Bug 180645 Support set format for Date/Time type parameter.[0705]
Description: Support set format for Date/Time type parameter. Build number:2.2.0.v200704031345 Steps to reproduce: 1. New a Date report parameter. 2. Click Change... button to set format for it. Expected result: Can set format for Date/Time parameter. Actual result: Change... button is disabled. Error log:N/A
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/FormatDateTimePage.java
*            The category of the format string.
	 * @param patternStr
	 *            The pattern of the format string.
	 */
	public void setInput( String categoryStr, String patternStr )
	{
		hasLoaded = false;
		initiatePageLayout( categoryStr, patternStr );
		reLayoutSubPages( );
		updatePreview( );
		
		oldCategory = categoryStr;
		oldPattern = patternStr;
		hasLoaded = true;
		return;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.internal.ui.dialogs.IFormatPage#setPreviewText(java.lang.String)
	 */
	public void setPreviewText( String text )
	{
		setDefaultPreviewText( text );
		updatePreview( );
		return;
	}
	/**
	 * Returns the patternStr from the page.
	 */