A command tile can be recognized by the ! icon on its left. Reduce an object to a button with a similar toolbar icon for restoring the object.Ī 24-bit color that can be chosen from a color picker such as this one.Īn area that holds color samples for reuse during a Paint session.Ī scripting tile containing an executable command, in contrast with assignment and test tiles. Use this tan tool to reduce an object to a button with a similar toolbar icon for restoring the object. Run this script when the object is closed. Most Smalltalk classes are defined entirely in Smalltalk, but some that deal with the external world or with system fundamentals, including the core of the object hierarchy, are implemented in a Virtual Machine.Ī tool for clearing a drawing and starting over. Every class is an instance of the class called Class. Thus the class Integer is a subclass of Number, and defines methods for various arithmetic operations.
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The definition of a class consists of a specification of its superclass, of declarations of variables, and of code for methods. In the Smalltalk language, everything is an object, created as an instance of a class. Halo tools for styling text within an object. In the viewer for a button object, the following menu of programming tiles.Ī type for variables that can have the values button up, button down, or while pressed, corresponding to the states of a ThreePhaseButton.ĭepending on the object type, a purple tool to open a colorpicker or to allow the user to select a color from the screen. Click the Sharing button to begin.Īn Etoys object, a button with editable text. In the Sugar version of Etoys, another Sugar user connected via the collaboration mechanism. In Etoys Curve Morphs, curvy polygons, and such, the adjustment points are in the middle of segments, thus.Ī multi-page structure for creating texts, presentations, and the like by dropping in other objects, with controls for adding or removing pages and for navigating.Ī type for variables that can have one of just two values, True or False.Ī type for variables that can have any of the following values:Įtoys objects generally have a border style tile such as this:Ĭhanging the setting affects the appearance of objects that use a border.Ĭlick in an image being edited to flood the connected area of the same color as the selected point with the current painting color. Cubic curves can be defined algebraically by cubic equations, or visually, by specifying a start and end point and the directions and curvatures at both with handles for adjustment. Each of these options appears in another category (geometry, motion, or sound) as well.Ī smooth curve made of segments of cubic curves joined smoothly together. Displayed by default when a viewer is opened. Further information is available using the introspection tools in Squeak, described in the Programming Tools chapter.Īspect ratio Ratio of width to height of an image, Morph, window, or screen.īadge The tool for communicating with joined buddies, providing information on the person connected with, and various modes of communication.īalloon help Help text that appears when the user hovers the mouse pointer over an object.Įditable by users as shown here with the Halo menu selection below.īasic (viewer category) A menu of commonly used options in any object viewer. Etoys objects are described in the Objects and More Objects chapters, and the corresponding Squeak objects in the Morph Definitions appendix.
It does not attempt to explain the names of Etoys or Squeak objects. This glossary collects and defines the terminology and abbreviations used in Etoys, and to the extent necessary for explaining Etoys, terminology from Squeak and Smalltalk also, where they differ from usage in other realms. It is much worse when most of the structure is deliberately hidden from the user, as is the case with Etoys. This problem is compounded in the case of a highly-structured but also highly non-linear system. It is good practice to define terms on first use, but this is not sufficient. Whether it is an equal problem to know the terms but not what they mean depends in part on the organization of a document. What does the learner look for? So one purpose of a glossary such as this is to bring the terminology together where it can be discovered. One of the greatest problems facing the learner of a programming system, or indeed almost anything, is not knowing the conventional names for things.
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