nanogui: Thread: Full screen refresh in nanox

Hi All,
I am developing a nanox application which is very similar 
launcher demo. This particular application is capable of 
playing a video on the screen, but once the video is finished,
when it comes to display the programs main window, most of the screen
area contains garbage (Except the button which are getting repainted).

Is there a way to re-display every window? I need to refresh the window
background, top window and child windows.

Thanks 
Durai

You can force everything to be redrawn, but I have a different
idea/question.
If you play your video in a new window and then close that window at the
end, nanox will repaint everything (under the window) automatically,
right?.
You do not want to write to screen (play video) without letting nanox
know about it.
This is when you get in trouble.

Martin


-----Original Message-----
From: Durai ####@####.####
Sent: Thursday, March 23, 2006 9:21 AM
To: ####@####.####
Subject: [nanogui] Full screen refresh in nanox


Hi All,
I am developing a nanox application which is very similar 
launcher demo. This particular application is capable of 
playing a video on the screen, but once the video is finished,
when it comes to display the programs main window, most of the screen
area contains garbage (Except the button which are getting repainted).

Is there a way to re-display every window? I need to refresh the window
background, top window and child windows.

Thanks 
Durai


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On Thu, 2006-03-23 at 10:14 -0800, Martin Kajdas wrote:
> You can force everything to be redrawn, but I have a different
> idea/question.
> If you play your video in a new window and then close that window at the
> end, nanox will repaint everything (under the window) automatically,
> right?.

Actually, playing video is not inside a window. I have two graphics
plane, one is meant for RGB window which is used for framebuffer, and
another plane is used for video. (A shell command is invoked to play the
video)

>You do not want to write to screen (play video) without letting nanox
> know about it.

You are correct. But playing a video on the other plane leaves the RGB
window corrupted. Here in this case I have to redraw the screen as it
was before. 

Please let me know how to forcefully redraw everything.

Regards
Durai

Redrawing depends on your application.
I use FLTK and there I just call redraw() functions for each window.
If your screen does not change during video, you can save the
framebuffer and restore it at the end.
This is what double buffering does in FLTK.
Martin


-----Original Message-----
From: Durai ####@####.####
Sent: Thursday, March 23, 2006 10:37 AM
To: Martin Kajdas
Cc: ####@####.####
Subject: RE: [nanogui] Full screen refresh in nanox


On Thu, 2006-03-23 at 10:14 -0800, Martin Kajdas wrote:
> You can force everything to be redrawn, but I have a different
> idea/question.
> If you play your video in a new window and then close that window at
the
> end, nanox will repaint everything (under the window) automatically,
> right?.

Actually, playing video is not inside a window. I have two graphics
plane, one is meant for RGB window which is used for framebuffer, and
another plane is used for video. (A shell command is invoked to play the
video)

>You do not want to write to screen (play video) without letting nanox
> know about it.

You are correct. But playing a video on the other plane leaves the RGB
window corrupted. Here in this case I have to redraw the screen as it
was before. 

Please let me know how to forcefully redraw everything.

Regards
Durai

On Thu, 2006-03-23 at 10:45 -0800, Martin Kajdas wrote:
> Redrawing depends on your application.
> I use FLTK and there I just call redraw() functions for each window.
> If your screen does not change during video, you can save the
> framebuffer and restore it at the end.
> This is what double buffering does in FLTK.
> Martin
> 

Thanks. I solved the problem by calling GsRedrawScreen(). But this
cannot be called from user application normally, I need to do a little 
hack to do this. I am not using FLTK,anyway thanks for your time 

Regards
Durai

 
Hi,

another way that can be used from any client is to just open a window as large as the screen (or simply 0, 0, 5000, 5000 :-) and close it again immediately. This will make nano-X redraw everything that was covered by the dummy-window. The window itself cannot be seen because you open and close it without delay.

Thomas

----- Original Nachricht ----
Von:     Durai ####@####.####
An:      Martin Kajdas ####@####.####
Datum:   23.03.2006 20:03
Betreff: RE: [nanogui] Full screen refresh in nanox

> On Thu, 2006-03-23 at 10:45 -0800, Martin Kajdas wrote:
> > Redrawing depends on your application.
> > I use FLTK and there I just call redraw() functions for each window.
> > If your screen does not change during video, you can save the
> > framebuffer and restore it at the end.
> > This is what double buffering does in FLTK.
> > Martin
> > 
> 
> Thanks. I solved the problem by calling GsRedrawScreen(). But this
> cannot be called from user application normally, I need to do a little 
> hack to do this. I am not using FLTK,anyway thanks for your time 
> 
> Regards
> Durai
> 
> 
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> For additional commands, e-mail: ####@####.####
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>