vis.js is a dynamic, browser-based visualization library
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var Hammer = require('hammerjs');
/**
* @constructor Item
* @param {Object} data Object containing (optional) parameters type,
* start, end, content, group, className.
* @param {{toScreen: function, toTime: function}} conversion
* Conversion functions from time to screen and vice versa
* @param {Object} options Configuration options
* // TODO: describe available options
*/
function Item (data, conversion, options) {
this.id = null;
this.parent = null;
this.data = data;
this.dom = null;
this.conversion = conversion || {};
this.options = options || {};
this.selected = false;
this.displayed = false;
this.dirty = true;
this.top = null;
this.left = null;
this.width = null;
this.height = null;
}
/**
* Select current item
*/
Item.prototype.select = function() {
this.selected = true;
if (this.displayed) this.redraw();
};
/**
* Unselect current item
*/
Item.prototype.unselect = function() {
this.selected = false;
if (this.displayed) this.redraw();
};
/**
* Set a parent for the item
* @param {ItemSet | Group} parent
*/
Item.prototype.setParent = function(parent) {
if (this.displayed) {
this.hide();
this.parent = parent;
if (this.parent) {
this.show();
}
}
else {
this.parent = parent;
}
};
/**
* Check whether this item is visible inside given range
* @returns {{start: Number, end: Number}} range with a timestamp for start and end
* @returns {boolean} True if visible
*/
Item.prototype.isVisible = function(range) {
// Should be implemented by Item implementations
return false;
};
/**
* Show the Item in the DOM (when not already visible)
* @return {Boolean} changed
*/
Item.prototype.show = function() {
return false;
};
/**
* Hide the Item from the DOM (when visible)
* @return {Boolean} changed
*/
Item.prototype.hide = function() {
return false;
};
/**
* Repaint the item
*/
Item.prototype.redraw = function() {
// should be implemented by the item
};
/**
* Reposition the Item horizontally
*/
Item.prototype.repositionX = function() {
// should be implemented by the item
};
/**
* Reposition the Item vertically
*/
Item.prototype.repositionY = function() {
// should be implemented by the item
};
/**
* Repaint a delete button on the top right of the item when the item is selected
* @param {HTMLElement} anchor
* @protected
*/
Item.prototype._repaintDeleteButton = function (anchor) {
if (this.selected && this.options.editable.remove && !this.dom.deleteButton) {
// create and show button
var me = this;
var deleteButton = document.createElement('div');
deleteButton.className = 'delete';
deleteButton.title = 'Delete this item';
Hammer(deleteButton, {
preventDefault: true
}).on('tap', function (event) {
me.parent.removeFromDataSet(me);
event.stopPropagation();
});
anchor.appendChild(deleteButton);
this.dom.deleteButton = deleteButton;
}
else if (!this.selected && this.dom.deleteButton) {
// remove button
if (this.dom.deleteButton.parentNode) {
this.dom.deleteButton.parentNode.removeChild(this.dom.deleteButton);
}
this.dom.deleteButton = null;
}
};
module.exports = Item;