OverlayUnidraw

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 extra 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 objects
• AttributeTool/AttributeDialog: mechanism for editing an objects attribute list
• PageDialog, PanDialog, ZoomDialog: dialog boxes for precise page-sizing, panning, and zooming

viewer commands

• CameraMotionCmd (PanCmd, FixedPanCmd, PrecisePanCmd, ZoomCmd, PreciseZoomCmd): pan and zoom commands for the viewer
• ChainViewerCmd, UnchainViewerCmd: commands to chain up pan/zoom of this viewers
• ChainViewersCmd, UnchainViewersCmd: commands to chain up pan/zoom of all viewers
• OvAboutCmd: command to display "about" dialog box
• OvExportCmd, OvImportCmd, OvPrintCmd: commands to invoke export/import/print dialog boxes
• OvNewCompCmd, OvRevertCmd, OvViewCompCmd, OvOpenCmd, OvSaveCompCmd, OvSaveAsCompCmd, OvQuitCmd, OvSlctAllCmd, OvGroupCmd, OvCloseEditorCmd: commands specialized for OverlayUnidraw framework
• PageCmd, PrecisePageCmd: commands to resize the drawing

graphic commands

• ClipPolyAAndBCmd, ClipPolyAMinusBCmd, ClipPolyBMinusACmd: commands to interface to the clippoly library
• FixViewCmd, UnfixViewCmd: commands to fix size and location of a graphic
• HideViewCmd, UnhideViewsCmd: commands to hide/show graphic