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Update "requireGestureToFail" API implementation

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This commit is contained in:
Pavel fljot 2012-07-04 21:36:55 +03:00
parent 60d9cb6744
commit 2d52729f7c
1 changed files with 25 additions and 15 deletions
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40
src/org/gestouch/gestures/Gesture.as
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@ -299,6 +299,11 @@ package org.gestouch.gestures
public function requireGestureToFail(gesture:Gesture):void public function requireGestureToFail(gesture:Gesture):void
{ {
//TODO //TODO
if (!gesture)
{
throw new ArgumentError();
}
_gesturesToFail[gesture] = true; _gesturesToFail[gesture] = true;
} }
@ -406,14 +411,16 @@ package org.gestouch.gestures
if (newState == GestureState.BEGAN || newState == GestureState.RECOGNIZED) if (newState == GestureState.BEGAN || newState == GestureState.RECOGNIZED)
{ {
var gestureToFail:Gesture; var gestureToFail:Gesture;
var key:*;
// first we check if other required-to-fail gestures recognized // first we check if other required-to-fail gestures recognized
// TODO: is this really necessary? using "requireGestureToFail" API assume that // TODO: is this really necessary? using "requireGestureToFail" API assume that
// required-to-fail gesture always recognizes AFTER this one. // required-to-fail gesture always recognizes AFTER this one.
for (var key:* in _gesturesToFail) for (key in _gesturesToFail)
{ {
gestureToFail = key as Gesture; gestureToFail = key as Gesture;
if (gestureToFail.state != GestureState.IDLE && gestureToFail.state != GestureState.POSSIBLE if (gestureToFail.state != GestureState.IDLE &&
&& gestureToFail.state != GestureState.FAILED) gestureToFail.state != GestureState.POSSIBLE &&
gestureToFail.state != GestureState.FAILED)
{ {
// Looks like other gesture won't fail, // Looks like other gesture won't fail,
// which means the required condition will not happen, so we must fail // which means the required condition will not happen, so we must fail
@ -421,7 +428,7 @@ package org.gestouch.gestures
return false; return false;
} }
} }
// then we check of other required-to-fail gestures are actually tracked (not IDLE) // then we check if other required-to-fail gestures are actually tracked (not IDLE)
// and not still not recognized (e.g. POSSIBLE state) // and not still not recognized (e.g. POSSIBLE state)
for (key in _gesturesToFail) for (key in _gesturesToFail)
{ {
@ -430,6 +437,13 @@ package org.gestouch.gestures
{ {
// Other gesture might fail soon, so we postpone state change // Other gesture might fail soon, so we postpone state change
_pendingRecognizedState = newState; _pendingRecognizedState = newState;
for (key in _gesturesToFail)
{
gestureToFail = key as Gesture;
gestureToFail.addEventListener(GestureStateEvent.STATE_CHANGE, gestureToFail_stateChangeHandler, false, 0, true);
}
return false; return false;
} }
// else if gesture is in IDLE state it means it doesn't track anything, // else if gesture is in IDLE state it means it doesn't track anything,
@ -528,12 +542,6 @@ package org.gestouch.gestures
if (_touchesCount == 1 && state == GestureState.IDLE) if (_touchesCount == 1 && state == GestureState.IDLE)
{ {
for (var key:* in _gesturesToFail)
{
var gestureToFail:Gesture = key as Gesture;
gestureToFail.addEventListener(GestureStateEvent.STATE_CHANGE, gestureToFail_stateChangeHandler, false, 0, true);
}
setState(GestureState.POSSIBLE); setState(GestureState.POSSIBLE);
} }
} }
@ -557,10 +565,7 @@ package org.gestouch.gestures
protected function gestureToFail_stateChangeHandler(event:GestureStateEvent):void protected function gestureToFail_stateChangeHandler(event:GestureStateEvent):void
{ {
if (state != GestureState.POSSIBLE) if (!_pendingRecognizedState || state != GestureState.POSSIBLE)
return;//just in case..FIXME?
if (!_pendingRecognizedState)
return; return;
if (event.newState == GestureState.FAILED) if (event.newState == GestureState.FAILED)
@ -575,13 +580,18 @@ package org.gestouch.gestures
} }
} }
// at this point all gestures-to-fail are either in IDLE or in FAILED states
if (setState(_pendingRecognizedState)) if (setState(_pendingRecognizedState))
{ {
onDelayedRecognize(); onDelayedRecognize();
} }
} }
else if (event.newState != GestureState.POSSIBLE) else if (event.newState != GestureState.IDLE && event.newState != GestureState.POSSIBLE)
{ {
// NB: _other_ gesture may switch to IDLE state if it was in FAILED when
// _this_ gesture initially attempted to switch to one of recognized state.
// ...and that's OK (we ignore that)
setState(GestureState.FAILED); setState(GestureState.FAILED);
} }
} }