111 lines
2.9 KiB
Scheme
111 lines
2.9 KiB
Scheme
; Test methods of selection class of the PDB
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; setup
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(define testImage (car (pika-image-new 21 22 RGB)))
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; get-selection yields an ID.
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; Image always yields a selection object.
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; It is a singleton.
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(define testSelection (car (pika-image-get-selection testImage)))
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; The returned ID is-a Selection
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(assert `(= (car (pika-item-id-is-selection ,testSelection))
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1))
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; !!! Note there is little use for a Selection instance.
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; There are no methods on the class per se i.e. taking the instance ID.
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; Except for methods on the superclass Item of subclass Selection.
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;
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; Instead the methods seem to be on an image.
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; Its not clear whether changing the selection in an image
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; also changes the singleton Selection instance,
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; and there is no way of knowing, since the Selection instance
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; has no methods.
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; selection on new image is empty
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; !!! Requre no prior test on this image selected
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; !!! Arg is the image, not the selection object instance.
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(assert `(= (car (pika-selection-is-empty ,testImage))
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1))
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; selection bounds yields (1 0 0 21 22)
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; First element of tuple is 0 (false)
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; indicates user or program has not made selection
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(assert `(= (car (pika-selection-bounds ,testImage))
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0))
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; selection bounds equal bounds of image
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(assert `(equal? (cdr (pika-selection-bounds ,testImage))
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'(0 0 21 22)))
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; select all and none
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; select all succeeds
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(assert `(pika-selection-all ,testImage))
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; !!! A selection operation does not create a new selection object
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; i.e. ID is the same.
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; get-selection yields same singleton on image
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(assert `(= (car (pika-image-get-selection ,testImage))
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,testSelection))
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; after select all, selection bound indicates selection created
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(assert `(= (car (pika-selection-bounds ,testImage))
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1))
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; and now is-empty is false
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(assert `(= (car (pika-selection-is-empty ,testImage))
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0))
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; clear and none are the synonyms
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; clear does not invalidate a prior selection object
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; i.e. get-selection returns same ID
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; clear makes selection bounds equal entire image
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; TODO
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; select none succeeds
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(assert `(pika-selection-none ,testImage))
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; effective: is-empty is true
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(assert `(= (car (pika-selection-is-empty ,testImage))
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1))
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; same singleton on image exists
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(assert `(= (car (pika-image-get-selection ,testImage))
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,testSelection))
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; misc selection operations
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; pika-selection-value
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; change selection to totally new selection
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; Not a function of existing selection, by color or shape.
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;pika-image-select-color
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; ,testImage
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; CHANNEL-OP-ADD
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; drawable
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; "red")
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; pika-image-select-contiguous-color
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; ellipse
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; polygon
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; rectangle
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; round-rectangle
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; pika-selection-float is tested elsewhere
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; It is not an op on the selection, but an op on the image that uses the selection.
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; See pika-image-floating-selection |
