TreeTable Collapse/Expand Buttons

Please show your code setting up the table

Here are you;

private fun buildOverviewPanel(set: TraceSpanSet): JBScrollPane{
 root = set.node()

 val model = TraceChartTableModel(root)
 val table = TraceChartTable(model) // extend of TreeTableView

 table.apply{
  autoResizeMode = 4
  autoCreateColumnsFromModel = true
  rowSelectionAllowed = true

  setRootVisible(true)
  showsRootHandles = true
  columnModel.apply{
   getColumn(0).cellRenderer = RENDERER_SERVICE_NAME
   getColumn(1).cellRenderer = RENDERER_OPERATION_NAME
   getColumn(2).cellRenderer = DurationCellRenderer(set.overallDuration())
  }
 }

 return JBScrollPane(table, 20, 31)
}

The whole table is made with IntelliJ components. I've tried many solutions like this, but nothing has changed; https://intellij-support.jetbrains.com/hc/en-us/community/posts/205965224/comments/205068104

Have you tried to specify TreeColumnInfo for the first column?

Looks like the following code overrides tree-based renderer with the list-based one:

   getColumn(0).cellRenderer = RENDERER_SERVICE_NAME

You have to specify TreeTable#setTreeCellRenderer for a tree column.

Also, I recommend trying JBTreeTable instead.

The following method of your model have to return TreeTableModel.class for the tree-based column:

public Class getColumnClass(int column) {
  return (column == 0) ? TreeTableModel.class : String.class;
}

Could you please check it?

(sorry for late answer)

Thanks for your answers. I changed my code according to what you said and tried again, it worked exactly as I wanted it.



A revised version of the code for who has the same problem as me of:

private fun buildOverviewPanel(set: TraceSpanSet): JBScrollPane{
 root = set.node()

 val model = TreeTableModel(root)
 val table = JBTreeTable(model)

 table.apply{
  tree.apply{
    showsRootHandles = true
    isRootVisible = true
    cellRenderer = CellRenderer()
  }
}

 return JBScrollPane(table, 20, 31)
}

// Cell Renderer Class
class CellRenderer : ColoredTreeCellRenderer(){

 override fun customizeCellRenderer(
    tree: JTree,
    value: Any?,
    selected: Boolean,
    expanded: Boolean,
    leaf: Boolean,
    row: Int,
    hasFocus: Boolean
 ) {
    append("your string")
  }
}

// Table Model Class -> getColumnClass
override fun getColumnClass(columnIndex: Int): Class<*> = when(columnIndex){
    0 -> TreeTableModel::class.java
    1 -> String::class.java
    2 -> Int::class.java
    else -> throw IllegalArgumentException("Column is out of bound. ColumnIndex=$columnIndex")
}