B4J Question How to make a window "top most" (Solved-JFX8)

[jmon]

Hello,

I would like to have a window always on top of all the other desktop windows. "System top most". Is it possible with B4J? I have the feeling that it's the stage/toFront() from this page, but I don't know how to implement it in B4J.

Thanks.

[edit] : See the solution on post #10

 

[Erel]

If you set the form's owner then the form will be on top of its parent.

Stage.toFront will not help. It will just bring it to the front. An always on top option will be added in JavaFX 8 (together with Java 8).

 

[jmon]

ok, so if I understand correctly, for the moment it's not possible to have the owner in background and the child above all other desktop windows?

Argh.. I will have to wait for a few months!

Thanks

 

[Erel]

The child can be on top of all other windows. However it will not stay there. Once you press on a different window it will move to the background.

 

[Gary Miyakawa]

Is there any way for a form to be on top of ALL other windows ? (like, on Visual Basic, form.topmost)

I found a piece of code but don't know how to implement it on B4J...

stage.initModality(Modality.APPLICATION_MODAL);

Any help would be appreciated !

Gary M

 

[Erel]

This line exactly is called when you call Form.ShowAndWait.

 

[Gary Miyakawa]

This line exactly is called when you call Form.ShowAndWait.

Perfect !

Thank you !

 

[jmon]

That's it, I just found that the new version of JavaFX 8u20 has the possibility to set the window on top:
http://java.dzone.com/articles/javafx-8u20-days-future-past . I've tested it and it works very well.

 

[Swissmade]

Hi all,
Maybe a sample of this how it is done.
Many thanks for help.

 

[jmon]

Hi all,
Maybe a sample of this how it is done.
Many thanks for help.

Here:

setAlwaysOnTop(Form, True)

Sub setAlwaysOnTop(frm As Object, Value As Boolean)
    Dim frmJO As JavaObject = frm
    Dim stage As JavaObject = frmJO.GetField("stage")
    stage.RunMethod("setAlwaysOnTop", Array(Value))
End Sub

 

[Swissmade]

Here:

setAlwaysOnTop(Form, True)

Sub setAlwaysOnTop(frm As Object, Value As Boolean)
    Dim frmJO As JavaObject = frm
    Dim stage As JavaObject = frmJO.GetField("stage")
    stage.RunMethod("setAlwaysOnTop", Array(Value))
End Sub

Nice working.
Many thanks for this you are a live saver

 

[JTmartins]

Works Perfectly, however it interferes with jMsgBoxes, as they apear underneath.

The trick is to do this everytime there is a msgbox to apear

setAlwaysOnTop(MainForm, False)
Msgbox.Show("blah blah blah", "testing")
setAlwaysOnTop(MainForm, True)

So before we call the msgbox we disable the always on top, show the msgbox and after that we enable again the always on top.

 

[ivanomonti]

Error function!!! I need to have a window always on top, I used the following code, but by mistake

setAlwaysOnTop(FormEdit, True)

Sub setAlwaysOnTop(frm As Object, Value As Boolean)
    Dim frmJO As JavaObject = frm
    Dim stage As JavaObject = frmJO.GetField("stage")
    stage.RunMethod("setAlwaysOnTop", Array(Value))
End Sub

Program started.
Error occurred on line: 124 (cssmodule).
java.lang.RuntimeException: Method: setAlwaysOnTop not found in: javafx.stage.Stage
    at anywheresoftware.b4j.object.JavaObject$MethodCache.getMethod(JavaObject.java:367)
    at anywheresoftware.b4j.object.JavaObject.RunMethod(JavaObject.java:118)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:606)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:227)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:156)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:82)
    at anywheresoftware.b4a.BA$2.run(BA.java:165)
    at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179)
    at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:176)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:176)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:17)
    at com.sun.glass.ui.win.WinApplication$3$1.run(WinApplication.java:67)
    at java.lang.Thread.run(Thread.java:744)

 

[jmon]

There are two possibilities:
Either you don't compile using Java 8 u_20 minimum, or "FormEdit" isn't a form.

 

[ivanomonti]

an instance of a class that I created a new form

 

[jmon]

How about in B4J, did you set the path of the javac.exe to "C:\Program Files (x86)\Java\jdk1.8.0_45\bin\javac.exe" ?