/* AlgAnimFrame.java */import java.awt.*;import java.applet.*;import java.io.*;import java.net.*;public class AlgAnimFrame extends Frame {    AlgAnimApp parentApp;    URL sourceURL;    String algname;	 String algfile; //merv	 String filename; //merv    AlgThread alg = null;    Panel drawingPanel;    TextFrame tf;    ComPanel cpanel;    ControlPanel control_panel;	 ExtraFrame extraframe;    boolean step = false, stepWait = false;    int delay = 600;	     public AlgAnimFrame(AlgAnimApp parentApp, URL sourceURL) {        this.parentApp = parentApp;        this.sourceURL = sourceURL;        this.algname = parentApp.getParameter("algname");		  this.algfile = parentApp.getParameter("algfile");//merv	        this.filename = parentApp.getParameter("filename");//merv		  setTitle(algname);        alg = new AlgThread(this);		  // Arrange panels within frame        GridBagLayout gb = new GridBagLayout();        GridBagConstraints gc = new GridBagConstraints();        setLayout( gb );        gc.fill = GridBagConstraints.BOTH;        gc.gridwidth = GridBagConstraints.RELATIVE;        /* Give any extra space to the animation panel */        gc.weighty = 1.0;        gc.weightx = 0.0;        gc.gridx = 0; gc.gridy = 0;        gb.setConstraints( drawingPanel, gc );        add(drawingPanel);        /* Source panel */        tf = new TextFrame( sourceURL, sourceURL.getFile() );        gc.gridx = GridBagConstraints.RELATIVE; gc.gridy = 0;        /* The text panel's requirements are known and fixed */        gc.weightx = 1.0;        gc.gridwidth = GridBagConstraints.REMAINDER;        gb.setConstraints( tf, gc );        add( tf );         /* Commentary panel */        gc.gridwidth = GridBagConstraints.RELATIVE;        gc.gridx = 0; gc.gridy = GridBagConstraints.RELATIVE;        gc.weighty = 0.0;        gc.gridheight = GridBagConstraints.REMAINDER;        cpanel = new ComPanel( algname, 3 );        gb.setConstraints( cpanel, gc );        add( cpanel );         /* Control panel */        control_panel = new ControlPanel(this, algname);        gc.gridx = gc.gridy = GridBagConstraints.RELATIVE;        gc.gridwidth = GridBagConstraints.REMAINDER;        gb.setConstraints( control_panel, gc );        add( control_panel );        // generate initial data set        alg.generateData();		  pack();        validate();        show();		  extraframe = new ExtraFrame(this);			      } // init()    public Dimension preferredSize() {        return new Dimension(800,480);    }    public boolean handleEvent(Event event) {        if (event.id == Event.WINDOW_DESTROY) {            if (alg != null) {              alg.drawingPanel = null;              if (alg.isAlive())                alg.stop();            }				extraframe.Remove_Window( );            dispose();            parentApp.start_button.enable();        }        return super.handleEvent(event);    }    public void setText( int n, String s ) {        cpanel.setText( n, s );    }     public void Highlight( int n ) {        tf.Highlight(n);	try {	    Thread.sleep(delay);	} catch (InterruptedException e) {}    }    public void restoreDrawingPanelColor() {        alg.restoreDrawingPanelColor();    }    public void startAlg() {        if (alg.isAlive() && !stepWait) {            alg.stop();            alg = new AlgThread(this);            alg.start();        } else if (alg.isAlive() && stepWait) {            //alg.resume();            //System.out.println("alive");            step = true;            stepWait = false;        } else { // alg.isAlive() == false            alg = new AlgThread(this);            alg.start();        }        if (!stepWait) {            control_panel.run_button.disable();            control_panel.data_choice.disable();            control_panel.stop_button.enable();            control_panel.step_button.enable();        }    }     public void finishAlg() {        control_panel.stop_button.disable();        control_panel.run_button.enable();        control_panel.data_choice.enable();        alg.restoreDrawingPanelColor();    }     public void waitStep() {        if (step) {            control_panel.setText("Click NEXT STEP...");            control_panel.step_button.enable();            control_panel.repaint();            step = false; stepWait = true;            while (!step) {                try {                    Thread.sleep(100);                } catch (InterruptedException e) {}            }            if (!stepWait)                step = false;        }    }     public void setStep(boolean step) {        //setText(2, "Stepping through the next line(s)...");        this.step = step;        control_panel.stop_button.disable();        control_panel.run_button.enable();        control_panel.data_choice.enable();        if (step) {            control_panel.step_button.disable();            stepWait = true;        } else            stepWait = false;    }} // class AlgAnimApp