vis.js is a dynamic, browser-based visualization library
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var Hammer = require('../../module/hammer');
var util = require('../../util');
var Component = require('./Component');
/**
* A custom time bar
* @param {{range: Range, dom: Object}} body
* @param {Object} [options] Available parameters:
* {Boolean} [showCustomTime]
* @constructor CustomTime
* @extends Component
*/
function CustomTime (body, options) {
this.body = body;
// default options
this.defaultOptions = {
showCustomTime: false
};
this.options = util.extend({}, this.defaultOptions);
this.customTime = new Date();
this.eventParams = {}; // stores state parameters while dragging the bar
// create the DOM
this._create();
this.setOptions(options);
}
CustomTime.prototype = new Component();
/**
* Set options for the component. Options will be merged in current options.
* @param {Object} options Available parameters:
* {boolean} [showCustomTime]
*/
CustomTime.prototype.setOptions = function(options) {
if (options) {
// copy all options that we know
util.selectiveExtend(['showCustomTime'], this.options, options);
}
};
/**
* Create the DOM for the custom time
* @private
*/
CustomTime.prototype._create = function() {
var bar = document.createElement('div');
bar.className = 'customtime';
bar.style.position = 'absolute';
bar.style.top = '0px';
bar.style.height = '100%';
this.bar = bar;
var drag = document.createElement('div');
drag.style.position = 'relative';
drag.style.top = '0px';
drag.style.left = '-10px';
drag.style.height = '100%';
drag.style.width = '20px';
bar.appendChild(drag);
// attach event listeners
this.hammer = Hammer(bar, {
prevent_default: true
});
this.hammer.on('dragstart', this._onDragStart.bind(this));
this.hammer.on('drag', this._onDrag.bind(this));
this.hammer.on('dragend', this._onDragEnd.bind(this));
};
/**
* Destroy the CustomTime bar
*/
CustomTime.prototype.destroy = function () {
this.options.showCustomTime = false;
this.redraw(); // will remove the bar from the DOM
this.hammer.enable(false);
this.hammer = null;
this.body = null;
};
/**
* Repaint the component
* @return {boolean} Returns true if the component is resized
*/
CustomTime.prototype.redraw = function () {
if (this.options.showCustomTime) {
var parent = this.body.dom.backgroundVertical;
if (this.bar.parentNode != parent) {
// attach to the dom
if (this.bar.parentNode) {
this.bar.parentNode.removeChild(this.bar);
}
parent.appendChild(this.bar);
}
var x = this.body.util.toScreen(this.customTime);
this.bar.style.left = x + 'px';
this.bar.title = 'Time: ' + this.customTime;
}
else {
// remove the line from the DOM
if (this.bar.parentNode) {
this.bar.parentNode.removeChild(this.bar);
}
}
return false;
};
/**
* Set custom time.
* @param {Date} time
*/
CustomTime.prototype.setCustomTime = function(time) {
this.customTime = new Date(time.valueOf());
this.redraw();
};
/**
* Retrieve the current custom time.
* @return {Date} customTime
*/
CustomTime.prototype.getCustomTime = function() {
return new Date(this.customTime.valueOf());
};
/**
* Start moving horizontally
* @param {Event} event
* @private
*/
CustomTime.prototype._onDragStart = function(event) {
this.eventParams.dragging = true;
this.eventParams.customTime = this.customTime;
event.stopPropagation();
event.preventDefault();
};
/**
* Perform moving operating.
* @param {Event} event
* @private
*/
CustomTime.prototype._onDrag = function (event) {
if (!this.eventParams.dragging) return;
var deltaX = event.gesture.deltaX,
x = this.body.util.toScreen(this.eventParams.customTime) + deltaX,
time = this.body.util.toTime(x);
this.setCustomTime(time);
// fire a timechange event
this.body.emitter.emit('timechange', {
time: new Date(this.customTime.valueOf())
});
event.stopPropagation();
event.preventDefault();
};
/**
* Stop moving operating.
* @param {event} event
* @private
*/
CustomTime.prototype._onDragEnd = function (event) {
if (!this.eventParams.dragging) return;
// fire a timechanged event
this.body.emitter.emit('timechanged', {
time: new Date(this.customTime.valueOf())
});
event.stopPropagation();
event.preventDefault();
};
module.exports = CustomTime;