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package myDocumentFiles;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.fileEditor.FileDocumentManager;
import com.intellij.openapi.ui.DialogWrapper;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.vfs.LocalFileSystem;
import com.intellij.openapi.vfs.VirtualFile;
import javax.swing.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
/**
* Created by IntelliJ IDEA.
* User: Alexey.Chursin
* Date: Aug 30, 2010
* Time: 1:42:38 PM
*/
public class MyVisualPanel extends DialogWrapper {
private JTabbedPane viewFileTab;
private JTextField fileName;
private JButton buttonBrowse;
private JTextField directoryName;
private JFileChooser fileChooser = new JFileChooser("");
private VirtualFile selectedVFile;
private Document docFile;
// Set maximum allowed number of lines in a text file to edit.
private final int maxNumberofLines = 250;
private JPanel myVisualUI;
private JEditorPane myFileEditor;
private JPanel viewFilePanel;
private String initialFileContent = null;
private boolean nFocus;
public MyVisualPanel(boolean canBeParent) {
super(canBeParent);
init();
// The Browse button listener.
buttonBrowse.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (OpenFile()) {
if (docFile.getLineCount() > maxNumberofLines) {
Messages.showMessageDialog("File too long! Maximum allowed number of lines: " +
String.valueOf(maxNumberofLines) + ".\n"+
"To change this setting, modify the MyVisualPanel.maxNumberofLines field.", "Error", Messages.getErrorIcon());
return;
}
// Read the text file content.
initialFileContent = docFile.getText();
// Enable the View File tab
viewFileTab.setEnabled(true);
// Fill the "File name" and "Directory" text fields.
fileName.setText(selectedVFile.getName());
directoryName.setText(selectedVFile.getParent().getUrl());
myFileEditor.setText(initialFileContent);
}
}
});
// The file editor focus listener.
myFileEditor.addFocusListener(new FocusAdapter() {
public void focusGained(FocusEvent e) {
if (!docFile.isWritable() && nFocus) {
nFocus = false;
Messages.showMessageDialog("This file is read-only. You cannot save your changes.", "Warning",
Messages.getWarningIcon());
return;
} else return;
}
});
}
// Display the Open dialog and open the selected file.
public boolean OpenFile() {
FileNameExtensionFilter filter = new FileNameExtensionFilter("Text files", "txt");
fileChooser.setFileFilter(filter);
//... Open a file dialog.
int retval = fileChooser.showOpenDialog(null);
if (retval == JFileChooser.APPROVE_OPTION) {
// Get virtual file
selectedVFile = LocalFileSystem.getInstance().findFileByIoFile(fileChooser.getSelectedFile());
// Get document file
docFile = FileDocumentManager.getInstance().getDocument(selectedVFile);
nFocus = true;
return true;
}
viewFilePanel.setEnabled(false);
return false;
}
public JComponent createCenterPanel() {
return (JComponent) myVisualUI;
}
// The OK button handler.
protected void doOKAction() {
if (initialFileContent == null) {
this.close(0);
return;
}
if (!initialFileContent.equals(myFileEditor.getText())) {
if (Messages.showYesNoDialog("The file " + selectedVFile.getName() +
" has been changed. Are you sure you want to overwrite it?", "File Changed", Messages.getQuestionIcon()) == 0) {
if (docFile.isWritable()) {
docFile.setText(myFileEditor.getText());
} else {
Messages.showMessageDialog("This file is read-only! You cannot save your changes.", "Error", Messages.getErrorIcon());
return;
}
} else return;
}
this.close(0);
this.dispose();
}
}
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