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Marsh0

15

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Joined: 18th Mar 2009

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Posted: 3rd Oct 2009 19:43

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I know that this has been discussed many times. I was recently reading the chatbox thread about it but it did not come up with a solution that i needed.

I have my code, it will currently remove 1 character from my text as it is supposed to. The only problem is that when i start typing again the value immeditly goes back to my Dbentry. I am not sure how i would set this up so that i get a value with the values removed. But when i start typing it starts from where i left off. Sorry it is kind of a confusing question. Here is my code i hope you guys can help me. I dont want text highlighting or anything else. Just to remove the characters.

+ Code Snippet

// Make Text White
dbInk(dbRgb(255,255,255),0); 


// If input has been received
	if( dbScanCode() > 0 )
	{
		chatinput = dbEntry();
		iLength = strlen(chatinput); chatinput[iLength - backspace] = '\0';
		
	}

	


// Backspace
if( dbKeyState( 14 ) == 1 )
	{		
		//dbClearEntryBuffer ( ) ;
		backspace++;
	}

dbText(45,514,chatinput);

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Marsh0

15

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Joined: 18th Mar 2009

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Posted: 4th Oct 2009 09:25

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No one?

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dark coder

21

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Joined: 6th Oct 2002

Location: Japan

Posted: 4th Oct 2009 11:04 Edited at: 4th Oct 2009 11:04

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Snippet from my function library:

+ Code Snippet

void Keyboard::AddEntry( std::string& input, u32 maxLen )
{
	u32 entrySize = entry.length();
	for ( u32 i = 0; i < entrySize; i++ )
	{
		c8 thisChar = entry[i];
		if ( thisChar == 8 ) // Backspace
		{
			if ( input.length() )
				input.erase( input.end() - 1 );
		}
		else
		{
			if ( thisChar > 31 && thisChar < 127 && input.length() < maxLen ) // Valid chars
				input.push_back( thisChar );
		}
	}
}
void Keyboard::Update()
{
	// Find keyboard entry
	entry.clear();
	c8* rawEntry = dbEntry();
	dbClearEntryBuffer();
	if ( rawEntry )
	{
		entry = rawEntry;
		delete [] rawEntry;
	}
	// snip
}

In that code, 'entry' is a std::string, and all of my basic types use typedefs to make them shorter, though it should be fairly obvious what they all are. In case it's not obvious you pass a string to AddEntry() and it adds the entry buffer to this string, but not directly, it goes through every character and removes one if it's a backspace or adds it if it's otherwise valid.

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Marsh0

15

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Joined: 18th Mar 2009

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Posted: 4th Oct 2009 19:49 Edited at: 4th Oct 2009 19:54

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Sorry i am very new to c++, the code you provided is amazing but perhaps you could explain it a bit more to a novice like myself.

I got it to compile and i am calling it. But how do i get the value with the backspaces removed? None of your code has a return in it? Should i simply add a return? or how would i go about this? I tried adding a return but all i got was as single charactar at a time.

Sorry i am pretty much a newb to c++.

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Marsh0

15

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Joined: 18th Mar 2009

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Posted: 6th Oct 2009 08:44

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bump...

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dark coder

21

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Joined: 6th Oct 2002

Location: Japan

Posted: 6th Oct 2009 09:43

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The string passed to the function is a reference, so it modifies the input.

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