Select Git revision
Code owners
Assign users and groups as approvers for specific file changes. Learn more.
shape.py 6.07 KiB
#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2011 Michael Pitidis, Hussein Abdulwahid.
#
# This file is part of Labelme.
#
# Labelme 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 3 of the License, or
# (at your option) any later version.
#
# Labelme 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 Labelme. If not, see <http://www.gnu.org/licenses/>.
#
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from lib import distance
# TODO:
# - [opt] Store paths instead of creating new ones at each paint.
DEFAULT_LINE_COLOR = QColor(0, 255, 0, 128)
DEFAULT_FILL_COLOR = QColor(255, 0, 0, 128)
DEFAULT_SELECT_LINE_COLOR = QColor(255, 255, 255)
DEFAULT_SELECT_FILL_COLOR = QColor(0, 128, 255, 155)
DEFAULT_VERTEX_FILL_COLOR = QColor(0, 255, 0, 255)
DEFAULT_HVERTEX_FILL_COLOR = QColor(255, 0, 0)
class Shape(object):
P_SQUARE, P_ROUND = range(2)
MOVE_VERTEX, NEAR_VERTEX = range(2)
## The following class variables influence the drawing
## of _all_ shape objects.
line_color = DEFAULT_LINE_COLOR
fill_color = DEFAULT_FILL_COLOR
select_line_color = DEFAULT_SELECT_LINE_COLOR
select_fill_color = DEFAULT_SELECT_FILL_COLOR
vertex_fill_color = DEFAULT_VERTEX_FILL_COLOR
hvertex_fill_color = DEFAULT_HVERTEX_FILL_COLOR
point_type = P_ROUND
point_size = 8
scale = 1.0
def __init__(self, label=None, line_color=None):
self.label = label
self.points = []
self.fill = False
self.selected = False
self._highlightIndex = None
self._highlightMode = self.NEAR_VERTEX
self._highlightSettings = {
self.NEAR_VERTEX: (4, self.P_ROUND),
self.MOVE_VERTEX: (1.5, self.P_SQUARE),
}
self._closed = False
if line_color is not None:
# Override the class line_color attribute
# with an object attribute. Currently this
# is used for drawing the pending line a different color.
self.line_color = line_color
def close(self):
assert len(self.points) > 2
self._closed = True
def addPoint(self, point):
if self.points and point == self.points[0]:
self.close()
else:
self.points.append(point)
def popPoint(self):
if self.points:
return self.points.pop()
return None
def isClosed(self):
return self._closed
def setOpen(self):
self._closed = False
def paint(self, painter):
if self.points:
color = self.select_line_color if self.selected else self.line_color
pen = QPen(color)
# Try using integer sizes for smoother drawing(?)
pen.setWidth(max(1, int(round(2.0 / self.scale))))
painter.setPen(pen)
line_path = QPainterPath()
vrtx_path = QPainterPath()
line_path.moveTo(self.points[0])
# Uncommenting the following line will draw 2 paths
# for the 1st vertex, and make it non-filled, which
# may be desirable.
#self.drawVertex(vrtx_path, 0)
for i, p in enumerate(self.points):
line_path.lineTo(p)
self.drawVertex(vrtx_path, i)
if self.isClosed():
line_path.lineTo(self.points[0])
painter.drawPath(line_path)
painter.drawPath(vrtx_path)
painter.fillPath(vrtx_path, self.vertex_fill_color)
if self.fill:
color = self.select_fill_color if self.selected else self.fill_color
painter.fillPath(line_path, color)
def drawVertex(self, path, i):
d = self.point_size / self.scale
shape = self.point_type
point = self.points[i]
if i == self._highlightIndex:
size, shape = self._highlightSettings[self._highlightMode]
d *= size
if self._highlightIndex is not None:
self.vertex_fill_color = self.hvertex_fill_color
else:
self.vertex_fill_color = Shape.vertex_fill_color
if shape == self.P_SQUARE:
path.addRect(point.x() - d/2, point.y() - d/2, d, d)
elif shape == self.P_ROUND:
path.addEllipse(point, d/2.0, d/2.0)
else:
assert False, "unsupported vertex shape"
def nearestVertex(self, point, epsilon):
for i, p in enumerate(self.points):
if distance(p - point) <= epsilon:
return i
return None
def containsPoint(self, point):
return self.makePath().contains(point)
def makePath(self):
path = QPainterPath(self.points[0])
for p in self.points[1:]:
path.lineTo(p)
return path
def boundingRect(self):
return self.makePath().boundingRect()
def moveBy(self, offset):
self.points = [p + offset for p in self.points]
def moveVertexBy(self, i, offset):
self.points[i] = self.points[i] + offset
def highlightVertex(self, i, action):
self._highlightIndex = i
self._highlightMode = action
def highlightClear(self):
self._highlightIndex = None
def copy(self):
shape = Shape("Copy of %s" % self.label )
shape.points= [p for p in self.points]
shape.fill = self.fill
shape.selected = self.selected
shape._closed = self._closed
if self.line_color != Shape.line_color:
shape.line_color = self.line_color
if self.fill_color != Shape.fill_color:
shape.fill_color = self.fill_color
return shape
def __len__(self):
return len(self.points)
def __getitem__(self, key):
return self.points[key]
def __setitem__(self, key, value):
self.points[key] = value