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# SPDX-License-Identifier: GPL-2.0-or-later
import bpy
from .common_classes import SnapUtilities
from .common_utilities import snap_utilities
# def mesh_runtime_batchcache_isdirty(me):
# import ctypes
# batch_cache = ctypes.c_void_p.from_address(me.as_pointer() + 1440)
# if batch_cache:
# return ctypes.c_bool.from_address(batch_cache.value + 549).value
# return False
class SnapWidgetCommon(SnapUtilities, bpy.types.Gizmo):
# __slots__ = ('inited', 'mode', 'last_mval')
snap_to_update = False
def handler(self, scene, depsgraph):
cls = SnapWidgetCommon
if cls.snap_to_update is False:
last_operator = self.wm_operators[-1] if self.wm_operators else None
if (not last_operator or
last_operator.name not in {'Select', 'Loop Select', '(De)select All'}):
cls.snap_to_update = depsgraph.id_type_updated('MESH') or \
depsgraph.id_type_updated('OBJECT')
def draw_point_and_elem(self):
if self.bm:
if self.bm.is_valid and self.geom.is_valid:
self.draw_cache.draw_elem(self.snap_obj, self.bm, self.geom)
else:
self.bm = None
self.geom = None
self.draw_cache.draw(self.type, self.location, None, None, None)
def init_delayed(self):
self.inited = False
def init_snapwidget(self, context, snap_edge_and_vert=True):
self.inited = True
self.snap_context_init(context, snap_edge_and_vert)
self.snap_context_update(context)
self.mode = context.mode
self.last_mval = None
self.wm_operators = context.window_manager.operators
bpy.app.handlers.depsgraph_update_post.append(self.handler)
SnapWidgetCommon.snap_to_update = False
SnapUtilities.snapwidgets.append(self)
def end_snapwidget(self):
if self in SnapUtilities.snapwidgets:
SnapUtilities.snapwidgets.remove(self)
#from .snap_context_l import global_snap_context_get
#sctx = global_snap_context_get(None, None, None)
sctx = object.__getattribute__(self, 'sctx')
if sctx and not SnapUtilities.snapwidgets:
sctx.clear_snap_objects()
handler = object.__getattribute__(self, 'handler')
bpy.app.handlers.depsgraph_update_post.remove(handler)
def update_snap(self, context, mval):
if self.last_mval == mval:
return -1
else:
self.last_mval = mval
if (SnapWidgetCommon.snap_to_update):
# Something has changed since the last time.
# Has the mesh been changed?
# In the doubt lets clear the snap context.
self.snap_context_update(context)
SnapWidgetCommon.snap_to_update = False
#print('test_select', mval)
space = context.space_data
self.sctx.update_viewport_context(
context.evaluated_depsgraph_get(), context.region, space, True)
shading = space.shading
snap_face = not ((self.snap_vert or self.snap_edge) and
(shading.show_xray or shading.type == 'WIREFRAME'))
if snap_face != self.snap_face:
self.snap_face = snap_face
self.sctx.set_snap_mode(
self.snap_vert, self.snap_edge, self.snap_face)
snap_utilities.cache.clear()
self.snap_obj, prev_loc, self.location, self.type, self.bm, self.geom, len = snap_utilities(
self.sctx,
None,
mval,
increment=self.incremental
)
class SnapPointWidget(SnapWidgetCommon):
bl_idname = "VIEW3D_GT_snap_point"
__slots__ = ()
def test_select(self, context, mval):
if not self.inited:
self.init_snapwidget(context)
self.update_snap(context, mval)
self.snap_to_grid()
context.area.tag_redraw()
return -1
def draw(self, context):
if self.inited:
self.draw_point_and_elem()
def setup(self):
self.init_delayed()
def context_mode_check(context, widget_group):
tools = context.workspace.tools
mode = context.mode
for tool in tools:
if (tool.widget == widget_group) and (tool.mode == mode):
break
else:
context.window_manager.gizmo_group_type_unlink_delayed(widget_group)
return False
return True
class SnapWidgetGroupCommon(bpy.types.GizmoGroup):
bl_space_type = 'VIEW_3D'
bl_region_type = 'WINDOW'
bl_options = {'3D'}
@classmethod
def poll(cls, context):
return context_mode_check(context, cls.bl_idname)
def init_tool(self, context, gizmo_name):
self._widget = self.gizmos.new(gizmo_name)
def __del__(self):
if hasattr(self, "_widget"):
object.__getattribute__(self._widget, 'end_snapwidget')()
class SnapPointWidgetGroup(SnapWidgetGroupCommon):
bl_idname = "MESH_GGT_snap_point"
bl_label = "Draw Snap Point"
def setup(self, context):
self.init_tool(context, SnapPointWidget.bl_idname)
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