how do I add an eventhandler to a control dynamically?

General
1

Hello,

I have created a containercontrol with one label, one text field and one button.
Then I added an array of this container controls to my window.
With a push button I’m creating a new instance of the container control and add it to the array.
In a method I’m rearranging the control and renaming it.

So far it’s working fine. I can now add these controls dynamically to my tabpanel.

Now I want to be able to delete some of the controls after I created it.
The button inside of the container control triggers a self.close.

Unfortunately I cannot trigger any methods outside of the container control because the method doesn’t exist when the control is created.
Now I want to trigger the event handler onClose when the container control is closed.

Here again it is not possible to refer to an outside method in the event handler.
So I have to add the event handler at the time of creation.

I just need to know how this may work.

Does anybody know how?

2

AddHandler.

ContainerInstance = New Container
AddHandler ContainerInstance.onClose, AddressOf someMethod

The first parameter to the method must be defined AS Container.

3

@Tim Hare
Thank you… I will look into that.

Can I use parameters with the method?

Something like:
AddHandler Waypoint.onClose, AddressOf Recalculate(Waypoint,Waypoints,“Waypoint”,135,4)

4

You set the call parameters in the method.

5

I know that I set the parameters in the method.
The question is if it’s possible to use a method which needs more than just the object type as parameter.
I’m gonna try some versions (with parameter, with only one parameter, no parameter).

6

Yes. The parameters of the method must match the parameters of the event definition with the addition of the object itself.

If the event definition was:

Foo(a as integer, b as Boolean)

The method is

Bar(obj as yourClass, a as integer, b as Boolean)

And you’d add it as

AddHandler myInst.Foo, addressOf Bar

NOTE: Don’t forget to call RemoveHandler when you’re done so your objects will properly get destroyed when they are removed from the array.

7

Hello Greg,

thanks a lot it’s working, now.

Now I have to add the RemoveHandler to my method because I hadn’t this in mind.