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About Drawing 13-1
CHAPTER 13
Drawing and Graphics 13
Figure 13-0
Table 13-0
This chapter describes how to draw graphical objects such as lines and rectangles
in Newton applications.
You should read this chapter if you are attempting to draw complex or primitive
graphical objects in a view. Before reading this chapter, you should be familiar
with the information in Chapter 3, “Views.
This chapter describes:
the types of graphical objects supported and how to draw them
drawing methods and functions used to perform specic tasks
drawing classes and protos that operate on graphics and drawing methods
and functions
About Drawing 13
The drawing interface provides a number of functions, methods, and protos that
allow you to create graphic objects in Newton applications. Objects can be shapes,
pictures, or rendered bitmaps. Additional functions and methods provide ways to
scale, transform, or rotate the images. All objects are drawn into views. See “View
Instantiation” (page 3-26) for complete details.
This section provides detailed conceptual information on drawing functions and
methods. Specically, it covers the following:
supported shape objects
the style frame
new functions, methods, and messages added for Newton OS 2.0, as well as
modications to existing pieces of the drawing code
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