ControlP5 button callback runs on program launch without mouse click.

njvanbalen

ControlP5 button callback runs on program launch without mouse click.

in Contributed Library Questions • 16 days ago

I am working on a program in processing in which the user needs to enter text into a text field and click a submit button to proceed. When the submit button is pressed the text field and button are removed.

The problem that I am having is that when I launch the program the button's callback is being run without the button being pressed and removing the elements before the user has a chance to interact with them.

I could do some hacked if statement with a flag to make it ignore the first call, but I would rather it not get called at the beginning at all. Any suggestions?

Replies(1)

andreas.s..

Re: ControlP5 button callback runs on program launch without mouse click.

15 days ago

Hi, you can use a CallbackListener, see example below.

import controlP5.*;
ControlP5 cp5;
void setup() {
size(700, 400);
cp5 = new ControlP5(this);
cp5.addButton("button")
.setPosition(100, 100)
.setSize(200, 40)
.setValue(100)
.addCallback(new CallbackListener() {
public void controlEvent(CallbackEvent event) {
if (event.getAction() == ControlP5.ACTION_RELEASED) {
println("button released.");
cp5.remove(event.getController().getName());
}
}
}
);
}
void draw() {
background(0);
}
void button(float theColor) {
println("triggering button method");
}

andreas schlegel, http://www.sojamo.de

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