RadioButtonGroup.java

package com.lucasdnd.ags.ui;

import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.state.StateBasedGame;

import com.lucasdnd.ags.system.ResourceLoader;

public class RadioButtonGroup extends UIComponent {
	
	String title;
	RadioButton[] radioButtons;
	final float lineHeight = 32f;
	
	public RadioButtonGroup (String title, float xPos, float yPos, RadioButton[] radioButtons) {
		
		this.title = title;
		this.radioButtons = radioButtons;
		this.xPos = xPos;
		this.yPos = yPos;
		
		// Position of the Radio Buttons
		for (int i = 0; i < radioButtons.length; i++) {
			radioButtons[i].setxPos(this.xPos);
			radioButtons[i].setyPos(this.yPos + lineHeight * (i + 1));
		}
	}
	
	public void update(boolean leftMouseClicked, int mouseX, int mouseY) throws SlickException {
		
		// When clicked, unselect all of them, then select the one that was clicked
		boolean anyRadioButtonsClicked = false;
		for (RadioButton rb: radioButtons) {
			if (rb.gotLeftClicked(leftMouseClicked, mouseX, mouseY) && rb.isEnabled()) {
				anyRadioButtonsClicked = true;
			}
		}
		
		if (anyRadioButtonsClicked) {
			
			// Set a selected one
			RadioButton selectedRadioButton = null;
			for (RadioButton rb : radioButtons) {
				if (rb.gotLeftClicked(leftMouseClicked, mouseX, mouseY) && rb.isEnabled()) {
					rb.setSelected(true);
					selectedRadioButton = rb;
				}
			}
			
			// Disable the others
			for (RadioButton rb : radioButtons) {
				if (rb != selectedRadioButton) {
					rb.setSelected(false);
				}
			}
		}
	}
	
	public void render (GameContainer container, StateBasedGame game, Graphics g) throws SlickException {
		
		ResourceLoader.getInstance().tinyLightGrayFont.drawString(xPos + 1f, yPos + 1f, title);
		ResourceLoader.getInstance().tinyBlackFont.drawString(xPos, yPos, title);
		
		for (RadioButton rb : radioButtons) {
			rb.render(container, game, g);
		}
	}
	
	/**
	 * Returns the selected RadioButton
	 * @return
	 */
	public RadioButton getSelected() {
		for (RadioButton rb : radioButtons) {
			if (rb.isSelected()) {
				return rb;
			}
		}
		return null;
	}
	
	/**
	 * Returns the index of the selected RadioButton
	 * @return
	 */
	public int getSelectedIndex() {
		for (int i = 0; i < radioButtons.length; i++) {
			if (radioButtons[i].isSelected()) {
				return i;
			}
		}
		return -1;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public RadioButton[] getRadioButtons() {
		return radioButtons;
	}

	public void setRadioButtons(RadioButton[] radioButtons) {
		this.radioButtons = radioButtons;
	}
}