def _find_font(self):
font = QFont()
wanted_size = self._point_size
font.setStyleStrategy(QFont.StyleStrategy(QFont.OpenGLCompatible | QFont.PreferAntialias))
fm = QFontMetricsF(font)
width = fm.width("888")
ratio = 1.8*wanted_size/max(width, fm.ascent())
self._font = font
self._font_zoom = ratio
def _find_font(self):
font = QFont()
wanted_size = self._point_size
font.setStyleStrategy(
QFont.StyleStrategy(QFont.OpenGLCompatible
| QFont.PreferAntialias))
fm = QFontMetricsF(font)
width = fm.width("888")
ratio = 1.8 * wanted_size / max(width, fm.ascent())
self._font = font
self._font_zoom = ratio
def draw(self, painter, size=None):
"""
:Arguments:
painter : QPainter
Opened painter on which to draw
"""
bounding_rect = QRectF()
position = self.position
transfer_function = self.transfer_function
font = QFont(self.font)
text_color = self.text_color
line_color = self.line_color
line_thickness = self.line_thickness
value_range = self.value_range
if size is None:
viewport = painter.viewport() # viewport rectangle
mat, ok = painter.worldMatrix().inverted()
if not ok:
raise ValueError(
"Transformation matrix of painter is singular.")
viewport = mat.mapRect(viewport)
else:
viewport = size
# First, prepare the gradient
w = viewport.width()
h = viewport.height()
#print("Size of viewport: {0}x{1}".format(w, h))
gr = QLinearGradient()
nb_values = ceil(w / 5.0)
brush_color = QColor()
for i in range(int(nb_values)):
brush_color.setRgbF(*transfer_function.rgba(i / nb_values))
gr.setColorAt(i / nb_values, brush_color)
# Second, find its position
metric = QFontMetricsF(font, painter.device())
font_test = [str(i) * 5 for i in range(10)]
lim_width = 0
lim_height = 0
for t in font_test:
rect = metric.boundingRect(t)
lim_width = max(lim_width, rect.width())
lim_height = max(lim_height, rect.height())
lim_height *= 3
length = self.scale_length
shift_length = (1 - length) / 2
width = self.scale_width
shift_width = self.scale_shift_width
delta_value = value_range[1] - value_range[0]
if position == "Top":
scale_rect = QRectF(shift_length * w, shift_width * h, length * w,
width * h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.left(), scale_rect.center().y())
gr.setFinalStop(scale_rect.right(), scale_rect.center().y())
start_pos = scale_rect.bottomLeft()
end_pos = scale_rect.bottomRight()
elif position == "Right":
scale_rect = QRectF((1 - shift_width - width) * w,
shift_length * h, width * w, length * h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.center().x(), scale_rect.bottom())
gr.setFinalStop(scale_rect.center().x(), scale_rect.top())
start_pos = scale_rect.bottomLeft()
end_pos = scale_rect.topLeft()
elif position == "Bottom":
scale_rect = QRectF(shift_length * w,
(1 - shift_width - width) * h, length * w,
width * h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.left(), scale_rect.center().y())
gr.setFinalStop(scale_rect.right(), scale_rect.center().y())
start_pos = scale_rect.topLeft()
end_pos = scale_rect.topRight()
elif position == "Left":
scale_rect = QRectF(shift_width * w, shift_length * h, width * w,
length * h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.center().x(), scale_rect.bottom())
gr.setFinalStop(scale_rect.center().x(), scale_rect.top())
start_pos = scale_rect.bottomRight()
end_pos = scale_rect.topRight()
else:
raise ValueError("Invalid scale position: %s" % position)
shift_pos = (end_pos - start_pos) / delta_value
if position in ["Left", "Right"]:
is_vertical = True
length = scale_rect.height()
else:
is_vertical = False
length = scale_rect.width()
# Get the ticks
ticks = self.selectValues(length, is_vertical, painter)
if len(ticks) == 0:
return
ticks_str, ticks_extra = self._tick2str(ticks)
# Figure the shifts
dist_to_bar = self.text_to_bar
max_width = 0
max_height = 0
for t in ticks_str:
rect = metric.boundingRect(t)
max_width = max(rect.width(), max_width)
max_height = max(rect.height(), max_height)
if position == "Left":
shift_left = dist_to_bar
shift_top = None
elif position == "Right":
shift_left = -dist_to_bar - max_width
shift_top = None
elif position == "Top":
shift_left = None
shift_top = dist_to_bar
else:
shift_left = None
shift_top = -dist_to_bar - max_height
painter.save()
painter.translate(viewport.topLeft())
#print("viewport.topLeft() = {0}x{1}".format(viewport.left(), viewport.top()))
painter.setBrush(gr)
line_pen = QPen(line_color)
line_pen.setWidth(line_thickness)
painter.setPen(line_pen)
painter.drawRect(scale_rect)
bounding_rect |= scale_rect
#print("Scale rect: +{0}+{1}x{2}x{3}".format(scale_rect.left(),
#scale_rect.top(), scale_rect.width(), scale_rect.height()))
painter.setFont(font)
painter.setPen(text_color)
for ts, t in zip(ticks_str, ticks):
r = metric.boundingRect(ts)
pos = start_pos + shift_pos * (t - value_range[0])
if shift_left is None:
pos.setX(pos.x() - r.width() / 2)
else:
pos.setX(pos.x() + shift_left)
if shift_top is None:
pos.setY(pos.y() - r.height() / 2)
else:
pos.setY(pos.y() + shift_top)
r.moveTo(pos)
real_rect = painter.drawText(
r, Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter, ts)
bounding_rect |= real_rect
if ticks_extra is not None or self.unit:
unit = self.unit
exp_width = width = space_width = 0
exp_txt = ""
r = exp_r = unit_r = QRectF()
exp_font = None
if ticks_extra is not None:
exp_txt = u"×10"
r = metric.boundingRect(exp_txt)
exp_font = QFont(font)
exp_size = self.exp_size
if exp_font.pixelSize() != -1:
exp_font.setPixelSize(exp_size * exp_font.pixelSize())
else:
exp_font.setPointSizeF(exp_size * exp_font.pointSizeF())
exp_metric = QFontMetricsF(exp_font, painter.device())
exp_r = exp_metric.boundingRect(ticks_extra)
if unit:
unit_r = metric.boundingRect(unit)
total_width = r.width() + exp_r.width() + unit_r.width()
total_height = max(r.height(),
unit_r.height()) + exp_r.height() / 2
pos = scale_rect.topRight()
log_debug("top right of scale bar = (%g,%g)" % (pos.x(), pos.y()))
log_debug("Size of image = (%d,%d)" % (w, h))
log_debug("Size of text = (%g,%g)" % (total_width, total_height))
if position == "Bottom":
pos.setY(pos.y() + scale_rect.height() + dist_to_bar)
pos.setX(pos.x() - total_width)
elif position == "Top":
pos.setY(pos.y() - dist_to_bar - total_height)
pos.setX(pos.x() - total_width)
else: # position == "left" or "right"
pos.setX(pos.x() - (scale_rect.width() + total_width) / 2)
if pos.x() < 0:
pos.setX(dist_to_bar)
elif pos.x() + total_width + dist_to_bar > w:
pos.setX(w - total_width - dist_to_bar)
pos.setY(pos.y() - dist_to_bar - total_height)
log_debug("Display unit at position: (%g,%g)" % (pos.x(), pos.y()))
if ticks_extra is not None:
r.moveTo(pos)
real_rect = painter.drawText(
r, Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter,
exp_txt)
bounding_rect |= real_rect
pos.setX(pos.x() + r.width())
pos.setY(pos.y() - metric.ascent() / 2)
exp_r.moveTo(pos)
painter.setFont(exp_font)
real_rect = painter.drawText(
exp_r, Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter,
ticks_extra)
bounding_rect |= real_rect
pos.setY(pos.y() + metric.ascent() / 2)
if unit:
pos.setX(pos.x() + space_width + exp_r.width())
unit_r.moveTo(pos)
painter.setFont(font)
real_rect = painter.drawText(
unit_r,
Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter, unit)
bounding_rect |= real_rect
# Draw the ticks now
painter.setPen(line_pen)
tick_size = self.tick_size
if is_vertical:
width = scale_rect.width() * tick_size
else:
width = scale_rect.height() * tick_size
pen_width = painter.pen().widthF()
if pen_width == 0:
pen_width = 1.0
for t in ticks:
pos1 = start_pos + shift_pos * (t - value_range[0])
pos2 = QPointF(pos1)
if is_vertical:
pos1.setX(scale_rect.left() + pen_width)
pos2.setX(pos1.x() + width - pen_width)
painter.drawLine(pos1, pos2)
pos1.setX(scale_rect.right() - pen_width)
pos2.setX(pos1.x() - width + pen_width)
painter.drawLine(pos1, pos2)
else:
pos1.setY(scale_rect.top() + pen_width)
pos2.setY(pos1.y() + width - pen_width)
painter.drawLine(pos1, pos2)
pos1.setY(scale_rect.bottom() - pen_width)
pos2.setY(pos1.y() - width + pen_width)
painter.drawLine(pos1, pos2)
painter.restore()
bounding_rect = bounding_rect.adjusted(-pen_width, -pen_width,
pen_width, pen_width)
return bounding_rect
def draw(self, painter, size = None):
"""
:Arguments:
painter : QPainter
Opened painter on which to draw
"""
bounding_rect = QRectF()
position = self.position
transfer_function = self.transfer_function
font = QFont(self.font)
text_color = self.text_color
line_color = self.line_color
line_thickness = self.line_thickness
value_range = self.value_range
if size is None:
viewport = painter.viewport() # viewport rectangle
mat, ok = painter.worldMatrix().inverted()
if not ok:
raise ValueError("Transformation matrix of painter is singular.")
viewport = mat.mapRect(viewport)
else:
viewport = size
# First, prepare the gradient
w = viewport.width()
h = viewport.height()
#print("Size of viewport: {0}x{1}".format(w, h))
gr = QLinearGradient()
nb_values = ceil(w/5.0)
brush_color = QColor()
for i in range(int(nb_values)):
brush_color.setRgbF(*transfer_function.rgba(i/nb_values))
gr.setColorAt(i/nb_values, brush_color)
# Second, find its position
metric = QFontMetricsF(font, painter.device())
font_test = [ str(i)*5 for i in range(10) ]
lim_width = 0
lim_height = 0
for t in font_test:
rect = metric.boundingRect(t)
lim_width = max(lim_width, rect.width())
lim_height = max(lim_height, rect.height())
lim_height *= 3
length = self.scale_length
shift_length = (1-length)/2
width = self.scale_width
shift_width = self.scale_shift_width
delta_value = value_range[1]-value_range[0]
if position == "Top":
scale_rect = QRectF(shift_length*w, shift_width*h, length*w, width*h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.left(), scale_rect.center().y())
gr.setFinalStop(scale_rect.right(), scale_rect.center().y())
start_pos = scale_rect.bottomLeft()
end_pos = scale_rect.bottomRight()
elif position == "Right":
scale_rect = QRectF((1-shift_width-width)*w, shift_length*h, width*w, length*h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.center().x(), scale_rect.bottom())
gr.setFinalStop(scale_rect.center().x(), scale_rect.top())
start_pos = scale_rect.bottomLeft()
end_pos = scale_rect.topLeft()
elif position == "Bottom":
scale_rect = QRectF(shift_length*w, (1-shift_width-width)*h, length*w, width*h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.left(), scale_rect.center().y())
gr.setFinalStop(scale_rect.right(), scale_rect.center().y())
start_pos = scale_rect.topLeft()
end_pos = scale_rect.topRight()
elif position == "Left":
scale_rect = QRectF(shift_width*w, shift_length*h, width*w, length*h)
limit_rect(scale_rect, viewport, lim_width, lim_height)
gr.setStart(scale_rect.center().x(), scale_rect.bottom())
gr.setFinalStop(scale_rect.center().x(), scale_rect.top())
start_pos = scale_rect.bottomRight()
end_pos = scale_rect.topRight()
else:
raise ValueError("Invalid scale position: %s" % position)
shift_pos = (end_pos-start_pos)/delta_value
if position in ["Left", "Right"]:
is_vertical = True
length = scale_rect.height()
else:
is_vertical = False
length = scale_rect.width()
# Get the ticks
ticks = self.selectValues(length, is_vertical, painter)
if len(ticks) == 0:
return
ticks_str, ticks_extra = self._tick2str(ticks)
# Figure the shifts
dist_to_bar = self.text_to_bar
max_width = 0
max_height = 0
for t in ticks_str:
rect = metric.boundingRect(t)
max_width = max(rect.width(), max_width)
max_height = max(rect.height(), max_height)
if position == "Left":
shift_left = dist_to_bar
shift_top = None
elif position == "Right":
shift_left = -dist_to_bar-max_width
shift_top = None
elif position == "Top":
shift_left = None
shift_top = dist_to_bar
else:
shift_left = None
shift_top = -dist_to_bar-max_height
painter.save()
painter.translate(viewport.topLeft())
#print("viewport.topLeft() = {0}x{1}".format(viewport.left(), viewport.top()))
painter.setBrush(gr)
line_pen = QPen(line_color)
line_pen.setWidth(line_thickness)
painter.setPen(line_pen)
painter.drawRect(scale_rect)
bounding_rect |= scale_rect
#print("Scale rect: +{0}+{1}x{2}x{3}".format(scale_rect.left(),
#scale_rect.top(), scale_rect.width(), scale_rect.height()))
painter.setFont(font)
painter.setPen(text_color)
for ts,t in zip(ticks_str, ticks):
r = metric.boundingRect(ts)
pos = start_pos+shift_pos*(t-value_range[0])
if shift_left is None:
pos.setX( pos.x() - r.width()/2 )
else:
pos.setX( pos.x() + shift_left )
if shift_top is None:
pos.setY( pos.y() - r.height()/2)
else:
pos.setY( pos.y() + shift_top )
r.moveTo(pos)
real_rect = painter.drawText(r, Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter, ts)
bounding_rect |= real_rect
if ticks_extra is not None or self.unit:
unit = self.unit
exp_width = width = space_width = 0
exp_txt = ""
r = exp_r = unit_r = QRectF()
exp_font = None
if ticks_extra is not None:
exp_txt = u"×10"
r = metric.boundingRect(exp_txt)
exp_font = QFont(font)
exp_size = self.exp_size
if exp_font.pixelSize() != -1:
exp_font.setPixelSize(exp_size*exp_font.pixelSize())
else:
exp_font.setPointSizeF(exp_size*exp_font.pointSizeF())
exp_metric = QFontMetricsF(exp_font, painter.device())
exp_r = exp_metric.boundingRect(ticks_extra)
if unit:
unit_r = metric.boundingRect(unit)
total_width = r.width()+exp_r.width()+unit_r.width()
total_height = max(r.height(),unit_r.height())+exp_r.height()/2
pos = scale_rect.topRight()
log_debug("top right of scale bar = (%g,%g)" % (pos.x(), pos.y()))
log_debug("Size of image = (%d,%d)" % (w,h))
log_debug("Size of text = (%g,%g)" % (total_width, total_height))
if position == "Bottom":
pos.setY(pos.y() + scale_rect.height() + dist_to_bar)
pos.setX(pos.x() - total_width)
elif position == "Top":
pos.setY(pos.y() - dist_to_bar - total_height)
pos.setX(pos.x() - total_width)
else: # position == "left" or "right"
pos.setX(pos.x() - (scale_rect.width() + total_width)/2)
if pos.x() < 0:
pos.setX(dist_to_bar)
elif pos.x()+total_width+dist_to_bar > w:
pos.setX(w - total_width - dist_to_bar)
pos.setY(pos.y() - dist_to_bar - total_height)
log_debug("Display unit at position: (%g,%g)" % (pos.x(), pos.y()))
if ticks_extra is not None:
r.moveTo(pos)
real_rect = painter.drawText(r, Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter, exp_txt)
bounding_rect |= real_rect
pos.setX( pos.x() + r.width() )
pos.setY( pos.y() - metric.ascent()/2 )
exp_r.moveTo(pos)
painter.setFont(exp_font)
real_rect = painter.drawText(exp_r, Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter, ticks_extra)
bounding_rect |= real_rect
pos.setY(pos.y() + metric.ascent()/2)
if unit:
pos.setX(pos.x() + space_width + exp_r.width())
unit_r.moveTo(pos)
painter.setFont(font)
real_rect = painter.drawText(unit_r, Qt.TextDontClip | Qt.AlignVCenter | Qt.AlignHCenter, unit)
bounding_rect |= real_rect
# Draw the ticks now
painter.setPen(line_pen)
tick_size = self.tick_size
if is_vertical:
width = scale_rect.width()*tick_size
else:
width = scale_rect.height()*tick_size
pen_width = painter.pen().widthF()
if pen_width == 0:
pen_width = 1.0
for t in ticks:
pos1 = start_pos + shift_pos*(t-value_range[0])
pos2 = QPointF(pos1)
if is_vertical:
pos1.setX(scale_rect.left() + pen_width)
pos2.setX(pos1.x() + width - pen_width)
painter.drawLine(pos1, pos2)
pos1.setX(scale_rect.right() - pen_width)
pos2.setX(pos1.x() - width + pen_width)
painter.drawLine(pos1, pos2)
else:
pos1.setY(scale_rect.top() + pen_width)
pos2.setY(pos1.y() + width - pen_width)
painter.drawLine(pos1, pos2)
pos1.setY(scale_rect.bottom() - pen_width)
pos2.setY(pos1.y() - width + pen_width)
painter.drawLine(pos1, pos2)
painter.restore()
bounding_rect = bounding_rect.adjusted(-pen_width, -pen_width, pen_width, pen_width)
return bounding_rect
