RT @MattThorson: TowerFall news 3/3: TowerFall Ascension and Dark World are coming to XBox One! No release date yet, but I'm playing it and… (Today)

RT @MattThorson: TowerFall news 2/3: I finally released the official 8-player TowerFall mod! It's insane t.co/NhCCXhBSlO (Today)

RT @MattThorson: TowerFall news 1/3: A great recap video from 3rd TowerFall World Championship at @IndieOlympics :D (by @MllePilgrim) https… (Today)

@theBanov @djcoreynolan @Travel_Pillow ohhhh that is the sweetest thing <3 (Yesterday)

@TeddyDief 4x cut?? (2 days ago)

@biphenyl I'll have to work on my leading with the lightning gun but I think its doable (2 days ago)

@biphenyl let me know when it has internet (2 days ago)

@jswiatek Sure, can work out the details via email: hi@kpulv.com (3 days ago)

@staticsteven ah it might be sampling from outside the bounds. Maybe somehow clamp it's source pixel to the bounds of the texture. (3 days ago)

@staticsteven I add the displacement at explosions and they scale up and fade out over time (3 days ago)

@floatvoid LEVEL 60 ZEBRA ROBOMANCER (4 days ago)

RT @cmuratori: I propose a different name for "Software as a service" that is more accurate: "Software as a tax." (4 days ago)

RT @TomFulp: Gone In A Flash - Kickstarter for a documentary about the Flash boom that changed the internet. Check it out! t.co/rKx… (4 days ago)

@TimothyFitz you just can't win. just get one of those 800lb widescreen CRT monitors~ (5 days ago)

@ADAMATOMIC @TommyRefenes @neilcic hahhaha this is what 11 year old kyle thought was going to happen when they said fire at will (5 days ago)

@konjak yay slot machines (5 days ago)

@TyrusPeace twitter is a fickle beast (6 days ago)

@ADAMATOMIC top 10 blow ups of 2016 (7 days ago)

@nnnehpe haha yeah maybe (7 days ago)

I hope the 3 people in the world that actually get the secret ending in sky sisters appreciate all the art I'm doing for it (8 days ago)

follow
search

2013 - 5 - 22 / 12:57 pm / tutorials

Disable ESC in Fullscreen on Adobe AIR

Disable ESC in Fullscreen on Adobe AIR

One of the issues with building a desktop application with Adobe AIR is that there is a built in function in the runtime that will cancel any full screen mode when the user pushes the Escape key. This is mostly a functionality of Flash, but it carries over to AIR since AIR is pretty much an extension of the Flash runtime.

Fortunately when you're using the AIR runtime you can actually override the default functionality of the Escape key and keep your application full screen when the user pushes Escape. This came up in Offspring Fling because I was using the Escape key in my UI design. The user pushes Escape to return to the main menu, pause the game, or skip cutscenes, so it was a problem when escape also canceled the game's full screen mode.

The fix for this is super easy and straight forward. First you just need an event listener on the stage for the KEY_DOWN KeyboardEvent.

//listen for key down event and trigger escOverride function
FP.stage.addEventListener(KeyboardEvent.KEY_DOWN, escOverride);

Now here's what the escOverride function looks like.

private function escOverride(e:KeyboardEvent):void {
if (e.keyCode == 27) {
e.preventDefault();
}
}


The keyCode for the Escape key is 27, so whenever a key is pressed the function escOverride is called. If the keyCode was 27, then the preventDefault() function will prevent the default action from being triggered. In this case, it's the "exit fullscreen" action.

There you have it! With just 4 or 5 lines of code total you can prevent your Adobe AIR game from canceling fullscreen when the user pushes Escape. With great power comes great responsibility. (Also note that I believe this is impossible in a normal swf build. The preventDefault() function only works in Adobe AIR.)

8 Comments
Avatar

2013 - 5 - 25 3:54 AM

Fedyfausto

thx a lot Kyle :D i'm waiting your tutorial for bitmapfont

Avatar

2013 - 7 - 10 12:29 PM

Kristian Welsh

Very useful little tidbit there, thank you!

Avatar

2013 - 10 - 20 8:45 AM

Chris

Thanks for the info. Exactly what I needed.

A tiny improvement of the code:
It's a tad better to write:

private function escOverride(e:KeyboardEvent):void {
if (e.keyCode == Keyboard.ESCAPE) {
e.preventDefault();
}
}

... there is a constant to use for this kind of comparison... it should be used.

Avatar

2013 - 10 - 21 3:01 AM

Kyle

Oh nice! I must've missed the keyboard constants at the time I was using this code ;)

Avatar

2014 - 5 - 5 10:53 PM

VB

It doesn't work in Flex MenuBar,
with open submenus!

Avatar

2015 - 1 - 18 4:07 AM

VB

It doesn't work in Flex MenuBar,
with open submenus!

Make menuBar.hight = 0 as it is in real Fullscreen mode and don't bother more about Esc! Then restore later if need.

Avatar

2015 - 7 - 6 12:07 PM

Daniel Benmergui

Well this is useful... thanks from the future, Kyle!

Avatar

2015 - 7 - 6 8:07 PM

Kyle

Haha awesome! I don't know if this still works, it's been many many many years since I've used AIR x_x

Avatar

Post your comment!

POST COMMENT

about

About

Hi! My name's Kyle, and I make video games most of the time in Denver, Colorado. Here you will find my thoughts, games, websites, doodles, and other stuff like that. I worked on Snapshot, Offspring Fling, and a whole bunch of other games. I also created and maintain Otter, a 2d game making framework. If you want to get a hold of me use the form on the bottom of the page, leave a comment, or just tweet at me. I try to post three times a week. Thanks for stoppin' by! You're the coolest.

blog stuff

categories

tags

archives

facebook

videos

Do you want to make a Let's Play of one of my games, or a just a video featuring footage of my games? You have my full permission to do so! Even if you are monetizing your videos, you still have my full permission to use any footage from any of my games. Go for it!

contact

Your message has been sent! Thanks :)
SEND MESSAGE