Hello Sometimes when writing an interactive plot with @interact I would like to select a 2D point. I can put two input boxes, one for each coordinate. When either coordinate is updated, it starts to recompute the graph, while I'd prefer it to compute only when both coordinates are changed. But that's a minor issue: what I'd really like is to click on the graph to select the point. Is this in your wishlist too? I think it might conflict with how @interact works: first fill the controls, then the function does whatever, it may be a graph or not, and there's no feedback from the output of the function back into the interact controls. There might also be more than one point, so what to do with a click? I have a suggestion: if an argument of the function is of type point (instead of, say, input_box) then there are two boxes, one for each coordinate, but also a draggable object, the size of a small circle. I've seen drag and drop work using the scriptaculous javascrtipt library, so it looks possible. When the object is dropped onto any picture, it will trigger an update of the point coordinates. So there would be several points, each with a different color, and the points would be drawn on top of the graph with their respective colors on their current positions so that the user knows what she's about to change. If she drags the handle within the point box in the interact part, and drop it in a position different than the current, the graph would be updated. Any ideas? Is this feasible/desirable? Regards Pablo
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