dragselect

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dragSelect

easily add a selection algorythm to your application/website.

Project Page: Demo & Info

https://thibaultjanbeyer.github.io/dragSelect/

Key-Features

• No dependencies
• Add drag selection.
• Choose which elements can be selected.
• Awesome browser support, works even on IE7
• Ease of use
• Lightweight, only 1KB gzipped
• DragSelect was written with Performance in mind.
• Free & open source under MIT License

Why?

Because aparently there is nothing that does not require jquery out there yet.

1. Installation

easy

Just download the file (minified) and add it to your document:

npm

npm install --save-dev npm-dragselect

bower

bower install --save-dev dragselect

That's it, you're ready to rock! Of course you can also just include the function within your code to save a request.

Usage

Now in your JavaScript you can simply pass elements to the function like so:

simple

The rectangle has to have a position: fixed/absolute attribute. The other ones have purely visual reasons.

<div id="rectangle" 
     style="position: fixed;
            background-color: blue;
            border: 1px solid blue;
            display:none;"></div>

dragSelect({
  selectables: document.getElementsByClassName('selectable-node')
});

complete

var ds = dragSelect({
  selector: document.getElementById('rectangle'), // draggable element '#rectangle is default but can be set to anything'
  selectables: [ document.getElementById('selectable1') ], // nodes that can be selected as array
  area: document.getElementById('area'), // area in which you can drag'
  onElementSelect: function(element) {}, // this is optional, it is fired every time an element is selected. (element) = just selected node
  onElementUnselect: function(element) {}, // this is optional, it is fired every time an element is de-selected. (element) = just de-selected node.
  callback: function(elements) {} // this is optional is fired once the user releases the mouse. (elements) = selected nodes.
});

// if you add the function to a variable like we did, you have access to all its functions
// and can now use start() and stop() like so:
ds.getSelection();  // returns all currently selected nodes

ds.stop();  // will teardown/stop the whole functionality
ds.start();  // reset the functionality after a teardown

Properties:

property	type	usage
selector	single DOM element (node)	the square that will draw the selection. Default = #rectangle
selectables	DOM elements (nodes)	the elements that can be selected
area	single DOM element (node)	The square in which you are able to select
onElementSelect	function	this is optional, it is fired every time an element is selected. This callback gets a property which is the just selected node
onElementUnselect	function	this is optional, it is fired every time an element is de-selected. This callback gets a property which is the just de-selected node.
callback	function	callback function that gets fired when the element is dropped. This callback gets a property which is an array that holds all selected nodes

Methods:

When the function is saved into a variable var foo = dragSelect({...} you have access to all its inner functions. There are way more than listed here. Here are just the most usable:

method	properties	usage
stop	/	will teardown/stop the whole functionality
start	/	reset the functionality after a teardown
getSelection	/	returns all currently selected nodes
addSelectables	DOM elements (nodes)	adds elements that can be selected. Don’t worry, a smart algorythm makes sure that nodes are never added twice
removeSelectables	DOM elements (nodes)	remove elements that can be selected. Also removes the 'selected' class from those elements.

Classes

name	trigger
.ds-selected	on elements that are selected

Have Fun!