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我想出了下面的代码来产生你在 MAC 和一些 jquery 网站上看到的类似“GROWL”的效果。（可以在此处找到此类示例。我使用的代码效果很好，并且可以很好地显示消息。但是，我很难开始工作的问题是如何显示当前消息 ABOVE每个先前的消息仍然在屏幕上，并且每个消息都有一个计时器弹出。目前它同时关闭所有消息框。

代码是这样的：

Public Class Growl
Private _notifications As New Dictionary(Of Integer, msgWindow)
Private _count As Integer = 0

Public Sub Remove(ByVal Sender As msgWindow, ByVal e As EventArgs)
    _notifications.Remove(CInt(Val(Sender.Name.Substring(1))))
    RefreshPositions()
End Sub

Private Sub RefreshPositions()
    Dim _top As Integer = 5
    For a As Integer = 0 To _count
        If _notifications.ContainsKey(a) Then
            _notifications.Item(a).Top = _top
            _top += _notifications.Item(a).Height + 5
        End If
    Next
End Sub

Public Sub ShowMessageBox(ByVal typeOfNotification As String, ByVal msg As String)
    Dim x As New msgWindow

    x.Name = "m" & _count
    AddHandler x.FormClosed, AddressOf Remove
    _notifications(_count) = x
    _count += 1
    x.showMessageBox(typeOfNotification, msg)
    RefreshPositions()
End Sub
End Class

这是消息框代码本身：

Public Class msgWindow
Public howLong As Integer
Public theType As String
Private loading As Boolean
Dim intX As Integer = Screen.PrimaryScreen.Bounds.Width

Protected Overrides Sub OnPaint(ByVal pe As System.Windows.Forms.PaintEventArgs)
    Dim pn As New Pen(Color.DarkGreen)

    If theType = "OK" Then
        pn.Color = Color.DarkGreen
    ElseIf theType = "ERR" Then
        pn.Color = Color.DarkRed
    Else
        pn.Color = Color.DarkOrange
    End If

    Me.Width = intX
    Me.Left = 0
    Me.Top = 0

    lblSaying.Width = Me.Width
    pn.Width = 2
    pe.Graphics.DrawRectangle(pn, 0, 0, Me.Width, Me.Height)
    pn = Nothing
End Sub

Public Sub showMessageBox(ByVal typeOfBox As String, ByVal theMessage As String)
    Me.Opacity = 0
    Me.Show()
    'Me.SetDesktopLocation(My.Computer.Screen.WorkingArea.Width - 300, 15)

    Me.loading = True
    theType = typeOfBox
    lblSaying.Text = theMessage

    If typeOfBox = "OK" Then
        Me.BackColor = Color.FromArgb(192, 255, 192)
    ElseIf typeOfBox = "ERR" Then
        Me.BackColor = Color.FromArgb(255, 192, 192)
    Else
        Me.BackColor = Color.FromArgb(255, 255, 192)
    End If

    If Len(theMessage) <= 30 Then
        howLong = 4000
    ElseIf Len(theMessage) >= 31 And Len(theMessage) <= 80 Then
        howLong = 7000
    ElseIf Len(theMessage) >= 81 And Len(theMessage) <= 100 Then
        howLong = 12000
    Else
        howLong = 17000
    End If

    Me.opacityTimer.Start()
End Sub

Private Sub opacityTimer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles opacityTimer.Tick
    If Me.loading Then
        Me.Opacity += 0.8

        If Me.Opacity >= 0.8 Then
            Me.opacityTimer.Stop()
            Me.opacityTimer.Dispose()
            Pause(howLong)
            Me.loading = False
            Me.opacityTimer.Start()
        End If
    Else
        Me.Opacity -= 0.08

        If Me.Opacity <= 0 Then
            Me.opacityTimer.Stop()
            Me.Close()
        End If
    End If
End Sub

Public Sub Pause(ByVal Milliseconds As Integer)
    Dim dTimer As Date

    dTimer = Now.AddMilliseconds(Milliseconds)

    Do While dTimer > Now
        Application.DoEvents()
    Loop
End Sub

Private Sub lblSaying_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lblSaying.Click
    Me.opacityTimer.Stop()
    Me.Close()
End Sub
End Class

现在它将在旧帖子下方显示最新帖子。我需要更改什么才能使其显示最新的顶部并在其他消息框出现时继续在列表中向下工作？

任何帮助都会很棒！

大卫

4

1 回答 1

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提醒一下，我相信 Growl for Windows 和 Snarl 都支持 GNTP。这意味着您可以简单地实现一个基于 GNTP VB 的库（或使用现有的库）并与它们交谈。:)

于 2012-03-15T22:02:21.747 回答