def OnInit(self):
javabridge.activate_awt()
return True
def fn_start(event):
javabridge.start_vm([])
javabridge.activate_awt()
start_button.Enable(False)
launch_button.Enable(True)
stop_button.Enable(True)
def main(args):
javabridge.activate_awt()
script = """
//--------------------------------------
//
// The anonymous callable runs on the thread
// that started Java - that's the rule with AWT.
//
// The callable returns a Java Map whose keys
// have the labels of objects like "qUp" for
// the upward queue. Python can then fetch
// whichever ones it wants and do Java stuff
// with them.
//
//--------------------------------------
new java.util.concurrent.Callable() {
call: function() {
importClass(javax.swing.SpringLayout);
importClass(javax.swing.JFrame);
importClass(javax.swing.JTextField);
importClass(javax.swing.JButton);
importClass(javax.swing.JScrollPane);
importClass(javax.swing.JTextArea);
importClass(java.util.Hashtable);
importClass(java.awt.event.ActionListener);
importClass(java.awt.event.WindowAdapter);
importClass(java.util.concurrent.SynchronousQueue);
d = new Hashtable();
frame = new JFrame("Callbacks in Java");
d.put("frame", frame);
contentPane = frame.getContentPane();
layout = new SpringLayout();
contentPane.setLayout(layout);
textField = new JTextField("'Hello, world.'", 60);
d.put("textField", textField);
contentPane.add(textField);
execButton = new JButton("Exec");
contentPane.add(execButton);
evalButton = new JButton("Eval");
contentPane.add(evalButton);
result = new JTextArea("None");
scrollPane = new JScrollPane(result)
contentPane.add(scrollPane);
d.put("result", result);
//-----------------------------------------------------
//
// The layout is:
//
// [ textField] [execButton] [evalButton]
// [ scrollPane ]
//
//-----------------------------------------------------
layout.putConstraint(SpringLayout.WEST, textField,
5, SpringLayout.WEST, contentPane);
layout.putConstraint(SpringLayout.NORTH, textField,
5, SpringLayout.NORTH, contentPane);
layout.putConstraint(SpringLayout.WEST, execButton,
5, SpringLayout.EAST, textField);
layout.putConstraint(SpringLayout.NORTH, execButton,
0, SpringLayout.NORTH, textField);
layout.putConstraint(SpringLayout.WEST, evalButton,
5, SpringLayout.EAST, execButton);
layout.putConstraint(SpringLayout.NORTH, evalButton,
0, SpringLayout.NORTH, textField);
layout.putConstraint(SpringLayout.NORTH, scrollPane,
5, SpringLayout.SOUTH, textField);
layout.putConstraint(SpringLayout.WEST, scrollPane,
0, SpringLayout.WEST, textField);
layout.putConstraint(SpringLayout.EAST, scrollPane,
0, SpringLayout.EAST, evalButton);
layout.putConstraint(SpringLayout.EAST, contentPane,
5, SpringLayout.EAST, evalButton);
layout.putConstraint(SpringLayout.SOUTH, contentPane,
20, SpringLayout.SOUTH, scrollPane);
//------------------------------------------------
//
// qUp sends messages from Java to Python
// qDown sends messages from Python to Java
//
// The communications protocol is that qUp sends
// a command. For Exec and Eval commands, qUp sends
// text and qDown must send a reply to continue.
// For the Exit command, qUp sends the command and
// Python must dispose of Java
//
//-------------------------------------------------
qUp = new SynchronousQueue();
qDown = new SynchronousQueue();
d.put("qUp", qUp);
d.put("qDown", qDown);
//-----------------------------------------------
//
// Create an action listener that binds the execButton
// action to a function that instructs Python to
// execute the contents of the text field.
//
//-----------------------------------------------
alExec = new ActionListener() {
actionPerformed: function(e) {
qUp.put("Exec");
qUp.put(textField.getText());
result.setText(qDown.take());
}
};
execButton.addActionListener(alExec);
//-----------------------------------------------
//
// Create an action listener that binds the evalButton
// action to a function that instructs Python to
// evaluate the contents of the text field.
//
//-----------------------------------------------
alEval = new ActionListener() {
actionPerformed: function(e) {
qUp.put("Eval");
qUp.put(textField.getText());
result.setText(qDown.take());
}
};
evalButton.addActionListener(alEval);
//-----------------------------------------------
//
// Create a window listener that binds the frame's
// windowClosing action to a function that instructs
// Python to exit.
//
//-----------------------------------------------
wl = new WindowAdapter() {
windowClosing: function(e) {
qUp.put("Exit");
}
};
frame.addWindowListener(wl);
frame.pack();
frame.setVisible(true);
return d;
}
};"""
c = javabridge.run_script(script)
f = javabridge.make_future_task(c)
d = javabridge.execute_future_in_main_thread(f)
d = javabridge.get_map_wrapper(d)
qUp = d["qUp"]
qDown = d["qDown"]
frame = d["frame"]
while True:
cmd = javabridge.run_script("qUp.take();", dict(qUp=qUp))
if cmd == "Exit":
break
text = javabridge.run_script("qUp.take();", dict(qUp=qUp))
if cmd == "Eval":
try:
result = eval(text, globals(), locals())
except Exception as e:
result = "%s\n%s" % (str(e), traceback.format_exc())
except:
result = "What happened?"
else:
try:
exec(text, globals(), locals())
result = "Operation succeeded"
except Exception as e:
result = "%s\n%s" % (str(e), traceback.format_exc())
except:
result = "What happened?"
javabridge.run_script("qDown.put(result);",
dict(qDown=qDown, result=str(result)))
javabridge.run_script("frame.dispose();", dict(frame=frame))
def main(args):
javabridge.activate_awt()
cpython = javabridge.make_instance("org/cellprofiler/javabridge/CPython",
"()V")
script = """
//--------------------------------------
//
// The anonymous callable runs on the thread
// that started Java - that's the rule with AWT.
//
// The callable returns a Java Map whose keys
// have the labels of objects like "qUp" for
// the upward queue. Python can then fetch
// whichever ones it wants and do Java stuff
// with them.
//
//--------------------------------------
new java.util.concurrent.Callable() {
call: function() {
importClass(javax.swing.SpringLayout);
importClass(javax.swing.JFrame);
importClass(javax.swing.JTextField);
importClass(javax.swing.JButton);
importClass(javax.swing.JScrollPane);
importClass(javax.swing.JTextArea);
importClass(java.util.Hashtable);
importClass(java.util.ArrayList);
importClass(java.util.concurrent.CountDownLatch);
importClass(java.awt.event.ActionListener);
importClass(java.awt.event.WindowAdapter);
d = new Hashtable();
signal = new CountDownLatch(1);
d.put("signal", signal);
frame = new JFrame("Callbacks in Java");
d.put("frame", frame);
contentPane = frame.getContentPane();
layout = new SpringLayout();
contentPane.setLayout(layout);
textField = new JTextField("'Hello, world.'", 60);
d.put("textField", textField);
contentPane.add(textField);
execButton = new JButton("Exec");
contentPane.add(execButton);
evalButton = new JButton("Eval");
contentPane.add(evalButton);
result = new JTextArea("None");
scrollPane = new JScrollPane(result)
contentPane.add(scrollPane);
d.put("result", result);
//-----------------------------------------------------
//
// The layout is:
//
// [ textField] [execButton] [evalButton]
// [ scrollPane ]
//
//-----------------------------------------------------
layout.putConstraint(SpringLayout.WEST, textField,
5, SpringLayout.WEST, contentPane);
layout.putConstraint(SpringLayout.NORTH, textField,
5, SpringLayout.NORTH, contentPane);
layout.putConstraint(SpringLayout.WEST, execButton,
5, SpringLayout.EAST, textField);
layout.putConstraint(SpringLayout.NORTH, execButton,
0, SpringLayout.NORTH, textField);
layout.putConstraint(SpringLayout.WEST, evalButton,
5, SpringLayout.EAST, execButton);
layout.putConstraint(SpringLayout.NORTH, evalButton,
0, SpringLayout.NORTH, textField);
layout.putConstraint(SpringLayout.NORTH, scrollPane,
5, SpringLayout.SOUTH, textField);
layout.putConstraint(SpringLayout.WEST, scrollPane,
0, SpringLayout.WEST, textField);
layout.putConstraint(SpringLayout.EAST, scrollPane,
0, SpringLayout.EAST, evalButton);
layout.putConstraint(SpringLayout.EAST, contentPane,
5, SpringLayout.EAST, evalButton);
layout.putConstraint(SpringLayout.SOUTH, contentPane,
20, SpringLayout.SOUTH, scrollPane);
//-----------------------------------------------
//
// Create an action listener that binds the execButton
// action to a function that instructs Python to
// execute the contents of the text field.
//
//-----------------------------------------------
alExec = new ActionListener() {
actionPerformed: function(e) {
try {
cpython.exec(textField.getText());
result.setText("OK");
} catch(err) {
result.setText(err.message);
}
}
};
execButton.addActionListener(alExec);
//-----------------------------------------------
//
// Create an action listener that binds the evalButton
// action to a function that instructs Python to
// evaluate the contents of the text field.
//
//-----------------------------------------------
alEval = new ActionListener() {
actionPerformed: function(e) {
try {
locals = new Hashtable();
jresult = new ArrayList();
locals.put("script", textField.getText());
locals.put("jresult", jresult);
script = "from jt import javabridge\\n" +
"result=eval(javabridge.to_string(script))\\n" +
"jwresult=javabridge.JWrapper(jresult)\\n" +
"jwresult.add(str(result))"
cpython.exec(script, locals, null);
result.setText(jresult.get(0));
} catch(err) {
result.setText(err.message);
}
}
};
evalButton.addActionListener(alEval);
//-----------------------------------------------
//
// Create a window listener that binds the frame's
// windowClosing action to a function that instructs
// Python to exit.
//
//-----------------------------------------------
wl = new WindowAdapter() {
windowClosing: function(e) {
signal.countDown();
}
};
frame.addWindowListener(wl);
frame.pack();
frame.setVisible(true);
return d;
}
};"""
c = javabridge.run_script(script, dict(cpython=cpython))
f = javabridge.make_future_task(c)
d = javabridge.execute_future_in_main_thread(f)
d = javabridge.get_map_wrapper(d)
frame = javabridge.JWrapper(d["frame"])
signal = javabridge.JWrapper(d["signal"])
signal. await ()
frame.dispose()