Ask for dot net: Image cropping using jquery

jcrop.css

.jcrop-holder

{

text-align: left;

}

.jcrop-vline, .jcrop-hline

{

font-size: 0;

position: absolute;

background: white url('../images/Jcrop.gif') top left repeat;

opacity: .5;

*filter:alpha(opacity=50);

}

.jcrop-vline { height: 100%; width: 1px !important; }

.jcrop-hline { width: 100%; height: 1px !important; }

.jcrop-handle {

font-size: 1px;

width: 7px !important;

height: 7px !important;

border: 1px #eee solid;

background-color: #333;

*width: 9px;

*height: 9px;

}

.jcrop-tracker {

*background-color: gray;

width: 100%; height: 100%;

}

.custom .jcrop-vline,

.custom .jcrop-hline

{

background: yellow;

}

.custom .jcrop-handle

{

border-color: black;

background-color: #C7BB00;

-moz-border-radius: 3px;

-webkit-border-radius: 3px;

}

.coor

{

width:30px;

}

crop.js

function Init() {

$(function() {

$('#originalImage').Jcrop({

onChange: showCoords,

onSelect: showCoords

});

// Patch for IE to force "overflow: auto;"

document.getElementById("imgContainer").style["position"] = "relative";

}

function showCoords(c) {

$('#x1').val(c.x);

$('#y1').val(c.y);

$('#x2').val(c.x2);

$('#y2').val(c.y2);

$('#w').val(c.w);

$('#h').val(c.h);

};

function ValidateSelected() {

if (document.getElementById("w").value == "" || document.getElementById("w").value == "0"

|| document.getElementById("h").value == "" || document.getElementById("h").value == "0") {

alert("No area to crop was selected");

return false;

}

jcrop.js

/**

* jquery.Jcrop.js v0.9.8

* jQuery Image Cropping Plugin

* @author Kelly Hallman <khallman@gmail.com>

* Permission is hereby granted, free of charge, to any person

* obtaining a copy of this software and associated documentation

* files (the "Software"), to deal in the Software without

* restriction, including without limitation the rights to use,

* copy, modify, merge, publish, distribute, sublicense, and/or sell

* copies of the Software, and to permit persons to whom the

* Software is furnished to do so, subject to the following

* conditions:

* The above copyright notice and this permission notice shall be

* included in all copies or substantial portions of the Software.

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

* OTHER DEALINGS IN THE SOFTWARE.

* }}}

(function($) {

$.Jcrop = function(obj,opt)

{

// Initialization {{{

// Sanitize some options {{{

var obj = obj, opt = opt;

if (typeof(obj) !== 'object') obj = $(obj)[0];

if (typeof(opt) !== 'object') opt = { };

// Some on-the-fly fixes for MSIE...sigh

if (!('trackDocument' in opt))

{

opt.trackDocument = $.browser.msie ? false : true;

if ($.browser.msie && $.browser.version.split('.')[0] == '8')

opt.trackDocument = true;

}

if (!('keySupport' in opt))

opt.keySupport = $.browser.msie ? false : true;

// }}}

// Extend the default options {{{

var defaults = {

// Basic Settings

trackDocument: false,

baseClass: 'jcrop',

addClass: null,

// Styling Options

bgColor: 'black',

bgOpacity: .6,

borderOpacity: .4,

handleOpacity: .5,

handlePad: 5,

handleSize: 9,

handleOffset: 5,

edgeMargin: 14,

aspectRatio: 0,

keySupport: true,

cornerHandles: true,

sideHandles: true,

drawBorders: true,

dragEdges: true,

boxWidth: 0,

boxHeight: 0,

boundary: 8,

animationDelay: 20,

swingSpeed: 3,

allowSelect: true,

allowMove: true,

allowResize: true,

minSelect: [ 0, 0 ],

maxSize: [ 0, 0 ],

minSize: [ 0, 0 ],

// Callbacks / Event Handlers

onChange: function() { },

onSelect: function() { }

};

var options = defaults;

setOptions(opt);

// }}}

// Initialize some jQuery objects {{{

var $origimg = $(obj);

var $img = $origimg.clone().removeAttr('id').css({ position: 'absolute' });

$img.width($origimg.width());

$img.height($origimg.height());

$origimg.after($img).hide();

presize($img,options.boxWidth,options.boxHeight);

var boundx = $img.width(),

boundy = $img.height(),

$div = $('<div />')

.width(boundx).height(boundy)

.addClass(cssClass('holder'))

.css({

position: 'relative',

backgroundColor: options.bgColor

}).insertAfter($origimg).append($img);

;

if (options.addClass) $div.addClass(options.addClass);

//$img.wrap($div);

var $img2 = $('<img />')/*{{{*/

.attr('src',$img.attr('src'))

.css('position','absolute')

.width(boundx).height(boundy)

;/*}}}*/

var $img_holder = $('<div />')/*{{{*/

.width(pct(100)).height(pct(100))

.css({

zIndex: 310,

position: 'absolute',

overflow: 'hidden'

})

.append($img2)

;/*}}}*/

var $hdl_holder = $('<div />')/*{{{*/

.width(pct(100)).height(pct(100))

.css('zIndex',320);

/*}}}*/

var $sel = $('<div />')/*{{{*/

.css({

position: 'absolute',

zIndex: 300

})

.insertBefore($img)

.append($img_holder,$hdl_holder)

;/*}}}*/

var bound = options.boundary;

var $trk = newTracker().width(boundx+(bound*2)).height(boundy+(bound*2))

.css({ position: 'absolute', top: px(-bound), left: px(-bound), zIndex: 290 })

.mousedown(newSelection);

/* }}} */

// Set more variables {{{

var xlimit, ylimit, xmin, ymin;

var xscale, yscale, enabled = true;

var docOffset = getPos($img),

// Internal states

btndown, lastcurs, dimmed, animating,

shift_down;

// }}}

// Internal Modules {{{

var Coords = function()/*{{{*/

{

var x1 = 0, y1 = 0, x2 = 0, y2 = 0, ox, oy;

function setPressed(pos)/*{{{*/

{

var pos = rebound(pos);

x2 = x1 = pos[0];

y2 = y1 = pos[1];

};

/*}}}*/

function setCurrent(pos)/*{{{*/

{

var pos = rebound(pos);

ox = pos[0] - x2;

oy = pos[1] - y2;

x2 = pos[0];

y2 = pos[1];

};

/*}}}*/

function getOffset()/*{{{*/

{

return [ ox, oy ];

};

/*}}}*/

function moveOffset(offset)/*{{{*/

{

var ox = offset[0], oy = offset[1];

if (0 > x1 + ox) ox -= ox + x1;

if (0 > y1 + oy) oy -= oy + y1;

if (boundy < y2 + oy) oy += boundy - (y2 + oy);

if (boundx < x2 + ox) ox += boundx - (x2 + ox);

x1 += ox;

x2 += ox;

y1 += oy;

y2 += oy;

};

/*}}}*/

function getCorner(ord)/*{{{*/

{

var c = getFixed();

switch(ord)

{

case 'ne': return [ c.x2, c.y ];

case 'nw': return [ c.x, c.y ];

case 'se': return [ c.x2, c.y2 ];

case 'sw': return [ c.x, c.y2 ];

}

};

/*}}}*/

function getFixed()/*{{{*/

{

if (!options.aspectRatio) return getRect();

// This function could use some optimization I think...

var aspect = options.aspectRatio,

min_x = options.minSize[0]/xscale,

min_y = options.minSize[1]/yscale,

max_x = options.maxSize[0]/xscale,

max_y = options.maxSize[1]/yscale,

rw = x2 - x1,

rh = y2 - y1,

rwa = Math.abs(rw),

rha = Math.abs(rh),

real_ratio = rwa / rha,

xx, yy

;

if (max_x == 0) { max_x = boundx * 10 }

if (max_y == 0) { max_y = boundy * 10 }

if (real_ratio < aspect)

{

yy = y2;

w = rha * aspect;

xx = rw < 0 ? x1 - w : w + x1;

if (xx < 0)

{

xx = 0;

h = Math.abs((xx - x1) / aspect);

yy = rh < 0 ? y1 - h: h + y1;

}

else if (xx > boundx)

{

xx = boundx;

h = Math.abs((xx - x1) / aspect);

yy = rh < 0 ? y1 - h : h + y1;

}

else

{

xx = x2;

h = rwa / aspect;

yy = rh < 0 ? y1 - h : y1 + h;

if (yy < 0)

{

yy = 0;

w = Math.abs((yy - y1) * aspect);

xx = rw < 0 ? x1 - w : w + x1;

}

else if (yy > boundy)

{

yy = boundy;

w = Math.abs(yy - y1) * aspect;

xx = rw < 0 ? x1 - w : w + x1;

}

// Magic %-)

if(xx > x1) { // right side

if(xx - x1 < min_x) {

xx = x1 + min_x;

} else if (xx - x1 > max_x) {

xx = x1 + max_x;

}

if(yy > y1) {

yy = y1 + (xx - x1)/aspect;

} else {

yy = y1 - (xx - x1)/aspect;

}

} else if (xx < x1) { // left side

if(x1 - xx < min_x) {

xx = x1 - min_x

} else if (x1 - xx > max_x) {

xx = x1 - max_x;

}

if(yy > y1) {

yy = y1 + (x1 - xx)/aspect;

} else {

yy = y1 - (x1 - xx)/aspect;

}

if(xx < 0) {

x1 -= xx;

xx = 0;

} else if (xx > boundx) {

x1 -= xx - boundx;

xx = boundx;

}

if(yy < 0) {

y1 -= yy;

yy = 0;

} else if (yy > boundy) {

y1 -= yy - boundy;

yy = boundy;

}

return last = makeObj(flipCoords(x1,y1,xx,yy));

};

/*}}}*/

function rebound(p)/*{{{*/

{

if (p[0] < 0) p[0] = 0;

if (p[1] < 0) p[1] = 0;

if (p[0] > boundx) p[0] = boundx;

if (p[1] > boundy) p[1] = boundy;

return [ p[0], p[1] ];

};

/*}}}*/

function flipCoords(x1,y1,x2,y2)/*{{{*/

{

var xa = x1, xb = x2, ya = y1, yb = y2;

if (x2 < x1)

{

xa = x2;

xb = x1;

}

if (y2 < y1)

{

ya = y2;

yb = y1;

}

return [ Math.round(xa), Math.round(ya), Math.round(xb), Math.round(yb) ];

};

/*}}}*/

function getRect()/*{{{*/

{

var xsize = x2 - x1;

var ysize = y2 - y1;

if (xlimit && (Math.abs(xsize) > xlimit))

x2 = (xsize > 0) ? (x1 + xlimit) : (x1 - xlimit);

if (ylimit && (Math.abs(ysize) > ylimit))

y2 = (ysize > 0) ? (y1 + ylimit) : (y1 - ylimit);

if (ymin && (Math.abs(ysize) < ymin))

y2 = (ysize > 0) ? (y1 + ymin) : (y1 - ymin);

if (xmin && (Math.abs(xsize) < xmin))

x2 = (xsize > 0) ? (x1 + xmin) : (x1 - xmin);

if (x1 < 0) { x2 -= x1; x1 -= x1; }

if (y1 < 0) { y2 -= y1; y1 -= y1; }

if (x2 < 0) { x1 -= x2; x2 -= x2; }

if (y2 < 0) { y1 -= y2; y2 -= y2; }

if (x2 > boundx) { var delta = x2 - boundx; x1 -= delta; x2 -= delta; }

if (y2 > boundy) { var delta = y2 - boundy; y1 -= delta; y2 -= delta; }

if (x1 > boundx) { var delta = x1 - boundy; y2 -= delta; y1 -= delta; }

if (y1 > boundy) { var delta = y1 - boundy; y2 -= delta; y1 -= delta; }

return makeObj(flipCoords(x1,y1,x2,y2));

};

/*}}}*/

function makeObj(a)/*{{{*/

{

return { x: a[0], y: a[1], x2: a[2], y2: a[3],

w: a[2] - a[0], h: a[3] - a[1] };

};

/*}}}*/

return {

flipCoords: flipCoords,

setPressed: setPressed,

setCurrent: setCurrent,

getOffset: getOffset,

moveOffset: moveOffset,

getCorner: getCorner,

getFixed: getFixed

};

}();

/*}}}*/

var Selection = function()/*{{{*/

{

var start, end, dragmode, awake, hdep = 370;

var borders = { };

var handle = { };

var seehandles = false;

var hhs = options.handleOffset;

/* Insert draggable elements {{{*/

// Insert border divs for outline

if (options.drawBorders) {

borders = {

top: insertBorder('hline')

.css('top',$.browser.msie?px(-1):px(0)),

bottom: insertBorder('hline'),

left: insertBorder('vline'),

right: insertBorder('vline')

};

}

// Insert handles on edges

if (options.dragEdges) {

handle.t = insertDragbar('n');

handle.b = insertDragbar('s');

handle.r = insertDragbar('e');

handle.l = insertDragbar('w');

}

// Insert side handles

options.sideHandles &&

createHandles(['n','s','e','w']);

// Insert corner handles

options.cornerHandles &&

createHandles(['sw','nw','ne','se']);

/*}}}*/

// Private Methods

function insertBorder(type)/*{{{*/

{

var jq = $('<div />')

.css({position: 'absolute', opacity: options.borderOpacity })

.addClass(cssClass(type));

$img_holder.append(jq);

return jq;

};

/*}}}*/

function dragDiv(ord,zi)/*{{{*/

{

var jq = $('<div />')

.mousedown(createDragger(ord))

.css({

cursor: ord+'-resize',

position: 'absolute',

zIndex: zi

})

;

$hdl_holder.append(jq);

return jq;

};

/*}}}*/

function insertHandle(ord)/*{{{*/

{

return dragDiv(ord,hdep++)

.css({ top: px(-hhs+1), left: px(-hhs+1), opacity: options.handleOpacity })

.addClass(cssClass('handle'));

};

/*}}}*/

function insertDragbar(ord)/*{{{*/

{

var s = options.handleSize,

o = hhs,

h = s, w = s,

t = o, l = o;

switch(ord)

{

case 'n': case 's': w = pct(100); break;

case 'e': case 'w': h = pct(100); break;

}

return dragDiv(ord,hdep++).width(w).height(h)

.css({ top: px(-t+1), left: px(-l+1)});

};

/*}}}*/

function createHandles(li)/*{{{*/

{

for(i in li) handle[li[i]] = insertHandle(li[i]);

};

/*}}}*/

function moveHandles(c)/*{{{*/

{

var midvert = Math.round((c.h / 2) - hhs),

midhoriz = Math.round((c.w / 2) - hhs),

north = west = -hhs+1,

east = c.w - hhs,

south = c.h - hhs,

x, y;

'e' in handle &&

handle.e.css({ top: px(midvert), left: px(east) }) &&

handle.w.css({ top: px(midvert) }) &&

handle.s.css({ top: px(south), left: px(midhoriz) }) &&

handle.n.css({ left: px(midhoriz) });

'ne' in handle &&

handle.ne.css({ left: px(east) }) &&

handle.se.css({ top: px(south), left: px(east) }) &&

handle.sw.css({ top: px(south) });

'b' in handle &&

handle.b.css({ top: px(south) }) &&

handle.r.css({ left: px(east) });

};

/*}}}*/

function moveto(x,y)/*{{{*/

{

$img2.css({ top: px(-y), left: px(-x) });

$sel.css({ top: px(y), left: px(x) });

};

/*}}}*/

function resize(w,h)/*{{{*/

{

$sel.width(w).height(h);

};

/*}}}*/

function refresh()/*{{{*/

{

var c = Coords.getFixed();

Coords.setPressed([c.x,c.y]);

Coords.setCurrent([c.x2,c.y2]);

updateVisible();

};

/*}}}*/

// Internal Methods

function updateVisible()/*{{{*/

{ if (awake) return update(); };

/*}}}*/

function update()/*{{{*/

{

var c = Coords.getFixed();

resize(c.w,c.h);

moveto(c.x,c.y);

options.drawBorders &&

borders['right'].css({ left: px(c.w-1) }) &&

borders['bottom'].css({ top: px(c.h-1) });

seehandles && moveHandles(c);

awake || show();

options.onChange(unscale(c));

};

/*}}}*/

function show()/*{{{*/

{

$sel.show();

$img.css('opacity',options.bgOpacity);

awake = true;

};

/*}}}*/

function release()/*{{{*/

{

disableHandles();

$sel.hide();

$img.css('opacity',1);

awake = false;

};

/*}}}*/

function showHandles()//{{{

{

if (seehandles)

{

moveHandles(Coords.getFixed());

$hdl_holder.show();

}

};

//}}}

function enableHandles()/*{{{*/

{

seehandles = true;

if (options.allowResize)

{

moveHandles(Coords.getFixed());

$hdl_holder.show();

return true;

}

};

/*}}}*/

function disableHandles()/*{{{*/

{

seehandles = false;

$hdl_holder.hide();

};

/*}}}*/

function animMode(v)/*{{{*/

{

(animating = v) ? disableHandles(): enableHandles();

};

/*}}}*/

function done()/*{{{*/

{

animMode(false);

refresh();

};

/*}}}*/

var $track = newTracker().mousedown(createDragger('move'))

.css({ cursor: 'move', position: 'absolute', zIndex: 360 })

$img_holder.append($track);

disableHandles();

return {

updateVisible: updateVisible,

update: update,

release: release,

refresh: refresh,

setCursor: function (cursor) { $track.css('cursor',cursor); },

enableHandles: enableHandles,

enableOnly: function() { seehandles = true; },

showHandles: showHandles,

disableHandles: disableHandles,

animMode: animMode,

done: done

};

}();

/*}}}*/

var Tracker = function()/*{{{*/

{

var onMove = function() { },

onDone = function() { },

trackDoc = options.trackDocument;

if (!trackDoc)

{

$trk

.mousemove(trackMove)

.mouseup(trackUp)

.mouseout(trackUp)

;

}

function toFront()/*{{{*/

{

$trk.css({zIndex:450});

if (trackDoc)

{

$(document)

.mousemove(trackMove)

.mouseup(trackUp)

;

}

/*}}}*/

function toBack()/*{{{*/

{

$trk.css({zIndex:290});

if (trackDoc)

{

$(document)

.unbind('mousemove',trackMove)

.unbind('mouseup',trackUp)

;

}

/*}}}*/

function trackMove(e)/*{{{*/

{

onMove(mouseAbs(e));

};

/*}}}*/

function trackUp(e)/*{{{*/

{

e.preventDefault();

e.stopPropagation();

if (btndown)

{

btndown = false;

onDone(mouseAbs(e));

options.onSelect(unscale(Coords.getFixed()));

toBack();

onMove = function() { };

onDone = function() { };

}

return false;

};

/*}}}*/

function activateHandlers(move,done)/* {{{ */

{

btndown = true;

onMove = move;

onDone = done;

toFront();

return false;

};

/* }}} */

function setCursor(t) { $trk.css('cursor',t); };

$img.before($trk);

return {

activateHandlers: activateHandlers,

setCursor: setCursor

};

}();

/*}}}*/

var KeyManager = function()/*{{{*/

{

var $keymgr = $('<input type="radio" />')

.css({ position: 'absolute', left: '-30px' })

.keypress(parseKey)

.blur(onBlur),

$keywrap = $('<div />')

.css({

position: 'absolute',

overflow: 'hidden'

})

.append($keymgr)

;

function watchKeys()/*{{{*/

{

if (options.keySupport)

{

$keymgr.show();

$keymgr.focus();

}

};

/*}}}*/

function onBlur(e)/*{{{*/

{

$keymgr.hide();

};

/*}}}*/

function doNudge(e,x,y)/*{{{*/

{

if (options.allowMove) {

Coords.moveOffset([x,y]);

Selection.updateVisible();

};

e.preventDefault();

e.stopPropagation();

};

/*}}}*/

function parseKey(e)/*{{{*/

{

if (e.ctrlKey) return true;

shift_down = e.shiftKey ? true : false;

var nudge = shift_down ? 10 : 1;

switch(e.keyCode)

{

case 37: doNudge(e,-nudge,0); break;

case 39: doNudge(e,nudge,0); break;

case 38: doNudge(e,0,-nudge); break;

case 40: doNudge(e,0,nudge); break;

case 27: Selection.release(); break;

case 9: return true;

}

return nothing(e);

};

/*}}}*/

if (options.keySupport) $keywrap.insertBefore($img);

return {

watchKeys: watchKeys

};

}();

/*}}}*/

// }}}

// Internal Methods {{{

function px(n) { return '' + parseInt(n) + 'px'; };

function pct(n) { return '' + parseInt(n) + '%'; };

function cssClass(cl) { return options.baseClass + '-' + cl; };

function getPos(obj)/*{{{*/

{

// Updated in v0.9.4 to use built-in dimensions plugin

var pos = $(obj).offset();

return [ pos.left, pos.top ];

};

/*}}}*/

function mouseAbs(e)/*{{{*/

{

return [ (e.pageX - docOffset[0]), (e.pageY - docOffset[1]) ];

};

/*}}}*/

function myCursor(type)/*{{{*/

{

if (type != lastcurs)

{

Tracker.setCursor(type);

//Handles.xsetCursor(type);

lastcurs = type;

}

};

/*}}}*/

function startDragMode(mode,pos)/*{{{*/

{

docOffset = getPos($img);

Tracker.setCursor(mode=='move'?mode:mode+'-resize');

if (mode == 'move')

return Tracker.activateHandlers(createMover(pos), doneSelect);

var fc = Coords.getFixed();

var opp = oppLockCorner(mode);

var opc = Coords.getCorner(oppLockCorner(opp));

Coords.setPressed(Coords.getCorner(opp));

Coords.setCurrent(opc);

Tracker.activateHandlers(dragmodeHandler(mode,fc),doneSelect);

};

/*}}}*/

function dragmodeHandler(mode,f)/*{{{*/

{

return function(pos) {

if (!options.aspectRatio) switch(mode)

{

case 'e': pos[1] = f.y2; break;

case 'w': pos[1] = f.y2; break;

case 'n': pos[0] = f.x2; break;

case 's': pos[0] = f.x2; break;

}

else switch(mode)

{

case 'e': pos[1] = f.y+1; break;

case 'w': pos[1] = f.y+1; break;

case 'n': pos[0] = f.x+1; break;

case 's': pos[0] = f.x+1; break;

}

Coords.setCurrent(pos);

Selection.update();

};

/*}}}*/

function createMover(pos)/*{{{*/

{

var lloc = pos;

KeyManager.watchKeys();

return function(pos)

{

Coords.moveOffset([pos[0] - lloc[0], pos[1] - lloc[1]]);

lloc = pos;

Selection.update();

};

/*}}}*/

function oppLockCorner(ord)/*{{{*/

{

switch(ord)

{

case 'n': return 'sw';

case 's': return 'nw';

case 'e': return 'nw';

case 'w': return 'ne';

case 'ne': return 'sw';

case 'nw': return 'se';

case 'se': return 'nw';

case 'sw': return 'ne';

};

/*}}}*/

function createDragger(ord)/*{{{*/

{

return function(e) {

if (options.disabled) return false;

if ((ord == 'move') && !options.allowMove) return false;

btndown = true;

startDragMode(ord,mouseAbs(e));

e.stopPropagation();

e.preventDefault();

return false;

};

/*}}}*/

function presize($obj,w,h)/*{{{*/

{

var nw = $obj.width(), nh = $obj.height();

if ((nw > w) && w > 0)

{

nw = w;

nh = (w/$obj.width()) * $obj.height();

}

if ((nh > h) && h > 0)

{

nh = h;

nw = (h/$obj.height()) * $obj.width();

}

xscale = $obj.width() / nw;

yscale = $obj.height() / nh;

$obj.width(nw).height(nh);

};

/*}}}*/

function unscale(c)/*{{{*/

{

return {

x: parseInt(c.x * xscale), y: parseInt(c.y * yscale),

x2: parseInt(c.x2 * xscale), y2: parseInt(c.y2 * yscale),

w: parseInt(c.w * xscale), h: parseInt(c.h * yscale)

};

/*}}}*/

function doneSelect(pos)/*{{{*/

{

var c = Coords.getFixed();

if (c.w > options.minSelect[0] && c.h > options.minSelect[1])

{

Selection.enableHandles();

Selection.done();

}

else

{

Selection.release();

}

Tracker.setCursor( options.allowSelect?'crosshair':'default' );

};

/*}}}*/

function newSelection(e)/*{{{*/

{

if (options.disabled) return false;

if (!options.allowSelect) return false;

btndown = true;

docOffset = getPos($img);

Selection.disableHandles();

myCursor('crosshair');

var pos = mouseAbs(e);

Coords.setPressed(pos);

Tracker.activateHandlers(selectDrag,doneSelect);

KeyManager.watchKeys();

Selection.update();

e.stopPropagation();

e.preventDefault();

return false;

};

/*}}}*/

function selectDrag(pos)/*{{{*/

{

Coords.setCurrent(pos);

Selection.update();

};

/*}}}*/

function newTracker()

{

var trk = $('<div></div>').addClass(cssClass('tracker'));

$.browser.msie && trk.css({ opacity: 0, backgroundColor: 'white' });

return trk;

};

// }}}

// API methods {{{

function animateTo(a)/*{{{*/

{

var x1 = a[0] / xscale,

y1 = a[1] / yscale,

x2 = a[2] / xscale,

y2 = a[3] / yscale;

if (animating) return;

var animto = Coords.flipCoords(x1,y1,x2,y2);

var c = Coords.getFixed();

var animat = initcr = [ c.x, c.y, c.x2, c.y2 ];

var interv = options.animationDelay;

var x = animat[0];

var y = animat[1];

var x2 = animat[2];

var y2 = animat[3];

var ix1 = animto[0] - initcr[0];

var iy1 = animto[1] - initcr[1];

var ix2 = animto[2] - initcr[2];

var iy2 = animto[3] - initcr[3];

var pcent = 0;

var velocity = options.swingSpeed;

Selection.animMode(true);

var animator = function()

{

return function()

{

pcent += (100 - pcent) / velocity;

animat[0] = x + ((pcent / 100) * ix1);

animat[1] = y + ((pcent / 100) * iy1);

animat[2] = x2 + ((pcent / 100) * ix2);

animat[3] = y2 + ((pcent / 100) * iy2);

if (pcent < 100) animateStart();

else Selection.done();

if (pcent >= 99.8) pcent = 100;

setSelectRaw(animat);

};

}();

function animateStart()

{ window.setTimeout(animator,interv); };

animateStart();

};

/*}}}*/

function setSelect(rect)//{{{

{

setSelectRaw([rect[0]/xscale,rect[1]/yscale,rect[2]/xscale,rect[3]/yscale]);

};

//}}}

function setSelectRaw(l) /*{{{*/

{

Coords.setPressed([l[0],l[1]]);

Coords.setCurrent([l[2],l[3]]);

Selection.update();

};

/*}}}*/

function setOptions(opt)/*{{{*/

{

if (typeof(opt) != 'object') opt = { };

options = $.extend(options,opt);

if (typeof(options.onChange)!=='function')

options.onChange = function() { };

if (typeof(options.onSelect)!=='function')

options.onSelect = function() { };

};

/*}}}*/

function tellSelect()/*{{{*/

{

return unscale(Coords.getFixed());

};

/*}}}*/

function tellScaled()/*{{{*/

{

return Coords.getFixed();

};

/*}}}*/

function setOptionsNew(opt)/*{{{*/

{

setOptions(opt);

interfaceUpdate();

};

/*}}}*/

function disableCrop()//{{{

{

options.disabled = true;

Selection.disableHandles();

Selection.setCursor('default');

Tracker.setCursor('default');

};

//}}}

function enableCrop()//{{{

{

options.disabled = false;

interfaceUpdate();

};

//}}}

function cancelCrop()//{{{

{

Selection.done();

Tracker.activateHandlers(null,null);

};

//}}}

function destroy()//{{{

{

$div.remove();

$origimg.show();

};

//}}}

function interfaceUpdate(alt)//{{{

// This method tweaks the interface based on options object.

// Called when options are changed and at end of initialization.

{

options.allowResize ?

alt?Selection.enableOnly():Selection.enableHandles():

Selection.disableHandles();

Tracker.setCursor( options.allowSelect? 'crosshair': 'default' );

Selection.setCursor( options.allowMove? 'move': 'default' );

$div.css('backgroundColor',options.bgColor);

if ('setSelect' in options) {

setSelect(opt.setSelect);

Selection.done();

delete(options.setSelect);

}

if ('trueSize' in options) {

xscale = options.trueSize[0] / boundx;

yscale = options.trueSize[1] / boundy;

}

xlimit = options.maxSize[0] || 0;

ylimit = options.maxSize[1] || 0;

xmin = options.minSize[0] || 0;

ymin = options.minSize[1] || 0;

if ('outerImage' in options)

{

$img.attr('src',options.outerImage);

delete(options.outerImage);

}

Selection.refresh();

};

//}}}

// }}}

$hdl_holder.hide();

interfaceUpdate(true);

var api = {

animateTo: animateTo,

setSelect: setSelect,

setOptions: setOptionsNew,

tellSelect: tellSelect,

tellScaled: tellScaled,

disable: disableCrop,

enable: enableCrop,

cancel: cancelCrop,

focus: KeyManager.watchKeys,

getBounds: function() { return [ boundx * xscale, boundy * yscale ]; },

getWidgetSize: function() { return [ boundx, boundy ]; },

release: Selection.release,

destroy: destroy

};

$origimg.data('Jcrop',api);

return api;

};

$.fn.Jcrop = function(options)/*{{{*/

{

function attachWhenDone(from)/*{{{*/

{

var loadsrc = options.useImg || from.src;

var img = new Image();

img.onload = function() { $.Jcrop(from,options); };

img.src = loadsrc;

};

/*}}}*/

if (typeof(options) !== 'object') options = { };

// Iterate over each object, attach Jcrop

this.each(function()

{

// If we've already attached to this object

if ($(this).data('Jcrop'))

{

// The API can be requested this way (undocumented)

if (options == 'api') return $(this).data('Jcrop');

// Otherwise, we just reset the options...

else $(this).data('Jcrop').setOptions(options);

}

// If we haven't been attached, preload and attach

else attachWhenDone(this);

});

// Return "this" so we're chainable a la jQuery plugin-style!

return this;

};

/*}}}*/

})(jQuery);

Default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Cropping with jquery & ASP.NET - By Miron Abramson</title>

</head>

<table>

<tr>

<td>Original image

<div style="width: 400px; height: 400px; overflow: auto; border: solid 1px black;

padding: 10px; margin-bottom: 5px;" id="imgContainer">

</div>

<div>

</div>

<div>

<asp:Button runat="server" ID="btnCrop" OnClick="btnCrop_Click" Text="Crop" OnClientClick="return ValidateSelected();" />

</div>

</td>

Cropped image:

<div style="width: 400px; height: 400px; overflow: auto; border: solid 1px black;

padding: 10px; margin-bottom: 5px;">

<asp:Literal runat="server" ID="lblCroppedImage"></asp:Literal>

</div>

</td>

</tr>

</table>

</form>

</body>

</html>

Default.aspx.cs

using System;

using System.Web;

using System.Web.UI;

using System.Drawing;

using System.Drawing.Imaging;

using System.IO;

public partial class Default : System.Web.UI.Page

{

protected void btnCrop_Click(object sender, EventArgs e)

{

int X1 = Convert.ToInt32(Request.Form["x1"]);

int Y1 = Convert.ToInt32(Request["y1"]);

int X2 = Convert.ToInt32(Request.Form["x2"]);

int Y2 = Convert.ToInt32(Request.Form["y2"]);

int X = System.Math.Min(X1, X2);

int Y = System.Math.Min(Y1, Y2);

int w = Convert.ToInt32(Request.Form["w"]);

int h = Convert.ToInt32(Request.Form["h"]);

// That can be any image type (jpg,jpeg,png,gif) from any where in the local server

string originalFile = Server.MapPath("~/images/miautito.jpg");

using (Image img = Image.FromFile(originalFile))

{

using (System.Drawing.Bitmap _bitmap = new System.Drawing.Bitmap(w, h))

{

_bitmap.SetResolution(img.HorizontalResolution, img.VerticalResolution);

using (Graphics _graphic = Graphics.FromImage(_bitmap))

{

_graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

_graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

_graphic.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;

_graphic.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;

_graphic.DrawImage(img, 0, 0, w, h);

_graphic.DrawImage(img, new Rectangle(0, 0, w, h), X, Y, w, h, GraphicsUnit.Pixel);

string extension = Path.GetExtension(originalFile);

string croppedFileName = Guid.NewGuid().ToString();

string path = Server.MapPath("~/cropped/");

// If the image is a gif file, change it into png

if (extension.EndsWith("gif", StringComparison.OrdinalIgnoreCase))

{

extension = ".png";

}

string newFullPathName = string.Concat(path, croppedFileName, extension);

using (EncoderParameters encoderParameters = new EncoderParameters(1))

{

encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 100L);

_bitmap.Save(newFullPathName, GetImageCodec(extension), encoderParameters);

}

lblCroppedImage.Text = string.Format("<img src='cropped/{0}' alt='Cropped image'>", croppedFileName + extension);

}

/// <summary>

/// Find the right codec

/// </summary>

/// <param name="extension"></param>

/// <returns></returns>

public static ImageCodecInfo GetImageCodec(string extension)

{

extension = extension.ToUpperInvariant();

ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();

foreach (ImageCodecInfo codec in codecs)

{

if (codec.FilenameExtension.Contains(extension))

{

return codec;

}

return codecs[1];

}

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Friday 16 November 2012

Image cropping using jquery

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