Bug 177438 Accessibility : Preferences Dialog UI has problems in High Contrast Mode on SLED 10
Build ID: 3.2.2 Steps To Reproduce: 1.Set the OS in high contrast Mode 2.Set Font size of Application font to Sans 28 3.Restart platform 4. Bring up Preferences in Eclipse and notice that UI is not displayed completely. More information:
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
* @since 3.1
	 */
	public void removePageChangedListener(IPageChangedListener listener) {
		pageChangedListeners.remove(listener);
		
	}
	/**
     * Notifies any selection changed listeners that the selected page
     * has changed.
     * Only listeners registered at the time this method is called are notified.
     *
     * @param event a selection changed event
     *
     * @see IPageChangedListener#pageChanged
     * 
     * @since 3.1
     */
    protected void firePageChanged(final PageChangedEvent event) {
        Object[] listeners = pageChangedListeners.getListeners();
        for (int i = 0; i < listeners.length; i++) {
            final IPageChangedListener l = (IPageChangedListener) listeners[i];
            SafeRunnable.run(new SafeRunnable() {
                public void run() {
                    l.pageChanged(event);
                }
            });
        }
    }	
}