NAME

       CenterCmd,    CloseEditorCmd,    GravityCmd,    GridCmd,    GridSpacingCmd,   NormSizeCmd,
       OrientationCmd, RedToFitCmd - commands for modifying editor attributes

SYNOPSIS

       #include <Unidraw/Commands/viewcmds.h>

DESCRIPTION

       The Unidraw library predefines several commands for altering the attributes of editors and
       their viewers.  CenterCmd centers each of the editor's viewers.  CloseEditorCmd closes the
       editor, removing it from the screen.   GravityCmd  turns  gravity  on  by  activating  the
       editor's  GravityVar,  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,
       NormSizeCmd  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 editor'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*)
       GravityCmd(Editor* = nil)
              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 argument of 1 on each of the editor's
              viewers.

       virtual boolean Reversible()
              NormSizeCmd is not reversible.

ORIENTATIONCMD PUBLIC OPERATIONS

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

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

       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)