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Resizing object with draggable, scale value adds resistance!

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Warning: Please note

This thread was started before GSAP 3 was released. Some information, especially the syntax, may be out of date for GSAP 3. Please see the GSAP 3 migration guide and release notes for more information about how to update the code to GSAP 3's syntax. 

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Hello,

 

I am implementing a basic resizeable object which works perfectly (without using scaling).

When I add some scaling to the resizing object then I feel drag resistance when resizing.

The resistance happens when I resize, not when I drag the box, also the object top left moves leftward and does not fully enlarge or shrink following the mouse.

Do you have any idea on how to correct for the scaling factor so that the resize handle nicely follows the mouse?

I think this problem is similar to http://greensock.com/forums/topic/9279-draggable-with-css-scaling/ but I couldn't really figure out the fix.

$(document).ready(function(){
  var drag = $("#draggable");
  var handle = $("<div class='resize-handle'></div>").appendTo(drag);
  TweenLite.set(drag, {scale: 2}); // <<--- this adds resistance <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
  TweenLite.set(handle, {top: drag.width(), left: drag.height()});
  
  var dragInst;
  dragInst = Draggable.create(drag, {
        bounds: "body",
        edgeResistance: 0.85
      });
  
  var arrowdragInst;
  arrowdragInst = Draggable.create(handle, {
    type:"top,left",
    edgeResistance: 0.85,
    
    onPress: function(e) {
      e.stopPropagation(); // cancel drag    
      /*console.log("$(this.target).position().left = " + $(this.target).offset().left);
      console.log("$('body').width() = " + $("body").width());
      console.log($("body").width() - $(this.target).offset().left);*/
      this.applyBounds({top:100, left:100, width: ($("body").width() - $(this.target).offset().left + (this.x - 60)),
                        height: ($("body").height() - $(this.target).offset().top) +  + (this.y - 60)});
    },
    onDrag: function(e) {
      TweenLite.set(this.target.parentNode, { width: this.x, height: this.y });
    }
  });  
      
  $("body").on("mouseleave", function(e) {
    console.log("mouseleave body");
    dragInst[0].endDrag(e);
    arrowdragInst[0].endDrag(e);
  });
    
});

See the Pen xGOaeX by anon (@anon) on CodePen

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  • Solution

It looks like the main problem is that you've got your transform using the default origin (center), but your resizing/dragging logic is assuming top left. So try adding transformOrigin:"left top" to your scale tween/set:

TweenLite.set(drag, {scale: 2, transformOrigin:"top left"});

Is that what you're looking for? 

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Yes that's it thanks.

I'll ask my boss for the business membership here, it's very cool.

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