# qooxdoo

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# The Event Layer

The class qx.event.Manager provides a per-document wrapper for cross-browser DOM event handling. The implementation of the event layer is inside the qx.event namespace.

The following features work in all supported browsers:

- Canceling events: `stopPropagation()`
- Skipping the browser's default behavior: `preventDefault()`
- Unified event objects matching the W3C DOM 2 event interface
- Cross-browser event bubbling and capturing phase, even in Internet Explorer
- Mouse event capturing
- Port of the unified qooxdoo 0.7 key event handler to the 1.2 low-level layer. For a full list of available key identifiers see the getKeyIdentifier() method documentation of the `qx.event.type.KeySequence` class.
- Unified mouse events
  - Normalized double click event sequence `mousedown` -> `mouseup` -> `click` -> `mousedown` -> `mouseup` -> `click` -> `doubleclick` in Internet Explorer
  - Normalized right click sequence `mousedown` -> `mouseup` -> `contextmenu` in Safari 3 and Opera.
  - Always fire `click` events if the `mouseup` happens on a different target than the corresponding `mousedown` event. Natively only Internet Explorer behaves like that.

## UML Class Diagram