def is_verify(self, state: bool) -> None:
""" Verification is required on input of this attribute.
(CAD application feature)
"""
self.dxf.flags = set_flag_state(self.dxf.flags, const.ATTRIB_VERIFY,
state)
def set_flag_state(self, flag: int, state: bool = True, name: str = 'flags') -> None:
"""
Set binary coded `flag` of DXF attribute `name` to ``1`` (on) if `state` is ``True``, set `flag` to ``0`` (off)
if `state` is ``False``.
"""
flags = self.dxf.get(name, 0)
self.dxf.set(name, set_flag_state(flags, flag, state=state))
def load_xdata_into_dxf_namespace(self) -> None:
try:
tags = [v for c, v in self.xdata.get_xlist('ACAD', 'MVIEW')]
except DXFValueError:
return
tags = tags[3:-2]
dxf = self.dxf
flags = 0
flags = set_flag_state(flags, const.VSF_FAST_ZOOM, bool(tags[11]))
flags = set_flag_state(flags, const.VSF_SNAP_MODE, bool(tags[13]))
flags = set_flag_state(flags, const.VSF_GRID_MODE, bool(tags[14]))
flags = set_flag_state(flags, const.VSF_ISOMETRIC_SNAP_STYLE,
bool(tags[15]))
flags = set_flag_state(flags, const.VSF_HIDE_PLOT_MODE, bool(tags[24]))
try:
dxf.view_target_point = tags[0]
dxf.view_direction_vector = tags[1]
dxf.view_twist_angle = tags[2]
dxf.view_height = tags[3]
dxf.view_center_point = tags[4], tags[5]
dxf.perspective_lens_length = tags[6]
dxf.front_clip_plane_z_value = tags[7]
dxf.back_clip_plane_z_value = tags[8]
dxf.render_mode = tags[9] # view_mode == render_mode ?
dxf.circle_zoom = tags[10]
# fast zoom flag : tag[11]
dxf.ucs_icon = tags[12]
# snap mode flag = tags[13]
# grid mode flag = tags[14]
# isometric snap style = tags[15]
# dxf.snap_isopair = tags[16] ???
dxf.snap_angle = tags[17]
dxf.snap_base_point = tags[18], tags[19]
dxf.snap_spacing = tags[20], tags[21]
dxf.grid_spacing = tags[22], tags[23]
# hide plot flag = tags[24]
except IndexError: # internal exception
raise DXFStructureError("Invalid viewport entity - missing data")
dxf.flags = flags
self._frozen_layers = tags[26:]
self._frozen_layers_content_type = 'names'
self.xdata.discard('ACAD')
def is_preset(self, state: bool) -> None:
""" No prompt during insertion. (CAD application feature) """
self.dxf.flags = set_flag_state(self.dxf.flags, const.ATTRIB_IS_PRESET,
state)
def is_invisible(self, state: bool) -> None:
""" Attribute is invisible (does not appear). """
self.dxf.flags = set_flag_state(self.dxf.flags, const.ATTRIB_INVISIBLE,
state)
def is_const(self, state: bool) -> None:
""" This is a constant attribute. """
self.dxf.flags = set_flag_state(self.dxf.flags, const.ATTRIB_CONST,
state)
def test_set_flag_state():
assert set_flag_state(0, 1, True) == 1
assert set_flag_state(0b10, 1, True) == 0b11
assert set_flag_state(0b111, 0b010, False) == 0b101
assert set_flag_state(0b010, 0b111, True) == 0b111
assert set_flag_state(0b1111, 0b1001, False) == 0b0110
def set_flag_state(self,
flag: int,
state: bool = True,
name: str = 'flags') -> None:
flags = self.get_dxf_attrib(name, 0)
self.set_dxf_attrib(name, set_flag_state(flags, flag, state=state))
def set_flag_state(self, flag, state=True, name='flags'):
flags = self.get_dxf_attrib(name, 0)
self.set_dxf_attrib(name, set_flag_state(flags, flag, state=state))
