image(n) Tk Built-In Commands image(n)_________________________________________________________________NAMEimage - Create and manipulate images
SYNOPSISimage option ?arg arg ...?
_________________________________________________________________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 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 configuration
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.
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 won't 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 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
Tk 4.0 1
image(n) Tk Built-In Commands image(n)
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.
BUILT-IN IMAGE TYPES
The following image types are defined by Tk so they will
be available in any Tk application. Individual applica-
tions 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.
KEYWORDS
height, image, types of images, width
Tk 4.0 2