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What value does a button return? What are the commands to use this value?
Can somebody please help me?
A button (or any G4P control) does not return values rather they generate events which you must catch to execute some code.
In this example there 2 buttons which make an ellipse either bigger or smaller depending on which one you click.
import g4p_controls.*; GButton btnSmaller, btnBigger; float dx, dy; void setup() { size(480, 320); dx = width/4; dy = height/4; // Create 2 buttons on the main sketch window // x y w h face text btnSmaller = new GButton(this, 160, 10, 60, 30, "Smaller"); btnBigger = new GButton(this, 260, 10, 60, 30, "Bigger"); } void draw() { background(200, 180, 255); // Draw elipse in centre of the screen stroke(128, 0, 0); strokeWeight(3); fill(192, 64, 64); ellipse(width/2, height/2, dx, dy); } void handleButtonEvents(GButton button, GEvent event) { // Clicked on 'bigger' if (button == btnBigger && event == GEvent.CLICKED) { dx += 10; // make ellispe bigger dy += 10; } // Clicked on 'smaller' if (button == btnSmaller && event == GEvent.CLICKED) { dx -= 10; // make ellispe smaller dy -= 10; } }
Answers
Can somebody please help me?
A button (or any G4P control) does not return values rather they generate events which you must catch to execute some code.
In this example there 2 buttons which make an ellipse either bigger or smaller depending on which one you click.