mergestep1.java

编辑视频文件

    }

    /**
     * Prompts the user to browse to a valid .eaf file.
     *
     * @return a String representation of a file
     */
    private String getOpenFileName() {
        String eafDir = (String) Preferences.get("LastUsedEAFDir", null);

        if (eafDir == null) {
            eafDir = System.getProperty("user.dir");
        }

        JFileChooser chooser = new JFileChooser();

        // the file chooser is not really part of the localisation
        chooser.setApproveButtonText("Select");
        chooser.setCurrentDirectory(new File(eafDir));
        chooser.setDialogTitle(ElanLocale.getString(
                "MergeTranscriptionDialog.SelectEAF"));

        File eafFile = null;
        FileFilter filter = ElanFileFilter.createFileFilter(ElanFileFilter.EAF_TYPE);
        chooser.setFileFilter(filter);

        if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
            File curDir = chooser.getCurrentDirectory();

            if (curDir != null) {
                Preferences.set("LastUsedEAFDir", curDir.getAbsolutePath(), null);
            }

            eafFile = chooser.getSelectedFile();

            if (eafFile != null) {
                String name = eafFile.getAbsolutePath();

                if (isExistingEAF(name)) {
                    return name;
                } else {
                    return null;
                }
            } else {
                return null;
            }
        } else {
            // dialog canceled
            return null;
        }
    }

    /**
     * Prompts the user to provide a filepath for a new .eaf file.
     *
     * @return a String representation of a file
     */
    private String getSaveFileName() {
        String eafDir = (String) Preferences.get("LastUsedEAFDir", null);

        if (eafDir == null) {
            eafDir = System.getProperty("user.dir");
        }

        JFileChooser chooser = new JFileChooser();

        // the file chooser is not really part of the localisation
        chooser.setApproveButtonText("Save");
        chooser.setCurrentDirectory(new File(eafDir));
        chooser.setDialogTitle(ElanLocale.getString(
                "MergeTranscriptionDialog.SelectEAF"));

        File eafFile = null;
        FileFilter filter = ElanFileFilter.createFileFilter(ElanFileFilter.EAF_TYPE);
        chooser.setFileFilter(filter);

        if (chooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
            File curDir = chooser.getCurrentDirectory();

            if (curDir != null) {
                Preferences.set("LastUsedEAFDir", curDir.getAbsolutePath(), null);
            }

            eafFile = chooser.getSelectedFile();

            if (eafFile != null) {
                String name = eafFile.getAbsolutePath();

                if (!validEAFName(name)) {
                    name += ("." + FileExtension.EAF_EXT[0]);
                }

                File f = new File(name);

                if (f.exists()) {
                    if (JOptionPane.showConfirmDialog(null,
                                (name + "\n" +
                                ElanLocale.getString(
                                    "MergeTranscriptionDialog.Warning.DestinationExists")),
                                ElanLocale.getString("Message.Warning"),
                                JOptionPane.YES_NO_OPTION) == JOptionPane.NO_OPTION) {
                        return null;
                    }

                    return name;
                }

                return name;
            } else {
                return null;
            }
        } else {
            // dialog canceled
            return null;
        }
    }

    /**
     * Checks if a filename points to an exisitng .eaf file.
     *
     * @param fileName a String representation of a file
     *
     * @return true if the file exists and is an .eaf, false otherwise
     */
    private boolean isExistingEAF(String fileName) {
        if (fileName == null) {
            return false;
        }

        File f = new File(fileName);

        if (!f.exists()) {
            return false;
        }

        return validEAFName(fileName);
    }

    /**
     * Checks the extension of the filename.
     *
     * @param name the filename
     *
     * @return true if it ends with .eaf (case insensitive)
     */
    private boolean validEAFName(String name) {
        if (name == null) {
            return false;
        }

        String lowerPathName = name.toLowerCase();

        String[] exts = FileExtension.EAF_EXT;
        boolean validExt = false;

        for (int i = 0; i < exts.length; i++) {
            if (lowerPathName.endsWith("." + exts[i])) {
                validExt = true;

                break;
            }
        }

        return validExt;
    }

    /**
     * If there are valid sources and a valid destination the next button can
     * be enabled, after storing the file paths to the properties map.
     */
    private void checkCondition() {
        if (src1Ready && src2Ready && destReady) {
            if (source1Field.getText().equals(source2Field.getText())) {
                JOptionPane.showMessageDialog(this,
                    ElanLocale.getString(
                        "MergeTranscriptionDialog.Warning.SameSources"),
                    ElanLocale.getString("Message.Warning"),
                    JOptionPane.WARNING_MESSAGE);
                multiPane.setButtonEnabled(MultiStepPane.NEXT_BUTTON, false);

                return;
            }

            if (source1Field.getText().equals(destField.getText()) ||
                    source2Field.getText().equals(destField.getText())) {
                JOptionPane.showMessageDialog(this,
                    ElanLocale.getString(
                        "MergeTranscriptionDialog.Warning.DestinationIsSource"),
                    ElanLocale.getString("Message.Warning"),
                    JOptionPane.WARNING_MESSAGE);
                multiPane.setButtonEnabled(MultiStepPane.NEXT_BUTTON, false);

                return;
            }

            multiPane.setButtonEnabled(MultiStepPane.NEXT_BUTTON, true);
        } else {
            multiPane.setButtonEnabled(MultiStepPane.NEXT_BUTTON, false);
        }
    }

    /**
     * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
     */
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == browseSource1) {
            String name = getOpenFileName();

            if (name != null) {
                source1Field.setText(name);
                src1Ready = true;
            } else {
                if (isExistingEAF(source1Field.getText())) {
                    src1Ready = true;
                } else {
                    src1Ready = false;
                }
            }
        } else if (e.getSource() == browseSource2) {
            String name = getOpenFileName();

            if (name != null) {
                source2Field.setText(name);
                src2Ready = true;
            } else {
                if (isExistingEAF(source2Field.getText())) {
                    src2Ready = true;
                } else {
                    src2Ready = false;
                }
            }
        } else {
            String name = getSaveFileName();

            if (name != null) {
                destField.setText(name);
                destReady = true;
            } else {
                if ((destField.getText() != null) &&
                        (destField.getText().length() > 4)) {
                    destReady = true;
                } else {
                    destReady = false;
                }
            }
        }

        checkCondition();
    }

    /**
     * @see java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)
     */
    public void itemStateChanged(ItemEvent e) {
        // only one possible source
        if (e.getStateChange() == ItemEvent.SELECTED) {
            browseSource1.setEnabled(false);
            source1Field.setText(curTranscription.getFullPath());
            src1Ready = true;
        } else {
            browseSource1.setEnabled(true);
            source1Field.setText("");
            src1Ready = false;
        }

        checkCondition();
    }
}