Support Big Picture APIs.

[hokein]

Fixes #60

After discussing with @patrickklug, currently we have no plan to support steam controller APIs since these APIs are too specific.

This PR exposes the Steam Big Picture APIs:

greenworks.on("gamepad-text-input-dismissed", function(submitted, unsubmittedText) {})

• submitted Boolean: true if user entered & accepted text (call greenworks.getEnteredGamepadTextInput() for text), false if canceled input.
• unsubmittedText: Integer

Emits when Steam Big Picture gamepad text input has been closed.

greenworks.showGamepadTextInput(inputMode, inputLineMode, description, charMax, existingText)

• inputMode: greenworks.GamepadTextInputMode
• inputLineMode: greenworks.GamepadTextInputLineMode
• description: String
• charMax: Integer
• existingText: String

Activates the Big Picture text input dialog which only supports gamepad input

greenworks.getEnteredGamepadTextLength()

Returns previously entered text's length

greenworks.getEnteredGamepadTextInput(cchText)

• cchText: Integer

Returns previously entered text

Enum values:

• greenworks.GamepadTextInputMode.Normal
• greenworks.GamepadTextInputMode.Password
• greenworks.GamepadTextInputLineMode.SingleLine
• greenworks.GamepadTextInputLineMode.MultipleLines

[hokein]

@patrickklug
I haven't test these APIs because I don't have a gamepad device, now I made a prebuilt binary for nw.js 0.8.6 with Steam SDK 1.35 in https://drive.google.com/file/d/0Bx5px5HgHtBxMXdndVpRaXo1NXM/view?usp=sharing
Feel free to test it and report any issue you encounter.

[hokein]

Just for more info.

If anyone who wants to build greenworks for nw.js v0.8.6, he will encounter a call to New is ambiguous compilation error caused by nan v2. The reason is that nw.js v0.8.6 uses a newer v8 version than node v0.10, which nan v2 doesn't support well.

The current workaround is to modify a file in nan. Below shows the way in nan v2.1.0:
Change the line 112 in nan_implementation_pre_12_inl.h to

return v8::FunctionTemplate::New((v8::InvocationCallback)0, data, signature);

[HughIsaacs2]

Have these APIs been merged into the main Greenworks build yet?

[hokein]

@HughIsaacs2 not yet, since I don't have device to test them...

[HughIsaacs2]

I don't think you need a gamepad to use the on screen keyboard in Big Picture mode, and even if so I can definitely say it works with any XInput gamepad (I've used it with my Xbox One controller).

So gamepad or not there should be a way to emulate one (there's a ton of Phone to XInput or even keyboard to XInput apps out there).

[cvan]

hi there, just checking to see the status of this PR. is there anything blocking this from getting merged, any issues that need sorting out first?

[hokein]

@cvan, this PR is kind of outdated, I need to rebase it. Originally this feature was requested by @patrickklug, but he switched to other stuff and didn't get time to play it around.

Do you need this feature? I may pick it up.

[framerate]

Do you need this feature? I may pick it up.

I think anything to improve this library is important, as more and more games coming down the pipe that will want to use it!

[Canvasfull]

Hi @hokein Can I used gamepad now?