Hi I am trying to load a new applet when the next button is pressed. The sample program below loads in a text file of 2 quotes. When the program initially starts it loads each line of the text file into an array.

It then displays the first element, or quote, of the array using the currentQuote property. What I am trying to do is load a new applet when the user clicks the next button and this will increment the currentQuote by one. I could just set the label that the quote is displayed on to blank and put the next quote on it, but I'd rather load it again (basically start a blank canvas).

Here is the code:
Code:

import processing.core.*;
import interfascia.*;
import guicomponents.*;


public class QuoteOfTheDay extends PApplet
{
  GUIController c;
  GLabel quoteLbl;
  IFButton nextButton;
  BufferedReader quoteReader;
  int numOfQuotes = 2;
  int currentQuote = 0; //could possibly be static
  String[] quotes = new String[numOfQuotes];
  String quote;
  
  public void setup()
  {
    size(800, 200);
    c = new GUIController(this);
    
    //Load the file for the quotes
    quote = dataPath("quotes.txt");
    try
    {
      quoteReader = new BufferedReader (new FileReader (quote));
      for (int i = 0; i < quotes.length; i++)
      {
        quote = quoteReader.readLine();
        quotes[i] = quote;
      }
    }
    catch (IOException e)
    {
      println ("Error reading file " + e);
    }
    
    
    //Display the quote in the label
    quoteLbl = new GLabel(this, quotes[currentQuote], 10, 10, 500, 20);
    quoteLbl.setBorder(1);
    quoteLbl.setOpaque(true);
    quoteLbl.setFont("Arial", 22);
    
    //Set up the button to display the next quote
    nextButton = new IFButton("NEXT", 100, 100);
    nextButton.addActionListener(this);
    c.add(nextButton);
  }
  
  public void draw()
  {
  }
  
  public void actionPerformed(GUIEvent e)
  {
    if (e.getSource() == nextButton)
    {
      currentQuote++;
      //println(currentQuote);
      //Clear the window and load the next quote
    }
  }
}
 

By the way this is my first post so I am a processing newbie.

Thanks for the quick reply PhiLho.

Where would I put this background() call? Or how can I call it from inside the actionPerformed function? Also I am gonna set an image for the background, i.e. background(myImage), so will this still be the same?

Ye I had a quick look at the loadStrings() function and that is a more efficient way of loading text. I was initially put off by the fact that it loads each line of text as an element of the array (this was before I was using .split()), but that is what my program is doing anyway. Note to self: check reference first.

Now:
Code:

    /*Load the file for the quotes
    quote = dataPath("quotes.txt");
    try
    {
      quoteReader = new BufferedReader (new FileReader (quote));
      for (int i = 0; i < quotes.length; i++)
      {
        quote = quoteReader.readLine();
        quotes[i] = quote;
      }
    }
    catch (IOException e)
    {
      println ("Error reading file " + e);
    }*/
 

becomes:
Code:

quotes = loadStrings("quotes.txt");
 

So much better.

Now if I can just get it to reload again and display the next quote.

Ye that works great. I had to call setup() again in the actionPerformed() function as well as backgroud(backgroundColour).

Thanks.

That makes sense.

I was trying another bit of coding (it's a bit of a mess, was in a rush so bare with me):

Code:

import processing.core.*;
import interfascia.*;
import guicomponents.*;


public class QuoteOfTheDay extends PApplet
{
  GUIController c;
  GLabel quoteLbl, languageLbl;
  IFButton nextBtn, backBtn, englishBtn, frenchBtn;
  BufferedReader quoteReader;
  int numOfQuotes = 2;
  int currentQuote = 0; //could possibly be static
  int numScreens = 0;
  boolean screenCreated = false;
  String[] quotes = new String[numOfQuotes];
  String quote;
  String choice= "";
  
  public void setup()
  { 
    size(550, 250);
    background(100);
    if (numScreens == 0)
    {
      setupHomeScreen();
    }
  }
  
  public void draw()
  {
  }
  
  public void setupHomeScreen()
  {
    c = new GUIController(this);
    
    languageLbl = new GLabel(this, "Please select English or French", 10, 10, 200, 20);
    languageLbl.setBorder(1);
    languageLbl.setOpaque(true);
    languageLbl.setFont("Arial", 22);
    
    englishBtn = new IFButton("English", 70, 100);
    englishBtn.addActionListener(this);
    c.add(englishBtn);
    frenchBtn = new IFButton("French", 200, 100);
    frenchBtn.addActionListener(this);
    c.add(frenchBtn);
    numScreens++;
  }
  
  public void setupMainScreen(String quote)
  {
    c = new GUIController(this);

    //Display the quote in the label
    quoteLbl = new GLabel(this, quote, 10, 10, 600, 20);
    quoteLbl.setBorder(1);
    quoteLbl.setOpaque(true);
    quoteLbl.setFont("Arial", 22);
    
    //Set up the button to display the next quote
    nextBtn = new IFButton("NEXT", 70, 200);
    nextBtn.addActionListener(this);
    c.add(nextBtn);
    
    //Set up the button to allow user to go back to home screen
    backBtn = new IFButton("BACK", 200, 200);
    backBtn.addActionListener(this);
    c.add(backBtn);
  }
  
  public void actionPerformed(GUIEvent e)
  {
    if (e.getSource() == englishBtn)
    {
      quotes = loadStrings("englishQuotes.txt");
      choice = "english";
      setupMainScreen(quotes[currentQuote]);
    }
    else if (e.getSource() == frenchBtn)
    {
      quotes = loadStrings("frenchQuotes.txt");
      choice = "french";
      setupMainScreen(quotes[currentQuote]);
    }
    else if (e.getSource() == nextBtn)
    {
      if (choice.equals(" english"))
      {
        currentQuote++;
        setupMainScreen(quotes[currentQuote]);
      }
      else
      {
        currentQuote++;
        setupMainScreen(quotes[currentQuote]);
      }
    }
    else if (e.getSource() == backBtn)
    {
      currentQuote = 0;
      numScreens = 0;
      setup();
    }
  }
}
 

I know there are a lot of things wrong with this. Also when I load the next screen the previous screen's buttons and label are still showing.

I tried background() in the draw() function and calling redraw() when the buttons were pressed but still no luck. I'd say it's something simple I am overlooking.