Conditional Column Formatting in an Interactive Report?

Question

Is it possible to add conditional column formatting in an Interactive Report in Apex 4.1? I've found numerous examples for older versions using the standard (classic) report, but I haven't found any with the new Interactive Report. Is this possible? and if so, can someone point me in the direction of some documentation or examples?
I simply want to change the color of the text depending on whether a column has a value (eg. Error or Problem).
Thanks

Answer 1

JB wrote:
Is it possible to add conditional column formatting in an Interactive Report in Apex 4.1? I've found numerous examples for older versions using the standard (classic) report, but I haven't found any with the new Interactive Report. Is this possible? and if so, can someone point me in the direction of some documentation or examples?
Oracle Application Express (APEX)
As interactive reports lack the HTML Expression feature of standard reports, the simple way to do this unfortunately requires violating the separation of concerns and generating structural (a <tt>span</tt> element) and presentational (an in-line style sheet) aspects in the query:
select
⋮        
       , case
           when trunc(calling_date,'DD') =  trunc(sysdate,'DD')
           then
             '<!-- ' || to_char(calling_date, 'YYYYMMDD') || ' --><span style="color: #3399FF;">' || to_char(calling_date) || '</span>'
           else
             '<!-- ' || to_char(calling_date, 'YYYYMMDD') || ' --><span>' || to_char(calling_date) || '</span>'
         end calling_date
⋮For number/date columns to be properly sortable, the leading edge of the column must be an HTML comment that provides the required sort order using character semantics, as shown here.
The Display As column attribute for such columns must be set to Standard Report Column.
This method has side effects: some IR filters won't work; aggregate calculations can't be applied to the column; and report exports contain the HTML rather than the expected value.
Other approaches involve using Dynamic Actions/jQuery/JavaScript, or using the built-in highlight as suggested above, then saving the highlighted report as the default.