def _renderBackground(self, cx):
"""Renders the background area of the chart"""
if self.options.background.hide:
return
cx.save()
if self.options.background.baseColor:
cx.set_source_rgb(*hex2rgb(self.options.background.baseColor))
cx.paint()
if self.options.background.chartColor:
cx.set_source_rgb(*hex2rgb(self.options.background.chartColor))
surface_width, surface_height = self.getSurfaceSize()
cx.rectangle(self.options.padding.left, self.options.padding.top,
surface_width - (self.options.padding.left
+ self.options.padding.right),
surface_height - (self.options.padding.top
+ self.options.padding.bottom))
cx.fill()
if self.options.background.lineColor:
cx.set_source_rgb(*hex2rgb(self.options.background.lineColor))
cx.set_line_width(self.options.axis.lineWidth)
self._renderLines(cx)
cx.restore()
def _renderAxis(self, cx):
"""Renders axis"""
if self.options.axis.x.hide and self.options.axis.y.hide:
return
cx.save()
cx.set_line_width(self.options.axis.lineWidth)
if not self.options.axis.y.hide:
if self.yticks:
for tick in self.yticks:
self._renderYTick(cx, tick)
if self.options.axis.y.label:
self._renderYAxisLabel(cx, self.options.axis.y.label)
cx.set_source_rgb(*hex2rgb(self.options.axis.lineColor))
self._renderYAxis(cx)
if not self.options.axis.x.hide:
if self.xticks:
for tick in self.xticks:
self._renderXTick(cx, tick)
if self.options.axis.x.label:
self._renderXAxisLabel(cx, self.options.axis.x.label)
cx.set_source_rgb(*hex2rgb(self.options.axis.lineColor))
self._renderXAxis(cx)
cx.restore()
def _renderBackground(self, cx):
"""Renders the background area of the chart"""
if self.options.background.hide:
return
cx.save()
if self.options.background.baseColor:
cx.set_source_rgb(*hex2rgb(self.options.background.baseColor))
cx.paint()
if self.options.background.chartColor:
cx.set_source_rgb(*hex2rgb(self.options.background.chartColor))
cx.set_line_width(10.0)
cx.arc(self.layout.chart.x + self.layout.chart.w / 2,
self.layout.chart.y + self.layout.chart.h / 2,
min(self.layout.chart.w / 2, self.layout.chart.h / 2),
0, 2 * math.pi)
cx.fill()
if self.options.background.lineColor:
cx.set_source_rgb(*hex2rgb(self.options.background.lineColor))
cx.set_line_width(self.options.axis.lineWidth)
self._renderLines(cx)
cx.restore()
def _renderAxisLabel(self, cx, label, x, y, vertical=False):
cx.save()
cx.select_font_face(self.options.axis.labelFont,
cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_BOLD)
cx.set_font_size(self.options.axis.labelFontSize)
cx.set_source_rgb(*hex2rgb(self.options.axis.labelColor))
xb, yb, width, height, xa, ya = cx.text_extents(label)
if vertical:
y = y + width / 2.0
cx.move_to(x - xb, y - yb)
cx.translate(x, y)
cx.rotate(-math.radians(90))
cx.move_to(-xb, -yb)
cx.show_text(label)
if self.debug:
cx.rectangle(0, 0, width, height)
cx.stroke()
else:
x = x - width / 2.0
cx.move_to(x - xb, y - yb)
cx.show_text(label)
if self.debug:
cx.rectangle(x, y, width, height)
cx.stroke()
cx.restore()
def _renderAxis(self, cx):
"""Renders the axis for pie charts"""
if self.options.axis.x.hide or not self.xticks:
return
self.xlabels = []
if self.debug:
px = max(cx.device_to_user_distance(1, 1))
cx.set_source_rgba(0, 0, 1, 0.5)
for x, y, w, h in self.layout.ticks:
cx.rectangle(x, y, w, h)
cx.stroke()
cx.arc(x + w / 2.0, y + h / 2.0, 5 * px, 0, 2 * math.pi)
cx.fill()
cx.arc(x, y, 2 * px, 0, 2 * math.pi)
cx.fill()
cx.select_font_face(self.options.axis.tickFont,
cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_NORMAL)
cx.set_font_size(self.options.axis.tickFontSize)
cx.set_source_rgb(*hex2rgb(self.options.axis.labelColor))
for i, tick in enumerate(self.xticks):
label = tick[1]
x, y, w, h = self.layout.ticks[i]
xb, yb, width, height, xa, ya = cx.text_extents(label)
# draw label with text tick[1]
cx.move_to(x - xb, y - yb)
cx.show_text(label)
self.xlabels.append(label)
def _renderTick(self, cx, tick, x, y, x2, y2, rotate, text_position):
"""Aux method for _renderXTick and _renderYTick"""
if callable(tick):
return
cx.new_path()
cx.move_to(x, y)
cx.line_to(x2, y2)
cx.close_path()
cx.stroke()
cx.set_source_rgb(*hex2rgb('#000000'))
cx.select_font_face(self.options.axis.tickFont,
cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_NORMAL)
cx.set_font_size(self.options.axis.tickFontSize)
label = safe_unicode(tick[1], self.options.encoding)
xb, yb, width, height, xa, ya = cx.text_extents(label)
x, y = text_position
if rotate:
cx.save()
cx.translate(x, y)
cx.rotate(math.radians(rotate))
x = -width / 2.0
y = -height / 2.0
cx.move_to(x - xb, y - yb)
cx.show_text(label)
cx.set_source_rgb(*hex2rgb(self.options.axis.lineColor))
if self.debug:
cx.rectangle(x, y, width, height)
cx.stroke()
cx.restore()
else:
x -= width / 2.0
y -= height / 2.0
cx.move_to(x - xb, y - yb)
cx.show_text(label)
cx.set_source_rgb(*hex2rgb(self.options.axis.lineColor))
if self.debug:
cx.rectangle(x, y, width, height)
cx.stroke()
return label
def _renderBackground(self, cx):
"""Renders the background area of the chart"""
if self.options.background.hide:
return
cx.save()
if self.options.background.baseColor:
cx.set_source_rgb(*hex2rgb(self.options.background.baseColor))
cx.paint()
if self.options.background.chartColor:
cx.set_source_rgb(*hex2rgb(self.options.background.chartColor))
cx.set_line_width(10.0)
cx.new_path()
init = None
count = len(self.xticks)
for index, tick in enumerate(self.xticks):
ang = math.pi / 2 - index * 2 * math.pi / count
x = (self.layout.chart.x + self.layout.chart.w / 2
- math.cos(ang)
* min(self.layout.chart.w / 2, self.layout.chart.h / 2))
y = (self.layout.chart.y + self.layout.chart.h / 2
- math.sin(ang)
* min(self.layout.chart.w / 2, self.layout.chart.h / 2))
if init is None:
cx.move_to(x, y)
init = (x, y)
else:
cx.line_to(x, y)
cx.line_to(init[0], init[1])
cx.close_path()
cx.fill()
if self.options.background.lineColor:
cx.set_source_rgb(*hex2rgb(self.options.background.lineColor))
cx.set_line_width(self.options.axis.lineWidth)
self._renderLines(cx)
cx.restore()
def _renderChart(self, cx):
"""Renders a pie chart"""
self.centerx = self.layout.chart.x + self.layout.chart.w * 0.5
self.centery = self.layout.chart.y + self.layout.chart.h * 0.5
cx.set_line_join(cairo.LINE_JOIN_ROUND)
if self.options.stroke.shadow and False:
cx.save()
cx.set_source_rgba(0, 0, 0, 0.15)
cx.new_path()
cx.move_to(self.centerx, self.centery)
cx.arc(self.centerx + 1, self.centery + 2,
self.layout.radius + 1, 0, math.pi * 2)
cx.line_to(self.centerx, self.centery)
cx.close_path()
cx.fill()
cx.restore()
cx.save()
for slice in self.slices:
if slice.isBigEnough():
cx.set_source_rgb(*self.colorScheme[slice.name])
if self.options.shouldFill:
slice.draw(cx, self.centerx, self.centery,
self.layout.radius)
cx.fill()
if not self.options.stroke.hide:
slice.draw(cx, self.centerx, self.centery,
self.layout.radius)
cx.set_line_width(self.options.stroke.width)
cx.set_source_rgb(*hex2rgb(self.options.stroke.color))
cx.stroke()
cx.restore()
if self.debug:
cx.set_source_rgba(1, 0, 0, 0.5)
px = max(cx.device_to_user_distance(1, 1))
for x, y in self.layout._lines:
cx.arc(x, y, 5 * px, 0, 2 * math.pi)
cx.fill()
cx.new_path()
cx.move_to(self.centerx, self.centery)
cx.line_to(x, y)
cx.stroke()
def _renderChart(self, cx):
"""Renders a pie chart"""
self.centerx = self.layout.chart.x + self.layout.chart.w * 0.5
self.centery = self.layout.chart.y + self.layout.chart.h * 0.5
cx.set_line_join(cairo.LINE_JOIN_ROUND)
if self.options.stroke.shadow and False:
cx.save()
cx.set_source_rgba(0, 0, 0, 0.15)
cx.new_path()
cx.move_to(self.centerx, self.centery)
cx.arc(self.centerx + 1, self.centery + 2, self.layout.radius + 1,
0, math.pi * 2)
cx.line_to(self.centerx, self.centery)
cx.close_path()
cx.fill()
cx.restore()
cx.save()
for slice in self.slices:
if slice.isBigEnough():
cx.set_source_rgb(*self.colorScheme[slice.name])
if self.options.shouldFill:
slice.draw(cx, self.centerx, self.centery,
self.layout.radius)
cx.fill()
if not self.options.stroke.hide:
slice.draw(cx, self.centerx, self.centery,
self.layout.radius)
cx.set_line_width(self.options.stroke.width)
cx.set_source_rgb(*hex2rgb(self.options.stroke.color))
cx.stroke()
cx.restore()
if self.debug:
cx.set_source_rgba(1, 0, 0, 0.5)
px = max(cx.device_to_user_distance(1, 1))
for x, y in self.layout._lines:
cx.arc(x, y, 5 * px, 0, 2 * math.pi)
cx.fill()
cx.new_path()
cx.move_to(self.centerx, self.centery)
cx.line_to(x, y)
cx.stroke()
def drawLine(storeName):
if self.options.stroke.shadow:
# draw shadow
cx.save()
cx.set_source_rgba(0, 0, 0, 0.15)
cx.translate(2, -2)
preparePath(storeName)
cx.fill()
cx.restore()
# fill the line
cx.set_source_rgb(*self.colorScheme[storeName])
preparePath(storeName)
cx.fill()
if not self.options.stroke.hide:
# draw stroke
cx.set_source_rgb(*hex2rgb(self.options.stroke.color))
preparePath(storeName)
cx.stroke()
def drawLine(storeName):
if self.options.stroke.shadow:
# draw shadow
cx.save()
cx.set_source_rgba(0, 0, 0, 0.15)
cx.translate(2, -2)
preparePath(storeName)
cx.fill()
cx.restore()
# fill the line
cx.set_source_rgb(*self.colorScheme[storeName])
preparePath(storeName)
cx.fill()
if not self.options.stroke.hide:
# draw stroke
cx.set_source_rgb(*hex2rgb(self.options.stroke.color))
preparePath(storeName)
cx.stroke()
def _renderTitle(self, cx):
if self.options.title:
cx.save()
cx.select_font_face(self.options.titleFont,
cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_BOLD)
cx.set_font_size(self.options.titleFontSize)
cx.set_source_rgb(*hex2rgb(self.options.titleColor))
title = safe_unicode(self.options.title, self.options.encoding)
extents = cx.text_extents(title)
title_width = extents[2]
x = (self.layout.title.x + self.layout.title.w / 2.0 -
title_width / 2.0)
y = self.layout.title.y - extents[1] - 10
cx.move_to(x, y)
cx.show_text(title)
cx.restore()
def _renderAxis(self, cx):
"""Renders axis"""
if self.options.axis.x.hide and self.options.axis.y.hide:
return
cx.save()
cx.set_source_rgb(*hex2rgb(self.options.axis.lineColor))
cx.set_line_width(self.options.axis.lineWidth)
centerx = self.layout.chart.x + self.layout.chart.w / 2
centery = self.layout.chart.y + self.layout.chart.h / 2
if not self.options.axis.y.hide:
if self.yticks:
count = len(self.yticks)
for i in range(0, count):
self._renderYTick(cx, i, (centerx, centery))
if self.options.axis.y.label:
self._renderYAxisLabel(cx, self.options.axis.y.label)
self._renderYAxis(cx)
if not self.options.axis.x.hide:
fontAscent = cx.font_extents()[0]
if self.xticks:
count = len(self.xticks)
for i in range(0, count):
self._renderXTick(cx, i, fontAscent, (centerx, centery))
if self.options.axis.x.label:
self._renderXAxisLabel(cx, self.options.axis.x.label)
self._renderXAxis(cx)
cx.restore()
def _renderTitle(self, cx):
if self.options.title:
cx.save()
cx.select_font_face(self.options.titleFont,
cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_BOLD)
cx.set_font_size(self.options.titleFontSize)
cx.set_source_rgb(*hex2rgb(self.options.titleColor))
title = safe_unicode(self.options.title, self.options.encoding)
extents = cx.text_extents(title)
title_width = extents[2]
x = (self.layout.title.x
+ self.layout.title.w / 2.0
- title_width / 2.0)
y = self.layout.title.y - extents[1] - 10
cx.move_to(x, y)
cx.show_text(title)
cx.restore()
def _renderLegend(self, cx):
"""This function adds a legend to the chart"""
if self.options.legend.hide:
return
surface_width, surface_height = self.getSurfaceSize()
# Compute legend dimensions
padding = 4
bullet = 15
width = 0
height = padding
keys = self._getDatasetsKeys()
cx.select_font_face(self.options.legend.legendFont,
cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
cx.set_font_size(self.options.legend.legendFontSize)
for key in keys:
key = safe_unicode(key, self.options.encoding)
extents = cx.text_extents(key)
width = max(extents[2], width)
height += max(extents[3], bullet) + padding
width = padding + bullet + padding + width + padding
# Compute legend position
legend = self.options.legend
if legend.position.right is not None:
legend.position.left = (surface_width - legend.position.right -
width)
if legend.position.bottom is not None:
legend.position.top = (surface_height - legend.position.bottom -
height)
# Draw the legend
cx.save()
cx.rectangle(self.options.legend.position.left,
self.options.legend.position.top, width, height)
cx.set_source_rgba(1, 1, 1, self.options.legend.opacity)
cx.fill_preserve()
cx.set_line_width(self.options.legend.borderWidth)
cx.set_source_rgb(*hex2rgb(self.options.legend.borderColor))
cx.stroke()
def drawKey(key, x, y, text_height):
cx.rectangle(x, y, bullet, bullet)
cx.set_source_rgb(*self.colorScheme[key])
cx.fill_preserve()
cx.set_source_rgb(0, 0, 0)
cx.stroke()
cx.move_to(x + bullet + padding,
y + bullet / 2.0 + text_height / 2.0)
cx.show_text(key)
cx.set_line_width(1)
x = self.options.legend.position.left + padding
y = self.options.legend.position.top + padding
for key in keys:
extents = cx.text_extents(key)
drawKey(key, x, y, extents[3])
y += max(extents[3], bullet) + padding
cx.restore()
def _renderLegend(self, cx):
"""This function adds a legend to the chart"""
if self.options.legend.hide:
return
surface_width, surface_height = self.getSurfaceSize()
# Compute legend dimensions
padding = 4
bullet = 15
width = 0
height = padding
keys = self._getDatasetsKeys()
cx.select_font_face(self.options.legend.legendFont,
cairo.FONT_SLANT_NORMAL,
cairo.FONT_WEIGHT_NORMAL)
cx.set_font_size(self.options.legend.legendFontSize)
for key in keys:
key = safe_unicode(key, self.options.encoding)
extents = cx.text_extents(key)
width = max(extents[2], width)
height += max(extents[3], bullet) + padding
width = padding + bullet + padding + width + padding
# Compute legend position
legend = self.options.legend
if legend.position.right is not None:
legend.position.left = (surface_width
- legend.position.right
- width)
if legend.position.bottom is not None:
legend.position.top = (surface_height
- legend.position.bottom
- height)
# Draw the legend
cx.save()
cx.rectangle(self.options.legend.position.left,
self.options.legend.position.top,
width, height)
cx.set_source_rgba(1, 1, 1, self.options.legend.opacity)
cx.fill_preserve()
cx.set_line_width(self.options.legend.borderWidth)
cx.set_source_rgb(*hex2rgb(self.options.legend.borderColor))
cx.stroke()
def drawKey(key, x, y, text_height):
cx.rectangle(x, y, bullet, bullet)
cx.set_source_rgb(*self.colorScheme[key])
cx.fill_preserve()
cx.set_source_rgb(0, 0, 0)
cx.stroke()
cx.move_to(x + bullet + padding,
y + bullet / 2.0 + text_height / 2.0)
cx.show_text(key)
cx.set_line_width(1)
x = self.options.legend.position.left + padding
y = self.options.legend.position.top + padding
for key in keys:
extents = cx.text_extents(key)
drawKey(key, x, y, extents[3])
y += max(extents[3], bullet) + padding
cx.restore()
