def _GetAxisParams(self, chart):
"""Collect params related to our various axes (x, y, right-hand)."""
axis_types = []
axis_ranges = []
axis_labels = []
axis_label_positions = []
axis_label_gridlines = []
mark_length = max(self._width, self._height)
for i, axis_pair in enumerate(a for a in chart._GetAxes()
if a[1].labels):
axis_type_code, axis = axis_pair
axis_types.append(axis_type_code)
if axis.min is not None or axis.max is not None:
assert axis.min is not None # Sanity check: both min & max must be set.
assert axis.max is not None
axis_ranges.append('%s,%s,%s' % (i, axis.min, axis.max))
labels, positions = self._GetAxisLabelsAndPositions(axis, chart)
if labels:
axis_labels.append('%s:' % i)
axis_labels.extend(labels)
if positions:
positions = [i] + list(positions)
axis_label_positions.append(','.join(
str(x) for x in positions))
if axis.label_gridlines:
axis_label_gridlines.append("%d,%d" % (i, -mark_length))
return util.JoinLists(
axis_type=axis_types,
axis_range=axis_ranges,
axis_label=axis_labels,
axis_position=axis_label_positions,
axis_tick_marks=axis_label_gridlines,
)
def _GetColors(self, chart):
"""Color series color parameter."""
colors = []
for series in chart.data:
if not series.data:
continue
colors.append(series.style.color)
return util.JoinLists(color=colors)
def _GetColors(self, chart):
if chart._colors:
# Colors were overridden by the user
colors = chart._colors
else:
# Build the list of colors from individual segments
colors = []
for pie in chart.data:
for segment in pie:
if segment and segment.color:
colors.append(segment.color)
return util.JoinLists(color=colors)
def _GetLineStyles(self, chart):
"""Get LineStyle parameters."""
styles = []
for series in chart.data:
style = series.style
if style:
styles.append('%s,%s,%s' % (style.width, style.on, style.off))
else:
# If one style is missing, they must all be missing
# TODO: Add a test for this; throw a more meaningful exception
assert (not styles)
return util.JoinLists(line_style=styles)
def _GetDataSeriesParams(self, chart):
"""Collect params related to the data series."""
pie_points = []
labels = []
max_val = 1
for pie in chart.data:
points = []
for segment in pie:
if segment:
points.append(segment.size)
max_val = max(max_val, segment.size)
labels.append(segment.label or '')
if points:
pie_points.append(points)
encoder = self._GetDataEncoder(chart)
result = util.EncodeData(chart, pie_points, 0, max_val, encoder)
result.update(util.JoinLists(label=labels))
return result
def _GetDataSeriesParams(self, chart):
"""Collect params related to the data series."""
y_min, y_max = chart.GetDependentAxis().min, chart.GetDependentAxis(
).max
series_data = []
markers = []
for i, series in enumerate(chart.data):
data = series.data
if not data: # Drop empty series.
continue
series_data.append(data)
for x, marker in series.markers:
args = [marker.shape, marker.color, i, x, marker.size]
markers.append(','.join(str(arg) for arg in args))
encoder = self._GetDataEncoder(chart)
result = util.EncodeData(chart, series_data, y_min, y_max, encoder)
result.update(util.JoinLists(marker=markers))
return result
def _ApplyBarChartStyle(self, chart):
"""If bar style is specified, fill in the missing data and apply it."""
# sanity checks
if chart.style is None or not chart.data:
return {}
(bar_thickness, bar_gap,
group_gap) = (chart.style.bar_thickness, chart.style.bar_gap,
chart.style.group_gap)
# Auto-size bar/group gaps
if bar_gap is None and group_gap is not None:
bar_gap = max(0, group_gap / 2)
if not chart.style.use_fractional_gap_spacing:
bar_gap = int(bar_gap)
if group_gap is None and bar_gap is not None:
group_gap = max(0, bar_gap * 2)
# Set bar thickness to auto if it is missing
if bar_thickness is None:
if chart.style.use_fractional_gap_spacing:
bar_thickness = 'r'
else:
bar_thickness = 'a'
else:
# Convert gap sizes to pixels if needed
if chart.style.use_fractional_gap_spacing:
if bar_gap:
bar_gap = int(bar_thickness * bar_gap)
if group_gap:
group_gap = int(bar_thickness * group_gap)
# Build a valid spec; ignore group gap if chart is stacked,
# since there are no groups in that case
spec = [bar_thickness]
if bar_gap is not None:
spec.append(bar_gap)
if group_gap is not None and not chart.stacked:
spec.append(group_gap)
return util.JoinLists(bar_size=spec)
def _GetLegendParams(self, chart):
"""Get params for showing a legend."""
if chart._show_legend:
return util.JoinLists(data_series_label=chart._legend_labels)
return {}