J2ME in a Nutshell

Graphics Attributes

The Graphics class provides operations that let you do the following:

• Draw straight lines, arcs, and rectangles

• Fill the space occupied by an arc or a rectangle

• Render images

• Draw text presented in the form of a String or as character data

All these operations use a coordinate system to indicate at least their starting point, and most of them also use one or more attributes of the Graphics object that act as implicit parameters. When the paint( ) method is called, the attributes of the Graphics object that is passed to it have well-defined values that can be modified if necessary. The attributes and their initial values are listed in Table 5-1. A more detailed description of each attribute and the way in which it is used are found in later sections.

Table 5-1. Graphics Attributes

Attribute	Use	Initial Value
Clip	The clip sets the region of the Canvas within which graphics operations have any effect. The clip is discussed in Section 5.7.	Depends on the reason paint( ) was invoked
Color	The color that will be used when drawing or filling shapes or rendering text. See Section 5.3.2 for further details.	Black
Font	The font used when rendering text. Fonts are discussed in Section 5.8.	Set to the platform’s default font
Stroke Style	Determines whether lines, rectangles, and arcs are drawn using solid or dotted strokes, as described in Section 5.4.1.	Set to draw a solid line
Origin	The position of the coordinate point (0, 0) relative to the top left ...