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Cursor.js
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Cursor.js
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var React = require('react');
var assign = require('object-assign');
var PropTypes = React.PropTypes;
var event = require('./event');
var noop = function () {}
var buildUnwrappingListener = function(listener) {
return function(e) {
var unwrappedEvent = e.changedTouches[e.changedTouches.length - 1];
unwrappedEvent.stopPropagation = e.stopPropagation.bind(e);
unwrappedEvent.preventDefault = e.preventDefault.bind(e);
return listener(unwrappedEvent);
};
}
var Cursor = React.createClass({
displayName: 'RangeSliderCursor',
propTypes: {
axis: PropTypes.oneOf(['X', 'Y']),
offset: PropTypes.number,
onDragStart: PropTypes.func,
onDrag: PropTypes.func,
onDragEnd: PropTypes.func,
value: PropTypes.number
},
getDefaultProps: function () {
return {
axis: 'X',
offset: 0,
size: 0,
position: 0,
onDragStart: noop,
onDragEnd: noop
};
},
// Mixin events
mixins: [event],
getStyle: function () {
var transform = 'translate' + this.props.axis + '(' + this.props.offset + 'px)';
return {
WebkitTransform: transform,
MozTransform: transform,
msTransform: transform,
OTransform: transform,
transform: transform,
position: 'absolute'
}
},
getProps: function () {
var props = assign({}, this.props);
var i = this.props.position;
var l = this.props.size;
props.style = this.getStyle();
var mousemoveListener, touchmoveListener, mouseupListener, touchendListener;
props.onMouseDown = function () {
this.addEvent(window, 'mousemove', mousemoveListener);
this.addEvent(window, 'touchmove', touchmoveListener);
this.addEvent(window, 'mouseup', mouseupListener);
this.addEvent(window, 'touchend', touchendListener);
return props.onDragStart.apply(null, arguments);
}.bind(this);
props.onTouchStart = function (e) {
e.preventDefault(); // prevent for scroll
return buildUnwrappingListener(props.onMouseDown)(e);
}.bind(this);
mousemoveListener = props.onDrag;
touchmoveListener = buildUnwrappingListener(mousemoveListener);
mouseupListener = function () {
this.removeEvent(window, 'mousemove', mousemoveListener);
this.removeEvent(window, 'touchmove', touchmoveListener);
this.removeEvent(window, 'mouseup', mouseupListener);
this.removeEvent(window, 'touchend', touchendListener);
return props.onDragEnd.apply(null, arguments);
}.bind(this);
touchendListener = buildUnwrappingListener(mouseupListener);
props.zIndex = (i === 0 || i === l + 1) ? 0 : i + 1;
return props;
},
render: function () {
return (
React.createElement('div', this.getProps(),
React.createElement('span', null,
React.createElement('span', null,
this.props.value)
)
)
);
}
});
module.exports = Cursor;