add kanban

addons/kanban_tasks/expand_button/expand_button.gd

@@ -0,0 +1,38 @@
+@tool
+extends Button
+
+
+signal state_changed(expanded: bool)
+
+@export var expanded: bool = true:
+	set(value):
+		if value != expanded:
+			expanded = value
+			__update_icon()
+			state_changed.emit(expanded)
+
+var __texture_rect := TextureRect.new()
+
+
+func _init() -> void:
+	focus_mode = Control.FOCUS_NONE
+	flat = true
+	var center := CenterContainer.new()
+	center.set_anchors_preset(Control.PRESET_FULL_RECT)
+	add_child(center)
+	center.add_child(__texture_rect)
+	pressed.connect(__on_pressed)
+	__update_icon()
+
+
+func _notification(what) -> void:
+	if what == NOTIFICATION_THEME_CHANGED and not is_part_of_edited_scene():
+		__texture_rect.texture = get_theme_icon(&"Collapse", &"EditorIcons")
+
+
+func __update_icon() -> void:
+	__texture_rect.flip_v = expanded
+
+
+func __on_pressed() -> void:
+	expanded = !expanded