[webkit-dev] How WebCore receives Mouse events?

Mark Rowe mrowe at apple.com
Sat Sep 20 22:16:28 PDT 2008

On Sep 20, 2008, at 9:18 PM, Tau After wrote:

> Hello,
> Could anybody point me the source code where the WebCore register  
> itself with the low layer system to receive the Mouse events? (maybe  
> also key events for elements like buttons)

WebCore doesn't register for mouse events, the WebKit layer takes care  
of passing mouse events down to WebCore when needed.  For example,  
when a button is pressed WebKit on Mac (<http://trac.webkit.org/browser/trunk/WebKit/mac/WebView/WebHTMLView.mm?rev=36685#L3132 
 >) calls into EventHandler::mouseDown (<http://trac.webkit.org/browser/trunk/WebCore/page/mac/EventHandlerMac.mm?rev=36685#L474 
 >), which then calls into the cross-platform  
EventHandler::handleMousePressEvent (<http://trac.webkit.org/browser/trunk/WebCore/page/EventHandler.cpp?rev=36685#L317 
 >).  EventHandler then takes care of the necessary text selection,  
dispatch of DOM events, etc.

Hope this helps,

- Mark

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