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Add snapping to node grab offset #1338

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Add snapping to node grab offset #1338

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22 changes: 18 additions & 4 deletions material_maker/panels/graph_edit/graph_edit.gd
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ var need_save_crash_recovery : bool = false
var top_generator = null
var generator = null

var grab_accumulation : Dictionary[String, Vector2]
@onready var grab_icon := preload("res://material_maker/icons/grab.svg")
var has_grab : bool = false:
set(v):
Expand All @@ -34,6 +35,7 @@ var has_grab : bool = false:
grab_icon.get_size() * 0.5)
else:
Input.set_custom_mouse_cursor(null)
grab_accumulation.clear()

const PREVIEW_COUNT = 2
var current_preview : Array = [ null, null ]
Expand Down Expand Up @@ -134,16 +136,29 @@ func process_port_click(pressed : bool):
port_click_port_index = -1
return


func _input(event: InputEvent) -> void:
# Handle node grab
if has_grab:
var selected_nodes := get_selected_nodes()
if event is InputEventMouseMotion:
for node in selected_nodes:
for node : GraphElement in selected_nodes:
if node is not MMGraphComment:
node.move_to_front()
node.position_offset += event.relative / zoom

if snapping_enabled != event.is_command_or_control_pressed():
if not grab_accumulation.has(node.name):
grab_accumulation[node.name] = Vector2.ZERO
grab_accumulation[node.name] += event.relative / zoom

var step : Vector2 = (grab_accumulation[node.name] / snapping_distance
+ Vector2(0.5, 0.5)).floor()
if not step.is_zero_approx():
node.position_offset = node.position_offset.snappedf(snapping_distance)
node.position_offset += step * snapping_distance
grab_accumulation[node.name] -= step * snapping_distance
else:
node.position_offset += event.relative / zoom

elif (event is InputEventMouseButton
and event.button_index == MOUSE_BUTTON_LEFT):
accept_event()
Expand All @@ -156,7 +171,6 @@ func _input(event: InputEvent) -> void:
if get_nodes_under_mouse().is_empty():
node.set_deferred("selected", true)


func _gui_input(event) -> void:
if (
event.is_action_pressed("ui_library_popup")
Expand Down