CenterCmd,  CloseEditorCmd, GravityCmd, GridCmd, GridSpac-
       ingCmd, NormSizeCmd, OrientationCmd,  RedToFitCmd  -  com-
       mands for modifying editor attributes

SYNOPSIS

       #include <Unidraw/Commands/viewcmds.h>

DESCRIPTION

       The Unidraw library predefines several commands for alter-
       ing the attributes of editors and their viewers.   Center-
       Cmd  centers each of the editor's viewers.  CloseEditorCmd
       closes the editor, removing it from the screen.   Gravity-
       Cmd  turns  gravity on by activating the editor's Gravity-
       Var, if it defines one.  GridCmd toggles the visibility of
       each  viewer's  grid,  while  GridSpacingCmd lets the user
       specify the grid spacing for all  grids.   Finally,  Norm-
       SizeCmd  sets  each  viewer's magnification to a factor of
       one,  OrientationCmd  toggles  each  viewer's  orientation
       between  landscape mode and portrait mode, and RedToFitCmd
       changes each viewer's magnification so that its  component
       view is fully visible.

CENTERCMD PUBLIC OPERATIONS

       CenterCmd(ControlInfo*)
       CenterCmd(Editor* = nil)
              Construct a new CenterCmd.

       virtual void Execute()
              Execute  simply  calls CenterOp on each of the edi-
              tor's viewers.

       virtual boolean Reversible()
              CenterCmd is not reversible.

CLOSEEDITORCMD PUBLIC OPERATIONS

       CloseEditorCmd(ControlInfo*)
       CloseEditorCmd(Editor* = nil)
              Construct a new CloseEditorCmd.

       virtual void Execute()
              Execute calls Close on the  global  unidraw  object
              with  the  CloseEditorCmd's editor as its argument.
              Execute prompts the use to save the component if it
              does  not  appear in any other open editors.  If no
              other editors are open at all, Execute creates  and
              executes a QuitCmd.

       virtual boolean Reversible()
              CloseEditorCmd is not reversible.

GRAVITYCMD PUBLIC OPERATIONS

       GravityCmd(ControlInfo*)
              Construct a new GravityCmd.

       virtual void Execute()
              Execute  calls  Activate on the editor's GravityVar
              (if it defines one) with the inverse of  the  value
              returned by GravityVar's IsActive operation.

       virtual boolean Reversible()
              GravityCmd is not reversible.

GRIDCMD PUBLIC OPERATIONS

       GridCmd(ControlInfo*)
       GridCmd(Editor* = nil)
              Construct a new GridCmd.

       virtual void Execute()
              Execute  calls the Visibility operation on the grid
              from each of the editor's  viewers,  supplying  the
              inverse  of  the value returned by Grid's IsVisible
              oepation.

       virtual boolean Reversible()
              GridCmd is not reversible.

GRIDSPACINGCMD PUBLIC OPERATIONS

       GridSpacingCmd(ControlInfo*)
       GridSpacingCmd(Editor* = nil)
              Construct a new GridSpacingCmd.

       virtual void Execute()
              Execute prompts the user to  specify  grid  spacing
              information through a GridDialog.  If the user does
              not cancel the dialog, then Execute will  pass  the
              specified grid spacing to a SetSpacing call on each
              viewer's grid.

       virtual boolean Reversible()
              GridSpacingCmd is not reversible.

NORMSIZECMD PUBLIC OPERATIONS

       NormSizeCmd(ControlInfo*)
       NormSizeCmd(Editor* = nil)
              Construct a new NormSizeCmd.

       virtual void Execute()
              Execute simply calls SetMagnification with an argu-
              ment of 1 on each of the editor's viewers.

       virtual boolean Reversible()
              NormSizeCmd is not reversible.

ORIENTATIONCMD PUBLIC OPERATIONS

       OrientationCmd(Editor* = nil)
              Construct a new OrientationCmd.

       virtual void Execute()
              Execute  switches  the  orientation  of each of the
              editor's viewers via  their  SetOrientation  opera-
              tion.

       virtual boolean Reversible()
              OrientationCmd is not reversible.

REDTOFITCMD PUBLIC OPERATIONS

       RedToFitCmd(ControlInfo*)
       RedToFitCmd(Editor* = nil)
              Construct a new RedToFitCmd.

       virtual void Execute()
              Execute  simply  calls  ReduceToFit  on each of the
              editor's viewers.

       virtual boolean Reversible()
              RedToFitCmd is not reversible.

SEE ALSO

       BasicDialog(3U),   Command(3U),   Grid(3U),   Unidraw(3U),
       Viewer(3U), catcmds(3U), globals(3U), statevars(3U)