BlueprintImplementable only working in Tick and why 2 Ticks when C++ and BP Class on same Actor

Development Programming & Scripting
1

Hi, I would like to have a BlueprintImplementable function, with which I can execute a BP-Function from C++.

I created a C++ class and based on that a BP Class and attached both to an actor. The classes are USceneComponents.

In the header one function with the property BlueprintImplementable. With an Event I want to inform the C++ class that a Mouse Button was clicked, then this should call FunctionBI and do something in the BPlueprint class.

void EventForMouseClicked();

UFUNCTION(BlueprintImplementableEvent, Category = "MyCategory")
void FunctionBI();

Lets assume I have a simple print Hello in the BluePrint with the overriden FunctionBI.

First issue I have: If I try to do it like this:

MyClass::EventForMouseClicked()
{
  FunctionBI();
}

nothing happens.

If I put it into TickComponent

void MyClass::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
	Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
	FunctionBI();	
}

It executes it forever. So basically the C++ - Blueprint Connection is there.

If I try now to set a variable in order to ensure it doesnt execute always:

MyClass::EventForMouseClicked()
{
  isClicked=true;
}

void MyClass::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
	Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
	
	if(isClicked)
	{
	  FunctionBI();	
	  isCLicked=false;
	}
}

also it doesnt work.

THen I tried to log what kind of value isCLicked has. And there I was surprised:

I have always 2 times a value in the log:

Log: false Log: false

Log: false
Log: false

Log: true Log: false

Log: true
Log: false

and of course the BluePrint function is not executed.

So my questions would be:
Why do I have 2 ticks(?), and why is only one of the variables changing?
Am I doing something wrong (obviously) as it seems nobody ever encountered this :slight_smile:

Thanks in Advance