Basic Drag&Drop

extends KinematicBody2D

var Mouse_In = false
var Mpos = get_global_mouse_pos()
var Objectdrag = false
# Mouse_In acts as a check switch for if the mouse has entered the object's hitbox
# Mpos is a simple var to keep check on mouse position, is updated in process
# Objectdrag is an extra var to keep the mouse from dropping the Object if it is still dragging but escapes the objects hitbox

func _ready():
    set_fixed_process(true)

func _fixed_process(delta):
    Mpos = get_global_mouse_pos()
#Updates the Mpos on Current pos
    if Mouse_In == true:
        if Input.is_mouse_button_pressed(BUTTON_LEFT):
            set_global_pos(Mpos)
            Objectdrag = true
        else:
            Objectdrag = false

func _on_KinematicBody2D_mouse_enter():
    Mouse_In = true

func _on_KinematicBody2D_mouse_exit():
    if Objectdrag == false:
        Mouse_In = false