again by the user.

latching command button
A command button that remains depressed when the pointer is removed from it.
See also: command button

latency
The time taken between the occurrence of an event and the response to it.

latitude editor
A concrete control that supports editing a latitude value.

layout co-ordinate
x,y co-ordinates whose origin is the top left hand corner of the text area.
See also: text area, window co-ordinate

layout engine
The Symbian OS text layout engine lays out editable text in a window.
See also: editable text.

layout object
Represents necessary interface between document and view.
See also: text object

LDD
A logical device driver. Part of a kernel device driver which includes the logical functions of a device e.g., on and off, and read and write. Typically, a single LDD provides functionality common to a class of hardware devices, whereas a PDD supports a specific member of that class.See also: PDD

leave
To leave, is to invoke the function User::Leave(). This causes a return to the current trap harness.
A function may also leave because a function it called left.
See also: trap harness, cleanup stack

left adjust
The number of pixels to move before displaying a character.
See also: right adjust

left text margin
The distance between the leftmost extent of a paragraph and the left edge of the text area.
An increasing left text margin width causes a scroll right to occur (text moves leftwards) and a decreasing left text margin width causes a scroll left to occur (text moves rightwards).
For an illustration of the left text margin, see Screen layout.
See also: text area, paragraph

length
The length of data currently represented by a descriptor.

line
Text Views : A line of text as seen on the view. A line is a member of just one paragraph. One paragraph may consist of many lines. Lines only apply to text that has been formatted.
ETel : A physical line from which calls are made.
See also: line capabilities, phone, call, paragraph, formatted band

line capabilities
Indicates the functionality supported by a line, as encapsulated by the Telephony Server, such as connecting to data, voice or fax calls; detecting the hook and line status, and creating calls.
See also: line

line cursor
Indicator in line cursor margin, used to indicate which line the cursor is on.
See also: line cursor margin, cursor

line cursor margin
Margin used for line cursor.
See also: view rectangle, label margin, line cursor

line primitive
A graphics operation to draw, (using the pen), a line or sequence of lines.
See also: pen, polyline, graphics operation

line status
In the context of ETel, the current status of calls on the line, e.g. dialling.

linear address
Alternative name for virtual address, the name 'linear' is historical. 'Virtual' is preferred.

list
Objects or data items connected together to form a meaningful sequence. Also known as a 'queue'.

local file system
A file system which mediates access to any devices local (non-removable) to the machine.
See also: file system

local time
See home time
See also: universal time, home time

location area code
This specifies the general location, similar to an STD code for mobile numbers.

location-based services 

long network name
Networks have both short and long names. The long name is used in preference. In Symbian OS, the long name is 16 characters.
See also: short network name

longitude editor
A concrete control which supports editing a longitude value.

low water mark
When this point is reached in a receive buffer, a flow control resume event is triggered.
See also: XON