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SWT.Show not called for child widgets? [message #533779]

Sun, 16 May 2010 23:49

Misha Koshelev

Messages: 31
Registered: May 2010

Member

Dear All:

Just wondering if for a Text item, for example, there is a good event like SWT.Create that one could use (obviously SWT.Create does not exist).

SWT.Show would be nice, and I use it for shells, but it seems to _never_ be called for Text widgets (or MenuItem widgets for that matter) on GTK 64-bit Linux

Thank you!
Misha

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Re: SWT.Show not called for child widgets? [message #533915 is a reply to message #533779]

Mon, 17 May 2010 13:13

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

Misha Koshelev wrote:
> Dear All:
>
> Just wondering if for a Text item, for example, there is a good event
> like SWT.Create that one could use (obviously SWT.Create does not exist).

What are you trying to do, exactly? I mean, what usecase are you trying
to fulfill?

SWT.Show applies to Menus, not MenuItems or most other widgets.

In 3.6 there is an event that is called during the create lifecycle, but
it is also called during many other points in the lifecycle.

What about SWT.Activate on your text field, or SWT.FocusIn?

PW

--
Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions
http://wiki.eclipse.org/Menus_Extension_Mapping
http://help.eclipse.org/galileo/index.jsp?topic=/org.eclipse .platform.doc.isv/guide/workbench.htm

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: SWT.Show not called for child widgets? [message #533952 is a reply to message #533915]

Mon, 17 May 2010 14:39

Misha Koshelev

Messages: 31
Registered: May 2010

Member

Thank you. I was looking for a convenient listener in which I could set the default value (retrieved from properties) of the Widget.

I have ended up going with SWT.Show on the parent shell.

Please let me know if you have better ideas (I am thinking that the SWT.Activate and FocusIn events do _not_ get called until the user actually activates the control - which would not be the correct time for my purposes - please correct me if I am wrong).

Thank you
Misha

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Re: SWT.Show not called for child widgets? [message #534159 is a reply to message #533952]

Tue, 18 May 2010 09:05

Praveen

Messages: 86
Registered: July 2009

Member

There are couple of ways for achieving this. During the SWT.Show event
of the shell, try to get the children of the shell and set it's default
properties.
Otherwise, you can consider SWT.Resize event for each widget, which
would be triggered when the widget is resized. Note that if the shell is
resized due to which if the widget is resized, then this event is
triggered again. So, you should use flags to check for the occurrence of
the event again.
I couldn't recollect any more better ideas at this moment.

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