def calculateDatasets(self, scene, axes, datasets):
"""
Builds the datasets for this renderer. Each renderer will need to
subclass and implemenent this method, otherwise, no data will be
shown in the chart.
:param scene | <XChartScene>
axes | [<
datasets | [<XChartDataset>, ..]
"""
items = self.calculateDatasetItems(scene, datasets)
if not items:
scene.clear()
return
rect = self.buildData('axis_rect')
half_size = self.maximumBarSize() / 2.0
for dataset, item in items.items():
path = QPainterPath()
subpaths = []
for value in dataset.values():
pos = self.pointAt(axes, value)
radius = min(rect.bottom() - pos.y(), 8)
subpath = QPainterPath()
# create a vertical bar graph
if self.orientation() == Qt.Vertical:
subpath.moveTo(pos.x() - half_size, rect.bottom())
subpath.lineTo(pos.x() - half_size, pos.y() + radius)
subpath.quadTo(pos.x() - half_size, pos.y(),
pos.x() - half_size + radius, pos.y())
subpath.lineTo(pos.x() + half_size - radius, pos.y())
subpath.quadTo(pos.x() + half_size, pos.y(),
pos.x() + half_size,
pos.y() + radius)
subpath.lineTo(pos.x() + half_size, rect.bottom())
subpath.lineTo(pos.x() - half_size, rect.bottom())
# create a horizontal bar graph
else:
subpath.moveTo(rect.left(), pos.y() - half_size)
subpath.lineTo(pos.x(), pos.y() - half_size)
subpath.lineTo(pos.x(), pos.y() + half_size)
subpath.lineTo(rect.left(), pos.y() + half_size)
subpath.lineTo(rect.left(), pos.y() - half_size)
path.addPath(subpath)
subpaths.append(subpath)
item.setPath(path)
item.setBuildData('subpaths', subpaths)
def calculateDatasets(self, scene, axes, datasets):
"""
Builds the datasets for this renderer. Each renderer will need to
subclass and implemenent this method, otherwise, no data will be
shown in the chart.
:param scene | <XChartScene>
axes | [<
datasets | [<XChartDataset>, ..]
"""
items = self.calculateDatasetItems(scene, datasets)
if not items:
scene.clear()
return
rect = self.buildData('axis_rect')
half_size = self.maximumBarSize() / 2.0
for dataset, item in items.items():
path = QPainterPath()
subpaths = []
for value in dataset.values():
pos = self.pointAt(axes, value)
radius = min(rect.bottom() - pos.y(), 8)
subpath = QPainterPath()
# create a vertical bar graph
if self.orientation() == Qt.Vertical:
subpath.moveTo(pos.x() - half_size, rect.bottom())
subpath.lineTo(pos.x() - half_size, pos.y() + radius)
subpath.quadTo(pos.x() - half_size, pos.y(),
pos.x() - half_size + radius, pos.y())
subpath.lineTo(pos.x() + half_size - radius, pos.y())
subpath.quadTo(pos.x() + half_size, pos.y(),
pos.x() + half_size, pos.y() + radius)
subpath.lineTo(pos.x() + half_size, rect.bottom())
subpath.lineTo(pos.x() - half_size, rect.bottom())
# create a horizontal bar graph
else:
subpath.moveTo(rect.left(), pos.y() - half_size)
subpath.lineTo(pos.x(), pos.y() - half_size)
subpath.lineTo(pos.x(), pos.y() + half_size)
subpath.lineTo(rect.left(), pos.y() + half_size)
subpath.lineTo(rect.left(), pos.y() - half_size)
path.addPath(subpath)
subpaths.append(subpath)
item.setPath(path)
item.setBuildData('subpaths', subpaths)
def rebuild(self):
"""
Rebuilds the item based on the current points.
"""
scene = self.scene()
if not scene:
return
self._subpaths = []
grid = scene.gridRect()
typ = self.chartType()
hruler = scene.horizontalRuler()
vruler = scene.verticalRuler()
path = QPainterPath()
area = QPainterPath()
self._buildData.clear()
self._buildData['path_area'] = area
self.setPos(0, 0)
# draw a line item
if typ == XChartScene.Type.Line:
first = True
pos = None
home = None
self._ellipses = []
points = self.points()
if (self.orientation() == Qt.Horizontal):
points.sort(hruler.compareValues, key=lambda x: x[0])
else:
points.sort(vruler.compareValues, key=lambda y: y[1])
points.reverse()
for x, y in self.points():
pos = scene.mapFromChart(x, y)
if first:
home = QPointF(pos.x(), grid.bottom())
area.moveTo(home)
area.lineTo(pos)
path.moveTo(pos)
self._ellipses.append(pos)
first = False
else:
path.lineTo(pos)
area.lineTo(pos)
self._ellipses.append(pos)
if pos and home:
area.lineTo(pos.x(), grid.bottom())
area.lineTo(home)
# draw a bar item
elif typ == XChartScene.Type.Bar:
barsize = self.barSize()
horiz = self.orientation() == Qt.Horizontal
for x, y in self.points():
pos = scene.mapFromChart(x, y)
subpath = QPainterPath()
if horiz:
r = min(grid.bottom() - pos.y(), 8)
subpath.moveTo(pos.x() - barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, pos.y() + r)
subpath.quadTo(pos.x() - barsize / 2.0, pos.y(),
pos.x() - barsize / 2.0 + r, pos.y())
subpath.lineTo(pos.x() + barsize / 2.0 - r, pos.y())
subpath.quadTo(pos.x() + barsize / 2.0, pos.y(),
pos.x() + barsize / 2.0,
pos.y() + r)
subpath.lineTo(pos.x() + barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, grid.bottom())
else:
subpath.moveTo(grid.left(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() - barsize / 2.0)
path.addPath(subpath)
self._subpaths.append((x, y, subpath))
# draw a pie chart
elif typ == XChartScene.Type.Pie:
if self.orientation() == Qt.Horizontal:
key_index = 0
value_index = 1
value_ruler = self.verticalRuler()
else:
key_index = 1
value_index = 0
value_ruler = self.horizontalRuler()
pie_values = {}
for point in self.points():
key = point[key_index]
value = point[value_index]
pie_values.setdefault(key, [])
pie_values[key].append(value)
for key, values in pie_values.items():
pie_values[key] = value_ruler.calcTotal(values)
total = max(1, value_ruler.calcTotal(pie_values.values()))
# calculate drawing parameters
center = self.pieCenter()
radius = self.radius()
diameter = radius * 2
angle = 0
bound = QRectF(-radius, -radius, diameter, diameter)
for key, value in sorted(pie_values.items(), key=lambda x: x[1]):
# calculate the percentage
perc = float(value) / total
# calculate the angle as the perc * 360
item_angle = perc * 360
self.setPos(center)
sub_path = QPainterPath()
sub_path.arcTo(bound, angle, item_angle)
sub_path.lineTo(0, 0)
path.addPath(sub_path)
self._subpaths.append((key, value, sub_path))
angle += item_angle
self.setPath(path)
self._dirty = False
def rebuildMonth( self ):
"""
Rebuilds the current item in month mode.
"""
scene = self.scene()
if ( not scene ):
return
start_date = self.dateStart()
end_date = self.dateEnd()
min_date = scene.minimumDate()
max_date = scene.maximumDate()
# make sure our item is visible
if ( not (min_date <= end_date and start_date <= max_date)):
self.hide()
self.setPath(QPainterPath())
return
# make sure we have valid range information
if ( start_date < min_date ):
start_date = min_date
start_inrange = False
else:
start_inrange = True
if ( max_date < end_date ):
end_date = max_date
end_inrange = False
else:
end_inrange = True
start_rect = scene.dateRect(start_date)
end_rect = scene.dateRect(end_date)
if ( not (start_rect.isValid() and end_rect.isValid()) ):
self.hide()
return
# rebuild an all day path
path = QPainterPath()
self.setPos(0, 0)
pad = 2
offset = 18
height = 16
min_left = 10
max_right = scene.width() - 16
delta_h = start_rect.height()
# draw the all day event
if ( self.isAllDay() ):
top = start_rect.top()
left = start_rect.left() + 3
first = start_inrange
while ( top <= end_rect.top() ):
sub_path = QPainterPath()
# calculate the end position
if ( end_rect.top() - 2 <= top and end_inrange ):
at_end = True
right = end_rect.right() - pad
else:
at_end = False
right = max_right
if ( first ):
sub_path.moveTo(left, top + offset)
text_left = left + 4
else:
sub_path.moveTo(left + height / 2, top + offset)
text_left = left + height / 2 + 2
if ( at_end ):
sub_path.lineTo(right, top + offset)
sub_path.lineTo(right, top + offset + height)
else:
sub_path.lineTo(right - height / 2, top + offset)
sub_path.lineTo(right, top + offset + height / 2)
sub_path.lineTo(right - height / 2, top + offset + height)
if ( first ):
sub_path.lineTo(left, top + offset + height)
sub_path.lineTo(left, top + offset)
else:
sub_path.lineTo(left + height / 2, top + offset + height)
sub_path.lineTo(left, top + offset + height / 2)
sub_path.lineTo(left + height / 2, top + offset)
path.addPath(sub_path)
data = (text_left,
top + offset + 1,
right,
height,
Qt.AlignLeft | Qt.AlignVCenter,
self.title())
self._textData.append(data)
left = min_left
top += delta_h
first = False
else:
text = '%s: (%s)' % (self.timeStart().toString('h:mm ap'),
self.title())
font = scene.font()
left = start_rect.left() + 2 * pad
top = start_rect.top() + offset
path.addText(left, top + height / 2, font, text)
# setup the path for this item
self.setPath(path)
self.show()
# make sure there are no collisions
while ( self.collidingItems() ):
self.setPos(self.pos().x(), self.pos().y() + height + 2)
# hide the item if out of the visible scope
if ( delta_h - offset <= self.pos().y() + height ):
self.hide()
break
def calculateDatasets(self, scene, axes, datasets):
"""
Builds the datasets for this renderer. Each renderer will need to
subclass and implemenent this method, otherwise, no data will be
shown in the chart.
:param scene | <XChartScene>
axes | [<
datasets | [<XChartDataset>, ..]
"""
items = self.calculateDatasetItems(scene, datasets)
if not items:
scene.clear()
return
xaxis = scene.chart().horizontalAxis()
yaxis = scene.chart().verticalAxis()
data_axis = None
all_values = []
# determine if we're mapping data aginst the sets themselves, in
# which case, create a pie chart of the dataset vs. its
if isinstance(xaxis, XDatasetAxis):
per_dataset = False
data_axis = yaxis
total = 1
elif isinstance(yaxis, XDatasetAxis):
per_dataset = False
total = 1
data_axis = xaxis
else:
per_dataset = True
total = len(items)
if not per_dataset:
all_values = [dataset.sum(data_axis) \
for dataset in datasets]
# generate the build information
rect = self.buildData('grid_rect')
rect.setX(rect.x() + 10)
rect.setY(rect.y() + 10)
rect.setWidth(rect.width() - 20)
rect.setHeight(rect.height() - 20)
if rect.width() > rect.height():
radius = min(rect.width() / 2.0, rect.height() / 2.0)
x = rect.left()
y = rect.top() + radius
deltax = min(radius * 2, rect.width() / float(total + 1))
deltay = 0
else:
radius = min(rect.height() / 2.0, rect.width() / 2.0)
x = rect.left() + radius
y = rect.top()
deltax = 0
deltay = min(radius * 2, rect.height() / float(total + 1))
# initialize the first pie chart
angle = 0
cx = x + deltax
cy = y + deltay
x += deltax
y += deltay
self.setBuildData('center', QPointF(cx, cy))
self.setBuildData('radius', radius)
for dataset in datasets:
item = items.get(dataset)
if not item:
continue
item.setBuildData('center', QPointF(cx, cy))
item.setBuildData('radius', radius)
subpaths = []
bound = QRectF(cx-radius, cy-radius, radius * 2, radius * 2)
path = QPainterPath()
if per_dataset:
data_values = dataset.values(yaxis.name())
andle = 0
for value in dataset.values():
perc = yaxis.percentOfTotal(value.get(yaxis.name()),
data_values)
# calculate the angle as the perc
item_angle = perc * 360
subpath = QPainterPath()
subpath.moveTo(cx, cy)
subpath.arcTo(bound, angle, item_angle)
subpath.lineTo(cx, cy)
path.addPath(subpath)
subpaths.append((value.get(xaxis.name()), subpath))
angle += item_angle
cx = x + deltax
cy = y + deltay
x += deltax
y += deltay
else:
value = dataset.sum(data_axis)
perc = data_axis.percentOfTotal(value, all_values)
# calculate the angle as the perc
item_angle = perc * 360
subpath = QPainterPath()
subpath.moveTo(cx, cy)
subpath.arcTo(bound, angle, item_angle)
subpath.lineTo(cx, cy)
path.addPath(subpath)
subpaths.append((value, subpath))
angle += item_angle
item.setPath(path)
item.setBuildData('subpaths', subpaths)
def calculateDatasets(self, scene, axes, datasets):
"""
Builds the datasets for this renderer. Each renderer will need to
subclass and implemenent this method, otherwise, no data will be
shown in the chart.
:param scene | <XChartScene>
axes | [<
datasets | [<XChartDataset>, ..]
"""
items = self.calculateDatasetItems(scene, datasets)
if not items:
scene.clear()
return
xaxis = scene.chart().horizontalAxis()
yaxis = scene.chart().verticalAxis()
data_axis = None
all_values = []
# determine if we're mapping data aginst the sets themselves, in
# which case, create a pie chart of the dataset vs. its
if isinstance(xaxis, XDatasetAxis):
per_dataset = False
data_axis = yaxis
total = 1
elif isinstance(yaxis, XDatasetAxis):
per_dataset = False
total = 1
data_axis = xaxis
else:
per_dataset = True
total = len(items)
if not per_dataset:
all_values = [dataset.sum(data_axis) \
for dataset in datasets]
# generate the build information
rect = self.buildData('grid_rect')
rect.setX(rect.x() + 10)
rect.setY(rect.y() + 10)
rect.setWidth(rect.width() - 20)
rect.setHeight(rect.height() - 20)
if rect.width() > rect.height():
radius = min(rect.width() / 2.0, rect.height() / 2.0)
x = rect.left()
y = rect.top() + radius
deltax = min(radius * 2, rect.width() / float(total + 1))
deltay = 0
else:
radius = min(rect.height() / 2.0, rect.width() / 2.0)
x = rect.left() + radius
y = rect.top()
deltax = 0
deltay = min(radius * 2, rect.height() / float(total + 1))
# initialize the first pie chart
angle = 0
cx = x + deltax
cy = y + deltay
x += deltax
y += deltay
self.setBuildData('center', QPointF(cx, cy))
self.setBuildData('radius', radius)
for dataset in datasets:
item = items.get(dataset)
if not item:
continue
item.setBuildData('center', QPointF(cx, cy))
item.setBuildData('radius', radius)
subpaths = []
bound = QRectF(cx - radius, cy - radius, radius * 2, radius * 2)
path = QPainterPath()
if per_dataset:
data_values = dataset.values(yaxis.name())
andle = 0
for value in dataset.values():
perc = yaxis.percentOfTotal(value.get(yaxis.name()),
data_values)
# calculate the angle as the perc
item_angle = perc * 360
subpath = QPainterPath()
subpath.moveTo(cx, cy)
subpath.arcTo(bound, angle, item_angle)
subpath.lineTo(cx, cy)
path.addPath(subpath)
subpaths.append((value.get(xaxis.name()), subpath))
angle += item_angle
cx = x + deltax
cy = y + deltay
x += deltax
y += deltay
else:
value = dataset.sum(data_axis)
perc = data_axis.percentOfTotal(value, all_values)
# calculate the angle as the perc
item_angle = perc * 360
subpath = QPainterPath()
subpath.moveTo(cx, cy)
subpath.arcTo(bound, angle, item_angle)
subpath.lineTo(cx, cy)
path.addPath(subpath)
subpaths.append((value, subpath))
angle += item_angle
item.setPath(path)
item.setBuildData('subpaths', subpaths)
def rebuild( self ):
"""
Rebuilds the item based on the current points.
"""
scene = self.scene()
if not scene:
return
self._subpaths = []
grid = scene.gridRect()
typ = self.chartType()
hruler = scene.horizontalRuler()
vruler = scene.verticalRuler()
path = QPainterPath()
area = QPainterPath()
self._buildData.clear()
self._buildData['path_area'] = area
self.setPos(0, 0)
# draw a line item
if typ == XChartScene.Type.Line:
first = True
pos = None
home = None
self._ellipses = []
points = self.points()
if ( self.orientation() == Qt.Horizontal ):
points.sort(hruler.compareValues, key = lambda x: x[0])
else:
points.sort(vruler.compareValues, key = lambda y: y[1])
points.reverse()
for x, y in self.points():
pos = scene.mapFromChart(x, y)
if first:
home = QPointF(pos.x(), grid.bottom())
area.moveTo(home)
area.lineTo(pos)
path.moveTo(pos)
self._ellipses.append(pos)
first = False
else:
path.lineTo(pos)
area.lineTo(pos)
self._ellipses.append(pos)
if pos and home:
area.lineTo(pos.x(), grid.bottom())
area.lineTo(home)
# draw a bar item
elif typ == XChartScene.Type.Bar:
barsize = self.barSize()
horiz = self.orientation() == Qt.Horizontal
for x, y in self.points():
pos = scene.mapFromChart(x, y)
subpath = QPainterPath()
if horiz:
r = min(grid.bottom() - pos.y(), 8)
subpath.moveTo(pos.x() - barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, pos.y() + r)
subpath.quadTo(pos.x() - barsize / 2.0, pos.y(),
pos.x() - barsize / 2.0 + r, pos.y())
subpath.lineTo(pos.x() + barsize / 2.0 - r, pos.y())
subpath.quadTo(pos.x() + barsize / 2.0, pos.y(),
pos.x() + barsize / 2.0, pos.y() + r)
subpath.lineTo(pos.x() + barsize / 2.0, grid.bottom())
subpath.lineTo(pos.x() - barsize / 2.0, grid.bottom())
else:
subpath.moveTo(grid.left(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() - barsize / 2.0)
subpath.lineTo(pos.x(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() + barsize / 2.0)
subpath.lineTo(grid.left(), pos.y() - barsize / 2.0)
path.addPath(subpath)
self._subpaths.append((x, y, subpath))
# draw a pie chart
elif typ == XChartScene.Type.Pie:
if self.orientation() == Qt.Horizontal:
key_index = 0
value_index = 1
value_ruler = self.verticalRuler()
else:
key_index = 1
value_index = 0
value_ruler = self.horizontalRuler()
pie_values = {}
for point in self.points():
key = point[key_index]
value = point[value_index]
pie_values.setdefault(key, [])
pie_values[key].append(value)
for key, values in pie_values.items():
pie_values[key] = value_ruler.calcTotal(values)
total = max(1, value_ruler.calcTotal(pie_values.values()))
# calculate drawing parameters
center = self.pieCenter()
radius = self.radius()
diameter = radius * 2
angle = 0
bound = QRectF(-radius, -radius, diameter, diameter)
for key, value in sorted(pie_values.items(), key = lambda x: x[1]):
# calculate the percentage
perc = float(value) / total
# calculate the angle as the perc * 360
item_angle = perc * 360
self.setPos(center)
sub_path = QPainterPath()
sub_path.arcTo(bound, angle, item_angle)
sub_path.lineTo(0, 0)
path.addPath(sub_path)
self._subpaths.append((key, value, sub_path))
angle += item_angle
self.setPath(path)
self._dirty = False
def rebuildMonth(self):
"""
Rebuilds the current item in month mode.
"""
scene = self.scene()
if (not scene):
return
start_date = self.dateStart()
end_date = self.dateEnd()
min_date = scene.minimumDate()
max_date = scene.maximumDate()
# make sure our item is visible
if (not (min_date <= end_date and start_date <= max_date)):
self.hide()
self.setPath(QPainterPath())
return
# make sure we have valid range information
if (start_date < min_date):
start_date = min_date
start_inrange = False
else:
start_inrange = True
if (max_date < end_date):
end_date = max_date
end_inrange = False
else:
end_inrange = True
start_rect = scene.dateRect(start_date)
end_rect = scene.dateRect(end_date)
if (not (start_rect.isValid() and end_rect.isValid())):
self.hide()
return
# rebuild an all day path
path = QPainterPath()
self.setPos(0, 0)
pad = 2
offset = 18
height = 16
min_left = 10
max_right = scene.width() - 16
delta_h = start_rect.height()
# draw the all day event
if (self.isAllDay()):
top = start_rect.top()
left = start_rect.left() + 3
first = start_inrange
while (top <= end_rect.top()):
sub_path = QPainterPath()
# calculate the end position
if (end_rect.top() - 2 <= top and end_inrange):
at_end = True
right = end_rect.right() - pad
else:
at_end = False
right = max_right
if (first):
sub_path.moveTo(left, top + offset)
text_left = left + 4
else:
sub_path.moveTo(left + height / 2, top + offset)
text_left = left + height / 2 + 2
if (at_end):
sub_path.lineTo(right, top + offset)
sub_path.lineTo(right, top + offset + height)
else:
sub_path.lineTo(right - height / 2, top + offset)
sub_path.lineTo(right, top + offset + height / 2)
sub_path.lineTo(right - height / 2, top + offset + height)
if (first):
sub_path.lineTo(left, top + offset + height)
sub_path.lineTo(left, top + offset)
else:
sub_path.lineTo(left + height / 2, top + offset + height)
sub_path.lineTo(left, top + offset + height / 2)
sub_path.lineTo(left + height / 2, top + offset)
path.addPath(sub_path)
data = (text_left, top + offset + 1, right, height,
Qt.AlignLeft | Qt.AlignVCenter, self.title())
self._textData.append(data)
left = min_left
top += delta_h
first = False
else:
text = '%s: (%s)' % (self.timeStart().toString('h:mm ap'),
self.title())
font = scene.font()
left = start_rect.left() + 2 * pad
top = start_rect.top() + offset
path.addText(left, top + height / 2, font, text)
# setup the path for this item
self.setPath(path)
self.show()
# make sure there are no collisions
while (self.collidingItems()):
self.setPos(self.pos().x(), self.pos().y() + height + 2)
# hide the item if out of the visible scope
if (delta_h - offset <= self.pos().y() + height):
self.hide()
break