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image(n)                                    Tk Built-In Commands                                    image(n)



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NAME
       image - Create and manipulate images

SYNOPSIS
       image option ?arg arg ...?
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DESCRIPTION
       The  image command is used to create, delete, and query images.  It can take several different forms,
       depending on the option argument.  The legal forms are:

       image create type ?name? ?option value ...?
              Creates a new image and a command with the same name and returns its name.  type specifies the
              type  of  the  image,  which  must be one of the types currently defined (e.g., bitmap).  name
              specifies the name for the image;  if it is omitted then Tk picks a name of the  form  imagex,
              where  x is an integer.  There may be any number of option-value pairs, which provide configu-ration configuration
              ration options for the new image.  The legal set of options is  defined  separately  for  each
              image  type;   see  below  for  details  on the options for built-in image types.  If an image
              already exists by the given name then it is replaced with the new image and any  instances  of
              that  image will redisplay with the new contents.  It is important to note that the image com-mand command
              mand will silently overwrite any procedure that may currently be defined by the given name, so
              choose  the name wisely.  It is recommended to use a separate namespace for image names (e.g.,
              ::img::logo, ::img::large).

       image delete ?name name ...?
              Deletes each of the named images and returns an empty string.  If there are instances  of  the
              images  displayed  in  widgets,  the  images  will  not  actually  be deleted until all of the
              instances are released.  However, the association between the instances and the image  manager
              will be dropped.  Existing instances will retain their sizes but redisplay as empty areas.  If
              a deleted image is recreated with another call to image create, the  existing  instances  will
              use the new image.

       image height name
              Returns a decimal string giving the height of image name in pixels.

       image inuse name
              Returns  a  boolean  value  indicating whether or not the image given by name is in use by any
              widgets.

       image names
              Returns a list containing the names of all existing images.

       image type name
              Returns the type of image name (the value of the type argument to image create when the  image
              was created).

       image types
              Returns  a  list whose elements are all of the valid image types (i.e., all of the values that
              may be supplied for the type argument to image create).

       image width name
              Returns a decimal string giving the width of image name in pixels.

       Additional operations (e.g. writing the image to a file) may be available as subcommands of the image
       instance command. See the manual page for the particular image type for details.

BUILT-IN IMAGE TYPES
       The  following  image types are defined by Tk so they will be available in any Tk application.  Indi-vidual Individual
       vidual applications or extensions may define additional types.

       bitmap Each pixel in the image displays a foreground color, a background color, or nothing.  See  the
              bitmap manual entry for more information.

       photo  Displays  a  variety  of  full-color images, using dithering to approximate colors on displays
              with limited color capabilities.  See the photo manual entry for more information.


SEE ALSO
       bitmap(n), options(n), photo(n)


KEYWORDS
       height, image, types of images, width



Tk                                                   4.0                                            image(n)