import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Point;
import java.awt.Component;
import java.awt.Dimension;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.UIManager;
import javax.swing.border.AbstractBorder;
import javax.swing.border.Border;
public class LabledBorder extends AbstractBorder {
private static final long serialVersionUID = 1304141032602452712L;
protected JLabel label;
protected Border border;
protected int titlePosition;
protected int titleJustification;
protected Font titleFont;
protected Color titleColor;
protected int formattedWidth;
protected int formattedHeight;
private Point textLoc = new Point();
static public final int DEFAULT_POSITION = 0;
static public final int ABOVE_TOP = 1;
static public final int TOP = 2;
static public final int BELOW_TOP = 3;
static public final int ABOVE_BOTTOM = 4;
static public final int BOTTOM = 5;
static public final int BELOW_BOTTOM = 6;
static public final int DEFAULT_JUSTIFICATION = 0;
static public final int LEFT = 1;
static public final int CENTER = 2;
static public final int RIGHT = 3;
static public final int LEADING = 4;
static public final int TRAILING = 5;
// Space between the border and the component's edge
static protected final int EDGE_SPACING = 2;
// Space between the border and text
static protected final int TEXT_SPACING = 2;
// Horizontal inset of text that is left or right justified
static protected final int TEXT_INSET_H = 5;
public LabledBorder(JLabel label) { this(null, label, LEADING, TOP); }
public LabledBorder(Border border) { this(border, null, LEADING, TOP); }
public LabledBorder(Border border, JLabel label) { this(border, label, LEADING, TOP); }
public LabledBorder(Border border, JLabel label, int titleJustification, int titlePosition) {
this.label = label;
this.border = border;
setTitleJustification(titleJustification);
setTitlePosition(titlePosition);
}
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
Border border = getBorder();
if (label == null || label.getText().equals("")) {
if (border != null) {
border.paintBorder(c, g, x, y, width, height);
}
return;
}
Rectangle grooveRect = new Rectangle(x + EDGE_SPACING, y + EDGE_SPACING, width - (EDGE_SPACING * 2), height - (EDGE_SPACING * 2));
int labelHeight = label.getPreferredSize().height;
int labelWidth = label.getPreferredSize().width + (TEXT_SPACING * 2);
int descent = labelHeight/2;
int ascent = labelHeight/2;
int diff;
Insets insets;
if (border != null) insets = border.getBorderInsets(c);
else insets = new Insets(0, 0, 0, 0);
int titlePos = getTitlePosition();
switch (titlePos) {
case ABOVE_TOP:
diff = ascent + descent + (Math.max(EDGE_SPACING, TEXT_SPACING * 2) - EDGE_SPACING);
grooveRect.y += diff;
grooveRect.height -= diff;
textLoc.y = grooveRect.y - (descent + TEXT_SPACING);
break;
case TOP:
case DEFAULT_POSITION:
diff = Math.max(0, ((ascent/2) + TEXT_SPACING) - EDGE_SPACING);
grooveRect.y += diff;
grooveRect.height -= diff;
textLoc.y = (grooveRect.y - descent) + (insets.top + ascent + descent)/2;
break;
case BELOW_TOP:
textLoc.y = grooveRect.y + insets.top + ascent + TEXT_SPACING;
break;
case ABOVE_BOTTOM:
textLoc.y = (grooveRect.y + grooveRect.height) - (insets.bottom + descent + TEXT_SPACING);
break;
case BOTTOM:
grooveRect.height -= labelHeight/2;
textLoc.y = ((grooveRect.y + grooveRect.height) - descent) + ((ascent + descent) - insets.bottom)/2;
break;
case BELOW_BOTTOM:
grooveRect.height -= labelHeight;
textLoc.y = grooveRect.y + grooveRect.height + ascent + TEXT_SPACING;
break;
}
int justification = getTitleJustification();
if(c.getComponentOrientation().isLeftToRight()) {
if(justification==LEADING || justification==DEFAULT_JUSTIFICATION) justification = LEFT;
else if(justification==TRAILING) justification = RIGHT;
}
else {
if(justification==LEADING || justification==DEFAULT_JUSTIFICATION) justification = RIGHT;
else if(justification==TRAILING) justification = LEFT;
}
switch (justification) {
case LEFT: textLoc.x = grooveRect.x + TEXT_INSET_H + insets.left; break;
case RIGHT: textLoc.x = (grooveRect.x + grooveRect.width) - (labelWidth + TEXT_INSET_H + insets.right); break;
case CENTER: textLoc.x = grooveRect.x + ((grooveRect.width - labelWidth) / 2); break;
}
if (border != null) {
if (((titlePos == TOP || titlePos == DEFAULT_POSITION) && (grooveRect.y > textLoc.y - ascent)) || (titlePos == BOTTOM && (grooveRect.y + grooveRect.height < textLoc.y + descent))) {
Rectangle clipRect = new Rectangle();
Rectangle saveClip = g.getClipBounds();
clipRect.setBounds(saveClip);
if (computeIntersection(clipRect, x, y, textLoc.x-1-x, height)) {
g.setClip(clipRect);
border.paintBorder(c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
clipRect.setBounds(saveClip);
if (computeIntersection(clipRect, textLoc.x+labelWidth+1, y, x+width-(textLoc.x+labelWidth+1), height)) {
g.setClip(clipRect);
border.paintBorder(c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
if (titlePos == TOP || titlePos == DEFAULT_POSITION) {
clipRect.setBounds(saveClip);
if (computeIntersection(clipRect, textLoc.x-1, textLoc.y+descent, labelWidth+2, y+height-textLoc.y-descent)) {
g.setClip(clipRect);
border.paintBorder(c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
}
else {
clipRect.setBounds(saveClip);
if (computeIntersection(clipRect, textLoc.x-1, y, labelWidth+2, textLoc.y - ascent - y)) {
g.setClip(clipRect);
border.paintBorder(c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
}
g.setClip(saveClip);
}
else border.paintBorder(c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
label.setSize(label.getPreferredSize());
g.translate(textLoc.x + TEXT_SPACING, textLoc.y - ascent);
label.paint(g);
g.translate(-x - (textLoc.x + TEXT_SPACING), -y - (textLoc.y - ascent));
}
public Insets getBorderInsets(Component c) {
return getBorderInsets(c, new Insets(0, 0, 0, 0));
}
public Insets getBorderInsets(Component c, Insets insets) {
FontMetrics fm;
int descent = 0;
int ascent = 16;
int height = 16;
Border border = getBorder();
if (border != null) {
if (border instanceof AbstractBorder) ((AbstractBorder)border).getBorderInsets(c, insets);
else {
Insets i = border.getBorderInsets(c);
insets.top = i.top;
insets.right = i.right;
insets.bottom = i.bottom;
insets.left = i.left;
}
}
else insets.left = insets.top = insets.right = insets.bottom = 0;
insets.left += EDGE_SPACING + TEXT_SPACING;
insets.right += EDGE_SPACING + TEXT_SPACING;
insets.top += EDGE_SPACING + TEXT_SPACING;
insets.bottom += EDGE_SPACING + TEXT_SPACING;
if(c == null || getLabel() == null || getLabel().getText().equals("")) return insets;
Font font = getFont(c);
fm = c.getFontMetrics(font);
if(fm != null) {
descent = fm.getDescent();
ascent = fm.getAscent();
height = fm.getHeight();
}
switch (getTitlePosition()) {
case ABOVE_TOP:
insets.top += ascent + descent + (Math.max(EDGE_SPACING, TEXT_SPACING*2) - EDGE_SPACING);
break;
case TOP:
case DEFAULT_POSITION:
insets.top += ascent + descent;
break;
case BELOW_TOP:
insets.top += ascent + descent + TEXT_SPACING;
break;
case ABOVE_BOTTOM:
insets.bottom += ascent + descent + TEXT_SPACING;
break;
case BOTTOM:
insets.bottom += ascent + descent;
break;
case BELOW_BOTTOM:
insets.bottom += height;
break;
}
return insets;
}
public boolean isBorderOpaque() { return false; }
public JLabel getLabel() { return label; }
public Border getBorder() {
Border b = border;
if (b == null) b = UIManager.getBorder("TitledBorder.border");
return b;
}
public int getTitlePosition() { return titlePosition; }
public int getTitleJustification() { return titleJustification; }
public void setLabel(JLabel label) { this.label = label; }
public void setBorder(Border border) { this.border = border; }
public void setTitlePosition(int titlePosition) {
switch (titlePosition) {
case ABOVE_TOP:
case TOP:
case BELOW_TOP:
case ABOVE_BOTTOM:
case BOTTOM:
case BELOW_BOTTOM:
case DEFAULT_POSITION: this.titlePosition = titlePosition; break;
default: throw new IllegalArgumentException(titlePosition + " is not a valid title position.");
}
}
public void setTitleJustification(int titleJustification) {
switch (titleJustification) {
case DEFAULT_JUSTIFICATION:
case LEFT:
case CENTER:
case RIGHT:
case LEADING:
case TRAILING: this.titleJustification = titleJustification; break;
default: throw new IllegalArgumentException(titleJustification + " is not a valid title justification.");
}
}
public Dimension getMinimumSize(Component c) {
Insets insets = getBorderInsets(c);
Dimension minSize = new Dimension(insets.right+insets.left, insets.top+insets.bottom);
switch (titlePosition) {
case ABOVE_TOP:
case BELOW_BOTTOM: minSize.width = Math.max(label.getPreferredSize().width, minSize.width); break;
case BELOW_TOP:
case ABOVE_BOTTOM:
case TOP:
case BOTTOM:
case DEFAULT_POSITION:
default: minSize.width += label.getPreferredSize().width;
}
return minSize;
}
protected Font getFont(Component c) {
Font font;
if(label != null && (font = label.getFont()) != null) return font;
if (c != null && (font = c.getFont()) != null) return font;
return new Font("Dialog", Font.PLAIN, 12);
}
private static boolean computeIntersection(Rectangle dest, int rx, int ry, int rw, int rh) {
int x1 = Math.max(rx, dest.x);
int x2 = Math.min(rx + rw, dest.x + dest.width);
int y1 = Math.max(ry, dest.y);
int y2 = Math.min(ry + rh, dest.y + dest.height);
dest.x = x1;
dest.y = y1;
dest.width = x2 - x1;
dest.height = y2 - y1;
if (dest.width <= 0 || dest.height <= 0) return false;
return true;
}
}
