Package pyraf :: Module gki :: Class GkiBuffer

Class GkiBuffer

implement a buffer for gki which allocates memory in blocks so that a new memory allocation is not needed everytime metacode is appended

Instance Methods

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__init__(self, metacode=None)

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init(self, metacode=None)
Initialize to empty buffer or to metacode

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prepareToRedraw(self)
Reset pointers in preparation for redraw

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reset(self, last=0)
Discard everything up to end pointer

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split(self)
Split this buffer at nextTranslate and return a new buffer object with the rest of the metacode.

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append(self, metacode, isUndoable=0)
Append metacode to buffer

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isUndoable(self)
Returns true if there is anything to undo on this plot

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undoN(self, nUndo=1)
Undo last nUndo edits and replot.

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isRedoable(self)
Returns true if there is anything to redo on this plot

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redoN(self, nRedo=1)
Redo last nRedo edits and replot.

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get(self)
Return buffer contents (as numpy array, even if empty)

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delget(self, last=0)
Return buffer up to end pointer, deleting those elements

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getNextCode(self)
Read next opcode and argument from buffer, returning a tuple with (opcode, arg).

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__len__(self)

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__getitem__(self, i)

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__getslice__(self, i, j)

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Class Variables

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INCREMENT = 50000

Method Details

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reset(self, last=0)

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Discard everything up to end pointer

End is lastTranslate if last is true, else nextTranslate

split(self)

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Split this buffer at nextTranslate and return a new buffer object with the rest of the metacode. lastOpcode may be removed if it triggered the buffer split (so we can append more metacode later if desired.)

undoN(self, nUndo=1)

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Undo last nUndo edits and replot. Returns true if plot changed.

redoN(self, nRedo=1)

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Redo last nRedo edits and replot. Returns true if plot changed.

delget(self, last=0)

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Return buffer up to end pointer, deleting those elements

End is lastTranslate if last is true, else nextTranslate

getNextCode(self)

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Read next opcode and argument from buffer, returning a tuple with (opcode, arg). Skips no-op codes and illegal codes. Returns (None,None) on end of buffer or when opcode is truncated.