Hi,
how does a computer recognise spontaneously, when a person writes on a pen tablet/PC tablet.
Does it have to do with multi-threading concept?? ie....if a person writes a word "HAPPY", the moment he writes the character "H" and when he moves to write "A" on the pen/pc tablet,the display would have shown the character "H" or sometimes the entire word...
can anyone tell me the concept behind it??
They are called Events. When you hit a key, or press on the screen, or use a pen on a tablet. The OS triggers an event. Just google event handling and the language you want to use to get more information. Mouse moves, key presses, Mouse clicks (or screen taps) are all events that can be caught and used in some fashion.
The keyboard is the standard device used to cause computer errors!
To further spell it out, and this is highly depended on your OS/Application framework, the trick is to watch for not just a single event but a sequence of them. In your case it (the logic) might look like:Originally Posted by stumon
I mean there is a LOT more to it than this, this is not something for the beginner but this should give you a kind of idea on how the flow might work...Code:onPenDown: StartingNewLine = true; startPosition = currentPenPosition(); onPenUp: // ending line draw if ( checkForPreviousLineIntersection(currentPenPosition(), startPosition) { partOfPreviousChar = true; } else { // is part of a new character: runOCROnLastLineSet(); }
First of all thanx 4 spending time to reply my post..
I have another doubt, I tried to execute a very simple c pgm, which had no errors when executed in windows. But when i tried to execute in linux platform,there was an segementation fault....
can u plzzz help me
Leejoe, it's best if you start a new thread with this question, so it doesn't get buried in another questions discussion.
Don't be shy, and please post the program you're referring to (or the relevant portion of it). We can't comment very much on code we haven't seen.
> which had no errors when executed in windows. But when i tried to execute in linux platform,there was an segementation fault
That is all too common (for newbies).
The fact that it runs on windows just makes you lucky (if you view it that your program ran), or unlucky (if you view it that your program ran despite the errors).
Post your code, and we'll be able to tell you how to make it correct for both systems.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
