?? example-dynamicimage.htm
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="en-us" />
<title>Dynamic image test</title>
<script src="../lib/prototype.js" type="text/javascript"></script>
<script src="../lib/scriptaculous.js?load=builder,dragdrop" type="text/javascript"></script>
<script src="../cropper.js" type="text/javascript"></script>
<script type="text/javascript" charset="utf-8">
/**
* A little manager that allows us to swap the image dynamically
*
*/
var CropImageManager = {
/**
* Holds the current Cropper.Img object
* @var obj
*/
curCrop: null,
/**
* Initialises the cropImageManager
*
* @access public
* @return void
*/
init: function() {
this.attachCropper();
},
/**
* Handles the changing of the select to change the image, the option value
* is a pipe seperated list of imgSrc|width|height
*
* @access public
* @param obj event
* @return void
*/
onChange: function( e ) {
var vals = $F( Event.element( e ) ).split('|');
this.setImage( vals[0], vals[1], vals[2] );
},
/**
* Sets the image within the element & attaches/resets the image cropper
*
* @access private
* @param string Source path of new image
* @param int Width of new image in pixels
* @param int Height of new image in pixels
* @return void
*/
setImage: function( imgSrc, w, h ) {
$( 'testImage' ).src = imgSrc;
$( 'testImage' ).width = w;
$( 'testImage' ).height = h;
this.attachCropper();
},
/**
* Attaches/resets the image cropper
*
* @access private
* @return void
*/
attachCropper: function() {
if( this.curCrop == null ) this.curCrop = new Cropper.Img( 'testImage', { onEndCrop: onEndCrop } );
else this.curCrop.reset();
},
/**
* Removes the cropper
*
* @access public
* @return void
*/
removeCropper: function() {
if( this.curCrop != null ) {
this.curCrop.remove();
}
},
/**
* Resets the cropper, either re-setting or re-applying
*
* @access public
* @return void
*/
resetCropper: function() {
this.attachCropper();
}
};
// setup the callback function
function onEndCrop( coords, dimensions ) {
$( 'x1' ).value = coords.x1;
$( 'y1' ).value = coords.y1;
$( 'x2' ).value = coords.x2;
$( 'y2' ).value = coords.y2;
$( 'width' ).value = dimensions.width;
$( 'height' ).value = dimensions.height;
}
// basic example
Event.observe(
window,
'load',
function() {
CropImageManager.init();
Event.observe( $('removeCropper'), 'click', CropImageManager.removeCropper.bindAsEventListener( CropImageManager ), false );
Event.observe( $('resetCropper'), 'click', CropImageManager.resetCropper.bindAsEventListener( CropImageManager ), false );
Event.observe( $('imageChoice'), 'change', CropImageManager.onChange.bindAsEventListener( CropImageManager ), false );
}
);
/*
if( typeof(dump) != 'function' ) {
Debug.init(true, '/');
function dump( msg ) {
Debug.raise( msg );
};
} else dump( '---------------------------------------\n' );
*/
</script>
<link rel="stylesheet" type="text/css" href="debug.css" media="all" />
<style type="text/css">
label {
clear: left;
margin-left: 50px;
float: left;
width: 5em;
}
html, body {
margin: 0;
}
#testWrap {
margin: 20px 0 0 50px; /* Just while testing, to make sure we return the correct positions for the image & not the window */
}
</style>
</head>
<body>
<h2>Dynamic image test</h2>
<p>
Test of dynamically changing images or removing & re-applying the cropper
</p>
<div id="testWrap">
<img src="castle.jpg" alt="test image" id="testImage" width="500" height="333" />
</div>
<p>
<label for="imageChoice">image:</label>
<select name="imageChoice" id="imageChoice">
<option value="castle.jpg|500|333">Castle</option>
<option value="poppy.jpg|311|466">Flower</option>
</select>
</p>
<p>
<input type="button" id="removeCropper" value="Remove Cropper" />
<input type="button" id="resetCropper" value="Reset Cropper" /> </p>
<p>
<label for="x1">x1:</label>
<input type="text" name="x1" id="x1" />
</p>
<p>
<label for="y1">y1:</label>
<input type="text" name="y1" id="y1" />
</p>
<p>
<label for="x2">x2:</label>
<input type="text" name="x2" id="x2" />
</p>
<p>
<label for="y2">y2:</label>
<input type="text" name="y2" id="y2" />
</p>
<p>
<label for="width">width:</label>
<input type="text" name="width" id="width" />
</p>
<p>
<label for="height">height</label>
<input type="text" name="height" id="height" />
</p>
</body>
</html>
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