LazRegions unit

lazregions.pas contains classes, types, and routines used to implement clipping regions in TLazCanvas, and regions used in custom-drawn LCL controls.

Author: Felipe Monteiro de Carvalho

Classes and records

TLazRegion	class	Represents a custom region in the Lazarus LCL.
TLazRegionEllipse	class	Implements a region defined as an Ellipse.
TLazRegionPart	class	Base class used for rectangular areas in a region.
TLazRegionPolygon	class	Represents a region defined as a series of vertices for a polygon.
TLazRegionRect	class	Implements a region defined by a TRect structure.
TLazRegionWithChilds	class	Implement a region which can have other regions as children.

Procedures and functions

IsPointInPolygon

function

Determines if the specified point is inside the vertices for the specified polygon.

Types

TLazRegionFillMode	enumeration	Represents region fill modes used for polygons in Lazarus regions.
TPointArray	type	Defines an array type used for TPoint values.

Uses

• Classes
• SysUtils
• fpcanvas
• LCLType
• GraphType