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Work in progress for being able to control when we cancel events.

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This commit is contained in:
Ian Gilman 2018-09-17 09:13:18 -07:00
parent 00551e6c2b
commit 0571e31de4
2 changed files with 74 additions and 45 deletions
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54
src/mousetracker.js
View File

@ -1963,7 +1963,7 @@
currentTime: $.now()
};
if ( updatePointersDown( tracker, event, [ gPoint ], getStandardizedButton( event.button ) ) ) {
if ( updatePointersDown( tracker, event, [ gPoint ], getStandardizedButton( event.button ) ).capture ) {
$.stopEvent( event );
capturePointer( tracker, 'mouse' );
}
@ -2139,13 +2139,16 @@
}
}
if ( updatePointersDown( tracker, event, gPoints, 0 ) ) { // 0 means primary button press/release or touch contact
var result = updatePointersDown( tracker, event, gPoints, 0 ); // 0 means primary button press/release or touch contact
if ( result.capture && result.cancel ) {
$.stopEvent( event );
capturePointer( tracker, 'touch', touchCount );
}
if (result.cancel) {
$.cancelEvent( event );
}
}
/**
@ -2263,10 +2266,12 @@
} );
}
updatePointersMove( tracker, event, gPoints );
var result = updatePointersMove( tracker, event, gPoints );
if (result.cancel) {
$.cancelEvent( event );
}
}
/**
@ -2363,7 +2368,7 @@
currentTime: $.now()
};
if ( updatePointersDown( tracker, event, [ gPoint ], event.button ) ) {
if ( updatePointersDown( tracker, event, [ gPoint ], event.button ).capture ) {
$.stopEvent( event );
capturePointer( tracker, gPoint.type );
}
@ -2696,7 +2701,8 @@
* Note on chorded button presses (a button pressed when another button is already pressed): In the W3C Pointer Events model,
* only one pointerdown/pointerup event combo is fired. Chorded button state changes instead fire pointermove events.
*
* @returns {Boolean} True if pointers should be captured to the tracked element, otherwise false.
* @returns {Object} Properties: capture: True if pointers should be captured to the tracked element, otherwise false.
* TODO: Document cancel
*/
function updatePointersDown( tracker, event, gPoints, buttonChanged ) {
var delegate = THIS[ tracker.hash ],
@ -2707,6 +2713,11 @@
curGPoint,
updateGPoint;
var output = {
capture: false,
cancel: true
};
if ( typeof event.buttons !== 'undefined' ) {
pointsList.buttons = event.buttons;
} else {
@ -2783,7 +2794,7 @@
}
}
return false;
return output;
}
for ( i = 0; i < gPointCount; i++ ) {
@ -2821,8 +2832,7 @@
if ( pointsList.contacts === 1 ) {
// Press
if ( tracker.pressHandler ) {
propagate = tracker.pressHandler(
{
var outgoingEvent = {
eventSource: tracker,
pointerType: curGPoint.type,
position: getPointRelativeToAbsolute( curGPoint.contactPos, tracker.element ),
@ -2831,11 +2841,16 @@
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
};
propagate = tracker.pressHandler(outgoingEvent);
if ( propagate === false ) {
$.cancelEvent( event );
}
if (outgoingEvent.preventDefaultAction) {
output.cancel = false;
}
}
} else if ( pointsList.contacts === 2 ) {
if ( tracker.pinchHandler && curGPoint.type === 'touch' ) {
@ -2847,7 +2862,8 @@
}
}
return true;
output.capture = true;
return output;
}
@ -3156,6 +3172,10 @@
delta,
propagate;
var output = {
cancel: true
};
if ( typeof event.buttons !== 'undefined' ) {
pointsList.buttons = event.buttons;
}
@ -3234,8 +3254,7 @@
if ( tracker.dragHandler ) {
updateGPoint = pointsList.asArray()[ 0 ];
delta = updateGPoint.currentPos.minus( updateGPoint.lastPos );
propagate = tracker.dragHandler(
{
var outgoingEvent = {
eventSource: tracker,
pointerType: updateGPoint.type,
position: getPointRelativeToAbsolute( updateGPoint.currentPos, tracker.element ),
@ -3248,11 +3267,14 @@
originalEvent: event,
preventDefaultAction: false,
userData: tracker.userData
}
);
};
propagate = tracker.dragHandler(outgoingEvent);
if ( propagate === false ) {
$.cancelEvent( event );
}
if (outgoingEvent.preventDefaultAction) {
output.cancel = false;
}
}
} else if ( pointsList.contacts === 2 ) {
// Move (2 contacts, use center)
@ -3304,6 +3326,8 @@
}
}
}
return output;
}

21
src/viewer.js
View File

@ -2790,6 +2790,7 @@ function onCanvasDrag( event ) {
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent( 'canvas-drag', canvasDragEventArgs);
event.preventDefaultAction = canvasDragEventArgs.preventDefaultAction;
if ( !canvasDragEventArgs.preventDefaultAction && this.viewport ) {
gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
@ -2942,6 +2943,15 @@ function onCanvasExit( event ) {
}
function onCanvasPress( event ) {
var canvasPressEventArgs = {
tracker: event.eventSource,
pointerType: event.pointerType,
position: event.position,
insideElementPressed: event.insideElementPressed,
insideElementReleased: event.insideElementReleased,
originalEvent: event.originalEvent
};
/**
* Raised when the primary mouse button is pressed or touch starts on the {@link OpenSeadragon.Viewer#canvas} element.
*
@ -2957,14 +2967,9 @@ function onCanvasPress( event ) {
* @property {Object} originalEvent - The original DOM event.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent( 'canvas-press', {
tracker: event.eventSource,
pointerType: event.pointerType,
position: event.position,
insideElementPressed: event.insideElementPressed,
insideElementReleased: event.insideElementReleased,
originalEvent: event.originalEvent
});
this.raiseEvent( 'canvas-press', canvasPressEventArgs);
event.preventDefaultAction = canvasPressEventArgs.preventDefaultAction;
}
function onCanvasRelease( event ) {