OverlayUnidraw is a library that extends the Unidraw framework in several ways -- double-buffered rendering, a spatial object save/restore mechanism (with attributes), improved export/import, multiple-views with optional pan/zoom chaining, fixed size graphics, etc..
OverlayComp extends the GraphicComp class of Unidraw with mechanisms for serialization and graphics rendering.
Here is a list of the more important derived classes and what they do:
overall framework objects
OverlayEditor/OverlayKit: editor uses kit with virtual functions to construct itself
OverlayViewer: double-buffered viewer
OverlayDamage: double-buffered damage repair
OverlayCreator/OverlayCatalog: specialized save/restore mechanism
generic graphic objects
OverlayComp (OverlayView/OverlayScript/OverlayPS): specialized versions of GraphicComp, GraphicView, and PostScriptView
OverlaysComp (OverlaysView/OverlaysScript/OverlaysPS): composite graphic mechanism
OverlayIdrawComp (OverlayIdrawView/OverlayIdrawScript/OverlayIdrawPS): top level graphic
OverlayFileComp (OverlayFileView/OverlayFileScript/OverlaysPS): mechanism for creating hierarchical drawings
VerticesOvComp (VerticesOvView/VerticesScript/VerticesPS): graphics with arbitrary number of vertices
specific graphic objects
ClosedSplineOvComp (ClosedSplineOvView/ClosedSplineScript/ClosedSplinePS): closed B-splines
EllipseOvComp (EllipseOvView/EllipseScript/EllipsePS): ellipses
LineOvComp (LineOvView/LineScript/LinePS): lines
MultiLineOvComp (MultiLineOvView/MultiLineScript/MultiLinePS): multilines
PolygonOvComp (PolygonOvView/PolygonScript/PolygonPS): polygons
RasterOvComp (RasterOvView/RasterScript/RasterPS): TIFF, PGM, or PPM images
RectOvComp (RectOvView/RectScript/RectPS): rectangles
SplineOvComp (SplineOvView/SplineScript/SplinePS): open B-splines
StencilOvComp (StencilOvView/StencilScript/StencilPS): XBM or PBM bitmaps
TextFileComp (TextFileView/TextFileScript/TextPS): text from a file
TextOvComp (TextOvView/TextScript/TextPS): text strings
specific graphic objects with arrowheads
ArrowLineOvComp (ArrowLineOvView/ArrowLineScript/ArrowLinePS): lines with arrowheads
ArrowMultiLineOvComp (ArrowMultiLineOvView/ArrowMultiLineScript/ArrowMultiLinePS): multilines with arrowheads
ArrowSplineOvComp (ArrowSplineOvView/ArrowSplineScript/ArrowSplinePS): open B-splines with arrowheads
tools and dialog boxes
AnnotateTool/AnnotateDialog: mechanism for annotating objectsAttributeTool/AttributeDialog: mechanism for editing an objects attribute listPageDialog, PanDialog, ZoomDialog: dialog boxes for precise page-sizing, panning, and zoomingviewer commands
CameraMotionCmd (PanCmd, FixedPanCmd, PrecisePanCmd, ZoomCmd, PreciseZoomCmd): pan and zoom commands for the viewerChainViewerCmd, UnchainViewerCmd: commands to chain up pan/zoom of this viewersChainViewersCmd, UnchainViewersCmd: commands to chain up pan/zoom of all viewersOvAboutCmd: command to display "about" dialog boxOvExportCmd, OvImportCmd, OvPrintCmd: commands to invoke export/import/print dialog boxesOvNewCompCmd, OvRevertCmd, OvViewCompCmd, OvOpenCmd, OvSaveCompCmd, OvSaveAsCompCmd, OvQuitCmd, OvSlctAllCmd, OvGroupCmd, OvCloseEditorCmd: commands specialized for OverlayUnidraw framework
PageCmd, PrecisePageCmd: commands to resize the drawinggraphic commands
ClipPolyAAndBCmd, ClipPolyAMinusBCmd, ClipPolyBMinusACmd: commands to interface to the clippoly libraryFixViewCmd, UnfixViewCmd: commands to fix size and location of a graphicHideViewCmd, UnhideViewsCmd: commands to hide/show graphicLast modified: Fri Jan 15 13:40:16 PST 1999