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Setting focus to another part programmatically [message #1718292]

Tue, 22 December 2015 07:55

Mihael Schmidt

Messages: 81
Registered: August 2010

Member

I am trying to move the focus from one part to another part. I tried:

partService.activate(part, true);

My part has the following code:

@Focus
public void onFocus() {
getViewer().getControl().setFocus();
}

But this is never called. What am I doing wrong?

Thanx in advance

Mihael

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Re: Setting focus to another part programmatically [message #1718350 is a reply to message #1718292]

Tue, 22 December 2015 18:08

Brian de Alwis

Messages: 876
Registered: January 2012

Senior Member

Try enabling the DI tracing options (launch configuration dialog > Tracing > org.eclipse.e4.core.di for debug/injector) and see if there's an issue when invoking the method.

Otherwise please post an example demonstrating the problem. You're simply not providing sufficient context to narrow down the problem.

Brian.

Eclipse Platform committer. Ask me about Eclipse support, training, and consulting.

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Re: Setting focus to another part programmatically [message #1718389 is a reply to message #1718350]

Wed, 23 December 2015 09:14

Mihael Schmidt

Messages: 81
Registered: August 2010

Member

Sorry for not being able to give enough info. I am a bit under pressure for making a release.

I have done some more testing and can confirm that it does not happen on all platforms. On windows (win 7 64bit) it works. On linux (debian 7 64 bit openbox) it works partially.

If I am using a double click action from one part to focus another part it doesn't work on my linux desktop. If I use a popup menu entry from one part to activate and focus another part it also works on linux.

I can also confirm that the method which is annotated with @Focus is called every time.

I hope it helps.

Mihael

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Re: Setting focus to another part programmatically [message #1718393 is a reply to message #1718389]

Wed, 23 December 2015 10:06

Thomas Schindl

Messages: 6566
Registered: July 2009

Senior Member

have you tried simply delaying the focus transferal by scheduling a
asyncExec? I think the problem on Linux is that everything involved is
inheritly async and eg mouse-events are delivered not in the same
dispatch (although already scheduled on the event-queue), an asyncExec
would make sure that all the focus transfer is after all other events.

Tom

On 23.12.15 10:14, Mihael Schmidt wrote:
> Sorry for not being able to give enough info. I am a bit under pressure
> for making a release.
>
> I have done some more testing and can confirm that it does not happen on
> all platforms. On windows (win 7 64bit) it works. On linux (debian 7 64
> bit openbox) it works partially.
>
> If I am using a double click action from one part to focus another part
> it doesn't work on my linux desktop. If I use a popup menu entry from
> one part to activate and focus another part it also works on linux.
>
> I can also confirm that the method which is annotated with @Focus is
> called every time.
>
> I hope it helps.
>
> Mihael

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Re: Setting focus to another part programmatically [message #1718396 is a reply to message #1718393]

Wed, 23 December 2015 11:05

Mihael Schmidt

Messages: 81
Registered: August 2010

Member

Thomas Schindl wrote on Wed, 23 December 2015 11:06

have you tried simply delaying the focus transferal by scheduling a
asyncExec? I think the problem on Linux is that everything involved is
inheritly async and eg mouse-events are delivered not in the same
dispatch (although already scheduled on the event-queue), an asyncExec
would make sure that all the focus transfer is after all other events.

Wow. I am impressed by your deep knowledge. You hit the nail on the head. Wrapping it up into an asyncExec worked.

Thanx very much.

Mihael

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