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| Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Controls.Primitives
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Shapes
''' <summary>
''' Specifies different collapse modes of a _3GRCGridSplitterAdvanced.
''' </summary>
Public Enum GridSplitterCollapseMode
''' <summary>
''' The _3GRCGridSplitterAdvanced cannot be collapsed or expanded.
''' </summary>
None = 0
''' <summary>
''' The column (or row) to the right (or below) the
''' splitter's column, will be collapsed.
''' </summary>
[Next] = 1
''' <summary>
''' The column (or row) to the left (or above) the
''' splitter's column, will be collapsed.
''' </summary>
Previous = 2
End Enum
''' <summary>
''' An updated version of the standard _3GRCGridSplitterAdvanced control that includes a centered handle
''' which allows complete collapsing and expanding of the appropriate grid column or row.
''' </summary>
<TemplatePart(Name:=_3GRCGridSplitterAdvanced.ELEMENT_HORIZONTAL_HANDLE_NAME, Type:=GetType(ToggleButton))> _
<TemplatePart(Name:=_3GRCGridSplitterAdvanced.ELEMENT_VERTICAL_HANDLE_NAME, Type:=GetType(ToggleButton))> _
<TemplatePart(Name:=_3GRCGridSplitterAdvanced.ELEMENT_HORIZONTAL_TEMPLATE_NAME, Type:=GetType(FrameworkElement))> _
<TemplatePart(Name:=_3GRCGridSplitterAdvanced.ELEMENT_VERTICAL_TEMPLATE_NAME, Type:=GetType(FrameworkElement))> _
Public Class _3GRCGridSplitterAdvanced
Inherits System.Windows.Controls.GridSplitter
#Region "TemplateParts"
Public Const ELEMENT_HORIZONTAL_HANDLE_NAME As String = "HorizontalGridSplitterHandle"
Public Const ELEMENT_VERTICAL_HANDLE_NAME As String = "VerticalGridSplitterHandle"
Public Const ELEMENT_HORIZONTAL_TEMPLATE_NAME As String = "HorizontalTemplate"
Public Const ELEMENT_VERTICAL_TEMPLATE_NAME As String = "VerticalTemplate"
Public Const ELEMENT_GRIDSPLITTER_BACKGROUND As String = "GridSplitterBackground"
Private _elementHorizontalGridSplitterButton As ToggleButton
Private _elementVerticalGridSplitterButton As ToggleButton
Private _elementGridSplitterBackground As Rectangle
#End Region
#Region "Dependency Properties"
''' <summary>
''' Gets or sets a value that indicates the CollapseMode.
''' </summary>
Public Property CollapseMode() As GridSplitterCollapseMode
Get
Return CType(GetValue(CollapseModeProperty), GridSplitterCollapseMode)
End Get
Set(ByVal value As GridSplitterCollapseMode)
SetValue(CollapseModeProperty, value)
End Set
End Property
''' <summary>
''' Identifies the CollapseMode dependency property
''' </summary>
Public Shared ReadOnly CollapseModeProperty As DependencyProperty = DependencyProperty.Register("CollapseMode", GetType(GridSplitterCollapseMode), GetType(_3GRCGridSplitterAdvanced), New PropertyMetadata(GridSplitterCollapseMode.None, New PropertyChangedCallback(AddressOf OnCollapseModePropertyChanged)))
''' <summary>
''' Gets or sets the style that customizes the appearance of the horizontal handle
''' that is used to expand and collapse the _3GRCGridSplitterAdvanced.
''' </summary>
Public Property HorizontalHandleStyle() As Style
Get
Return DirectCast(GetValue(HorizontalHandleStyleProperty), Style)
End Get
Set(ByVal value As Style)
SetValue(HorizontalHandleStyleProperty, value)
End Set
End Property
''' <summary>
''' Identifies the HorizontalHandleStyle dependency property
''' </summary>
Public Shared ReadOnly HorizontalHandleStyleProperty As DependencyProperty = DependencyProperty.Register("HorizontalHandleStyle", GetType(Style), GetType(_3GRCGridSplitterAdvanced), Nothing)
'''<summary>
''' Gets or sets the style that customizes the appearance of the vertical handle
''' that is used to expand and collapse the _3GRCGridSplitterAdvanced.
''' </summary>
Public Property VerticalHandleStyle() As Style
Get
Return DirectCast(GetValue(VerticalHandleStyleProperty), Style)
End Get
Set(ByVal value As Style)
SetValue(VerticalHandleStyleProperty, value)
End Set
End Property
''' <summary>
''' Identifies the VerticalHandleStyle dependency property
''' </summary>
Public Shared ReadOnly VerticalHandleStyleProperty As DependencyProperty = DependencyProperty.Register("VerticalHandleStyle", GetType(Style), GetType(_3GRCGridSplitterAdvanced), Nothing)
''' <summary>
''' Gets or sets a value that indicates if the collapse and
''' expanding actions should be animated.
''' </summary>
Public Property IsAnimated() As Boolean
Get
Return CBool(GetValue(IsAnimatedProperty))
End Get
Set(ByVal value As Boolean)
SetValue(IsAnimatedProperty, value)
End Set
End Property
''' <summary>
''' Identifies the VerticalHandleStyle dependency property
''' </summary>
Public Shared ReadOnly IsAnimatedProperty As DependencyProperty = DependencyProperty.Register("IsAnimated", GetType(Boolean), GetType(_3GRCGridSplitterAdvanced), Nothing)
''' <summary>
''' Gets or sets a value that indicates if the target column is
''' currently collapsed.
''' </summary>
Public Property IsCollapsed() As Boolean
Get
Return CBool(GetValue(IsCollapsedProperty))
End Get
Set(ByVal value As Boolean)
SetValue(IsCollapsedProperty, value)
End Set
End Property
''' <summary>
''' Identifies the IsCollapsed dependency property
''' </summary>
Public Shared ReadOnly IsCollapsedProperty As DependencyProperty = DependencyProperty.Register("IsCollapsed", GetType(Boolean), GetType(_3GRCGridSplitterAdvanced), New PropertyMetadata(New PropertyChangedCallback(AddressOf OnIsCollapsedPropertyChanged)))
''' <summary>
''' The IsCollapsed property porperty changed handler.
''' </summary>
''' <param name="d">_3GRCGridSplitterAdvanced that changed IsCollapsed.</param>
''' <param name="e">An instance of DependencyPropertyChangedEventArgs.</param>
Private Shared Sub OnIsCollapsedPropertyChanged(ByVal d As DependencyObject, ByVal e As DependencyPropertyChangedEventArgs)
Dim s As _3GRCGridSplitterAdvanced = TryCast(d, _3GRCGridSplitterAdvanced)
Dim value As Boolean = CBool(e.NewValue)
s.OnIsCollapsedChanged(value)
End Sub
''' <summary>
''' The CollapseModeProperty property changed handler.
''' </summary>
''' <param name="d">_3GRCGridSplitterAdvanced that changed IsCollapsed.</param>
''' <param name="e">An instance of DependencyPropertyChangedEventArgs.</param>
Private Shared Sub OnCollapseModePropertyChanged(ByVal d As DependencyObject, ByVal e As DependencyPropertyChangedEventArgs)
Dim s As _3GRCGridSplitterAdvanced = TryCast(d, _3GRCGridSplitterAdvanced)
Dim value As GridSplitterCollapseMode = CType(e.NewValue, GridSplitterCollapseMode)
s.OnCollapseModeChanged(value)
End Sub
#End Region
#Region "Local Members"
Private _gridCollapseDirection As GridCollapseDirection = GridCollapseDirection.Auto
Private _savedGridLength As GridLength
Private _savedActualValue As Double
Private _animationTimeMillis As Double = 200
#End Region
#Region "Control Instantiation"
''' <summary>
''' Initializes a new instance of the _3GRCGridSplitterAdvanced class,
''' which inherits from System.Windows.Controls._3GRCGridSplitterAdvanced.
''' </summary>
Public Sub New()
MyBase.New()
' Set default values
DefaultStyleKey = GetType(_3GRCGridSplitterAdvanced)
CollapseMode = GridSplitterCollapseMode.None
IsAnimated = True
AddHandler Me.LayoutUpdated, AddressOf _3GRCGridSplitterAdvanced_LayoutUpdated
End Sub
Private Sub _3GRCGridSplitterAdvanced_LayoutUpdated(ByVal sender As Object, ByVal e As System.EventArgs)
_gridCollapseDirection = GetCollapseDirection()
End Sub
''' <summary>
''' This method is called when the tempalte should be applied to the control.
''' </summary>
Public Overrides Sub OnApplyTemplate()
MyBase.OnApplyTemplate()
_elementHorizontalGridSplitterButton = TryCast(GetTemplateChild(ELEMENT_HORIZONTAL_HANDLE_NAME), ToggleButton)
_elementVerticalGridSplitterButton = TryCast(GetTemplateChild(ELEMENT_VERTICAL_HANDLE_NAME), ToggleButton)
_elementGridSplitterBackground = TryCast(GetTemplateChild(ELEMENT_GRIDSPLITTER_BACKGROUND), Rectangle)
' Wire up the Checked and Unchecked events of the HorizontalGridSplitterHandle.
If _elementHorizontalGridSplitterButton IsNot Nothing Then
AddHandler _elementHorizontalGridSplitterButton.Checked, AddressOf GridSplitterButton_Checked
AddHandler _elementHorizontalGridSplitterButton.Unchecked, AddressOf GridSplitterButton_Unchecked
End If
' Wire up the Checked and Unchecked events of the VerticalGridSplitterHandle.
If _elementVerticalGridSplitterButton IsNot Nothing Then
AddHandler _elementVerticalGridSplitterButton.Checked, AddressOf GridSplitterButton_Checked
AddHandler _elementVerticalGridSplitterButton.Unchecked, AddressOf GridSplitterButton_Unchecked
End If
' Set default direction since we don't have all the components layed out yet.
_gridCollapseDirection = GridCollapseDirection.Auto
' Directely call these events so design-time view updates appropriately
OnCollapseModeChanged(CollapseMode)
OnIsCollapsedChanged(IsCollapsed)
End Sub
#End Region
#Region "Protected Members"
''' <summary>
''' Handles the property change event of the IsCollapsed property.
''' </summary>
''' <param name="isCollapsed">The new value for the IsCollapsed property.</param>
Protected Overridable Sub OnIsCollapsedChanged(ByVal isCollapsed As Boolean)
' Determine if we are dealing with a vertical or horizontal splitter.
If _gridCollapseDirection = GridCollapseDirection.Rows Then
If _elementHorizontalGridSplitterButton IsNot Nothing Then
' Sets the target ToggleButton's IsChecked property equal
' to the provided isCollapsed property.
_elementHorizontalGridSplitterButton.IsChecked = isCollapsed
End If
Else
If _elementVerticalGridSplitterButton IsNot Nothing Then
' Sets the target ToggleButton's IsChecked property equal
' to the provided isCollapsed property.
_elementVerticalGridSplitterButton.IsChecked = isCollapsed
End If
End If
End Sub
''' <summary>
''' Handles the property change event of the CollapseMode property.
''' </summary>
''' <param name="collapseMode">The new value for the CollapseMode property.</param>
Protected Overridable Sub OnCollapseModeChanged(ByVal collapseMode As GridSplitterCollapseMode)
' Hide the handles if the CollapseMode is set to None.
If collapseMode = GridSplitterCollapseMode.None Then
If _elementHorizontalGridSplitterButton IsNot Nothing Then
_elementHorizontalGridSplitterButton.Visibility = Visibility.Collapsed
End If
If _elementVerticalGridSplitterButton IsNot Nothing Then
_elementVerticalGridSplitterButton.Visibility = Visibility.Collapsed
End If
Else
' Ensure the handles are Visible.
If _elementHorizontalGridSplitterButton IsNot Nothing Then
_elementHorizontalGridSplitterButton.Visibility = Visibility.Visible
End If
If _elementVerticalGridSplitterButton IsNot Nothing Then
_elementVerticalGridSplitterButton.Visibility = Visibility.Visible
End If
'TODO: Add in error handling if current template does not include an existing ScaleTransform.
' Rotate the direction that the handle is facing depending on the CollapseMode.
If collapseMode = GridSplitterCollapseMode.Previous Then
If _elementHorizontalGridSplitterButton IsNot Nothing Then
_elementHorizontalGridSplitterButton.RenderTransform.SetValue(ScaleTransform.ScaleYProperty, -1.0)
End If
If _elementVerticalGridSplitterButton IsNot Nothing Then
_elementVerticalGridSplitterButton.RenderTransform.SetValue(ScaleTransform.ScaleXProperty, -1.0)
End If
ElseIf collapseMode = GridSplitterCollapseMode.[Next] Then
If _elementHorizontalGridSplitterButton IsNot Nothing Then
_elementHorizontalGridSplitterButton.RenderTransform.SetValue(ScaleTransform.ScaleYProperty, 1.0)
End If
If _elementVerticalGridSplitterButton IsNot Nothing Then
_elementVerticalGridSplitterButton.RenderTransform.SetValue(ScaleTransform.ScaleXProperty, 1.0)
End If
End If
End If
End Sub
#End Region
#Region "Collapse and Expand Methods"
''' <summary>
''' Collapses the target ColumnDefinition or RowDefinition.
''' </summary>
Private Sub Collapse()
Dim parentGrid As Grid = TryCast(MyBase.Parent, Grid)
Dim splitterIndex As Integer = Integer.MinValue
If _gridCollapseDirection = GridCollapseDirection.Rows Then
' Get the index of the row containing the splitter
splitterIndex = CInt(MyBase.GetValue(Grid.RowProperty))
' Determing the curent CollapseMode
If Me.CollapseMode = GridSplitterCollapseMode.[Next] Then
' Save the next rows Height information
_savedGridLength = parentGrid.RowDefinitions(splitterIndex + 1).Height
_savedActualValue = parentGrid.RowDefinitions(splitterIndex + 1).ActualHeight
' Collapse the next row
If IsAnimated Then
AnimateCollapse(parentGrid.RowDefinitions(splitterIndex + 1))
Else
parentGrid.RowDefinitions(splitterIndex + 1).SetValue(RowDefinition.HeightProperty, New GridLength(0))
End If
Else
' Save the previous row's Height information
_savedGridLength = parentGrid.RowDefinitions(splitterIndex - 1).Height
_savedActualValue = parentGrid.RowDefinitions(splitterIndex - 1).ActualHeight
' Collapse the previous row
If IsAnimated Then
AnimateCollapse(parentGrid.RowDefinitions(splitterIndex - 1))
Else
parentGrid.RowDefinitions(splitterIndex - 1).SetValue(RowDefinition.HeightProperty, New GridLength(0))
End If
End If
Else
' Get the index of the column containing the splitter
splitterIndex = CInt(MyBase.GetValue(Grid.ColumnProperty))
' Determing the curent CollapseMode
If Me.CollapseMode = GridSplitterCollapseMode.[Next] Then
' Save the next column's Width information
_savedGridLength = parentGrid.ColumnDefinitions(splitterIndex + 1).Width
_savedActualValue = parentGrid.ColumnDefinitions(splitterIndex + 1).ActualWidth
' Collapse the next column
If IsAnimated Then
AnimateCollapse(parentGrid.ColumnDefinitions(splitterIndex + 1))
Else
parentGrid.ColumnDefinitions(splitterIndex + 1).SetValue(ColumnDefinition.WidthProperty, New GridLength(0))
End If
Else
' Save the previous column's Width information
_savedGridLength = parentGrid.ColumnDefinitions(splitterIndex - 1).Width
_savedActualValue = parentGrid.ColumnDefinitions(splitterIndex - 1).ActualWidth
' Collapse the previous column
If IsAnimated Then
AnimateCollapse(parentGrid.ColumnDefinitions(splitterIndex - 1))
Else
parentGrid.ColumnDefinitions(splitterIndex - 1).SetValue(ColumnDefinition.WidthProperty, New GridLength(0))
End If
End If
End If
End Sub
''' <summary>
''' Expands the target ColumnDefinition or RowDefinition.
''' </summary>
Private Sub Expand()
Dim parentGrid As Grid = TryCast(MyBase.Parent, Grid)
Dim splitterIndex As Integer = Integer.MinValue
If _gridCollapseDirection = GridCollapseDirection.Rows Then
' Get the index of the row containing the splitter
splitterIndex = CInt(Me.GetValue(Grid.RowProperty))
' Determine the curent CollapseMode
If Me.CollapseMode = GridSplitterCollapseMode.[Next] Then
' Expand the next row
If IsAnimated Then
AnimateExpand(parentGrid.RowDefinitions(splitterIndex + 1))
Else
parentGrid.RowDefinitions(splitterIndex + 1).SetValue(RowDefinition.HeightProperty, _savedGridLength)
End If
Else
' Expand the previous row
If IsAnimated Then
AnimateExpand(parentGrid.RowDefinitions(splitterIndex - 1))
Else
parentGrid.RowDefinitions(splitterIndex - 1).SetValue(RowDefinition.HeightProperty, _savedGridLength)
End If
End If
Else
' Get the index of the column containing the splitter
splitterIndex = CInt(Me.GetValue(Grid.ColumnProperty))
' Determine the curent CollapseMode
If Me.CollapseMode = GridSplitterCollapseMode.[Next] Then
' Expand the next column
If IsAnimated Then
AnimateExpand(parentGrid.ColumnDefinitions(splitterIndex + 1))
Else
parentGrid.ColumnDefinitions(splitterIndex + 1).SetValue(ColumnDefinition.WidthProperty, _savedGridLength)
End If
Else
' Expand the previous column
If IsAnimated Then
AnimateExpand(parentGrid.ColumnDefinitions(splitterIndex - 1))
Else
parentGrid.ColumnDefinitions(splitterIndex - 1).SetValue(ColumnDefinition.WidthProperty, _savedGridLength)
End If
End If
End If
End Sub
''' <summary>
''' Determine the collapse direction based on the horizontal and vertical alignments
''' </summary>
Private Function GetCollapseDirection() As GridCollapseDirection
If MyBase.HorizontalAlignment <> HorizontalAlignment.Stretch Then
Return GridCollapseDirection.Columns
End If
If (MyBase.VerticalAlignment = VerticalAlignment.Stretch) AndAlso (MyBase.ActualWidth <= MyBase.ActualHeight) Then
Return GridCollapseDirection.Columns
End If
Return GridCollapseDirection.Rows
End Function
#End Region
#Region "Event Handlers and Throwers"
' Define Collapsed and Expanded evenets
Public Event Collapsed As EventHandler(Of EventArgs)
Public Event Expanded As EventHandler(Of EventArgs)
''' <summary>
''' Raises the Collapsed event.
''' </summary>
''' <param name="e">Contains event arguments.</param>
Protected Overridable Sub OnCollapsed(ByVal e As EventArgs)
' Dim handler As EventHandler(Of EventArgs) = Me.Collapsed
RaiseEvent Collapsed(Me, e)
End Sub
''' <summary>
''' Raises the Expanded event.
''' </summary>
''' <param name="e">Contains event arguments.</param>
Protected Overridable Sub OnExpanded(ByVal e As EventArgs)
' Dim handler As EventHandler(Of EventArgs) = Me.Expanded
RaiseEvent Expanded(Me, e)
End Sub
''' <summary>
''' Handles the Checked event of either the Vertical or Horizontal
''' GridSplitterHandle ToggleButton.
''' </summary>
''' <param name="sender">An instance of the ToggleButton that fired the event.</param>
''' <param name="e">Contains event arguments for the routed event that fired.</param>
Private Sub GridSplitterButton_Checked(ByVal sender As Object, ByVal e As RoutedEventArgs)
If IsCollapsed <> True Then
' In our case, Checked = Collapsed. Which means we want everything
' ready to be expanded.
Collapse()
IsCollapsed = True
' Deactivate the background so the splitter can not be dragged.
_elementGridSplitterBackground.IsHitTestVisible = False
'_elementGridSplitterBackground.Opacity = 0.5;
' Raise the Collapsed event.
OnCollapsed(EventArgs.Empty)
End If
End Sub
''' <summary>
''' Handles the Unchecked event of either the Vertical or Horizontal
''' GridSplitterHandle ToggleButton.
''' </summary>
''' <param name="sender">An instance of the ToggleButton that fired the event.</param>
''' <param name="e">Contains event arguments for the routed event that fired.</param>
Private Sub GridSplitterButton_Unchecked(ByVal sender As Object, ByVal e As RoutedEventArgs)
If IsCollapsed <> False Then
' In our case, Unchecked = Expanded. Which means we want everything
' ready to be collapsed.
Expand()
IsCollapsed = False
' Activate the background so the splitter can be dragged again.
_elementGridSplitterBackground.IsHitTestVisible = True
'_elementGridSplitterBackground.Opacity = 1;
' Raise the Expanded event.
OnExpanded(EventArgs.Empty)
End If
End Sub
#End Region
#Region "Collapse and Expand Animations"
#Region "Property for animating rows"
Private AnimatingRow As RowDefinition
Private Shared ReadOnly RowHeightAnimationProperty As DependencyProperty = DependencyProperty.Register("RowHeightAnimation", GetType(Double), GetType(_3GRCGridSplitterAdvanced), New PropertyMetadata(New PropertyChangedCallback(AddressOf RowHeightAnimationChanged)))
Private Property RowHeightAnimation() As Double
Get
Return CDbl(GetValue(RowHeightAnimationProperty))
End Get
Set(ByVal value As Double)
SetValue(RowHeightAnimationProperty, value)
End Set
End Property
Private Shared Sub RowHeightAnimationChanged(ByVal d As DependencyObject, ByVal e As DependencyPropertyChangedEventArgs)
TryCast(d, _3GRCGridSplitterAdvanced).AnimatingRow.Height = New GridLength(CDbl(e.NewValue))
End Sub
#End Region
#Region "Property for animating columns"
Private AnimatingColumn As ColumnDefinition
Private Shared ReadOnly ColWidthAnimationProperty As DependencyProperty = DependencyProperty.Register("ColWidthAnimation", GetType(Double), GetType(_3GRCGridSplitterAdvanced), New PropertyMetadata(New PropertyChangedCallback(AddressOf ColWidthAnimationChanged)))
Private Property ColWidthAnimation() As Double
Get
Return CDbl(GetValue(ColWidthAnimationProperty))
End Get
Set(ByVal value As Double)
SetValue(ColWidthAnimationProperty, value)
End Set
End Property
Private Shared Sub ColWidthAnimationChanged(ByVal d As DependencyObject, ByVal e As DependencyPropertyChangedEventArgs)
TryCast(d, _3GRCGridSplitterAdvanced).AnimatingColumn.Width = New GridLength(CDbl(e.NewValue))
End Sub
#End Region
''' <summary>
''' Uses DoubleAnimation and a StoryBoard to animated the collapsing
''' of the specificed ColumnDefinition or RowDefinition.
''' </summary>
''' <param name="definition">The RowDefinition or ColumnDefintition that will be collapsed.</param>
Private Sub AnimateCollapse(ByVal definition As Object)
Dim currentValue As Double
' Setup the animation and StoryBoard
Dim gridLengthAnimation As New DoubleAnimation()
gridLengthAnimation.Duration = New Duration(TimeSpan.FromMilliseconds(_animationTimeMillis))
Dim sb As New Storyboard()
' Add the animation to the StoryBoard
sb.Children.Add(gridLengthAnimation)
If _gridCollapseDirection = GridCollapseDirection.Rows Then
' Specify the target RowDefinition and property (Height) that will be altered by the animation.
Me.AnimatingRow = DirectCast(definition, RowDefinition)
Storyboard.SetTarget(gridLengthAnimation, Me)
Storyboard.SetTargetProperty(gridLengthAnimation, New PropertyPath("RowHeightAnimation"))
currentValue = AnimatingRow.ActualHeight
Else
' Specify the target ColumnDefinition and property (Width) that will be altered by the animation.
Me.AnimatingColumn = DirectCast(definition, ColumnDefinition)
Storyboard.SetTarget(gridLengthAnimation, Me)
Storyboard.SetTargetProperty(gridLengthAnimation, New PropertyPath("ColWidthAnimation"))
currentValue = AnimatingColumn.ActualWidth
End If
gridLengthAnimation.From = currentValue
gridLengthAnimation.[To] = 0
' Start the StoryBoard.
sb.Begin()
End Sub
''' <summary>
''' Uses DoubleAnimation and a StoryBoard to animate the expansion
''' of the specificed ColumnDefinition or RowDefinition.
''' </summary>
''' <param name="definition">The RowDefinition or ColumnDefintition that will be expanded.</param>
Private Sub AnimateExpand(ByVal definition As Object)
Dim currentValue As Double
' Setup the animation and StoryBoard
Dim gridLengthAnimation As New DoubleAnimation()
gridLengthAnimation.Duration = New Duration(TimeSpan.FromMilliseconds(_animationTimeMillis))
Dim sb As New Storyboard()
' Add the animation to the StoryBoard
sb.Children.Add(gridLengthAnimation)
If _gridCollapseDirection = GridCollapseDirection.Rows Then
' Specify the target RowDefinition and property (Height) that will be altered by the animation.
Me.AnimatingRow = DirectCast(definition, RowDefinition)
Storyboard.SetTarget(gridLengthAnimation, Me)
Storyboard.SetTargetProperty(gridLengthAnimation, New PropertyPath("RowHeightAnimation"))
currentValue = AnimatingRow.ActualHeight
Else
' Specify the target ColumnDefinition and property (Width) that will be altered by the animation.
Me.AnimatingColumn = DirectCast(definition, ColumnDefinition)
Storyboard.SetTarget(gridLengthAnimation, Me)
Storyboard.SetTargetProperty(gridLengthAnimation, New PropertyPath("ColWidthAnimation"))
currentValue = AnimatingColumn.ActualWidth
End If
gridLengthAnimation.From = currentValue
gridLengthAnimation.[To] = _savedActualValue
' Start the StoryBoard.
sb.Begin()
End Sub
#End Region
''' <summary>
''' An enumeration that specifies the direction the _3GRCGridSplitterAdvanced will
''' be collapased (Rows or Columns).
''' </summary>
Friend Enum GridCollapseDirection
Auto
Columns
Rows
End Enum
End Class |
