Imports EgtWPFLib5
Imports EgtWPFLib5.EgtFloating

Public Class OperationExpanderV

   Private m_OperationExpanderVM As OperationExpanderVM

   Private EgtFloatingTray As EgtFloatingTray
   Private OptionPanelView As UserControl
   Private OptionPanelViewStackPanel As StackPanel
   'Private OperationParameters As ContentPresenter
   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

#Region "CONSTRUCTOR"

   Sub New()
      ' Funzione che interpreta l'xaml
      InitializeComponent()
      ' Assegno al riferimento locale al VM il VM preso dal DataContext
      m_OperationExpanderVM = DirectCast(Me.DataContext, OperationExpanderVM)
   End Sub

#End Region    ' CONSTRUCTOR

#Region "EVENTS"

   Private Sub MachiningOpListBoxItem_LostKeyboardFocus(sender As Object, e As KeyboardFocusChangedEventArgs)
      Dim TextBox As TextBox = TryCast(sender, TextBox)
      If IsNothing(TextBox) Then Return
      Dim SelOp As MachiningOpListBoxItem = TryCast(TextBox.DataContext, MachiningOpListBoxItem)
      If IsNothing(SelOp) Then Return
      If MachiningOpListBoxItem.m_CloseModifyLostFocus Then
         SelOp.ModifyNameEsc()
      Else
         If MachiningOpListBoxItem.m_Spy Then
            MachiningOpListBoxItem.m_CloseModifyLostFocus = True
            MachiningOpListBoxItem.m_Spy = False
         End If
         Keyboard.Focus(sender)
      End If
   End Sub

   Private Sub MachiningOpListBoxItem_IsVisibleChanged(sender As Object, e As DependencyPropertyChangedEventArgs)
      If e.NewValue Then
         Keyboard.Focus(sender)
      End If
   End Sub

#End Region    ' EVENTS

   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(2), 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