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MatteBorder.java
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1998-06-30
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/*
* @(#)MatteBorder.java 1.10 98/02/24
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package com.sun.java.swing.border;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Component;
import java.awt.Color;
import com.sun.java.swing.Icon;
/**
* A class which provides a matte-like border of either a solid color
* or a tiled icon.
* <p>
* Warning: serialized objects of this class will not be compatible with
* future swing releases. The current serialization support is appropriate
* for short term storage or RMI between Swing1.0 applications. It will
* not be possible to load serialized Swing1.0 objects with future releases
* of Swing. The JDK1.2 release of Swing will be the compatibility
* baseline for the serialized form of Swing objects.
*
* @version 1.10 02/24/98
* @author Amy Fowler
*/
public class MatteBorder extends EmptyBorder
{
protected Color color;
protected Icon tileIcon;
/**
* Creates a matte border with the specified insets and color.
* @param top the top inset of the border
* @param left the left inset of the border
* @param bottom the bottom inset of the border
* @param right the right inset of the border
*/
public MatteBorder(int top, int left, int bottom, int right, Color color) {
super(top, left, bottom, right);
this.color = color;
}
/**
* Creates a matte border with the specified insets and tile icon.
* @param top the top inset of the border
* @param left the left inset of the border
* @param bottom the bottom inset of the border
* @param right the right inset of the border
* @param tileIcon the icon to be used for tiling the border
*/
public MatteBorder(int top, int left, int bottom, int right, Icon tileIcon) {
super(top, left, bottom, right);
this.tileIcon = tileIcon;
}
/**
* Creates a matte border with the specified tile icon. The
* insets will be calculated dynamically based on the size of
* the tile icon, where the top and bottom will be equal to the
* tile icon's height, and the left and right will be equal to
* the tile icon's width.
* @param tileIcon the icon to be used for tiling the border
*/
public MatteBorder(Icon tileIcon) {
this(-1,-1,-1,-1, tileIcon);
}
/**
* Paints the matte border.
*/
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
Insets insets = getBorderInsets(c);
Color oldColor = g.getColor();
g.translate(x, y);
// If the tileIcon failed loading, paint as gray.
if (tileIcon != null) {
color = (tileIcon.getIconWidth() == -1) ? Color.gray : null;
}
if (color != null) {
g.setColor(color);
g.fillRect(0, 0, width - insets.right, insets.top);
g.fillRect(0, insets.top, insets.left, height - insets.top);
g.fillRect(insets.left, height - insets.bottom, width - insets.left, insets.bottom);
g.fillRect(width - insets.right, 0, insets.right, height - insets.bottom);
} else if (tileIcon != null) {
int tileW = tileIcon.getIconWidth();
int tileH = tileIcon.getIconHeight();
int xpos, ypos, startx, starty;
Graphics cg;
// Paint top matte edge
cg = g.create();
cg.setClip(0, 0, width, insets.top);
for (ypos = 0; insets.top - ypos > 0; ypos += tileH) {
for (xpos = 0; width - xpos > 0; xpos += tileW) {
tileIcon.paintIcon(c, cg, xpos, ypos);
}
}
cg.dispose();
// Paint left matte edge
cg = g.create();
cg.setClip(0, insets.top, insets.left, height - insets.top);
starty = insets.top - (insets.top%tileH);
startx = 0;
for (ypos = starty; height - ypos > 0; ypos += tileH) {
for (xpos = startx; insets.left - xpos > 0; xpos += tileW) {
tileIcon.paintIcon(c, cg, xpos, ypos);
}
}
cg.dispose();
// Paint bottom matte edge
cg = g.create();
cg.setClip(insets.left, height - insets.bottom, width - insets.left, insets.bottom);
starty = (height - insets.bottom) - ((height - insets.bottom)%tileH);
startx = insets.left - (insets.left%tileW);
for (ypos = starty; height - ypos > 0; ypos += tileH) {
for (xpos = startx; width - xpos > 0; xpos += tileW) {
tileIcon.paintIcon(c, cg, xpos, ypos);
}
}
cg.dispose();
// Paint right matte edge
cg = g.create();
cg.setClip(width - insets.right, insets.top, insets.right, height - insets.top - insets.bottom);
starty = insets.top - (insets.top%tileH);
startx = width - insets.right - ((width - insets.right)%tileW);
for (ypos = starty; height - ypos > 0; ypos += tileH) {
for (xpos = startx; width - xpos > 0; xpos += tileW) {
tileIcon.paintIcon(c, cg, xpos, ypos);
}
}
cg.dispose();
}
g.translate(-x, -y);
g.setColor(oldColor);
}
/**
* Returns the insets of the border.
* @param c the component for which this border insets value applies
*/
public Insets getBorderInsets(Component c) {
if (tileIcon != null && top == -1 && bottom == -1 && left == -1 && right == -1) {
int w = tileIcon.getIconWidth();
int h = tileIcon.getIconHeight();
return new Insets(h,w,h,w);
}
return new Insets(top, left, bottom, right);
}
/**
* Returns whether or not the border is opaque.
*/
public boolean isBorderOpaque() {
// If a tileIcon is set, then it may contain transparent bits
return color != null;
}
}