def draw_mask_control_points(self, cr, wd, ht):
# Draw active and inactive control points on the active shape.
if self.__active_shape is None:
return
cr.save()
active_rgb = 1, 1, 1
normal_rgb = 0, 0, 0
delete_rgb = 1, 0, 0
cr.set_line_width(1.0)
void = self.colors_to_mask_void(self.__active_shape)
# Highlight the objects that would be directly or indirectly affected
# if the shape were dragged, and how.
min_size = self.get_radius(wd=wd, ht=ht) * self.min_shape_size
void_rgb = normal_rgb
if self._get_void_size(void) < min_size:
# Shape will be deleted
void_rgb = delete_rgb
elif ((self.__active_ctrlpoint is None)
and (self.__tmp_new_ctrlpoint is None)):
# The entire shape would be moved
void_rgb = active_rgb
# Outline the current shape
cr.set_source_rgb(*void_rgb)
for p_idx, p in enumerate(void):
if p_idx == 0:
cr.move_to(*p)
else:
cr.line_to(*p)
cr.close_path()
cr.stroke()
# Control points
colors = self.__active_shape
for col_idx, col in enumerate(colors):
px, py = self.get_pos_for_color(col)
if (px, py) not in void:
# not in convex hull (is it worth doing this fragile test?)
continue
point_rgb = void_rgb
if col_idx == self.__active_ctrlpoint:
point_rgb = active_rgb
cr.set_source_rgb(*point_rgb)
cr.arc(px, py, self.__ctrlpoint_radius, 0, 2 * math.pi)
cr.fill()
if self.__tmp_new_ctrlpoint:
px, py = self.get_pos_for_color(self.__tmp_new_ctrlpoint)
cr.set_source_rgb(*active_rgb)
cr.arc(px, py, self.__ctrlpoint_radius, 0, 2 * math.pi)
cr.fill()
# Centroid
cr.set_source_rgb(*void_rgb)
cx, cy = geom.poly_centroid(void)
cr.save()
cr.set_line_cap(cairo.LINE_CAP_SQUARE)
cr.set_line_width(0.5)
cr.translate(int(cx) + 0.5, int(cy) + 0.5)
cr.move_to(-2, 0)
cr.line_to(2, 0)
cr.stroke()
cr.move_to(0, -2)
cr.line_to(0, 2)
cr.stroke()
cr.restore()
def draw_mask_control_points(self, cr, wd, ht):
# Draw active and inactive control points on the active shape.
if self.__active_shape is None:
return
cr.save()
active_rgb = 1, 1, 1
normal_rgb = 0, 0, 0
delete_rgb = 1, 0, 0
cr.set_line_width(1.0)
void = self.colors_to_mask_void(self.__active_shape)
# Highlight the objects that would be directly or indirectly affected
# if the shape were dragged, and how.
min_size = self.get_radius(wd=wd, ht=ht) * self.min_shape_size
void_rgb = normal_rgb
if self._get_void_size(void) < min_size:
# Shape will be deleted
void_rgb = delete_rgb
elif ((self.__active_ctrlpoint is None) and
(self.__tmp_new_ctrlpoint is None)):
# The entire shape would be moved
void_rgb = active_rgb
# Outline the current shape
cr.set_source_rgb(*void_rgb)
for p_idx, p in enumerate(void):
if p_idx == 0:
cr.move_to(*p)
else:
cr.line_to(*p)
cr.close_path()
cr.stroke()
# Control points
colors = self.__active_shape
for col_idx, col in enumerate(colors):
px, py = self.get_pos_for_color(col)
if (px, py) not in void:
# not in convex hull (is it worth doing this fragile test?)
continue
point_rgb = void_rgb
if col_idx == self.__active_ctrlpoint:
point_rgb = active_rgb
cr.set_source_rgb(*point_rgb)
cr.arc(px, py, self.__ctrlpoint_radius, 0, 2*math.pi)
cr.fill()
if self.__tmp_new_ctrlpoint:
px, py = self.get_pos_for_color(self.__tmp_new_ctrlpoint)
cr.set_source_rgb(*active_rgb)
cr.arc(px, py, self.__ctrlpoint_radius, 0, 2*math.pi)
cr.fill()
# Centroid
cr.set_source_rgb(*void_rgb)
cx, cy = geom.poly_centroid(void)
cr.save()
cr.set_line_cap(cairo.LINE_CAP_SQUARE)
cr.set_line_width(0.5)
cr.translate(int(cx)+0.5, int(cy)+0.5)
cr.move_to(-2, 0)
cr.line_to(2, 0)
cr.stroke()
cr.move_to(0, -2)
cr.line_to(0, 2)
cr.stroke()
cr.restore()