Merge pull request #27 from OverloadedOrama/show-more-than-one-tab

Add an option to always have the tabs visible, if a panel has more than one tab

addons/dockable_container/dockable_container.gd

@@ -29,7 +29,18 @@ const DragNDropPanel := preload("drag_n_drop_panel.gd")
 		_tabs_visible = value
 		for i in range(1, _panel_container.get_child_count()):
 			var panel := _panel_container.get_child(i) as DockablePanel
-			panel.tabs_visible = value
+			panel.show_tabs = _tabs_visible
+## If [code]true[/code] and a panel only has one tab, it keeps that tab hidden even if
+## [member tabs_visible] is [code]true[/code].
+## Only takes effect is [member tabs_visible] is [code]true[/code].
+@export var hide_single_tab := false:
+	get:
+		return _hide_single_tab
+	set(value):
+		_hide_single_tab = value
+		for i in range(1, _panel_container.get_child_count()):
+			var panel := _panel_container.get_child(i) as DockablePanel
+			panel.hide_single_tab = _hide_single_tab
 @export var rearrange_group := 0
 @export var layout := DockableLayout.new():
 	get:
@@ -49,6 +60,7 @@ var _drag_panel: DockablePanel
 var _tab_align := TabBar.ALIGNMENT_CENTER
 var _tabs_visible := true
 var _use_hidden_tabs_for_min_size := false
+var _hide_single_tab := false
 var _current_panel_index := 0
 var _current_split_index := 0
 var _children_names := {}
@@ -187,17 +199,6 @@ func set_layout(value: DockableLayout) -> void:
 	queue_sort()
 
 
-func set_tab_alignment(value: TabBar.AlignmentMode) -> void:
-	_tab_align = value
-	for i in range(1, _panel_container.get_child_count()):
-		var panel = _panel_container.get_child(i)
-		panel.tab_alignment = value
-
-
-func get_tab_align() -> int:
-	return _tab_align
-
-
 func set_use_hidden_tabs_for_min_size(value: bool) -> void:
 	_use_hidden_tabs_for_min_size = value
 	for i in range(1, _panel_container.get_child_count()):
@@ -396,7 +397,8 @@ func _get_panel(idx: int) -> DockablePanel:
 		return _panel_container.get_child(idx)
 	var panel := DockablePanel.new()
 	panel.tab_alignment = _tab_align
-	panel.tabs_visible = _tabs_visible
+	panel.show_tabs = _tabs_visible
+	panel.hide_single_tab = _hide_single_tab
 	panel.use_hidden_tabs_for_min_size = _use_hidden_tabs_for_min_size
 	panel.set_tabs_rearrange_group(maxi(0, rearrange_group))
 	_panel_container.add_child(panel)

addons/dockable_container/dockable_panel.gd

@@ -8,8 +8,22 @@ var leaf: DockableLayoutPanel:
 		return get_leaf()
 	set(value):
 		set_leaf(value)
+var show_tabs := true:
+	get:
+		return _show_tabs
+	set(value):
+		_show_tabs = value
+		_handle_tab_visibility()
+var hide_single_tab := false:
+	get:
+		return _hide_single_tab
+	set(value):
+		_hide_single_tab = value
+		_handle_tab_visibility()
 
 var _leaf: DockableLayoutPanel
+var _show_tabs := true
+var _hide_single_tab := false
 
 
 func _ready() -> void:
@@ -48,6 +62,7 @@ func track_nodes(nodes: Array[Control], new_leaf: DockableLayoutPanel) -> void:
 		ref_control.reference_to = nodes[i]
 		set_tab_title(i, nodes[i].name)
 	set_leaf(new_leaf)
+	_handle_tab_visibility()
 
 
 func get_child_rect() -> Rect2:
@@ -84,3 +99,10 @@ func _on_tab_changed(tab: int) -> void:
 	var name_index_in_leaf := _leaf.find_name(tab_name)
 	if name_index_in_leaf != tab:  # NOTE: this handles added tabs (index == -1)
 		tab_layout_changed.emit(tab)
+
+
+func _handle_tab_visibility() -> void:
+	if _hide_single_tab and get_tab_count() == 1:
+		tabs_visible = false
+	else:
+		tabs_visible = _show_tabs