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Detecting system idle time [message #443981]

Tue, 05 October 2004 10:36

Grant Slender

Messages: 14
Registered: July 2009

Junior Member

G'day - was wondering what steps I'd need to take to detect when the
underlying OS is idle.

I'm kinda hoping that SWT might sorta support this kind of event detection -
if not, I suppose I'm gonna have to write a OS specific hook to detect when
mouse/keyboard events stop and then start a counter for a grace period and
then after, say 30 seconds, assume the system is indeed idle.

The trick is to ensure that the system is indeed idle and not that my app is
switched away and the user is really using another app.

Any tips really appreciated.

Grant

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Re: Detecting system idle time [message #443989 is a reply to message #443981]

Tue, 05 October 2004 13:43

Tiberiu Caprita

Messages: 68
Registered: July 2009

Member

A way to find when a app is idle:
Swt "get" in Idle, when is doing display.sleep().
Practically, every application has a loop as
while(!shell.isDisposed()) {
if(!display.readAndDispatch())
display.sleep();
}

Doing display.sleep(), the thread gives possibility to other applictaion
to use CPU.

Tiberiu

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Re: Detecting system idle time [message #444039 is a reply to message #443989]

Tue, 05 October 2004 14:02

Tiberiu Caprita

Messages: 68
Registered: July 2009

Member

Sorry,
I didn't get from first time your request.
It seems indeed for a Task Shceduler you have no other choice than to
listen mouse/keyboard.

Tiberiu

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Change the background colour ofa check box? [message #444298 is a reply to message #443981]

Mon, 11 October 2004 15:56

Anthony Bennis

Messages: 17
Registered: July 2009

Junior Member

Hi,

I'm attempting to achieve the "half selected" effect by changing the
colour of a check buttons background in SWT.

"setBackground(Color color)" only changes the parent composite's colour
of the text component.

Any help appreciated,
Anthony Bennis.

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