functiondialog.java

FuncPlotter is a combined Java application and applet for displaying two-dimensional plots of explic

    }

    //------------------------------------------------------------------

    private void init( Window owner,
                       Color  colour,
                       String expression )
    {

        // Set icons

        if ( owner != null )
            setIconImages( owner.getIconImages( ) );


        //----  Edit panel

        GridBagLayout gridBag = new GridBagLayout( );
        GridBagConstraints gbc = new GridBagConstraints( );

        JPanel controlPanel = new JPanel( gridBag );
        GuiUtilities.setPaddedLineBorder( controlPanel );

        int gridY = 0;

        // Label: colour

        JLabel colourLabel = new FLabel( COLOUR_STR );

        gbc.gridx = 0;
        gbc.gridy = gridY;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.LINE_END;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( colourLabel, gbc );
        controlPanel.add( colourLabel );

        // Button: colour

        JPanel colourPanel = new JPanel( gridBag );

        colourButton = new JButton( new ColourSampleIcon( COLOUR_BUTTON_ICON_WIDTH,
                                                          COLOUR_BUTTON_ICON_HEIGHT ) );
        colourButton.setMargin( COLOUR_BUTTON_MARGINS );
        colourButton.setForeground( colour );
        colourButton.setActionCommand( Command.CHOOSE_COLOUR );
        colourButton.addActionListener( this );

        colourLabel.setDisplayedMnemonic( KeyEvent.VK_L );
        colourLabel.setLabelFor( colourButton );

        gbc.gridx = 0;
        gbc.gridy = gridY;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.LINE_START;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets( 0, 0, 0, 0 );
        gridBag.setConstraints( colourButton, gbc );
        colourPanel.add( colourButton );

        // Buttons: function colour

        int numFunctions = 0;
        FunctionDocument document = App.getInstance( ).getDocument( );
        if ( document != null )
            numFunctions = document.getNumFunctions( );
        if ( numFunctions > 0 )
        {
            JPanel functionColourPanel = new JPanel( new GridLayout( 1, 0, 2, 0 ) );
            functionColourButtons = new ColourButton[numFunctions];
            for ( int i = 0; i < functionColourButtons.length; ++i )
            {
                Function function = document.getFunction( i );
                functionColourButtons[i] = new ColourButton( function.getColour( ) );
                functionColourButtons[i].setToolTipText( function.getExpression( ).toString( ) );
                functionColourButtons[i].setActionCommand( Command.SET_TO_FUNCTION_COLOUR + i );
                functionColourButtons[i].addActionListener( this );
                functionColourPanel.add( functionColourButtons[i] );
            }

            gbc.gridx = 1;
            gbc.gridy = 0;
            gbc.gridwidth = 1;
            gbc.gridheight = 1;
            gbc.weightx = 0.0;
            gbc.weighty = 0.0;
            gbc.anchor = GridBagConstraints.LINE_START;
            gbc.fill = GridBagConstraints.NONE;
            gbc.insets = new Insets( 0, 6, 0, 0 );
            gridBag.setConstraints( functionColourPanel, gbc );
            colourPanel.add( functionColourPanel );
        }

        gbc.gridx = 1;
        gbc.gridy = gridY++;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.LINE_START;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( colourPanel, gbc );
        controlPanel.add( colourPanel );

        // Label: expression

        JLabel expressionLabel = new FLabel( EXPRESSION_STR );

        gbc.gridx = 0;
        gbc.gridy = gridY;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.LINE_END;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( expressionLabel, gbc );
        controlPanel.add( expressionLabel );

        // Field: expression

        expressionField = new ExpressionField( EXPRESSION_FIELD_LENGTH, expression );

        expressionLabel.setDisplayedMnemonic( KeyEvent.VK_E );
        expressionLabel.setLabelFor( expressionField );

        gbc.gridx = 1;
        gbc.gridy = gridY++;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.LINE_START;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( expressionField, gbc );
        controlPanel.add( expressionField );


        //----  Button panel: copy, paste, clear

        JPanel editButtonPanel = new JPanel( new GridLayout( 1, 0, 8, 0 ) );

        // Button: copy

        JButton copyButton = new FButton( COPY_STR );
        copyButton.setMnemonic( KeyEvent.VK_C );
        copyButton.setToolTipText( COPY_TOOL_TIP_STR );
        copyButton.setActionCommand( Command.COPY );
        copyButton.addActionListener( this );
        if ( !AppConfig.getInstance( ).hasPermissionAccessClipboard( ) )
            copyButton.setEnabled( false );
        editButtonPanel.add( copyButton );

        // Button: paste

        pasteButton = new FButton( PASTE_STR );
        pasteButton.setMnemonic( KeyEvent.VK_P );
        pasteButton.setToolTipText( PASTE_TOOL_TIP_STR );
        pasteButton.setActionCommand( Command.PASTE );
        pasteButton.addActionListener( this );
        pasteButton.setEnabled( false );
        flavorsChanged( null );
        editButtonPanel.add( pasteButton );

        // Button: clear

        JButton clearButton = new FButton( CLEAR_STR );
        clearButton.setMnemonic( KeyEvent.VK_E );
        clearButton.setToolTipText( CLEAR_TOOL_TIP_STR );
        clearButton.setActionCommand( Command.CLEAR );
        clearButton.addActionListener( this );
        editButtonPanel.add( clearButton );


        //----  Button panel: OK, cancel

        JPanel okCancelButtonPanel = new JPanel( new GridLayout( 1, 0, 8, 0 ) );

        // Button: OK

        JButton okButton = new FButton( AppConstants.OK_STR );
        okButton.setActionCommand( Command.ACCEPT );
        okButton.addActionListener( this );
        okCancelButtonPanel.add( okButton );

        // Button: cancel

        JButton cancelButton = new FButton( AppConstants.CANCEL_STR );
        cancelButton.setActionCommand( Command.CLOSE );
        cancelButton.addActionListener( this );
        okCancelButtonPanel.add( cancelButton );


        //----  Button panel

        JPanel buttonPanel = new JPanel( gridBag );
        buttonPanel.setBorder( BorderFactory.createEmptyBorder( 2, 24, 3, 24 ) );

        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.5;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.CENTER;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets( 0, 0, 0, 12 );
        gridBag.setConstraints( editButtonPanel, gbc );
        buttonPanel.add( editButtonPanel );

        gbc.gridx = 1;
        gbc.gridy = 0;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.5;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.CENTER;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets( 0, 12, 0, 0 );
        gridBag.setConstraints( okCancelButtonPanel, gbc );
        buttonPanel.add( okCancelButtonPanel );


        //----  Main panel

        JPanel mainPanel = new JPanel( gridBag );
        mainPanel.setBorder( BorderFactory.createEmptyBorder( 2, 2, 2, 2 ) );

        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.NORTH;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.insets = new Insets( 0, 0, 0, 0 );
        gridBag.setConstraints( controlPanel, gbc );
        mainPanel.add( controlPanel );

        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.NORTH;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.insets = new Insets( 4, 0, 0, 0 );
        gridBag.setConstraints( buttonPanel, gbc );
        mainPanel.add( buttonPanel );


        //----  Window

        // Set content pane

        setContentPane( mainPanel );

        // Set orientation of components according to locale

        App.applyOrientationByLocale( this );

        // Add key commands to action map

        KeyAction.create( mainPanel, JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, KEY_COMMANDS, this );

        // Add clipboard flavor listener

        try
        {
            getToolkit( ).getSystemClipboard( ).addFlavorListener( this );
        }
        catch ( Exception e )
        {
            // ignore
        }

        // Dispose of window explicitly

        setDefaultCloseOperation( DO_NOTHING_ON_CLOSE );

        // Handle window closing

        addWindowListener( new WindowEventHandler( ) );

        // Prevent dialog from being resized

        setResizable( false );

        // Resize dialog to its preferred size

        pack( );

        // Set location of dialog box

        if ( location == null )
            location = GuiUtilities.getComponentLocation( this, owner );
        setLocation( location );

        // Set default button

        getRootPane( ).setDefaultButton( okButton );

        // Set focus

        expressionField.requestFocusInWindow( );

        // Show dialog

        setVisible( true );

    }

    //------------------------------------------------------------------

    private void validateValues( )
        throws AppException
    {
        try
        {
            expressionField.getExpression( );
        }
        catch ( Expression.Exception e )
        {
            expressionField.requestFocusInWindow( );
            expressionField.setCaretPosition( e.getPos( ) );
            throw e;
        }
    }

    //------------------------------------------------------------------

    private void doChooseColour( )
    {
        Color colour = JColorChooser.showDialog( this, COLOUR_TITLE_STR, colourButton.getForeground( ) );
        if ( colour != null )
            colourButton.setForeground( colour );
    }

    //------------------------------------------------------------------

    private void doSetToFunctionColour( String str )
    {
        colourButton.setForeground( functionColourButtons[Integer.parseInt( str )].getForeground( ) );
    }

    //------------------------------------------------------------------

    private void doCopy( )
    {
        try
        {
            try
            {
                StringSelection selection = new StringSelection( expressionField.getText( ) );
                getToolkit( ).getSystemClipboard( ).setContents( selection, selection );
            }
            catch ( IllegalStateException e )
            {
                throw new AppException( ErrorId.CLIPBOARD_UNAVAILABLE, e );
            }
        }
        catch ( AppException e )
        {
            JOptionPane.showMessageDialog( this, e, App.SHORT_NAME + " : " + CLIPBOARD_ERROR_STR,
                                           JOptionPane.ERROR_MESSAGE );
        }
    }

    //------------------------------------------------------------------

    private void doPaste( )
    {
        try
        {
            try
            {
                expressionField.setText( (String)getToolkit( ).getSystemClipboard( ).getContents( this ).
                                                            getTransferData( DataFlavor.stringFlavor ) );
            }
            catch ( IllegalStateException e )
            {
                throw new AppException( ErrorId.CLIPBOARD_UNAVAILABLE, e );
            }
            catch ( UnsupportedFlavorException e )
            {
                throw new AppException( ErrorId.NO_TEXT_ON_CLIPBOARD );
            }
            catch ( IOException e )
            {
                throw new AppException( ErrorId.FAILED_TO_GET_CLIPBOARD_DATA, e );
            }
        }
        catch ( AppException e )
        {
            JOptionPane.showMessageDialog( this, e, App.SHORT_NAME + " : " + CLIPBOARD_ERROR_STR,
                                           JOptionPane.ERROR_MESSAGE );
        }
    }

    //------------------------------------------------------------------

    private void doClear( )
    {
        expressionField.setText( null );
    }

    //------------------------------------------------------------------

    private void doAccept( )
    {
        try
        {
            validateValues( );
            accepted = true;
            doClose( );
        }
        catch ( AppException e )
        {
            JOptionPane.showMessageDialog( this, e, App.SHORT_NAME + " : " + SYNTAX_ERROR_STR,
                                           JOptionPane.ERROR_MESSAGE );
        }
    }

    //------------------------------------------------------------------

    private void doClose( )
    {
        try
        {
            getToolkit( ).getSystemClipboard( ).removeFlavorListener( this );
        }
        catch ( Exception e )
        {
            // ignore
        }
        location = getLocation( );
        setVisible( false );
        dispose( );
    }

    //------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////
//  Class variables
////////////////////////////////////////////////////////////////////////

    private static  Point   location;

////////////////////////////////////////////////////////////////////////
//  Instance variables
////////////////////////////////////////////////////////////////////////

    private ExpressionField expressionField;
    private JButton         colourButton;
    private ColourButton[]  functionColourButtons;
    private JButton         pasteButton;
    private boolean         accepted;

}

//----------------------------------------------------------------------