google_chart

Make charts with Google.

This tag interfaces to the Google chart API to dynamically generate charts.

For example:

{% google_chart type="line" axis={axis position="bottom" labels=["jan","feb","mar"]}
   axis={axis position="left" labels=[0,25,50,75,100]} data=[{data values=[20,80,33]}] %}

Will generate the following image tag:

<img class='google_chart' alt='google chart'
   src='http://chart.apis.google.com/chart?&amp;cht=lc&amp;chts=909090,10&amp;chs=300x150&amp;chg=0,0,1,5&amp;chf=bg,s,ffffff|c,s,ffffff&amp;chdlp=b&amp;chbh=-3,3,7&amp;chxt=x,y&amp;chxl=0:|jan|feb|mar|1:|0|25|50|75|100&amp;chxs=0,909090,10|1,909090,10&amp;chco=&amp;chds=0,100&amp;chd=t:20,80,33&amp;chls=1,1,0'
   width='300' height='150'/>

View the chart.

Google chart accepts the following arguments:

Argument	Description	Example
type	Kind of chart is generated. One of “line”, “sparkline”, “stacked_horizontal_bar”, “stacked_vertical_bar”, “grouped_horizontal_bar”, “grouped_vertical_bar”, “pie” or “pie3d”. Defaults to “line”.	type=”sparkline”
id	The id of the generated image tag.	id=”mychart”
class	CSS class of the generated image tag. The class “google_chart” is always added.	class=”chart”
style	CSS style attribute for the generated image tag.	style=”border: 1px solid #fcc”
title	Title shown on the chart.	title=”Browser shares”
color	Color for the title. Must be in hexadecimal, defaults to “909090”.	color=”ffcc00”
font_size	Font size in pixels for the title. Defaults to 10.	font_size=12
width	Width of the generated chart. Defaults to 300.	width=450
height	Height of the generated chart.	height=200
grid_x	X axis grid step size.	grid_x=10
grid_y	Y axis grid step size.	grid_y=10
grid_line_length	Length of line segment for the grid lines, defaults to 1.	grid_line_length=1
grid_blank_length	Length of gaps in the grid lines, defaults to 5.	grid_blank_length=5
background_color	Background color for the complete chart. in hexadecimal, defaults to “ffffff”.	background_color=”331133”
chart_color	Background color for the chart area. In hexadecimal, defaults to “ffffff”.	chart_color=”113311”
legend_location	Where the legend is placed. One of “top”, “left”, “bottom” or “right”. Defaults to “bottom”.	legend_location=”right”
axis	Description of an axis. You can given more than one axis argument. See the section Axis styles and labels below.
data	The data to be shown. You can give more than one data argument. See Data definition below.
bar_space	Space in pixels between the bar of a bar chart. Defaults to 3.	bar_space=5
bar_group_space	Space in pixels between the groups of bars of a bar chart. Defaults to 7.	bar_group_space=10

Axis styles and labels

Axis styles and labels are available for line charts and bar charts.

An example for an axis argument is:

axis={axis font_size=10 color="909090" position="top" labels=["jan", "feb", "mar"]}

This defines an axis that will be displayed above the chart. It has three labels and will be displayed in a 10 pixel font with color “909090”. You can give a multiple axis arguments and also a list of axes for each argument.

Valid arguments for an axis are:

Argument	Description	Example
font_size	Size of the labels in pixels. Defaults to 10.	font_size=12
color	Color for the label texts, in hexadecimal RGB. Defaults to “909090”.	color=”cc0000”
position	Which axis is defined. One of “top”, “right”, “bottom” and “left”. Defaults to “top”. You can have multiple definitions for a position.	position=”bottom”
labels	A list with labels displayed. The labels will be evenly distributed over the axis.	labels=[2006,2007,2008\]

Data

All data definitions to be displayed. Each data definition is a record with arguments. You can supply all data sets at once or with multiple data arguments.

Example with one data set:

data=[{data line_width=1 min_value=1 max_value=100 values=[10,20,42,34,68,73,80]}]

Valid arguments for a data record are:

Argument	Description	Example
line_width	The width of the line in pixels. Defaults to 1.	line_width=2
line_length	Length of line segment in pixels. Defaults to 1.	line_length=1
blank_length	Length of blank segment in pixels. Defaults to 0.	blank_length=1
min_value	The minimum value for the data set, used for the axis. Defaults to 0.	min_value=-100
max_value	The maximum value for the data set, used for the axis. Defaults to 100.	max_value=100
color	The color used for this data set. Hexadecimal RGB value.	color=”ffcc00”
legend	Label for the dataset as shown in the legend.	legend=”monthly sales”
values	The values for drawing the chart. Must be a list.	values=[0,10,5,8\]

google_chart

Axis styles and labels

Data

Referred by