godot signal
### Godot 3.x / GDScript 1 # signal declaration signal signal_A signal signal_B(param) # Optional; Parameter(s), cannot types hint # To emit signal emit("signal_A") # Can pass parameter(s) emit("signal_B", "variable") # Can pass parameter(s) without declear at signal declaration emit("signal_A", "var1", "var2", "var3") # Can emit from other object object.emit("signal_A") # To connect signal; Return error if connect failed connect("signal_A", self, "on_signal_A") # Can connect from object and boardcast to other object object.connect("signal_B", other, "on_signal_B") # Received function need to accept all parameter(s) func on_signal_A(a = "", b = "", c = ""): print(a + b + c) # To check connection, parameters need to match connect ones; Return boolean is_connect("signal_A", self, "on_signal_A") object.is_connect("signal_B", other, "on_signal_B") # To disconnect signal, parameters need to match connect ones; If object is free, signal will disconnect automatically disconnect("signal_A", self, "on_signal_A") object.disconnect("signal_B", other, "on_signal_B")
