B4J Question ScrollBar Horizzontal ...

[ivanomonti]

How can I retrieve the value of a horizontal scrollBar..

#Region  Project Attributes
   #MainFormWidth: 600
   #MainFormHeight: 400
#End Region

Sub Process_Globals
   Private fx As JFX
   Private MainForm As Form
   Dim IMscrollbar As ScrollPane
   Dim IMProgressBar As ProgressBar
   Dim IMtextField As TextField
   
End Sub

Sub AppStart (Form1 As Form, Args() As String)
   MainForm = Form1
   MainForm.RootPane.LoadLayout("Layout1") 'Load the layout file.
   MainForm.Show
   
   IMscrollbar.Initialize("IMscrollbar")
   IMtextField.Initialize("IMtextField")
   
End Sub

Sub IMscrollbar_HScrollChanged(Position As Double)
   IMtextField.Text = "Posizione scrollbar: " & Position
End Sub

Sub IMscrollbar_VScrollChanged(Position As Double)
   IMtextField.Text = "Posizione scrollbar: " & Position
End Sub

where I'm wrong, because I do not shoot the event IMscrollbar_HScrollChanged or IMscrollbar_VScrollChanged

 

[Erel]

You shouldn't initialize nodes that were added in the layout file.

 

[ivanomonti]

ok Erel but does not solve the problem of how to get or set a value to the scrollpane or better if it would be a scrollBar!!

 

[Erel]

See the documentation: http://www.b4x.com/b4j/help/jfx.html#scrollpane

You can use HPosition or VPosition to get or set the position.

 

[ivanomonti]

erel forgive me, but to get the current value of a H scrollBar what should I do, I can not find any reference to it

you can have a quick example

TextField.text = ScrollBar.value

 

[Erel]

TextField.Text = ScrollBar.HPosition

This will return a value between 0 to 1. You can multiply it with the width of the inner pane to get the offset in pixels.