PanelUiFactory.java

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 * Copyright (c) 2016
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 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
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package jsettlers.main.swing.lookandfeel.factory;

import java.awt.Graphics2D;

import javax.swing.JComponent;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.PanelUI;

import jsettlers.main.swing.lookandfeel.DrawHelper;
import jsettlers.main.swing.lookandfeel.ELFStyle;
import jsettlers.main.swing.lookandfeel.ui.UIDefaults;

/**
 * Panel UI factory
 * 
 * @author Andreas Butti
 */
public final class PanelUiFactory {

	/**
	 * Transparent panel
	 */
	private static final PanelUI DEFAULT_PANEL = new PanelUI() {
		@Override
		public void installUI(JComponent c) {
			super.installUI(c);
			c.setOpaque(false);
		}
	};

	/**
	 * Half transparent dark panel
	 */
	private static final PanelUI DARK_PANEL = new PanelUI() {
		@Override
		public void installUI(JComponent c) {
			super.installUI(c);
			c.setOpaque(false);
		}

		@Override
		public void paint(java.awt.Graphics g1, JComponent c) {
			Graphics2D g = DrawHelper.enableAntialiasing(g1);

			g.setColor(UIDefaults.HALFTRANSPARENT_BLACK);
			int arc = 15;
			g.fillRoundRect(0, 0, c.getWidth(), c.getHeight(), arc, arc);
		};
	};

	/**
	 * Supports transparent background colors
	 */
	private static final PanelUI DRAW_PANEL_TRANSPARENT_BACKGROUND = new PanelUI() {
		@Override
		public void installUI(JComponent c) {
			super.installUI(c);
			c.setOpaque(false);
		}

		@Override
		public void paint(java.awt.Graphics g, JComponent c) {
			g.setColor(c.getBackground());
			g.fillRect(0, 0, c.getWidth(), c.getHeight());
		};
	};

	/**
	 * This is only a factory so no objects need to be created.
	 */
	private PanelUiFactory() {
	}

	/**
	 * Create PLAF
	 * 
	 * @param c
	 *            Component which need the UI
	 * @return UI
	 */
	public static ComponentUI createUI(JComponent c) {
		if (ELFStyle.PANEL_DARK == c.getClientProperty(ELFStyle.KEY)) {
			return DARK_PANEL;
		}

		if (ELFStyle.PANEL_DRAW_BG_CUSTOM == c.getClientProperty(ELFStyle.KEY)) {
			return DRAW_PANEL_TRANSPARENT_BACKGROUND;
		}

		return DEFAULT_PANEL;
	}
}