BBC BASIC - Set orientation

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Set orientation

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roy
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Set orientation
« Thread started on: Mar 22^nd, 2018, 03:44am »

Hi All

I wanted to try some sys calls so thought I'd try and set the orientation to Portrait.

Looked at this sit, and then came up with the listing below. Tried it a few different ways but can't get it to work.

Any ideas

Regards Roy

Code:

   10 on error if err=17 chain @lib$+"../examples/tools/touchide" else procCleanup : mode 3 : print report$; " At line " erl : wait 1000  : end   20   30 mode 6      rem Set orientatton   40 rem Values   50 rem LandscapeLeft      = top of device left   60 rem LandscapeRight     = top of device right   70 rem Portrait           = top of device up   80 rem PortraitUpsideDown = top of device down   90  100 LandscapeLeft = 0  110 LandscapeRight = 1  120 Portrait = 2  130 PortraitUpsideDown = 3  140  150 sys "SDL_SetHint","SDL_HINT_ORIENTATIONS,Portrait"  170 printtab(10,10)"Portrait"  180 repeat wait 4 : until false

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Richard Russell
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Re: Set orientation
« Reply #1 on: Mar 22^nd, 2018, 11:16am »

on Mar 22^nd, 2018, 03:44am, roy wrote:

I wanted to try some sys calls so thought I'd try and set the orientation to Portrait.

I'm not entirely clear what you are trying to achieve. If you want to lock the orientation so that device rotations have no effect (or to force it to portrait so that rotations are limited to +/- 180 degrees) that's something that must be set in the app's manifest, not in a BASIC program.

The Help instructions for BBC2APK explain how to create an APK with a custom manifest to force the orientation to portrait or landscape, but still under control of the accelerometer. You can also disable the automatic rotations altogether so that rotating the device by 180 degrees results in an upside-down display!

But that's got nothing to do with SYS or BASIC programming in general (SDL_HINT_ORIENTATIONS is explicitly documented as being for iOS, not Android).

Richard.

« Last Edit: Mar 22^nd, 2018, 12:57pm by Richard Russell »

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roy
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Re: Set orientation
« Reply #2 on: Mar 22^nd, 2018, 7:45pm »

Hi Richard

Thanks for the explanation.

Regards Roy

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