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@ -1,5 +1,5 @@
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#!python |
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# -*- coding: UTF-8 -*- |
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# -*- coding: utf-8 -*- |
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""" |
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svg.charts.graph |
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@ -14,6 +14,7 @@ import functools
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import cssutils |
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from lxml import etree |
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from xml import xpath |
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from svg.charts import css # causes the SVG profile to be loaded |
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@ -22,12 +23,15 @@ try:
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except ImportError: |
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zlib = None |
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def sort_multiple(arrays): |
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"sort multiple lists (of equal size) using the first list for the sort keys" |
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"sort multiple lists (of equal size) " |
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"using the first list for the sort keys" |
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tuples = zip(*arrays) |
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tuples.sort() |
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return zip(*tuples) |
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class Graph(object): |
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""" |
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Base object for generating SVG Graphs |
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@ -47,46 +51,48 @@ class Graph(object):
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* svg.charts.time_series |
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""" |
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width= 500 |
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height= 300 |
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show_x_guidelines= False |
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show_y_guidelines= True |
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show_data_values= True |
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min_scale_value= None |
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show_x_labels= True |
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stagger_x_labels= False |
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rotate_x_labels= False |
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step_x_labels= 1 |
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step_include_first_x_label= True |
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show_y_labels= True |
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rotate_y_labels= False |
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stagger_y_labels= False |
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step_include_first_y_label= True |
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step_y_labels= 1 |
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scale_integers= False |
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show_x_title= False |
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x_title= 'X Field names' |
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show_y_title= False |
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y_title_text_direction= 'bt' # 'bt' for bottom to top; 'tb' for top to bottom |
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y_title= 'Y Scale' |
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show_graph_title= False |
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graph_title= 'Graph Title' |
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show_graph_subtitle= False |
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graph_subtitle= 'Graph Subtitle' |
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key= True |
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key_position= 'right' # 'bottom' or 'right', |
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font_size= 12 |
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title_font_size= 16 |
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subtitle_font_size= 14 |
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x_label_font_size= 12 |
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x_title_font_size= 14 |
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y_label_font_size= 12 |
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y_title_font_size= 14 |
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key_font_size= 10 |
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css_inline= False |
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add_popups= False |
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width = 500 |
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height = 300 |
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show_x_guidelines = False |
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show_y_guidelines = True |
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show_data_values = True |
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min_scale_value = None |
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show_x_labels = True |
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stagger_x_labels = False |
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rotate_x_labels = False |
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step_x_labels = 1 |
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step_include_first_x_label = True |
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show_y_labels = True |
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rotate_y_labels = False |
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stagger_y_labels = False |
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step_include_first_y_label = True |
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step_y_labels = 1 |
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scale_integers = False |
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show_x_title = False |
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x_title = 'X Field names' |
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show_y_title = False |
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# 'bt' for bottom to top; 'tb' for top to bottom |
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y_title_text_direction = 'bt' |
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y_title = 'Y Scale' |
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show_graph_title = False |
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graph_title = 'Graph Title' |
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show_graph_subtitle = False |
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graph_subtitle = 'Graph Subtitle' |
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key = True |
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# 'bottom' or 'right', |
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key_position = 'right' |
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font_size = 12 |
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title_font_size = 16 |
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subtitle_font_size = 14 |
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x_label_font_size = 12 |
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x_title_font_size = 14 |
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y_label_font_size = 12 |
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y_title_font_size = 14 |
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key_font_size = 10 |
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css_inline = False |
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add_popups = False |
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top_align = top_font = right_align = right_font = 0 |
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@ -94,7 +100,7 @@ class Graph(object):
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stylesheet_names = ['graph.css'] |
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def __init__(self, config = {}): |
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def __init__(self, config={}): |
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"""Initialize the graph object with the graph settings.""" |
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if self.__class__ is Graph: |
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raise NotImplementedError("Graph is an abstract base class") |
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@ -124,12 +130,15 @@ class Graph(object):
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try: |
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assert(isinstance(conf['data'], (tuple, list))) |
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except TypeError, e: |
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raise TypeError, "conf should be dictionary with 'data' and other items" |
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raise TypeError( |
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"conf should be dictionary with 'data' and other items") |
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except AssertionError: |
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if not hasattr(conf['data'], '__iter__'): |
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raise TypeError, "conf['data'] should be tuple or list or iterable" |
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raise TypeError( |
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"conf['data'] should be tuple or list or iterable") |
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def process_data(self, data): pass |
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def process_data(self, data): |
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pass |
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def clear_data(self): |
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""" |
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@ -148,9 +157,11 @@ class Graph(object):
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Raises ValueError when no data set has |
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been added to the graph object. |
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""" |
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if not self.data: raise ValueError("No data available") |
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if not self.data: |
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raise ValueError("No data available") |
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if hasattr(self, 'calculations'): self.calculations() |
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if hasattr(self, 'calculations'): |
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self.calculations() |
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self.start_svg() |
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self.calculate_graph_dimensions() |
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@ -166,9 +177,12 @@ class Graph(object):
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def _burn_compressed(self): |
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if self.compress and not zlib: |
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self.root.addprevious(etree.Comment('Python zlib not available for SVGZ')) |
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self.root.addprevious( |
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etree.Comment('Python zlib not available for SVGZ')) |
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data = etree.tostring(self.root, pretty_print=True, xml_declaration=True, encoding='utf-8') |
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data = etree.tostring( |
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self.root, pretty_print=True, |
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xml_declaration=True, encoding='utf-8') |
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if self.compress and zlib: |
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data = zlib.compress(data) |
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@ -189,10 +203,14 @@ class Graph(object):
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else: |
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label_lengths = map(len, self.get_y_labels()) |
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max_y_label_len = max(label_lengths) |
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max_y_label_height_px = 0.6 * max_y_label_len * self.y_label_font_size |
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if self.show_y_labels: bl += max_y_label_height_px |
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if self.stagger_y_labels: bl += max_y_label_height_px + 10 |
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if self.show_y_title: bl += self.y_title_font_size + 5 |
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max_y_label_height_px = (0.6 * max_y_label_len * |
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self.y_label_font_size) |
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if self.show_y_labels: |
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bl += max_y_label_height_px |
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if self.stagger_y_labels: |
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bl += max_y_label_height_px + 10 |
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if self.show_y_title: |
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bl += self.y_title_font_size + 5 |
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self.border_left = bl |
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def max_y_label_width_px(self): |
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@ -222,17 +240,19 @@ class Graph(object):
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border_top. |
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""" |
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self.border_top = 5 |
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if self.show_graph_title: self.border_top += self.title_font_size |
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if self.show_graph_title: |
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self.border_top += self.title_font_size |
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self.border_top += 5 |
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if self.show_graph_subtitle: self.border_top += self.subtitle_font_size |
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if self.show_graph_subtitle: |
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self.border_top += self.subtitle_font_size |
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def add_popup(self, x, y, label): |
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""" |
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Add pop-up information to a point on the graph. |
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""" |
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txt_width = len(label) * self.font_size * 0.6 + 10 |
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tx = x + [5,-5][int(x+txt_width > self.width)] |
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anchor = ['start', 'end'][x+txt_width > self.width] |
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tx = x + [5, -5][int(x + txt_width > self.width)] |
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anchor = ['start', 'end'][x + txt_width > self.width] |
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style = 'fill: #000; text-anchor: %s;' % anchor |
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id = 'label-%s' % label |
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t = etree.SubElement(self.foreground, 'text', { |
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@ -245,7 +265,8 @@ class Graph(object):
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}) |
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# add the circle element to the foreground |
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visibility = "document.getElementById('%s').setAttribute('visibility', %%s)" % id |
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visibility = ("document.getElementById('%s')." |
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"setAttribute('visibility', %%s)" % id) |
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t = etree.SubElement(self.foreground, 'circle', { |
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'cx': str(x), |
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'cy': str(y), |
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@ -271,8 +292,10 @@ class Graph(object):
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max_x_label_len = reduce(max, label_lengths) |
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max_x_label_height_px *= 0.6 * max_x_label_len |
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bb += max_x_label_height_px |
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if self.stagger_x_labels: bb += max_x_label_height_px + 10 |
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if self.show_x_title: bb += self.x_title_font_size + 5 |
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if self.stagger_x_labels: |
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bb += max_x_label_height_px + 10 |
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if self.show_x_title: |
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bb += self.x_title_font_size + 5 |
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self.border_bottom = bb |
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def draw_graph(self): |
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@ -336,7 +359,8 @@ class Graph(object):
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'y': str(y), |
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'class': 'dataPointLabel'}) |
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e.text = str(value) |
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if style: e.set('style', style) |
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if style: |
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e.set('style', style) |
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def draw_x_labels(self): |
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"Draw the X axis labels" |
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@ -374,7 +398,7 @@ class Graph(object):
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if self.rotate_x_labels: |
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transform = 'rotate(90 %d %d) translate(0 -%d)' % \ |
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(x, y-self.x_label_font_size, self.x_label_font_size/4) |
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(x, y - self.x_label_font_size, self.x_label_font_size / 4) |
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text.set('transform', transform) |
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text.set('style', 'text-anchor: start') |
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else: |
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@ -388,13 +412,14 @@ class Graph(object):
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return 0 |
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def get_field_width(self): |
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return float(self.graph_width - self.font_size*2*self.right_font) / \ |
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(len(self.get_x_labels()) - self.right_align) |
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return (float( |
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self.graph_width - self.font_size * 2 * self.right_font) / |
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(len(self.get_x_labels()) - self.right_align)) |
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field_width = get_field_width |
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def get_field_height(self): |
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return float(self.graph_height - self.font_size*2*self.top_font) / \ |
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(len(self.get_y_labels()) - self.top_align) |
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return (float(self.graph_height - self.font_size * 2 * self.top_font) / |
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(len(self.get_y_labels()) - self.top_align)) |
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field_height = get_field_height |
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def draw_y_labels(self): |
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@ -414,7 +439,8 @@ class Graph(object):
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def get_y_offset(self): |
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result = self.graph_height + self.y_label_offset(self.field_height()) |
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if not self.rotate_y_labels: result += self.font_size/1.2 |
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if not self.rotate_y_labels: |
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result += self.font_size / 1.2 |
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return result |
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y_offset = property(get_y_offset) |
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@ -425,7 +451,7 @@ class Graph(object):
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text.text = label |
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y = self.y_offset - (label_height * index) |
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x = {True: 0, False:-3}[self.rotate_y_labels] |
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x = {True: 0, False: -3}[self.rotate_y_labels] |
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if self.stagger_y_labels and (index % 2): |
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stagger = self.y_label_font_size + 5 |
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@ -444,15 +470,16 @@ class Graph(object):
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text.set('transform', transform) |
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text.set('style', 'text-anchor: middle') |
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else: |
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text.set('y', str(y - self.y_label_font_size/2)) |
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text.set('y', str(y - self.y_label_font_size / 2)) |
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text.set('style', 'text-anchor: end') |
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def draw_x_guidelines(self, label_height, count): |
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"Draw the X-axis guidelines" |
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if not self.show_x_guidelines: return |
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if not self.show_x_guidelines: |
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return |
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# skip the first one |
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for count in range(1,count): |
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start = label_height*count |
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for count in range(1, count): |
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start = label_height * count |
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stop = self.graph_height |
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path = etree.SubElement(self.graph, 'path', { |
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'd': 'M %(start)s 0 v%(stop)s' % vars(), |
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@ -460,9 +487,10 @@ class Graph(object):
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def draw_y_guidelines(self, label_height, count): |
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"Draw the Y-axis guidelines" |
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if not self.show_y_guidelines: return |
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if not self.show_y_guidelines: |
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return |
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for count in range(1, count): |
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start = self.graph_height - label_height*count |
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start = self.graph_height - label_height * count |
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stop = self.graph_width |
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path = etree.SubElement(self.graph, 'path', { |
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'd': 'M 0 %(start)s h%(stop)s' % vars(), |
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@ -470,10 +498,14 @@ class Graph(object):
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def draw_titles(self): |
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"Draws the graph title and subtitle" |
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if self.show_graph_title: self.draw_graph_title() |
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if self.show_graph_subtitle: self.draw_graph_subtitle() |
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if self.show_x_title: self.draw_x_title() |
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if self.show_y_title: self.draw_y_title() |
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if self.show_graph_title: |
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self.draw_graph_title() |
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if self.show_graph_subtitle: |
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self.draw_graph_subtitle() |
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if self.show_x_title: |
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self.draw_x_title() |
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if self.show_y_title: |
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self.draw_y_title() |
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def draw_graph_title(self): |
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text = etree.SubElement(self.root, 'text', { |
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@ -483,10 +515,11 @@ class Graph(object):
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text.text = self.graph_title |
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def draw_graph_subtitle(self): |
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y_subtitle_options = [subtitle_font_size, title_font_size+10] |
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y_subtitle_options = [self.subtitle_font_size, |
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self.title_font_size + 10] |
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y_subtitle = y_subtitle_options[self.show_graph_title] |
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text = etree.SubElement(self.root, 'text', { |
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'x': str(self.width/2), |
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'x': str(self.width / 2), |
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'y': str(y_subtitle), |
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'class': 'subTitle', |
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}) |
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@ -495,8 +528,9 @@ class Graph(object):
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def draw_x_title(self): |
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y = self.graph_height + self.border_top + self.x_title_font_size |
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if self.show_x_labels: |
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y_size = self.x_label_font_size+5 |
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if self.stagger_x_labels: y_size*=2 |
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y_size = self.x_label_font_size + 5 |
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if self.stagger_x_labels: |
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y_size *= 2 |
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y += y_size |
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x = self.width / 2 |
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@ -509,7 +543,7 @@ class Graph(object):
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def draw_y_title(self): |
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x = self.y_title_font_size |
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if self.y_title_text_direction=='bt': |
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if self.y_title_text_direction == 'bt': |
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x += 3 |
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rotate = -90 |
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else: |
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@ -560,16 +594,16 @@ class Graph(object):
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x_offset = self.border_left + 20 |
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y_offset = self.border_top + self.graph_height + 5 |
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if self.show_x_labels: |
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max_x_label_height_px = x_label_font_size |
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max_x_label_height_px = self.x_label_font_size |
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if self.rotate_x_labels: |
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longest_label_length = max(map(len, self.get_x_labels())) |
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# note: I think 0.6 is the ratio of width to height of characters |
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# I think 0.6 is the ratio of width to height of characters |
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max_x_label_height_px *= longest_label_length * 0.6 |
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y_offset += max_x_label_height_px |
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if self.stagger_x_labels: |
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y_offset += max_x_label_height_px + 5 |
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if self.show_x_title: |
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y_offset += x_title_font_size + 5 |
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y_offset += self.x_title_font_size + 5 |
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return x_offset, y_offset |
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def render_inline_styles(self): |
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@ -612,11 +646,12 @@ class Graph(object):
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'xlink': 'http://www.w3.org/1999/xlink', |
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'a3': 'http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/', |
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} |
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self.root = etree.Element(SVG+"svg", attrib={ |
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self.root = etree.Element(SVG + "svg", attrib={ |
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'width': str(self.width), |
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'height': str(self.height), |
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'viewBox': '0 0 %s %s' % (self.width, self.height), |
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'{http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/}scriptImplementation': 'Adobe', |
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'{http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/}' |
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'scriptImplementation': 'Adobe', |
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}, nsmap=NSMAP) |
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if hasattr(self, 'style_sheet_href'): |
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pi = etree.ProcessingInstruction( |
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@ -630,7 +665,7 @@ class Graph(object):
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' SVG.Graph by Jason R. Coombs ', |
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' Based on SVG::Graph by Sean E. Russel ', |
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' Based on Perl SVG:TT:Graph by Leo Lapworth & Stephan Morgan ', |
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' '+'/'*66, |
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' ' + '/' * 66, |
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) |
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map(self.root.append, map(etree.Comment, comment_strings)) |
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@ -638,10 +673,11 @@ class Graph(object):
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self.add_defs(defs) |
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if not hasattr(self, 'style_sheet_href') and not self.css_inline: |
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self.root.append(etree.Comment(' include default stylesheet if none specified ')) |
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self.root.append(etree.Comment( |
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' include default stylesheet if none specified ')) |
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style = etree.SubElement(defs, 'style', type='text/css') |
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# TODO: the text was previously escaped in a CDATA declaration... how |
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# to do that with etree? |
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# TODO: the text was previously escaped in a CDATA declaration... |
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# how to do that with etree? |
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style.text = self.get_stylesheet().cssText |
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self.root.append(etree.Comment('SVG Background')) |
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@ -679,11 +715,13 @@ class Graph(object):
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def get_stylesheet(self): |
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cssutils.log.setLevel(30) # disable INFO log messages |
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def merge_sheets(s1, s2): |
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map(s1.add, s2) |
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return s1 |
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return reduce(merge_sheets, self.get_stylesheet_resources()) |
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class class_dict(object): |
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"Emulates a dictionary, but retrieves class attributes" |
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def __init__(self, obj): |
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Florian Mounier
13 years ago