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/**
* Avatar cropping
*/
elgg.provide('elgg.avatarCropper');
/**
* Register the avatar cropper.
*
* If the hidden inputs have the coordinates from a previous cropping, begin
* the selection and preview with that displayed.
*/
elgg.avatarCropper.init = function() {
var params = {
selectionOpacity: 0,
aspectRatio: '1:1',
onSelectEnd: elgg.avatarCropper.selectChange,
onSelectChange: elgg.avatarCropper.preview
};
if ($('input[name=x2]').val()) {
params.x1 = $('input[name=x1]').val();
params.x2 = $('input[name=x2]').val();
params.y1 = $('input[name=y1]').val();
params.y2 = $('input[name=y2]').val();
}
$('#user-avatar-cropper').imgAreaSelect(params);
if ($('input[name=x2]').val()) {
var ias = $('#user-avatar-cropper').imgAreaSelect({instance: true});
var selection = ias.getSelection();
elgg.avatarCropper.preview($('#user-avatar-cropper'), selection);
}
};
/**
* Handler for changing select area.
*
* @param {Object} reference to the image
* @param {Object} imgareaselect selection object
* @return void
*/
elgg.avatarCropper.preview = function(img, selection) {
// catch for the first click on the image
if (selection.width == 0 || selection.height == 0) {
return;
}
var origWidth = $("#user-avatar-cropper").width();
var origHeight = $("#user-avatar-cropper").height();
var scaleX = 100 / selection.width;
var scaleY = 100 / selection.height;
$('#user-avatar-preview > img').css({
width: Math.round(scaleX * origWidth) + 'px',
height: Math.round(scaleY * origHeight) + 'px',
marginLeft: '-' + Math.round(scaleX * selection.x1) + 'px',
marginTop: '-' + Math.round(scaleY * selection.y1) + 'px'
});
};
/**
* Handler for updating the form inputs after select ends
*
* @param {Object} reference to the image
* @param {Object} imgareaselect selection object
* @return void
*/
elgg.avatarCropper.selectChange = function(img, selection) {
$('input[name=x1]').val(selection.x1);
$('input[name=x2]').val(selection.x2);
$('input[name=y1]').val(selection.y1);
$('input[name=y2]').val(selection.y2);
};
elgg.register_hook_handler('init', 'system', elgg.avatarCropper.init);
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