GuiComponentTabWrapper.java

package openmods.gui.component;

import net.minecraft.client.Minecraft;
import openmods.gui.listener.IMouseDownListener;

public class GuiComponentTabWrapper extends BaseComposite {
	protected final BaseComponent mainComponent;
	protected GuiComponentTab activeTab;

	public GuiComponentTabWrapper(int x, int y, BaseComponent mainComponent) {
		super(x, y);
		this.mainComponent = mainComponent;
		addComponent(mainComponent);
	}

	@Override
	public BaseComposite addComponent(BaseComponent component) {
		super.addComponent(component);
		if (component instanceof GuiComponentTab) {
			final GuiComponentTab tab = (GuiComponentTab)component;
			component.setX(component.getX() + mainComponent.getWidth());
			component.setListener(new IMouseDownListener() {
				@Override
				public void componentMouseDown(BaseComponent component, int x, int y, int button) {
					if (activeTab != tab) {
						if (activeTab != null) activeTab.setActive(false);
						activeTab = tab;
						activeTab.setActive(true);
					} else if (activeTab != null && activeTab.isOrigin(x, y)) {
						tab.setActive(false);
						activeTab = null;
					}
				}
			});
		}
		return this;
	}

	@Override
	protected void renderComponentBackground(Minecraft minecraft, int offsetX, int offsetY, int mouseX, int mouseY) {
		realignTabsVertically();
	}

	private int realignTabsVertically() {
		int oY = mainComponent.getY() + 4;

		for (BaseComponent component : components) {
			if (component instanceof GuiComponentTab) {
				component.setY(oY);
				oY += ((GuiComponentTab)component).getHeight() - 1;
			}
		}
		return oY;
	}

	public void onTabClicked(GuiComponentTab tab) {
		if (tab != activeTab) {
			if (activeTab != null) {
				activeTab.setActive(false);
			}
			tab.setActive(true);
			activeTab = tab;
		} else {
			tab.setActive(false);
			activeTab = null;
		}
	}

	@Override
	public int getWidth() {
		int maxTabWidth = 0;
		for (BaseComponent component : components) {
			if (component.getX() + component.getWidth() > maxTabWidth) {
				maxTabWidth = component.getX() + component.getWidth();
			}
		}
		return mainComponent.getWidth() + maxTabWidth;
	}

	@Override
	public int getHeight() {
		int maxTabHeight = 0;
		for (BaseComponent component : components) {
			if (component.getY() + component.getHeight() > maxTabHeight) {
				maxTabHeight = component.getY() + component.getHeight();
			}
		}
		return mainComponent.getHeight() + maxTabHeight;
	}

}