Next line character not recognised when appendText() is used, for a text area under G4P

SKChakra

Hey!

        I have created a text area under G4P GUI builder (updated to the latest versions)...But when I append text to display on the text area, the next line character "\n" is not processed and continues to append in the same line...Code is something like this under a button event...

public void acceptLogin_click(GButton source, GEvent event){
mymonitor_textarea.appendText("Test text...\n");
}

But the string is appended immediately and not in the next line...

The output on the textArea when I click the button appears like this

Test text...Test text...Test text...

and not

Test text...
Test text...
Test text...

Any help is appreciated!

quark

Not an ideal solution but this shows how you might work round the problem

import g4p_controls.*;

GTextArea txa;
GButton btn;

void setup() {
  size(400, 400);
  txa = new GTextArea(this, 10, 10, 380, 200);
  btn = new GButton(this, 10, height-30, 100, 20, "Append Text");
  btn.addEventHandler(this, "btn_click");
}

void draw() {
  background(2540);
}

public void btn_click(GButton source, GEvent event) {
  txa.setText(txa.getText() + "\nText...");
} 

SKChakra

@quark, I tried this, the new line problem was fixed, but this rendered the text area to be unscrollable, scroll bars arent working in the textarea even though the scroll is enabled

quark

I will fix this in the next version of G4P at the moment there is no work arround. Sorry.

SKChakra

The method you suggested is spitting out nullpointer exceptions when I click the scroll bars...So setText(getText()+something) is not good for making something like a real time monitor...

quark

Sorry about that, the GTextArea control is by far the complex control to code and I know there are some issues with it. I am looking at a complete refactoring of the code for all editable text controls but this is going to take a long time before it becomes available.

SKChakra

As a workaround for those who didn't seem to overcome this issue, try this

try{
txa.setText(txa.getText() + "\nText...");
}catch(NullPointerException e){
txa.setText(txa.getText() + "\nText...");
}

This sounds dumb, but gets the job done...