I mean how can I create my own property binding system in my custom blueprint? I want to bind a property value to function, in that function I can use other properties of blueprint. So when some property chanched all dependent properties will change too. I know that it realised in UMG and I can get sourse code… but may be some advices?
Recent engine versions allows to do things like this:
private:
UPROPERTY(EditAnywhere, BlueprintSetter = SetHealth, BlueprintGetter = GetHealth)
float Health;
public:
UFUNCTION(BlueprintSetter)
void SetHealth(float NewHealth);
UFUNCTION(BlueprintGetter)
float GetHealth();
That will expose your custom function as a replacement to those “GET” or “SET” little nodes you see on Blueprint Graphs.
It’s not what I want 
In UMG we can bind text on text widget, e.g. bind text to player health. If player health change then text on text widget will automatically change too. So I want to create this binding
I think what you want to look at is the PROPERTY_BINDING_IMPLEMENTATION macro. Look at TextBlock.cpp/h and see how the binding is setup. I never done it myself but it looks fairly simple.
It’s a long time，but I have a similar idea right now. I want to make a plugin with a actor component，that has a property can be binded with function to change its value，just work like some property in UMG. Do you have solve this problem？
I describe I have done.
I create a new actor component class，and code like this：
But，the macro in last line is error，can not be compiled.
I have include “Components/Widget.h” ，and reshape tip like this.
and annoted the macro whith error，live compile as this，
the property and the delegate are not binded，and the delegate can not custom.
so,what can i do to fix it?