Shows how to build a basic SWT windows from Modelio

modelio SWT GUI

#
# This code show how to translates SWI Widgets snippets into a simple
# script that can be run directly in the Script window of Modelio.
# The code has been translated from java to jython and the first
# lines have been accomodated to fit within Modelio (indeed the
# eclipse part of modelio).
#
# This example take a particular exemple "Paint a cirle in a canvas".
# You should read th
# http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet245.java
# but the technique can be used for all the SWT widgets from 
# https://www.eclipse.org/swt/widgets/
# Just look in the corresponding snippet section and translate the code.

# (A) first import all necessary elements EXPLICITLY by name
#     Note that "*" cannot be used in jython because of class loading
from org.eclipse.swt.widgets import Display, Shell
from org.eclipse.swt.events  import PaintListener
from org.eclipse.swt import SWT

# (B) put the code at top level for instance
# B.1 here we get 
display = Display.getDefault().getActiveShell()
shell = Shell(display)
class SimplePaintListener(PaintListener):
  def paintControl(self, event) :
     rect = shell.getClientArea()
     event.gc.drawOval(0,0, rect.width-1, rect.height - 1)
shell.addPaintListener(SimplePaintListener())
shell.open()


# --------- the code below is the original code from the SWT widget catalog
# -- a few annotations have been added to explained has been done during the python translation
#
# import org.eclipse.swt.graphics.*;             <- from package import name1, name2, 
# import org.eclipse.swt.widgets.*;
# import org.eclipse.swt.events.*;

# public class Snippet245 {                      <- removed, code at top level

# public static void main(String [] args) {      <- removed, code at top level
#	final Display display = new Display();       <- changed to get exisiting display
# 	final Shell shell = new Shell(display);      <- add some parameters to close window, etc.
# 	shell.addPaintListener(new PaintListener() { <- first create the jython class, then register
#		@Override
#		public void paintControl(PaintEvent event) { <- same    
#			Rectangle rect = shell.getClientArea();
#			event.gc.drawOval(0, 0, rect.width - 1, rect.height - 1);
#		}
#	});
#	Rectangle clientArea = shell.getClientArea();
#	shell.setBounds(clientArea.x + 10, clientArea.y + 10, 200, 200);
#	shell.open ();
#	while (!shell.isDisposed()) {                       <- this loop must be removed in the context of modelio
#		if (!display.readAndDispatch()) display.sleep();
#	}
#	display.dispose();                                   <-  must be removed in the context of modelio
# }
#}