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"""
Copyright 2007, 2008, 2009, 2016 Free Software Foundation, Inc.
This file is part of GNU Radio
GNU Radio Companion is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
GNU Radio Companion is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
"""
from __future__ import absolute_import
from ..Constants import LINE_SELECT_SENSITIVITY
from six.moves import zip
class Drawable(object):
"""
GraphicalElement is the base class for all graphical elements.
It contains an X,Y coordinate, a list of rectangular areas that the element occupies,
and methods to detect selection of those areas.
"""
@classmethod
def make_cls_with_base(cls, super_cls):
name = super_cls.__name__
bases = (super_cls,) + cls.__bases__[1:]
namespace = cls.__dict__.copy()
return type(name, bases, namespace)
def __init__(self):
"""
Make a new list of rectangular areas and lines, and set the coordinate and the rotation.
"""
self.coordinate = (0, 0)
self.rotation = 0
self.highlighted = False
self._bounding_rects = []
self._bounding_points = []
def is_horizontal(self, rotation=None):
"""
Is this element horizontal?
If rotation is None, use this element's rotation.
Args:
rotation: the optional rotation
Returns:
true if rotation is horizontal
"""
rotation = rotation or self.rotation
return rotation in (0, 180)
def is_vertical(self, rotation=None):
"""
Is this element vertical?
If rotation is None, use this element's rotation.
Args:
rotation: the optional rotation
Returns:
true if rotation is vertical
"""
rotation = rotation or self.rotation
return rotation in (90, 270)
def rotate(self, rotation):
"""
Rotate all of the areas by 90 degrees.
Args:
rotation: multiple of 90 degrees
"""
self.rotation = (self.rotation + rotation) % 360
def move(self, delta_coor):
"""
Move the element by adding the delta_coor to the current coordinate.
Args:
delta_coor: (delta_x,delta_y) tuple
"""
x, y = self.coordinate
dx, dy = delta_coor
self.coordinate = (x + dx, y + dy)
def create_labels(self, cr=None):
"""
Create labels (if applicable) and call on all children.
Call this base method before creating labels in the element.
"""
def create_shapes(self):
"""
Create shapes (if applicable) and call on all children.
Call this base method before creating shapes in the element.
"""
def draw(self, cr):
raise NotImplementedError()
def bounds_from_area(self, area):
x1, y1, w, h = area
x2 = x1 + w
y2 = y1 + h
self._bounding_rects = [(x1, y1, x2, y2)]
self._bounding_points = [(x1, y1), (x2, y1), (x1, y2), (x2, y2)]
def bounds_from_line(self, line):
self._bounding_rects = rects = []
self._bounding_points = list(line)
last_point = line[0]
for x2, y2 in line[1:]:
(x1, y1), last_point = last_point, (x2, y2)
if x1 == x2:
x1, x2 = x1 - LINE_SELECT_SENSITIVITY, x2 + LINE_SELECT_SENSITIVITY
if y2 < y1:
y1, y2 = y2, y1
elif y1 == y2:
y1, y2 = y1 - LINE_SELECT_SENSITIVITY, y2 + LINE_SELECT_SENSITIVITY
if x2 < x1:
x1, x2 = x2, x1
rects.append((x1, y1, x2, y2))
def what_is_selected(self, coor, coor_m=None):
"""
One coordinate specified:
Is this element selected at given coordinate?
ie: is the coordinate encompassed by one of the areas or lines?
Both coordinates specified:
Is this element within the rectangular region defined by both coordinates?
ie: do any area corners or line endpoints fall within the region?
Args:
coor: the selection coordinate, tuple x, y
coor_m: an additional selection coordinate.
Returns:
self if one of the areas/lines encompasses coor, else None.
"""
x, y = [a - b for a, b in zip(coor, self.coordinate)]
if not coor_m:
for x1, y1, x2, y2 in self._bounding_rects:
if x1 <= x <= x2 and y1 <= y <= y2:
return self
else:
x_m, y_m = [a - b for a, b in zip(coor_m, self.coordinate)]
if y_m < y:
y, y_m = y_m, y
if x_m < x:
x, x_m = x_m, x
for x1, y1 in self._bounding_points:
if x <= x1 <= x_m and y <= y1 <= y_m:
return self
def get_extents(self):
x_min, y_min = x_max, y_max = self.coordinate
x_min += min(x for x, y in self._bounding_points)
y_min += min(y for x, y in self._bounding_points)
x_max += max(x for x, y in self._bounding_points)
y_max += max(y for x, y in self._bounding_points)
return x_min, y_min, x_max, y_max
def mouse_over(self):
pass
def mouse_out(self):
pass
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