Creating Drag-and-Drop Functionality with Edge Animate
Illustration by John Hersey

Creating a droppable target


From:

Creating Drag-and-Drop Functionality with Edge Animate

with Paul Trani

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Video: Creating a droppable target

After you've made items draggable, your next step is to make them droppable. And in this case, I want to be able to drag the eyes and the mouth over here, and drop them on to this monster body. First thing you'll notice is you have a depth issue. So I need to fix that depth issue. And, when I drop it on that monster body I want them to stay put. And maybe even play an animation, when you drop them on that monster body. All right, so let's fix the depth issue first. As I go into Edge Animate.
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Watch the Online Video Course Creating Drag-and-Drop Functionality with Edge Animate
1h 14m Beginner Jul 01, 2014

Viewers: in countries Watching now:

Drag-and-drop functionality is perfect for any game or interactive web project. Edge Animate makes it easy to implement. Plus, the drag-and-drop interactions you add work even on smartphones and tablets. Learn how to create draggable objects, add target areas where users can drop them, create reactions to those drops, and change content and object positioning accordingly. Author Paul Trani walks you through each step of the process in this project-based course.

Topics include:
  • Creating graphics and importing them into Edge Animate
  • Adding animation and interactivity
  • Making items draggable
  • Adding a droppable target area
  • Controlling multiple objects
  • Resetting positions of objects
  • Testing and publishing your project
Subject:
Web
Software:
Edge Animate
Author:
Paul Trani

Creating a droppable target

After you've made items draggable, your next step is to make them droppable. And in this case, I want to be able to drag the eyes and the mouth over here, and drop them on to this monster body. First thing you'll notice is you have a depth issue. So I need to fix that depth issue. And, when I drop it on that monster body I want them to stay put. And maybe even play an animation, when you drop them on that monster body. All right, so let's fix the depth issue first. As I go into Edge Animate.

And that is done using your Elements panel, so open up your Elements panel. If it's not open, just check it right here under Window and at this point you can see the monster body is above, the mouth and eyes. So just take it and drag it beneath everything except for the background. All right, so we solved that depth issue. Now, my next step is to take advantage of jQuery UI. In fact, as I select these eyes right down here, I want to open up the actions for the eyes. And I'm already taking advantage of draggable.

But I want to take advantage of droppable now. Here's Jqueryui.com, I'm already using Draggable as I take a look at Droppable, I can see I get an example right here I can play with it, I can check out additional examples if I want to, but I want to show you actually what you have available in terms of your documentation. This is where I want to reference all the options, methods and events available to you, for a Droppable. So I want to select accept, because for droppable, I want to accept a specific object.

So basically what this line says is, the monster body. Is going to be droppable, and it will accept the eyes or the mouth. So, that's what I want to do. So going back into Edge Animate, you can see that line is pretty similar. In fact, I'm going to take the first part of this line for Draggable, because they're both structured the same. The symbol's going to be the eyes, but it's actually not going to be the eyes in this case. It's going to be, monsterBody. So targeting the monster body, it's going to be droppable, so you can put things on it.

And what will it accept? Well between those parentheses, and between curly braces, that's where you're going to put any parameters you want to add. Just like I did, right up here. Now I'm going to space this out a little bit more just to give me some room and I'm going to. Poke the tab key to indent it. And, going back onto jqueryui.com, I want to accept a certain parameter, in this case it's going to be the name of that symbol, okay? So I'm going to copy this, going back into, Edge Animate and pasting it in.

And this is typically where people will mess up, because you'll think, okay, I just, you know, paste in the eyes there. And it shouldn't reference a selector. It needs to reference this whole item. It's a symbol, so I need to copy all of that and say, hey, you know what? I accept this symbol called eyes. I'd say that looks good. Let's save this, Preview it in a browser. As I drop it, notice how it goes back. But if I drop it on this monster body, it will stay put. All right, so far, so good, let's do one more thing and then we'll do the same for the mouth, but let's go ahead and make those eyes blink when we drop them on the monster body.

Going back into our code that we were just viewing, which is the actions for the eyes. And, at this point I'm going to add a comma and hit return, and I want to, on drop, fire off a specific function. Open and close curly braces. I want to add within those curly braces, something specific. And in this case, I want to actually play sym.getSymbol and in this case it's going to be the eyes. Now, if this is tricky to remember, remember you don't have to type it all out because you do have, basically, some code snippets down here that you can use.

so I can select Playback, Play, Stage, and targeting the eyes, because I want the eyes to blink. So, look what it just did, it starts to add this, then all I need to do is hit Enter, to apply it and now that's ready to go. Just remove some of these, blank lines. And when you drop it. Onto the monster body, the eyes will blink. Saving that. Running it. Dropping it. Works great. Let's do the same thing for the mouth. Right in here. Copying this whole droppable functionality.

Going into the mouth, clicking on the actions and right underneath it that's where I'm going to paste in this droppable functionality, and just change eyes to mouth, so copy mouth paste, paste done. Saving this, Previewing it and now we have two items as I drop them in. That playthrough and look great.

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