Continue Indicator

Dia:
    "Here, we'll create a little 'Press-to-continue' indicator
    when the dialogue line has finished rendering."
:
    "This small touch helps with player's pacing, and reduces accidental skips."
:
    "The player will know if the dialogue line has finished,
      delay=3
    or if there's more to see."

TL;DR

Create a Label node, prompting the player to continue the dialogue.
On the DialogueLabel's text_rendered signal, hide said Label node.
And on the TheatreStage's progressed signal, show the Label node.

1. Create a Label node. We'll name it ContinueIndicator.

   MyScene
     ├─ TheatreStage
     └─ PanelContainer
           └─ VBoxContainer
               ├─ Label
               ├─ DialogueLabel
               └─ ContinueIndicator
   

   And set the text as a simple "Press space/enter to continue". Since we are progressing the dialogue via the built-in 'ui_accept' input event, which is the space or enter key.

   
   

2. Reference the Label node as continue_indicator in the script.

   @export var continue_indicator: Label
   

   
   

3. Connect the text_rendered signal of the DialogueLabel, to the method _on_dialogue_label_text_rendered().

   func _on_dialogue_label_text_rendered():
       pass # Replace with function body.
   

   In this method, we'll call show() on our continue_indicator.

   func _on_dialogue_label_text_rendered():
       continue_indicator.show()
   

   
   

4. Connect the progressed signal of the TheatreStage, to the method _on_theatre_stage_progressed().

   func _on_theatre_stage_progressed():
       pass # Replace with function body.
   

   Here, we'll call hide() on our continue_indicator.

   func _on_theatre_stage_progressed():
       continue_indicator.hide()
   

5. We are actually done by this point. But, to tidy things up a little, lets add a Control node, right in-between our DialogueLabel and ContinueIndicator node. And lets name it Space.

   MyScene
     ├─ TheatreStage
     └─ PanelContainer
           └─ VBoxContainer
               ├─ Label
               ├─ DialogueLabel
               ├─ Space
               └─ ContinueIndicator
   

   Set its vertical container sizing to Fill, and tick the Expand checkbox.

   • 

   This will 'push down' the press-to-continue label, so that it 'sticks' to the bottom of the container.

   
   

Code Summary

MyScene
  ├─ TheatreStage
  └─ PanelContainer
        └─ VBoxContainer
            ├─ Label
            ├─ DialogueLabel
            ├─ Space
            └─ ContinueIndicator

extends Control

var dlg: Dialogue # Load/create Dialogue here

@export var my_stage: TheatreStage
@export var continue_indicator: Label

func _input(event):
    if event.is_action_pressed("ui_accept"):
        my_stage.progress()

func _ready():
    my_stage.start(dlg)

func _on_dialogue_label_text_rendered():
    continue_indicator.show()

func _on_theatre_stage_progressed():
    continue_indicator.hide()

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