Implementation of right indentation in a text editor

**sukanyarn** · 23rd September 2006, 07:28

Hi,

I am trying to implement indent left feature in a text editor. ( I am using Qt 3.3.2 ).
I have implemented it, but it is dead slow.
I tried implementing this feature in 3 ways.

1.
With the help of getSelection I get the paraFrom and paraTo.
I take one line ( para ) at a time. Process it. I.e, removing required blank spaces.
And then, remove that para ( the old one with blank spaces ) and insert a new one with insertPara .

Efficiency : very very poor

2. I used cursor and keyboard actions using moveCursor and doKeyboardActions function.
And tried to removing blank spaces directly hence avoiding insertPara and removePara functions

Efficiency : very poor

3. I get the selected text, process it, set it back using insert command ( instead of doing line by line).
Efficiency : poor

Now, i wonder how can i make it efficient!
Thanks in advance.

**jacek** · 23rd September 2006, 16:44

How about just adding <p align="right"> and </p> around selected paragraph?

**sunil.thaha** · 25th September 2006, 06:47

Is it slow even after turning off the SyntaxHighlighting ??

**sukanyarn** · 25th September 2006, 11:34

Hi,
Acutally i am trying to implement indent left.
Without Syntax highlighter also , it is dead slow.
It is not because of syntax highlighter, it is becasue of string manipulations.
plus setting the text back to the text editor once the text is manipulated.
As i told before i tried using keyboard actions and move cursor in order to skip setting back the text to the editor. It is even slower.

**sukanyarn** · 25th September 2006, 11:37

Hi,
Thanks for the reply. I guess u mean to say to use SetAlignment function?
I feel Alignment is different from indenting. I can not use left align to indent left to the desired spaces ( set in tab ).