compsci_godot_albert/_subsections/sec03/lesson-11.org

Section 03 - Lesson 11, 12 | Signals, Custom Signals

• Links
• Notes
  • Signals
    • connect basics
    • connecting via ide
  • Custom Signals
    • declare the signal
    • activate the signal
    • register to signal

Links

• TOC - Godot Notes
• S03:L22.11 - Signals
• S03:L23.12 - Custom Signals

Notes

Signals

• messaging system
• way of communicating between nodes

connect basics

• means of connecting

  • ide
  • code
• the node giving the signal has a list of everyone that connected

connecting via ide

1. select Node panel on leftside, and then select the approrpiate signal

   • 

2. double click the selected filter

   • options available:

     • from signal
     • connect to script

     • receiver method

       • you can also click on "Pick" next to receiver method so that you can choose a different method that already exists

3. click connect and the boilerplate code will appear in the script you had selected in the signal creation pane above in (2)

   • if you look at the node pane on the right and scroll to the signal, you'll see a green indicator showing that you have connected that signal (to something)

     • 

   • similarly, you can see a green icon by the function in the code editor

     • 

Custom Signals

declare the signal

to create a signal, use the following format:

signal name_of_signal

activate the signal

name_of_signal.emit()

register to signal

• go to the scene you want to attach the signal to
• pick the node
• the signal should be available under Inspector->Node->Signals

• connect the signal, and give the function a name you want, this will be your receiver function

  • if you want to attach another node to the same receiver function, use "pick" when connecting the signal

    • 

• if you have more than one node connected to a receiver function you can see which are connected by clicking on the green icon next to the receiver function

  •