webgis.java

来自「MapXtreme for java,MapInfo公司的地图引擎。」· Java 代码 · 共 425 行 · 第 1/2 页

            System.out.println(" ");
        }

        // Set up the applet GUI

        // Define a panel that will contain the map and the toolbar.
        // Note that we are adding the MapToolBar and VisualMapJ objects
        // to the same panel; this is important, because it allows the
        // two objects to be automatically associated with each other.
        JPanel panelMap = new JPanel();
        panelMap.setLayout(new BorderLayout());
        panelMap.add(m_mapToolBar, BorderLayout.NORTH);
        m_mapToolBar.setFloatable(false);

        // Add a Radius Select tool to the toolbar, as a demonstration
        // of how to listen for property changed events.  (We will
        // listen for real-time changes to the circle radius as the
        // user drags the mouse.)
        RadiusSelectionMapTool radius = new RadiusSelectionMapTool();
        m_mapToolBar.add(radius);

        // Add a ViewEntireLayer button to the toolbar.  The user clicks
        // the button to launch the View Entire Layer dialog.
        try {
            m_viewEntire.setVisualMapJ(m_visualMapJ);
            m_mapToolBar.add(m_viewEntire);
        } catch (Exception e) {
            //e.printStackTrace();
        }

        // For purely cosmetic reasons, we prefer to have the Layer Control
        // be the last icon on the toolbar.  Since we just added two new
        // items to the toolbar, we will take extra steps to move the
        // Layer Control to the end:
        LayerControl layercontrol = m_mapToolBar.getLayerControl();
        if (layercontrol != null) {
            m_mapToolBar.removeLayerControl(layercontrol);
            m_mapToolBar.add(layercontrol);
        }

        panelMap.add(m_visualMapJ, BorderLayout.CENTER);

        // Define a panel that will contain a zoom width text field and a
        // corresponding label, as well as a "show/hide thematic options" button
        JPanel panelOptions = new JPanel();
        panelOptions.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
        panelOptions.setLayout(new BoxLayout(panelOptions, BoxLayout.X_AXIS));

        // Add a ZoomPanel, which contains a text field where the user
        // can see or modify the map's current zoom width
        m_zoomPanel.setVisualMapJ(m_visualMapJ);
        // Place a border around the ZoomPanel to fine-tune its
        // alignment, relative to other items on the status bar
        m_zoomPanel.setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
        panelOptions.add(m_zoomPanel);

        // Add some space between the items on the status bar
        panelOptions.add(Box.createHorizontalStrut(25));

        // Add a label to display the current search radius
        m_lblRadius = new JLabel("");
        panelOptions.add(m_lblRadius);

        // Act as a listener so that whenever the user uses the Radius
        // tool, there is a notification, causing our propertyChange
        // method to be called;  there we can update the JLabel
        // that shows the current radius.
        radius.addPropertyChangeListener(this);

        panelOptions.add(Box.createHorizontalStrut(25));

        // Add a button that allows the user to show or hide the panel
        // that contains thematic shading options.
        m_btnShowHide = new JButton(">>");
        m_btnShowHide.addActionListener(this);
        panelOptions.add(m_btnShowHide);
        m_bThemesVisible = true;

        // Add the panel with the ZoomPanel, etc., to the bottom of
        // the panel that contains the map and the toolbar.
        panelMap.add(panelOptions, BorderLayout.SOUTH);

        // Define a thematic panel, which will contain an "Add Theme" button
        // and a container that we will use to display thematic legends.
        m_panelTheme = new JPanel();
        m_panelTheme.setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
        m_panelTheme.setPreferredSize(new Dimension(200, 400));
        m_panelTheme.setLayout(new BoxLayout(m_panelTheme, BoxLayout.Y_AXIS));

        // Add an Add Theme button to the upper part of the thematic panel
        m_btnAddTheme = new JButton(m_addThemeLabel);
        m_btnAddTheme.setAlignmentX(Component.CENTER_ALIGNMENT);
        m_btnAddTheme.addActionListener(this);
        m_panelTheme.add(m_btnAddTheme);

        // Add a legend container to the lower part of the thematic panel
        m_legendContainer.setBorder(BorderFactory.createEtchedBorder());
        m_legendContainer.setPreferredSize(new Dimension(180, 1500));
        JScrollPane sp = new JScrollPane(m_legendContainer);
        m_panelTheme.add(sp);

        // Add the toolbar/map/statusbar panel to the left part of the layout
        this.getContentPane().add(panelMap, BorderLayout.CENTER);

        // Add the thematic panel to the right part of the layout
        this.getContentPane().add(m_panelTheme, BorderLayout.EAST);

        try {
            m_legendContainer.setVisualMapJ(m_visualMapJ);
            m_addTheme.setVisualMapJ(m_visualMapJ);
            // Set up the applet to use remote rendering
            // (having the server render the images).
            RendererParams rParams = new RendererParams();
            rParams.setURL(m_mapxtremeURL);
            m_visualMapJ.setRendererParams(rParams);
        } catch (Exception e) {
        }

        try {
            jbInit();
        } catch (Exception e) {
            //e.printStackTrace();
        }
    }

    //Component initialization
    private void jbInit() throws Exception {

    }

    // Listen for changes to the radius in the Radius Select tool.
    public void propertyChange(PropertyChangeEvent e) {
        String propertyName = e.getPropertyName();
        if (propertyName != null) {
            // See whether user is using the Radius Select tool
            if (propertyName.startsWith("Radius")) {
                if (e.getNewValue() == null) {
                    // User must have pressed ESC key to cancel the tool
                    m_lblRadius.setText("");
                } else {
                    if (propertyName.equalsIgnoreCase("RadiusFinished")) {
                        // User has finished using the tool; clear the status bar
                        m_lblRadius.setText("");
                    } else {
                        // User is currently dragging the Radius tool...
                        Double d = (Double) e.getNewValue();
                        if (m_nf == null) {
                            m_nf = NumberFormat.getNumberInstance();
                            m_nf.setMaximumFractionDigits(3);
                            m_nf.setMinimumFractionDigits(1);
                            m_nf.setGroupingUsed(true);
                        }
                        m_lblRadius.setText(m_radiusLabel + " " + m_nf.format(d) +
                                            " " +
                                            m_visualMapJ.getMapJ().
                                            getDistanceUnits().getAbbreviation());
                    }
                }
            }
        }
    } // propertyChange method


    // Respond to the user actions, such as clicking
    // the Add Theme button.
    public void actionPerformed(ActionEvent event) {
        Object object = event.getSource();
        if (object == m_btnAddTheme) {
            // The user clicked the Add Theme button.  Invoke the Add Theme
            // wizard, unless we detect (by checking the m_bDialogActive
            // variable) that the Add Theme wizard is already being displayed.
            // (Which can happen if the user accidentally clicks the button twice.)
            if (!m_bDialogActive) {
                // The add theme dialog isn't currently active; so display it now.
                m_bDialogActive = true;
                m_addTheme.actionPerformed(null);
                m_bDialogActive = false;
            }
        } else if (object == m_btnShowHide) {
            // The user clicked the button that shows or hides the themes panel.
            // Show or hide the themes panel, and reset the button caption.
            if (m_bThemesVisible) {
                m_btnShowHide.setText("<<");
            } else {
                m_btnShowHide.setText(">>");
            }
            m_bThemesVisible = !m_bThemesVisible;
            m_panelTheme.setVisible(m_bThemesVisible);
        }
    }


    //Get Applet information
    public String getAppletInfo() {
        return "Applet Information";
    }

    //Get parameter info
    public String[][] getParameterInfo() {
        return null;
    }

    //static initializer for setting look & feel
    static {
        try {
            //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            //UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) {
        }
    }
}