Hi, Let me share with you whatever little I am aware of.
When you try to scroll, the event first reaches to Glue layer(webview/webpage) & from there It goes to WebCore inside through ScrollView & FrameView & then finally it lands up to Chrome::scroll. And then m_client->scroll calls ChromeClientGTK::scroll. Please let me know if you want to know anything further details. #1> delta always signifies how much size you have scrolled (width & height) & moveRect means how much area(size) have been scrolled [from this line gdk_rectangle_intersect(&area, &sourceRect, &moveRect)] #2>Normally I have seen rectToScroll & clipRect are as same as your default Viewport area. Say it is 200 px width & delta.width=50 Then moverect.width = 150 (how much rect area is scrolled) & similarly for height. Let me know if this brief info was of any help. Thanks. On Fri, Apr 29, 2011 at 11:49 AM, Corey Fu <[email protected]> wrote: > Hi ! > Someone can help! > When I drag the scroll, how does ChromeClient::scroll work? and I also > have two questions: > 1. What do "delta" and "moveRect" mean in function ChromeClient::scroll in > WebKit/gtk/WebCoreSupport/ChromeClientGtk.c? > 2. What the difference between delta.width(),delta.height() and > moveRect.width, moveRect.height? > > _______________________________________________ > webkit-dev mailing list > [email protected] > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > >
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