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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Is there any way to declare .NET events in
IronPython?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Here is a simple example in C# that
“abstracts” a button pressed event into a “hello”
event:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
public delegate void HelloInvoked();<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
public class HelloControl : Panel<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
{<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
public event HelloInvoked Hello;<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
public HelloControl()<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
{<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
Button b = new Button();<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
b.Text = "Hello";<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
b.Click += new EventHandler(b_Click);<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
b.Dock = DockStyle.Fill;<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
this.Controls.Add(b);<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
}<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
void b_Click(object sender, EventArgs e)<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
{<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
if (Hello != null) Hello();<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
}<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I can do something equivalent with Python
functions:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>class
HelloControl(Panel):<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
Hello = []<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
def __init__(self):<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
b = Button(Text="Hello",Dock=DockStyle.Fill)<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
b.Click += self.on_Click<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
self.Controls.Add(b)<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
def on_Click(self,sender,e):<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>
for h in self.Hello: h()<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>def
Foo(): print "hello"<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color="#3366ff"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#3366FF'>hc.Hello
+= [Foo]<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>But for consistency with my other C# code
I’d like to use events if possible. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Any thoughts?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Many thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Michael<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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