942760 - Click target seems off by a few hundred pixels

Status: RESOLVED DUPLICATE of bug 941215

(Core :: Panning and Zooming, defect)

Description

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

With APZ turned on the clicks target are sometimes off into some Gaia apps.

Steps to reproduce:
 - Open the Settings app
 - pan to the bottom of the main panel
 - try to click on 'Help'

Expected result:
 - The 'Help' panel is opened

Actual result:
 - Nothing happens. I need to click the 'USB Storage panel' to open the 'Help' panel

Comment 1

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

hmm. Seems like I can't repro anymore with <meta name="viewport" content="width=device-width, height=device-height, minimum-scale=1, initial-scale=1">.

Not sure why.

Comment 2

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

Seems like I was too optimist. It still happens in the settings app. Not sure if this is related but I sometimes see some crazy values in the contacts app for the touchY property. 

For example if I add a |dump('type: ' + e.type + " X: " + touch.pageX + 'Y: ' + e.touch.pageY);| at https://github.com/mozilla-b2g/gaia/blob/master/apps/communications/contacts/js/contacts_shortcuts.js#L46 I see strange values sometimes for touchY:

I/GeckoDump( 7029): evt.type= touchstart 309 : 231
I/GeckoDump( 7029): evt.type= touchmove 309 : 251
I/GeckoDump( 7029): evt.type= touchmove 305 : 296
I/GeckoDump( 7029): evt.type= touchmove 305 : -7039
E/GeckoConsole( 7029): [JavaScript Error: "TypeError: getTarget(...) is null" {file: "app://communications.gaiamobile.org/contacts/js/contacts_shortcuts.js" line: 136}]
I/GeckoDump( 7029): evt.type= touchmove 305 : 343
I/GeckoDump( 7029): evt.type= touchmove 305 : -10577
E/GeckoConsole( 7029): [JavaScript Error: "TypeError: getTarget(...) is null" {file: "app://communications.gaiamobile.org/contacts/js/contacts_shortcuts.js" line: 136}]
I/GeckoDump( 7029): evt.type= touchmove 305 : 398
I/GeckoDump( 7029): evt.type= touchmove 305 : -14504
E/GeckoConsole( 7029): [JavaScript Error: "TypeError: getTarget(...) is null" {file: "app://communications.gaiamobile.org/contacts/js/contacts_shortcuts.js" line: 136}]
I/GeckoDump( 7029): evt.type= touchmove 305 : 368
I/GeckoDump( 7029): evt.type= touchmove 301 : 351

Comment 3

[Milan Sreckovic [:milan] (needinfo for best results)]

It also happens in E-mail - see bug 941215.

Comment 4

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

Let's say this is a duplicate of bug 909877.

Comment 5

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

Gasp wrong copy-paste. I was trying to duplicate this bug over bug 941215.