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[CaptainChaos]

I really tried everything, but i cant capture hidden/minimized windows with PrintWindow. Could you please tell me how you do it?

[amos]

Welcome to the board, CaptainChaos!

I've flagged this question for Koji, the developer, to look at, so hopefully you'll get some help soon

- Amos

[Roman]

Hi,

Amos, let's move this post to here.

CaptainChaos, for now, feel free to go to MSDN and maybe ask your question there as well.

[CaptainChaos]

Thanks for reply, but the "trick" with WM_PRINT and PrintWindow i already know.
What i dont know is how to capture the minimized windows. If a window is minimized and i capture it with PrintWindow i only get the window caption. i hoped you guys could tell me what calls i have to do.
do i have to set up a hook to intercept minimize events or something like that?

[koji]

Hi CaptainChaos

Welcome to WinFlip Messageboard.

What i dont know is how to capture the minimized windows. If a window is minimized and i capture it with PrintWindow i only get the window caption. i hoped you guys could tell me what calls i have to do.
do i have to set up a hook to intercept minimize events or something like that?

It's not so big problem.
What you have to do is,

ShowWindow(hWndTarget, SW_RESTORE);

Then capture window as you mentioned,

ShowWindow(hWndTarget, SW_MINIMIZE);

That's it.

But the window resize animation obstructs the quick action.
Therefore, you should disable it.

ANIMATIONINFO AnimationDisable={sizeof(ANIMATIONINFO), 0};
SystemParametersInfo(SPI_SETANIMATION, sizeof(ANIMATIONINFO), &AnimationDisable, 0);

and enable it after capturing a window.

ANIMATIONINFO AnimationEnable={sizeof(ANIMATIONINFO), 1};
SystemParametersInfo(SPI_SETANIMATION, sizeof(ANIMATIONINFO), &AnimationEnable, 0);

You have to check the resize animation is enabled or disabled before proceed the code above. Somecases the resize animation is already disabled. At that case you should not change the setting.
use SPI_GETANIMATION to check it.

Good luck.
Koji

[Roman]

The window caption is all you can get of a minimized window. If you want a min. win. image, save its image to memory when the window is still max. Then retrieve it from the memory.

[CaptainChaos]

wow! thanks koji!!

[koji]

Hi Roman

The window caption is all you can get of a minimized window. If you want a min. win. image, save its image to memory when the window is still max. Then retrieve it from the memory.

Yeah, It's one of way to solve this problem.
Just I replied my way. There are more than one way to do it.

Cheers,
Koji

@amos
Thank you for your quick follow-up comment.

[CaptainChaos]

hmmm... i tried it but it doesn't seem to be as fast as yours...

//before enumeration
manager->ensureAnimationDisabled();

//in enumeration
bool minimize = manager->showWindow(hwnd);
PrintWindow(hwnd, hdcMem, 0);
if(minimize)
   manager->minimizeWindow(hwnd);

//after enumeration
manager->ensureAnimationEnabled();

i shortly see every minimized window flicker...
is there any other trick?

PS: If you're interested for what i need it, you know beryl, i want to do the desktop-cube with window-drag support.

[koji]

Hi Captain

hmmm... i tried it but it doesn't seem to be as fast as yours...

Could you check which part is slow please?
I just wanna make sure what is the problem.

and only if you may, Send me the source code via the email. I'll check it for you. (but may be not today. I'm bit busy at moment)

i want to do the desktop-cube with window-drag support.

You mean beryl + window drag support?

Cheers,
Koji

[CaptainChaos]

ok. the part which is slow is the capturing part itself.
i made a small example. its fliping like yours
the other code is too complicated.

i now set the window which shall be captured full transparent before showing and hiding, so any flickering can be seen.

Cheers CC

[koji]

Hi Captain

How's it going?

I downloaded and checked your source code.
The attached is missing some of files to compile it.
So, just I read the main source code "screenflip.cpp" only.

I think "void ScreenFlip::initProcList()" is not bad.
How many seconds does it require to capture 10 of minimized windows?(@XGA env)
WinFlip v.0.50 takes almost one second at my note PC env.(Core2 Duo U7500 @1.06GHz, 2GB RAM, Mobile Intel(R) 965 Express Chipset Family)
Therefore, If your logic takes more than one second, I can say It's slow. but I can't compile your source code. so, I don't know how to evaluate yours.
If you want me check it, send me the source code again with missing files.

note:
WinFlip takes all open windows screenshot at startup. but doesn't take screenshot at the beginning of flip action. Therefore If you are thinking about the beginning of flip action, the problem is not that logic.

Cheers,
Koji