Listen for mouseup events from window as well as target element
Pressing an holding a mouse button and then moving the mouse out of the canvas before releasing meant that onmouseup was never triggered.
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@ -609,10 +609,12 @@ that.grab = function() {
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if ('ontouchstart' in document.documentElement) {
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Util.addEvent(c, 'touchstart', onMouseDown);
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Util.addEvent(window, 'touchend', onMouseUp);
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Util.addEvent(c, 'touchend', onMouseUp);
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Util.addEvent(c, 'touchmove', onMouseMove);
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} else {
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Util.addEvent(c, 'mousedown', onMouseDown);
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Util.addEvent(window, 'mouseup', onMouseUp);
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Util.addEvent(c, 'mouseup', onMouseUp);
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Util.addEvent(c, 'mousemove', onMouseMove);
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Util.addEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
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@ -632,10 +634,12 @@ that.ungrab = function() {
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if ('ontouchstart' in document.documentElement) {
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Util.removeEvent(c, 'touchstart', onMouseDown);
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Util.removeEvent(window, 'touchend', onMouseUp);
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Util.removeEvent(c, 'touchend', onMouseUp);
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Util.removeEvent(c, 'touchmove', onMouseMove);
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} else {
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Util.removeEvent(c, 'mousedown', onMouseDown);
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Util.removeEvent(window, 'mouseup', onMouseUp);
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Util.removeEvent(c, 'mouseup', onMouseUp);
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Util.removeEvent(c, 'mousemove', onMouseMove);
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Util.removeEvent(c, (Util.Engine.gecko) ? 'DOMMouseScroll' : 'mousewheel',
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