B4J Question LoadLayout

[Daestrum]

Not sure if its me misunderstanding the usage of LoadLayout, but here comes the explanation of the problem I have.

I have a project that has basically one main screen, into that I load various layouts depending on user interaction. As some screens need more space than others, I dynamically change the main screen size, and restore it when I leave the screen.

I have a routine which handles the saving and restore of the screen size title etc.

In Main class file I use

Public Sub Initialize
    m = Main.MainForm
    WindowHandler.saveWindow(m)
    WindowHandler.newWindowLayout(m,350,400,"Log In2","loginScreen")
    Dim fred As String = "loginScreen" 
    m.RootPane.LoadLayout(fred)
    m.Show
End Sub

and all works as expected.

In the WindowHandler class I use this:

Public Sub newWindowLayout(m As Form,h As Double,w As Double,t As String,lout As String)
    Log("new window")
    m.RootPane.RemoveAllNodes
    m.WindowHeight = h
    m.WindowWidth = w
    m.Title = t
    'm.RootPane.LoadLayout(lout)            ' <<<<<< this wont work, produces exception
End Sub

The height width title all get set correctly.

Sorry for long post - been trying for ages to discover why one works and one causes exception.

 

[stevel05]

Sub Process_Globals
    Private fx As JFX
    Private MainForm,New As Form
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("1") 'Load the layout file.
    MainForm.Show
    New.Initialize("Test",400,300)
    newWindowLayout(New,300,400,"New Form","2")
    New.Show
End Sub
Public Sub newWindowLayout(m As Form,h As Double,w As Double,t As String,lout As String)
    Log("new window")
    m.RootPane.RemoveAllNodes
    m.WindowHeight = h
    m.WindowWidth = w
    m.Title = t
    m.RootPane.LoadLayout(lout)            ' <<<<<< this wont work, produces exception
End Sub

It works for me, what exception are you getting?

 

[Erel]

If you haven't solved it then please upload your project (File - Export as zip).

 

[Daestrum]

Sorry for delay.
Here is the project zip (some classes are empty at present)

 

[Erel]

Thank you. Your code helped me fix a debugger bug (related to both B4A and B4J).

Classes instances must be initialized. I think that you are confusing code modules with classes.

This is the cause of this error.

 

[Daestrum]

Thank you Erel for the reply.

 

[Daestrum]

Finally I understand, couldn't understand why something I can do so easilyy in pure Java was giving me such a problem.
I was over thinking the problem, trying to do too much, when B4J would do it for me.

Maybe this tiny example will help others understand. It just provides a way of traversing screens forward and back.

 

[manios]

While testing I get the following error:

Parsing code.                          0.00
Compiling code.                        0.05
Compiling debugger engine code.        Error
javac 1.7.0_45
shell\src\finally\sorted\loginscreen.java:2: error: <identifier> expected
package finally.sorted;
      ^
1 error

Any idea where to look?
Other testprograms compile OK

 

[Daestrum]

While testing I get the following error:

Parsing code.                          0.00
Compiling code.                        0.05
Compiling debugger engine code.        Error
javac 1.7.0_45
shell\src\finally\sorted\loginscreen.java:2: error: <identifier> expected
package finally.sorted;
      ^
1 error

Any idea where to look?
Other testprograms compile OK

Just change the package name - I changed it to 'finally.sorted' which it doesn't like. Sorry.

 

[manios]

Just change the package name - I changed it to 'finally.sorted' which it doesn't like. Sorry.

Thanks for the quick answer, but which name should it have then?

 

[Daestrum]

I think was either b4a.example or b4j.example originally

 

[Erel]

The problem is that finally is a java keyword. Change it to any other package name.