GuiRadioButton.java

package pneumaticCraft.client.gui.widget;

import java.awt.Rectangle;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.gui.Gui;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.resources.I18n;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.client.FMLClientHandler;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class GuiRadioButton extends Gui implements IGuiWidget{
    public boolean checked, enabled = true;
    public int x, y, color;
    private final int id;
    public String text;
    public FontRenderer fontRenderer = FMLClientHandler.instance().getClient().fontRenderer;
    private List<String> tooltip = new ArrayList<String>();
    public List<GuiRadioButton> otherChoices;
    private IWidgetListener listener;

    private static final int BUTTON_WIDTH = 10;
    private static final int BUTTON_HEIGHT = 10;

    public GuiRadioButton(int id, int x, int y, int color, String text){
        this.id = id;
        this.x = x;
        this.y = y;
        this.color = color;
        this.text = text;
    }

    @Override
    public int getID(){
        return id;
    }

    @Override
    public void render(int mouseX, int mouseY, float partialTick){
        // drawRect(x, y, x + BUTTON_WIDTH, y + BUTTON_HEIGHT, enabled ? -6250336 : 0xFF999999);
        // drawRect(x + 1, y + 1, x + BUTTON_WIDTH - 1, y + BUTTON_HEIGHT - 1, enabled ? -16777216 : 0xFFAAAAAA);

        drawCircle(x + BUTTON_WIDTH / 2, y + BUTTON_HEIGHT / 2, BUTTON_WIDTH / 2, enabled ? -6250336 : 0xFF999999);
        drawCircle(x + BUTTON_WIDTH / 2, y + BUTTON_HEIGHT / 2, BUTTON_WIDTH / 2 - 1, enabled ? -16777216 : 0xFFAAAAAA);

        if(checked) {
            drawCircle(x + BUTTON_WIDTH / 2, y + BUTTON_HEIGHT / 2, 1, enabled ? 0xFFFFFFFF : 0xFFAAAAAA);
        }
        fontRenderer.drawString(I18n.format(text), x + 1 + BUTTON_WIDTH, y + BUTTON_HEIGHT / 2 - fontRenderer.FONT_HEIGHT / 2, enabled ? color : 0xFF888888);
    }

    private void drawCircle(int x, int y, int radius, int color){
        Tessellator t = Tessellator.instance;
        float f = (color >> 24 & 255) / 255.0F;
        float f1 = (color >> 16 & 255) / 255.0F;
        float f2 = (color >> 8 & 255) / 255.0F;
        float f3 = (color & 255) / 255.0F;
        GL11.glEnable(GL11.GL_BLEND);
        GL11.glDisable(GL11.GL_TEXTURE_2D);
        GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
        GL11.glColor4f(f1, f2, f3, f);
        t.startDrawing(GL11.GL_TRIANGLE_FAN);
        int points = 20;
        for(int i = 0; i < points; i++) {
            double sin = Math.sin((double)i / points * Math.PI * 2);
            double cos = Math.cos((double)i / points * Math.PI * 2);
            t.addVertex(x + sin * radius, y + cos * radius, zLevel);
        }
        t.draw();
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glDisable(GL11.GL_BLEND);
    }

    @Override
    public Rectangle getBounds(){
        return new Rectangle(x, y, BUTTON_WIDTH + fontRenderer.getStringWidth(text), BUTTON_HEIGHT);
    }

    @Override
    public void onMouseClicked(int mouseX, int mouseY, int button){
        if(enabled) {
            if(otherChoices != null) {
                for(GuiRadioButton radioButton : otherChoices) {
                    radioButton.checked = false;
                }
            } else {
                throw new IllegalArgumentException("A radio button needs more than one choice! You need to set the GuiRadioButton#otherChoices field!");
            }
            checked = true;
            listener.actionPerformed(this);
        }
    }

    @Override
    public void onMouseClickedOutsideBounds(int mouseX, int mouseY, int button){

    }

    public void setTooltip(String tooltip){
        setTooltip(Arrays.asList(new String[]{tooltip}));
    }

    public void setTooltip(List<String> tooltip){
        this.tooltip = tooltip;
    }

    @Override
    public void addTooltip(int mouseX, int mouseY, List<String> curTooltip, boolean shiftPressed){
        curTooltip.addAll(tooltip);
    }

    @Override
    public boolean onKey(char key, int keyCode){
        return false;
    }

    @Override
    public void setListener(IWidgetListener gui){
        listener = gui;
    }

    @Override
    public void update(){}

    @Override
    public void handleMouseInput(){}

    @Override
    public void postRender(int mouseX, int mouseY, float partialTick){

    }
}