README.md

Subjx(dragging/resizing/rotating)

Draggable, resizable, rotatable library for creating drag-n-drop applications.

Demos

Basic example

Drag, zoom and pan SVG

Usage

Library provides dragging/resizing/rotating/snapping SVG/HTML Elements.

Installation

Run npm install to install with npm.

npm install subjx

Including via a <script> tag:

<script src="../dist/js/subjx.js"></script>

Get started

Main function subjx returns array of Subjx instances which based on elements finded by passed parameters:

import subjx from 'subjx';
import 'subjx/dist/style/subjx.css';

// possible parameters
const xElem = subjx( 'selector' ) |
                subjx( element ) |
                subjx( elementArray );

Transformation(drag/resize/rotate)

// enabling tool by `drag` method with the optional parameters
// by default just call `.drag()`
const xDraggables = xElem.drag();

// method always returns array of new Draggable instances
// for disabling use `disable` method for each object
xDraggables.forEach(item => {
    item.disable();
});

"Draggable" API

const [xDraggable] = xDraggables;

// getter returns root DOM element of 'controls'
xDraggable.controls;

// provides access to useful options
xDraggable.storage;
// for example: to get reference to any handle's DOM
const {
  handles: { tl, tr, ...etc }
} = xDraggable.storage;

// enables dragging
// there is no need to call this method manually
xDraggable.enable(options);

// disables dragging, removes controls and handles
xDraggable.disable();

 // adds event listener for some events
xDraggable.on(eventName, cb);

// removes event listener for some events
xDraggable.off(eventName, cb);

// Event names
const EVENTS = [
    'dragStart',
    'drag',
    'dragEnd',
    'resizeStart',
    'resize',
    'resizeEnd',
    'rotateStart',
    'rotate',
    'rotateEnd'
];

// execute dragging manually
xDraggable.exeDrag({
    dx, // drag along the x axis
    dy // drag along the y axis
});

// execute resizing manually
xDraggable.exeResize({
    dx, // resize along the x axis
    dy, // resize along the y axis
    revX, // reverse resizing along the x axis
    revY, // reverse resizing along the y axis
    doW, // allow width resizing
    doH  // allow height resizing
});

// execute rotating manually
xDraggable.exeRotate({
    delta // radians
});

// Align element inside container: ['t', 'l', 'r', 'b', 'v', 'h']
xDraggable.applyAlignment('tr');

// Call this method when applying scale or viewBox values changing
// useful when element's container was transformed from outside
xDraggable.fitControlsToSize();

// Returns rotation point handle to default position
xDraggable.resetCenterPoint();

Options

Property	Description	Type	Default
container	Transformation coordinate system	'selector' | element	element.parentNode
controlsContainer	"controls" append to this element	'selector' | element	element.parentNode
axis	Constrain movement along an axis	string: 'x' | 'y' | 'xy'	'xy'
snap	Snapping to grid in pixels/radians	object	{ x: 10, y: 10, angle: 10 }
each	Mimic behavior with other '.draggable' elements	object	{ move: false, resize: false, rotate: false }
proportions	Keep aspect ratio when resizing	boolean	false
draggable	Allow or deny an action	boolean	true
resizable	Allow or deny an action	boolean	true
rotatable	Allow or deny an action	boolean	true
scalable	Applies scaling only to root element	boolean	false
restrict	Restricts element dragging/resizing/rotation	'selector' | element	-
rotatorAnchor	Rotator anchor direction	string: 'n' | 's' | 'w' | 'e'	'e'
rotatorOffset	Rotator offset	number	50

Notice: In most cases, it is recommended to use 'proportions' option

Methods

subjx('.draggable').drag({
    onInit(el) {
        // fires on tool activation
    },
    onMove({ clientX, clientY, dx, dy, transform }) {
        // fires on moving
    },
    onResize({ clientX, clientY, dx, dy, transform, width, height }) {
        // fires on resizing
    },
    onRotate({ clientX, clientY, delta, transform }) {
        // fires on rotation
    },
    onDrop({ clientX, clientY }) {
        // fires on drop
    },
    onDestroy(el) {
        // fires on tool deactivation
    }
});

Subscribing new draggable element to previously activated(useful with each option)

const observable = subjx.createObservable();
subjx('.draggable').drag({...}, observable);

const createDraggableAndSubscribe = e => {
    subjx(e.target).drag({...}, observable);
};

Allowed SVG elements: g, path, rect, ellipse, line, polyline, polygon, circle

Cloning

Options

const xCloneable = xElem.clone({
    // dropping area
    stack: 'selector',
    // set clone parent
    appendTo: 'selector',
    // set clone additional style
    style: {
        border: '1px dashed green',
        background: 'transparent'
    }
});

Methods

subjx('.cloneable').clone({
    onInit(el) {
        // fires on tool activation
    },
    onMove(dx, dy) {
        // fires on moving
    },
    onDrop(e) {
        // fires on drop
    },
    onDestroy() {
        // fires on tool deactivation
    }
});

Disabling

xCloneable.forEach(item => {
    item.disable();
});

License

MIT (c) Karen Sarksyan