[8.5.1, Windows] Unclear processing of events...

Please, help me to understand the following problem.

Is it an error of system or it is my mistake? Sorry for awful English.

I will describe a problem on an example of very simple application.

To create an application it is necessary to execute the following steps.

1. Create the new application, let it will be “SSSEventDoesntWork”.
2. Make a new part of application – “SSSEventDoesntWorkModel” (part type is Smalltalk class).
3. By means of Public Interface Editor opened on the “SSSEventDoesntWorkModel” let's define a new event named “myEvent” by pressing the “Add” button.
4. Further let's define a new action “myAction” by pressing the “Add with defaults” button.
5. Click on the “File->save part” menu of Public Interface Editor.
6. By “Generate Defaults Script” we make a prototype of “myAction” method.
7. By Script Editor add the following expression to the “myAction”:

      self signalEvent: #myEvent.

8. Make a new part of this application named “SSSEventDoesntWorkWin” (part type is Visual part) and open the Composition Editor on it.
9. Place push button on the window.
10. By pressing “ctrl+p” we add an “SSSEventDoesntWorkModel” as the part on the working space near the window
11. Then place the Message prompter on the working space near the window.
12. Then connect #clicked of 'Push Button1' to #myAction of an SSSEventDoesntWorkModel.
13. Then connect #myEvent of a SSSEventDoesntWorkModel to #prompt of a Message prompter.

Now execute the application, press the button - Message prompter doesn’t appears.

WHY??? 

Now we will make the following changes.

1. By means of Public Interface Editor opened on the “SSSEventDoesntWorkModel” we delete event named “myEvent” and we will add it again, but already by means of a “Add with defaults” button.
2. Delete the “self signalEvent: #myEvent” in the “myAction” method.

Now execute the application, press the button - Message prompter will appears.

WHY??? 

I don’t understand this logic. Please help me.

Now execute the application, press the button - Message prompter doesn’t appears.

WHY??? 

 

Now we will make the following changes.

1. By means of Public Interface Editor opened on the “SSSEventDoesntWorkModel” we delete event named “myEvent” and we will add it again, but already by means of a “Add with defaults” button.
2. Delete the “self signalEvent: #myEvent” in the “myAction” method.

 

Now execute the application, press the button - Message prompter will appears.

WHY??? 

 

I don’t understand this logic. Please help me.

 

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Thanks for a fast response.

Yes, in the first case you are right, however it doesn't solve a problem since there is the second case.

Why works "myEvent" event if the "myMethod" method doesn't contain any code?

I calls a "myMethod", but it leads to Message prompter appears.

I programmed manually nothing, and no other connections in the Composition editor are present.

Thanks for a fast response.

Yes, in the first case you are right, however it doesn't solve a problem since there is the second case.

Why works "myEvent" event if the "myMethod" method doesn't contain any code?

I calls a "myMethod", but it leads to Message prompter appears.

I programmed manually nothing, and no other connections in the Composition editor are present.

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Yes.

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No I get it, too,...

Well this is really strange.

So the Problem is that:
You have a Button in the GUI which schall trigger the action "MyAction" in your button.
This "MyAction" is not related to your "MyEvent/MyMethod" event. But the Prompter which shall listen to "MyEvent/MyMethod" still comes up eventhough my Action doesn*t signal the "MyEvent/MyMethod" event....

The reason is here: set a breakpoint in "abtSignalActionEvents: actionName" (but better ovverid it in your ButtonClass!!!)

Then debuug into:

featuresAffectedByAction: actionName
    "For objects that do not signal their own change events. Defines the
    features affected by an action. The default is #(self) implying that the
    entire object (and so all of its attributes) have changed"

    ^#(self)

If your ButtonClass get a signal it distributes all of his ,... I'm not too sureif this is right, or intended,... I could image that something is broken...

Have a look here:
features

    ^self privInstanceFeatures,
        self privInterfaceSpecFeatures

This method is from 2009,.... I would ask the VAST-Support for an analysis.

Sebastian



Am 23.11.2012 11:21, schrieb SSS:

Yes.

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