package com.gavin.gui;

import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.Serializable;
import java.util.Vector;

import javax.swing.BorderFactory;
import javax.swing.ComboBoxModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.Icon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.ListCellRenderer;
import javax.swing.ListModel;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.border.Border;
import javax.swing.plaf.ComboBoxUI;
import javax.swing.plaf.basic.BasicComboPopup;
import javax.swing.plaf.metal.MetalComboBoxUI;

import com.gavin.gui.CustomFileChooser.ArrowIcon;
import com.gavin.gui.CustomFileChooser.MoveIcon;


@SuppressWarnings({ "rawtypes", "unchecked", "serial" })
public class CustomComboBox<E> extends JComboBox<E> {

	protected Icon arrowIcon = new ArrowIcon(16, 10, 10, 10, Color.decode("#707070"), SwingConstants.BOTTOM);

	protected Color selectionBackground;
	protected Color selectionForeground;
	protected Color popupBackground;
	protected Color popupForeground;
	protected Border popupBorder;

	public CustomComboBox() {
		super();
		init();
	}

	public CustomComboBox(ComboBoxModel<E> aModel) {
		super(aModel);
		init();
	}

	public CustomComboBox(E[] items) {
		super(items);
		init();
	}

	public CustomComboBox(Vector<E> items) {
		super(items);
		init();
	}

	public CustomComboBox(Icon arrowIcon) {
		super();
		this.arrowIcon = arrowIcon;
		init();
	}

	private void init() {

		setUI(new CustomComboBoxUI());
		setOpaque(true);
		setForeground(Color.decode("#9a9a9a"));
		setBackground(Color.WHITE);
		Border lineBorder = BorderFactory.createLineBorder(Color.decode("#c5c7c8"));
		setBorder(lineBorder);
		setFont(new Font(Font.DIALOG, Font.PLAIN, 16));
		setPopupForeground(getForeground());
		setPopupBackground(getBackground());
		setSelectionBackground(Color.LIGHT_GRAY);
		// getPopup().setOpaque(true);
		// getPopup().setBackground(popupBackground);
		setPopupBorder(lineBorder);
		setRenderer(new CustomComboBoxRenderer());
	}

	@Override
	public synchronized void addMouseListener(MouseListener l) {
		super.addMouseListener(l);
		if (getArrowButton() != null) {
			getArrowButton().addMouseListener(l);
		}
	}

	public void setSelectionBackground(Color selectionBackground) {
		this.selectionBackground = selectionBackground;
		getPopup().getList().setSelectionBackground(selectionBackground);
	}

	public void setSelectionForeground(Color selectionForeground) {
		this.selectionForeground = selectionForeground;
		getPopup().getList().setSelectionForeground(selectionForeground);
	}

	public void setPopupBackground(Color popupBackground) {
		this.popupBackground = popupBackground;
		getPopup().getList().setBackground(popupBackground);
	}

	public void setPopupForeground(Color popupForeground) {
		this.popupForeground = popupForeground;
		getPopup().getList().setForeground(popupForeground);
	}

	public void setPopupBorder(Border popupBorder) {
		this.popupBorder = popupBorder;
		getPopup().setBorder(popupBorder);
	}

	public void setArrowIcon(Icon icon) {
		this.arrowIcon = icon;
		updateUI();
	}

	@Override
	public void setUI(ComboBoxUI ui) {
		if (ui instanceof CustomComboBoxUI) {
			super.setUI(ui);
		} else {
			super.setUI(new CustomComboBoxUI());
		}
	}

	@Override
	public void updateUI() {

		setUI(new CustomComboBoxUI());

		setSelectionBackground(selectionBackground);
		setSelectionForeground(selectionForeground);
		setPopupBackground(popupBackground);
		setPopupForeground(popupForeground);
		setPopupBorder(popupBorder);

		ListCellRenderer<?> renderer = getRenderer();
		if (renderer instanceof Component) {
			SwingUtilities.updateComponentTreeUI((Component) renderer);
		}
	}

	/**
	 * 如果想将ComboBox的Background和Foreground与弹出的Popup的Background和Foreground保持一致则可以调用此方法
	 */
	public void synchGroundToPopup() {
		setPopupBackground(getBackground());
		setPopupForeground(getForeground());
	}

	/**
	 * 如果想将ComboBox的Background和Foreground和Border与弹出的Popup的Background和Foreground和Border保持一致则可以调用此方法
	 */
	public void synchAllToPopup() {
		setPopupBackground(getBackground());
		setPopupForeground(getForeground());
		setPopupBorder(getBorder());
	}

	/**
	 * 设置ComboBox的Background和Popup的Background
	 * 
	 * @param color
	 */
	public void setBackgroundAndToPopup(Color color) {
		setBackground(color);
		setPopupBackground(color);
	}

	/**
	 * 设置ComboBox的Foreground和Popup的Foreground
	 * 
	 * @param color
	 */
	public void setForegroundAndToPopup(Color color) {
		setForeground(color);
		setPopupForeground(color);
	}

	/**
	 * 设置ComboBox的Border和Popup的Border
	 * 
	 * @param border
	 */
	public void setBorderAndToPopup(Border border) {
		setBorder(border);
		setPopupBorder(border);
	}

	public Icon getArrowIcon() {
		if (arrowIcon == null) {
			arrowIcon = new ArrowIcon(16, 10, 12, 10, Color.decode("#707070"), SwingConstants.BOTTOM);
		}
		return arrowIcon;
	}

	public BasicComboPopup getPopup() {
		return ((CustomComboBoxUI) getUI()).getPopup();
	}

	public JButton getArrowButton() {
		return ((CustomComboBoxUI) getUI()).getArrowButton();
	}

	public static boolean isMenuShortcutKeyDown(InputEvent event) {
		return (event.getModifiers() & Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()) != 0;
	}

	public static class CustomList<E> extends JList<E> {

		public CustomList() {
			super();
		}

		public CustomList(E[] listData) {
			super(listData);
		}

		public CustomList(ListModel<E> dataModel) {
			super(dataModel);
		}

		public CustomList(Vector<? extends E> listData) {
			super(listData);
		}

		@Override
		public void processMouseEvent(MouseEvent e) {
			if (isMenuShortcutKeyDown(e)) {
				// Fix for 4234053. Filter out the Control Key from the list.
				// ie., don't allow CTRL key deselection.
				Toolkit toolkit = Toolkit.getDefaultToolkit();
				e = new MouseEvent((Component) e.getSource(), e.getID(), e.getWhen(), e.getModifiers() ^ toolkit.getMenuShortcutKeyMask(), e.getX(), e.getY(),
						e.getXOnScreen(), e.getYOnScreen(), e.getClickCount(), e.isPopupTrigger(), MouseEvent.NOBUTTON);
			}
			super.processMouseEvent(e);
		}
	}

	public static class CustomComboBoxUI extends MetalComboBoxUI {

		@Override
		protected JButton createArrowButton() {
			final CustomComboBox box = (CustomComboBox) comboBox;
			Icon arrowIcon = box.getArrowIcon();
			JButton button = new JButton(arrowIcon);
			button.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
			button.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
			button.setHorizontalTextPosition(SwingConstants.CENTER);
			button.setVerticalTextPosition(SwingConstants.CENTER);
			button.setRolloverEnabled(true);
			button.setFocusPainted(false);
			button.setOpaque(false);
			button.setContentAreaFilled(false);
			button.setBorderPainted(false);
			button.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 2));
			if (arrowIcon != null) {
				button.setPressedIcon(new MoveIcon(arrowIcon, 0, 1));
			}
			button.setName("ComboBox.arrowButton");
			return button;
		}

		/**
		 * Paints the currently selected item.
		 */
		@Override
		public void paintCurrentValue(Graphics g, Rectangle bounds, boolean hasFocus) {
			Component c = comboBox.getRenderer().getListCellRendererComponent(listBox, comboBox.getSelectedItem(), -1, hasFocus && !isPopupVisible(comboBox),
					false);
			c.setBackground(comboBox.getBackground());// 清除渲染器原来设置的背景色,将渲染器的背景设置成ComboBox的背景色
			c.setForeground(comboBox.getForeground());// 清除渲染器原来设置的前景色,将渲染器的前景设置成ComboBox的前景色
			if (c instanceof JComponent) {
				JComponent jc = (JComponent) c;
				jc.setOpaque(comboBox.isOpaque());
			}

			int x = bounds.x, y = bounds.y, w = bounds.width, h = bounds.height;
			if (padding != null) {
				x = bounds.x + padding.left;
				y = bounds.y + padding.top;
				w = bounds.width - (padding.left + padding.right);
				h = bounds.height - (padding.top + padding.bottom);
			}

			currentValuePane.paintComponent(g, c, comboBox, x, y, w, h, c instanceof JPanel);
		}

		/**
		 * Paints the background of the currently selected item.
		 */
		@Override
		public void paintCurrentValueBackground(Graphics g, Rectangle bounds, boolean hasFocus) {
			Color t = g.getColor();
			g.setColor(comboBox.getBackground());
			g.fillRect(bounds.x, bounds.y, bounds.width, bounds.height);
			g.setColor(t);
		}

		public BasicComboPopup getPopup() {
			return (BasicComboPopup) popup;
		}

		public JButton getArrowButton() {
			return arrowButton;
		}
	}

	public static class CustomComboBoxRenderer extends DefaultListCellRenderer implements ListCellRenderer<Object>, Serializable {

		private Border rendererBorder = BorderFactory.createEmptyBorder(0, 5, 0, 5);

		public CustomComboBoxRenderer() {
			setBorder(rendererBorder);
		}

		@Override
		public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
			super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
			setBorder(rendererBorder);
			return this;
		}

		public Border getRendererBorder() {
			return rendererBorder;
		}

		public void setRendererBorder(Border rendererBorder) {
			this.rendererBorder = rendererBorder;
		}
	}
}


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