Class | Prawn::Chart::Base |
In: |
lib/prawn/graph/base.rb
|
Parent: | Object |
Prawn::Chart::Base implements the common methods shared by most of the graphs and charts whcih will need to be plotted.
All Prawn::Chart::Base instances and their children will have the following associated with them:
1. A Prawn::Chart::Grid which is where the graph will be drawn 2. A refernce to the Prawn::Document being affected 3. A set of data to be plotted.
A public draw method is available which does what it says on the tin and… well.. draws the graph on the document it has a reference to.
colour | [RW] | |
document | [RW] | |
grid | [RW] | |
headings | [RW] | |
highest_value | [RW] | |
values | [RW] |
Returns a new instance of a graph to be drawn, really only useful for the subclasses which actually have a plot_values method declared so the data is actually rendered as a graph.
Takes an Array of data, which should contain complete rows of data for values to be plotted; a reference to a document which should be an instance of Prawn::Document and an options with at least a value for :at specified.
Options are:
:at , which should be an Array representing the point at which the graph should be drawn. :title, the title for this graph, wil be rendered centered to the top of the Grid. :label_x, a label to be shown along the X axis of he graph, rendered centered on the grid. :label_y, a label to be shown along the Y axis of he graph, rendered centered on the grid and rotated to be perpendicular to the axis.
:theme, the theme to be used to draw this graph, defaults to monochrome.