Border painting components as part of the border?
I wonder, if anyone knows about limitations or tricks on using Swing components as part of a border. While this worked quite well with a JLabel (the label's paint will be called when painting the border), using a JPanel instead seems not to work (the panel's children don't get painted, and the panel's position is off).
The following resembles the paint routine as used for a JLabel within a border:
publicvoid paintBorder(Component c, Graphics g,int x,int y,int width,int height){
g.setColor(c1);
g.drawRect(x, y, width - 1, height - 1);
g.setColor(c2);
g.fillRect(x + 1, y + 1, width - 2, label.getPreferredSize().height + 10);
Graphics g2 = g.create(x + 10, y + 5, width - 15, label.getPreferredSize().height);
label.setBounds(x + 10, y + 5, width - 15, label.getPreferredSize().height - 1);
label.paint(g2);
}
Any idea why JPanel doesn't work using the same approach?
Thanks.
# 1
Try this class on for size. I believe the difference is with the SwingUtilities.paintComponent method, that handles the painting of the added component rather than doing it manually. It does the painting alright but I believe it has a few bugs you can work out.
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class ComponentTitledBorder implements Border, MouseListener, SwingConstants{
int offset = 5;
Component comp;
JComponent container;
Rectangle rect;
Border border;
public ComponentTitledBorder(Component comp, JComponent container, Border border){
this.comp = comp;
this.container = container;
this.border = border;
container.addMouseListener(this);
}
public boolean isBorderOpaque(){
return true;
}
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height){
Insets borderInsets = border.getBorderInsets(c);
Insets insets = getBorderInsets(c);
int temp = (insets.top-borderInsets.top)/2;
border.paintBorder(c, g, x, y+temp, width, height-temp);
Dimension size = comp.getPreferredSize();
rect = new Rectangle(offset, 0, size.width, size.height);
SwingUtilities.paintComponent(g, comp, (Container)c, rect);
}
public Insets getBorderInsets(Component c){
Dimension size = comp.getPreferredSize();
Insets insets = border.getBorderInsets(c);
insets.top = Math.max(insets.top, size.height);
return insets;
}
private void dispatchEvent(MouseEvent me){
if(rect!=null && rect.contains(me.getX(), me.getY())){
Point pt = me.getPoint();
pt.translate(-offset, 0);
comp.setBounds(rect);
comp.dispatchEvent(new MouseEvent(comp, me.getID()
, me.getWhen(), me.getModifiers()
, pt.x, pt.y, me.getClickCount()
, me.isPopupTrigger(), me.getButton()));
if(!comp.isValid())
container.repaint();
}
}
public void mouseClicked(MouseEvent me){
dispatchEvent(me);
}
public void mouseEntered(MouseEvent me){
dispatchEvent(me);
}
public void mouseExited(MouseEvent me){
dispatchEvent(me);
}
public void mousePressed(MouseEvent me){
dispatchEvent(me);
}
public void mouseReleased(MouseEvent me){
dispatchEvent(me);
}
}
ICE
