In addition, software may be available to modify or extend keyboard functionality. Often, a user can change keyboard mapping in system settings. This means that a physical keyboard may be dynamically mapped to any layout without switching hardware components-merely by changing the software that interprets the keystrokes. The OS converts the scancode into a specific binary character code using a "scancode to character" conversion table, called the keyboard mapping table. Modern computer keyboards are designed to send a scancode to the operating system (OS) when a key is pressed or released: this code reports only the key's row and column, not the specific character engraved on that key. ![]() Functional layout is the arrangement of the key-meaning association or keyboard mapping, determined in software, of all the keys of a keyboard it is this (rather than the legends) that determines the actual response to a key press. Visual layout is the arrangement of the legends (labels, markings, engravings) that appear on those keys. Physical layout is the actual positioning of keys on a keyboard. In every case, a consonant-Pulli mark combinant behaves the same way as a consonant-vowel combinant when you use the arrow, Backspace and Delete keys.A keyboard layout is any specific physical, visual or functional arrangement of the keys, legends, or key-meaning associations (respectively) of a computer keyboard, mobile phone, or other computer-controlled typographic keyboard. However, because this keyboard acts in a similar way to a typewriter, it is possible to type a preceding vowel component followed by a consonant and the Pulli mark, or even a standalone vowel followed by the Pulli mark, producing odd combinations such as மெ் or அ். Any vowel component that is typed immediately after typing the Pulli mark will not be combined with the consonant. If vowel components are typed before a consonant, they will not be combined with that consonant.īecause the consonants contain the implicit vowel அ, to produce a pure consonant it is necessary to add the Pulli mark ் by typing a semicolon immediately after the consonant. Vowel components that combine with consonants are always typed after the consonants, even when the vowel component appears before (to the left of) the consonant component (such as ெ or ே). Vowel-consonant combinant characters are entered either by typing a specific key for that combinant or by typing the consonant and vowel components separately. The standalone vowel characters which are on the keyboard will produce that character and will not combine with consonants. This is the case whether the vowel component appears to the left or right of, above or below the consonant. Moving the cursor to the left of a combinant character and pressing Delete will erase the whole character, but if you move the cursor to the right of a combinant and press Backspace, only the vowel component will be erased. ![]() This means that while two (or more) keystrokes are required to display most consonant-vowel combinants, when you use the arrow keys to move the cursor through the text, only a single keystroke is needed to move past each character. The majority of characters are typed using a combination of keystrokes.Īlthough many Tamil characters are typed using separate keys for consonants and components, the characters that appear on screen will be combinants, which the computer sees as a single character. The visible keyboard layout consists of the eighteen consonants க ங ச ஞ ட ண த ந ப ம ய ர ல வ ழ ள ற ன, the five Grantha consonants and SRii ஸ ஷ ஜ ஹ க்ஷ ஸ்ரீ, eleven vowels அ ஆ இ ஈ உ ஊ எ ஏ ஐ ஒ ஓ, a range of vowel components and combinants characters, and the Pulli ் and Aytham ஃ marks, as well as various punctuation marks.
0 Comments
Leave a Reply. |