Hopiu/jquery-mobile
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Added scrollThreshold and checks for page[XY]Offset changes within handleTouchMove to catch the case where the window scrolls, but the scroll events are not dispatched till after touchend. Note that page[XY]Offset is not updated before touchend on every platform, but it does seem to update on iOS which is where we need it.

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This commit is contained in:
Kin Blas 2011-02-23 23:53:17 -08:00
parent 6d7bce63b6
commit 3cb884b6d7
1 changed files with 80 additions and 17 deletions
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97
js/jquery.mobile.vmouse.js
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@ -30,8 +30,14 @@ var dataPropertyName = "virtualMouseBindings",
activeDocHandlers = {},
blockMouseEvents = false,
resetTimerID = 0,
startX = 0,
startY = 0,
startScrollX = 0,
startScrollY = 0,
scrollThreshold = 10,
didScroll = false,
clickBlockList = [];
clickBlockList = [],
scrollTopSupported = $.support.scrollTop;
function getNativeEvent(event)
{
@ -87,15 +93,56 @@ function getClosestElementWithVirtualBinding(element, eventType)
return null;
}
function disableMouseBindings()
function enableTouchBindings()
{
blockMouseEvents = true;
if (!activeDocHandlers["touchbindings"]){
var $document = $(document);
$document.bind("touchend", handleTouchEnd);
// On touch platforms, touching the screen and then dragging your finger
// causes the window content to scroll after some distance threshold is
// exceeded. On these platforms, a scroll prevents a click event from being
// dispatched, and on some platforms, even the touchend is suppressed. To
// mimic the suppression of the click event, we need to watch for a scroll
// event. Unfortunately, some platforms like iOS don't dispatch scroll
// events until *AFTER* the user lifts their finger (touchend). This means
// we need to watch both scroll and touchmove events to figure out whether
// or not a scroll happenens before the touchend event is fired.
$document.bind("touchmove", handleTouchMove);
$document.bind("scroll", handleScroll);
activeDocHandlers["touchbindings"] = 1;
}
}
function disableTouchBindings()
{
if (activeDocHandlers["touchbindings"]){
var $document = $(document);
$document.unbind("touchmove", handleTouchMove);
$document.unbind("touchend", handleTouchEnd);
$document.unbind("scroll", handleScroll);
activeDocHandlers["touchbindings"] = 0;
}
}
function enableMouseBindings()
{
blockMouseEvents = false;
clickBlockList.length = 0;
// When mouse bindings are enabled, our
// touch bindings are disabled.
disableTouchBindings();
}
function disableMouseBindings()
{
blockMouseEvents = true;
// When mouse bindings are disabled, our
// touch bindings are enabled.
enableTouchBindings();
}
function startResetTimer()
@ -147,32 +194,48 @@ function clearResetTimer()
function handleTouchStart(event)
{
clearResetTimer();
if (getClosestElementWithVirtualBinding(event.target)){
clearResetTimer();
disableMouseBindings();
didScroll = false;
var t = getNativeEvent(event).touches[0];
startX = t.pageX;
startY = t.pageY;
disableMouseBindings();
didScroll = false;
if (scrollTopSupported){
startScrollX = window.pageXOffset;
startScrollY = window.pageYOffset;
}
triggerVirtualEvent("vmouseover", event);
triggerVirtualEvent("vmousedown", event);
}
}
var $document = $(document);
$document.bind("touchmove", handleTouchMove);
$document.bind("touchend", handleTouchEnd);
triggerVirtualEvent("vmouseover", event);
triggerVirtualEvent("vmousedown", event);
function handleScroll(event)
{
didScroll = true;
startResetTimer();
}
function handleTouchMove(event)
{
didScroll = true;
var t = getNativeEvent(event).touches[0];
didScroll = didScroll
|| (scrollTopSupported && (startScrollX != window.pageXOffset || startScrollY != window.pageYOffset))
|| (Math.abs(t.pageX - startX) > scrollThreshold || Math.abs(t.pageY - startY) > scrollThreshold);
triggerVirtualEvent("vmousemove", event);
startResetTimer();
}
function handleTouchEnd(event)
{
var $document = $(document);
$document.unbind("touchmove", handleTouchMove);
$document.unbind("touchend", handleTouchEnd);
disableTouchBindings();
triggerVirtualEvent("vmouseup", event);
if (!didScroll){
if (triggerVirtualEvent("vclick", event)){