Node editor updates and support for alpha channel

Added initial support for alpha channel (in combine, decompose and blend nodes). Textures with alpha channels can be exported using the material node albedo input.
Updated node editor with a simple editor for enumerated parameters.

addons/material_maker/main_window.tscn

@@ -7,7 +7,7 @@
 [ext_resource path="res://addons/material_maker/renderer.tscn" type="PackedScene" id=5]
 [ext_resource path="res://addons/material_maker/node_factory.gd" type="Script" id=6]
 
-[node name="MainWindow" type="Panel" index="0"]
+[node name="MainWindow" type="Panel"]
 
 anchor_left = 0.0
 anchor_top = 0.0

addons/material_maker/node_base.gd

@@ -116,15 +116,15 @@ func get_source_f(source):
 	var rv
 	if source.has("f"):
 		rv = source.f
-	elif source.has("rgb"):
+	elif source.has("rgb") or source.has("rgba"):
 		rv = "dot("+source.rgb+", vec3(1.0))/3.0"
 	else:
 		rv = "***error***"
 	return rv
-	
+
 func get_source_rgb(source):
 	var rv
-	if source.has("rgb"):
+	if source.has("rgb") or source.has("rgba"):
 		rv = source.rgb
 	elif source.has("f"):
 		rv = "vec3("+source.f+")"
@@ -132,6 +132,18 @@ func get_source_rgb(source):
 		rv = "***error***"
 	return rv
 
+func get_source_rgba(source):
+	var rv
+	if source.has("rgba"):
+		rv = source.rgba
+	elif source.has("rgb"):
+		rv = "vec4("+source.rgb+", 1.0)"
+	elif source.has("f"):
+		rv = "vec4(vec3("+source.f+"), 1.0)"
+	else:
+		rv = "***error***"
+	return rv
+
 func reset():
 	generated = false
 	generated_variants = []
@@ -145,13 +157,17 @@ func get_shader_code(uv, slot = 0):
 	if !rv.has("f"):
 		if rv.has("rgb"):
 			rv.f = "(dot("+rv.rgb+", vec3(1.0))/3.0)"
+		elif rv.has("rgba"):
+			rv.f = "(dot("+rv.rgba+".rgb, vec3(1.0))/3.0)"
 		else:
 			rv.f = "0.0"
 	if !rv.has("rgb"):
-		if rv.has("f"):
+		if rv.has("rgba"):
-			rv.rgb = "vec3("+rv.f+")"
+			rv.rgb = rv.rgba+".rgb"
 		else:
-			rv.f = "vec3(0.0)"
+			rv.rgb = "vec3("+rv.f+")"
+	if !rv.has("rgba"):
+		rv.rgba = "vec4("+rv.rgb+", 1.0)"
 	return rv
 
 func get_shader_code_with_globals(uv, slot = 0):

addons/material_maker/nodes/blend/blend.gd

@@ -43,8 +43,8 @@ func _get_shader_code(uv):
 		variant_index = generated_variants.size()
 		generated_variants.append(uv)
 		rv.code = src0_code.code+src1_code.code+src2_code.code
-		rv.code += "vec3 %s_%d_rgb = blend_%s(%s, %s, %s, %s);\n" % [ name, variant_index, BLEND_TYPES[parameters.blend_type].shortname, uv, src0_code.rgb, src1_code.rgb, amount_str ]
+		rv.code += "vec4 %s_%d_rgba = vec4(blend_%s(%s, %s, %s, %s * %s.a), min(1.0, %s.a + %s * %s.a));\n" % [ name, variant_index, BLEND_TYPES[parameters.blend_type].shortname, uv, src0_code.rgb, src1_code.rgb, amount_str, src0_code.rgba, src1_code.rgba, amount_str, src0_code.rgba ]
-	rv.rgb = "%s_%d_rgb" % [ name, variant_index ]
+	rv.rgba = "%s_%d_rgba" % [ name, variant_index ]
 	return rv
 
 func _get_state_variables():

addons/material_maker/nodes/combine/combine.gd

@@ -6,19 +6,24 @@ func _get_shader_code(uv):
 	var src0 = get_source(0)
 	var src1 = get_source(1)
 	var src2 = get_source(2)
+	var src3 = get_source(3)
 	var src0_code = { defs="", code="", f="0.0" }
 	var src1_code = { defs="", code="", f="0.0" }
 	var src2_code = { defs="", code="", f="0.0" }
+	var src3_code = { defs="", code="", f="1.0" }
 	if src0 != null:
 		src0_code = src0.get_shader_code(uv)
 	if src1 != null:
 		src1_code = src1.get_shader_code(uv)
 	if src2 != null:
 		src2_code = src2.get_shader_code(uv)
+	if src3 != null:
+		src3_code = src3.get_shader_code(uv)
 	if generated_variants.empty():
 		rv.defs = src0_code.defs;
 		rv.defs += src1_code.defs;
 		rv.defs += src2_code.defs;
+		rv.defs += src3_code.defs;
 	var variant_index = generated_variants.find(uv)
 	if variant_index == -1:
 		variant_index = generated_variants.size()
@@ -26,6 +31,7 @@ func _get_shader_code(uv):
 		rv.code = src0_code.code
 		rv.code += src1_code.code
 		rv.code += src2_code.code
-		rv.code += "vec3 %s_%d_rgb = vec3(%s, %s, %s);\n" % [ name, variant_index, src0_code.f, src1_code.f, src2_code.f ]
+		rv.code += src3_code.code
-	rv.rgb = "%s_%d_rgb" % [ name, variant_index ]
+		rv.code += "vec4 %s_%d_rgba = vec4(%s, %s, %s, %s);\n" % [ name, variant_index, src0_code.f, src1_code.f, src2_code.f, src3_code.f ]
+	rv.rgba = "%s_%d_rgba" % [ name, variant_index ]
 	return rv

addons/material_maker/nodes/combine/combine.tscn

@@ -2,7 +2,6 @@
 
 [ext_resource path="res://addons/material_maker/nodes/combine/combine.gd" type="Script" id=1]
 
-
 [sub_resource type="Theme" id=1]
 
 
@@ -35,7 +34,7 @@ slot/0/left_type = 0
 slot/0/left_color = Color( 0.756863, 0.756863, 0.756863, 1 )
 slot/0/right_enabled = true
 slot/0/right_type = 0
-slot/0/right_color = Color( 0.5, 0.5, 1, 1 )
+slot/0/right_color = Color( 0.414353, 1, 0.388902, 0.353608 )
 slot/1/left_enabled = true
 slot/1/left_type = 0
 slot/1/left_color = Color( 0.756863, 0.756863, 0.756863, 1 )
@@ -48,8 +47,14 @@ slot/2/left_color = Color( 0.756863, 0.756863, 0.756863, 1 )
 slot/2/right_enabled = false
 slot/2/right_type = 0
 slot/2/right_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/3/left_enabled = true
+slot/3/left_type = 0
+slot/3/left_color = Color( 0.756863, 0.756863, 0.756863, 1 )
+slot/3/right_enabled = false
+slot/3/right_type = 0
+slot/3/right_color = Color( 1, 1, 1, 1 )
 script = ExtResource( 1 )
-_sections_unfolded = [ "Theme", "slot", "slot/0", "slot/1", "slot/2" ]
+_sections_unfolded = [ "Theme", "slot", "slot/0", "slot/1", "slot/2", "slot/3" ]
 
 [node name="R" type="Label" parent="." index="0"]
 
@@ -114,4 +119,25 @@ percent_visible = 1.0
 lines_skipped = 0
 max_lines_visible = -1
 
+[node name="A" type="Label" parent="." index="3"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 16.0
+margin_top = 68.0
+margin_right = 86.0
+margin_bottom = 82.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
+text = "A"
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
 

addons/material_maker/nodes/decompose/decompose.gd

@@ -1,12 +1,12 @@
 tool
 extends "res://addons/material_maker/node_base.gd"
 
-const OUTPUTS = [ "r", "g", "b" ]
+const OUTPUTS = [ "r", "g", "b", "a" ]
 
 func _get_shader_code(uv, output = 0):
 	var rv = { defs="", code="" }
 	var src = get_source()
-	var src_code = { defs="", code="", f="0.0" }
+	var src_code = { defs="", code="", rgba="vec4(0.0)" }
 	if src != null:
 		src_code = src.get_shader_code(uv)
 	if generated_variants.empty():
@@ -16,6 +16,6 @@ func _get_shader_code(uv, output = 0):
 		variant_index = generated_variants.size()
 		generated_variants.append(uv)
 		rv.code = src_code.code
-		rv.code += "vec3 %s_%d_rgb = %s;\n" % [ name, variant_index, src_code.rgb ]
+		rv.code += "vec4 %s_%d_rgba = %s;\n" % [ name, variant_index, src_code.rgba ]
-	rv.f = "%s_%d_rgb.%s" % [ name, variant_index, OUTPUTS[output] ]
+	rv.f = "%s_%d_rgba.%s" % [ name, variant_index, OUTPUTS[output] ]
 	return rv

addons/material_maker/nodes/decompose/decompose.tscn

@@ -2,11 +2,10 @@
 
 [ext_resource path="res://addons/material_maker/nodes/decompose/decompose.gd" type="Script" id=1]
 
-
 [sub_resource type="Theme" id=1]
 
 
-[node name="Decompose" type="GraphNode" index="0"]
+[node name="Decompose" type="GraphNode"]
 
 anchor_left = 0.0
 anchor_top = 0.0
@@ -32,7 +31,7 @@ comment = false
 overlay = 0
 slot/0/left_enabled = true
 slot/0/left_type = 0
-slot/0/left_color = Color( 0.498039, 0.498039, 1, 1 )
+slot/0/left_color = Color( 0.411765, 1, 0.388235, 0.352941 )
 slot/0/right_enabled = true
 slot/0/right_type = 0
 slot/0/right_color = Color( 0.756863, 0.756863, 0.756863, 1 )
@@ -48,8 +47,14 @@ slot/2/left_color = Color( 0.756863, 0.756863, 0.756863, 1 )
 slot/2/right_enabled = true
 slot/2/right_type = 0
 slot/2/right_color = Color( 0.756863, 0.756863, 0.756863, 1 )
+slot/3/left_enabled = false
+slot/3/left_type = 0
+slot/3/left_color = Color( 1, 1, 1, 1 )
+slot/3/right_enabled = true
+slot/3/right_type = 0
+slot/3/right_color = Color( 0.756863, 0.756863, 0.756863, 1 )
 script = ExtResource( 1 )
-_sections_unfolded = [ "Theme", "slot", "slot/0", "slot/1", "slot/2" ]
+_sections_unfolded = [ "Theme", "slot", "slot/0", "slot/1", "slot/2", "slot/3" ]
 
 [node name="R" type="Label" parent="." index="0"]
 
@@ -117,4 +122,26 @@ percent_visible = 1.0
 lines_skipped = 0
 max_lines_visible = -1
 
+[node name="A" type="Label" parent="." index="3"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 16.0
+margin_top = 68.0
+margin_right = 106.0
+margin_bottom = 82.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
+text = "A"
+align = 2
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
 

addons/material_maker/nodes/material/material.tscn

@@ -2,7 +2,6 @@
 
 [ext_resource path="res://addons/material_maker/nodes/material/material.gd" type="Script" id=1]
 
-
 [sub_resource type="Theme" id=1]
 
 
@@ -30,13 +29,13 @@ comment = false
 overlay = 0
 slot/0/left_enabled = false
 slot/0/left_type = 0
-slot/0/left_color = Color( 0.5, 0.5, 1, 1 )
+slot/0/left_color = Color( 0.411765, 1, 0.388235, 0.352941 )
 slot/0/right_enabled = false
 slot/0/right_type = 0
 slot/0/right_color = Color( 0.5, 0.5, 1, 1 )
 slot/1/left_enabled = true
 slot/1/left_type = 0
-slot/1/left_color = Color( 0.5, 0.5, 1, 1 )
+slot/1/left_color = Color( 0.411765, 1, 0.388235, 0.352941 )
 slot/1/right_enabled = false
 slot/1/right_type = 0
 slot/1/right_color = Color( 0.5, 0.5, 1, 1 )
@@ -72,12 +71,12 @@ slot/6/right_type = 0
 slot/6/right_color = Color( 0.498039, 0.498039, 1, 1 )
 slot/7/left_enabled = true
 slot/7/left_type = 0
-slot/7/left_color = Color( 0.494118, 0.494118, 1, 1 )
+slot/7/left_color = Color( 0.756863, 0.756863, 0.756863, 1 )
 slot/7/right_enabled = false
 slot/7/right_type = 0
 slot/7/right_color = Color( 0.494118, 0.494118, 1, 1 )
 script = ExtResource( 1 )
-_sections_unfolded = [ "Theme", "slot", "slot/0", "slot/1", "slot/2", "slot/5" ]
+_sections_unfolded = [ "Theme", "slot", "slot/0", "slot/1", "slot/2", "slot/5", "slot/7" ]
 
 [node name="resolution" type="OptionButton" parent="." index="0"]
 

addons/material_maker/nodes/node_generic.gd

@@ -157,7 +157,7 @@ func _get_shader_code(uv, slot = 0):
 
 func get_globals():
 	var list = .get_globals()
-	if model_data.has("global") and list.find(model_data.global) == -1:
+	if typeof(model_data) == TYPE_DICTIONARY and model_data.has("global") and list.find(model_data.global) == -1:
 		list.append(model_data.global)
 	return list
 

addons/material_maker/renderer.gd

@@ -21,7 +21,7 @@ static func generate_shader(src_code):
 	var shader_code = src_code.defs
 	shader_code += "void fragment() {\n"
 	shader_code += src_code.code
-	shader_code += "COLOR = vec4("+src_code.rgb+", 1.0);\n"
+	shader_code += "COLOR = "+src_code.rgba+";\n"
 	shader_code += "}\n"
 	#print("GENERATED SHADER:\n"+shader_code)
 	code += shader_code

addons/material_maker/renderer.tscn

@@ -16,13 +16,13 @@ void fragment() {
 render_priority = 0
 shader = SubResource( 1 )
 
-[node name="Renderer" type="Viewport"]
+[node name="Renderer" type="Viewport" index="0"]
 
 arvr = false
 size = Vector2( 0, 0 )
 own_world = true
 world = null
-transparent_bg = false
+transparent_bg = true
 msaa = 2
 hdr = false
 disable_3d = false

addons/material_maker/widgets/node_editor/enum_editor.gd

@@ -0,0 +1,12 @@
+tool
+extends WindowDialog
+
+signal ok
+
+func set_value(n, v):
+	$VBoxContainer/GridContainer/name.text = n
+	$VBoxContainer/GridContainer/value.text = v
+
+func _on_OK_pressed():
+	emit_signal("ok", $VBoxContainer/GridContainer/name.text, $VBoxContainer/GridContainer/value.text)
+	queue_free()

addons/material_maker/widgets/node_editor/enum_editor.tscn

@@ -0,0 +1,220 @@
+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://addons/material_maker/widgets/node_editor/enum_editor.gd" type="Script" id=1]
+
+[node name="EnumEditor" type="WindowDialog" index="0"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_right = 137.0
+margin_bottom = 79.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 0
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+popup_exclusive = true
+window_title = "Enum Editor"
+resizable = false
+script = ExtResource( 1 )
+_sections_unfolded = [ "Popup" ]
+
+[node name="VBoxContainer" type="VBoxContainer" parent="." index="1"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 1
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+alignment = 0
+
+[node name="GridContainer" type="GridContainer" parent="VBoxContainer" index="0"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_right = 137.0
+margin_bottom = 52.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 1
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+columns = 2
+
+[node name="Label1" type="Label" parent="VBoxContainer/GridContainer" index="0"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_top = 5.0
+margin_right = 42.0
+margin_bottom = 19.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
+text = "Name:"
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
+[node name="name" type="LineEdit" parent="VBoxContainer/GridContainer" index="1"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 46.0
+margin_right = 137.0
+margin_bottom = 24.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+focus_mode = 2
+mouse_filter = 0
+mouse_default_cursor_shape = 1
+size_flags_horizontal = 3
+size_flags_vertical = 1
+focus_mode = 2
+context_menu_enabled = true
+placeholder_alpha = 0.6
+caret_blink = false
+caret_blink_speed = 0.65
+caret_position = 0
+
+[node name="Label2" type="Label" parent="VBoxContainer/GridContainer" index="2"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_top = 33.0
+margin_right = 42.0
+margin_bottom = 47.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 2
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 4
+text = "Value:"
+percent_visible = 1.0
+lines_skipped = 0
+max_lines_visible = -1
+
+[node name="value" type="LineEdit" parent="VBoxContainer/GridContainer" index="3"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 46.0
+margin_top = 28.0
+margin_right = 137.0
+margin_bottom = 52.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+focus_mode = 2
+mouse_filter = 0
+mouse_default_cursor_shape = 1
+size_flags_horizontal = 3
+size_flags_vertical = 1
+focus_mode = 2
+context_menu_enabled = true
+placeholder_alpha = 0.6
+caret_blink = false
+caret_blink_speed = 0.65
+caret_position = 0
+
+[node name="HBoxContainer" type="HBoxContainer" parent="VBoxContainer" index="1"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 6.0
+margin_top = 56.0
+margin_right = 130.0
+margin_bottom = 76.0
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+mouse_filter = 1
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 4
+size_flags_vertical = 0
+alignment = 0
+_sections_unfolded = [ "Size Flags" ]
+
+[node name="OK" type="Button" parent="VBoxContainer/HBoxContainer" index="0"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_right = 60.0
+margin_bottom = 20.0
+rect_min_size = Vector2( 60, 0 )
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+focus_mode = 2
+mouse_filter = 0
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+toggle_mode = false
+enabled_focus_mode = 2
+shortcut = null
+group = null
+text = "OK"
+flat = false
+align = 1
+_sections_unfolded = [ "Rect" ]
+
+[node name="Cancel" type="Button" parent="VBoxContainer/HBoxContainer" index="1"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_left = 64.0
+margin_right = 124.0
+margin_bottom = 20.0
+rect_min_size = Vector2( 60, 0 )
+rect_pivot_offset = Vector2( 0, 0 )
+rect_clip_content = false
+focus_mode = 2
+mouse_filter = 0
+mouse_default_cursor_shape = 0
+size_flags_horizontal = 1
+size_flags_vertical = 1
+toggle_mode = false
+enabled_focus_mode = 2
+shortcut = null
+group = null
+text = "Cancel"
+flat = false
+align = 1
+_sections_unfolded = [ "Rect" ]
+
+[connection signal="text_entered" from="VBoxContainer/GridContainer/name" to="." method="_on_LineEdit_text_entered"]
+
+[connection signal="text_entered" from="VBoxContainer/GridContainer/value" to="." method="_on_LineEdit_text_entered"]
+
+[connection signal="pressed" from="VBoxContainer/HBoxContainer/OK" to="." method="_on_OK_pressed"]
+
+[connection signal="pressed" from="VBoxContainer/HBoxContainer/Cancel" to="." method="queue_free"]
+
+

addons/material_maker/widgets/node_editor/node_editor.tscn

@@ -3,7 +3,7 @@
 [ext_resource path="res://addons/material_maker/widgets/node_editor/node_editor.gd" type="Script" id=1]
 [ext_resource path="res://addons/material_maker/icons/plus.png" type="Texture" id=2]
 
-[node name="NodeEditor" type="WindowDialog" index="0"]
+[node name="NodeEditor" type="WindowDialog"]
 
 anchor_left = 0.0
 anchor_top = 0.0

addons/material_maker/widgets/node_editor/parameter.gd

@@ -5,8 +5,18 @@ var size_first = 0
 var size_last = 12
 var size_default = 8
 
+var enum_values = null
+var enum_current = 0
+
 const PARAMETER_TYPE = [ "float", "size", "enum", "boolean" ]
 
+const ENUM_ADD = -1
+const ENUM_EDIT = -2
+const ENUM_REMOVE = -3
+const ENUM_UP = -4
+const ENUM_DOWN = -5
+
+
 func _ready():
 	pass
 
@@ -66,6 +76,9 @@ func set_model_data(data):
 	elif data.type == "enum":
 		$Type.selected = 2
 		w = $Types/T2
+		data = data.duplicate()
+		enum_values = data.values
+		update_enum_list()
 	elif data.type == "boolean":
 		$Type.selected = 3
 		w = $Types/T3
@@ -88,12 +101,72 @@ func get_model_data():
 		data.first =  size_first
 		data.last =  size_last
 		data.default =  size_default
+	elif $Type.selected == 2:
+		data.values = enum_values
 	return data
 
 func _on_Delete_pressed():
 	queue_free()
 
-func _on_OptionButton_item_selected(ID):
+func _on_Type_item_selected(ID):
 	for c in $Types.get_children():
 		c.visible = "T"+str(ID) == c.name
 
+func update_enum_list():
+	var options = $Types/T2/EnumValues
+	options.clear()
+	if !enum_values.empty():
+		for i in range(enum_values.size()):
+			var v = enum_values[i]
+			options.add_item(v.name+" ("+v.value+")", i)
+		options.add_separator()
+		var v = enum_values[enum_current]
+		options.add_item("Edit "+v.value, ENUM_EDIT)
+		options.add_item("Remove "+v.value, ENUM_REMOVE)
+		if enum_current > 0:
+			options.add_item("Move "+v.value+" up", ENUM_UP)
+		if enum_current < enum_values.size() - 1:
+			options.add_item("Move "+v.value+" down", ENUM_DOWN)
+		options.add_separator()
+	options.add_item("Add value", ENUM_ADD)
+	options.selected = enum_current
+
+func _on_EnumValues_item_selected(id):
+	id = $Types/T2/EnumValues.get_item_id(id)
+	if id >= 0 and id < enum_values.size():
+		enum_current = id
+	elif id == ENUM_EDIT:
+		var dialog = load("res://addons/material_maker/widgets/node_editor/enum_editor.tscn").instance()
+		var v = enum_values[enum_current]
+		add_child(dialog)
+		dialog.set_value(v.name, v.value)
+		dialog.connect("ok", self, "update_enum_value", [ enum_current ])
+		dialog.popup_centered()
+	elif id == ENUM_ADD:
+		var dialog = load("res://addons/material_maker/widgets/node_editor/enum_editor.tscn").instance()
+		add_child(dialog)
+		dialog.connect("ok", self, "update_enum_value", [ -1 ])
+		dialog.popup_centered()
+	elif id == ENUM_REMOVE:
+		enum_values.remove(enum_current)
+		enum_current = 0
+	elif id == ENUM_UP:
+		var tmp = enum_values[enum_current]
+		enum_values[enum_current] = enum_values[enum_current-1]
+		enum_values[enum_current-1] = tmp
+		enum_current -= 1
+	elif id == ENUM_DOWN:
+		var tmp = enum_values[enum_current]
+		enum_values[enum_current] = enum_values[enum_current+1]
+		enum_values[enum_current+1] = tmp
+		enum_current += 1
+	update_enum_list()
+
+func update_enum_value(n, v, i):
+	if i == -1:
+		enum_values.append({ name=n, value=v })
+		enum_current = enum_values.size()-1
+	else:
+		enum_values[i] = { name=n, value=v }
+		enum_current = i
+	update_enum_list()

addons/material_maker/widgets/node_editor/parameter.tscn

@@ -3,7 +3,7 @@
 [ext_resource path="res://addons/material_maker/widgets/node_editor/parameter.gd" type="Script" id=1]
 [ext_resource path="res://addons/material_maker/icons/minus.png" type="Texture" id=2]
 
-[node name="Parameter" type="HBoxContainer" index="0"]
+[node name="Parameter" type="HBoxContainer"]
 
 anchor_left = 0.0
 anchor_top = 0.0
@@ -370,6 +370,7 @@ align = 0
 
 [node name="T1" type="HBoxContainer" parent="Types" index="1"]
 
+editor/display_folded = true
 visible = false
 anchor_left = 0.0
 anchor_top = 0.0
@@ -527,7 +528,6 @@ selected = -1
 
 [node name="T2" type="HBoxContainer" parent="Types" index="2"]
 
-editor/display_folded = true
 visible = false
 anchor_left = 0.0
 anchor_top = 0.0
@@ -543,7 +543,7 @@ size_flags_horizontal = 1
 size_flags_vertical = 1
 alignment = 0
 
-[node name="OptionButton" type="OptionButton" parent="Types/T2" index="0"]
+[node name="EnumValues" type="OptionButton" parent="Types/T2" index="0"]
 
 anchor_left = 0.0
 anchor_top = 0.0
@@ -611,7 +611,7 @@ align = 0
 
 [connection signal="pressed" from="Delete" to="." method="_on_Delete_pressed"]
 
-[connection signal="item_selected" from="Type" to="." method="_on_OptionButton_item_selected"]
+[connection signal="item_selected" from="Type" to="." method="_on_Type_item_selected"]
 
 [connection signal="item_selected" from="Types/T1/First" to="." method="_on_First_item_selected"]
 
@@ -619,4 +619,6 @@ align = 0
 
 [connection signal="item_selected" from="Types/T1/Default" to="." method="_on_Default_item_selected"]
 
+[connection signal="item_selected" from="Types/T2/EnumValues" to="." method="_on_EnumValues_item_selected"]
+
 

addons/material_maker/widgets/text_dialog.tscn

@@ -2,7 +2,7 @@
 
 [ext_resource path="res://addons/material_maker/widgets/text_dialog.gd" type="Script" id=1]
 
-[node name="TextDialog" type="WindowDialog"]
+[node name="TextDialog" type="WindowDialog" index="0"]
 
 anchor_left = 0.0
 anchor_top = 0.0
@@ -16,10 +16,11 @@ mouse_filter = 0
 mouse_default_cursor_shape = 0
 size_flags_horizontal = 1
 size_flags_vertical = 1
-popup_exclusive = false
+popup_exclusive = true
 window_title = "blah"
 resizable = false
 script = ExtResource( 1 )
+_sections_unfolded = [ "Popup", "Rect" ]
 
 [node name="VBoxContainer" type="VBoxContainer" parent="." index="1"]