1. 16 Jun, 2017 1 commit
    • Dmitry Kazakov's avatar
      Implement KoShape::updateAbsolute() for complex transformation updates · 6f51599f
      Dmitry Kazakov authored
      Historically, transformation code uses extremely weird method of shape
      updates that rely on the event loop. This patch implements a framework
      for moving away from this strategy.
      
      The problem:
      
      When one transforms a shape he needs to update both areas: bounding
      rect of the shape *before* the transform and a bounding rect of the shape
      *after* the transform. Before the patch, the transformation code used the
      system like that:
      
      shape->update();
      shape->setTransformation(newTransform);
      shape->update();
      
      That works only with assumption that the first update() call will *not*
      be executed before setTransform() call. That should be true atm, but it
      is not guaranteed to be so in the future. Therefore, now the update happens
      like that:
      
      const QRectF oldDirtyRect = shape->boundingRect();
      shape->setTransformation(newTransform);
      shape->updateAbsolute(oldDirtyRect | shape->boundingRect());
      6f51599f
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