Bug 153387 Database item can't be dragged and dropped onto editor field
Steps to reproduce: 1.Start up BIRT in Mac OS X; 2.File->New->Project; 3.File->New->Report Design; 4.In Data Explorer, create a New Data Source, and choose "Classic Models Inc. Sample DataBase", press "Next" and then press "finish"; 5.In Data Explorer, create a New Data Set, press "Next"; 6.In the popup window, expand the "CLASSICMODELS", select and drag a item onto the editor field at right side.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
} );
	}
	/**
	 * 
	 * @param viewer
	 */
	private final void attachMenus( SourceViewer viewer )
	{
		StyledText widget = viewer.getTextWidget( );
		TextMenuManager menuManager = new TextMenuManager( viewer );
		widget.setMenu( menuManager.getContextMenu( widget ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.datatools.connectivity.oda.design.internal.ui.DataSetWizardPageCore#refresh(org.eclipse.datatools.connectivity.oda.design.DataSetDesign)
	 */
	protected void refresh( DataSetDesign dataSetDesign )
	{
		DEFAULT_MESSAGE = JdbcPlugin.getResourceString( "dataset.editor.page.query" );
		setMessage( DEFAULT_MESSAGE );
		refreshPage( );
		prepareUI( );
	}
	
	/*
	 * @see org.eclipse.jface.dialogs.DialogPage#setVisible(boolean)
	 */
	public void setVisible( boolean visible )
	{