03 Internal classes

ReportLib uses the following classes internally to calculate sizes and positions of frames.

The class Rect

The library uses this class to calculate rectangles regarding margins, paddings, or alignments. One function uses the current rectangle as a basis to calculate a rectangle that have added the margins on all four sides. Another function does the opposite thing and subtracts the paddings from current rectangle to calculate an inner rectangle.

The class Size

This class represents a rectangular space with a width and a height independent of a position. The library uses it to hold calculated sizes of frames.

The class SizeState

This class holds the current state of a frame during the calculation of sizes and positions. It contains a required size and if the remaining space on a page is big enough for the frame.