Teleprompter / headline feed

Programming Questions

iamlukeyb

in Programming Questions • 2 years ago

Hi iam wanting to create a teleprompter with a difference i have a text file with headlines that i want displaying one at a time unless someone starts typing then i want it to get rid of info fro the txt file and then display what was written then go back to the headlines again if not in use

any help would be appriciated

Replies(2)

cedrickie..

Re: Teleprompter / headline feed

2 years ago

what did you have so far ?
a good start would be loading different lines of text from a txt file using loadString() http://processing.org/reference/loadStrings_.html

loop through the String array to display the text until someone starts to type.
if you are having problems at a certain point, just come back and ask again...

iamlukeyb

Re: Teleprompter / headline feed

2 years ago

This is the code i have so far

ArrayList<String> txt;

String source;

int lineHeight = 32;

int fontSize = 32;

int textareaWidth = 400;

int textareaHeight = 200;

void setup() {

size(600,400);

textFont(createFont("",fontSize),fontSize);

txt = new ArrayList<String>();

textLeading(lineHeight);

// make sure the following lines are in 1 line only.

source = "type here";

}

void keyPressed() {

if(key==BACKSPACE) {

if(source.length()>0) {

source = source.substring(0,source.length()-1);

}

} else {

source += key;

}

void draw() {

background(0);

translate(100,100);

calculateTextHeight(source,textareaWidth);

int maxLineNum = round(textareaHeight/lineHeight);

int offset = max(0,txt.size()-maxLineNum);

fill(255,40);

rect(0,0, textareaWidth, textareaHeight);

fill(255);

String s = "";

for(int i=offset;i<txt.size();i++) {

s += txt.get(i)+"\n";

}

text(s,0,0,textareaWidth,height);

}

// got the following function from here

// http://processing.org/discourse/yabb2/YaBB.pl?num=1195937999/0

// modified version which only breaks text into lines.

int calculateTextHeight(String theString, int theWidth) {

String[] wordsArray = split(theString, " ");

String tempString = "";

txt.clear();

for (int i=0; i < wordsArray.length; i++) {

if (textWidth(tempString + wordsArray[i]) < theWidth) {

tempString += wordsArray[i] + " ";

}

else {

txt.add(tempString.substring(0, tempString.length()-1));

tempString = wordsArray[i] + " ";

}

txt.add(tempString.substring(0, tempString.length()-1));

return(round(txt.size()*lineHeight));

}

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