viewcmds(3U)						    InterViews Reference Manual 					      viewcmds(3U)

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 ori-
       entation 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 IsAc-
	      tive 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)

Unidraw 							  24 January 1991						      viewcmds(3U)