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Re: [ease-dev] Button Keylistener Python
Hi Raphael,

Thanks for reporting back what the change was that resolved your problem.

As for fields, when using CPython with EASE, the underlying Python <-> Java bridge is provided by Py4J. Please have a look at https://www.py4j.org/faq.html#how-to-access-a-field for accessing fields. 

Note: This documentation link mentions "auto_field" as an option. Unfortunately EASE doesn't let you change that. The parameter would need to be passed in when starting py4j here in the code. You could consider making a pull request, or just stick with the "get_field" way of accessing the fields.

HTH
Jonah

~~~
Jonah Graham (he/him)
Kichwa Coders
www.kichwacoders.com


On Fri, 10 Jan 2025 at 02:54, Raphael Geissler <raphael.geissler@xxxxxxxxx> wrote:
Hi Jonah,

thanks for the link.

class Java:
    implements = ['org.eclipse.swt.events.KeyListener']

does fix it.

I have one other question. How are public fields of a Java class
mapped to Python.
My Code looks now like this:
------------------------------------------------------------------------------------
# name : Keylistener Example

loadModule('/System/UI Builder')
loadModule('/System/UI')

class MyKeyListener():
    def keyPressed(self, e):
        print(f"Key pressed: {e.keyCode}")

    def keyReleased(self, e):
        print(f"Key released: {e}")

    class Java:
        implements = ['org.eclipse.swt.events.KeyListener']

createView('Example')
textBox = createText("")
executeUI(f'''
textBox.addKeyListener(MyKeyListener())
''')
------------------------------------------------------------------------------------
If I press the 'Carriage Return' key, I see this output:
------------------------------------------------------------------------------------
Key pressed: <py4j.java_gateway.JavaMember object at 0x0000013CBAFE6C80>
Key released: KeyEvent{Text {} time=169739578 data="" character='
'=0xd keyCode=0xd keyLocation=0x0 stateMask=0x0 doit=true}
------------------------------------------------------------------------------------

As you can, if I print the KeyEvent class, there is a member keyCode,
but if I print the keyCode, I get this strange output:
<py4j.java_gateway.JavaMember object at 0x0000013CBAFE6C80>

So, I don't know how I can access the keyCode value.

Does someone have an idea, how I can solve this?

BR,

Raphael

Am Do., 9. Jan. 2025 um 16:11 Uhr schrieb Jonah Graham <jonah@xxxxxxxxxxxxxxxx>:
>
> Hi Raphael,
>
> I haven't been actively using EASE for sometime, but this sample from the tutorial course I ran at EclipseCon demonstrates using SWT listeners so may be useful to you: https://github.com/jonahgraham/EASE-Python-Examples/blob/master/Solutions/Integrate%20Solutions/listviewer.py
>
> HTH
> Jonah
>
> ~~~
> Jonah Graham (he/him)
> Kichwa Coders
> www.kichwacoders.com
>
>
> On Thu, 9 Jan 2025 at 09:12, Raphael Geissler via ease-dev <ease-dev@xxxxxxxxxxx> wrote:
>>
>> Hi!
>>
>> Thanks for the hint. Unfortunately it doesn't work.
>>
>> BR
>>
>> Am Do., 9. Jan. 2025 um 13:52 Uhr schrieb Yvan LUSSAUD <yvan.lussaud@xxxxxxx>:
>> >
>> > I didn't test it, but there is a method getUiEvent() (found using the
>> > Modules Explorer view). You can call it in the callback. Maybe you can
>> > call it in your callback() method to distinguish between a click, key
>> > pressed etc...
>> >
>> > Yvan Lussaud.
>> >
>> > Le jeudi 09 janvier 2025 à 13:32 +0100, Raphael Geissler a écrit :
>> > > Hi Yvan,
>> > >
>> > > you're right. This was not correct, but it does not solve the error
>> > > with the MyKeyListener class.
>> > >
>> > > Do you have any idea how I have to implement this key listener class?
>> > >
>> > > BR,
>> > >
>> > > Raphael
>> > >
>> > > Am Do., 9. Jan. 2025 um 13:28 Uhr schrieb Yvan LUSSAUD
>> > > <yvan.lussaud@xxxxxxx>:
>> > > >
>> > > > Hi Raphael,
>> > > >
>> > > > You need to write the code of the call back as a String:
>> > > >
>> > > > button = createButton('DoIt', 'callback()')
>> > > >
>> > > > regards,
>> > > > Yvan Lussaud.
>> > > >
>> > > > Le jeudi 09 janvier 2025 à 13:03 +0100, Raphael Geissler via ease-
>> > > > dev a
>> > > > écrit :
>> > > > > Hi *,
>> > > > >
>> > > > > does anyone know, how I can add a key listener to a button within
>> > > > > a
>> > > > > Python EASE Script. I tried following, but I get following error.
>> > > > >
>> > > > > Code:
>> > > > > -----------------------------------------------------------------
>> > > > > ----
>> > > > > ------------------
>> > > > > # name : Keylistener Example
>> > > > > loadModule('/System/UI Builder')
>> > > > >
>> > > > > def callback():
>> > > > >     print('Button clicked')
>> > > > >
>> > > > > class MyKeyListener(org.eclipse.swt.events.KeyListener):
>> > > > >     def keyPressed(self, event):
>> > > > >         print("Key pressed:", event.character)
>> > > > >
>> > > > >     def keyReleased(self, event):
>> > > > >         print("Key released:", event.character)
>> > > > >
>> > > > > createView('Example')
>> > > > >
>> > > > > button = createButton('DoIt', callback)
>> > > > > button.addKeyListener(MyKeyListener())
>> > > > > -----------------------------------------------------------------
>> > > > > ----
>> > > > > ------------------
>> > > > >
>> > > > > Error:
>> > > > > -----------------------------------------------------------------
>> > > > > ----
>> > > > > ------------------
>> > > > > org.eclipse.ease.ScriptExecutionException: Traceback (most recent
>> > > > > call last):
>> > > > > File "workspace://ease/working/keylistener_example.py", line 9,
>> > > > > in
>> > > > > <module>
>> > > > > # Jonah Graham (Kichwa Coders) - initial API and implementation
>> > > > > TypeError: JavaClass.__init__() takes 3 positional arguments but
>> > > > > 4
>> > > > > were given
>> > > > > -----------------------------------------------------------------
>> > > > > ----
>> > > > > ------------------
>> > > > >
>> > > > > Maybe someone has an idea what I do wrong...
>> > > > >
>> > > > > BR,
>> > > > >
>> > > > > Raphael
>> > > > > _______________________________________________
>> > > > > ease-dev mailing list
>> > > > > ease-dev@xxxxxxxxxxx
>> > > > > To unsubscribe from this list, visit
>> > > > > https://www.eclipse.org/mailman/listinfo/ease-dev
>> > > >
>> >
>> _______________________________________________
>> ease-dev mailing list
>> ease-dev@xxxxxxxxxxx
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