B4J Question Solved - Event move window??

[Ender1969]

Hi all,

How to know if the main application window has been moved in B4j? With MainForm_Resize we know if it changed its size, but what event does it fire if the window was moved?

Thanks

 

[stevel05]

There is nothing built in to B4j, but you can add a listener to the window x and y properties:

#Region Project Attributes
    #MainFormWidth: 600
    #MainFormHeight: 600
#End Region

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private xui As XUI
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    MainForm.Show
  
    Dim Stage As JavaObject = MainForm.As(JavaObject).GetField("stage")
  
    Dim Prop As JavaObject = Stage.RunMethod("xProperty",Null)
    Dim O As Object = Prop.CreateEventFromUI("javafx.beans.value.ChangeListener","WindowMoved",Null)
    Prop.RunMethod("addListener",Array(O))
  
    Dim Prop As JavaObject = Stage.RunMethod("yProperty",Null)
    Dim O As Object = Prop.CreateEventFromUI("javafx.beans.value.ChangeListener","WindowMoved",Null)
    Prop.RunMethod("addListener",Array(O))
  
End Sub


Private Sub WindowMoved_Event (MethodName As String, Args() As Object)
    Log(MainForm.WindowLeft & ", " & MainForm.WindowTop)
End Sub

Edit: link below is a better implementation that I had forgotten about.

 

[Daestrum]

https://www.b4x.com/android/forum/threads/detect-mainform-has-moved.99536/post-626459

 

[Ender1969]

Thanks, solved after following the link.