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Giving JDialog the correc

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  Giving JDialog the correc "Lionel van den Berg" <lionel.van.den.berg@THRWHITE.remove-dii-this> - 2011-04-27 15:32 +0000
    Re: Giving JDialog the co "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:32 +0000
    Re: Giving JDialog the co "Dan Andrews" <dan.andrews@THRWHITE.remove-dii-this> - 2011-04-27 15:32 +0000
      Re: Giving JDialog the co "Lionel van den Berg" <lionel.van.den.berg@THRWHITE.remove-dii-this> - 2011-04-27 15:32 +0000

#1356 — Giving JDialog the correc

  To: comp.lang.java.gui
Often I find an error or want to give the user some information I am 
doing so in a class that is an extension of JPanel. However, this JPanel 
may have another JPanel as it's parent, or some other Container class. 
So if I have to show a modal JDialog or JOptionPane I don't know what to 
provide as the parent.

Providing null to a JDialog means that if I click on another window and 
then back onto the original, the dialog dis-appears behind the main window.

Does anyone have a design solution to this? I sort of thought that I 
might have a class that tracks the active window, but then all windows 
would have to register and de-register with this class . . . doesn't 
seem very convenient.

Any help appreciated.

Lionel.

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#1357 — Re: Giving JDialog the co

  To: comp.lang.java.gui
Lionel van den Berg wrote:
>Often I find an error or want to give the user some information I am 
>doing so in a class that is an extension of JPanel. However, this JPanel 
>may have another JPanel as it's parent, or some other Container class. 
.
>Providing null to a JDialog means that if I click on another window and 
>then back onto the original, the dialog dis-appears behind the main window.
>
>Does anyone have a design solution to this? 

I am still not sure what the question is, but note that
if you can find your way back to the 'root' JFrame/JWindow 
etc., you can use that as the owner of the JDialog.

Methods that might help with this are possibly..*
JComponent.getRootPane(), or a loop that
asks for the Component.getParent() until getParent()
returns 'null' (that Component will be the JFrame
or JWindow).

* ..and I am sure there is a method that actually 
returns the JFrame/JWindow directly, but I cannot 
recall what it is, at this moment.

-- 
Andrew Thompson
http://www.athompson.info/andrew/

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#1361 — Re: Giving JDialog the co

  To: comp.lang.java.gui
On Apr 1, 3:09 am, Lionel van den Berg <lione...@gmail.com> wrote:
[snip]
> Does anyone have a design solution to this? I sort of thought that I
> might have a class that tracks the active window, but then all windows
> would have to register and de-register with this class . . . doesn't
> seem very convenient.
>
> Any help appreciated.
>
> Lionel.

Hi Lionel,

In addition to Andrew's solution, Frame has a method named getFrames
which will return a list of all Frames and if you only have one JFrame
you could use:

JFrame myFrame = (JFrame)Frame.getFrames()[0];

In JDK 1.6 you can use Window.getWindows() too.

Otherwise, you will need to determine which of the Frames isActive()
or use some other method to determine if the frame is the frame you
want.

Cheers,
Dan Andrews
-------------------
http://www.ansir.ca

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#1366 — Re: Giving JDialog the co

  To: comp.lang.java.gui
Dan Andrews wrote:
> On Apr 1, 3:09 am, Lionel van den Berg <lione...@gmail.com> wrote:
> [snip]
>> Does anyone have a design solution to this? I sort of thought that I
>> might have a class that tracks the active window, but then all windows
>> would have to register and de-register with this class . . . doesn't
>> seem very convenient.
>>
>> Any help appreciated.
>>
>> Lionel.
> 
> Hi Lionel,
> 
> In addition to Andrew's solution, Frame has a method named getFrames
> which will return a list of all Frames and if you only have one JFrame
> you could use:
> 
> JFrame myFrame = (JFrame)Frame.getFrames()[0];
> 
> In JDK 1.6 you can use Window.getWindows() too.

Not using 1.6 yet :(. Decided to support 1.5 as it's still not too old.


> Otherwise, you will need to determine which of the Frames isActive()
> or use some other method to determine if the frame is the frame you
> want.

Excellent. I do Frame.getFrames(); and then iterate through them calling 
isActive() to get the active frame. It now works perfectly.

Thanks to both responses. :).

Lionel.

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