EarseMode command

2012 2 6
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Jan
Jan 2012-2-6

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If a drawn line is deleted, the remaining figure can be re-drawn in different ways:
  • 'normal': The figure is re-drawn from scratch without the deleted line. This is accurate, but time-consuming.
  • 'none': The deleted line is not removed from the figure actively. This is fast, but of course the line does not vanish before the figure is redrawn manually, e.g. by refresh.
  • 'xor': The line pixels are xor'ed. For overlapping objects this does not delete the line accurately.
  • 'background': Replace line pixels by the background color. This removes pixels of objects under the drawn line also.
Adding graphic objects with 'EraseMode' set to 'none' does not trigger a redrawing of the scene. This can help to avoid flickering in animations.

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