3

I am trying to link to a different page from an SVG but the link causes the page to open within the containing and not the specified page.

Basic samples of my code:

HTML

<object data="/Sample.svg" type="image/svg+xml" class="Svg">
    <a href="/Sample.svg">
        <!--[if lte IE 8 ]-->
        <p class="SvgFallback">Fallback text</a></p>
    </a>
</object>

Link within Sample.svg

<a xlink:href="/Page.aspx">
  <tspan x="14.78" y="8.4" fill="#FFFFFF" font-family="'UniversLTStd-Black'"        font-size="7"> Sample</tspan><tspan x="0" y="16.8" fill="#FFFFFF" font-family="'UniversLTStd-Black'" font-size="7">page</tspan>
</a>

Undo/Redo for Listview LabelEdit and Checkbox selection

I've done this usercontrol with an UndoRedo Manager integrated with the help of some people.

At the moment it only can undo/redo when you add or delete an item and that's all, but I would like to implement LabelEdit undo/redo and checkbox undo/redo.

PS: Notice that the Listview_Action expects an ListviewItem

Here is the Undo/Redo manager Class, is not the full code but just the necessary.

What changes I need to perform in this Class to add the improvements that I need?

Please I will appreciate it if someone could show me a full code example.

Public Class myListView : Inherits ListView

    Public Event ItemAdded As EventHandler(Of ItemAddedEventArgs)
    Public Class ItemAddedEventArgs : Inherits EventArgs
        Property Item As ListViewItem
    End Class

    Public Event ItemRemoved As EventHandler(Of ItemRemovedEventArgs)
    Public Class ItemRemovedEventArgs : Inherits EventArgs
        Property Item As ListViewItem
    End Class

#Region " Undo/Redo Manager "

    ''' <summary>
    ''' Enable or disble the Undo/Redo monitoring.
    ''' </summary>
    Public Property Enable_UndoRedo_Manager As Boolean = False

    ' Stacks to store Undo/Redo actions.
    Private Property Undostack As New Stack(Of ListView_Action)
    Private Property Redostack As New Stack(Of ListView_Action)

    ' Flags to check if it is doing a Undo/Redo operation.
    Private IsDoingUndo As Boolean = False
    Private IsDoingRedo As Boolean = False

    ' Delegate to Add an Item for Undo/Redo operations.
    Private Delegate Sub AddDelegate(item As ListViewItem)

    ' Delegate to Remove an Item for Undo/Redo operations.
    Private Delegate Sub RemoveDelegate(item As ListViewItem)

    ' The Undo/Redo action.
    Private action As ListView_Action = Nothing

    ' The operation.
    Public Enum Operation As Short
        Undo = 0
        Redo = 1
    End Enum

    ' The method for the Undo/Redo operation.
    Public Enum Method As Short
        Add = 0
        Remove = 1
    End Enum

    ''' <summary>
    ''' Creates a Undo/Redo Action.
    ''' </summary>
    Class ListView_Action

        ''' <summary>
        ''' Names the Undo/Redo Action.
        ''' </summary>
        Property Name As String

        ''' <summary>
        ''' Points to a method to excecute.
        ''' </summary>
        Property Operation As [Delegate]

        ''' <summary>
        ''' Method of the Undo/Redo operation.
        ''' </summary>
        Property Method As Method

        ''' <summary>
        ''' Data Array for the method to excecute.
        ''' </summary>
        Property Data As ListViewItem

    End Class

    ''' <summary>
    ''' This event is raised after an Undo/Redo action is performed.
    ''' </summary>
    Public Event UndoRedo_IsPerformed As EventHandler(Of UndoneRedoneEventArgs)
    Public Class UndoneRedoneEventArgs : Inherits EventArgs
        Property Operation As Operation
        Property Method As Method
        Property Item As ListViewItem
        Property UndoStack As Stack(Of ListView_Action)
        Property RedoStack As Stack(Of ListView_Action)
    End Class

    ''' <summary>
    ''' This event is raised when Undo/Redo Stack size changed.
    ''' </summary>
    Public Event UndoRedo_StackSizeChanged As EventHandler(Of StackSizeChangedEventArgs)
    Public Class StackSizeChangedEventArgs : Inherits EventArgs
        Property UndoStack As Stack(Of ListView_Action)
        Property RedoStack As Stack(Of ListView_Action)
        Property UndoStackIsEmpty As Boolean
        Property RedoStackIsEmpty As Boolean
    End Class

    ''' <summary>
    ''' Undo the last action.
    ''' </summary>
    Public Sub Undo()

        If Me.Undostack.Count = 0 Then Exit Sub ' Nothing to Undo.

        Me.IsDoingUndo = True
        Me.action = Me.Undostack.Pop ' Get the Action from the Stack and remove it.
        Me.action.Operation.DynamicInvoke(Me.action.Data) ' Invoke the undo Action.
        Me.IsDoingUndo = False

        Raise_UndoRedo_IsPerformed(Operation.Undo, Me.action.Method, Me.action.Data)

    End Sub

    ''' <summary>
    ''' Redo the last action.
    ''' </summary>
    Public Sub Redo()

        If Me.Redostack.Count = 0 Then Exit Sub ' Nothing to Redo.

        Me.IsDoingRedo = True
        Me.action = Me.Redostack.Pop() ' Get the Action from the Stack and remove it.
        Me.action.Operation.DynamicInvoke(Me.action.Data) ' Invoke the redo Action.
        Me.IsDoingRedo = False

        Raise_UndoRedo_IsPerformed(Operation.Redo, Me.action.Method, Me.action.Data)

    End Sub

    ' Reverses an Undo/Redo action
    Private Function GetReverseAction(ByVal e As UndoneRedoneEventArgs) As ListView_Action

        Me.action = New ListView_Action

        Me.action.Name = e.Item.Text
        Me.action.Data = e.Item

        Me.action.Operation = If(e.Method = Method.Add, _
                        New RemoveDelegate(AddressOf Me.RemoveItem), _
                        New AddDelegate(AddressOf Me.AddItem))

        Me.action.Method = If(e.Method = Method.Add, _
                     Method.Remove, _
                     Method.Add)

        Return Me.action

    End Function

    ' Raises the "UndoRedo_IsPerformed" Event
    Private Sub Raise_UndoRedo_IsPerformed(ByVal Operation As Operation, _
                                           ByVal Method As Method, _
                                           ByVal Item As ListViewItem)

        RaiseEvent UndoRedo_IsPerformed(Me, New UndoneRedoneEventArgs _
                   With {.Item = Item, _
                         .Method = Method, _
                         .Operation = Operation, _
                         .UndoStack = Me.Undostack, _
                         .RedoStack = Me.Redostack})

        Raise_UndoRedo_StackSizeChanged()

    End Sub

    ' Raises the "UndoRedo_StackSizeChanged" Event
    Private Sub Raise_UndoRedo_StackSizeChanged()

        RaiseEvent UndoRedo_StackSizeChanged(Me, New StackSizeChangedEventArgs _
                   With {.UndoStack = Me.Undostack, _
                         .RedoStack = Me.Redostack, _
                         .UndoStackIsEmpty = Me.Undostack.Count = 0, _
                         .RedoStackIsEmpty = Me.Redostack.Count = 0})

    End Sub

    ' This handles when an Undo or Redo operation is performed.
    Private Sub UndoneRedone(ByVal sender As Object, ByVal e As UndoneRedoneEventArgs) _
    Handles Me.UndoRedo_IsPerformed

        Select Case e.Operation

            Case Operation.Undo
                ' Create a Redo Action for the undone action.
                Me.Redostack.Push(GetReverseAction(e))

            Case Operation.Redo
                ' Create a Undo Action for the redone action.
                Me.Undostack.Push(GetReverseAction(e))

        End Select

    End Sub

    ' Monitors when an Item is added to create an Undo Operation.
    Private Sub OnItemAdded(sender As Object, e As ItemAddedEventArgs) _
    Handles Me.ItemAdded

        If Me.Enable_UndoRedo_Manager _
            AndAlso (Not Me.IsDoingUndo And Not Me.IsDoingRedo) Then

            Me.Redostack.Clear()

            ' // Crate an Undo Action
            Me.action = New ListView_Action
            Me.action.Name = e.Item.Text
            Me.action.Operation = New RemoveDelegate(AddressOf Me.RemoveItem)
            Me.action.Data = e.Item
            Me.action.Method = Method.Remove

            Me.Undostack.Push(action)

            Raise_UndoRedo_StackSizeChanged()

        End If

    End Sub

    ' Monitors when an Item is removed to create an Undo Operation.
    Private Sub OnItemRemoved(sender As Object, e As ItemRemovedEventArgs) _
    Handles Me.ItemRemoved

        If Me.Enable_UndoRedo_Manager _
            AndAlso (Not Me.IsDoingUndo And Not Me.IsDoingRedo) Then

            Me.Redostack.Clear()

            ' // Crate an Undo Action
            Me.action = New ListView_Action
            Me.action.Name = e.Item.Text
            Me.action.Operation = New AddDelegate(AddressOf Me.AddItem)
            Me.action.Data = e.Item
            Me.action.Method = Method.Add

            Me.Undostack.Push(action)

            Raise_UndoRedo_StackSizeChanged()

        End If

    End Sub

#End Region

End Class
4

1 回答 1

1

像这样:

<a href="/Sample.svg" target="_top">

target 指定链接应该在哪里打开,_top 使它成为整页。

于 2013-11-07T15:33:03.380 回答