PageFormatDialog.java

/*
 * PageFormatDialog.java
 *
 * Created on April 20, 2007, 1:27 PM
 */

package ika.gui;

import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JComponent;
import javax.swing.KeyStroke;

/**
 * A dialog that lets the user enter a width and height value in millimeters.
 * The values are stored in the GUI - not as it should properly be done!
 * Usage: Dimension2D dim = PageFormatDialog.showDialog(null);
 * @author  Bernhard Jenny, Institute of Cartography, ETH Zurich.
 */
public class PageFormatDialog extends javax.swing.JDialog {
    
    /**
     * Each time a dialog is opened, we use this shared instance.
     */
    private static PageFormatDialog dialog = null;
    
    /**
     * Remember whether the user canceled.
     */
    private boolean abort = false;
    
    /**
     * Returns the last page format entered by the user.
     */
    public static PageFormat getPageFormat() {
        if (dialog == null || dialog.abort)
            return null;
        return dialog.pageFormatPanel.getPageFormat();
    }
    
    public static void setPageFormat(Frame ownerFrame, PageFormat pageFormat) {
        if (dialog == null)
            initDialog(ownerFrame);
        dialog.pageFormatPanel.setPageFormat(pageFormat);
    }
    
    /**
     * Shows a modal dialog and returns the dimension selected by the user
     * or null if the user cancels.
     */
    public static PageFormat showDialog(Frame ownerFrame) {
        
        if (dialog == null)
            initDialog(ownerFrame);
        
        dialog.abort = false;
        dialog.setModal(true);
        dialog.setVisible(true);
        return dialog.abort ? null : dialog.pageFormatPanel.getPageFormat();
    }

    /**
     * Shows a modal dialog and returns the dimension selected by the user
     * or null if the user cancels.
     */
    public static PageFormat showDialog(Frame ownerFrame, boolean showScale) {

        if (dialog == null)
            initDialog(ownerFrame);

        dialog.abort = false;
        dialog.pageFormatPanel.setShowScale(showScale);
        dialog.pack();
        dialog.setModal(true);
        dialog.setVisible(true);
        return dialog.abort ? null : dialog.pageFormatPanel.getPageFormat();
    }


    private static void initDialog(Frame ownerFrame) {
        if (dialog != null)
            return ;
        
        dialog = new PageFormatDialog(ownerFrame, true);
        
        // location
        java.awt.Dimension screenDim = dialog.getToolkit().getScreenSize();
        java.awt.Dimension dialogDim = dialog.getSize();
        dialog.setLocation((screenDim.width - dialogDim.width) / 2,
                (screenDim.height - dialogDim.height) / 2 );
        
        // ok button reacts on return key, cancel button on escape key.
        dialog.getRootPane().setDefaultButton(dialog.okButton);
        ActionListener l = new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                dialog.setVisible(false);
                dialog.abort = true;
            }
        };
        dialog.cancelButton.registerKeyboardAction(l, "EscapeKey",
                KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_ESCAPE,
                0 , true), JComponent.WHEN_IN_FOCUSED_WINDOW);
    }
    
    /** Creates new form PageFormatDialog */
    public PageFormatDialog(java.awt.Frame parent, boolean modal) {
        super(parent, modal);
        initComponents();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        pageFormatPanel = new ika.gui.PageFormatPanel();
        jPanel1 = new javax.swing.JPanel();
        cancelButton = new javax.swing.JButton();
        okButton = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
        setTitle("Map Scale & Size");
        setResizable(false);
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                formWindowClosing(evt);
            }
        });

        pageFormatPanel.setBorder(javax.swing.BorderFactory.createEmptyBorder(30, 30, 30, 30));
        getContentPane().add(pageFormatPanel, java.awt.BorderLayout.CENTER);

        jPanel1.setLayout(new java.awt.FlowLayout(java.awt.FlowLayout.RIGHT, 30, 20));

        cancelButton.setText("Cancel");
        cancelButton.setDefaultCapable(false);
        cancelButton.setPreferredSize(new java.awt.Dimension(90, 29));
        cancelButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cancelButtonActionPerformed(evt);
            }
        });
        jPanel1.add(cancelButton);

        okButton.setText("OK");
        okButton.setPreferredSize(new java.awt.Dimension(90, 29));
        okButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                okButtonActionPerformed(evt);
            }
        });
        jPanel1.add(okButton);

        getContentPane().add(jPanel1, java.awt.BorderLayout.SOUTH);

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void formWindowClosing(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_formWindowClosing
        dialog.setVisible(false);
        this.abort = true;
    }//GEN-LAST:event_formWindowClosing
    
    private void cancelButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_cancelButtonActionPerformed
        dialog.setVisible(false);
        this.abort = true;
    }//GEN-LAST:event_cancelButtonActionPerformed
    
    private void okButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_okButtonActionPerformed
        dialog.setVisible(false);
        this.abort = false;
    }//GEN-LAST:event_okButtonActionPerformed

    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton cancelButton;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JButton okButton;
    private ika.gui.PageFormatPanel pageFormatPanel;
    // End of variables declaration//GEN-END:variables
    
}