Application: gvSIG desktop » gvSIG tools: ToolBox

package es.unex.sextante.gui.toolbox;

import java.awt.Component;

import java.awt.Graphics;

import javax.swing.ImageIcon;

import javax.swing.JComponent;

import javax.swing.JScrollPane;

import javax.swing.JViewport;

public class TransparentScrollPane

         extends

            JScrollPane {

   ImageIcon image = null;

   public TransparentScrollPane(final Component view,

                                final int vsbPolicy,

                                final int hsbPolicy) {

      super(view, vsbPolicy, hsbPolicy);

      if (view instanceof JComponent) {

         ((JComponent) view).setOpaque(false);

      }

      this.setOpaque(false);

      this.getViewport().setOpaque(false);

   }

   public TransparentScrollPane(final Component view) {

      this(view, VERTICAL_SCROLLBAR_AS_NEEDED, HORIZONTAL_SCROLLBAR_AS_NEEDED);

   }

   public TransparentScrollPane(final int vsbPolicy,

                                final int hsbPolicy) {

      this(null, vsbPolicy, hsbPolicy);

   }

   public TransparentScrollPane() {

      this(null, VERTICAL_SCROLLBAR_AS_NEEDED, HORIZONTAL_SCROLLBAR_AS_NEEDED);

   }

   @Override

   public void paintComponent(final Graphics g) {

      if (image != null) {

        g.setColor(this.getBackground());

        g.fillRect(0, 0, this.getWidth(), this.getHeight());

         final int h = image.getIconHeight();

         final int w = image.getIconWidth();

         g.drawImage(image.getImage(), getWidth() - w, getHeight() - h, null, null);

         getViewport().setScrollMode(JViewport.BLIT_SCROLL_MODE);

      }

      super.paintComponent(g);

   }

   public void setBackgroundImage(final ImageIcon image) {

      this.image = image;

   }

}