Replaced the TabContainer with a Tabs control

- Load material can now load several materials
- the current tab now has a close button

addons/procedural_material/graph_edit.gd

@@ -66,6 +66,8 @@ func remove_node(node):
 # Global operations on graph
 
 func update_tab_title():
+	if !get_parent().has_method("set_tab_title"):
+		return
 	var title = "[unnamed]"
 	if save_path != null:
 		title = save_path.right(save_path.rfind("/")+1)
@@ -77,7 +79,6 @@ func update_tab_title():
 func set_need_save(ns):
 	if ns != need_save:
 		need_save = ns
-		if get_parent() is TabContainer:
 		update_tab_title()
 
 func set_save_path(path):

addons/procedural_material/main_window.gd

@@ -1,7 +1,7 @@
 tool
 extends Panel
 
-var current_tab = -1
+var current_tab = null
 
 const MENU = [
 	{ menu="File", command="new_material", description="New material" },
@@ -89,11 +89,16 @@ func load_material():
 	add_child(dialog)
 	dialog.rect_min_size = Vector2(500, 500)
 	dialog.access = FileDialog.ACCESS_FILESYSTEM
-	dialog.mode = FileDialog.MODE_OPEN_FILE
+	dialog.mode = FileDialog.MODE_OPEN_FILES
 	dialog.add_filter("*.ptex;Procedural textures file")
-	dialog.connect("file_selected", self, "do_load_material")
+	#dialog.connect("file_selected", self, "do_load_material")
+	dialog.connect("files_selected", self, "do_load_materials")
 	dialog.popup_centered()
 
+func do_load_materials(filenames):
+	for f in filenames:
+		do_load_material(f)
+
 func do_load_material(filename):
 	var graph_edit = $VBoxContainer/HBoxContainer/Projects.get_current_tab_control()
 	var node_count = 0
@@ -120,9 +125,7 @@ func save_material_as():
 		graph_edit.save_file_as()
 
 func close_material():
-	var graph_edit = $VBoxContainer/HBoxContainer/Projects.get_current_tab_control()
-	if graph_edit != null:
-		graph_edit.queue_free()
+	$VBoxContainer/HBoxContainer/Projects.close_tab()
 
 func export_material():
 	var graph_edit = $VBoxContainer/HBoxContainer/Projects.get_current_tab_control()
@@ -245,11 +248,13 @@ func update_preview_2d(node = null):
 		graph_edit.setup_material(preview.get_2d_material(), node.get_textures(), node.generate_shader())
 
 func _on_Projects_tab_changed(tab):
-	if tab != current_tab:
+	var new_tab = $VBoxContainer/HBoxContainer/Projects.get_current_tab_control()
+	if new_tab != current_tab:
+		if new_tab != null:
 			for c in get_incoming_connections():
 				if c.method_name == "update_preview" or c.method_name == "update_preview_2d":
 					c.source.disconnect(c.signal_name, self, c.method_name)
-		$VBoxContainer/HBoxContainer/Projects.get_current_tab_control().connect("graph_changed", self, "update_preview")
-		$VBoxContainer/HBoxContainer/Projects.get_current_tab_control().connect("node_selected", self, "update_preview_2d")
-		current_tab = tab
+			new_tab.connect("graph_changed", self, "update_preview")
+			new_tab.connect("node_selected", self, "update_preview_2d")
+		current_tab = new_tab
 		update_preview()

addons/procedural_material/main_window.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=4 format=2]
+[gd_scene load_steps=5 format=2]
 
 [ext_resource path="res://addons/procedural_material/main_window.gd" type="Script" id=1]
 [ext_resource path="res://addons/procedural_material/library.gd" type="Script" id=2]
 [ext_resource path="res://addons/procedural_material/preview.tscn" type="PackedScene" id=3]
+[ext_resource path="res://addons/procedural_material/widgets/tabs.gd" type="Script" id=4]
 
 [node name="MainWindow" type="Panel" index="0"]
 
@@ -222,7 +223,7 @@ margin_top = 354.0
 margin_right = 314.0
 margin_bottom = 696.0
 
-[node name="Projects" type="TabContainer" parent="VBoxContainer/HBoxContainer" index="1"]
+[node name="Projects" type="Panel" parent="VBoxContainer/HBoxContainer" index="1"]
 
 anchor_left = 0.0
 anchor_top = 0.0
@@ -238,16 +239,41 @@ mouse_default_cursor_shape = 0
 size_flags_horizontal = 3
 size_flags_vertical = 3
 size_flags_stretch_ratio = 3.0
+script = ExtResource( 4 )
+_sections_unfolded = [ "custom_styles" ]
+
+[node name="Tabs" type="Tabs" parent="VBoxContainer/HBoxContainer/Projects" index="1"]
+
+anchor_left = 0.0
+anchor_top = 0.0
+anchor_right = 0.0
+anchor_bottom = 0.0
+margin_right = 954.0
+margin_bottom = 23.0
+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
 tab_align = 0
-tabs_visible = true
-_sections_unfolded = [ "Size Flags" ]
+tab_close_display_policy = 1
+scrolling_enabled = true
+
+[connection signal="no_more_tabs" from="VBoxContainer/HBoxContainer/Projects" to="." method="new_material"]
+
+[connection signal="resized" from="VBoxContainer/HBoxContainer/Projects" to="VBoxContainer/HBoxContainer/Projects" method="_on_Projects_resized"]
 
 [connection signal="tab_changed" from="VBoxContainer/HBoxContainer/Projects" to="." method="_on_Projects_tab_changed"]
 
-[connection signal="tab_selected" from="VBoxContainer/HBoxContainer/Projects" to="." method="_on_Projects_tab_changed"]
-
 [connection signal="connection_request" from="VBoxContainer/HBoxContainer/Projects/GraphEdit" to="VBoxContainer/HBoxContainer/Projects/GraphEdit" method="connect_node"]
 
 [connection signal="disconnection_request" from="VBoxContainer/HBoxContainer/Projects/GraphEdit" to="VBoxContainer/HBoxContainer/Projects/GraphEdit" method="disconnect_node"]
 
+[connection signal="reposition_active_tab_request" from="VBoxContainer/HBoxContainer/Projects/Tabs" to="VBoxContainer/HBoxContainer/Projects" method="move_active_tab_to"]
+
+[connection signal="tab_changed" from="VBoxContainer/HBoxContainer/Projects/Tabs" to="VBoxContainer/HBoxContainer/Projects" method="set_current_tab"]
+
+[connection signal="tab_close" from="VBoxContainer/HBoxContainer/Projects/Tabs" to="VBoxContainer/HBoxContainer/Projects" method="close_tab"]
+
 

addons/procedural_material/nodes/noise.gd

@@ -10,7 +10,6 @@ func _ready():
 		$HBoxContainer1/size.add_item(str(int(pow(2, 5+i))), i)
 	$HBoxContainer1/size.selected = size
 	initialize_properties([ $HBoxContainer1/size, $HBoxContainer2/density ])
-	print(size)
 
 func _get_shader_code(uv):
 	var rv = { defs="", code="" }

addons/procedural_material/widgets/tabs.gd

@@ -0,0 +1,66 @@
+tool
+extends Panel
+
+var current_tab = -1 setget set_current_tab
+
+signal tab_changed
+signal no_more_tabs
+
+func _ready():
+	pass
+
+func add_child(control):
+	.add_child(control)
+	if !(control is Tabs):
+		$Tabs.add_tab(control.name)
+		move_child(control, $Tabs.get_tab_count()-1)
+
+func close_tab(tab = null):
+	if tab == null:
+		tab = $Tabs.get_current_tab()
+	get_child(tab).queue_free()
+	$Tabs.remove_tab(tab)
+	var control = get_child(tab)
+	remove_child(control)
+	control.free()
+	current_tab = -1
+	if $Tabs.get_tab_count() == 0:
+		emit_signal("no_more_tabs")
+	else:
+		set_current_tab(0)
+
+func move_active_tab_to(idx_to):
+	$Tabs.move_tab(current_tab, idx_to)
+	move_child(get_child(current_tab), idx_to)
+	set_current_tab(idx_to)
+
+func set_current_tab(t):
+	if t == current_tab:
+		return
+	var node
+	if current_tab >= 0 && current_tab < $Tabs.get_tab_count():
+		node = get_child(current_tab)
+		node.visible = false
+	current_tab = t
+	if current_tab >= 0 && current_tab < $Tabs.get_tab_count():
+		node = get_child(current_tab)
+		node.visible = true
+		node.rect_position = Vector2(0, $Tabs.rect_size.y)
+		node.rect_size = rect_size - node.rect_position
+	else:
+		print("Incorrect current tab "+str(current_tab))
+	$Tabs.current_tab = current_tab
+	emit_signal("tab_changed", current_tab)
+
+func set_tab_title(index, title):
+	$Tabs.set_tab_title(index, title)
+
+func get_current_tab_control():
+	return get_child(current_tab)
+
+func _on_Tabs_tab_changed(tab):
+	set_current_tab(tab)
+
+func _on_Projects_resized():
+	$Tabs.rect_size.x = rect_size.x
+