mi2b2
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Section
Column

Column

The second is a range slider (left and 2, 3 in the full screenshot above). It is a scroll bar with two end points that users can move independently. The values between (and including) the two endpoints are the values that users select, and the rest are filtered out. This type of filter is useful for values that can be meaningfully ordered, such as dates (3), or have many values (2).

By default, a Range Slider range slider selects all values in the table (nothing is filtered). The lower end point (minimum) and the upper end point (maximum) values are always displayed. The filter action takes place when users release the dragging action of the end point controls. Once a range is set, users can also drag the range thumb to move both the upper and lower end point controls simultaneously. Double clicking on the yellow portion of the range slider resets it.

Combining filters

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Column

Column

Behind the scene, the filter for each column is then combined to filter the entire the table. Within each filter, the values are "OR'ed", while among filters, the values are "AND'ed". For example, the combined filter to the left means

Panel

"Show me all study requests that have modalities of either Magnetic Resonance OR Computed Tomography. AND, in addition, show me only the requests that have been requested in the time period of 7/13/2011 14:01:40-07/15/2011 10:32:45."

Users do not have to do anything to combine filters explicitly. The filters are always active. As soon as users click on a checkbox, or release an endpoint in the range slider, a new

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