def __init__(self, owner: AssociationItem, end: Optional[str] = None):
self._canvas = None
self._owner = owner
self._end = end
# Rendered text for name and multiplicity
self._name = ""
self._mult = ""
self._name_bounds = Rectangle()
self._mult_bounds = Rectangle()
self._name_layout = Layout("")
self._mult_layout = Layout("")
self._inline_style: Style = {"font-size": 10}
def __init__(self, owner, end=None):
super().__init__(id=False) # Transient object
self.canvas = None
self._owner = owner
self._end = end
# Rendered text for name and multiplicity
self._name = ""
self._mult = ""
self._name_bounds = Rectangle()
self._mult_bounds = Rectangle()
self._name_layout = Layout("")
self._mult_layout = Layout("")
self._inline_style: Style = {"font-size": 10}
def test_text_with_font_as_dict_with_values_set_to_none():
w, h = Layout(
"Example",
{
"font-family": "sans",
"font-size": 9.5,
"font-style": None,
"font-weight": FontWeight.BOLD,
"text-decoration": TextDecoration.NONE,
},
).size()
assert w
assert h
def test_text_with_font_as_dict():
w, h = Layout(
"Example",
{
"font-family": "sans",
"font-size": 10,
"font-style": FontStyle.ITALIC,
"font-weight": FontWeight.BOLD,
"text-decoration": TextDecoration.UNDERLINE,
},
).size()
assert w
assert h
def draw_partitions(self, bounding_box: Rectangle,
context: DrawContext) -> None:
"""Draw partition separators and add the name."""
cr = context.cairo
if self.partition:
partition_width = bounding_box.width / len(self.partition)
else:
partition_width = bounding_box.width / 2
layout = Layout()
style = context.style
padding_top = context.style["padding"][0]
for num, partition in enumerate(self.partition):
cr.move_to(partition_width * num, 0)
cr.line_to(partition_width * num, bounding_box.height)
layout.set(text=partition.name, font=style)
cr.move_to(partition_width * num, padding_top * 3)
layout.show_layout(
cr,
partition_width,
default_size=(partition_width, HEADER_HEIGHT),
)
def __init__(self, text=lambda: "", width=lambda: -1, style: Style = {}):
self._text = text if callable(text) else lambda: text
self.width = width if callable(width) else lambda: width
self._inline_style = style
self._layout = Layout()
class AssociationEnd:
"""An association end represents one end of an association. An association
has two ends. An association end has two labels: one for the name and one
for the multiplicity (and maybe one for tagged values in the future).
An AsociationEnd has no ID, hence it will not be stored, but it will
be recreated by the owning Association.
"""
def __init__(self, owner: AssociationItem, end: Optional[str] = None):
self._canvas = None
self._owner = owner
self._end = end
# Rendered text for name and multiplicity
self._name = ""
self._mult = ""
self._name_bounds = Rectangle()
self._mult_bounds = Rectangle()
self._name_layout = Layout("")
self._mult_layout = Layout("")
self._inline_style: Style = {"font-size": 10}
name_bounds = property(lambda s: s._name_bounds)
@property
def owner(self) -> AssociationItem:
"""Override Element.owner."""
return self._owner
@property
def owner_handle(self) -> Handle:
# handle(event) is the event handler method
return self._owner.head if self is self._owner.head_end else self._owner.tail
@property
def subject(self) -> Optional[UML.Property]:
return getattr(self.owner, f"{self._end}_subject") # type:ignore[no-any-return]
def request_update(self):
self._owner.request_update()
def set_text(self):
"""Set the text on the association end."""
if self.subject:
try:
n, m = format_association_end(self.subject)
except ValueError:
# need more than 0 values to unpack: property was rendered as
# attribute while in a UNDO action for example.
pass
else:
self._name = n
self._mult = m
self.request_update()
def get_name(self):
return self._name
def get_mult(self):
return self._mult
def post_update(self, context, p1, p2):
"""Update label placement for association's name and multiplicity
label.
p1 is the line end and p2 is the last but one point of the line.
"""
style = combined_style(context.style, self._inline_style)
ofs = 5
dx = float(p2[0]) - float(p1[0])
dy = float(p2[1]) - float(p1[1])
def max_text_size(size1, size2):
w1, h1 = size1
w2, h2 = size2
return (max(w1, w2), max(h1, h2))
name_layout = self._name_layout
name_layout.set_text(self._name)
name_layout.set_font(style)
name_w, name_h = max_text_size(name_layout.size(), (10, 10))
mult_layout = self._mult_layout
mult_layout.set_text(self._mult)
mult_layout.set_font(style)
mult_w, mult_h = max_text_size(mult_layout.size(), (10, 10))
if dy == 0:
rc = 1000.0 # quite a lot...
else:
rc = dx / dy
abs_rc = abs(rc)
h = dx > 0 # right side of the box
v = dy > 0 # bottom side
if abs_rc > 6:
# horizontal line
if h:
name_dx = ofs
name_dy = -ofs - name_h
mult_dx = ofs
mult_dy = ofs
else:
name_dx = -ofs - name_w
name_dy = -ofs - name_h
mult_dx = -ofs - mult_w
mult_dy = ofs
elif 0 <= abs_rc <= 0.2:
# vertical line
if v:
name_dx = -ofs - name_w
name_dy = ofs
mult_dx = ofs
mult_dy = ofs
else:
name_dx = -ofs - name_w
name_dy = -ofs - name_h
mult_dx = ofs
mult_dy = -ofs - mult_h
else:
# Should both items be placed on the same side of the line?
r = abs_rc < 1.0
# Find out alignment of text (depends on the direction of the line)
align_left = h ^ r
align_bottom = v ^ r
if align_left:
name_dx = ofs
mult_dx = ofs
else:
name_dx = -ofs - name_w
mult_dx = -ofs - mult_w
if align_bottom:
name_dy = -ofs - name_h
mult_dy = -ofs - name_h - mult_h
else:
name_dy = ofs
mult_dy = ofs + mult_h
self._name_bounds = Rectangle(
p1[0] + name_dx, p1[1] + name_dy, width=name_w, height=name_h
)
self._mult_bounds = Rectangle(
p1[0] + mult_dx, p1[1] + mult_dy, width=mult_w, height=mult_h
)
def point(self, x, y):
"""Given a point (x, y) return the distance to the diagram item."""
drp = distance_rectangle_point
pos = (x, y)
d1 = drp(self._name_bounds, pos)
d2 = drp(self._mult_bounds, pos)
d3 = 1000.0
return min(d1, d2, d3)
def draw(self, context):
"""Draw name and multiplicity of the line end."""
if not self.subject:
return
cr = context.cairo
text_color = context.style.get("text-color")
if text_color:
cr.set_source_rgba(*text_color)
cr.move_to(self._name_bounds.x, self._name_bounds.y)
self._name_layout.show_layout(cr)
cr.move_to(self._mult_bounds.x, self._mult_bounds.y)
self._mult_layout.show_layout(cr)
for b in (self._name_bounds, self._mult_bounds):
text_draw_focus_box(context, b.x, b.y, b.width, b.height)
def test_text_with_just_font_as_dict():
w, h = Layout("Example", {"font-family": "sans", "font-size": 10}).size()
assert w
assert h
