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Engineering LibreTexts

13.6: Interactors

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    \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)

    To prompt the user for input, the UIManager class provides a large number of ready to use dialog boxes. For instance, the request:initialAnswer: method returns the string entered by the user (Figure \(\PageIndex{1}\)).

    UIManager default request: 'What''s your name?' initialAnswer: 'no name'

    To display a popup menu, use one of the various chooseFrom: methods (Figure \(\PageIndex{2}\)):

    UIManager default
    chooseFrom: #('circle' 'oval' 'square' 'rectangle' 'triangle')
    lines: #(2 4) message: 'Choose a shape'

    Browse the UIManager class and try out some of the interaction methods offered.

    An input dialog.
    Figure \(\PageIndex{1}\): An input dialog.
    Pop-up menu.
    Figure \(\PageIndex{2}\): Pop-up menu.

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