Add a main screen plugin to the plugin demos

plugins/README.md

@@ -11,7 +11,7 @@ Renderer: GLES 2
 
 # How does it work?
 
-This project contains 3 plugins:
+This project contains 4 plugins:
 
 * The custom node plugin shows how to create a custom node type
   using `add_custom_type`. [More info](addons/custom_node).
@@ -22,6 +22,9 @@ This project contains 3 plugins:
 * The material creator plugin shows how to add a custom dock with some
   simple functionality. [More info](addons/material_creator).
 
+* The main screen plugin is a minimal example of how to create a plugin
+  with a main screen. [More info](addons/main_screen).
+
 To use these plugins in another project, copy any of these
 folders to the `addons/` folder in a Godot project, and then
 enable them in the project settings menu.

plugins/addons/main_screen/README.md

@@ -0,0 +1,11 @@
+# Main Screen Plugin Demo
+
+This plugin demo shows how to make a main screen plugin.
+The main screen appears as a button next to the "2D", "3D", "Script", and
+"AssetLib" buttons. It also shows up when a Node it `handles` is selected.
+
+For more information, see this documentation article:
+https://docs.godotengine.org/en/latest/tutorials/plugins/editor/making_main_screen_plugins.html
+
+If you would like to see a more complete example of what main screen plugins
+are capable of, check out the [2.5D demo project](../../../misc/2.5d).

plugins/addons/main_screen/handled_by_main_screen.gd

@@ -0,0 +1 @@
+extends Node

plugins/addons/main_screen/main_panel.tscn

@@ -0,0 +1,20 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://addons/main_screen/print_hello.gd" type="Script" id=1]
+
+[node name="MainPanel" type="CenterContainer"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+size_flags_vertical = 3
+
+[node name="PrintHello" type="Button" parent="."]
+margin_left = 472.0
+margin_top = 290.0
+margin_right = 552.0
+margin_bottom = 310.0
+text = "Print Hello"
+script = ExtResource( 1 )
+__meta__ = {
+"_edit_use_anchors_": false
+}
+[connection signal="pressed" from="PrintHello" to="PrintHello" method="_on_PrintHello_pressed"]

plugins/addons/main_screen/main_screen_plugin.gd

@@ -0,0 +1,41 @@
+tool
+extends EditorPlugin
+
+const MainPanel = preload("res://addons/main_screen/main_panel.tscn")
+
+var main_panel_instance
+
+func _enter_tree():
+	main_panel_instance = MainPanel.instance()
+	# Add the main panel to the editor's main viewport.
+	get_editor_interface().get_editor_viewport().add_child(main_panel_instance)
+	# Hide the main panel. Very much required.
+	make_visible(false)
+
+
+func _exit_tree():
+	if main_panel_instance:
+		main_panel_instance.queue_free()
+
+
+func has_main_screen():
+	return true
+
+
+func make_visible(visible):
+	if main_panel_instance:
+		main_panel_instance.visible = visible
+
+
+# If your plugin doesn't handle any node types, you can remove this method.
+func handles(obj):
+	return obj is preload("res://addons/main_screen/handled_by_main_screen.gd")
+
+
+func get_plugin_name():
+	return "Main Screen Plugin"
+
+
+func get_plugin_icon():
+	# Must return some kind of Texture for the icon.
+	return get_editor_interface().get_base_control().get_icon("Node", "EditorIcons")

plugins/addons/main_screen/plugin.cfg

@@ -0,0 +1,7 @@
+[plugin]
+
+name="Main Screen Plugin Demo"
+description="Demonstrates how to make a main screen plugin."
+author="Aaron Franke, Julian Murgia"
+version="1.0"
+script="main_screen_plugin.gd"

plugins/addons/main_screen/print_hello.gd

@@ -0,0 +1,5 @@
+tool
+extends Button
+
+func _on_PrintHello_pressed():
+	print("Hello from the main screen plugin!")

plugins/project.godot

@@ -17,12 +17,12 @@ _global_script_class_icons={
 
 config/name="Plugin Demos"
 config/description="This contains multiple plugin demos, all placed in a project for convenience."
-run/main_scene="res://custom_node_test.tscn"
+run/main_scene="res://test_scene.tscn"
 config/icon="res://icon.png"
 
 [editor_plugins]
 
-enabled=PoolStringArray( "custom_node", "material_creator", "material_import_plugin" )
+enabled=PoolStringArray( "custom_node", "main_screen", "material_creator", "material_import_plugin" )
 
 [rendering]
 

plugins/test_scene.tscn

@@ -1,15 +1,19 @@
-[gd_scene load_steps=3 format=2]
+[gd_scene load_steps=4 format=2]
 
-[ext_resource path="res://addons/custom_node/heart.gd" type="Script" id=1]
+[ext_resource path="res://addons/main_screen/handled_by_main_screen.gd" type="Script" id=1]
+[ext_resource path="res://addons/custom_node/heart.gd" type="Script" id=2]
 
 [sub_resource type="CubeMesh" id=1]
 
-[node name="CustomNodeTest" type="Node2D"]
+[node name="TestScene" type="Node"]
 
 [node name="Heart" type="Node2D" parent="."]
-script = ExtResource( 1 )
+script = ExtResource( 2 )
 
 [node name="MeshInstance" type="MeshInstance" parent="."]
 mesh = SubResource( 1 )
 skeleton = NodePath("")
 material/0 = null
+
+[node name="HandledByMainScreen" type="Node" parent="."]
+script = ExtResource( 1 )