plaintextexportdialog.java

来自「swing编写的库存管理程序。毕业设计类」· Java 代码 · 共 1,075 行 · 第 1/3 页

   * Returns the lines-per-inch setting.
   *
   * @return The lines-per-inch setting.
   */
  public int getLinesPerInch()
  {
    final Integer i = (Integer) cbLinesPerInch.getSelectedItem();
    if (i == null)
    {
      return LPI_6.intValue();
    }
    return i.intValue();
  }

  /**
   * Sets the lines per inch.
   *
   * @param i  the lines per inch.
   */
  public void setLinesPerInch(final int i)
  {
    if (i == LPI_10.intValue() || i == LPI_6.intValue())
    {
      cbLinesPerInch.setSelectedItem(new Integer(i));
    }
    else
    {
      throw new IllegalArgumentException();
    }
  }

  /**
   * Returns the characters-per-inch setting.
   *
   * @return The characters-per-inch setting.
   */
  public int getCharsPerInch()
  {
    final Integer i = (Integer) cbCharsPerInch.getSelectedItem();
    if (i == null)
    {
      return CPI_10.intValue();
    }
    return i.intValue();
  }

  /**
   * Sets the characters per inch.
   *
   * @param i  the characters per inch.
   */
  public void setCharsPerInch(final int i)
  {
    if (i == CPI_10.intValue() || i == CPI_12.intValue()
        || i == CPI_15.intValue()
        || i == CPI_17.intValue()
        || i == CPI_20.intValue())
    {
      cbCharsPerInch.setSelectedItem(new Integer(i));
    }
    else
    {
      throw new IllegalArgumentException();
    }
  }

  /**
   * Returns the encoding.
   *
   * @return The encoding.
   */
  public String getEncoding()
  {
    if (cbEncoding.getSelectedIndex() == -1)
    {
      if (selectedEncodingModel.getSize() > 0)
      {
        // return the first selected encoding, unless specified otherwise.
        return selectedEncodingModel.getEncoding(0);
      }
      return PlainTextOutputTarget.getTextTargetEncoding(null);
    }
    else
    {
      return selectedEncodingModel.getEncoding(cbEncoding.getSelectedIndex());
    }
  }

  /**
   * Sets the encoding.
   *
   * @param encoding  the encoding.
   */
  public void setEncoding(final String encoding)
  {
    if (encoding == null)
    {
      throw new NullPointerException("Encoding must not be null");
    }

    if (cbEncoding.getModel() != selectedEncodingModel)
    {
      throw new IllegalStateException("Model for the combobox is not set up correctly.");
    }

    ensureEncodingAvailable(plainTextCommandSet, plainTextEncodingModel, encoding);
    ensureEncodingAvailable(ibmPrinterCommandSet, ibmPrinterEncodingModel, encoding);
    ensureEncodingAvailable(epsonPrinterCommandSet, epsonPrinterEncodingModel, encoding);

    if (selectedEncodingModel.indexOf(encoding) == -1)
    {
      throw new IllegalStateException("This encoding is not known.");
    }

    final int ibmIndex = ibmPrinterEncodingModel.indexOf(encoding);
    final int epsonIndex = epsonPrinterEncodingModel.indexOf(encoding);
    final int plainIndex = plainTextEncodingModel.indexOf(encoding);

    if (ibmIndex >= 0)
    {
      ibmPrinterEncodingModel.setSelectedIndex(ibmIndex);
      if (ibmPrinterEncodingModel.getSelectedIndex() == -1)
      {
        throw new IllegalStateException("Unable to select encoding for IBM model.");
      }
    }
    if (plainIndex >= 0)
    {
      plainTextEncodingModel.setSelectedIndex(plainIndex);
      if (plainTextEncodingModel.getSelectedIndex() == -1)
      {
        throw new IllegalStateException("Unable to select encoding for plain text model.");
      }
    }
    if (epsonIndex >= 0)
    {
      epsonPrinterEncodingModel.setSelectedIndex(epsonIndex);
      if (epsonPrinterEncodingModel.getSelectedIndex() == -1)
      {
        throw new IllegalStateException("Unable to select encoding for epson model.");
      }
    }
    final int selectedIndex = selectedEncodingModel.indexOf(encoding);
    final Object o = cbEncoding.getModel().getElementAt(selectedIndex);
    cbEncoding.setSelectedItem(o);

  }

  /**
   * Initialises the PDF save dialog from the settings in the report configuration.
   *
   * @param config  the report configuration.
   */
  public void initFromConfiguration(final ReportConfiguration config)
  {
    setEncoding(config.getConfigProperty
        (PlainTextOutputTarget.TEXT_OUTPUT_ENCODING,
            PlainTextOutputTarget.TEXT_OUTPUT_ENCODING_DEFAULT));
    try
    {
      setLinesPerInch(StringUtil.parseInt(config.getConfigProperty
          (PlainTextOutputTarget.CONFIGURATION_PREFIX + PlainTextOutputTarget.LINES_PER_INCH, "6"),
          getLinesPerInch()));
    }
    catch (IllegalArgumentException e)
    {
      // ignore
    }
    try
    {
      setCharsPerInch(StringUtil.parseInt(config.getConfigProperty
          (PlainTextOutputTarget.CONFIGURATION_PREFIX + PlainTextOutputTarget.CHARS_PER_INCH, "10"),
          getCharsPerInch()));
    }
    catch (IllegalArgumentException e)
    {
      // ignore
    }
  }

  /**
   * Stores the input from the dialog into the report configuration of the 
   * report.
   * 
   * @param config the report configuration that should receive the new
   * settings.
   */
  public void storeToConfiguration(final ReportConfiguration config)
  {
    config.setConfigProperty(PlainTextOutputTarget.TEXT_OUTPUT_ENCODING,
        getEncoding());
    config.setConfigProperty(PlainTextOutputTarget.CONFIGURATION_PREFIX +
        PlainTextOutputTarget.CHARS_PER_INCH, String.valueOf(getCharsPerInch()));
    config.setConfigProperty(PlainTextOutputTarget.CONFIGURATION_PREFIX +
        PlainTextOutputTarget.LINES_PER_INCH, String.valueOf(getLinesPerInch()));

  }

  /**
   * Opens the dialog to query all necessary input from the user.
   * This will not start the processing, as this is done elsewhere.
   * 
   * @param report the report that should be processed.
   * @return true, if the processing should continue, false otherwise.
   */
  public boolean performQueryForExport(final JFreeReport report)
  {
    initFromConfiguration(report.getReportConfiguration());
    setModal(true);
    setVisible(true);
    if (isConfirmed() == false)
    {
      return false;
    }
    storeToConfiguration(report.getReportConfiguration());
    return true;
  }

  /**
   * Retrieves the resources for this dialog. If the resources are not initialized,
   * they get loaded on the first call to this method.
   *
   * @return this frames ResourceBundle.
   */
  protected ResourceBundle getResources()
  {
    if (resources == null)
    {
      resources = ResourceBundle.getBundle(BASE_RESOURCE_CLASS);
    }
    return resources;
  }

  /**
   * Checks, whether the printer supports the given encoding and adds it if possible.
   *
   * @param cmd the printer command set that should used for printing.
   * @param model the encoding combobox model that should contain the encoding.
   * @param encoding the specified encoding.
   */
  private void ensureEncodingAvailable
      (final PrinterCommandSet cmd, final EncodingComboBoxModel model, final String encoding)
  {
    if (cmd.isEncodingSupported(encoding))
    {
      model.ensureEncodingAvailable(encoding);
    }
  }

  /**
   * Creates an encoding model.
   *
   * @param cmd  the printer command set.
   *
   * @return The encoding model.
   */
  private EncodingComboBoxModel createEncodingModel(final PrinterCommandSet cmd)
  {
    final EncodingComboBoxModel defaultEncodingModel = EncodingComboBoxModel.createDefaultModel();

    final EncodingComboBoxModel retval = new EncodingComboBoxModel();
    for (int i = 0; i < defaultEncodingModel.getSize(); i++)
    {
      final String encoding = defaultEncodingModel.getEncoding(i);
      if (cmd.isEncodingSupported(encoding))
      {
        final String description = defaultEncodingModel.getDescription(i);
        retval.addEncoding(encoding, description);
      }
    }
    retval.sort();
    return retval;
  }

  /**
   * Selects a file to use as target for the report processing.
   */
  protected void performSelectFile()
  {
    if (fileChooser == null)
    {
      fileChooser = new JFileChooser();
      fileChooser.addChoosableFileFilter(new ExtensionFileFilter("Plain text files", ".txt"));
      fileChooser.setMultiSelectionEnabled(false);
    }

    fileChooser.setSelectedFile(new File(getFilename()));
    final int option = fileChooser.showSaveDialog(this);
    if (option == JFileChooser.APPROVE_OPTION)
    {
      final File selFile = fileChooser.getSelectedFile();
      String selFileName = selFile.getAbsolutePath();

      // Test if ends on xls
      if (StringUtil.endsWithIgnoreCase(selFileName, ".txt") == false)
      {
        selFileName = selFileName + ".txt";
      }
      setFilename(selFileName);
    }
  }

  /**
   * Validates the contents of the dialog's input fields. If the selected file exists, it is also
   * checked for validity.
   *
   * @return true, if the input is valid, false otherwise
   */
  public boolean performValidate()
  {
    final String filename = getFilename();
    if (filename.trim().length() == 0)
    {
      JOptionPane.showMessageDialog(this,
          getResources().getString(
              "plain-text-exportdialog.targetIsEmpty"),
          getResources().getString("plain-text-exportdialog.errorTitle"),
          JOptionPane.ERROR_MESSAGE);
      return false;
    }
    final File f = new File(filename);
    if (f.exists())
    {
      if (f.isFile() == false)
      {
        JOptionPane.showMessageDialog(this,
            getResources().getString("plain-text-exportdialog.targetIsNoFile"),
            getResources().getString("plain-text-exportdialog.errorTitle"),
            JOptionPane.ERROR_MESSAGE);
        return false;
      }
      if (f.canWrite() == false)
      {
        JOptionPane.showMessageDialog(this,
            getResources().getString("plain-text-exportdialog.targetIsNotWritable"),
            getResources().getString("plain-text-exportdialog.errorTitle"),
            JOptionPane.ERROR_MESSAGE);
        return false;
      }
      final String key1 = "plain-text-exportdialog.targetOverwriteConfirmation";
      final String key2 = "plain-text-exportdialog.targetOverwriteTitle";
      if (JOptionPane.showConfirmDialog(this,
          MessageFormat.format(getResources().getString(key1),
              new Object[]{getFilename()}
          ),
          getResources().getString(key2),
          JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE)
          == JOptionPane.NO_OPTION)
      {
        return false;
      }
    }

    return true;
  }
}