[ MONKEYX2 ] Android Back button

[AmonParticipant]

What keyboard or mouse keys are the equivalent to the back button on android?

I’m using a galaxy s4 for testing.

[therevillsParticipant]

No idea sorry! Havent actually done any Android development in Monkey2 yet…

I’ll investigate, unless you or anyone else knows!

Edit: Quick Google in pure SDL2 C++:

Monkey

if (event.type == SDL_KEYDOWN) if (event.key.keysym.sym == SDLK_AC_BACK )

1 2	if (event.type == SDL_KEYDOWN) if (event.key.keysym.sym == SDLK_AC_BACK )

[therevillsParticipant]

In the native keyinfo.cpp within Mojo, Mark has:

Monkey

"AC Back",SDL_SCANCODE_AC_BACK,SDLK_AC_BACK,

1	"AC Back",SDL_SCANCODE_AC_BACK,SDLK_AC_BACK,

KeyInfo is used in keyboard.monkey2:

Monkey

Extern Private Struct bbKeyInfo Field name:Void Ptr Field scanCode:Int Field keyCode:Int End Global bbKeyInfos:bbKeyInfo Ptr

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Extern Private   Struct bbKeyInfo Field name:Void Ptr Field scanCode:Int Field keyCode:Int End   Global bbKeyInfos:bbKeyInfo Ptr

…

Monkey

Class KeyboardDevice ... Method Init() Local p:=bbKeyInfos While p->name Local name:=String.FromCString( p->name ) Local scanCode:=p->scanCode Local keyCode:=p->keyCode Local key:=KeyCodeToKey( keyCode ) _names[key]=name _raw2scan[key]=scanCode _scan2raw[scanCode]=key | Key.Raw #If __TARGET__="emscripten" _key2scan[key]=scanCode #Else _key2scan[key]=SDL_GetScancodeFromKey( Cast<SDL_Keycode>( keyCode ) ) #Endif _scan2key[_key2scan[key]]=key p=p+1 Wend End

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Class KeyboardDevice ... Method Init() Local p:=bbKeyInfos While p->name Local name:=String.FromCString( p->name ) Local scanCode:=p->scanCode Local keyCode:=p->keyCode Local key:=KeyCodeToKey( keyCode ) _names[key]=name _raw2scan[key]=scanCode _scan2raw[scanCode]=key | Key.Raw #If __TARGET__="emscripten" _key2scan[key]=scanCode #Else _key2scan[key]=SDL_GetScancodeFromKey( Cast<SDL_Keycode>( keyCode ) ) #Endif _scan2key[_key2scan[key]]=key p=p+1 Wend   End

In SDL_keycode.h

Monkey

enum { ... SDLK_AC_BACK = SDL_SCANCODE_TO_KEYCODE(SDL_SCANCODE_AC_BACK),

1 2 3 4 5 6

enum { ...     SDLK_AC_BACK = SDL_SCANCODE_TO_KEYCODE(SDL_SCANCODE_AC_BACK),

And SDL_keyboard.c

Monkey

static const SDL_Keycode SDL_default_keymap[SDL_NUM_SCANCODES] = { ... SDLK_AC_BACK

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static const SDL_Keycode SDL_default_keymap[SDL_NUM_SCANCODES] = { ... SDLK_AC_BACK

So we may be able to use it somehow…

[therevillsParticipant]

I’ve copied some of the monkey keyboard code and found the scan values for AC_BACK:

Monkey

name = AC Back scanCode = 270 keyCode = 1073742094

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name     = AC Back scanCode = 270 keyCode  = 1073742094

So Amon could you please add this code your project:

Monkey

Method KeyCodeToKey:Key( keyCode:Int ) ' copied from keyboard.monkey2 If (keyCode & $40000000) keyCode=(keyCode & ~$40000000)+$80 ' If keyCode<=0 Or keyCode>=Int( Key.Max ) Return Null ' removed as back key goes beyond Key.Max Return Cast<Key>( keyCode ) End

1 2 3 4 5 6 7

Method KeyCodeToKey:Key( keyCode:Int ) ' copied from keyboard.monkey2 If (keyCode & $40000000) keyCode=(keyCode & ~$40000000)+$80 ' If keyCode<=0 Or keyCode>=Int( Key.Max ) Return Null ' removed as back key goes beyond Key.Max Return Cast<Key>( keyCode ) End

Then when you want to hit the back key:

Monkey

Local backKey:=KeyCodeToKey( 1073742094 ) If Keyboard.KeyHit(backKey) Print "BACK!" End

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Local backKey:=KeyCodeToKey( 1073742094 ) If Keyboard.KeyHit(backKey) Print "BACK!" End

I havent tested this so this may or may NOT work!

[AmonParticipant]

Monkey

Method KeyCodeToKey:Key( keyCode:Int ) ' copied from keyboard.monkey2 If (keyCode & $40000000) keyCode=(keyCode & ~$40000000)+$80 ' If keyCode<=0 Or keyCode>=Int( Key.Max ) Return Null ' removed as back key goes beyond Key.Max Return Cast<Key>( keyCode ) End

1 2 3 4 5

Method KeyCodeToKey:Key( keyCode:Int ) ' copied from keyboard.monkey2 If (keyCode & $40000000) keyCode=(keyCode & ~$40000000)+$80 ' If keyCode<=0 Or keyCode>=Int( Key.Max ) Return Null ' removed as back key goes beyond Key.Max Return Cast<Key>( keyCode ) End

Monkey

Local backKey:=KeyCodeToKey( 1073742094 ) If Keyboard.KeyHit(backKey) App.Terminate() End

1 2 3 4

Local backKey:=KeyCodeToKey( 1073742094 ) If Keyboard.KeyHit(backKey) App.Terminate() End

I added the top one to my GameScreen and the second in the GameScreen Update method. It doesn’t work though. Forgive me if I’m placing the code incorrectly.

Thank you though for helping.

[therevillsParticipant]

Nope you put in the right place…

Damn, KeyHit calls KeyPressed which calls ScanCode… and ScanCode checks Key.Max

I tried an Extension and sub classing the KeyboardDevice class both failed due to it uses a lot of private variables so it complains. I think we need Mark to make a change to get it to work – sorry.

I’ll raise a GitHub ticket and point to this thread. Could you change title of this thread please (edit your first post) as its a Monkey2 issue than a Diddy2 issue

Raised: https://github.com/blitz-research/monkey2/issues/293

[AmonParticipant]

Thanks, therevills. Your help is appreciated a lot. Also, an apology is not needed as you’ve done nothing wrong.

Thread title has been edited as requested.

 

Ta!

[nerobotParticipant]

What about Key.Escape?

[AmonParticipant]

First thing I tried….it doesn’t work though.

[Mark SiblyKeymaster]

Some fixes for this are now up in the develop branch.

It was mostly working already except there was an issue with sdl that meant the app wasn’t initally being given focus properly so key events weren’t getting sent to it. If you hit ‘home’ and refocus app, key events started working. I’ve hacked around this a bit and it should work now.

The other issue is that the back key wasn’t even include in the Key enum. This has been fixed too, so you can now go:

If Keyboard.KeyHit( Key.ACBack) App.Terminate()

(Anyone know what the ‘AC’ in ‘ACBack’ stands for?)

Here’s a little runnable demo which is working fine on my API15 emulator and nvidia shield.

Monkey

Namespace myapp #Import "<std>" #Import "<mojo>" Using std.. Using mojo.. Class MyWindow Extends Window Method New( title:String="Simple mojo app",width:Int=640,height:Int=480,flags:WindowFlags=Null ) Super.New( title,width,height,flags ) End Method OnKeyEvent( event:KeyEvent ) Override If event.Type=EventType.KeyDown Print "KeyDown: "+Keyboard.KeyName( event.Key ) If event.Type=EventType.KeyUp Print "KeyUp: "+Keyboard.KeyName( event.Key ) End Method OnRender( canvas:Canvas ) Override RequestRender() ' If Keyboard.KeyHit( Key.ACBack ) App.Terminate() canvas.DrawText( "Hello World!",Width/2,Height/2,.5,.5 ) End End Function Main() New AppInstance New MyWindow App.Run() End

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

Namespace myapp   #Import "<std>" #Import "<mojo>"   Using std.. Using mojo..   Class MyWindow Extends Window   Method New( title:String="Simple mojo app",width:Int=640,height:Int=480,flags:WindowFlags=Null )   Super.New( title,width,height,flags ) End Method OnKeyEvent( event:KeyEvent ) Override If event.Type=EventType.KeyDown Print "KeyDown: "+Keyboard.KeyName( event.Key ) If event.Type=EventType.KeyUp Print "KeyUp: "+Keyboard.KeyName( event.Key ) End   Method OnRender( canvas:Canvas ) Override RequestRender() ' If Keyboard.KeyHit( Key.ACBack ) App.Terminate() canvas.DrawText( "Hello World!",Width/2,Height/2,.5,.5 ) End End   Function Main()   New AppInstance New MyWindow App.Run() End

[Mark SiblyKeymaster]

…also, I should probably mention that I updated the default android studio project for android products to android studio 3.0.1, so android users should probably do the same. Ditto upgrade all installed tools/sdks/ndks etc to the latest versions.

[therevillsParticipant]

I thought AC stood for Android Code, but it looks like it stands for Application Control.

“AC Back” (the Back key (application control keypad))

https://wiki.libsdl.org/SDL_ScancodeAndKeycode

Thanks for fixing this.

[Mark SiblyKeymaster]

Oops, broke non-android builds a bit…fixed now.

[AmonParticipant]

It’s working now. Thank you again, Mark.

[Author]

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