tab management

Scripts/TabContainer.gd

@@ -0,0 +1,96 @@
+extends HFlowContainer
+
+var tabs: Array[Tab] = []
+var active_tab := 0
+
+const TAB = preload("res://Scenes/Tab.tscn")
+
+const TAB_NORMAL: StyleBoxFlat = preload("res://Scenes/Styles/TabNormal.tres")
+const TAB_HOVER: StyleBoxFlat = preload("res://Scenes/Styles/TabHover.tres")
+
+const TAB_DEFAULT: StyleBoxFlat = preload("res://Scenes/Styles/TabDefault.tres")
+const TAB_HOVER_DEFAULT: StyleBoxFlat = preload("res://Scenes/Styles/TabHoverDefault.tres")
+
+const TAB_GRADIENT: GradientTexture2D = preload("res://Scenes/Styles/TabGradient.tres")
+const TAB_GRADIENT_DEFAULT: GradientTexture2D = preload("res://Scenes/Styles/TabGradientDefault.tres")
+
+@onready var h_box_container: HBoxContainer = $HBoxContainer
+
+func _ready() -> void:
+	tabs.assign(get_tree().get_nodes_in_group("tabs"))
+	set_active_tab(0)
+	
+	for i in tabs.size():
+		tabs[i].tab_pressed.connect(_tab_pressed.bind(i))
+		tabs[i].tab_closed.connect(_tab_closed.bind(i))
+
+func _tab_pressed(index: int) -> void:
+	set_active_tab(index)
+
+func _tab_closed(index: int) -> void:
+	tabs.remove_at(index)
+
+	if tabs.is_empty():
+		get_tree().quit()
+		return
+
+	if index <= active_tab:
+		if index == active_tab:
+			# Closed tab was active, select right neighbor (or last tab if at end)
+			if index >= tabs.size():
+				active_tab = tabs.size() - 1
+			else:
+				active_tab = index
+		else:
+			# Closed tab was before active tab, shift active index down
+			active_tab -= 1
+	
+	# Reconnect signals with updated indices
+	for i in tabs.size():
+		tabs[i].tab_pressed.disconnect(_tab_pressed)
+		tabs[i].tab_closed.disconnect(_tab_closed)
+		tabs[i].tab_pressed.connect(_tab_pressed.bind(i))
+		tabs[i].tab_closed.connect(_tab_closed.bind(i))
+
+	set_active_tab(active_tab)
+
+func set_active_tab(index: int) -> void:
+	# old tab
+	tabs[active_tab].is_active = false
+	tabs[active_tab].button.add_theme_stylebox_override("normal", TAB_DEFAULT)
+	tabs[active_tab].button.add_theme_stylebox_override("pressed", TAB_DEFAULT)
+	tabs[active_tab].button.add_theme_stylebox_override("hover", TAB_HOVER_DEFAULT)
+	tabs[active_tab].gradient_texture.texture = TAB_GRADIENT_DEFAULT
+	# new tab
+	tabs[index].is_active = true
+	tabs[index].button.add_theme_stylebox_override("normal", TAB_NORMAL)
+	tabs[index].button.add_theme_stylebox_override("pressed", TAB_NORMAL)
+	tabs[index].button.add_theme_stylebox_override("hover", TAB_NORMAL)
+	tabs[index].gradient_texture.texture = TAB_GRADIENT
+	
+	active_tab = index
+
+func create_tab() -> void:
+	var index = tabs.size();
+	var tab = TAB.instantiate()
+	tabs.append(tab)
+	tab.tab_pressed.connect(_tab_pressed.bind(index))
+	tab.tab_closed.connect(_tab_closed.bind(index))
+	h_box_container.add_child(tab)
+	
+	set_active_tab(index)
+
+func _input(event: InputEvent) -> void:
+	if Input.is_action_just_pressed("NewTab"):
+		create_tab()
+	if Input.is_action_just_pressed("CloseTab"):
+		tabs[active_tab]._on_close_button_pressed()
+	if Input.is_action_just_pressed("NextTab"):
+		var next_tab = (active_tab + 1) % tabs.size()
+		set_active_tab(next_tab)
+	if Input.is_action_just_pressed("PreviousTab"):
+		var prev_tab = (active_tab - 1 + tabs.size()) % tabs.size()
+		set_active_tab(prev_tab - 1)
+
+func _on_new_tab_button_pressed() -> void:
+	create_tab()