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<title>Jcrop » Tutorials » API Demo</title>
<script src="../js/jquery.min.js" type="text/javascript"></script>
<script src="../js/jquery.Jcrop.js" type="text/javascript"></script>
<link rel="stylesheet" href="../css/jquery.Jcrop.css" type="text/css" />
<link rel="stylesheet" href="demo_files/demos.css" type="text/css" />
<style type="text/css">
.optdual { position: relative; }
.optdual .offset { position: absolute; left: 18em; }
.optlist label { width: 16em; display: block; }
#dl_links { margin-top: .5em; }
</style>
<script type="text/javascript">
jQuery(function($){
// The variable jcrop_api will hold a reference to the
// Jcrop API once Jcrop is instantiated.
var jcrop_api;
// In this example, since Jcrop may be attached or detached
// at the whim of the user, I've wrapped the call into a function
initJcrop();
// The function is pretty simple
function initJcrop()//{{{
{
// Hide any interface elements that require Jcrop
// (This is for the local user interface portion.)
$('.requiresjcrop').hide();
// Invoke Jcrop in typical fashion
$('#target').Jcrop({
onRelease: releaseCheck
},function(){
jcrop_api = this;
jcrop_api.animateTo([100,100,400,300]);
// Setup and dipslay the interface for "enabled"
$('#can_click,#can_move,#can_size').attr('checked','checked');
$('#ar_lock,#size_lock,#bg_swap').attr('checked',false);
$('.requiresjcrop').show();
});
};
//}}}
// Use the API to find cropping dimensions
// Then generate a random selection
// This function is used by setSelect and animateTo buttons
// Mainly for demonstration purposes
function getRandom() {
var dim = jcrop_api.getBounds();
return [
Math.round(Math.random() * dim[0]),
Math.round(Math.random() * dim[1]),
Math.round(Math.random() * dim[0]),
Math.round(Math.random() * dim[1])
];
};
// This function is bound to the onRelease handler...
// In certain circumstances (such as if you set minSize
// and aspectRatio together), you can inadvertently lose
// the selection. This callback re-enables creating selections
// in such a case. Although the need to do this is based on a
// buggy behavior, it's recommended that you in some way trap
// the onRelease callback if you use allowSelect: false
function releaseCheck()
{
jcrop_api.setOptions({ allowSelect: true });
$('#can_click').attr('checked',false);
};
// Attach interface buttons
// This may appear to be a lot of code but it's simple stuff
$('#setSelect').click(function(e) {
// Sets a random selection
jcrop_api.setSelect(getRandom());
});
$('#animateTo').click(function(e) {
// Animates to a random selection
jcrop_api.animateTo(getRandom());
});
$('#release').click(function(e) {
// Release method clears the selection
jcrop_api.release();
});
$('#disable').click(function(e) {
// Disable Jcrop instance
jcrop_api.disable();
// Update the interface to reflect disabled state
$('#enable').show();
$('.requiresjcrop').hide();
});
$('#enable').click(function(e) {
// Re-enable Jcrop instance
jcrop_api.enable();
// Update the interface to reflect enabled state
$('#enable').hide();
$('.requiresjcrop').show();
});
$('#rehook').click(function(e) {
// This button is visible when Jcrop has been destroyed
// It performs the re-attachment and updates the UI
$('#rehook,#enable').hide();
initJcrop();
$('#unhook,.requiresjcrop').show();
return false;
});
$('#unhook').click(function(e) {
// Destroy Jcrop widget, restore original state
jcrop_api.destroy();
// Update the interface to reflect un-attached state
$('#unhook,#enable,.requiresjcrop').hide();
$('#rehook').show();
return false;
});
// Hook up the three image-swapping buttons
$('#img1').click(function(e) {
jcrop_api.setImage('demo_files/sago.jpg');
jcrop_api.setOptions({ bgOpacity: .6 });
return false;
});
$('#img2').click(function(e) {
jcrop_api.setImage('demo_files/pool.jpg');
jcrop_api.setOptions({ bgOpacity: .6 });
return false;
});
$('#img3').click(function(e) {
jcrop_api.setImage('demo_files/sago.jpg',function(){
this.setOptions({
bgOpacity: 1,
outerImage: 'demo_files/sagomod.jpg'
});
this.animateTo(getRandom());
});
return false;
});
// The checkboxes simply set options based on it's checked value
// Options are changed by passing a new options object
// Also, to prevent strange behavior, they are initially checked
// This matches the default initial state of Jcrop
$('#can_click').change(function(e) {
jcrop_api.setOptions({ allowSelect: !!this.checked });
jcrop_api.focus();
});
$('#can_move').change(function(e) {
jcrop_api.setOptions({ allowMove: !!this.checked });
jcrop_api.focus();
});
$('#can_size').change(function(e) {
jcrop_api.setOptions({ allowResize: !!this.checked });
jcrop_api.focus();
});
$('#ar_lock').change(function(e) {
jcrop_api.setOptions(this.checked?
{ aspectRatio: 4/3 }: { aspectRatio: 0 });
jcrop_api.focus();
});
$('#size_lock').change(function(e) {
jcrop_api.setOptions(this.checked? {
minSize: [ 80, 80 ],
maxSize: [ 350, 350 ]
}: {
minSize: [ 0, 0 ],
maxSize: [ 0, 0 ]
});
jcrop_api.focus();
});
});
</script>
</head>
<body>
<div id="outer">
<div class="jcExample">
<div class="article">
<h1>Jcrop - API Demo</h1>
<img src="demo_files/sago.jpg" id="target" alt="Jcrop Image" />
<div style="margin: .8em 0 .5em;">
<span class="requiresjcrop">
<button id="setSelect">setSelect</button>
<button id="animateTo">animateTo</button>
<button id="release">Release</button>
<button id="disable">Disable</button>
</span>
<button id="enable" style="display:none;">Re-Enable</button>
<button id="unhook">Destroy!</button>
<button id="rehook" style="display:none;">Attach Jcrop</button>
</div>
<fieldset class="optdual requiresjcrop">
<legend>Option Toggles</legend>
<div class="optlist offset">
<label><input type="checkbox" id="ar_lock" />Aspect ratio</label>
<label><input type="checkbox" id="size_lock" />minSize/maxSize setting</label>
</div>
<div class="optlist">
<label><input type="checkbox" id="can_click" />Allow new selections</label>
<label><input type="checkbox" id="can_move" />Selection can be moved</label>
<label><input type="checkbox" id="can_size" />Resizable selection</label>
</div>
</fieldset>
<fieldset class="requiresjcrop" style="margin: .5em 0;">
<legend>Change Image</legend>
<span>
<button id="img2">Pool</button>
<button id="img1">Sago</button>
<button id="img3">Sago w/ outerImage</button>
</span>
</fieldset>
<div id="dl_links">
<a href="http://deepliquid.com/content/Jcrop.html">Jcrop Home</a> |
<a href="http://deepliquid.com/content/Jcrop_Manual.html">Manual (Docs)</a>
</div>
</div>
</div>
</div>
</body>
</html>
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