CoverFlow 在 WPF 中如何包含？

Question

我知道还有其他关于 WPF 中的 CoverFlow 效果的问题。我最喜欢的是Is there a good iTunes coverflow-type control for WPF?。

我下载了“第 7 部分”，它在 WPF 和 C# 中。

现在，我几乎从不使用第三方库，尤其是 GUI 库，而且我不知道如何在我的项目中使用该模板..

那么，基本上，我怎样才能将它正确地包含在我的项目中？在References中取了图书馆后我该怎么办？

如果您知道更好的 CoverFlow 模板（并且免费），您能告诉我哪个吗？

请帮忙（小提示，我的项目在 VB.NET 中，但我认为在 .dll 中没有任何关系）

Answer 1

您正在使用的示例CoverFlow 组件不能完全用作独立控件。有一个名为ThumbnailManager 的接口需要实现。我首先右键单击工具箱并选择选择项目，然后导航到包含Coverflow 组件Ded.Tutorial.Wpf.CoverFlow.Part7.FlowComponent.dll 的 .dll 文件并选择它，然后我能够删除它，我能够让它在 VB 中工作FlowControl 从工具箱进入我的主窗口。然后我将作者用来创建ThumbnailManager 的C# 代码转换为VB。

ThumbnailManager.vb

Imports System.IO.IsolatedStorage
Imports System.IO
Imports System.Drawing
Imports System.Drawing.Imaging
Imports Ded.Tutorial.Wpf.CoverFlow.Part7.FlowComponent
Imports Ded.Tutorial.Wpf.CoverFlow.Part7.FlowComponent.FlowControl

Namespace Ded.Tutorial.Wpf.CoverFlow.Part7.FlowComponent
    Public Class ThumbnailManager : Implements IThumbnailManager
        Private ReadOnly store As IsolatedStorageFile

        Private Shared Function AmazonCut(myImage As Image) As Image
            If (myImage.Width <> myImage.Height) Then
                Return myImage
            End If
            Dim bmp As Bitmap = New Bitmap(myImage)
            Dim size As Integer = myImage.Height
            Dim white As Integer = System.Drawing.Color.FromKnownColor(KnownColor.White).ToArgb()
            Dim i As Integer = 0
            While (i < size / 2)
                If (Not bmp.GetPixel(i, i).ToArgb().Equals(white)) Then Exit While
                If (Not bmp.GetPixel(i, size - 1 - i).ToArgb().Equals(white)) Then Exit While
                If (Not bmp.GetPixel(size - 1 - i, i).ToArgb().Equals(white)) Then Exit While
                If (Not bmp.GetPixel(size - 1 - i, size - 1 - i).ToArgb().Equals(white)) Then Exit While
                i += 1
            End While
            If (i > 0) Then
                i += 8
                Dim zone As Rectangle = New Rectangle(i, i, size - 2 * 1, size - 2 * i)
                Return bmp.Clone(zone, System.Drawing.Imaging.PixelFormat.DontCare)
            End If
            Return bmp
        End Function

        Private Function GetThumbnail(path As String) As Byte()
            Dim source As Image = Image.FromFile(path)
            source = AmazonCut(source)
            Dim height As Integer = source.Height
            Dim width As Integer = source.Width
            Dim factor As Integer = (height - 1) \ 250 + 1
            Dim smallHeight As Integer = height \ factor
            Dim smallWidth As Integer = width \ factor
            Dim thumb As Image = source.GetThumbnailImage(smallWidth, smallHeight, Nothing, IntPtr.Zero)
            Using ms As New MemoryStream
                thumb.Save(ms, ImageFormat.Png)
                ms.Flush()
                ms.Seek(0, SeekOrigin.Begin)
                Dim result(CInt(ms.Length)) As Byte
                ms.Read(result, 0, CInt(ms.Length))
                Return result
            End Using

        End Function

        Public Sub New()
            store = IsolatedStorageFile.GetUserStoreForAssembly
        End Sub

        Public Function GetThumbnail(host As String, filepath As String) As System.Windows.Media.ImageSource Implements IThumbnailManager.GetThumbnail
            Dim thumbName As String = Path.GetFileName(filepath)
            If (store.GetFileNames(thumbName).Length = 0) Then
                Using Stream As New IsolatedStorageFileStream(thumbName, FileMode.CreateNew, store)
                    Dim data() As Byte = GetThumbnail(filepath)
                    Stream.Write(data, 0, data.Length)
                End Using
            End If
            Using Stream As New IsolatedStorageFileStream(thumbName, FileMode.Open, store)
                Dim myImage As BitmapImage = New BitmapImage()
                myImage.BeginInit()
                myImage.CacheOption = BitmapCacheOption.OnLoad
                myImage.StreamSource = Stream
                myImage.EndInit()
                myImage.Freeze()
                Return myImage
            End Using
        End Function
    End Class
End Namespace

然后，我在 MainWindow.xaml.vb 中添加了一个附加类和他正在使用的加载方法。在组件工作之后，我还必须将 MainWindow.g.vb 中的 Ded.Tutorial.Wpf.CoverFlow.Part7.FlowComponent.FlowControl 更改为 Global.Ded.Tutorial.Wpf.CoverFlow.Part7.FlowComponent.FlowControl。

MainWindow.xaml.vb

Imports System.IO
Imports System.Drawing.Imaging
Imports WpfApplication1.Ded.Tutorial.Wpf.CoverFlow.Part7


Class MainWindow

    Public Sub New()

        ' This call is required by the designer.
        InitializeComponent()

        FlowControl1.Cache = New FlowComponent.ThumbnailManager
        Load("C:\Users\Marks-6520\Pictures\Alaska Trip")
        slider.Minimum = 0
        slider.Maximum = FlowControl1.Count - 1
    End Sub

    Public Sub Load(imagePath As String)
        Dim imageDir As DirectoryInfo = New DirectoryInfo(imagePath)
        Dim images As List(Of FileInfo) = New List(Of FileInfo)(imageDir.GetFiles("*.jpg"))
        images.Sort(New FileInfoComparer)
        For Each f As FileInfo In images
            FlowControl1.Add(Environment.MachineName, f.FullName)
        Next
    End Sub


    Private Sub slider_ValueChanged(sender As System.Object, e As System.Windows.RoutedPropertyChangedEventArgs(Of System.Double))

        FlowControl1.Index = Convert.ToInt32(slider.Value)

    End Sub
End Class

Public Class FileInfoComparer : Implements IComparer(Of FileInfo)

    Public Function Compare(x As System.IO.FileInfo, y As System.IO.FileInfo) As Integer Implements System.Collections.Generic.IComparer(Of System.IO.FileInfo).Compare
        Return String.Compare(x.FullName, y.FullName)
    End Function
End Class