Agree as well! This would make for a great plugin. If there are things in Java-land that aren't exposed to plugins that you need in order to make this work, then we should change core to make them exposed.
On Thu, Apr 18, 2013 at 1:44 PM, Jesse <purplecabb...@gmail.com> wrote: > Yes, it may have value. Consider writing a plugin. > The pointer events spec[1] may be of interest, as things like > tap/slide/pinch are all non-standard. > I did this exact same thing [2] for Windows Phone 7, as there aren't even > mouse events. > There are numerous things you need to be aware of when creating the event, > like the current zoom/scale of the page, + any panning, scrolling, css3 > translations. > You also need to consider the way all DOM events bubble from the element to > the document and back up. > IMHO, Implementing this correctly is not for the faint of heart, and your > work may be negated at any time by a new browser. > > Cheers, > Jesse > > [1] > http://www.w3.org/TR/pointerevents/ > [2] > > https://github.com/purplecabbage/cordova-wp7/blob/master/templates/standalone/cordovalib/BrowserMouseHelper.cs > > > @purplecabbage > risingj.com > > > On Thu, Apr 18, 2013 at 10:08 AM, jbo...@openmv.com <jbo...@openmv.com > >wrote: > > > On the short them, it would help solve 'Android fragmentation' problems: > > > > > https://github.com/android/platform_frameworks_base/blob/android-cts-4.0.3_r2/core/java/android/webkit/WebView.java#L6044 > > > > > > > https://github.com/android/platform_frameworks_base/blob/master/core/java/android/webkit/WebViewClassic.java#L5824 > > > > Android doesn't exactly pass the touchstart etc.. events to webkit the > > same way and more importantly with the same delays. Not to mention, some > > versions have bugs (missing touchend, touchmove events). > > If coding a pure HTML/javascript app, you can avoid the 'native' > onTouch() > > processing and pass events faster to your app. > > > > It's an educated guess at the moment, but I'm quite sure performance / > > response time for the user on all platforms will be better if the gesture > > detection is done on the native side. > > > > On the long term, I don't see how JavaScript libraries would allow > (within > > reasonable ms) for more complex 'gesture' detection. I would rather do > > something like: > > webView.addGesture('swipe'); > > webView.addGesture('handgrab'); > > onTouch/Gesture: > > // do gesture detection in native code > > webView.sendJavascript("cordova.fireEvent('handgrab', {node, ...}"); > > > > > > -----Original Message----- > > From: Filip Maj [mailto:f...@adobe.com] > > Sent: Wednesday, April 17, 2013 12:47 PM > > To: dev@cordova.apache.org > > Subject: Re: Standardized gestures > > > > I'm not convinced you need any additional code here. > > > > Touch events are already fired by the web view containers. You could > build > > up gesture detection in JavaScript by listening to these events. > > > > There are libraries out there that do this for you already: > > > > - http://eightmedia.github.io/hammer.js/ > > - http://quojs.tapquo.com/ > > - https://github.com/plainview/Jester > > - jquery ui plugin: http://touchpunch.furf.com/ > > - jquery plugin: http://labs.rampinteractive.co.uk/touchSwipe/demos/ > > - moar jquery: https://github.com/HotStudio/touchy > > > > On 4/17/13 9:42 AM, "jbo...@openmv.com" <jbo...@openmv.com> wrote: > > > > >I'm experimenting with Cordova on Android, iOS and Windows 8. > > > > > >Has there been a discussion around trying to implement to set of > > >'standard' gesture recognizers: > > >http://msdn.microsoft.com/library/windows/apps/BR241937 > > >http://developer.apple.com/library/ios/#documentation/EventHandling/Con > > >cep > > >tual/EventHandlingiPhoneOS/GestureRecognizer_basics/GestureRecognizer_b > > >asi > > >cs.html > > >http://developer.android.com/reference/android/view/GestureDetector.htm > > >l > > > > > >The idea would be that the native side executes JavaScript like: > > >javascript:cordova.fireEvent('tap', {node: > > >document.elementFromPoint(400, 300), x: 400, y:300 }); > > >javascript:cordova.fireEvent('slide', {node: > > >document.elementFromPoint(400, 300), x: 400, y:300}); > > > > > >This function could use document.createEvent to initiate events on the > > >DOM node: > > >https://developer.mozilla.org/en-US/docs/DOM/document.createEvent > > > > > >The purpose of this would be to have a consistent set of gesture > > >recognition across different devices instead of having javascript code > > >in the 'WebView' trying to do gesture detection. > > > > > >Thoughts? > > > > > > > > > > > >
