image(n) Tk Built-In Commands image(n)
image - Create and manipulate images
image option ?arg arg ...?
The image command is used to create, delete, and query images. It can take several dif-
ferent 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 pro-
vide 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.
It is important to note that the image command will silently overwrite any proce-
dure 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,
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.
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).
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 applica-
tion. Individual applications or extensions may define additional types.
bitmap Each pixel in the image displays a foreground color, a background color, or noth-
ing. 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
height, image, types of images, width
Tk 4.0 image(n)