Hi, I've been writing several wrapper-files for statistical tools, and I was wondering whether it was possible to enhance the tool-interface currently available in the Galaxy web-interface. Ideally, I am looking for options to already display (some) tool-feedback in the user-interface of a tool dependent on the dataset selected from the "history" and user-defined parameters. An example would be a graph re-drawing itself every time the user selects a different dataset or alters a parameter, but simple text-feedback that dynamically updates itself would be a great start already. The "execute" button is now the only way to run code on user-input, and this makes Galaxy a rather cumbersome environment in the case of tools that require many iterations (or just when playing around with parameters). So far, the only limited example I've seen of such "dynamic feedback" is when the user select a matrix from her "history" and Galaxy is able to read the amount of columns, which strictly speaking is a form of generating immediate feedback on the basis of user-selected input, but of course I'd like to define the code myself that is run on the input and what sort of feedback is derived and displayed from this. I have seen the new "visualizations" section of Galaxy, which indeed allows for some of this, but it is clearly separate from the standard tool-funcitonality of Galaxy, and it does not allow for workflows (whereas the above functionality does not clash with workflows, which simply needs to access the static version of the tool). Any help would be greatly appreciated. Tim Dorscheidt Scientific Programmer Biosystems Data Analysis group, SILS University of Amsterdam