[bug #20057] rotated+translated text fields display incorrectly

[Fred Kiefer]

Follow-up Comment #9, bug #20057 (project gnustep):

Last summer I made some more progress not documented here an I was even able
to reproduce the behaviour cited below. Still more complex combination of
rotation and translation where still wrong. 
Now I am trying to get an application working that has views rotated by 90
degrees and this completely fails.

After experimenting on my Apple I came up with code that works somewhat
better, but it still isn't completely correct. It looks like the code would be
simpler when implementing setBoundsOrigin: based on translateOriginToPoint:.

I put the code here for future reference:

- (void) setBoundsOrigin: (NSPoint)newOrigin
{
  if (_is_rotated_from_base)
    {
      NSAffineTransform *matrix;
      NSRect frame = _frame;
      NSPoint offset;

      frame.origin = NSMakePoint(0, 0);
      if (_coordinates_valid)
        {
          (*invalidateImp)(self, invalidateSel);
        }
      if (_boundsMatrix == nil)
        {
          _boundsMatrix = [NSAffineTransform new]; 
          offset = NSMakePoint(NSMinX(_bounds), NSMinY(_bounds));
        }
      else
        {
          matrix = [_boundsMatrix copy];
          [matrix invert];
          offset = [matrix transformPoint: NSMakePoint(0, 0)];
          RELEASE(matrix);
      }
      NSLog(@"Translate by %g, %g", -newOrigin.x + offset.x, -newOrigin.y +
offset.y);
      [_boundsMatrix translateXBy: -newOrigin.x + offset.x
                     yBy: -newOrigin.y + offset.y];      
//      [_boundsMatrix setFrameOrigin: NSMakePoint(-newOrigin.x,
-newOrigin.y)];

     // Adjust bounds
      matrix = [_boundsMatrix copy];
      [matrix invert];
      [matrix boundingRectFor: frame result: &_bounds];
      RELEASE(matrix);
      [self resetCursorRects];
      if (_post_bounds_changes)
        {
          [nc postNotificationName: NSViewBoundsDidChangeNotification
              object: self];
        }
    }
  else if (NSEqualPoints(_bounds.origin, newOrigin) == NO)
    {
      if (_coordinates_valid)
        {
          (*invalidateImp)(self, invalidateSel);
        }
      _bounds.origin = newOrigin;
      if (_boundsMatrix == nil)
        {
          _boundsMatrix = [NSAffineTransform new]; 
        }
      [_boundsMatrix setFrameOrigin: NSMakePoint(-newOrigin.x,
-newOrigin.y)];
      [self resetCursorRects];
      if (_post_bounds_changes)
        {
          [nc postNotificationName: NSViewBoundsDidChangeNotification
              object: self];
        }
    }
}

- (void) translateOriginToPoint: (NSPoint)point
{
  NSPoint offset;
   
  if (_boundsMatrix == nil)
    {
      offset = NSMakePoint(NSMinX(_bounds), NSMinY(_bounds));
    }
  else
    {
      NSAffineTransform *matrix;
      NSRect frame = _frame;

      frame.origin = NSMakePoint(0, 0);
      matrix = [_boundsMatrix copy];
      [matrix invert];
      offset = [matrix transformPoint: NSMakePoint(0, 0)];
      RELEASE(matrix);
    }
   
  [self setBoundsOrigin: NSMakePoint(offset.x - point.x, 
                                     offset.y - point.y)];
//  [self setBoundsOrigin: NSMakePoint(NSMinX(_bounds) - point.x, 
//                                   NSMinY(_bounds) - point.y)];
}


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