def on_chart_draw(self, widget, ctx):
# This should not happen actually, but be sure.
if self.selected_cluster and self.selected_doc:
lines = []
for doc in self.selected_cluster.docs:
distance = self.selected_doc.distances[doc.name]
cut_path = os.path.basename(doc.path)
lines.append((cut_path[:20], distance * 100))
# Use this for logarithmic scale:
#lines.append((cut_path[:20], math.log10(distance * 100 + 1) / 2.0))
if len(lines) > 1:
# This matches the chart background color
ctx.set_source_rgb(0.96, 0.96, 0.96)
ctx.paint()
# Build actual indexed dataset from lines
dataSet = (
('docs', [(i, l[1]) for i, l in enumerate(lines)]),
)
# Grid legend scaling
CHART_OPTIONS['axis']['x']['ticks'] = [dict(v=i, label=l[0]) for i, l in enumerate(lines)]
# Actually draw the chart on the surface provided by ctx
chart = LineChart(ctx.get_target(), CHART_OPTIONS)
chart.addDataset(dataSet)
chart.render()
else:
# No data to display, so just display a nicely rendererd "NO!
alloc = widget.get_allocation()
ctx.set_source_rgb(0.5, 0.5, 0.5)
# Draw text exactly centered in the widget center, with a
# certain offset in height
def draw_center_text(text, font_size=15, height_off=0):
ctx.set_font_size(font_size)
extents = ctx.text_extents(text)
ctx.move_to(alloc.width / 2 - extents[2] / 2, alloc.height / 2 - height_off)
ctx.show_text(text)
# Now you gonna see if your font is good :-)
draw_center_text('№', 100, +30)
draw_center_text('⦃ only one document in cluster ⦄')
# Draw current state
ctx.stroke()
def testLine():
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 600, 500)
chart = LineChart(surface)
dataSet = (
('myFirstDataset', [[0, 3], [1, 2], [2, 1.414], [3, 2.3]]),
('mySecondDataset', [[0, 1.4], [1, 2.67], [2, 1.34], [3, 1.2]]),
('myThirdDataset', [[0, 0.46], [1, 1.45], [2, 1.0], [3, 1.6]]),
('myFourthDataset', [[0, 0.3], [1, 0.83], [2, 0.7], [3, 0.2]]),
)
chart.addDataset(dataSet)
chart.render()
surface.write_to_png("testline.png")
def testLine():
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 600, 500)
chart = LineChart(surface)
dataSet = (
('myFirstDataset', [[0, 3], [1, 2], [2, 1.414], [3, 2.3]]),
('mySecondDataset', [[0, 1.4], [1, 2.67], [2, 1.34], [3, 1.2]]),
('myThirdDataset', [[0, 0.46], [1, 1.45], [2, 1.0], [3, 1.6]]),
('myFourthDataset', [[0, 0.3], [1, 0.83], [2, 0.7], [3, 0.2]]),
)
chart.addDataset(dataSet)
chart.render()
surface.write_to_png("testline.png")
def plot(self): """Initializes chart (if needed), set data and plots.""" chart = LineChart(self._surface, self._options) chart.addDataset(self._data) chart.render()
def plot(self):
"""Initializes chart (if needed), set data and plots."""
chart = LineChart(self._surface, self._options)
chart.addDataset(self._data)
chart.render()
