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fixing mouse interaction in Firefox #11

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fixing mouse interaction in Firefox #11

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2 changes: 1 addition & 1 deletion build/pink-trombone.min.js
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2 changes: 1 addition & 1 deletion pink-trombone.min.js
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18 changes: 9 additions & 9 deletions script/graphics/TractUI.js
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Original file line number Diff line number Diff line change
Expand Up @@ -520,10 +520,14 @@ class TractUI {
});
}

_getTouchIdentifier(event) {
return window.Touch !== undefined && (event instanceof Touch)
? event.identifier
: -1;
}

_startEvent(event) {
const touchIdentifier = (event instanceof Touch)?
event.identifier :
-1;
const touchIdentifier = this._getTouchIdentifier(event);

if(this._touchConstrictionIndices[touchIdentifier] == undefined) {
const position = this._getEventPosition(event);
Expand All @@ -545,9 +549,7 @@ class TractUI {
}
}
_moveEvent(event) {
const touchIdentifier = (event instanceof Touch)?
event.identifier :
-1;
const touchIdentifier = this._getTouchIdentifier(event);

if(this._touchConstrictionIndices[touchIdentifier] !== undefined) {
const position = this._getEventPosition(event);
Expand All @@ -570,9 +572,7 @@ class TractUI {
}
}
_endEvent(event) {
const touchIdentifier = (event instanceof Touch)?
event.identifier :
-1;
const touchIdentifier = this._getTouchIdentifier(event);

if(this._touchConstrictionIndices[touchIdentifier] !== undefined) {
const constrictionIndex = this._touchConstrictionIndices[touchIdentifier];
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