Quote: the graphics standards use basic input types such as locator, stroke, valuator, choice, pick, and string; modal and no control

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The approach used by all of the graphics … valuator, choice, pick, and string for PHIGS [ref]). This is based on a model by Foley and Wallace … [Proc IEEE 62.4:462- 71 April 1974] … Unfortunately, these abstractions have proven to be inadequate … [ref], in two important ways: (1) They are modal. For example, … choose an item from a menu. … (2) … There is little control over the style of …   Google-1   Google-2

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Additional Titles

Quote: a user interface should not block while waiting for user input; e.g., a menu selection; modal

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