--- /dev/null
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# CairoPlot.py
+#
+# Copyright (c) 2008 Rodrigo Moreira Araújo
+#
+# Author: Rodrigo Moreiro Araujo <alf.rodrigo@gmail.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public License
+# as published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+# USA
+
+#Contributor: João S. O. Bueno
+
+__version__ = 1.1
+
+import cairo
+import math
+import random
+
+HORZ = 0
+VERT = 1
+
+def other_direction(direction):
+ "explicit is better than implicit"
+ if direction == HORZ:
+ return VERT
+ else:
+ return HORZ
+
+class Plot(object):
+ def __init__(self,
+ surface=None,
+ data=None,
+ width=640,
+ height=480,
+ background=None,
+ border = 0,
+ h_labels = None,
+ v_labels = None,
+ series_colors = None):
+ self.create_surface(surface, width, height)
+ self.width = width
+ self.height = height
+ self.context = cairo.Context(self.surface)
+ self.load_series(data, h_labels, v_labels, series_colors)
+
+ self.labels={}
+ self.labels[HORZ] = h_labels
+ self.labels[VERT] = v_labels
+
+ self.font_size = 10
+
+ self.set_background (background)
+ self.border = border
+ self.borders = {}
+
+ self.line_color = (0.5, 0.5, 0.5)
+ self.line_width = 0.5
+ self.label_color = (0.0, 0.0, 0.0)
+ self.grid_color = (0.8, 0.8, 0.8)
+
+
+ def create_surface(self, surface, width=None, height=None):
+ self.filename = None
+ if isinstance(surface, cairo.Surface):
+ self.surface = surface
+ return
+ if not type(surface) in (str, unicode):
+ raise TypeError("Surface should be either a Cairo surface or a filename, not %s" % surface)
+ sufix = surface.rsplit(".")[-1].lower()
+ self.filename = surface
+ if sufix == "png":
+ self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
+ elif sufix == "ps":
+ self.surface = cairo.PSSurface(surface, width, height)
+ elif sufix == "pdf":
+ self.surface = cairo.PSSurface(surface, width, height)
+ else:
+ if sufix != "svg":
+ self.filename += ".svg"
+ self.surface = cairo.SVGSurface(self.filename, width, height)
+
+ #def __del__(self):
+ # self.commit()
+
+ def commit(self):
+ try:
+ self.context.show_page()
+ if self.filename.endswith(".png"):
+ self.surface.write_to_png(self.filename)
+ else:
+ self.surface.finish()
+ except cairo.Error:
+ pass
+
+ def load_series (self, data, h_labels=None, v_labels=None, series_colors=None):
+ #FIXME: implement Series class for holding series data,
+ # labels and presentation properties
+
+ #data can be a list, a list of lists or a dictionary with
+ #each item as a labeled data series.
+ #we should (for teh time being) create a list of lists
+ #and set labels for teh series rom teh values provided.
+
+ self.series_labels = []
+ self.data = []
+ #if we have labeled series:
+ if hasattr(data, "keys"):
+ #dictionary:
+ self.series_labels = data.keys()
+ for key in self.series_labels:
+ self.data.append(data[key])
+ #if we have a series of series:
+ #changed the following line to adapt the Plot class to work
+ #with GanttChart class
+ #elif hasattr(data[0], "__getitem__"):
+ elif max([hasattr(item,'__delitem__') for item in data]) :
+ self.data = data
+ self.series_labels = range(len(data))
+ else:
+ self.data = [data]
+ self.series_labels = None
+ #FIXME: select some pre-sets and allow these to be parametrized:
+ random.seed(3)
+ self.series_colors = series_colors
+ if not self.series_colors:
+ self.series_colors = [[random.random() for i in range(3)] for series in self.data]
+ self.series_widths = [1.0 for series in self.data]
+
+ def get_width(self):
+ return self.surface.get_width()
+ def get_height(self):
+ return self.surface.get_height()
+
+ def set_background(self, background):
+ if background is None:
+ self.background = cairo.LinearGradient(self.width / 2, 0, self.width / 2, self.height)
+ self.background.add_color_stop_rgb(0,1.0,1.0,1.0)
+ self.background.add_color_stop_rgb(1.0,0.9,0.9,0.9)
+ else:
+ if type(background) in (cairo.LinearGradient, tuple):
+ self.background = background
+ else:
+ raise TypeError ("Background should be either cairo.LinearGradient or a 3-tuple, not %s" % type(background))
+
+ def render_background(self):
+ if isinstance (self.background, cairo.LinearGradient):
+ self.context.set_source(self.background)
+ else:
+ self.context.set_source_rgb(*self.background)
+ self.context.rectangle(0,0, self.width, self.height)
+ self.context.fill()
+
+ def render_bounding_box(self):
+ self.context.set_source_rgb(*self.line_color)
+ self.context.set_line_width(self.line_width)
+ self.context.rectangle(self.border, self.border,
+ self.width - 2 * self.border,
+ self.height - 2 * self.border)
+ #CORRECTION: Added the next line so it will draw the outline of the bounding box
+ self.context.stroke()
+
+ def render(self):
+ pass
+
+class DotLinePlot(Plot):
+ def __init__(self,
+ surface=None,
+ data=None,
+ width=640,
+ height=480,
+ background=None,
+ border=0,
+ axis = False,
+ grid = False,
+ dots = False,
+ h_labels = None,
+ v_labels = None,
+ h_bounds = None,
+ v_bounds = None):
+
+ self.bounds = {}
+ self.bounds[HORZ] = h_bounds
+ self.bounds[VERT] = v_bounds
+
+ Plot.__init__(self, surface, data, width, height, background, border, h_labels, v_labels)
+ self.axis = axis
+ self.grid = grid
+ self.dots = dots
+
+ self.max_value = {}
+
+ self.h_label_angle = math.pi / 2.5
+
+ def load_series(self, data, h_labels = None, v_labels = None, series_colors=None):
+ Plot.load_series(self, data, h_labels, v_labels, series_colors)
+ self.calc_boundaries()
+
+ def calc_boundaries(self):
+ if not self.bounds[HORZ]:
+ self.bounds[HORZ] = (0, max([len(series) for series in (self.data)]))
+
+ if not self.bounds[VERT]:
+ max_data_value = min_data_value = 0
+ for series in self.data:
+ if max(series) > max_data_value:
+ max_data_value = max(series)
+ if min(series) < min_data_value:
+ min_data_value = min(series)
+ self.bounds[VERT] = (min_data_value, max_data_value)
+
+ def calc_extents(self, direction):
+ self.max_value[direction] = 0
+ if self.labels[direction]:
+ widest_word = max(self.labels[direction], key = lambda item: self.context.text_extents(item)[2])
+ self.max_value[direction] = self.context.text_extents(widest_word)[2]
+ self.borders[other_direction(direction)] = self.max_value[direction] + self.border
+ else:
+ self.max_value[direction] = self.context.text_extents(str(self.bounds[direction][1]))[2]
+ self.borders[other_direction(direction)] = self.max_value[direction] + self.border + 20
+
+ def calc_horz_extents(self):
+ self.calc_extents(HORZ)
+
+ def calc_vert_extents(self):
+ self.calc_extents(VERT)
+
+ def render_axis(self):
+ cr = self.context
+ h_border = self.borders[HORZ]
+ v_border = self.borders[VERT]
+ cr.set_source_rgb(*self.line_color)
+
+ cr.move_to(h_border, self.height - v_border)
+ cr.line_to(h_border, v_border)
+ cr.stroke()
+
+ cr.move_to(h_border, self.height - v_border)
+ cr.line_to(self.width - h_border, self.height - v_border)
+ cr.stroke()
+
+ def render_labels(self):
+ self.context.set_font_size(self.font_size * 0.8)
+
+ self.render_horz_labels()
+ self.render_vert_labels()
+
+ def render_horz_labels(self):
+ cr = self.context
+ labels = self.labels[HORZ]
+ if not labels:
+ labels = [str(i) for i in range(self.bounds[HORZ][0], self.bounds[HORZ][1])]
+ border = self.borders[HORZ]
+
+ step = (self.width - 2 * border) / len(labels)
+ x = border
+ for item in labels:
+ cr.set_source_rgb(*self.label_color)
+ width = cr.text_extents(item)[2]
+ cr.move_to(x, self.height - self.borders[VERT] + 10)
+ cr.rotate(self.h_label_angle)
+ cr.show_text(item)
+ cr.rotate(-self.h_label_angle)
+ #FIXME: render grid in a separate method
+ if self.grid and x != border:
+ cr.set_source_rgb(*self.grid_color)
+ cr.move_to(x, self.height - self.borders[VERT])
+ cr.line_to(x, self.borders[VERT])
+ cr.stroke()
+ x += step
+
+ def render_vert_labels(self):
+ cr = self.context
+ labels = self.labels[VERT]
+ if not labels:
+ amplitude = self.bounds[VERT][1] - self.bounds[VERT][0]
+ #if vertical labels need floating points
+ if amplitude % 10:
+ #label_type = lambda x : float(x)
+ labels = ["%.2lf" % (float(self.bounds[VERT][0] + (amplitude * i / 10.0))) for i in range(10) ]
+ else:
+ #label_type = lambda x: int(x)
+ labels = [str(int(self.bounds[VERT][0] + (amplitude * i / 10.0))) for i in range(10) ]
+ #labels = [str(label_type(self.bounds[VERT][0] + (amplitude * i / 10.0))) for i in range(10) ]
+ border = self.borders[VERT]
+
+ step = (self.height - 2 * border)/ len(labels)
+ y = self.height - border
+ for item in labels:
+ cr.set_source_rgb(*self.label_color)
+ width = cr.text_extents(item)[2]
+ cr.move_to(self.borders[HORZ] - width - 5,y)
+ cr.show_text(item)
+ #FIXME: render grid in a separate method
+ if self.grid and y != self.height - border:
+ cr.set_source_rgb(*self.grid_color)
+ cr.move_to(self.borders[HORZ], y)
+ cr.line_to(self.width - self.borders[HORZ], y)
+ cr.stroke()
+ y -=step
+
+
+ def render(self):
+ self.calc_horz_extents()
+ self.calc_vert_extents()
+
+ self.render_background()
+ self.render_bounding_box()
+
+ if self.axis:
+ self.render_axis()
+
+ self.render_labels()
+
+ self.render_plot()
+
+ def render_series_labels(self):
+ #FIXME: implement this
+ for key in self.series_labels:
+ pass
+ #This was not working in Rodrigo's original code anyway
+
+ def render_plot(self):
+ #render_series_labels
+ largest_series_length = len(max(self.data, key=len))
+ #FIXME: plot_width and plot_height should be object properties and be re-used.
+ plot_width = self.width - 2* self.borders[HORZ]
+ plot_height = self.height - 2 * self.borders[VERT]
+ plot_top = self.height - self.borders[VERT]
+
+ series_amplitude = self.bounds[VERT][1] - self.bounds[VERT][0]
+
+ horizontal_step = float (plot_width) / largest_series_length
+ vertical_step = float (plot_height) / series_amplitude
+ last = None
+ cr = self.context
+ for number, series in enumerate (self.data):
+ cr.set_source_rgb(*self.series_colors[number])
+ x = self.borders[HORZ]
+ last = None
+ #FIXME: separate plotting of lines, dots and area
+
+ for value in series:
+ if last != None:
+ cr.move_to(x - horizontal_step, plot_top - int((last - self.bounds[VERT][0]) * vertical_step))
+ cr.line_to(x, plot_top - int((value - self.bounds[VERT][0])* vertical_step))
+ cr.set_line_width(self.series_widths[number])
+ cr.stroke()
+ if self.dots:
+ cr.new_path()
+ cr.arc(x, plot_top - int((value - self.bounds[VERT][0]) * vertical_step), 3, 0, 2.1 * math.pi)
+ cr.close_path()
+ cr.fill()
+ x += horizontal_step
+ last = value
+
+class FunctionPlot(DotLinePlot):
+ def __init__(self,
+ surface=None,
+ data=None,
+ width=640,
+ height=480,
+ background=None,
+ border=0,
+ axis = False,
+ grid = False,
+ dots = False,
+ h_labels = None,
+ v_labels = None,
+ h_bounds = None,
+ v_bounds = None,
+ step = 1,
+ discrete = False):
+
+ self.function = data
+ self.step = step
+ self.discrete = discrete
+ data = []
+ if h_bounds:
+ i = h_bounds[0]
+ while i < h_bounds[1]:
+ data.append(self.function(i))
+ i += self.step
+ else:
+ i = 0
+ while i < 10:
+ data.append(self.function(i))
+ i += self.step
+
+ DotLinePlot.__init__(self, surface, data, width, height, background, border,
+ axis, grid, dots, h_labels, v_labels, h_bounds, v_bounds)
+
+ def render_horz_labels(self):
+ cr = self.context
+ labels = self.labels[HORZ]
+ if not labels:
+ labels = []
+ i = self.bounds[HORZ][0]
+ while i<self.bounds[HORZ][1]:
+ labels.append(str(i*self.step))
+ i += (self.bounds[HORZ][1] - self.bounds[HORZ][0])/10
+ #labels = [str(i*self.step) for i in range(self.bounds[HORZ][0], self.bounds[HORZ][1])]
+ border = self.borders[HORZ]
+
+ step = (self.width - 2 * border) / len(labels)
+ x = border
+ for item in labels:
+ cr.set_source_rgb(*self.label_color)
+ width = cr.text_extents(item)[2]
+ cr.move_to(x, self.height - self.borders[VERT] + 10)
+ cr.rotate(self.h_label_angle)
+ cr.show_text(item)
+ cr.rotate(-self.h_label_angle)
+ #FIXME: render grid in a separate method
+ if self.grid and x != border:
+ cr.set_source_rgb(*self.grid_color)
+ cr.move_to(x, self.height - self.borders[VERT])
+ cr.line_to(x, self.borders[VERT])
+ cr.stroke()
+ x += step
+
+ def render_plot(self):
+ if not self.discrete:
+ DotLinePlot.render_plot(self)
+ else:
+ #render_series_labels
+ largest_series_length = len(max(self.data, key=len))
+ #FIXME: plot_width and plot_height should be object properties and be re-used.
+ plot_width = self.width - 2* self.borders[HORZ]
+ plot_height = self.height - 2 * self.borders[VERT]
+ plot_top = self.height - self.borders[VERT]
+
+ series_amplitude = self.bounds[VERT][1] - self.bounds[VERT][0]
+
+ horizontal_step = float (plot_width) / largest_series_length
+ vertical_step = float (plot_height) / series_amplitude
+ last = None
+ cr = self.context
+ for number, series in enumerate (self.data):
+ cr.set_source_rgb(*self.series_colors[number])
+ x = self.borders[HORZ]
+ for value in series:
+ cr.move_to(x, plot_top - int((value - self.bounds[VERT][0]) * vertical_step))
+ cr.line_to(x, plot_top)
+ cr.set_line_width(self.series_widths[number])
+ cr.stroke()
+ if self.dots:
+ cr.new_path()
+ cr.arc(x, plot_top - int((value - self.bounds[VERT][0]) * vertical_step), 3, 0, 2.1 * math.pi)
+ cr.close_path()
+ cr.fill()
+ x += horizontal_step
+
+
+
+
+class BarPlot(Plot):
+ def __init__(self,
+ surface = None,
+ data = None,
+ width = 640,
+ height = 480,
+ background = None,
+ border = 0,
+ grid = False,
+ rounded_corners = False,
+ three_dimension = False,
+ h_labels = None,
+ v_labels = None,
+ h_bounds = None,
+ v_bounds = None,
+ series_colors = None):
+
+ self.bounds = {}
+ self.bounds[HORZ] = h_bounds
+ self.bounds[VERT] = v_bounds
+
+ Plot.__init__(self, surface, data, width, height, background, border, h_labels, v_labels, series_colors)
+ self.grid = grid
+ self.rounded_corners = rounded_corners
+ self.three_dimension = three_dimension
+
+ self.max_value = {}
+
+ def load_series(self, data, h_labels = None, v_labels = None, series_colors = None):
+ Plot.load_series(self, data, h_labels, v_labels, series_colors)
+ if not series_colors:
+ if hasattr( max(self.data, key = len), '__getitem__'):
+ self.series_colors = [[random.random() for i in range(3)] for item in max(self.data, key = len)]
+ else:
+ self.series_colors = [[random.random() for i in range(3)] for series in self.data]
+ self.calc_boundaries()
+
+ def calc_boundaries(self):
+
+ if not self.bounds[HORZ]:
+ self.bounds[HORZ] = (0, len(self.data))
+
+ if not self.bounds[VERT]:
+ max_data_value = min_data_value = 0
+ for series in self.data:
+ if max(series) > max_data_value:
+ max_data_value = max(series)
+ if min(series) < min_data_value:
+ min_data_value = min(series)
+ self.bounds[VERT] = (min_data_value, max_data_value)
+
+ def calc_extents(self, direction):
+ self.max_value[direction] = 0
+ if self.labels[direction]:
+ widest_word = max(self.labels[direction], key = lambda item: self.context.text_extents(item)[2])
+ self.max_value[direction] = self.context.text_extents(widest_word)[3 - direction]
+ self.borders[other_direction(direction)] = (2-direction)*self.max_value[direction] + self.border + direction*(5)
+ else:
+ self.borders[other_direction(direction)] = self.border
+
+ def calc_horz_extents(self):
+ self.calc_extents(HORZ)
+
+ def calc_vert_extents(self):
+ self.calc_extents(VERT)
+ if self.labels[VERT] and not self.labels[HORZ]:
+ self.borders[VERT] += 10
+
+ def render(self):
+ self.calc_horz_extents()
+ self.calc_vert_extents()
+
+ self.render_background()
+ self.render_bounding_box()
+
+ if self.grid:
+ self.render_grid()
+ if self.three_dimension:
+ self.render_ground()
+
+ self.render_labels()
+
+ self.render_plot()
+
+ def draw_3d_rectangle_front(self, x0, y0, x1, y1, shift):
+ self.context.rectangle(x0-shift, y0+shift, x1-x0, y1-y0)
+ def draw_3d_rectangle_side(self, x0, y0, x1, y1, shift):
+ self.context.move_to(x1-shift,y0+shift)
+ self.context.line_to(x1, y0)
+ self.context.line_to(x1, y1)
+ self.context.line_to(x1-shift, y1+shift)
+ self.context.line_to(x1-shift, y0+shift)
+ self.context.close_path()
+ def draw_3d_rectangle_top(self, x0, y0, x1, y1, shift):
+ self.context.move_to(x0-shift,y0+shift)
+ self.context.line_to(x0, y0)
+ self.context.line_to(x1, y0)
+ self.context.line_to(x1-shift, y0+shift)
+ self.context.line_to(x0-shift, y0+shift)
+ self.context.close_path()
+
+ def render_grid(self):
+ self.context.set_source_rgb(0.8, 0.8, 0.8)
+ if self.labels[VERT]:
+ lines = len(self.labels[VERT])
+ else:
+ lines = 10
+ vertical_step = float(self.height - 2*self.borders[VERT])/(lines-1)
+ y = self.borders[VERT]
+ for x in xrange(0, lines):
+ self.context.move_to(self.borders[HORZ], y)
+ self.context.line_to(self.width - self.border, y)
+ self.context.stroke()
+ y += vertical_step
+
+ def render_ground(self):
+ self.draw_3d_rectangle_front(self.borders[HORZ], self.height - self.borders[VERT],
+ self.width - self.borders[HORZ], self.height - self.borders[VERT] + 5, 10)
+ self.context.fill()
+
+ self.draw_3d_rectangle_side (self.borders[HORZ], self.height - self.borders[VERT],
+ self.width - self.borders[HORZ], self.height - self.borders[VERT] + 5, 10)
+ self.context.fill()
+
+ self.draw_3d_rectangle_top (self.borders[HORZ], self.height - self.borders[VERT],
+ self.width - self.borders[HORZ], self.height - self.borders[VERT] + 5, 10)
+ self.context.fill()
+
+ def render_labels(self):
+ self.context.set_font_size(self.font_size * 0.8)
+
+ if self.labels[HORZ]:
+ self.render_horz_labels()
+ if self.labels[VERT]:
+ self.render_vert_labels()
+
+ def render_labels(self):
+ self.context.set_font_size(self.font_size * 0.8)
+
+ if self.labels[HORZ]:
+ self.render_horz_labels()
+ if self.labels[VERT]:
+ self.render_vert_labels()
+
+ def render_horz_labels(self):
+ step = (self.width - self.borders[HORZ] - self.border)/len(self.labels[HORZ])
+ x = self.borders[HORZ] + step/2
+
+ for item in self.labels[HORZ]:
+ self.context.set_source_rgb(*self.label_color)
+ width = self.context.text_extents(item)[2]
+ self.context.move_to(x - width/2, self.height - self.borders[VERT] + self.max_value[HORZ] + 3)
+ self.context.show_text(item)
+ x += step
+
+ def render_vert_labels(self):
+ y = self.borders[VERT]
+ step = (self.height - 2*self.borders[VERT])/(len(self.labels[VERT]) - 1)
+
+ self.labels[VERT].reverse()
+ for item in self.labels[VERT]:
+ self.context.set_source_rgb(*self.label_color)
+ width, height = self.context.text_extents(item)[2:4]
+ self.context.move_to(self.borders[HORZ] - width - 5, y + height/2)
+ self.context.show_text(item)
+ y += step
+ self.labels[VERT].reverse()
+
+ def draw_rectangle(self, x0, y0, x1, y1):
+ self.context.arc(x0+5, y0+5, 5, -math.pi, -math.pi/2)
+ self.context.line_to(x1-5, y0)
+ self.context.arc(x1-5, y0+5, 5, -math.pi/2, 0)
+ self.context.line_to(x1, y1-5)
+ self.context.arc(x1-5, y1-5, 5, 0, math.pi/2)
+ self.context.line_to(x0+5, y1)
+ self.context.arc(x0+5, y1-5, 5, math.pi/2, math.pi)
+ self.context.line_to(x0, y0+5)
+ self.context.close_path()
+
+ def render_plot(self):
+ plot_width = self.width - self.borders[HORZ] - self.border
+ plot_height = self.height - 2 * self.borders[VERT]
+ plot_top = self.height - self.borders[VERT]
+
+ series_amplitude = self.bounds[VERT][1] - self.bounds[VERT][0]
+
+ y0 = self.borders[VERT]
+
+ horizontal_step = float (plot_width) / len(self.data)
+ vertical_step = float (plot_height) / series_amplitude
+
+ for i,series in enumerate(self.data):
+ inner_step = horizontal_step/(len(series) + 0.4)
+ x0 = self.borders[HORZ] + i*horizontal_step + 0.2*inner_step
+ for number,key in enumerate(series):
+ linear = cairo.LinearGradient( x0, key*vertical_step/2, x0 + inner_step, key*vertical_step/2 )
+ r,g,b = self.series_colors[number]
+ linear.add_color_stop_rgb(0.0, 3.5*r/5.0, 3.5*g/5.0, 3.5*b/5.0)
+ linear.add_color_stop_rgb(1.0, r, g, b)
+ self.context.set_source(linear)
+
+ if self.rounded_corners and key != 0:
+ self.draw_rectangle(x0, y0 + (series_amplitude - key)*vertical_step, x0+inner_step, y0 + series_amplitude*vertical_step)
+ self.context.fill()
+ elif self.three_dimension:
+ self.draw_3d_rectangle_front(x0, y0 + (series_amplitude - key)*vertical_step, x0+inner_step, y0 + series_amplitude*vertical_step, 5)
+ self.context.fill()
+ self.draw_3d_rectangle_side(x0, y0 + (series_amplitude - key)*vertical_step, x0+inner_step, y0 + series_amplitude*vertical_step, 5)
+ self.context.fill()
+ self.draw_3d_rectangle_top(x0, y0 + (series_amplitude - key)*vertical_step, x0+inner_step, y0 + series_amplitude*vertical_step, 5)
+ self.context.fill()
+ else:
+ self.context.rectangle(x0, y0 + (series_amplitude - key)*vertical_step, inner_step, key*vertical_step)
+ self.context.fill()
+
+ x0 += inner_step
+
+class PiePlot(Plot):
+ def __init__ (self,
+ surface=None,
+ data=None,
+ width=640,
+ height=480,
+ background=None,
+ gradient=False,
+ shadow=False,
+ series_colors=None):
+
+ Plot.__init__(self, surface, data, width, height, background, series_colors = series_colors)
+ self.center = (self.width/2, self.height/2)
+ self.total = sum(self.data)
+ self.radius = min(self.width/3,self.height/3)
+ self.gradient = gradient
+ self.shadow = shadow
+
+ def load_series(self, data, h_labels=None, v_labels=None, series_colors=None):
+ Plot.load_series(self, data, series_colors = series_colors)
+
+ def draw_piece(self, angle, next_angle):
+ self.context.move_to(self.center[0],self.center[1])
+ self.context.line_to(self.center[0] + self.radius*math.cos(angle), self.center[1] + self.radius*math.sin(angle))
+ self.context.arc(self.center[0], self.center[1], self.radius, angle, next_angle)
+ self.context.line_to(self.center[0], self.center[1])
+ self.context.close_path()
+
+ def render(self):
+ self.render_background()
+ self.render_bounding_box()
+ if self.shadow:
+ self.render_shadow()
+ self.render_plot()
+ self.render_series_labels()
+
+ def render_shadow(self):
+ horizontal_shift = 3
+ vertical_shift = 3
+ self.context.set_source_rgba(0, 0, 0, 0.5)
+ self.context.arc(self.center[0] + horizontal_shift, self.center[1] + vertical_shift, self.radius, 0, 2*math.pi)
+ self.context.fill()
+
+ def render_series_labels(self):
+ angle = 0
+ next_angle = 0
+ x0,y0 = self.center
+ cr = self.context
+ for number,key in enumerate(self.series_labels):
+ next_angle = angle + 2.0*math.pi*self.data[number]/self.total
+ cr.set_source_rgb(*self.series_colors[number])
+ w = cr.text_extents(key)[2]
+ if (angle + next_angle)/2 < math.pi/2 or (angle + next_angle)/2 > 3*math.pi/2:
+ cr.move_to(x0 + (self.radius+10)*math.cos((angle+next_angle)/2), y0 + (self.radius+10)*math.sin((angle+next_angle)/2) )
+ else:
+ cr.move_to(x0 + (self.radius+10)*math.cos((angle+next_angle)/2) - w, y0 + (self.radius+10)*math.sin((angle+next_angle)/2) )
+ cr.show_text(key)
+ angle = next_angle
+
+ def render_plot(self):
+ angle = 0
+ next_angle = 0
+ x0,y0 = self.center
+ cr = self.context
+ for number,series in enumerate(self.data):
+ next_angle = angle + 2.0*math.pi*series/self.total
+ if self.gradient:
+ gradient_color = cairo.RadialGradient(self.center[0], self.center[1], 0, self.center[0], self.center[1], self.radius)
+ gradient_color.add_color_stop_rgb(0.3, self.series_colors[number][0],
+ self.series_colors[number][1],
+ self.series_colors[number][2])
+ gradient_color.add_color_stop_rgb(1, self.series_colors[number][0]*0.7,
+ self.series_colors[number][1]*0.7,
+ self.series_colors[number][2]*0.7)
+ cr.set_source(gradient_color)
+ else:
+ cr.set_source_rgb(*self.series_colors[number])
+
+ self.draw_piece(angle, next_angle)
+ cr.fill()
+
+ cr.set_source_rgb(1.0, 1.0, 1.0)
+ self.draw_piece(angle, next_angle)
+ cr.stroke()
+
+ angle = next_angle
+
+class DonutPlot(PiePlot):
+ def __init__ (self,
+ surface=None,
+ data=None,
+ width=640,
+ height=480,
+ background=None,
+ gradient=False,
+ shadow=False,
+ series_colors=None,
+ inner_radius=-1):
+
+ Plot.__init__(self, surface, data, width, height, background, series_colors = series_colors)
+ self.center = (self.width/2, self.height/2)
+ self.total = sum(self.data)
+ self.radius = min(self.width/3,self.height/3)
+ self.inner_radius = inner_radius*self.radius
+ if inner_radius == -1:
+ self.inner_radius = self.radius/3
+ self.gradient = gradient
+ self.shadow = shadow
+
+ def draw_piece(self, angle, next_angle):
+ self.context.move_to(self.center[0] + (self.inner_radius)*math.cos(angle), self.center[1] + (self.inner_radius)*math.sin(angle))
+ self.context.line_to(self.center[0] + self.radius*math.cos(angle), self.center[1] + self.radius*math.sin(angle))
+ self.context.arc(self.center[0], self.center[1], self.radius, angle, next_angle)
+ self.context.line_to(self.center[0] + (self.inner_radius)*math.cos(next_angle), self.center[1] + (self.inner_radius)*math.sin(next_angle))
+ self.context.arc_negative(self.center[0], self.center[1], self.inner_radius, next_angle, angle)
+ self.context.close_path()
+
+ def render_shadow(self):
+ horizontal_shift = 3
+ vertical_shift = 3
+ self.context.set_source_rgba(0, 0, 0, 0.5)
+ self.context.arc(self.center[0] + horizontal_shift, self.center[1] + vertical_shift, self.inner_radius, 0, 2*math.pi)
+ self.context.arc_negative(self.center[0] + horizontal_shift, self.center[1] + vertical_shift, self.radius, 0, -2*math.pi)
+ self.context.fill()
+
+class GanttChart (Plot) :
+ def __init__(self,
+ surface = None,
+ data = None,
+ width = 640,
+ height = 480,
+ h_labels = None,
+ v_labels = None,
+ colors = None):
+ self.bounds = {}
+ self.max_value = {}
+ Plot.__init__(self, surface, data, width, height, h_labels = h_labels, v_labels = v_labels, series_colors = colors)
+
+ def load_series(self, data, h_labels=None, v_labels=None, series_colors=None):
+ Plot.load_series(self, data, h_labels, v_labels, series_colors)
+ self.calc_boundaries()
+
+ def calc_boundaries(self):
+ self.bounds[HORZ] = (0,len(self.data))
+ for item in self.data:
+ if hasattr(item, "__delitem__"):
+ for sub_item in item:
+ end_pos = max(sub_item)
+ else:
+ end_pos = max(item)
+ self.bounds[VERT] = (0,end_pos)
+
+ def calc_extents(self, direction):
+ self.max_value[direction] = 0
+ if self.labels[direction]:
+ widest_word = max(self.labels[direction], key = lambda item: self.context.text_extents(item)[2])
+ self.max_value[direction] = self.context.text_extents(widest_word)[2]
+ else:
+ self.max_value[direction] = self.context.text_extents( str(self.bounds[direction][1] + 1) )[2]
+
+ def calc_horz_extents(self):
+ self.calc_extents(HORZ)
+ self.borders[HORZ] = 100 + self.max_value[HORZ]
+
+ def calc_vert_extents(self):
+ self.calc_extents(VERT)
+ self.borders[VERT] = self.height/(self.bounds[HORZ][1] + 1)
+
+ def calc_steps(self):
+ self.horizontal_step = (self.width - self.borders[HORZ])/(len(self.labels[VERT]))
+ self.vertical_step = self.borders[VERT]
+
+ def render(self):
+ self.calc_horz_extents()
+ self.calc_vert_extents()
+ self.calc_steps()
+ self.render_background()
+
+ self.render_labels()
+ self.render_grid()
+ self.render_plot()
+
+ def render_background(self):
+ cr = self.context
+ cr.set_source_rgb(255,255,255)
+ cr.rectangle(0,0,self.width, self.height)
+ cr.fill()
+ for number,item in enumerate(self.data):
+ linear = cairo.LinearGradient(self.width/2, self.borders[VERT] + number*self.vertical_step,
+ self.width/2, self.borders[VERT] + (number+1)*self.vertical_step)
+ linear.add_color_stop_rgb(0,1.0,1.0,1.0)
+ linear.add_color_stop_rgb(1.0,0.9,0.9,0.9)
+ cr.set_source(linear)
+ cr.rectangle(0,self.borders[VERT] + number*self.vertical_step,self.width,self.vertical_step)
+ cr.fill()
+
+ def render_grid(self):
+ cr = self.context
+ cr.set_source_rgb(0.7, 0.7, 0.7)
+ cr.set_dash((1,0,0,0,0,0,1))
+ cr.set_line_width(0.5)
+ for number,label in enumerate(self.labels[VERT]):
+ h = cr.text_extents(label)[3]
+ cr.move_to(self.borders[HORZ] + number*self.horizontal_step, self.vertical_step/2 + h)
+ cr.line_to(self.borders[HORZ] + number*self.horizontal_step, self.height)
+ cr.stroke()
+
+ def render_labels(self):
+ self.context.set_font_size(0.02 * self.width)
+
+ self.render_horz_labels()
+ self.render_vert_labels()
+
+ def render_horz_labels(self):
+ cr = self.context
+ labels = self.labels[HORZ]
+ if not labels:
+ labels = [str(i) for i in range(1, self.bounds[HORZ][1] + 1) ]
+ for number,label in enumerate(labels):
+ if label != None:
+ cr.set_source_rgb(0.5, 0.5, 0.5)
+ w,h = cr.text_extents(label)[2], cr.text_extents(label)[3]
+ cr.move_to(40,self.borders[VERT] + number*self.vertical_step + self.vertical_step/2 + h/2)
+ cr.show_text(label)
+
+ def render_vert_labels(self):
+ cr = self.context
+ labels = self.labels[VERT]
+ if not labels:
+ labels = [str(i) for i in range(1, self.bounds[VERT][1] + 1) ]
+ for number,label in enumerate(labels):
+ w,h = cr.text_extents(label)[2], cr.text_extents(label)[3]
+ cr.move_to(self.borders[HORZ] + number*self.horizontal_step - w/2, self.vertical_step/2)
+ cr.show_text(label)
+
+ def render_rectangle(self, x0, y0, x1, y1, color):
+ self.draw_shadow(x0, y0, x1, y1)
+ self.draw_rectangle(x0, y0, x1, y1, color)
+
+ def draw_rectangular_shadow(self, gradient, x0, y0, w, h):
+ self.context.set_source(gradient)
+ self.context.rectangle(x0,y0,w,h)
+ self.context.fill()
+
+ def draw_circular_shadow(self, x, y, radius, ang_start, ang_end, mult, shadow):
+ gradient = cairo.RadialGradient(x, y, 0, x, y, 2*radius)
+ gradient.add_color_stop_rgba(0, 0, 0, 0, shadow)
+ gradient.add_color_stop_rgba(1, 0, 0, 0, 0)
+ self.context.set_source(gradient)
+ self.context.move_to(x,y)
+ self.context.line_to(x + mult[0]*radius,y + mult[1]*radius)
+ self.context.arc(x, y, 8, ang_start, ang_end)
+ self.context.line_to(x,y)
+ self.context.close_path()
+ self.context.fill()
+
+ def draw_rectangle(self, x0, y0, x1, y1, color):
+ cr = self.context
+ middle = (x0+x1)/2
+ linear = cairo.LinearGradient(middle,y0,middle,y1)
+ linear.add_color_stop_rgb(0,3.5*color[0]/5.0, 3.5*color[1]/5.0, 3.5*color[2]/5.0)
+ linear.add_color_stop_rgb(1,color[0],color[1],color[2])
+ cr.set_source(linear)
+
+ cr.arc(x0+5, y0+5, 5, 0, 2*math.pi)
+ cr.arc(x1-5, y0+5, 5, 0, 2*math.pi)
+ cr.arc(x0+5, y1-5, 5, 0, 2*math.pi)
+ cr.arc(x1-5, y1-5, 5, 0, 2*math.pi)
+ cr.rectangle(x0+5,y0,x1-x0-10,y1-y0)
+ cr.rectangle(x0,y0+5,x1-x0,y1-y0-10)
+ cr.fill()
+
+ def draw_shadow(self, x0, y0, x1, y1):
+ shadow = 0.4
+ h_mid = (x0+x1)/2
+ v_mid = (y0+y1)/2
+ h_linear_1 = cairo.LinearGradient(h_mid,y0-4,h_mid,y0+4)
+ h_linear_2 = cairo.LinearGradient(h_mid,y1-4,h_mid,y1+4)
+ v_linear_1 = cairo.LinearGradient(x0-4,v_mid,x0+4,v_mid)
+ v_linear_2 = cairo.LinearGradient(x1-4,v_mid,x1+4,v_mid)
+
+ h_linear_1.add_color_stop_rgba( 0, 0, 0, 0, 0)
+ h_linear_1.add_color_stop_rgba( 1, 0, 0, 0, shadow)
+ h_linear_2.add_color_stop_rgba( 0, 0, 0, 0, shadow)
+ h_linear_2.add_color_stop_rgba( 1, 0, 0, 0, 0)
+ v_linear_1.add_color_stop_rgba( 0, 0, 0, 0, 0)
+ v_linear_1.add_color_stop_rgba( 1, 0, 0, 0, shadow)
+ v_linear_2.add_color_stop_rgba( 0, 0, 0, 0, shadow)
+ v_linear_2.add_color_stop_rgba( 1, 0, 0, 0, 0)
+
+ self.draw_rectangular_shadow(h_linear_1,x0+4,y0-4,x1-x0-8,8)
+ self.draw_rectangular_shadow(h_linear_2,x0+4,y1-4,x1-x0-8,8)
+ self.draw_rectangular_shadow(v_linear_1,x0-4,y0+4,8,y1-y0-8)
+ self.draw_rectangular_shadow(v_linear_2,x1-4,y0+4,8,y1-y0-8)
+
+ self.draw_circular_shadow(x0+4, y0+4, 4, math.pi, 3*math.pi/2, (-1,0), shadow)
+ self.draw_circular_shadow(x1-4, y0+4, 4, 3*math.pi/2, 2*math.pi, (0,-1), shadow)
+ self.draw_circular_shadow(x0+4, y1-4, 4, math.pi/2, math.pi, (0,1), shadow)
+ self.draw_circular_shadow(x1-4, y1-4, 4, 0, math.pi/2, (1,0), shadow)
+
+ def render_plot(self):
+ for number,item in enumerate(self.data):
+ if hasattr(item, "__delitem__") :
+ for space in item:
+ self.render_rectangle(self.borders[HORZ] + space[0]*self.horizontal_step,
+ self.borders[VERT] + number*self.vertical_step + self.vertical_step/4.0,
+ self.borders[HORZ] + space[1]*self.horizontal_step,
+ self.borders[VERT] + number*self.vertical_step + 3.0*self.vertical_step/4.0,
+ self.series_colors[number])
+ else:
+ space = item
+ self.render_rectangle(self.borders[HORZ] + space[0]*self.horizontal_step,
+ self.borders[VERT] + number*self.vertical_step + self.vertical_step/4.0,
+ self.borders[HORZ] + space[1]*self.horizontal_step,
+ self.borders[VERT] + number*self.vertical_step + 3.0*self.vertical_step/4.0,
+ self.series_colors[number])
+def dot_line_plot(name,
+ data,
+ width,
+ height,
+ background = None,
+ border = 0,
+ axis = False,
+ grid = False,
+ dots = False,
+ h_labels= None,
+ v_labels = None,
+ h_bounds = None,
+ v_bounds = None):
+ '''
+ - Function to plot graphics using dots and lines.
+
+ dot_line_plot (name, data, width, height, background = None, border = 0, axis = False, grid = False, h_labels = None, v_labels = None, h_bounds = None, v_bounds = None)
+
+ - Parameters
+
+ name - Name of the desired output file, no need to input the .svg as it will be added at runtim;
+ data - The list, list of lists or dictionary holding the data to be plotted;
+ width, height - Dimensions of the output image;
+ background - A 3 element tuple representing the rgb color expected for the background or a new cairo linear gradient.
+ If left None, a gray to white gradient will be generated;
+ border - Distance in pixels of a square border into which the graphics will be drawn;
+ axis - Whether or not the axis are to be drawn;
+ grid - Whether or not the gris is to be drawn;
+ dots - Whether or not dots should be shown at each point;
+ h_labels, v_labels - lists of strings containing the horizontal and vertical labels for the axis;
+ h_bounds, v_bounds - tuples containing the lower and upper value bounds for the data to be plotted.
+
+ - Examples of use
+
+ teste_data = [0, 1, 3, 8, 9, 0, 10, 10, 2, 1]
+ CairoPlot.dot_line_plot('teste', teste_data, 400, 300)
+
+ teste_data_2 = {"john" : [10, 10, 10, 10, 30], "mary" : [0, 0, 3, 5, 15], "philip" : [13, 32, 11, 25, 2]}
+ teste_h_labels = ["jan/2008", "feb/2008", "mar/2008", "apr/2008", "may/2008"]
+ CairoPlot.dot_line_plot('teste2', teste_data_2, 400, 300, axis = True, grid = True, dots = True, h_labels = teste_h_labels)
+ '''
+ plot = DotLinePlot(name, data, width, height, background, border,
+ axis, grid, dots, h_labels, v_labels, h_bounds, v_bounds)
+ plot.render()
+ plot.commit()
+
+def function_plot(name,
+ data,
+ width,
+ height,
+ background = None,
+ border = 0,
+ axis = True,
+ grid = False,
+ dots = False,
+ h_labels = None,
+ v_labels = None,
+ h_bounds = None,
+ v_bounds = None,
+ step = 1,
+ discrete = False):
+
+ '''
+ - Function to plot functions.
+
+ function_plot(name, data, width, height, background = None, border = 0, axis = True, grid = False, dots = False, h_labels = None, v_labels = None, h_bounds = None, v_bounds = None, step = 1, discrete = False)
+
+ - Parameters
+
+ name - Name of the desired output file, no need to input the .svg as it will be added at runtim;
+ data - The list, list of lists or dictionary holding the data to be plotted;
+ width, height - Dimensions of the output image;
+ background - A 3 element tuple representing the rgb color expected for the background or a new cairo linear gradient.
+ If left None, a gray to white gradient will be generated;
+ border - Distance in pixels of a square border into which the graphics will be drawn;
+ axis - Whether or not the axis are to be drawn;
+ grid - Whether or not the gris is to be drawn;
+ dots - Whether or not dots should be shown at each point;
+ h_labels, v_labels - lists of strings containing the horizontal and vertical labels for the axis;
+ h_bounds, v_bounds - tuples containing the lower and upper value bounds for the data to be plotted;
+ step - the horizontal distance from one point to the other. The smaller, the smoother the curve will be;
+ discrete - whether or not the function should be plotted in discrete format.
+
+ - Example of use
+
+ data = lambda x : x**2
+ CairoPlot.function_plot('function4', data, 400, 300, grid = True, h_bounds=(-10,10), step = 0.1)
+
+ '''
+
+ plot = FunctionPlot(name, data, width, height, background, border,
+ axis, grid, dots, h_labels, v_labels, h_bounds, v_bounds, step, discrete)
+ plot.render()
+ plot.commit()
+
+
+def pie_plot(name, data, width, height, background = None, gradient = False, shadow = False, colors = None):
+
+ '''
+ - Function to plot pie graphics.
+
+ pie_plot(name, data, width, height, background = None, gradient = False)
+
+ - Parameters
+
+ name - Name of the desired output file, no need to input the .svg as it will be added at runtim;
+ data - The list, list of lists or dictionary holding the data to be plotted;
+ width, height - Dimensions of the output image;
+ background - A 3 element tuple representing the rgb color expected for the background or a new cairo linear gradient.
+ If left None, a gray to white gradient will be generated;
+ gradient - Whether or not the pie color will be painted with a gradient;
+ shadow - Whether or not there will be a shadow behind the pie;
+ colors - List of slices colors.
+
+ - Examples of use
+
+ teste_data = {"john" : 123, "mary" : 489, "philip" : 890 , "suzy" : 235}
+ CairoPlot.pie_plot("pie_teste", teste_data, 500, 500)
+
+ '''
+
+ plot = PiePlot(name, data, width, height, background, gradient, shadow, series_colors = colors)
+ plot.render()
+ plot.commit()
+
+def donut_plot(name, data, width, height, background = None, gradient = False, shadow = False, colors = None, inner_radius = -1):
+
+ '''
+ - Function to plot donut graphics.
+
+ donut_plot(name, data, width, height, background = None, gradient = False, inner_radius = -1)
+
+ - Parameters
+
+ name - Name of the desired output file, no need to input the .svg as it will be added at runtim;
+ data - The list, list of lists or dictionary holding the data to be plotted;
+ width, height - Dimensions of the output image;
+ background - A 3 element tuple representing the rgb color expected for the background or a new cairo linear gradient.
+ If left None, a gray to white gradient will be generated;
+ shadow - Whether or not there will be a shadow behind the donut;
+ gradient - Whether or not the donut color will be painted with a gradient;
+ colors - List of slices colors;
+ inner_radius - The radius of the donut's inner circle.
+
+ - Examples of use
+
+ teste_data = {"john" : 123, "mary" : 489, "philip" : 890 , "suzy" : 235}
+ CairoPlot.donut_plot("donut_teste", teste_data, 500, 500)
+
+ '''
+
+ plot = DonutPlot(name, data, width, height, background, gradient, shadow, colors, inner_radius)
+ plot.render()
+ plot.commit()
+
+def gantt_chart(name, pieces, width, height, h_labels, v_labels, colors):
+
+ '''
+ - Function to generate Gantt Diagrams.
+
+ gantt_chart(name, pieces, width, height, h_labels, v_labels, colors):
+
+ - Parameters
+
+ name - Name of the desired output file, no need to input the .svg as it will be added at runtim;
+ pieces - A list defining the spaces to be drawn. The user must pass, for each line, the index of its start and the index of its end. If a line must have two or more spaces, they must be passed inside a list;
+ width, height - Dimensions of the output image;
+ h_labels - A list of names for each of the vertical lines;
+ v_labels - A list of names for each of the horizontal spaces;
+ colors - List containing the colors expected for each of the horizontal spaces
+
+ - Example of use
+
+ pieces = [ (0.5,5.5) , [(0,4),(6,8)] , (5.5,7) , (7,8)]
+ h_labels = [ 'teste01', 'teste02', 'teste03', 'teste04']
+ v_labels = [ '0001', '0002', '0003', '0004', '0005', '0006', '0007', '0008', '0009', '0010' ]
+ colors = [ (1.0, 0.0, 0.0), (1.0, 0.7, 0.0), (1.0, 1.0, 0.0), (0.0, 1.0, 0.0) ]
+ CairoPlot.gantt_chart('gantt_teste', pieces, 600, 300, h_labels, v_labels, colors)
+
+ '''
+
+ plot = GanttChart(name, pieces, width, height, h_labels, v_labels, colors)
+ plot.render()
+ plot.commit()
+
+def bar_plot(name,
+ data,
+ width,
+ height,
+ background = None,
+ border = 0,
+ grid = False,
+ rounded_corners = False,
+ three_dimension = False,
+ h_labels = None,
+ v_labels = None,
+ h_bounds = None,
+ v_bounds = None,
+ colors = None):
+
+ '''
+ - Function to generate Bar Plot Charts.
+
+ bar_plot(name, data, width, height, background, border, grid, rounded_corners, three_dimension,
+ h_labels, v_labels, h_bounds, v_bounds, colors):
+
+ - Parameters
+
+ name - Name of the desired output file, no need to input the .svg as it will be added at runtime;
+ data - The list, list of lists or dictionary holding the data to be plotted;
+ width, height - Dimensions of the output image;
+ background - A 3 element tuple representing the rgb color expected for the background or a new cairo linear gradient.
+ If left None, a gray to white gradient will be generated;
+ border - Distance in pixels of a square border into which the graphics will be drawn;
+ grid - Whether or not the gris is to be drawn;
+ rounded_corners - Whether or not the bars should have rounded corners;
+ three_dimension - Whether or not the bars should be drawn in pseudo 3D;
+ h_labels, v_labels - lists of strings containing the horizontal and vertical labels for the axis;
+ h_bounds, v_bounds - tuples containing the lower and upper value bounds for the data to be plotted;
+ colors - List containing the colors expected for each of the bars.
+
+ - Example of use
+
+ data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+ CairoPlot.bar_plot ('bar2', data, 400, 300, border = 20, grid = True, rounded_corners = False)
+ '''
+
+ plot = BarPlot(name, data, width, height, background, border,
+ grid, rounded_corners, three_dimension, h_labels, v_labels, h_bounds, v_bounds, colors)
+ plot.render()
+ plot.commit()
+
projects / cs-p2p-next.git / commitdiff