def draw(self, cr: cairo.Context) -> None:
xc = self._xc
yc = self._yc
radius = self._radius
scale_radius = self._scale_radius
fill_color = self._fill_color
if radius == 0.0:
return
matrix = cr.get_matrix()
dx = 1 / matrix.xx
dy = 1 / matrix.yy
if scale_radius:
radius_scale = 1 / (0.5 * (matrix.xx + matrix.yy))
else:
radius_scale = 1.0
cr.arc(xc, yc, radius_scale * radius, 0, 2 * math.pi)
cr.set_source_rgba(*fill_color)
cr.fill()
self._last_drawn_region = circle_region(
xc, yc, radius_scale * radius + max(dx, dy))
self._last_drawn_radius_scale = radius_scale
def draw(self, cr: cairo.Context) -> None:
if self._extents is None:
return
extents = self._extents
stroke_color = self._stroke_color
stroke_width = self._stroke_width
cr.rectangle(extents.x, extents.y, extents.w, extents.h)
dx = 1 / cr.get_matrix().xx
dy = 1 / cr.get_matrix().yy
cr.save()
if self._scale_strokes:
stroke_scale = max(dx, dy)
cr.identity_matrix()
else:
stroke_scale = 1.0
cr.set_line_width(stroke_width)
cr.set_source_rgba(*stroke_color)
cr.stroke()
cr.restore()
self._last_drawn_region = rectangle_stroke_region(
extents, max(stroke_width * stroke_scale, dx, dy))
self._last_drawn_stroke_scale = stroke_scale
def draw(self, cr: cairo.Context) -> None:
polyline = self._polyline
stroke_width = self._stroke_width
stroke_color = self._stroke_color
if polyline is None or len(polyline) == 0:
self._last_drawn_region = None
return
if self._path_cache is not None:
cr.append_path(self._path_cache)
else:
self._show_polyline(cr, polyline)
self._path_cache = cr.copy_path()
extents = Rect2(cr.path_extents())
dx = 1 / cr.get_matrix().xx
dy = 1 / cr.get_matrix().yy
cr.save()
if self._scale_strokes:
stroke_scale = max(dx, dy)
cr.identity_matrix()
else:
stroke_scale = 1.0
cr.set_line_width(stroke_width)
cr.set_source_rgba(*stroke_color)
cr.stroke()
cr.restore()
extents = expand_rect(extents, max(stroke_width * stroke_scale, dx,
dy))
self._last_drawn_region = cairo.Region(
cairo.RectangleInt(
int(math.floor(extents.x)),
int(math.floor(extents.y)),
int(math.ceil(extents.w)),
int(math.ceil(extents.h)),
))
def draw(self, cr: cairo.Context) -> None:
start_angle = self._start_angle
delta_angle = self._delta_angle
clockwise = self._clockwise
arc_radius = self._arc_radius
start_line_radius = self._start_line_radius
end_line_radius = self._end_line_radius
x = self._x
y = self._y
stroke_color = self._stroke_color
stroke_width = self._stroke_width
text_radius = self._text_radius
font_size = self._font_size
text_color = self._text_color
scale_radii = self._scale_radii
scale_text = self._scale_text
scale_strokes = self._scale_strokes
if not (math.isfinite(start_angle) and math.isfinite(delta_angle)):
return
end_angle = start_angle + delta_angle
matrix = cr.get_matrix()
if scale_radii:
radius_scale = 1/(0.5 * (matrix.xx + matrix.yy))
else:
radius_scale = 1.0
self._show_hand(cr, x, y, -start_angle, radius_scale*start_line_radius)
self._show_hand(cr, x, y, -end_angle, radius_scale*end_line_radius)
if clockwise:
cr.arc(x, y, radius_scale*arc_radius, -start_angle, -end_angle)
else:
cr.arc_negative(x, y, radius_scale*arc_radius, -start_angle, -end_angle)
cr.save()
if scale_strokes:
cr.identity_matrix()
cr.set_source_rgba(*stroke_color)
cr.set_line_width(stroke_width)
cr.stroke()
cr.restore()
half_angle = (start_angle + end_angle) / 2
cr.move_to(x, y)
cr.rel_move_to(
radius_scale*text_radius * math.cos(half_angle),
radius_scale*text_radius * -math.sin(half_angle),
)
cr.save()
cr.set_source_rgba(*text_color)
cr.set_font_size(font_size)
if scale_text:
cr.identity_matrix()
text = '{:.1f}°'.format(math.degrees(math.fabs(delta_angle)))
text_extents = cr.text_extents(text)
cr.rel_move_to(-text_extents.x_bearing, -text_extents.y_bearing)
cr.rel_move_to(-text_extents.width/2, -text_extents.height/2)
cr.show_text(text)
cr.fill()
cr.restore()