Alright, here's the underlying issue I'm having. How can I tell if an object is being hovered over or clicked on by the mouse?
Xolkiyr wrote ...
2018/7/4
Making a clickable menu
Create, keep a reference to (add a field to hold the button object) and check for mouse clicks on the button in the class of the menu. Also, add a field in the class of the button to track which button is currently being hovered on. Basically, something like this:
/** THE MENU WORLD CLASS */
import greenfoot.*;
public class Menu extends World
{
Actor buttonA, buttonB;
public Menu
{
super(600, 400, 1);
Button.mouseOn = null; // to clear any prior menu settings
addObject(buttonA = new Button("Previous", 120, 350);
addObject(buttonB = new Button("Next", 280, 350);
}
public void act()
{
if (Greenfoot.mouseClicked(buttonA))
{
// buttonA clicked codes here
}
if (Greenfoot.mouseClicked(buttonB))
{
// buttonB clicked codes here
}
}
}
/** THE BUTTON ACTOR CLASS */
import greenfoot.*;
public class Button extends Actor
{
public static Actor mouseOn;
public Button(String caption)
{
// create button image here
}
public void act()
{
// gaining mouse hover
if (mouseOn == null && Greenfoot.mouseMoved(this))
{
mouseOn = this;
// hover gained codes here
}
// losing mouse hover
if (mouseOn == this && Greenfoot.mouseMoved(null) && !Greenfoot.mouseMoved(this))
{
mouseOn = null;
// hover lost code here
}
}
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