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I think it's better for the user to know why he can not do any action. So just don't hide or disable the Button, but show him why he can't push it. Like un forms, you can't submit if required fields are stille empty.


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Usually there is one question that I ask while designing such an interface. Does any user action change the state of the control that is currently disabled? If any user actions toggles the state of the control then it makes sense to have those controls visible but in disabled state. If the control will never be enabled then it makes sense to show it as a ...


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drag'n'drop nearly always has bad affordance. The current model in gmail is the following: gmail's new dd affordance Albeit I'm not sure if they're really serious about it, esp. as it only appears to the hovered element. The previous one was this: gmail's old dd affordance More dragg-ish, but still bad. I think in order to reach good affordance with a ...


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I think it is very important to distinguish draggable items because not all items have the drag functionality. I agree with your suggestion to at least show some indication that items are draggable. This is most often achieved by having the drag icon appear when hovering over a draggable element: I think adding another visual indicator will help ...


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I think Don sometimes makes life unnecessarily complicated with his rather loose use of terminology ! With these two terms we are hopping between two aspects of psychology. 1 / The fairly instinctive world of cognitive psychology to which affordances belong:- tell someone to pick something up and they have an instinctive sense of whether it's too big or ...


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By definition, an affordance is a situation where an object’s sensory characteristics intuitively imply its functionality and use. — Crowdcube The signifier, on the other hand, is the pointing finger, a sound, an image or a word, and it's related to semiotics. Perhaps you mean the difference between an "affordance" and the "signified". The signified is the ...



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