/**
* Removes the component at the specified index from this popup menu.
*
* @param pos the position of the item to be removed
* @exception IllegalArgumentException if the value of <code>pos</code> < 0, or if the value of
* <code>pos</code> is greater than the number of items
*/
public void remove(int pos) {
if (pos < 0) {
throw new IllegalArgumentException("index less than zero.");
}
if (pos > getComponentCount() - 1) {
throw new IllegalArgumentException("index greater than the number of items.");
}
super.remove(pos);
}
/**
* Sets the content that the popup displays
*
* @param content A JComponent that represents the content to be displayed.
*/
public void setContent(JComponent content) {
if (content == null) {
throw new NullPointerException("Popup content must not be null");
}
// Remove the previous popup content
if (this.content != null) {
glassPane.remove(this.content);
}
// Set this content to the new content
this.content = content;
// Set the size of the content
this.content.setSize(this.content.getPreferredSize());
// Put the content into the glass pane
glassPane.add(this.content);
}
