public Transition GenerateNextTransition(RectF drawableBounds, RectF viewport)
{
bool firstTransition = _mLastGenTrans == null;
bool drawableBoundsChanged = true;
bool viewportRatioChanged = true;
RectF srcRect = null;
RectF dstRect = null;
if (!firstTransition)
{
dstRect = _mLastGenTrans.GetDestinyRect();
drawableBoundsChanged = !drawableBounds.Equals(_mLastDrawableBounds);
viewportRatioChanged = !MathUtils.HaveSameAspectRatio(dstRect, viewport);
}
if (dstRect == null || drawableBoundsChanged || viewportRatioChanged)
{
srcRect = GenerateRandomRect(drawableBounds, viewport);
}
else
{
/* Sets the destiny rect of the last transition as the source one
if the current drawable has the same dimensions as the one of
the last transition. */
srcRect = dstRect;
}
dstRect = GenerateRandomRect(drawableBounds, viewport);
_mLastGenTrans = new Transition(srcRect, dstRect, _mTransitionDuration,
_mTransitionIInterpolator);
_mLastDrawableBounds = drawableBounds;
return _mLastGenTrans;
}
