B4J Question TableView - set cell contents

[atiaust]

Hi All,

I am trying to set/change the contents of an individual cell in a tableView.

I have followed the example from Erel, 'tableExample' and it works with 1 form and 1 tableView.

Sub btnUpdate_Action
    If TableView1.SelectedRow = -1 Then Return
    SetCellValue(TableView1.SelectedRow, 1, txtValue.Text)
End Sub

Sub SetCellValue(RowIndex As Int, CellIndex As Int, Value As String)
    Log ("rowIndex= "&RowIndex&", CellIndex = "&CellIndex&", value = "&Value)
    GetLabel(RowIndex, CellIndex).Text = Value
End Sub

Sub GetLabel(RowIndex As Int, CellIndex As Int) As Label
    Dim row() As Object = TableView1.Items.Get(RowIndex)
    Log("Cell Index = "&row(CellIndex))
    Return row(CellIndex)
End Sub

Log results..

Spoiler: Log

Waiting for debugger to connect...
Program started.
Cell Index = Label@22135a[styleClass=label]'Item #005'
Cell Index = Label@3259ce[styleClass=label]'5'
rowIndex= 4, CellIndex = 1, value = a55
Cell Index = Label@3259ce[styleClass=label]'5'

In my app I use the same code except the tableView is on a form that is opened on top of the main form and I get an error. This form has 2 tableViews on it.

'....other code above
    Dim value As String = lblAvailable.text
    setTripCellValue(tripIndex,3,value)
End Sub

'Change cell values in the 'tvTrip' tableView
Sub setTripCellValue(RowIndex As Int, CellIndex As Int, Value As String)
    Log("SelectdRow = "&RowIndex&", Cell Index = "&CellIndex&", value = "&Value)
    GetTripLabel(RowIndex,CellIndex).Text = Value
End Sub
'
Sub GetTripLabel(RowIndex As Int, CellIndex As Int) As Label
    Log("Row Index = "&RowIndex&", CellIndex = "&CellIndex)
    Dim row() As Object = tvTrip.Items.Get(RowIndex)
    Log("Cell Index = "&row(CellIndex))
    Return row(CellIndex)
End Sub

Spoiler: Error

SelectdRow = 0, Cell Index = 3, value = 10
Row Index = 0, CellIndex = 3
Cell Index = 10
Error occurred on line: 383 (paxSchedule)
java.lang.ClassCastException: java.lang.String cannot be cast to javafx.scene.control.Label
at b4j.CCShuttle.paxschedule._gettriplabel(paxschedule.java:783)
at b4j.CCShuttle.paxschedule._settripcellvalue(paxschedule.java:372)
at b4j.CCShuttle.paxschedule._btntripselect_action(paxschedule.java:356)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:613)

The code is for all intensive purposes the same except for the table and variable names but outputs totally different log values and the second version errors. I have tried everything I can think of to find the problem.

Any ideas.

Thanks

 

[Daestrum]

Are you sure the table has been built correctly?
It looks like the table does not have a label in the row where your code expects one.
(This would explain why Erel's code prints Label@.... and yours prints a value, and the error when it tries to return a Label but has only a String value)

 

[atiaust]

Thanks, good point.

I will check out how the table is built.

 

[atiaust]

Daesstrum,

I thought I had built the tableView pretty much the same as Erel's example, but I missed creating the labels.

Thanks