package at.ac.uni_linz.tk.vchat;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.text.*;
/**
* A FocusPanel graphically displays whether it has the focus or not.
*
* @author Arno Huetter
* (C)opyright by the Institute for Computer Science, Telecooperation Department, University of Linz
*/
public class FocusPanel extends InsetsPanel {
private boolean hasFocus;
/**
* Constructs the FocusPanel.
*/
public FocusPanel() {
this(new Insets(0, 0, 0, 0));
}
/**
* Constructs the FocusPanel.
*
* @param insets the FocusPanel's Insets
*/
public FocusPanel(Insets insets) {
super(insets);
hasFocus = false;
}
/**
* Paints the FocusPanel.
*
* @param g the graphics context to use for painting
*/
public void paint(Graphics g) {
super.paint(g);
if (hasFocus) {
g.setColor(Color.black);
for (int i = 2; i < getSize().width - 2; i += 2) {
g.drawLine(i, 2, i , 2);
g.drawLine(i, getSize().height - 2, i , getSize().height - 2);
}
for (int i = 2; i < getSize().height - 2; i+=2) {
g.drawLine(2, i, 2, i);
g.drawLine(getSize().width - 2, i, getSize().width - 2 , i);
}
}
}
/**
* Requests that the FocusPanel gets the focus.
*/
public void requestFocus() {
if (!hasFocus) {
hasFocus = true;
repaint();
}
}
/**
* Transfers the focus to the next component.
*/
public void transferFocus() {
if (hasFocus) {
hasFocus = false;
repaint();
}
}
/**
* Returns true if the FocusPanel has the focus.
*/
public boolean hasFocus() {
return hasFocus;
}
}
