c# - Touch input and direct manipulation -


i listening several events handle touch input in windows (phone) 8.1 runtime code. works long no scrollviewer involved. scrollviewer swallows gesture events due direct manipulation.

here events listen (view frameworkelement):

        var cw = window.current.corewindow;         cw.pointerpressed += onpointerpressed;         cw.pointermoved += onpointermoved;         cw.pointerreleased += onpointerreleased;         cw.pointercapturelost += onpointercapturelost;          view.tapped += ontap;         view.doubletapped += ondoubletap;         view.holding += onhold;         view.manipulationdelta += onmanipulationdelta;         view.manipulationcompleted += onmanipulationcompleted;

as scrollviewer recognizes tap, pointercapturelost , no other event handlers called anymore.

rob caplan wrote in 2013:

unfortunately there no solution if app needs both scrolling , gestures (for example, detect crossslides against scrolling). in case option pointer messages everywhere disable direct manipulation everywhere, disables scrolling well. app need detect scrolling gestures , navigate scrollviewer new location scrolltohorizontaloffset or scrolltoverticaloffset or updating selectedindex. tricky , noticeably slower letting scrollviewer thing. should avoided if @ possible.

has changed in meantime? know sample that?

i writing abstraction transforms gesture events different events. user can place controls in , don't know, may it. cannot slow down gesture events.

are there other controls beside scrollviewer behave similarly?

can windows.ui.input.gesturerecognizer help? uielement provides events need, didn't try - , don't understand why should.

why not use transparent layer above scrollviewer , forward events (either after first having done processing, or waiting process them first, remembering ones act on them afterwards too)?


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