functionview.java

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

        gbc.gridy = 1;
        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( deleteButton, gbc );
        functionButtonPanel.add( deleteButton );

        // Button: clear

        JButton clearButton = new FunctionButton( FunctionDocument.Command.CLEAR_FUNCTIONS );
        clearButton.setMnemonic( KeyEvent.VK_L );

        gbc.gridx = gridX++;
        gbc.gridy = 1;
        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( clearButton, gbc );
        functionButtonPanel.add( clearButton );

        // Button: redo

        if ( App.getInstance( ).isApplet( ) )
        {
            JComponent filler = GuiUtilities.createFiller( 8, 1 );

            gbc.gridx = gridX++;
            gbc.gridy = 1;
            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( filler, gbc );
            functionButtonPanel.add( filler );

            JButton redoButton = new FunctionButton( FunctionDocument.Command.REDO );
            redoButton.setMnemonic( KeyEvent.VK_R );

            gbc.gridx = gridX++;
            gbc.gridy = 1;
            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( redoButton, gbc );
            functionButtonPanel.add( redoButton );
        }

        // Update buttons

        FunctionButton.updateWidth( );
        updateButtons( );


        //----  Function panel

        JPanel functionPanel = new JPanel( gridBag );
        GuiUtilities.setPaddedLineBorder( functionPanel, 4 );
        functionPanel.setBackground( backgroundColour );

        int gridY = 0;

        gbc.gridx = 0;
        gbc.gridy = gridY++;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.NORTH;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets( 0, 0, 4, 0 );
        gridBag.setConstraints( functionListScrollPane, gbc );
        functionPanel.add( functionListScrollPane );

        gbc.gridx = 0;
        gbc.gridy = gridY++;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.NORTH;
        gbc.fill = GridBagConstraints.NONE;
        gbc.insets = new Insets( 0, 0, 0, 0 );
        gridBag.setConstraints( functionButtonPanel, gbc );
        functionPanel.add( functionButtonPanel );


        //----  Coordinates panel

        JPanel coordPanel = new JPanel( gridBag );
        GuiUtilities.setPaddedLineBorder( coordPanel );
        coordPanel.setBackground( backgroundColour );

        gridX = 0;

        // Label: cursor

        JLabel cursorLabel = new FLabel( CURSOR_STR );

        gbc.gridheight = 1;

        gbc.gridx = gridX++;
        gbc.gridy = 0;
        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( cursorLabel, gbc );
        coordPanel.add( cursorLabel );

        // Field: coordinates

        coordinatesField = new CoordinatesField( );

        gbc.gridx = gridX++;
        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.HORIZONTAL;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( coordinatesField, gbc );
        coordPanel.add( coordinatesField );


        //----  Interval panel

        JPanel intervalPanel = new JPanel( gridBag );
        GuiUtilities.setPaddedLineBorder( intervalPanel );
        intervalPanel.setBackground( backgroundColour );

        gridX = 0;

        // Label: x interval

        JLabel xIntervalLabel = new FLabel( X_INTERVAL_STR );

        gbc.gridx = gridX++;
        gbc.gridy = 0;
        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( xIntervalLabel, gbc );
        intervalPanel.add( xIntervalLabel );

        // Field: x lower endpoint

        xLowerEndpointField = new EndpointField( INTERVAL_EP_NUM_COLUMNS );
        xLowerEndpointField.setActionCommand( Command.SET_X_INTERVAL );
        xLowerEndpointField.addActionListener( this );

        gbc.gridx = gridX++;
        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.HORIZONTAL;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( xLowerEndpointField, gbc );
        intervalPanel.add( xLowerEndpointField );

        // Label: to, x

        JLabel xToLabel = new FLabel( TO_STR );

        gbc.gridx = gridX++;
        gbc.gridy = 0;
        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 = new Insets( 2, 1, 2, 1 );
        gridBag.setConstraints( xToLabel, gbc );
        intervalPanel.add( xToLabel );

        // Field: x upper endpoint

        xUpperEndpointField = new EndpointField( INTERVAL_EP_NUM_COLUMNS );
        xUpperEndpointField.setActionCommand( Command.SET_X_INTERVAL );
        xUpperEndpointField.addActionListener( this );

        gbc.gridx = gridX++;
        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.HORIZONTAL;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( xUpperEndpointField, gbc );
        intervalPanel.add( xUpperEndpointField );

        gridX = 0;

        // Label: y interval

        JLabel yIntervalLabel = new FLabel( Y_INTERVAL_STR );

        gbc.gridx = gridX++;
        gbc.gridy = 1;
        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( yIntervalLabel, gbc );
        intervalPanel.add( yIntervalLabel );

        // Field: y lower endpoint

        yLowerEndpointField = new EndpointField( INTERVAL_EP_NUM_COLUMNS );
        yLowerEndpointField.setActionCommand( Command.SET_Y_INTERVAL );
        yLowerEndpointField.addActionListener( this );

        gbc.gridx = gridX++;
        gbc.gridy = 1;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.LINE_START;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( yLowerEndpointField, gbc );
        intervalPanel.add( yLowerEndpointField );

        // Label: to, y

        JLabel yToLabel = new FLabel( TO_STR );

        gbc.gridx = gridX++;
        gbc.gridy = 1;
        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 = new Insets( 2, 1, 2, 1 );
        gridBag.setConstraints( yToLabel, gbc );
        intervalPanel.add( yToLabel );

        // Field: y upper endpoint

        yUpperEndpointField = new EndpointField( INTERVAL_EP_NUM_COLUMNS );
        yUpperEndpointField.setActionCommand( Command.SET_Y_INTERVAL );
        yUpperEndpointField.addActionListener( this );

        gbc.gridx = gridX++;
        gbc.gridy = 1;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        gbc.weightx = 0.0;
        gbc.weighty = 0.0;
        gbc.anchor = GridBagConstraints.LINE_START;
        gbc.fill = GridBagConstraints.HORIZONTAL;
        gbc.insets = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( yUpperEndpointField, gbc );
        intervalPanel.add( yUpperEndpointField );

        // Update interval fields

        updateIntervalFields( );


        //----  Scroll panel

        JPanel scrollPanel = new JPanel( new GridLayout( 0, 3, 1, 1 ) );
        GuiUtilities.setPaddedLineBorder( scrollPanel, 4 );
        Color scrollZoomBackgroundColour = GuiUtilities.scaleColourBrightness( backgroundColour, 0.9375f );
        scrollPanel.setBackground( scrollZoomBackgroundColour );

        scrollPanel.add( GuiUtilities.createFiller( ) );

        // Button: scroll up

        scrollPanel.add( new ScrollButton( FunctionDocument.Command.SCROLL_UP ) );

        scrollPanel.add( GuiUtilities.createFiller( ) );

        // Button: scroll left

        scrollPanel.add( new ScrollButton( FunctionDocument.Command.SCROLL_LEFT ) );

        // Button: centre on origin

        scrollPanel.add( new ScrollButton( FunctionDocument.Command.CENTRE_ON_ORIGIN ) );

        // Button: scroll right

        scrollPanel.add( new ScrollButton( FunctionDocument.Command.SCROLL_RIGHT ) );

        scrollPanel.add( GuiUtilities.createFiller( ) );

        // Button: scroll down

        scrollPanel.add( new ScrollButton( FunctionDocument.Command.SCROLL_DOWN ) );


        //----  X zoom panel

        JPanel xZoomPanel = new JPanel( gridBag );
        xZoomPanel.setBackground( backgroundColour );

        gridX = 0;

        // Label: x zoom

        JLabel xZoomLabel = new FLabel( X_ZOOM_STR );

        gbc.gridx = gridX++;
        gbc.gridy = 0;
        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( xZoomLabel, gbc );
        xZoomPanel.add( xZoomLabel );

        // Panel: x zoom buttons

        JPanel xZoomButtonPanel = new JPanel( new GridLayout( 1, 0, 4, 0 ) );
        GuiUtilities.setPaddedLineBorder( xZoomButtonPanel, 4 );
        xZoomButtonPanel.setBackground( scrollZoomBackgroundColour );

        xZoomButtonPanel.add( new ZoomButton( FunctionDocument.Command.X_ZOOM_IN ) );
        xZoomButtonPanel.add( new ZoomButton( FunctionDocument.Command.X_ZOOM_OUT ) );

        gbc.gridx = gridX++;
        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 = AppConstants.COMPONENT_INSETS;
        gridBag.setConstraints( xZoomButtonPanel, gbc );
        xZoomPanel.add( xZoomButtonPanel );

        // Combo box: x zoom factor

        xZoomFactorComboBox = new FComboBox( ZOOM_FACTOR_STRS );
        xZoomFactorComboBox.setSelectedItem( xZoomFactorStr );
        xZoomFactorComboBox.setActionCommand( Command.SELECT_X_ZOOM_FACTOR );
        xZoomFactorComboBox.addActionListener( this );