package uk.co.wingpath.modbusgui; import java.awt.*; import java.awt.event.*; import javax.swing.*; import uk.co.wingpath.gui.*; import uk.co.wingpath.modbus.*; import uk.co.wingpath.event.Event; public class ExceptionField extends WAbstractComponent { private final JPanel panel; private final JLabel field; private final JButton button; private final Action helpAction; private ModbusException value; private final HelpViewer helpViewer; private String helpId; public ExceptionField (StatusBar statusBar, String label, final HelpViewer helpViewer) { this.helpViewer = helpViewer; value = null; helpId = null; panel = new JPanel (); panel.setLayout (new BoxLayout (panel, BoxLayout.X_AXIS)); String exampleLine = "This_is_an_example_line_that_is_45_chars_long
"; field = new JLabel ("" + exampleLine + exampleLine + exampleLine); Dimension minSize = field.getMinimumSize (); field.setPreferredSize (minSize); field.setMaximumSize (minSize); panel.add (field); setText (); helpAction = new AbstractAction ("Error Help") { public void actionPerformed (ActionEvent e) { Event.checkIsEventDispatchThread (); if (helpViewer != null && helpId != null) helpViewer.viewError (helpId); } }; helpAction.putValue (Action.SHORT_DESCRIPTION, "Get help on this error message"); panel.getActionMap ().put ("error_help", helpAction); button = new JButton (helpAction); button.setRequestFocusEnabled (false); panel.add (button); panel.setPreferredSize ( new Dimension (minSize.width + 2, minSize.height + 2)); setValue (null); initialize (panel, label); } private void setText () { String msg = ""; if (value != null) { int error = value.getErrorCode (); String explanation = value.getExplanation (); if (value.isResponse ()) { msg = "Error response " + error + ": " + Modbus.getErrorMessage (error); } else { if (error == Modbus.ERROR_NONE) { msg = "OK"; } else if (error == Modbus.ERROR_TIMED_OUT && explanation != null && explanation.equals ("Timed out")) { msg = "Timed out"; } else { msg = value.getMessage (); } } } String [] lines = msg.split ("\n"); msg = ""; for (int i = 0 ; i < lines.length ; i++) { if (i != 0) msg += "
"; msg += lines [i]; } if (lines.length == 1) msg += "
 "; field.setText (msg); } public ModbusException getValue () { return value; } public void setValue (ModbusException value) { this.value = value; panel.removeAll (); panel.add (field); setText (); InputMap inputMap = panel.getInputMap (JComponent.WHEN_IN_FOCUSED_WINDOW); if (value != null && value.getHelpId () != null) { helpId = value.getHelpId (); panel.add (button); inputMap.put (KeyStroke.getKeyStroke (KeyEvent.VK_F4, 0), "error_help"); } else { helpId = null; inputMap.remove (KeyStroke.getKeyStroke (KeyEvent.VK_F4, 0)); } panel.revalidate (); panel.repaint (); } public void setValue (ModbusException value, boolean isError) { setValue (value); if (isError) { field.setOpaque (true); field.setBackground (Gui.COLOUR_BACKGROUND_ERROR); } else { field.setOpaque (false); field.setBackground (Gui.COLOUR_BACKGROUND_INACTIVE); } } }