/**
 * Copyright (C) 2001-2017 by RapidMiner and the contributors
 * 
 * Complete list of developers available at our web site:
 * 
 * http://rapidminer.com
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.look.ui;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.beans.PropertyChangeEvent;

import javax.swing.JComponent;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicFormattedTextFieldUI;

import com.rapidminer.gui.look.ClipboardActionsPopup;
import com.rapidminer.gui.look.Colors;
import com.rapidminer.gui.look.RapidLookAndFeel;


/**
 * The UI for formatted text fields.
 *
 * @author Ingo Mierswa
 */
public class FormattedTextFieldUI extends BasicFormattedTextFieldUI {

	private static class FormattedTextFieldFocusListener implements FocusListener {

		@Override
		public void focusGained(FocusEvent e) {
			((JComponent) e.getSource()).repaint();
		}

		@Override
		public void focusLost(FocusEvent e) {
			((JComponent) e.getSource()).repaint();
		}
	}

	private class FormattedTextFieldPopupListener extends MouseAdapter {

		@Override
		public void mousePressed(MouseEvent e) {
			evaluateClick(e);
		}

		@Override
		public void mouseReleased(MouseEvent e) {
			evaluateClick(e);
		}

		private void evaluateClick(MouseEvent e) {
			if (e.isPopupTrigger()) {
				showPopup(e.getPoint());
			}
		}
	}

	private ClipboardActionsPopup popup = null;

	private FormattedTextFieldPopupListener popupListener = new FormattedTextFieldPopupListener();

	private FormattedTextFieldFocusListener focusListener = new FormattedTextFieldFocusListener();

	public static ComponentUI createUI(JComponent c) {
		return new FormattedTextFieldUI();
	}

	@Override
	protected void installDefaults() {
		super.installDefaults();
		getComponent().addFocusListener(this.focusListener);
		getComponent().addMouseListener(this.popupListener);
	}

	@Override
	protected void uninstallDefaults() {
		super.installDefaults();
		getComponent().removeFocusListener(this.focusListener);
		getComponent().removeMouseListener(this.popupListener);
		this.popup = null;
	}

	@Override
	public void update(Graphics g, JComponent c) {
		super.update(g, c);
	}

	@Override
	protected void paintBackground(Graphics g) {
		Graphics2D g2 = (Graphics2D) g;
		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

		if (getComponent().isEnabled()) {
			g2.setColor(Colors.TEXTFIELD_BACKGROUND);
		} else {
			g2.setColor(Colors.TEXTFIELD_BACKGROUND_DISABLED);
		}

		g2.fillRoundRect(0, 0, getComponent().getWidth(), getComponent().getHeight(),
				RapidLookAndFeel.CORNER_DEFAULT_RADIUS, RapidLookAndFeel.CORNER_DEFAULT_RADIUS);
	}

	@Override
	public void propertyChange(PropertyChangeEvent evt) {
		super.propertyChange(evt);
	}

	private void showPopup(Point p) {
		if (!getComponent().isEnabled()) {
			return;
		}
		if (this.popup == null) {
			this.popup = new ClipboardActionsPopup(getComponent());
		}
		getComponent().requestFocus();
		this.popup.show(getComponent(), (int) p.getX(), (int) p.getY());
	}
}