Quelle GraphBrowserFrame.java Sprache: JAVA

/***************************************************************************
  Title:      graphbrowser/GraphBrowserFrame.java
  Author:     Stefan Berghofer, TU Muenchen
  Options:    :tabSize=2:

  This class is the frame for the stand-alone application. It contains
  methods for handling menubar events.
***************************************************************************/

package isabelle.graphbrowser;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import isabelle.awt.*;

public class GraphBrowserFrame extends Frame implements ActionListener {
GraphBrowser gb;
MenuItem i1, i2;
String graphDir, psDir;

public void checkMenuItems() {
  if (gb.isEmpty()) {
   i1.setEnabled(false);
   i2.setEnabled(false);
  } else {
   i1.setEnabled(true);
   i2.setEnabled(true);
  }
}

public void actionPerformed(ActionEvent evt) {
  String label = evt.getActionCommand();
  if (label.equals("Quit"))
   System.exit(0);
  else if (label.equals("Export to PostScript")) {
   PS(true, label);
   return;
  } else if (label.equals("Export to EPS")) {
   PS(false, label);
   return;
  } else if (label.equals("Open ...")) {
   FileDialog fd = new FileDialog(this, "Open graph file", FileDialog.LOAD);
   if (graphDir != null)
    fd.setDirectory(graphDir);
   fd.setVisible(true);
   if (fd.getFile() == null) return;
   graphDir = fd.getDirectory();
   String fname = graphDir + fd.getFile();
   GraphBrowser gb2 = new GraphBrowser(fname);
   try {
    InputStream is = new FileInputStream(fname);
    gb2.initBrowser(is, false);
    is.close();
   } catch (IOException exn) {
    String button[] = {"OK"};
    MessageDialog md = new MessageDialog(this, "Error",
     "Can't open file " + fname + ".", button);
    md.setSize(350, 200);
    md.setVisible(true);
    return;
   }
   remove(gb);
   add("Center", gb2);
   gb = gb2;
   checkMenuItems();
   validate();
  }
}

public void PS(boolean printable,String label) {
  FileDialog fd=new FileDialog(this,label,FileDialog.SAVE);
  if (psDir!=null)
   fd.setDirectory(psDir);
  fd.setVisible(true);
  if (fd.getFile()==null) return;
  psDir=fd.getDirectory();
  String fname=psDir+fd.getFile();

  if ((new File(fname)).exists()) {
   String buttons[]={"Overwrite","Cancel"};
   MessageDialog md=new MessageDialog(this,"Warning",
         "Warning: File "+fname+" already exists. Overwrite?",
         buttons);
   md.setSize(350,200);
   md.setVisible(true);
   if (md.getText().equals("Cancel")) return;
  }

  try {
   gb.PS(fname,printable);
  } catch (IOException exn) {
   String button[]={"OK"};
   MessageDialog md=new MessageDialog(this,"Error",
         "Unable to write file "+fname+".",button);
   md.setSize(350,200);
   md.setVisible(true);
  }
}

public GraphBrowserFrame(GraphBrowser br) {
  super("GraphBrowser");
  MenuItem i3, i4;
  gb = br;
  MenuBar mb = new MenuBar();
  Menu m1 = new Menu("File");
  m1.add(i3 = new MenuItem("Open ..."));
  m1.add(i1 = new MenuItem("Export to PostScript"));
  m1.add(i2 = new MenuItem("Export to EPS"));
  m1.add(i4 = new MenuItem("Quit"));
  i1.addActionListener(this);
  i2.addActionListener(this);
  i3.addActionListener(this);
  i4.addActionListener(this);
  checkMenuItems();
  mb.add(m1);
  setMenuBar(mb);
  add("Center", br);
    addWindowListener( new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
}
}

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Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

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