can a defined event (evSon) of a son webContainer (wcSon) dynamically added to a parent webContainer (WcFather) trigger a defined event (evFather) of the parent webContainer (wcFather)?
Events can only be triggered from within the class itself - if I understand what you’re describing, you’ll need to use a Method instead.
ok
but how can I call a method of webContainerFather from a child webContainer dynamically added to the parent webContainer ?
I would like an event triggered in the child container to trigger an event in the parent container and possibly in a further parent container that contains the two previous containers
Add a “parentControl” property to your child container that hold a reference to the parent control, and set that property when the child container is embedded within the parent. Then the child will be able to call methods on the parent as needed.
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this solution cannot work if the child containers are created dynamically,
furthermore even if it could work it would be limited to two levels of encapsulation and and you need to check what type the parent container is
if I have 5 levels
contFather5 which contains ,contFather4 which contains, contFather3 which contains, contFather2 which contains contFather1 , which contains contSon
and I want that the event designated ConSon.DesignatedEvent
trigger the ContFather5.DesignatedEvent event
this solution cannot work especially if the various containers are created dynamically
I think I should use delgate or addhandler but I can’t find a good example to understand how to assign (or point) a method/event (with or without parameters) of controlA to a method/event of controlB
see AddHandler,RemoveHandler
you should get the object too with every event.
Example
https://documentation.xojo.com/api/language/addhandler.html#addhandler
this solution cannot work especially if the various containers are created dynamically
have a look at interfaces
ok but
if i create a new event definition on cSon with name cSonNewEvent
then i dynamycally add cSon to webPage or other Contanier and i try to use addHandler, the addHnadler not show me the cSonNewEvent
addHandler cSon.cSonNewEvent is not showed
addHandler cSon… show only
cSon.methods
cSon.properties
Cson.objet
but not show cSon’s Event Definitions
and if i try to use addHandler with methos like this
addHandler cSon.sonMethod, cFather.fathMethos
Dim cs As New cSon
AddHandler cs.sonMethod , CFather.fathMethod
the ide shows me this error
CFather.Shown, line 3
This method doesn’t return a value
AddHandler cs.sonMethod , CFather.fathMethod
CFather.Shown, line 3
cSon.cSon does not have an event named sonMethos
AddHandler cs.sonMethod , CFather.fathMethod
first it comes the event definition as example Action and then you can use a responsible method.
i not see the use of AddressOf in your text.
AddHandler MyTimer.Action, AddressOf TimerAction
TimerAction(sender As Timer)
in addHandler function the first parameter is eventname
AddHandler eventName, delegateMethod
and
addHandler cSon.cSonNewEvent is not showed
you ar right for the addressof but i must use addressof for method linked to event
Don’t rely on autocomplete for everything.
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You still need the addressOf part, just without the parenthesis.
AddHandler csSon.csSonNewEvent, AddressOf cFather.fathMethod
Again, don’t rely on autocomplete. It just doesn’t get this right.
Also, make sure you have a matching RemoveHandler call when you remove this container or else it’ll leak.
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Try using the instance name “cs”
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you’re right, I had the object references completely wrong,
but the problem changes and it still exists
The first parameter of the methods you pass must be of the type of the child. This enables you to have more than one on the parent at the same time and know which one raised the event. So:
FathMethod ( obj as csSon )
I really wish AddHandler could go away (or be deprecated) and require the use of delegates instead. They’re just so much easier to understand and visualize.