canvas_zoom man page on MacOSX

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canvas::zoom(n)		    Variations on a canvas	       canvas::zoom(n)

______________________________________________________________________________

NAME
       canvas::zoom - Zoom control for canvas::sqmap

SYNOPSIS
       package require Tcl  8.4

       package require Tk  8.4

       package require snit

       package require uevent::onidle

       package require canvas::zoom  ?0.2.1?

       ::canvas::zoom pathName ?options?

_________________________________________________________________

DESCRIPTION
       This  package  provides a widget to enable the user of a map display to
       control the zoom level.

API
       ::canvas::zoom pathName ?options?
	      Creates the zoom control widget pathName and configures it.  The
	      methods and options supported by the new widget are described in
	      the following sections.

	      The result of the command is pathName.

   OPTIONS
       -orient
	      The value for this option is  either  vertical,  or  horizontal,
	      specifying  the orientation of the major axis of the widget. The
	      default is vertical.

       -levels
	      The value for this option is a non-negative integer.  It	speciā€
	      fies the number of zoom levels to support.

       -variable
	      The  value for this option is the name of a global or namespaced
	      variable which is connected with the widget. changes to the zoom
	      level  made  the	widget are propagated to this variable, and in
	      turn changes to the variable are imported into the widget.

       -command
	      This option specifies a command prefix. This  callback  will  be
	      invoked  whenever	 the  zoom level is changed. It is called with
	      two additional arguments, the zoom control widget, and  the  new
	      zoom level, in this order.

   METHODS
       The  widget  supports  no methods beyond the standard (configure, cget,
       etc.).

KEYWORDS
       zoom

canvas				     0.2.1		       canvas::zoom(n)
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