mainmenu.java

这是一个从音频信号里提取特征参量的程序

		digraph.paramFile = loadChooser.getSelectedFile();
		
		// read the parameters to file
		//
		digraph.read();
	    } 

	} else if(source.equals(saveStr)) {

	    // write the parameters to file
	    //
	    if (digraph.paramFile != null) {
		digraph.write();
	    }
	    else {

		// initialize the file chooser object
		//
		String cwd = System.getProperty("user.dir");

		JFileChooser saveChooser = new JFileChooser(cwd);
		
		// set the font and button text for the save chooser
		//
		saveChooser.setFont(newFont);
		String saveApprove = new String("Save");
		saveChooser.setApproveButtonText(saveApprove);
		
		// display the file chooser object
		//
		int returnVal = saveChooser.showOpenDialog(digraph);
		
		// check to see if a file was selected by the user
		//
		if (returnVal == JFileChooser.APPROVE_OPTION) {
		    
		    // retrieve the selected file
		    //
		    digraph.paramFile = saveChooser.getSelectedFile();
		    
		    // write the parameters to file
		    //
		    digraph.write();
		}
	    }

	} else if(source.equals(saveAsStr)) {
	    
	    JFileChooser saveChooser = null;
	    
	    // initialize the file chooser object
	    //
	    if(digraph.paramFile != null) {
		saveChooser = new JFileChooser(digraph.paramFile);
	    }
	    else {
		String cwd = System.getProperty("user.dir");
		saveChooser = new JFileChooser(cwd);
	    }    
	    
	    // set the font and button text for the save chooser
	    //
	    saveChooser.setFont(newFont);
	    String saveApprove = new String("Save");
	    saveChooser.setApproveButtonText(saveApprove);
	    
	    // display the file chooser object
	    //
	    int returnVal = saveChooser.showOpenDialog(digraph);
	    
	    // check to see if a file was selected by the user
	    //
	    if (returnVal == JFileChooser.APPROVE_OPTION) {
		
		// retrieve the selected file
		//
		digraph.paramFile = saveChooser.getSelectedFile();
		
		// write the parameters to file
		//
		digraph.write();
	    } 

	} else if(source.equals(in_Config_Str)) {

	    // create and display the configuration panel
	    //
	    ConfigBoxIn systemInConfig = new ConfigBoxIn(digraph, digraph.data, digraph.inVertex, digraph.workArea, 0);
	    systemInConfig.pack();
	    systemInConfig.setVisible(true);
	} else if(source.equals(clearStr)) {

	    // reset the param file name
	    //
	    digraph.paramFile = null;

	    // clear out all existing memory
	    //
	    digraph.clearAllMemory();

	    // refresh the work area
	    //
	    digraph.workArea.repaint();

	} else if(source.equals(quitStr)) {

	    // exit without saving if nothing has changed
	    //
	    if (!digraph.saveWork) {
		System.exit(0);
	    }

	    // popup a dialogue that prompts the user to save his/her changes
	    //
	    JFrame frame = new JFrame("Warning");
	    int ans = JOptionPane.showConfirmDialog(frame, "Would you like to save your current changes?", "Warning", JOptionPane.YES_NO_CANCEL_OPTION);

	    // get the users choice
	    //
	    if (ans == JOptionPane.YES_OPTION) {

		// initialize the file chooser object
		//
		JFileChooser saveChooser = new JFileChooser();
		
		// set the font and button text for the save chooser
		//
		saveChooser.setFont(newFont);
		String saveApprove = new String("Save");
		saveChooser.setApproveButtonText(saveApprove);
		
		// display the file chooser object
		//
		int returnVal = saveChooser.showOpenDialog(digraph);
		
		// check to see if a file was selected by the user
		//
		if (returnVal == JFileChooser.APPROVE_OPTION) {
		    
		    // retrieve the selected file
		    //
		    digraph.paramFile = saveChooser.getSelectedFile();
		    
		    // write the parameters to file
		    //
		    digraph.write();
		}

		// close the application
		//
		System.exit(0);
	    }
	    
	    else if (ans == JOptionPane.NO_OPTION) {

		// close the application
		//
		System.exit(0);
	    }
	    
	    else {
		return;
	    }

	} else if (source.equals(updateStr)) {

	    // check to see if a vertex with this label exists
	    //
	    if (digraph.coeffLabels.contains(nameField.getText())) {

		// display a warning message indicating that you cannot have
		// two vertices with the same name
		//
		JFrame frame = new JFrame("Warning");
		JOptionPane.showMessageDialog(frame, "A node with the label " 
					      + nameField.getText() + 
					      " already exists");
		return;
	    }

	    // remove the old label from the vector
	    //
	    digraph.coeffLabels.remove(digraph.currVertexFocus.getText());
	    digraph.coeffLabels.addElement(nameField.getText());

	    // update the vertex text with what the user entered
	    //
	    digraph.currVertexFocus.setText(nameField.getText());

	    // remove the frame from the screen
	    //
	    config.setVisible(false);

	} else if (source.equals(cancelStr)) {

	    // remove the frame from the screen
	    //
	    config.setVisible(false);

	} else if(source.equals(overviewStr)) {

	    // create a dismiss button for the text area
	    //
	    JButton dismiss = new JButton(dismissStr);
	    dismiss.setActionCommand(dismissStr);
	    dismiss.addActionListener(this);

	    // read the help file contents and append them to the text area
	    //
	    try { 

		// clear the text area
		//
		textArea.setText("");

		// create a file object for I/O
		//
		File helpFile = new File(OVERVIEW_FILE);

		// create a file reader object
		//
		FileReader fileReader = new  FileReader(helpFile);

		// initialize the buffer to read the contents of the help file
		//
		BufferedReader buff = new BufferedReader(fileReader); 

		// read each line fo the file
		//
		String document;
		while((document = buff.readLine()) != null) { 

		    // add the help message line to the text area
		    //
		    textArea.append(document+newline);
		}
	    } 
	    catch(IOException ioe) { }

	    // add the components to the frame
	    //
	    helpFrame.getContentPane().add(scrollPane, BorderLayout.CENTER);
	    helpFrame.getContentPane().add(dismiss, BorderLayout.SOUTH);

            // display the text area and dismiss button
            //
            helpFrame.pack();
            helpFrame.setVisible(true);

	} else if(source.equals(tutorialStr)) {

	    // create a dismiss button for the text area
	    //
	    JButton dismiss = new JButton(dismissStr);
	    dismiss.setActionCommand(dismissStr);
	    dismiss.addActionListener(this);

	    // read the help file contents and append them to the text area
	    //
	    try { 

		// clear the text area
		//
		textArea.setText("");

		// create a file object for I/O
		//
		File helpFile = new File(TUTORIAL_FILE);

		// create a file reader object
		//
		FileReader fileReader = new  FileReader(helpFile);

		// initialize the buffer to read the contents of the help file
		//
		BufferedReader buff = new BufferedReader(fileReader); 

		// read each line fo the file
		//
		String document;
		while((document = buff.readLine()) != null) { 

		    // add the help message line to the text area
		    //
		    textArea.append(document+newline);
		}
	    } 
	    catch(IOException ioe) { }

	    // add the components to the frame
	    //
	    helpFrame.getContentPane().add(scrollPane, BorderLayout.CENTER);
	    helpFrame.getContentPane().add(dismiss, BorderLayout.SOUTH);

            // display the text area and dismiss button
            //
            helpFrame.pack();
            helpFrame.setVisible(true);

	} else if(source.equals(dismissStr)) {

	    // remove the frame form the screen
	    //
	    helpFrame.setVisible(false);

	} else if(source.equals(delBlkStr)) {

	    digraph.enableCompDeletion = true;

	    /*

	    // remove all children and parent edges
	    //
	    if (digraph.currVertexFocus != null) {
		if (digraph.currVertexFocus.getClass().getName().equals("Vertex")) {
		    digraph.removeVertex(digraph.currVertexFocus);
		}
	    }
	    */

	} else if(source.equals(cutStr)) {
	    digraph.cut();
	} else if(source.equals(copyStr)) {
	    digraph.copy();
	} else if(source.equals(pasteStr)) {
	    digraph.paste();
	} else if(source.equals(contStr)) {
	    if (digraph.vertices.size() > 0) {
		digraph.createIOData(CONTAINER, NONE);
	    }
	} else if(source.equals(insArcStr)) {
	    digraph.enableArcInsertion = true;
	} else if(source.equals(delArcStr)) {
	    digraph.enableArcDeletion = true;
	} else if(source.equals(tutorialStr)) {
	    // not yet implemented
	} else {
	    digraph.createAlgorithm(e.getActionCommand());
	}
    }

    // method: constrain
    //
    // argument: 
    //     Container container: (input) container to place the component
    //     Component component: (input) the component to be constrained
    //     int grid_x: (input) horizontal position of component
    //     int grid_y: (input) vertical position of component
    //     int grid_width: (input) number of horizontal grid spots to take
    //     int grid_height: (input) number of vertical grid spots to take
    //     int fill: (input) directions to fill when component space is resized
    //     int anchor: (input) anchor position when component space is resized
    //     double weight_x: (input)relative amount of horizontal space 
    //                      component should take when its space is resized
    //     double weight_y: (input) relative amount of vertical space component
    //                      should take when its space is resized
    //     int top: (input) amount of inset space on top
    //     int left: (input) amount of inset space on left
    //     int bottom: (input) amount of inset space on bottom
    //     int right: (input) amount of inset space on right
    // 
    // returns: boolean flag indicating status
    //
    // this method creates the constraints of a component in a container
    // and then adds the component to the container.  it is based on 
    // code from "Java in a Nutshell" by David Flanagan. published by
    // O'Reilly and Associates incorporated.
    //
    public boolean constrain(Container container, Component component, 
			     int grid_x, int grid_y, int grid_width, 
			     int grid_height, int fill, int anchor, 
			     double weight_x, double weight_y, int top,
			     int left, int bottom, int right) {
	
	// set the constraints based on the input variables
	//
	GridBagConstraints c = new GridBagConstraints();
	c.gridx = grid_x;
	c.gridy = grid_y;
	c.gridwidth = grid_width;
	c.gridheight = grid_height;
	c.fill = fill;
	c.anchor = anchor;
	c.weightx = weight_x;
	c.weighty = weight_y;
	
	// if any of the buffer insets are greater than zero, create a new
	// Insets object
	//
	if (top + bottom + left + right > 0)
	    c.insets = new Insets(top, left, bottom, right);
	
	// set the constraints of the component
	//
	((GridBagLayout) container.getLayout()).setConstraints(component, c);
	
	// add the component to the container
	//
	container.add(component);
	
	// exit gracefully
	//
	return true;
    }
}

//
// end of file