Presumably, this was meant to manually scroll the viewer into view when it receives focus. This is already handled by browsers when tabbing to the viewer, so doing it explicitly isn't necessary, and it creates a negative user experience when clicking on a viewer to give it focus (as of #569).
1) MouseTracker - Simulated touchenter/touchleave events now bubble to parent element MouseTrackers
2) MouseTracker - Improved multitouch support in enter/exit event handlers
3) MouseTracker - orphaned tracked touch pointers removed (fix for #539)
4) MouseTracker - removed touchenter/touchleave event support since the events don't exist on any known platform and have been removed from the W3C specification
5) Removed Viewer onContainerPress/onContainerRelease handlers (and the associated 'container-release' event ) that were never fired due to the canvas (child) element capturing the DOM events
6) Added 'canvas-enter', 'canvas-exit', and 'canvas-press' events to Viewer
7) ButtonGroup - removed obsolete MouseTracker event handlers
- Added a option to pass to the OpenSeadragon constructor called homeFillsViewer, which defaults to false. If true, the home button will fill the viewer with the image, centered on the image's center, zoomed to fill the viewer at the image's smallest dimension, and clipped at the image's largest dimension. For example, a very tall, thin image in a 4:3 aspect ratio viewer will zoom so that the width of the image fills the viewer, and most of the height of the image is clipped.
Fix for enhancement #300
Added double-click/tap gesture detection to MouseTracker.with
corresponding dblClickHandler event callback.
Added unit test for double-click detection.
Added Viewer dblClickHandler handling to optionally zoom on
double-click.
Separated event-model/device specific event handling code from
event-model/device agnostic event handling code.
Use enter/leave events instead of over/out events.
Updated unit tests for above changes.
Added unit tests for mouse gestures.
Updated changelog for breaking changes and deprecations.
Removed zoom on click for touch.
Added an isPrimary flag to gesture points.
Fixed documentation error and updated documentation and comments.
Implemented the stopHandler for mouse events.
