Flex Sparkline
February 8th, 2010
Sparklines are described by their inventor, Edward Tufte, as “data-intense, design-simple, word-sized graphics”. They are an ideal tool for displaying trends for single entries within large data sets, for example, stock prices. As well as the standard miniature line series, Tufte’s original specification introduces a ternary sparkline, a.k.a. win-loss sparkline, where small columns [...]
Missing values in Flex charts
April 14th, 2009
An oddness in default behaviour that can throw those new to Flex Charting is that segments in charts that should correspond to a data point are missing. By this I mean charts like those in the following example:
When what is actually desired is the following:
This is achieved by setting the filterData property on the [...]
Custom data tips in stacked Flex charts
March 24th, 2009
The number of frustrating decisions in Flex’s charting API is minimal, but high up on my list is a strange decision that prevents developers from accessing information that is frequently desirable for custom data tips in stacked area, bar and column charts. The default data tips for stacked charts display, amongst other things, the [...]
Adding a Location Crosshair to Silverlight charts (again!)
March 23rd, 2009
Silverlight is moving fast. Really fast. The recent MIX09 conference saw the release of Silverlight 3 (Beta) and also a new release of the Silverlight Toolkit. All this change is making it hard for us bloggers to keep up!
Just over a month ago I posted an article on this blog about how to add a [...]
Save Flex chart as image
March 4th, 2009
The ability to allow a user to save a Flex chart, or in fact any Flex UI component, as an image has popped up on my radar several times over the last few years. Solutions to the problem have generally involved producing a pop-up window with the UI component as an image that the user [...]
Adding a Location Crosshair to Silverlight Charts
February 4th, 2009
UPDATE – The March09 update of the Silverlight toolkit is incompatible with the code detailed below. For an up-to-date version see the following blog post.
This blog post describes how to add a location crosshair to your Silverlight charts as shown below:
The chart itself is rendered using the charting component of the recently release [...]