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There are three types of filter widgets in mi2b2 client. The first type of filter widgets is a group of checkboxes (left and 1 in the full screenshot above). mi2b2 will filter out any checkbox that is not selected. By default, all checkboxes are selected (nothing is filtered).

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The second type is the 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 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.

Text Box Filter

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The third type is the text box filter (left (1) ). It is a text box where users can freely enter any text, for example, a list of MRNs. After application, the filter will find items that matches any of the MRNs entered.Text filters are designed only for columns that contain MRNs or Accession Numbers (ANs). We will use MRN as an example, but the mechanics are exactly the same for ANs.

To enter a list of MRNs , users will enter them in the box, separating each MRN by a comma (","), or a space (" "), or a new line (created by pressing "enter" or "return").  Empty lines are ignored. For example, in the figure to the left, (2) shows that the following list of MRNs "0002" "0070" "0110" "1234" and "2525" are correctly entered.

After adding a list of MRNs, users need to press "Apply Filter" to apply the filter. If users wish to remove an existing text box filter, users will need to remove all text in the text box and then press "Apply Filter" to reset the filter to its no-filter default state. Tip: Users can user keyboard short cuts to select everything in the text box (ctrl-a in Windows and command-a in OSX), and then press "delete" or "backspace" to remove them.



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