Imports EgtWPFLib5
Imports EgtWPFLib5.EgtFloating

Public Class OperationExpanderView

   Private EgtFloatingTray As EgtFloatingTray
   Private OptionPanelView As UserControl
   Private OptionPanelViewStackPanel As StackPanel
   Private MachiningTreeContentPresenter As ContentPresenter
   Private MachiningTreeUserControl As UserControl
   Private MachiningTreeExpander As Expander
   Private SimulationContentPresenter As ContentPresenter
   Private SimulationUserControl As UserControl
   Private SimulationExpanderStackPanel As StackPanel
   Private SimulationExpander As Expander
   Private GenerateButton As Button

   Private m_bFirst As Boolean = True

   Private Sub OperationExpanderView_Loaded(sender As Object, e As System.Windows.RoutedEventArgs) Handles Me.Loaded
      If m_bFirst Then
         EgtFloatingTray = FindAncestor(Of EgtFloatingTray)(Me)
         OptionPanelView = FindAncestor(Of UserControl)(Me)
         OptionPanelViewStackPanel = DirectCast(OptionPanelView.Content, StackPanel)
         MachiningTreeContentPresenter = DirectCast(OptionPanelViewStackPanel.Children(1), ContentPresenter)
         MachiningTreeUserControl = DirectCast(MachiningTreeContentPresenter.Content, UserControl)
         MachiningTreeExpander = DirectCast(MachiningTreeUserControl.Content, Expander)
         SimulationContentPresenter = DirectCast(OptionPanelViewStackPanel.Children(2), ContentPresenter)
         SimulationUserControl = DirectCast(SimulationContentPresenter.Content, UserControl)
         SimulationExpanderStackPanel = DirectCast(SimulationUserControl.Content, StackPanel)
         SimulationExpander = DirectCast(SimulationExpanderStackPanel.Children(0), Expander)
         GenerateButton = DirectCast(SimulationExpanderStackPanel.Children(1), Button)
         ' Gestisco l'evento SizeChanged della Tray 
         AddHandler EgtFloatingTray.SizeChanged, AddressOf OperationExpanderTray_SizeChanged
         m_bFirst = False
      End If
      CalculateOperationParametersStackPanelMaxHeight()
   End Sub

   Private Sub OperationExpanderTray_SizeChanged(sender As Object, e As System.Windows.SizeChangedEventArgs)
      CalculateOperationParametersStackPanelMaxHeight()
      For Each Expander In OperationParametersStackPanel.Children
         If TypeOf Expander Is Expander Then
            Dim CurrExpander As Expander = DirectCast(Expander, Expander)
            CurrExpander.IsExpanded = False
         End If
      Next
   End Sub

   Private Sub CalculateOperationParametersStackPanelMaxHeight()
      Dim OccupiedHeight As Double = 0
      If Not MachiningTreeExpander.IsExpanded Then
         OccupiedHeight += MachiningTreeExpander.ActualHeight
      Else
         Dim MachiningTreeExpanderContent As FrameworkElement = DirectCast(MachiningTreeExpander.Content, FrameworkElement)
         MachiningTreeExpanderContent.Measure(New Size(Double.PositiveInfinity, Double.PositiveInfinity))
         OccupiedHeight += (MachiningTreeExpander.ActualHeight - MachiningTreeExpanderContent.DesiredSize.Height)
      End If
      If Not SimulationExpander.IsExpanded Then
         OccupiedHeight += SimulationExpander.ActualHeight
      Else
         Dim SimulationExpanderContent As FrameworkElement = DirectCast(SimulationExpander.Content, FrameworkElement)
         SimulationExpanderContent.Measure(New Size(Double.PositiveInfinity, Double.PositiveInfinity))
         OccupiedHeight += (SimulationExpander.ActualHeight - SimulationExpanderContent.DesiredSize.Height)
      End If
      OccupiedHeight += GenerateButton.ActualHeight
      'Aggiungo altezza OperationsList header Expander
      If Not OperationsListExpander.IsExpanded Then
         OccupiedHeight += OperationsListExpander.ActualHeight
      Else
         Dim OperationsListExpanderContent As FrameworkElement = DirectCast(OperationsListExpander.Content, FrameworkElement)
         OperationsListExpanderContent.Measure(New Size(Double.PositiveInfinity, Double.PositiveInfinity))
         OccupiedHeight += (OperationsListExpander.ActualHeight - OperationsListExpanderContent.DesiredSize.Height)
      End If
      If Not OperationParametersExpander.IsExpanded Then
         OccupiedHeight += OperationParametersExpander.ActualHeight
      Else
         Dim OperationParametersExpanderContent As FrameworkElement = DirectCast(OperationParametersExpander.Content, FrameworkElement)
         OperationParametersExpanderContent.Measure(New Size(Double.PositiveInfinity, Double.PositiveInfinity))
         OccupiedHeight += (OperationParametersExpander.ActualHeight - OperationParametersExpanderContent.DesiredSize.Height)
      End If
      ' Aggiungo altezza contenuto OperationParameters che però è fuori dallo Stackpanel
      OperationFirstParametersStackPanel.Measure(New Size(Double.PositiveInfinity, Double.PositiveInfinity))
      If OperationFirstParametersStackPanel.DesiredSize.Height <> 0 Then
         OccupiedHeight += OperationFirstParametersStackPanel.DesiredSize.Height
      Else
         ' aggiungo il valore calcolato provando se non viene calcolato dal sistema al momento
         OccupiedHeight += 10
      End If
      OperationParametersStackPanel.MaxHeight = OptionPanelViewStackPanel.MaxHeight - OccupiedHeight
   End Sub

   ' Funzione che permette di trovare il primo contenitore di tipo T di un elemento grafico dependencyObject 
   Public Function FindAncestor(Of T As Class)(dependencyObject As DependencyObject) As T
      Dim target As DependencyObject = dependencyObject
      Do
         target = LogicalTreeHelper.GetParent(target)
      Loop While target IsNot Nothing AndAlso Not (TypeOf target Is T)
      If IsNothing(target) Then
         target = dependencyObject
         Do
            target = VisualTreeHelper.GetParent(target)
         Loop While target IsNot Nothing AndAlso Not (TypeOf target Is T)
      End If
      Return TryCast(target, T)
   End Function

End Class