imgIContainerObserver

image/public/imgIContainerObserver.idlScriptable

An interface to implement to listen to activities on an imgIContainer object.

1.0

Introduced

Gecko 1.7

Inherits from: nsISupports Last changed in Gecko 12.0 (Firefox 12.0 / Thunderbird 12.0 / SeaMonkey 2.9)

If you wish to listen for activities on an imgIContainer, you should implement the frameChanged() method.

Method overview

void frameChanged(in imgIRequest aRequest, in imgIContainer aContainer, [const] in nsIntRect aDirtyRect); Native code only!

Native code only!

Called when the frame for an image container has changed.

void frameChanged(
  in imgIRequest aRequest,
  in imgIContainer aContainer,
  [const] in nsIntRect aDirtyRect
);

aRequest: The image request for which the change occurred.
aContainer: The image container that changed.
aDirtyRect: A rectangle indicating the portion of the image container that changed.

The aRequest parameter was added to this method in Gecko 12.0 (Firefox 12.0 / Thunderbird 12.0 / SeaMonkey 2.9).