Package com.cburch.logisim.proj

Source Code of com.cburch.logisim.proj.Projects$MyListener

/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */

package com.cburch.logisim.proj;

import java.awt.Dimension;
import java.awt.Point;
import java.awt.Window;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.WeakHashMap;

import com.cburch.logisim.file.Loader;
import com.cburch.logisim.gui.main.Frame;
import com.cburch.logisim.util.MacCompatibility;
import com.cburch.logisim.util.PropertyChangeWeakSupport;

public class Projects {
  public static final String projectListProperty = "projectList";
 
  private static final WeakHashMap<Window, Point> frameLocations
    = new WeakHashMap<Window, Point>();
 
  private static void projectRemoved(Project proj, Frame frame,
      MyListener listener) {
    frame.removeWindowListener(listener);
    openProjects.remove(proj);
    proj.getSimulator().shutDown();
    propertySupport.firePropertyChange(projectListProperty, null, null);
  }

  private static class MyListener extends WindowAdapter {
    @Override
    public void windowActivated(WindowEvent event) {
      mostRecentFrame = (Frame) event.getSource();
    }
   
    @Override
    public void windowClosing(WindowEvent event) {
      Frame frame = (Frame) event.getSource();
      if ((frame.getExtendedState() & Frame.ICONIFIED) == 0) {
        mostRecentFrame = frame;
        try {
          frameLocations.put(frame, frame.getLocationOnScreen());
        } catch (Throwable t) { }
      }
    }
   
    @Override
    public void windowClosed(WindowEvent event) {
      Frame frame = (Frame) event.getSource();
      Project proj = frame.getProject();
     
      if (frame == proj.getFrame()) {
        projectRemoved(proj, frame, this);
      }
      if (openProjects.isEmpty() && !MacCompatibility.isSwingUsingScreenMenuBar()) {
        ProjectActions.doQuit();
      }
    }
   
    @Override
    public void windowOpened(WindowEvent event) {
      Frame frame = (Frame) event.getSource();
      Project proj = frame.getProject();

      if (frame == proj.getFrame() && !openProjects.contains(proj)) {
        openProjects.add(proj);
        propertySupport.firePropertyChange(projectListProperty, null, null);
      }
    }
  }

  private static final MyListener myListener = new MyListener();
  private static final PropertyChangeWeakSupport propertySupport
    = new PropertyChangeWeakSupport(Projects.class);
  private static ArrayList<Project> openProjects = new ArrayList<Project>();
  private static Frame mostRecentFrame = null;

  private Projects() { }
 
  public static Frame getTopFrame() {
    Frame ret = mostRecentFrame;
    if (ret == null) {
      Frame backup = null;
      for (Project proj : openProjects) {
        Frame frame = proj.getFrame();
        if (ret == null) ret = frame;
        if (ret.isVisible() && (ret.getExtendedState() & Frame.ICONIFIED) != 0) {
          backup = ret;
        }
      }
      if (ret == null) ret = backup;
    }
    return ret;
  }
 
  static void windowCreated(Project proj, Frame oldFrame, Frame frame) {
    if (oldFrame != null) {
      projectRemoved(proj, oldFrame, myListener);
    }

    if (frame == null) return;
   
    // locate the window
    Point lowest = null;
    for (Project p : openProjects) {
      Frame f = p.getFrame();
      if (f == null) continue;
      Point loc = p.getFrame().getLocation();
      if (lowest == null || loc.y > lowest.y) lowest = loc;
    }
    if (lowest != null) {
      Dimension sz = frame.getToolkit().getScreenSize();
      int x = Math.min(lowest.x + 20, sz.width - 200);
      int y = Math.min(lowest.y + 20, sz.height - 200);
      if (x < 0) x = 0;
      if (y < 0) y = 0;
      frame.setLocation(x, y);
    }

    if (frame.isVisible() && !openProjects.contains(proj)) {
      openProjects.add(proj);
      propertySupport.firePropertyChange(projectListProperty, null, null);
    }
    frame.addWindowListener(myListener);
  }
 
  public static List<Project> getOpenProjects() {
    return Collections.unmodifiableList(openProjects);
  }
 
  public static boolean windowNamed(String name) {
    for (Project proj : openProjects) {
      if (proj.getLogisimFile().getName().equals(name)) return true;
    }
    return false;
  }
 
  public static Project findProjectFor(File query) {
    for (Project proj : openProjects) {
      Loader loader = proj.getLogisimFile().getLoader();
      if (loader == null) continue;
      File f = loader.getMainFile();
      if (query.equals(f)) return proj;
    }
    return null;
  }

  //
  // PropertyChangeSource methods
  //
  public static void addPropertyChangeListener(PropertyChangeListener listener) {
    propertySupport.addPropertyChangeListener(listener);
  }
  public static void addPropertyChangeListener(String propertyName, PropertyChangeListener listener) {
    propertySupport.addPropertyChangeListener(propertyName, listener);
  }
  public static void removePropertyChangeListener(PropertyChangeListener listener) {
    propertySupport.removePropertyChangeListener(listener);
  }
  public static void removePropertyChangeListener(String propertyName, PropertyChangeListener listener) {
    propertySupport.removePropertyChangeListener(propertyName, listener);
  }
 
  public static Point getLocation(Window win) {
    Point ret = frameLocations.get(win);
    return ret == null ? null : (Point) ret.clone();
  }
}
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