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devguide-17.html
The class Compound
devguide-9.html
The Document and Graphics Classes
devguide-19.html
The Undo Mechanism
The class
Rectangle
The class
Rectangle
represents the drawing primitive of a
parallelogram with optional rounded corners. When drawn interactively
the object is an axis aligned rectangle. After applying affine
transformations the rectangle may not be a rectangle anymore, but it
will remain a parallelogram.
In Skencil, a rectangle is represented by the affine transformation
necessary to map the unit square (opposite corners (0, 0) and (1, 1)),
to the parallelogram. This is an elegant and convenient but also
somewhat unusual representation.
The transformation is of course stored as a
devguide-7.html
transformation object
.
The rounded corners are defined by two floating point numbers
radius1
and
radius2
. Both numbers define a radius of the
ellipses that make up the rounded corners of the unit square,
radius1
defines the horizontal radius and
radius2
the
vertical radius. Valid values lie in the range 0.0 <= radius1,radius2
<= 0.5.
devguide-17.html
The class Compound
devguide-9.html
The Document and Graphics Classes
devguide-19.html
The Undo Mechanism
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