jQuery resizable problem on rotated elements

Question

I am truing to do a jQuery UI resize on a div that is rotated with 77deg. The result is totally uncontrollable.

To replicate this please:

• Go to http://jqueryui.com/demos/resizable/
• Click on inspect with the Chrome/Mozila console the gray resizable element should be id="resizable".
• Apply -webkit-transform: rotate(77deg) or -moz-transform: rotate(77deg)
• Now try to resize that element

Is there a way to fix this? Thank you

Answer 1

Change the following functions in JQuery-ui resizable plugin

_mouseStart: function(event) {

var curleft, curtop, cursor,
o = this.options,
iniPos = this.element.position(),
el = this.element;

this.resizing = true;

// bugfix for http://dev.jquery.com/ticket/1749
if ( (/absolute/).test( el.css("position") ) ) {
    el.css({ position: "absolute", top: el.css("top"), left: el.css("left") });
} else if (el.is(".ui-draggable")) {
    el.css({ position: "absolute", top: iniPos.top, left: iniPos.left });
}

this._renderProxy();

curleft = num(this.helper.css("left"));
curtop = num(this.helper.css("top"));

if (o.containment) {
    curleft += $(o.containment).scrollLeft() || 0;
    curtop += $(o.containment).scrollTop() || 0;
}

//Store needed variables
this.offset = this.helper.offset();
this.position = { left: curleft, top: curtop };
this.size = this._helper ? { width: el.outerWidth(), height: el.outerHeight() } : { width: el.width(), height: el.height() };
this.originalSize = this._helper ? { width: el.outerWidth(), height: el.outerHeight() } : { width: el.width(), height: el.height() };
this.originalPosition = { left: curleft, top: curtop };
this.sizeDiff = { width: el.outerWidth() - el.width(), height: el.outerHeight() - el.height() };
this.originalMousePosition = { left: event.pageX, top: event.pageY };
var angle=0;
var matrix = $(el).css("-webkit-transform") ||
$(el).css("-moz-transform")    ||
$(el).css("-ms-transform")     ||
$(el).css("-o-transform")      ||
$(el).css("transform");
if(matrix !== 'none') {
    var values = matrix.split('(')[1].split(')')[0].split(',');
    var a = values[0];
    var b = values[1];
    var angle = Math.round(Math.atan2(b, a) * (180/Math.PI));
} 
else { 
    var angle = 0; 
}
if(angle < 0) 
    angle +=360;
this.angle = angle;
thi.rad = this.angle*Math.PI/180;
//Aspect Ratio
this.aspectRatio = (typeof o.aspectRatio === "number") ? o.aspectRatio : ((this.originalSize.width / this.originalSize.height) || 1);

cursor = $(el).find(".ui-resizable-" + this.axis).css("cursor");

$("body").css("cursor", cursor === "auto" ? this.axis + "-resize" : cursor);
var cornerItem = 0;
if(this.axis == 'ne')
    cornerItem = 3;
else if(this.axis == 'nw')
    cornerItem = 2;
else if(this.axis == 'sw')
    cornerItem = 1;
else if(this.axis == 'se')
    cornerItem = 0;
this.cornerItem = cornerItem;
var t1 = this.position.top;
var l1 = this.position.left;
var w1 = this.size.width;
var h1 = this.size.height;
var midX = l1 + w1/2;
var midY = t1 + h1/2;
var cornersX = [l1-midX, l1+w1-midX , l1+w1-midX, l1-midX];
var cornersY = [t1-midY, midY-(t1+h1), midY-t1, t1+h1-midY];
var newX = 1e10;
var newY = 1e10;
for (var i=0; i<4; i++) {
    if(i == this.cornerItem){
        this.prevX = cornersX[i]*Math.cos(this.rad) - cornersY[i]*Math.sin(this.rad) + midX;
        this.prevY = cornersX[i]*Math.sin(this.rad) + cornersY[i]*Math.cos(this.rad) + midY;
    }
}
el.addClass("ui-resizable-resizing");
this._propagate("start", event);
return true;
},

_mouseDrag: function(event) {
    //Increase performance, avoid regex
    var data,
    el = this.helper, props = {},
    smp = this.originalMousePosition,
    a = this.axis,
    prevTop = this.position.top,
    prevLeft = this.position.left,
    prevWidth = this.size.width,
    prevHeight = this.size.height;
    dx1 = (event.pageX-smp.left)||0,
    dy1 = (event.pageY-smp.top)||0;
    dx = ((dx1)*Math.cos(this.rad) + (dy1)*Math.sin(this.rad));
    dy =((dx1)*Math.sin(this.rad) - (dy1)*Math.cos(this.rad));
    el = this.element;
    var t1 = this.position.top;
    var l1 = this.position.left;
    var w1 = this.size.width;
    var h1 = this.size.height;
    var midX = l1 + w1/2;
    var midY = t1 + h1/2;
    var cornersX = [l1-midX, l1+w1-midX , l1+w1-midX, l1-midX];
    var cornersY = [t1-midY, midY-(t1+h1), midY-t1, t1+h1-midY];
    var newX = 1e10 , newY = 1e10 , curX =0, curY=0;
    for (var i=0; i<4; i++) {   
        if(i == this.cornerItem){
            newX = cornersX[i]*Math.cos(this.rad) - cornersY[i]*Math.sin(this.rad) + midX;
            newY = cornersX[i]*Math.sin(this.rad) + cornersY[i]*Math.cos(this.rad) + midY;
            curX = newX - this.prevX;
            curY = newY - this.prevY;
        }
    }
    trigger = this._change[a];
    if (!trigger) {
        return false;
    }

    // Calculate the attrs that will be change
    data = trigger.apply(this, [event, dx, dy]);

    // Put this in the mouseDrag handler since the user can start pressing shift while resizing
    this._updateVirtualBoundaries(event.shiftKey);
    if (this._aspectRatio || event.shiftKey) {
        data = this._updateRatio(data, event);
    }

    data = this._respectSize(data, event);

    this._updateCache(data);

    // plugins callbacks need to be called first
    this._propagate("resize", event);

    this.position.left = this.position.left - curX;
    this.position.top  = this.position.top - curY;
    if (this.position.top !== prevTop) {
        props.top = this.position.top + "px";
    }
    if (this.position.left !== prevLeft) {
        props.left = this.position.left + "px";
    }
    if (this.size.width !== prevWidth) {
        props.width = this.size.width + "px";
    }
    if (this.size.height !== prevHeight) {
        props.height = this.size.height + "px";
    }
    el.css(props);

    if (!this._helper && this._proportionallyResizeElements.length) {
        this._proportionallyResize();
    }

    // Call the user callback if the element was resized
    if ( ! $.isEmptyObject(props) ) {
        this._trigger("resize", event, this.ui());
    }


    return false;
},

_mouseStop: function(event) {

    this.resizing = false;
    var pr, ista, soffseth, soffsetw, s, left, top,
        o = this.options, that = this;

    if(this._helper) {

        pr = this._proportionallyResizeElements;
        ista = pr.length && (/textarea/i).test(pr[0].nodeName);
        soffseth = ista && $.ui.hasScroll(pr[0], "left") /* TODO - jump height */ ? 0 : that.sizeDiff.height;
        soffsetw = ista ? 0 : that.sizeDiff.width;

        s = { width: (that.helper.width()  - soffsetw), height: (that.helper.height() - soffseth) };
        left = (parseInt(that.element.css("left"), 10) + (that.position.left - that.originalPosition.left)) || null;
        top = (parseInt(that.element.css("top"), 10) + (that.position.top - that.originalPosition.top)) || null;

        if (!o.animate) {
            this.element.css($.extend(s, { top: top, left: left }));
        }

        that.helper.height(that.size.height);
        that.helper.width(that.size.width);

        if (this._helper && !o.animate) {
            this._proportionallyResize();
        }

    }

    $("body").css("cursor", "auto");
    this.element.removeClass("ui-resizable-resizing");

    this._propagate("stop", event);

    if (this._helper) {
        this.helper.remove();
    }
    return false;

},
_change: {
    e: function(event, dx, dy) {
        var cs = this.originalSize, sp = this.originalPosition,elwidth, elheight,lleft=0, ttop =0;
        if(this.axis == 'se'){
            elwidth = this.originalSize.width + dx;
            elheight = this.originalSize.height - dy;
            return { height: elheight , width: elwidth };
        }
        else{
            elwidth = this.originalSize.width + dx;
            elheight = this.originalSize.height + dy;
            return { height: elheight , width: elwidth };
        }
    },
    w: function(event, dx, dy) {
        var cs = this.originalSize, sp = this.originalPosition,elwidth, elheight,lleft=0, ttop =0;
        if(this.axis == 'nw'){
            elwidth = cs.width - dx;
            elheight = this.originalSize.height + dy;
            return { height: elheight , width: elwidth };

        }
        else{
            elwidth = cs.width - dx;
            elheight = this.originalSize.height - dy;
            return { height: elheight , width: elwidth };
        }
    },
    n: function(event, dx, dy) {
        var cs = this.originalSize, sp = this.originalPosition,elwidth, elheight,lleft=0, ttop =0;
        if(this.axis == 'nw'){
            elwidth = this.originalSize.width - dx;
            elheight = cs.height + dy;
            return { height: elheight , width: elwidth };
        }
        else{
            elwidth = this.originalSize.width + dx;
            elheight = cs.height + dy;
            return { height: elheight , width: elwidth };
        }               
    },
    s: function(event, dx, dy) {
        var cs = this.originalSize, sp = this.originalPosition,elwidth, elheight,lleft=0, ttop =0;
        if(this.axis == 'se'){
            elwidth = this.originalSize.width + dx;
            elheight = this.originalSize.height - dy;
            return { height: elheight , width: elwidth };
        }
        else {
            elwidth = this.originalSize.width - dx;
            elheight = this.originalSize.height - dy;
            return { height: elheight , width: elwidth };
        }
    },
    se: function(event, dx, dy) {
        return $.extend(this._change.s.apply(this, arguments), this._change.e.apply(this, [event, dx, dy]));
    },
    sw: function(event, dx, dy) {
        return $.extend(this._change.s.apply(this, arguments), this._change.w.apply(this, [event, dx, dy]));
    },
    ne: function(event, dx, dy) {
        return $.extend(this._change.n.apply(this, arguments), this._change.e.apply(this, [event, dx, dy]));
    },
    nw: function(event, dx, dy) {
        return $.extend(this._change.n.apply(this, arguments), this._change.w.apply(this, [event, dx, dy]));
    }
},