B4J Tutorial OdoMeter with JavaObject

It is based on the Github project posted here.....

I will elaborate on this a bit later in the same thread - was really frustrating to get to a "workable solution in the last 3 days" using JavaObject as the original project extend Region that for some reason jut not want to show the UI "control". So, have edited the original Java code and short-circuited it to get into method "init" and then also got rid of the unnecessary CSS file as it basically contained sweet nothing and then compiled the code into a new Jar pointing using Java 19 with SLC.

You need to copy the attached Jar to your B4J additional libs folder

Run the attached B4J project - sure you will figure out the code in the Jar and then add additional methods using JavaObject including events.

I don't know what the possible repercussions of my short circuit could be but the Java experts on this forum can comment on it. But other control added (buttons) are responsive when clicked.

Looking forward to your comments and suggestions.

Sample Code:

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

#End Region

#AdditionalJar: OdoMeterJHS

Sub Process_Globals
    Private fx As JFX
    Private MainForm As Form
    Private xui As XUI
 
    Dim om As JavaObject
 
    Dim t As Timer
 
    Dim val As Double
    Private Button1 As Button
    Private Button2 As Button
    Private Button3 As Button
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1")
    MainForm.Show
 
    om.InitializeNewInstance("eu.hansolo.fx.odometer.Odometer", Array(8,1))
 
    Form1.RootPane.AddNode(om, 2dip, 2dip, 300dip, 50dip)

    t.Initialize("t", 5)

    val = 0.0
    om.RunMethodJO("setValue", Array(val))
 
End Sub

Sub t_tick
    val = val + 0.001
    om.RunMethodJO("setValue", Array(val))
End Sub

Private Sub Button1_Click
 
    t.Enabled = True
 
End Sub

Private Sub Button2_Click
 
    t.Enabled = False
 
End Sub

Private Sub Button3_Click
 
    val = 0.0
    om.RunMethodJO("setValue", Array(val))
 
End Sub

 

[Mashiane]

Thanks Mr Wizard. Looking at your code above makes me realize that I learn new things from you.

I still wish you could write that book on how you wrap stuff to b4x.

 

[rwblinn]

I still wish you could write that book on how you wrap stuff to b4x.

Agree ... or a cheat sheet.

Lately I have been wrapping a bunch of B4R libraries but (kind of) forgotten how to do that in B4J esp. modifying existing Java libraries > compile > create JARs to be used by B4J.
Would appreciate some guidance or step-by-step howto ...

 

[Magma]

Thanks Mr Wizard. Looking at your code above makes me realize that I learn new things from you.

I still wish you could write that book on how you wrap stuff to b4x.

+1