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
SWT.DEFAULT ).x;
		int totalWidth = sashForm.computeSize( SWT.DEFAULT, SWT.DEFAULT ).x;
		if ( (double) leftWidth / (double) totalWidth > 0.4 )
		{
			
			sashForm.setWeights( new int[]{
					40, 60
			} );
		}
		else
		{
			sashForm.setWeights( new int[]{
					leftWidth, totalWidth - leftWidth
			} );
		}
	}
	/**
	 * 
	 * @param group
	 */
	private void setupIdentifierQuoteStringCheckBox( Group group )
	{
		GridData layoutData = new GridData( GridData.FILL_HORIZONTAL );
		layoutData.horizontalSpan = 3;
		identifierQuoteStringCheckBox = new Button( group, SWT.CHECK );
		identifierQuoteStringCheckBox.setText( JdbcPlugin.getResourceString( "tablepage.button.dnd" ) ); 
		identifierQuoteStringCheckBox.setSelection( false );
		identifierQuoteStringCheckBox.setLayoutData( layoutData );
	}