arc_class (library)

Author(s): Montserrat Urraca.

Version: 1.11#222 (2004/5/24, 13:8:7 CEST)

Version of last change: 1.9#120 (2003/12/4, 17:32:15 CET)

• Usage and interface (arc_class)
• Documentation on exports (arc_class)

Usage and interface (arc_class)

Documentation on exports (arc_class)

PREDICATE: coord/4:

Usage: coord(X1, Y1, X2, Y2)

• Description: X1, Y1, X2, and Y2 give the coordinates of two diagonally opposite corners of a rectangular region enclosing the oval that defines the arc.
• Call and exit should be compatible with: X1 is an integer. (basic_props:int/1) Y1 is an integer. (basic_props:int/1) X2 is an integer. (basic_props:int/1) Y2 is an integer. (basic_props:int/1)
• The following properties should hold at call time: X1 is currently a term which is not a free variable. (term_typing:nonvar/1) Y1 is currently a term which is not a free variable. (term_typing:nonvar/1) X2 is currently a term which is not a free variable. (term_typing:nonvar/1) Y2 is currently a term which is not a free variable. (term_typing:nonvar/1)

PREDICATE: width/1:

Usage 1: width(Width)

• Description: Specifies shape's Width.
• Call and exit should be compatible with: Width is an integer. (basic_props:int/1)
• The following properties should hold at call time: Width is currently a term which is not a free variable. (term_typing:nonvar/1)

Usage 2: width(Width)

• Description: Gets shape's Width.
• Call and exit should be compatible with: Width is an integer. (basic_props:int/1)
• The following properties should hold at call time: Width is a free variable. (term_typing:var/1)

PREDICATE: height/1:

Usage 1: height(Height)

• Description: Specifies shape's Height.
• Call and exit should be compatible with: Height is an integer. (basic_props:int/1)
• The following properties should hold at call time: Height is currently a term which is not a free variable. (term_typing:nonvar/1)

Usage 2: height(Height)

• Description: Gets shape's Height.
• Call and exit should be compatible with: Height is an integer. (basic_props:int/1)
• The following properties should hold at call time: Height is a free variable. (term_typing:var/1)

PREDICATE: center/2:

Usage 1: center(X, Y)

• Description: Specifies shape's center with X and Y.
• Call and exit should be compatible with: X is an integer. (basic_props:int/1) Y is an integer. (basic_props:int/1)
• The following properties should hold at call time: X is currently a term which is not a free variable. (term_typing:nonvar/1) Y is currently a term which is not a free variable. (term_typing:nonvar/1)

Usage 2: center(X, Y)

• Description: Gets shape's center with X and Y.
• Call and exit should be compatible with: X is an integer. (basic_props:int/1) Y is an integer. (basic_props:int/1)
• The following properties should hold at call time: X is a free variable. (term_typing:var/1) Y is a free variable. (term_typing:var/1)

PREDICATE: angle_start/1:

Usage 1: angle_start(Angle)

• Description: Angle specifies the beginning of the angular range occupied by the arc. Degrees are given in units of degrees measured counter-clockwise from the 3-o'clock position; it may be either positive or negative.
• Call and exit should be compatible with: Angle is an integer. (basic_props:int/1)
• The following properties should hold at call time: Angle is currently a term which is not a free variable. (term_typing:nonvar/1)

Usage 2: angle_start(Angle)

• Description: Gets the value of the Angle.
• Call and exit should be compatible with: Angle is an integer. (basic_props:int/1)
• The following properties should hold at call time: Angle is a free variable. (term_typing:var/1)

PREDICATE: style_type/1:

Usage 1: style_type(Style)

• Description: Style specifies how to draw the arc. If type is pieslice (the default) then the arc's region is defined by a section of the oval's perimeter plus two line segments, one between the center of the oval and each end of the perimeter section. If type is chord then the arc's region is defined by a section of the oval's perimeter plus a single line segment connecting the two end points of the perimeter section. If type is arc then the arc's region consists of a section of the perimeter alone. In this last case the -fill option is ignored.
• Call and exit should be compatible with: Style is currently instantiated to an atom. (term_typing:atom/1)
• The following properties should hold at call time: Style is currently a term which is not a free variable. (term_typing:nonvar/1)

Usage 2: style_type(Style)

• Description: Gets the Style of the arc.
• Call and exit should be compatible with: Style is currently instantiated to an atom. (term_typing:atom/1)
• The following properties should hold at call time: Style is a free variable. (term_typing:var/1)

PREDICATE: outline_color/1:

Usage 1: outline_color(Color)

• Description: Color specifies the color used for drawing the arc's outline. This option defaults to black.
• Call and exit should be compatible with: Color is currently instantiated to an atom. (term_typing:atom/1)
• The following properties should hold at call time: Color is currently a term which is not a free variable. (term_typing:nonvar/1)

Usage 2: outline_color(Color)

• Description: It gets arc's outline Color.
• Call and exit should be compatible with: Color is currently instantiated to an atom. (term_typing:atom/1)
• The following properties should hold at call time: Color is a free variable. (term_typing:var/1)

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