def __updatePen(self):
self.prepareGeometryChange()
self.__boundingRect = None
if self.__dynamic:
if self.__dynamicEnabled:
color = QColor(0, 150, 0, 150)
else:
color = QColor(150, 0, 0, 150)
normal = QPen(QBrush(color), 2.0)
hover = QPen(QBrush(color.darker(120)), 2.1)
else:
normal = QPen(QBrush(QColor("#9CACB4")), 2.0)
hover = QPen(QBrush(QColor("#7D7D7D")), 2.1)
if self.__state & LinkItem.Empty:
pen_style = Qt.DashLine
else:
pen_style = Qt.SolidLine
normal.setStyle(pen_style)
hover.setStyle(pen_style)
if self.hover:
pen = hover
else:
pen = normal
self.curveItem.setPen(pen)
def __updatePen(self):
self.prepareGeometryChange()
self.__boundingRect = None
if self.__dynamic:
if self.__dynamicEnabled:
color = QColor(0, 150, 0, 150)
else:
color = QColor(150, 0, 0, 150)
normal = QPen(QBrush(color), 2.0)
hover = QPen(QBrush(color.darker(120)), 2.1)
else:
normal = QPen(QBrush(QColor("#9CACB4")), 2.0)
hover = QPen(QBrush(QColor("#7D7D7D")), 2.1)
if self.__state & LinkItem.Empty:
pen_style = Qt.DashLine
else:
pen_style = Qt.SolidLine
normal.setStyle(pen_style)
hover.setStyle(pen_style)
if self.hover:
pen = hover
else:
pen = normal
self.curveItem.setPen(pen)
def shape(self):
if self.__shape is None:
path = self.curvePath()
pen = QPen(self.pen())
pen.setWidthF(max(pen.widthF(), 7.0))
pen.setStyle(Qt.SolidLine)
self.__shape = stroke_path(path, pen)
return self.__shape
def shape(self):
if self.__shape is None:
path = self.curvePath()
pen = QPen(self.pen())
pen.setWidthF(max(pen.widthF(), 7.0))
pen.setStyle(Qt.SolidLine)
self.__shape = stroke_path(path, pen)
return self.__shape
def make_pen(brush=Qt.black, width=1, style=Qt.SolidLine,
cap_style=Qt.SquareCap, join_style=Qt.BevelJoin,
cosmetic=False):
pen = QPen(brush)
pen.setWidth(width)
pen.setStyle(style)
pen.setCapStyle(cap_style)
pen.setJoinStyle(join_style)
pen.setCosmetic(cosmetic)
return pen
def __init__(self, parent):
super().__init__(parent)
self.__range = None # type: Tuple[float]
self.__value_range = None # type: Tuple[float]
self.__model_output = None # type: float
self.__base_value = None # type: float
self.__group = QGraphicsItemGroup(self)
low_color, high_color = QColor(*RGB_LOW), QColor(*RGB_HIGH)
self.__low_item = QGraphicsRectItem()
self.__low_item.setPen(QPen(low_color))
self.__low_item.setBrush(QBrush(low_color))
self.__high_item = QGraphicsRectItem()
self.__high_item.setPen(QPen(high_color))
self.__high_item.setBrush(QBrush(high_color))
self.__low_cover_item = LowCoverItem()
self.__high_cover_item = HighCoverItem()
pen = QPen(IndicatorItem.COLOR)
pen.setStyle(Qt.DashLine)
pen.setWidth(1)
self.__model_output_line = QGraphicsLineItem()
self.__model_output_line.setPen(pen)
self.__base_value_line = QGraphicsLineItem()
self.__base_value_line.setPen(pen)
self.__model_output_ind = IndicatorItem("Model prediction: {}")
self.__base_value_ind = IndicatorItem("Base value: {}\nThe average "
"prediction for selected class.")
self.__group.addToGroup(self.__low_item)
self.__group.addToGroup(self.__high_item)
self.__group.addToGroup(self.__low_cover_item)
self.__group.addToGroup(self.__high_cover_item)
self.__group.addToGroup(self.__model_output_line)
self.__group.addToGroup(self.__base_value_line)
self.__group.addToGroup(self.__model_output_ind)
self.__group.addToGroup(self.__base_value_ind)
self.__low_parts = [] # type: List[LowPartItem]
self.__high_parts = [] # type: List[HighPartItem]
def update_pen(pen,
brush=None,
width=None,
style=None,
cap_style=None,
join_style=None,
cosmetic=None):
pen = QPen(pen)
if brush is not None:
pen.setBrush(QBrush(brush))
if width is not None:
pen.setWidth(width)
if style is not None:
pen.setStyle(style)
if cap_style is not None:
pen.setCapStyle(cap_style)
if join_style is not None:
pen.setJoinStyle(join_style)
if cosmetic is not None:
pen.setCosmetic(cosmetic)
return pen
class GraphAttributes:
"""
Creates entire graph of explanations, paint function is the main one, it delegates painting of attributes to draw_attribute,
header and scale are dealt with in draw_header_footer. Header is fixed in size.
Parameters
----------
scene: QGraphicsScene
scene to add elements to
num_of_atr : int
number of attributes to plot
space: int
space between columns with atr names, values
offset_y : int
distance between the line border of attribute box plot and the box itself
rect_height : int
height of a rectangle, representing score of the attribute
"""
def __init__(self,
scene,
num_of_atr=3,
space=35,
offset_y=10,
rect_height=40):
self.scene = scene
self.num_of_atr = num_of_atr
self.space = space
self.graph_space = 80
self.offset_y = offset_y
self.black_pen = QPen(Qt.black, 2)
self.gray_pen = QPen(Qt.gray, 1)
self.light_gray_pen = QPen(QColor("#DFDFDF"), 1)
self.light_gray_pen.setStyle(Qt.DashLine)
self.brush = QBrush(QColor(0x33, 0x88, 0xff, 0xc0))
self.blue_pen = QPen(QBrush(QColor(0x33, 0x00, 0xff)), 2)
"""placeholders"""
self.rect_height = rect_height
self.max_contrib = None
self.atr_area_h = None
self.atr_area_w = None
self.scale = None
def get_needed_offset(self, explanations):
max_n = 0
word = ""
max_v = 0
val = ""
for e in explanations:
if max_n < len(str(e._metas[0])):
word = str(e._metas[0])
max_n = len(str(e._metas[0]))
if max_v < len(str(e._metas[1])):
val = str(e._metas[1])
max_v = len(str(e._metas[1]))
w = QGraphicsSimpleTextItem(word, None)
v = QGraphicsSimpleTextItem(val, None)
return w.boundingRect().width(), v.boundingRect().width()
def paint(self, wp, explanations=None, header_h=100):
"""
Coordinates drawing
Parameters
----------
wp : QWidget
current viewport
explanations : Orange.data.table
data table with name, value, score and error of attributes to plot
header_h : int
space to be left on the top and the bottom of graph for header and scale
"""
self.name_w, self.val_w = self.get_needed_offset(explanations)
self.offset_left = self.space + self.name_w + \
self.space + self.val_w + self.graph_space
self.offset_right = self.graph_space + 50
self.atr_area_h = wp.height() / 2 - header_h
self.atr_area_w = (wp.width() - self.offset_left -
self.offset_right) / 2
coords = self.split_boxes_area(self.atr_area_h, self.num_of_atr,
header_h)
self.max_contrib = np.max(
abs(explanations.X[:, 0]) + explanations.X[:, 1])
self.unit = self.get_scale()
unit_pixels = np.floor(self.atr_area_w /
(self.max_contrib / self.unit))
self.scale = unit_pixels / self.unit
self.draw_header_footer(wp, header_h, unit_pixels,
coords[self.num_of_atr - 1], coords[0])
for y, e in zip(coords, explanations[:self.num_of_atr]):
self.draw_attribute(y,
atr_name=str(e._metas[0]),
atr_val=str(e._metas[1]),
atr_contrib=e._x[0],
error=e._x[1])
def draw_header_footer(self,
wp,
header_h,
unit_pixels,
last_y,
first_y,
marking_len=15):
"""header"""
max_x = self.max_contrib * self.scale
atr_label = QGraphicsSimpleTextItem("Name", None)
val_label = QGraphicsSimpleTextItem("Value", None)
score_label = QGraphicsSimpleTextItem("Score", None)
font = score_label.font()
font.setBold(True)
font.setPointSize(13)
atr_label.setFont(font)
val_label.setFont(font)
score_label.setFont(font)
white_pen = QPen(Qt.white, 3)
fix = self.offset_left + self.atr_area_w
self.place_left(val_label, -self.atr_area_h - header_h * 0.85)
self.place_left_edge(atr_label, -self.atr_area_h - header_h * 0.85)
self.place_right(score_label, -self.atr_area_h - header_h * 0.85)
self.scene.addLine(-max_x + fix, -self.atr_area_h - header_h,
max_x + fix, -self.atr_area_h - header_h, white_pen)
"""footer"""
line_y = max(first_y + wp.height() + header_h / 2 - 10,
last_y + header_h / 2 + self.rect_height)
self.scene.addLine(-max_x + fix, line_y, max_x + fix, line_y,
self.black_pen)
previous = 0
recomended_d = 35
for i in range(0, int(self.max_contrib / self.unit) + 1):
x = unit_pixels * i
"""grid lines"""
self.scene.addLine(x + fix, first_y, x + fix, line_y,
self.light_gray_pen)
self.scene.addLine(-x + fix, first_y, -x + fix, line_y,
self.light_gray_pen)
self.scene.addLine(x + fix, line_y, x + fix, line_y + marking_len,
self.black_pen)
self.scene.addLine(-x + fix, line_y, -x + fix,
line_y + marking_len, self.black_pen)
"""markings on the ruler"""
if x + fix - previous > recomended_d:
self.place_centered(self.format_marking(i * self.unit),
x + fix, line_y + marking_len + 5)
if x > 0:
self.place_centered(self.format_marking(-i * self.unit),
-x + fix, line_y + marking_len + 5)
previous = x + fix
def format_marking(self, x, places=2):
return QGraphicsSimpleTextItem(str(round(x, places)), None)
def get_scale(self):
"""figures out on what scale is max score (1, .1, .01)
TESTING NEEDED, maybe something more elegant.
"""
if self.max_contrib > 10:
return 10
elif self.max_contrib > 1:
return 1
elif self.max_contrib > 0.1:
return 0.1
else:
return 0.01
def draw_attribute(self, y, atr_name, atr_val, atr_contrib, error):
fix = (self.offset_left + self.atr_area_w)
"""vertical line where x = 0"""
self.scene.addLine(0 + fix, y, 0 + fix, y + self.rect_height,
self.black_pen)
"""borders"""
self.scene.addLine(self.offset_left, y, fix + self.atr_area_w, y,
self.gray_pen)
self.scene.addLine(self.offset_left, y + self.rect_height,
fix + self.atr_area_w, y + self.rect_height,
self.gray_pen)
if atr_name is not None and atr_val is not None and atr_contrib is not None:
atr_contrib_x = atr_contrib * self.scale + fix
error_x = error * self.scale
padded_rect = self.rect_height - 2 * self.offset_y
len_rec = 2 * error_x
graphed_rect = QGraphicsRectItem(atr_contrib_x - error_x,
y + self.offset_y, len_rec,
padded_rect)
graphed_rect.setBrush(self.brush)
graphed_rect.setPen(QPen(Qt.NoPen))
self.scene.addItem(graphed_rect)
"""vertical line marks calculated contribution of attribute"""
self.atr_line = self.scene.addLine(
atr_contrib_x, y + self.offset_y + 2, atr_contrib_x,
y + self.rect_height - self.offset_y - 2, self.blue_pen)
"""atr name and value on the left"""
self.place_left(QGraphicsSimpleTextItem(atr_val, None),
y + self.rect_height / 2)
self.place_left_edge(QGraphicsSimpleTextItem(atr_name, None),
y + self.rect_height / 2)
"""atr score on the right"""
self.place_right(self.format_marking(atr_contrib),
y + self.rect_height / 2)
def place_left(self, text, y):
"""places text to the left"""
self.place_centered(text,
2 * self.space + self.name_w + self.val_w / 2, y)
def place_left_edge(self, text, y):
"""places text more left than place_left"""
self.scene.addLine(0, y, 0 - 10, y + 2, QPen(Qt.white, 0))
self.place_centered(text, self.space + self.name_w / 2, y)
def place_right(self, text, y):
x = self.offset_left + 2 * self.atr_area_w + self.graph_space + 15
self.scene.addLine(x, y, x, y + 2, QPen(Qt.white, 0))
self.place_centered(
text, self.offset_left + 2 * self.atr_area_w + self.graph_space, y)
def place_centered(self, text, x, y):
"""centers the text around given coordinates"""
to_center = text.boundingRect().width() / 2
text.setPos(x - to_center, y)
self.scene.addItem(text)
def split_boxes_area(self, h, num_boxes, header_h):
"""calculates y coordinates of boxes to be plotted, calculates rect_height
Parameters
---------
h : int
height of area
num_boxes : int
number of boxes to fill our area
header_h : int
height of header
Returns:
list y_coordinates
"""
return [(-h + i * self.rect_height) for i in range(num_boxes)]
class GraphAttributes:
"""
Creates entire graph of explanations, paint function is the main one, it delegates painting of attributes to draw_attribute,
header and scale are dealt with in draw_header_footer. Header is fixed in size.
Parameters
----------
scene: QGraphicsScene
scene to add elements to
num_of_atr : int
number of attributes to plot
space: int
space between columns with atr names, values
offset_y : int
distance between the line border of attribute box plot and the box itself
rect_height : int
height of a rectangle, representing score of the attribute
"""
def __init__(self, scene, num_of_atr=3, space=35, offset_y=10, rect_height=40):
self.scene = scene
self.num_of_atr = num_of_atr
self.space = space
self.graph_space = 80
self.offset_y = offset_y
self.black_pen = QPen(Qt.black, 2)
self.gray_pen = QPen(Qt.gray, 1)
self.light_gray_pen = QPen(QColor("#DFDFDF"), 1)
self.light_gray_pen.setStyle(Qt.DashLine)
self.brush = QBrush(QColor(0x33, 0x88, 0xff, 0xc0))
self.blue_pen = QPen(QBrush(QColor(0x33, 0x00, 0xff)), 2)
"""placeholders"""
self.rect_height = rect_height
self.max_contrib = None
self.atr_area_h = None
self.atr_area_w = None
self.scale = None
def get_needed_offset(self, explanations):
max_n = 0
word = ""
max_v = 0
val = ""
for e in explanations:
if max_n < len(str(e._metas[0])):
word = str(e._metas[0])
max_n = len(str(e._metas[0]))
if max_v < len(str(e._metas[1])):
val = str(e._metas[1])
max_v = len(str(e._metas[1]))
w = QGraphicsSimpleTextItem(word, None)
v = QGraphicsSimpleTextItem(val, None)
return w.boundingRect().width(), v.boundingRect().width()
def paint(self, wp, explanations=None, header_h=100):
"""
Coordinates drawing
Parameters
----------
wp : QWidget
current viewport
explanations : Orange.data.table
data table with name, value, score and error of attributes to plot
header_h : int
space to be left on the top and the bottom of graph for header and scale
"""
self.name_w, self.val_w = self.get_needed_offset(explanations)
self.offset_left = self.space + self.name_w + \
self.space + self.val_w + self.graph_space
self.offset_right = self.graph_space + 50
self.atr_area_h = wp.height()/2 - header_h
self.atr_area_w = (wp.width() - self.offset_left -
self.offset_right) / 2
coords = self.split_boxes_area(
self.atr_area_h, self.num_of_atr, header_h)
self.max_contrib = np.max(
abs(explanations.X[:, 0]) + explanations.X[:, 1])
self.unit = self.get_scale()
unit_pixels = np.floor(self.atr_area_w/(self.max_contrib/self.unit))
self.scale = unit_pixels / self.unit
self.draw_header_footer(
wp, header_h, unit_pixels, coords[self.num_of_atr - 1], coords[0])
for y, e in zip(coords, explanations[:self.num_of_atr]):
self.draw_attribute(y, atr_name=str(e._metas[0]), atr_val=str(
e._metas[1]), atr_contrib=e._x[0], error=e._x[1])
def draw_header_footer(self, wp, header_h, unit_pixels, last_y, first_y, marking_len=15):
"""header"""
max_x = self.max_contrib * self.scale
atr_label = QGraphicsSimpleTextItem("Name", None)
val_label = QGraphicsSimpleTextItem("Value", None)
score_label = QGraphicsSimpleTextItem("Score", None)
font = score_label.font()
font.setBold(True)
font.setPointSize(13)
atr_label.setFont(font)
val_label.setFont(font)
score_label.setFont(font)
white_pen = QPen(Qt.white, 3)
fix = self.offset_left + self.atr_area_w
self.place_left(val_label, -self.atr_area_h - header_h*0.85)
self.place_left_edge(atr_label, -self.atr_area_h - header_h*0.85)
self.place_right(score_label, -self.atr_area_h - header_h*0.85)
self.scene.addLine(-max_x + fix, -self.atr_area_h - header_h,
max_x + fix, -self.atr_area_h - header_h, white_pen)
"""footer"""
line_y = max(first_y + wp.height() + header_h/2 - 10,
last_y + header_h/2 + self.rect_height)
self.scene.addLine(-max_x + fix, line_y, max_x +
fix, line_y, self.black_pen)
previous = 0
recomended_d = 35
for i in range(0, int(self.max_contrib / self.unit) + 1):
x = unit_pixels * i
"""grid lines"""
self.scene.addLine(x + fix, first_y, x + fix,
line_y, self.light_gray_pen)
self.scene.addLine(-x + fix, first_y, -x + fix,
line_y, self.light_gray_pen)
self.scene.addLine(x + fix, line_y, x + fix, line_y +
marking_len, self.black_pen)
self.scene.addLine(-x + fix, line_y, -x + fix, line_y +
marking_len, self.black_pen)
"""markings on the ruler"""
if x + fix - previous > recomended_d:
self.place_centered(self.format_marking(
i*self.unit), x + fix, line_y + marking_len + 5)
if x > 0:
self.place_centered(
self.format_marking(-i*self.unit), -x + fix, line_y + marking_len + 5)
previous = x + fix
def format_marking(self, x, places=2):
return QGraphicsSimpleTextItem(str(round(x, places)), None)
def get_scale(self):
"""figures out on what scale is max score (1, .1, .01)
TESTING NEEDED, maybe something more elegant.
"""
if self.max_contrib > 10:
return 10
elif self.max_contrib > 1:
return 1
elif self.max_contrib > 0.1:
return 0.1
else:
return 0.01
def draw_attribute(self, y, atr_name, atr_val, atr_contrib, error):
fix = (self.offset_left + self.atr_area_w)
"""vertical line where x = 0"""
self.scene.addLine(0 + fix, y, 0 + fix, y +
self.rect_height, self.black_pen)
"""borders"""
self.scene.addLine(self.offset_left,
y, fix + self.atr_area_w, y, self.gray_pen)
self.scene.addLine(self.offset_left, y + self.rect_height,
fix + self.atr_area_w, y + self.rect_height, self.gray_pen)
if atr_name is not None and atr_val is not None and atr_contrib is not None:
atr_contrib_x = atr_contrib * self.scale + fix
error_x = error * self.scale
padded_rect = self.rect_height - 2 * self.offset_y
len_rec = 2 * error_x
graphed_rect = QGraphicsRectItem(
atr_contrib_x - error_x, y + self.offset_y, len_rec, padded_rect)
graphed_rect.setBrush(self.brush)
graphed_rect.setPen(QPen(Qt.NoPen))
self.scene.addItem(graphed_rect)
"""vertical line marks calculated contribution of attribute"""
self.atr_line = self.scene.addLine(atr_contrib_x, y + self.offset_y + 2, atr_contrib_x,
y + self.rect_height - self.offset_y - 2, self.blue_pen)
"""atr name and value on the left"""
self.place_left(QGraphicsSimpleTextItem(
atr_val, None), y + self.rect_height/2)
self.place_left_edge(QGraphicsSimpleTextItem(
atr_name, None), y + self.rect_height/2)
"""atr score on the right"""
self.place_right(self.format_marking(
atr_contrib), y + self.rect_height/2)
def place_left(self, text, y):
"""places text to the left"""
self.place_centered(text, 2 * self.space +
self.name_w + self.val_w/2, y)
def place_left_edge(self, text, y):
"""places text more left than place_left"""
self.scene.addLine(0, y, 0 - 10, y + 2, QPen(Qt.white, 0))
self.place_centered(text, self.space + self.name_w/2, y)
def place_right(self, text, y):
x = self.offset_left + 2 * self.atr_area_w + self.graph_space + 15
self.scene.addLine(x, y, x, y + 2, QPen(Qt.white, 0))
self.place_centered(text, self.offset_left + 2 *
self.atr_area_w + self.graph_space, y)
def place_centered(self, text, x, y):
"""centers the text around given coordinates"""
to_center = text.boundingRect().width()/2
text.setPos(x - to_center, y)
self.scene.addItem(text)
def split_boxes_area(self, h, num_boxes, header_h):
"""calculates y coordinates of boxes to be plotted, calculates rect_height
Parameters
---------
h : int
height of area
num_boxes : int
number of boxes to fill our area
header_h : int
height of header
Returns:
list y_coordinates
"""
return [(-h + i*self.rect_height) for i in range(num_boxes)]