gtkscrollbar.java

Skin Look And Feel 1.2.10, 给你的java程序换肤, 支持大量通用皮肤文件.

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package com.l2fprod.gui.plaf.skin.impl.gtk;

import com.l2fprod.gui.plaf.skin.DefaultButton;
import com.l2fprod.gui.plaf.skin.SkinScrollbar;
import com.l2fprod.gui.plaf.skin.impl.AbstractSkinScrollbar;
import com.l2fprod.gui.plaf.skin.impl.gtk.parser.GtkParser;
import com.l2fprod.util.ImageUtils;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Rectangle;

import javax.swing.JComponent;
import javax.swing.JScrollBar;
import javax.swing.SwingConstants;

/**
 * @author    $Author: l2fprod $
 * @created   27 avril 2002
 * @version   $Revision: 1.3 $, $Date: 2003/12/06 21:48:36 $
 */
final class GtkScrollbar extends AbstractSkinScrollbar implements SkinScrollbar, SwingConstants {

  DefaultButton h_track, v_track;
  DefaultButton h_thumb, v_thumb;

  DefaultButton h_handle, v_handle;

  ArrowButton up, down, left, right;

  Dimension minimumThumbSize;

  /**
   * Constructor for the GtkScrollbar object
   *
   * @param parser         Description of Parameter
   * @exception Exception  Description of Exception
   */
  public GtkScrollbar(GtkParser parser) throws Exception {
    h_thumb = GtkUtils.newButton(parser, "GtkScrollbar",
        new String[]{"function", "detail", "orientation", "state"},
        new String[]{"BOX", "slider", "HORIZONTAL", "NORMAL"}, false, true, true);
    v_thumb = GtkUtils.newButton(parser, "GtkScrollbar",
        new String[]{"function", "detail", "orientation"},
        new String[]{"BOX", "slider", "VERTICAL"}, false, true, true);

    h_track = GtkUtils.newButton(parser, "GtkScrollbar",
        new String[]{"function", "detail", "orientation"},
        new String[]{"BOX", "trough", "HORIZONTAL"}, false, true, true);

    v_track = GtkUtils.newButton(parser, "GtkScrollbar",
        new String[]{"function", "detail", "orientation"},
        new String[]{"BOX", "trough", "VERTICAL"}, false, true, true);

    h_handle = GtkUtils.newButton(parser, "default",
        new String[]{"function", "orientation"},
        new String[]{"HANDLE", "HORIZONTAL"}, true, true);
    if (h_handle != null) {
      h_handle.setCenterFill(ImageUtils.PAINT_STRETCH);
    }

    v_handle = GtkUtils.newButton(parser, "default",
        new String[]{"function", "orientation"},
        new String[]{"HANDLE", "VERTICAL"}, true, true);
    if (v_handle != null) {
      v_handle.setCenterFill(ImageUtils.PAINT_STRETCH);
    }

    up = new ArrowButton(parser, "UP");
    down = new ArrowButton(parser, "DOWN");
    left = new ArrowButton(parser, "LEFT");
    right = new ArrowButton(parser, "RIGHT");

    minimumThumbSize = new Dimension(h_thumb.getInsets().left + (h_handle != null ? h_handle.getWidth() : 0) + h_thumb.getInsets().right,
        v_thumb.getInsets().top + (v_handle != null ? v_handle.getHeight() : 0) + v_thumb.getInsets().bottom);
  }

  /**
   * Gets the PreferredSize attribute of the GtkScrollbar object
   *
   * @param scrollbar  Description of Parameter
   * @return           The PreferredSize value
   */
  public Dimension getPreferredSize(JScrollBar scrollbar) {
    return (scrollbar.getOrientation() == JScrollBar.VERTICAL)
        ? new Dimension(Math.max(10, Math.min(up.getWidth(), v_thumb.getWidth())), 48)
        : new Dimension(48, Math.max(10, Math.min(left.getHeight(), h_thumb.getHeight())));
  }

  /**
   * Gets the MinimumThumbSize attribute of the GtkScrollbar object
   *
   * @return   The MinimumThumbSize value
   */
  public Dimension getMinimumThumbSize() {
    return minimumThumbSize;
  }

  /**
   * Gets the ArrowPreferredSize attribute of the GtkScrollbar object
   *
   * @param direction  Description of Parameter
   * @return           The ArrowPreferredSize value
   */
  public Dimension getArrowPreferredSize(int direction) {
    switch (direction) {
      case NORTH:
        return up.getPreferredSize();
      case SOUTH:
        return down.getPreferredSize();
      case WEST:
        return left.getPreferredSize();
      case EAST:
        return right.getPreferredSize();
      default:
        throw new Error("Invalid direction " + direction);
    }
  }

  /**
   * Description of the Method
   *
   * @return   Description of the Returned Value
   */
  public boolean status() {
    return true;
  }

  /**
   * Description of the Method
   *
   * @param c  Description of Parameter
   * @return   Description of the Returned Value
   */
  public boolean installSkin(JComponent c) {
    return true;
  }

  /**
   * Description of the Method
   *
   * @param g          Description of Parameter
   * @param b          Description of Parameter
   * @param direction  Description of Parameter
   * @return           Description of the Returned Value
   */
  public boolean paintArrow(java.awt.Graphics g, javax.swing.AbstractButton b, int direction) {
    switch (direction) {
      case NORTH:
        up.paint(g, b);
        break;
      case SOUTH:
        down.paint(g, b);
        break;
      case WEST:
        left.paint(g, b);
        break;
      case EAST:
        right.paint(g, b);
    }
    return true;
  }

  // track is under thumb
  /**
   * Description of the Method
   *
   * @param g            Description of Parameter
   * @param scrollbar    Description of Parameter
   * @param trackBounds  Description of Parameter
   * @return             Description of the Returned Value
   */
  public boolean paintTrack(Graphics g, JScrollBar scrollbar, Rectangle trackBounds) {
    if (h_track != null) {
      if (scrollbar.getOrientation() == HORIZONTAL) {
        h_track.paint(g, 0, 0, trackBounds.width, trackBounds.height, scrollbar);
      }
      else {
        v_track.paint(g, 0, 0, trackBounds.width, trackBounds.height, scrollbar);
      }
      return true;
    }
    return false;
  }

  // thumb is the variable area
  /**
   * Description of the Method
   *
   * @param g            Description of Parameter
   * @param scrollbar    Description of Parameter
   * @param thumbBounds  Description of Parameter
   * @return             Description of the Returned Value
   */
  public boolean paintThumb(Graphics g, JScrollBar scrollbar, Rectangle thumbBounds) {
    // the UI translate the graphics to thumbBounds.x and .y
    if (h_thumb != null) {
      if (scrollbar.getOrientation() == HORIZONTAL) {
        h_thumb.paint(g, 0, 0, thumbBounds.width, thumbBounds.height, scrollbar);
        // paint the handle only if there is room for it
        if (h_handle != null && h_handle.getWidth() < thumbBounds.width) {
          h_handle.paint(g, Math.max(0, (thumbBounds.width - h_handle.getWidth()) / 2),
              (thumbBounds.height - h_handle.getHeight()) / 2,
              Math.min(thumbBounds.width, h_handle.getWidth()),
              h_handle.getHeight(), scrollbar);
        }
      }
      else {
        v_thumb.paint(g, 0, 0, thumbBounds.width, thumbBounds.height, scrollbar);
        // paint the handle only if there is room for it
        if (v_handle != null && v_handle.getHeight() < thumbBounds.height) {
          v_handle.paint(g, (thumbBounds.width - v_handle.getWidth()) / 2,
              Math.max(0, (thumbBounds.height - v_handle.getHeight()) / 2),
              v_handle.getWidth(),
              Math.min(thumbBounds.height, v_handle.getHeight()), scrollbar);
        }
      }
      return true;
    }
    return false;
  }

}