JInternalFrame.java 文件源码

/**
 * Iconifies or de-iconifies this internal frame,
 * if the look and feel supports iconification.
 * If the internal frame's state changes to iconified,
 * this method fires an <code>INTERNAL_FRAME_ICONIFIED</code> event.
 * If the state changes to de-iconified,
 * an <code>INTERNAL_FRAME_DEICONIFIED</code> event is fired.
 *
 * @param b a boolean, where <code>true</code> means to iconify this internal frame and
 *          <code>false</code> means to de-iconify it
 * @exception PropertyVetoException when the attempt to set the
 *            property is vetoed by the <code>JInternalFrame</code>
 *
 * @see InternalFrameEvent#INTERNAL_FRAME_ICONIFIED
 * @see InternalFrameEvent#INTERNAL_FRAME_DEICONIFIED
 *
 * @beaninfo
 *           bound: true
 *     constrained: true
 *     description: The image displayed when this internal frame is minimized.
 */
public void setIcon(boolean b) throws PropertyVetoException {
    if (isIcon == b) {
        return;
    }

    /* If an internal frame is being iconified before it has a
       parent, (e.g., client wants it to start iconic), create the
       parent if possible so that we can place the icon in its
       proper place on the desktop. I am not sure the call to
       validate() is necessary, since we are not going to display
       this frame yet */
    firePropertyChange("ancestor", null, getParent());

    Boolean oldValue = isIcon ? Boolean.TRUE : Boolean.FALSE;
    Boolean newValue = b ? Boolean.TRUE : Boolean.FALSE;
    fireVetoableChange(IS_ICON_PROPERTY, oldValue, newValue);
    isIcon = b;
    firePropertyChange(IS_ICON_PROPERTY, oldValue, newValue);
    if (b)
      fireInternalFrameEvent(InternalFrameEvent.INTERNAL_FRAME_ICONIFIED);
    else
      fireInternalFrameEvent(InternalFrameEvent.INTERNAL_FRAME_DEICONIFIED);
}