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Code Issues Projects Releases Wiki Activity

Improved releasing of tracked pointers on destroy()/stopTracking() (#1346)

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This commit is contained in:
Mark Salsbery 2020-08-13 16:43:49 -07:00
parent 5a9874e4fa
commit 8fc83c696a
2 changed files with 51 additions and 61 deletions
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2
changelog.txt
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@ -23,6 +23,8 @@ OPENSEADRAGON CHANGELOG
* MouseTracker: Fire dragEndHandler event even if release point same as initial contact point (#1459)
* MouseTracker: Pointer capture implemented with capture APIs where available. Only fallback to emulated capture on extremely old browsers
* MouseTracker: Added preProcessEventHandler option to allow MouseTracker instances to control bubbling and default behavior of events on their associated element
* MouseTracker: Improved handling of canceled events (#1728)
* MouseTracker: Improved releasing of tracked pointers on destroy()/stopTracking() (#1346)
* Updated Viewer, Button, Drawer, Navigator, ReferenceStrip DOM for proper DOM event handling
* Added OpenSeadragon.setElementPointerEventsNone() for setting pointer-events:'none' on DOM elements

110
src/mousetracker.js
View File

@ -344,24 +344,26 @@
return this;
},
/**
* Returns the {@link OpenSeadragon.MouseTracker.GesturePointList|GesturePointList} for all but the given pointer device type.
* @function
* @param {String} type - The pointer device type: "mouse", "touch", "pen", etc.
* @returns {Array.<OpenSeadragon.MouseTracker.GesturePointList>}
*/
getActivePointersListsExceptType: function ( type ) {
var delegate = THIS[ this.hash ];
var listArray = [];
// //TODO Revisit this if there's still an issue. The PointerEvent model should have no problems
// // like the issue this code attempts to fix.
// /**
// * Returns the {@link OpenSeadragon.MouseTracker.GesturePointList|GesturePointList} for all but the given pointer device type.
// * @function
// * @param {String} type - The pointer device type: "mouse", "touch", "pen", etc.
// * @returns {Array.<OpenSeadragon.MouseTracker.GesturePointList>}
// */
// getActivePointersListsExceptType: function ( type ) {
// var delegate = THIS[ this.hash ];
// var listArray = [];
for (var i = 0; i < delegate.activePointersLists.length; ++i) {
if (delegate.activePointersLists[i].type !== type) {
listArray.push(delegate.activePointersLists[i]);
}
}
// for (var i = 0; i < delegate.activePointersLists.length; ++i) {
// if (delegate.activePointersLists[i].type !== type) {
// listArray.push(delegate.activePointersLists[i]);
// }
// }
return listArray;
},
// return listArray;
// },
/**
* Returns the {@link OpenSeadragon.MouseTracker.GesturePointList|GesturePointList} for the given pointer device type,
@ -1012,6 +1014,7 @@
blurHandler: function () { }
};
// https://github.com/openseadragon/openseadragon/pull/790
/**
* True if inside an iframe, otherwise false.
* @member {Boolean} isInIframe
@ -1026,6 +1029,7 @@
}
})();
// https://github.com/openseadragon/openseadragon/pull/790
/**
* @function
* @private
@ -1451,7 +1455,7 @@
},
/**
* Increment this pointer's contact count.
* Increment this pointer list's contact count.
* It will evaluate whether this pointer type is allowed to have multiple contacts.
* @function
*/
@ -1465,7 +1469,7 @@
},
/**
* Decrement this pointer's contact count.
* Decrement this pointer list's contact count.
* It will make sure the count does not go below 0.
* @function
*/
@ -1491,49 +1495,28 @@
*/
function clearTrackedPointers( tracker ) {
var delegate = THIS[ tracker.hash ],
i,
i, j,
pointsList,
gPoints,
gPointsToRemove,
pointerListCount = delegate.activePointersLists.length;
for ( i = 0; i < pointerListCount; i++ ) {
if ( delegate.activePointersLists[ i ].captureCount > 0 ) {
$.removeEvent(
$.MouseTracker.captureElement,
'mousemove',
delegate.mousemovecaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
'mouseup',
delegate.mouseupcaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
$.MouseTracker.unprefixedPointerEvents ? 'pointermove' : 'MSPointerMove',
delegate.pointermovecaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
$.MouseTracker.unprefixedPointerEvents ? 'pointerup' : 'MSPointerUp',
delegate.pointerupcaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
'touchmove',
delegate.touchmovecaptured,
true
);
$.removeEvent(
$.MouseTracker.captureElement,
'touchend',
delegate.touchendcaptured,
true
);
pointsList = delegate.activePointersLists[ i ];
delegate.activePointersLists[ i ].captureCount = 0;
if ( pointsList.getLength() > 0 ) {
// Make an array containing references to the gPoints in the pointer list
// (because calls to stopTrackingPointer() are going to modify the pointer list)
gPointsToRemove = [];
gPoints = pointsList.asArray();
for ( j = 0; j < gPoints.length; j++ ) {
gPointsToRemove.push( gPoints[ j ] );
}
// Release and remove all gPoints from the pointer list
for ( j = 0; j < gPointsToRemove.length; j++ ) {
stopTrackingPointer( tracker, pointsList, gPointsToRemove[ j ] );
}
}
}
@ -1656,6 +1639,7 @@
// eslint-disable-next-line no-use-before-define
//$.console.log('Emulated mouse capture set');
eventParams = getCaptureEventParams( tracker, $.MouseTracker.havePointerEvents ? 'pointerevent' : gPoint.type );
// https://github.com/openseadragon/openseadragon/pull/790
if (isInIframe && canAccessEvents(window.top)) {
$.addEvent(
window.top,
@ -1708,6 +1692,7 @@
// (Note we listen on the capture phase so the captured handlers will get called first)
//$.console.log('Emulated mouse capture release');
eventParams = getCaptureEventParams( tracker, $.MouseTracker.havePointerEvents ? 'pointerevent' : gPoint.type );
// https://github.com/openseadragon/openseadragon/pull/790
if (isInIframe && canAccessEvents(window.top)) {
$.removeEvent(
window.top,
@ -3192,19 +3177,22 @@
* @function
* @private
* @inner
* @param {OpenSeadragon.MouseTracker} tracker
* A reference to the MouseTracker instance.
* @param {OpenSeadragon.MouseTracker.GesturePointList} pointsList
* The GesturePointList to stop tracking the pointer on.
* @param {OpenSeadragon.MouseTracker.GesturePoint} gPoint
* Gesture point to stop tracking.
* @returns {Number} Number of gesture points in pointsList.
*/
function stopTrackingPointer( pointsList, gPoint ) {
function stopTrackingPointer( tracker, pointsList, gPoint ) {
var listLength;
var trackedGPoint = pointsList.getById( gPoint.id );
if ( trackedGPoint ) {
if ( trackedGPoint.captured ) {
releasePointer( tracker, trackedGPoint );
pointsList.removeContact();
}
@ -3451,7 +3439,7 @@
updateGPoint.currentPos = gPoint.currentPos;
updateGPoint.currentTime = gPoint.currentTime;
} else {
stopTrackingPointer( pointsList, updateGPoint );
stopTrackingPointer( tracker, pointsList, updateGPoint );
}
gPoint = updateGPoint;
@ -3883,7 +3871,7 @@
updateGPoint.currentPos = gPoint.currentPos;
updateGPoint.currentTime = gPoint.currentTime;
if ( !updateGPoint.insideElement ) {
stopTrackingPointer( pointsList, updateGPoint );
stopTrackingPointer( tracker, pointsList, updateGPoint );
}
releasePoint = updateGPoint.currentPos;
@ -4217,7 +4205,7 @@
updateGPoint = pointsList.getById( gPoint.id );
if ( updateGPoint ) {
stopTrackingPointer( pointsList, updateGPoint );
stopTrackingPointer( tracker, pointsList, updateGPoint );
}
//else {
// // should never get here?