Re: [maemo-developers] How to determine if the screen has turned off?
Johan Bilien wrote: http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. Will this callback be called even without processing gtk/glib loop? If not is there other way how to check for blanked display e.g. from SDL app? How SDL games shipped with device do that? Frantisek ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
RE: [maemo-developers] How to determine if the screen has turned off?
http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. Will this callback be called even without processing gtk/glib loop? If not is there other way how to check for blanked display e.g. from SDL app? How SDL games shipped with device do that? Frantisek Hi, Shipped SDL games use wrappers to get some useful callbacks. It is not documented anywhere AFAIK (but sure enough we do have a howto for SDL_net that is about 100% useless for the device). Br, --jakub ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
On Wed, 2006-12-13 at 15:22 -0800, ext Aaron Levinson wrote: On Wed, 13 Dec 2006, Johan Bilien wrote: On Wed, Dec 13, 2006, Aaron Levinson wrote: In the Maemo coding style and programming guidelines document on maemo.org, it states the following: Avoid updating the GUI when the application running on the background and when the screen has been turned off. Remove unnecessary graphical elements or constantly updated screen components. Now, it appears that hildon_window_get_is_topmost() or hildon_program_get_is_topmost() can be used to determine if an application is running in the background, but how does one programmatically determine if the screen has been turned off? I see in the latest version of libosso in SVN that there is a muali API that provides the ability to access the information via a callback, but it is unclear how to determine this on 2.0 or 2.1. Perhaps I can use XScreenSaverQueryInfo() ? http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. Well, I had already examining the libosso APIs before sending the e-mail, and I did notice the system_inactivity_ind flag in the osso_hw_state_t struct. However, according to the libosso documentation, if the callback is called for system inactivity, this means that the application should reduce its activity. I didn't directly associate this text with the screen being blanked, which I think is understandable, since screen blanking is not the same thing. What are the conditions that result in the callback for the system inactivity indicator being called? The statement the application should reduce its activity is somewhat open-ended, and perhaps this callback is used for more than just to indicate that the screen has been blanked. It's not clear to me either, but you can use the system_inactivity_ind for the display on/off information as well (I added that to the trunk libosso.h). I have verified this from the MCE guys some time ago. I'll ask for comments about the new 'muali' API at some point. Now I'm pondering about the API to replace the osso_rpc_* functions. BR; Kimmo Thanks, Aaron ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
ext Frantisek Dufka wrote: Johan Bilien wrote: http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. Will this callback be called even without processing gtk/glib loop? Yes If not is there other way how to check for blanked display e.g. from SDL app? How SDL games shipped with device do that? Nope, but this shouldn't be problem. Just include libosso.h and use the functions. Frantisek ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers // Tapani ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
Hi, http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. Will this callback be called even without processing gtk/glib loop? If not is there other way how to check for blanked display e.g. from SDL app? How SDL games shipped with device do that? I think the app loses focus when the screen is blanked. So, the SDL app could catch screen focus events and do some additional checks when that happens. Can the device state be checked e.g. from some file on the filesystem (it would be better if SDL apps wouldn't need to use/link D-BUS)? Whether app is top one can be checked from a Matchbox maintained (root?) window X property I think. Or SDL app could always pause when it loses focus... - Eero ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
On Thu, 2006-12-14 at 11:16 +0200, ext Eero Tamminen wrote: Hi, http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. Will this callback be called even without processing gtk/glib loop? If not is there other way how to check for blanked display e.g. from SDL app? How SDL games shipped with device do that? I think the app loses focus when the screen is blanked. So, the SDL app could catch screen focus events and do some additional checks when that happens. Can the device state be checked e.g. from some file on the filesystem (it would be better if SDL apps wouldn't need to use/link D-BUS)? AFAIK, it's not possible. MCE has D-Bus interface only. D-Bus is used so much in Maemo that it's quite hard to not use it :P BR; Kimmo Whether app is top one can be checked from a Matchbox maintained (root?) window X property I think. Or SDL app could always pause when it loses focus... - Eero ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
On tor, 2006-12-14 at 11:01 +0200, ext Kimmo Hämäläinen wrote: On Wed, 2006-12-13 at 15:22 -0800, ext Aaron Levinson wrote: On Wed, 13 Dec 2006, Johan Bilien wrote: On Wed, Dec 13, 2006, Aaron Levinson wrote: In the Maemo coding style and programming guidelines document on maemo.org, it states the following: Avoid updating the GUI when the application running on the background and when the screen has been turned off. Remove unnecessary graphical elements or constantly updated screen components. Now, it appears that hildon_window_get_is_topmost() or hildon_program_get_is_topmost() can be used to determine if an application is running in the background, but how does one programmatically determine if the screen has been turned off? I see in the latest version of libosso in SVN that there is a muali API that provides the ability to access the information via a callback, but it is unclear how to determine this on 2.0 or 2.1. Perhaps I can use XScreenSaverQueryInfo() ? http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. Well, I had already examining the libosso APIs before sending the e-mail, and I did notice the system_inactivity_ind flag in the osso_hw_state_t struct. However, according to the libosso documentation, if the callback is called for system inactivity, this means that the application should reduce its activity. I didn't directly associate this text with the screen being blanked, which I think is understandable, since screen blanking is not the same thing. What are the conditions that result in the callback for the system inactivity indicator being called? The statement the application should reduce its activity is somewhat open-ended, and perhaps this callback is used for more than just to indicate that the screen has been blanked. It's not clear to me either, but you can use the system_inactivity_ind for the display on/off information as well (I added that to the trunk libosso.h). I have verified this from the MCE guys some time ago. (MCE guys -- that'd be me, I guess?) Basically, the system_inactivity_ind should not be used for display on/off information, since activity is supposed to be tied to user activity, not screen state; the system can be inactive but still have the display on (however, MCE will not report it as inactive in that case). Sadly some applications relies on the display - activity connection, so MCE reports display on as activity, and it will still remain supported for a few releases to come. However, I want to make it clear that this is not the proper way to do it, and that such an assumption will be incorrect in the long run. I guess the big problem is that there really hasn't been any proper way to do things... The next version of MCE will introduce a new D-Bus signal for this purpose (display_status_ind, and the companion method-call get_display_status), and one or two releases later the old behaviour will no longer be supported. Hopefully these signals will also be taken in use by libosso. [snip] Regards: David ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
Eero Tamminen wrote: I think the app loses focus when the screen is blanked. So, the SDL app could catch screen focus events and do some additional checks when that happens. Good idea, thanks. Or SDL app could always pause when it loses focus... This is good for video updates but sometimes not good for sound or AI code in games. Of course when the device is really inactive (whatever that means exactly) sound and other stuff should be stopped too. Frantisek ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
ext Frantisek Dufka wrote: Eero Tamminen wrote: I think the app loses focus when the screen is blanked. So, the SDL app could catch screen focus events and do some additional checks when that happens. Good idea, thanks. Or SDL app could always pause when it loses focus... This is good for video updates but sometimes not good for sound or AI code in games. Of course when the device is really inactive (whatever that means exactly) sound and other stuff should be stopped too. HW independent idea : a timer that pauses the game when user has not pushed button/screen for x seconds. Not very good for chess or civilization but very good for a gauntlet clone. Frantisek ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers // Tapani ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
[maemo-developers] How to determine if the screen has turned off?
In the Maemo coding style and programming guidelines document on maemo.org, it states the following: Avoid updating the GUI when the application running on the background and when the screen has been turned off. Remove unnecessary graphical elements or constantly updated screen components. Now, it appears that hildon_window_get_is_topmost() or hildon_program_get_is_topmost() can be used to determine if an application is running in the background, but how does one programmatically determine if the screen has been turned off? I see in the latest version of libosso in SVN that there is a muali API that provides the ability to access the information via a callback, but it is unclear how to determine this on 2.0 or 2.1. Perhaps I can use XScreenSaverQueryInfo() ? Thanks, Aaron ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
On Wed, Dec 13, 2006, Aaron Levinson wrote: In the Maemo coding style and programming guidelines document on maemo.org, it states the following: Avoid updating the GUI when the application running on the background and when the screen has been turned off. Remove unnecessary graphical elements or constantly updated screen components. Now, it appears that hildon_window_get_is_topmost() or hildon_program_get_is_topmost() can be used to determine if an application is running in the background, but how does one programmatically determine if the screen has been turned off? I see in the latest version of libosso in SVN that there is a muali API that provides the ability to access the information via a callback, but it is unclear how to determine this on 2.0 or 2.1. Perhaps I can use XScreenSaverQueryInfo() ? http://maemo.org/platform/docs/api/libosso/html/index.html You can register a callback with osso_hw_set_event_cb, set the system_inactivity_ind flag in the osso_hw_state_t argument. -- Johan Bilien [EMAIL PROTECTED] ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
Re: [maemo-developers] How to determine if the screen has turned off?
Aaron Levinson wrote: Well, I had already examining the libosso APIs before sending the e-mail, and I did notice the system_inactivity_ind flag in the osso_hw_state_t struct. However, according to the libosso documentation, if the callback is called for system inactivity, this means that the application should reduce its activity. I didn't directly associate this text with the screen being blanked, which I think is understandable, since screen blanking is not the same thing. What are the conditions that result in the callback for the system inactivity indicator being called? The statement the application should reduce its activity is somewhat open-ended, and perhaps this callback is used for more than just to indicate that the screen has been blanked. Right, screen blanking is the only occasion where I have seen this callback triggered, but maybe it's used in other cases, Kimmo? -- Johan ___ maemo-developers mailing list maemo-developers@maemo.org https://maemo.org/mailman/listinfo/maemo-developers
