DEfusion. org. uk » Java. Script Image Cropper UI, using Prototype & script. About The Java. Script image cropper UI allows the user to crop an image using an interface with the same features and styling as found in commercial image editing software, and is is based on the Prototype Java. Script framework and script.
Initially I performed quite a lot of searching for some ready made solutions to meet my requirements, but found none that had the complete feature set that I required or any complete versions based on Prototype. So after a week and a half of work, I present the Java. Script image cropper UI, built on Prototype & script. Usage Extract to a directory of your choosing e.
Prototype & script. HTML: < scripttype="text/javascript"src="scripts/cropper/lib/prototype. Optionsratio. Dim obj. The pixel dimensions to apply as a restrictive ratio, with properties x & y. Width int. The minimum width for the select area in pixels. Height int. The mimimum height for the select area in pixels.
Width int. The maximum width for the select areas in pixels (if both min. Width & max. Width set to same the width of the cropper will be fixed)max. Height int. The maximum height for the select areas in pixels (if both min.
Height & max. Height set to same the height of the cropper will be fixed)display. On. Init int. Whether to display the select area on initialisation, only used when providing minimum width & height or ratio.
End. Crop func. The callback function to provide the crop details to on end of a crop. Keys boolean. Whether to capture the keys for moving the select area, as these can cause some problems at the moment. Coords obj. A coordinates object with properties x. The callback function The callback function is a function that allows you to capture the crop co- ordinates when the user finished a crop movement, it is passed two arguments: coords, obj, coordinates object with properties x. An example function which outputs the crop values to form fields: Java. Script: function on.
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- Features. Un-obtrusive; Based on Prototype and script.aculo.us; Image editing package styling & functionality, the crop area functions and looks like those found in.
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End. Crop( coords, dimensions ){ $('x. Basic interface This basic example will attach the cropper UI to the test image and return crop results to the provided callback function. HTML: < imgsrc="test. Test image"id="test. Image"width="5. 00"height="3.
Event. observe( window, 'load', function() { new Cropper. Img( 'test. Image', { on. End. Crop: on. End.
Crop } ); } ); < /script> Minimum dimensions You can apply minimum dimensions to a single axis or both, this example applies minimum dimensions to both axis. HTML: < imgsrc="test. Test image"id="test. Image"width="5. 00"height="3.
Event. observe( window, 'load', function() { new Cropper. Img( 'test. Image', { min.
Width: 2. 20, min. Height: 1. 20, on. End. Crop: on. End. Crop } ); } ); < /script> Select area ratio You can apply a ratio to the selection area, this example applies a 4: 3 ratio to the select area. HTML: < imgsrc="test. Test image"id="test. Image"width="5. 00"height="3.
Event. observe( window, 'load', function() { new Cropper. Img( 'test. Image', { ratio. Dim: { x: 2. On. Init: true, on. End. Crop: on. End.
Crop } ); } ); < /script> With crop preview You can display a dynamically produced preview of the resulting crop by using the Img. With. Preview subclass, a preview can only be displayed when we have a fixed size (set via min. Width & min. Height options). Note that the display. On. Init option is not required as this is the default behaviour when displaying a crop preview.
HTML: < imgsrc="test. Test image"id="test. Image"width="5. 00"height="3. Wrap"> < /div> < scripttype="text/javascript"language="javascript"> Event.
Cropper. Img. With. Preview( 'test. Image', { preview. Wrap: 'preview. Wrap', min. Width: 1. 20, min. Height: 1. 20, ratio.
Dim: { x: 2. 00, y: 1. End. Crop: on. End. Crop } ); } ); < /script>.