How can I implement a scrolling text ticker?

Question

How can I implement a right-to-left scrolling text ticker in libGDX (like stock tickers)?

Answer 1

Assuming that you can draw a string on the screen, to implement a ticker, you can simply draw only part of the string. For example:

string myString = "My large text to display";

When you are drawing it, simply draw part of it depending on a value you update every frame:

int strPointer = 0;
string myTickerString = "";

void update() {
    strPointer++;
    myTickerString = myString.Substring(strPointer, MAX_STRING_SIZE);
}

Now myTickerString will contain part of your original string, that every frame loses one letter and displays the rest of the string with a maximum size of MAX_STRING_SIZE (The size you choose).

Please note I'm not very familiar with libgdx, but this method should work with any library. For this reason the code is C#/Pseudocode. Also note you can add some delay to how quickly the text scrolls, by tweaking how often strPointer increments itself.