An Introduction to the Vector Classes

There are four Vector classes in the class library to be used with vector data:

LVectorBase

Basic methods for working with vectors, including:

• Load

• Save

• Translate

• Rotate

• Scale

• Paint

• Selecting objects

• Palettes

• Set/Get Viewport

• Set/Get Pan

• Set/Get Camera

• Image conversion (WMF, EMF)

LVectorDialog

Vector common dialogs for vector manipulation, including:

• Vector rotation

• Vector translation

• Vector scaling

• Methods for getting/setting common dialog entries

LVectorFile

Methods for working with vector files, including

• Loading from a file

• Saving to a file

• Loading from a buffer, where you control the input stream

LVectorGroup

Methods for working with vector groups, including

• Adding an object

• Deleting groups

• Emptying a group

• Enumerating objects in groups

• Getting/Setting group information

• Setting the vector

LVectorLayer

Vector layer functions for working with vector layers, including:

• Creating

• Enumerating objects

• Deleting layers

• Emptying layers

• Getting/setting layer information

• Adding objects

• Getting an object count

LVectorMemoryFile

• Methods for working with files in memory, including:

• Loading from a memory file

• Saving to a file in memory

To see how these fit in the Class library hierarchy, refer to the Class Hierarchy Chart.

LVectorObject

Vector object functions for working with vector objects, including:

• Creating

• Getting/setting object information

• Exploding objects

• Getting bounding rectangles and parallelograms

• Rotating

• Scaling

• Translating

• Deleting

• Manipulating the properties of derived class objects including:

  • LVectorArc
  • LVectorChord
  • LVectorCircle
  • LVectorClone
  • LVectorEllipse
  • LVectorEllipticalArc
  • LVectorHPolyezier
  • LVectorLine
  • LVectorPie
  • LVectorPolyBezier
  • LVectorPolyDraw
  • LVectorPolygon
  • LVectorPolyLine
  • LVectorRaster
  • LVectorRectangle
  • LVectorSpline
  • LVectorText
  • LVectorVertex
  • LVectorWindow

Vector window functions for working with vectors, including:

• Loading

• Zooming

• Scrolling

• Panning

• Scaling

• Painting

• Selecting Objects

LVectorStock

Dynamic Link Libraries containing user-defined objects. This class provides support for creating and managing vector stock objects.