B4J Question Keep forms on top and swap focus

[atiaust]

Hi All,

I have a main form which is loaded and occupies the whole screen.
I load another form loaded from a code module which opens on top of the main form on the right half of the screen and needs to stay on top so I use form.showandwait in the 2nd module.

My problem is I need to move focus back to the main form to scroll thru a table view but keep the 2nd form open and on top then move focus back to the second form.

If I just use form.show the 2nd form disappears behind the main form but I need keep it on top.

Its not a problem if both forms are in the same code module but I have multiple popup forms that need to switch focus between itself and the main form.

Hope this is clear as mud.....

Any ideas?

 

[Erel]

It doesn't matter where the forms are implemented.

Sounds to me that it will be better to use:

Form2.SetOwner(Main.MainForm)
Form2.Show

 

[atiaust]

Thanks Erel,

This woks as long as you set "Private Mainform as Form" to Public

If you close the second form and try to open it again I get an error:

Error occurred on line: 21 (RightForm)
java.lang.IllegalStateException: Cannot set owner once stage has been set visible
at javafx.stage.Stage.initOwner(Stage.java:561)
at anywheresoftware.b4j.objects.Form.SetOwner(Form.java:222)
at b4j.example.rightform._show(rightform.java:63)
at b4j.example.main._btnright_mouseclicked(main.java:118)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

Any ideas ?

 

[Daestrum]

This may help

...
AlwaysOnTop(MainForm,True) ' this could be any form
End Sub

private Sub getStage(o As JavaObject) As JavaObject
Return o.GetFieldJO("stage")
End Sub
Sub AlwaysOnTop(o As Form,boo As Boolean)
getStage(o).RunMethod("setAlwaysOnTop",Array(boo))
End Sub

 

[Erel]

You need to set the owner once after the form is created.

 

[atiaust]

Thanks Erel.
When you close the second form using "form.close" does it not actually remove the form?

 

[Erel]

It does remove it but you can still show it again by calling Form.Show.

Just set the owner after you initialize the form and everything will work fine.

 

[atiaust]

Ok thanks..

 

[atiaust]

My apologies to Daestrum,

I meant to thank you for your reply. I did try your suggestion but by the time I got back to the issue Erel had replied as well.

Thanks