Animate 2020 HTML5 Canvas - Drag MC by clicking a smaller area inside of it

[andrea.grell]

Hey there, I am trying to make objects (shopping bags) on the main stage draggable and have actually managed to do that. But it would be really nice if the user could only drag the bags by "picking them up" at the handles.

For the bags itself I used the code shown below, it works well (with the draggable mc's being "bag1", "bag2", etc.). Inside the mcs of "bagx"is another movieclip with the handles called "bag_handle".

So, clicking and dragging "bag_handle" should move the whole "bag" MC where it's in.

Is that possible?

Here is the code I used for the regular dragging:

this.stop();
createjs.Touch.enable(stage);

var dragItems = [this.bag1, this.bag2];
for(var i = 0; i<dragItems.length; i++){	
	dragItems[i].on("mousedown", onMouseDown.bind(this));
	dragItems[i].on("pressmove", onMouseMove.bind(this));
};

function onMouseDown(evt) {
	var reg = evt.currentTarget.globalToLocal(evt.stageX, evt.stageY);
	var p = this.parent.globalToLocal(evt.stageX, evt.stageY);
	evt.currentTarget.regX = reg.x;
	evt.currentTarget.regY = reg.y;
	evt.currentTarget.x = p.x;
	evt.currentTarget.y = p.y;
};

function onMouseMove(evt) {
	var p = this.parent.globalToLocal(evt.stageX, evt.stageY);
	evt.currentTarget.x = p.x;
	evt.currentTarget.y = p.y;
	var item = evt.currentTarget;

    var pt = item.parent.globalToLocal(evt.stageX, evt.stageY);        
        item.x = pt.x - item.offset.x;
        item.y = pt.y - item.offset.y;
};

 Drag Bag Example Files (.fla, .html, .js)

Thank you!

[ClayUUID]

Intentionally limiting the drag target to just the handles sounds like a super annoying bad design. I know I'd hate it.

[JoãoCésar · Accepted solution]

Hi.

You can use the target property from the event object and check for the handles name.

Like this:

function onMouseDown(evt) {
	if (evt.target.parent.name === "bag_handle")
	{
		var reg = evt.currentTarget.globalToLocal(evt.stageX, evt.stageY);
		var p = this.parent.globalToLocal(evt.stageX, evt.stageY);
		evt.currentTarget.regX = reg.x;
		evt.currentTarget.regY = reg.y;
		evt.currentTarget.x = p.x;
		evt.currentTarget.y = p.y;
	}	
};

function onMouseMove(evt) {
	if (evt.target.parent.name === "bag_handle")
	{
		var p = this.parent.globalToLocal(evt.stageX, evt.stageY);
		evt.currentTarget.x = p.x;
		evt.currentTarget.y = p.y;
		var item = evt.currentTarget;
	}
};

Regards,

JC

[andrea.grell]

That worls perfectly! Thanks a lot 🙂

[JoãoCésar]

That's great! You're welcome!