srcissors

Image cropping for responsive images. (~5kB minified and gzipped)

Js

// Initialize srcissors
var cropper = srcissors.new({
  arena: $('.crop-arena'),
  url: "/images/diagonal.jpg",
  fixedWidth: 300,
  minRatio: 1/1.5,
  maxRatio: 1.5/1
});

// Set a crop
cropper.setCrop({
  x: 1096,
  y: 461,
  width: 700,
  height: 500
})

// Get the current crop
cropper.getCrop();

// Set a ratio
cropper.setRatio(4/3);

// Reset to show the full image without any crop applied
cropper.reset();

// Set a new url
cropper.setImage('/images/storytelling-painting.jpg');

// Listen for the ready event (only fired once)
cropper.on('ready', function() {
    // your code
});

// Listen for image load events
cropper.on('load', function() {
    // your code
});

cropper.on('change', function(crop) {
    var x, y, width, height;
    x = crop.x;
    y = crop.y;
    width = crop.width;
    height = crop.height;
});

Configuration Options

Parameter	Type
arena	jQuery element
url	String	Url of the image to load
crop	Object	{x, y, width, height} Initial crop. The same as calling setCrop()
minResolution	The minimal resolution required from the resulting image.
fixedWidth, fixedHeight	Number	Will fix the preview width and only allow for resizes in the other axis.
minWidth, minHeight	Number	Minimum width or height the preview can be.
minRatio, maxRatio	Number	Prohibit extreme image ratios with these settings.
maxArea	Number	e.g. 0.8 means max 80% of the area will be covered by the image. This makes for smoth transitions between wide and tall image formats.
zoomStep	Number	e.g. 1.25 means every zoom will enlarge the preview by 25%.
actions	Object	{pan, zoomOnDoubleClick, resize } Allowed user interactions. By default they are all set to true.
showSurroundingImage	String	{always, never, panning } Shows the uncropped part of the image. By default set to never.
surroundingImageOpacity	Number	{0.0 - 1.0} Sets the opacity when showing the uncropped part of the image. By default set to 0.2.
originalSize	Object	Original image size, can be used to display a downscaled version of the image in the cropping interface, but use the original size for crop attributes; e.g. {width: 4000, height: 3000}.

HTML

This is the basic HTML used by srcissors in the examples. The zoom controls are not needed by the script and you need create the click events for zooming yourself. Have a look at how it can be done in examples/index.html.

There are also more setups for you to look at in examples/fit-to-area.html and examples/small-image.html.

<div class="crop-arena">
  <div class="crop-view">
    <!-- Outline -->
    <div class="crop-outline"></div>

    <!-- zoom controls -->
    <div class="top-left">
        <div class="crop-zoom-controls crop-zoom-controls--outside">
          <a class="icon-zoom icon-zoom-in" href="#" title="Zoom in"></a>
          <a class="icon-zoom icon-zoom-out" href="#" title="Zoom out"></a>
        </div>
    </div>

    <!-- image -->
    <div class="crop-preview clip-content cover-all"></div>

  </div>
</div>

Css

All the UI elements are styled with CSS. Just start with the CSS from examples/css/srcissors.css.

Development

# Watch for changes and fire up a webserver with livereload
npm run start

# Run the tests with karma
npm run test

# Run the tests in the major browsers (Chrome,Firefox,Safari,Electron)
npm run test:browsers

# Run tests and build scrissors.js and scrissors.min.js
npm run build

# Publish the module to npm
npm run build && npm version minor && git push && npm publish

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Licence

Copyright (c) 2015 upfront GmbH

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (LGPL) as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.