Question

在WPF应用程序中并使用Fluent功能区控件套件，我有一个DropDownButton，可以打开一个允许用户选择颜色的Gallery。

Exibit 1 http://i42.tinypic.com/iqhni8.jpg

以下是创建按钮的XAML：

<Fluent:DropDownButton x:Name="btnCommentColor" Header="Comments">
<Fluent:DropDownButton.Icon>
    <!-- What goes here? -->
</Fluent:DropDownButton.Icon>
<Fluent:Gallery x:Name="galCommentColor" ItemsSource="{Binding Source={StaticResource colorPropertiesOdp}}" SelectedValuePath="Name" MaxItemsInRow="12">
    <Fluent:Gallery.ItemTemplate>
        <DataTemplate>
            <Border BorderThickness="1" CornerRadius="2" BorderBrush="Black" Width="25" Height="25" VerticalAlignment="Stretch" Background="{Binding Name}" /> 
        </DataTemplate>
    </Fluent:Gallery.ItemTemplate>
</Fluent:Gallery>
</Fluent:DropDownButton>

图库的SelectedItem返回颜色的名称。我想让按钮的图标显示所选的实际颜色。这可以完全用XAML完成吗？我一直在尝试在网上找到各种各样的东西，但到目前为止，除了颜色名称之外，其他任何东西都无法显示在我想要颜色矩形的地方。寻找“什么在这里？”在上面的XAML中。

我感谢任何有用的建议。谢谢你的阅读！

更新：

我尝试了下面给出的答案但它仍然不起作用。我一定有错。这是此按钮的所有XAML代码的更新列表。看看Gallery本身的XAML以及SolidColorBrush的绑定，并告诉我你是否看到我做错了。

<Window.Resources>
    <ObjectDataProvider MethodName="GetType" 
     ObjectType="{x:Type sys:Type}" x:Key="colorsTypeOdp">
        <ObjectDataProvider.MethodParameters>
            <sys:String>System.Windows.Media.Colors, PresentationCore,  
             Version=3.0.0.0, Culture=neutral,  
             PublicKeyToken=31bf3856ad364e35</sys:String>
        </ObjectDataProvider.MethodParameters>
    </ObjectDataProvider>

    <ObjectDataProvider ObjectInstance="{StaticResource colorsTypeOdp}" 
     MethodName="GetProperties" x:Key="colorPropertiesOdp">
    </ObjectDataProvider>
</Window.Resources>

<Fluent:DropDownButton Name="btnCommentColor" Header="Comments">
    <Fluent:DropDownButton.LargeIcon>
        <Grid Width="32" Height="32">
            <Image Source="Icons\BlueLarge.png" />
            <Border Height="32" VerticalAlignment="Bottom" BorderThickness="0" CornerRadius="2">
                <Border.Background>
                    <SolidColorBrush Color="{Binding ElementName=galCommentColor, Path=SelectedValue, FallbackValue=Green}" />
                </Border.Background> 
            </Border>
        </Grid>
    </Fluent:DropDownButton.LargeIcon>
    <Fluent:Gallery Name="galCommentColor" ItemsSource="{Binding Source={StaticResource colorPropertiesOdp}}" SelectedValuePath="Name" MaxItemsInRow="12">
        <Fluent:Gallery.ItemTemplate>
            <DataTemplate>
                <Border ToolTip="{Binding Path=Name}" BorderThickness="1" CornerRadius="2" BorderBrush="Black" Width="25" Height="25" VerticalAlignment="Stretch" Background="{Binding Name}" /> 
            </DataTemplate>
        </Fluent:Gallery.ItemTemplate>
    </Fluent:Gallery>
</Fluent:DropDownButton>

Answer 1

在演练的第17页上，您将了解自己要实现的目标。

您可以在此处下载：http://fluent.codeplex.com/documentation

摘自演练：

enter image description here

<fluent1:Ribbon>
    <fluent1:Ribbon.Menu>
        <fluent1:Backstage />
    </fluent1:Ribbon.Menu>
    <fluent1:RibbonTabItem Header="Home">
        <fluent1:RibbonGroupBox Header="Clipboard">
            <!--  The following code shows standard mode for color gallery  -->
            <fluent1:DropDownButton Header="Standard">
                <!--  It's possible to create custom icon to present selected color  -->
                <fluent1:DropDownButton.Icon>
                    <Grid Width="16" Height="16">
                        <Image Source="Images\FontColor.png" />
                        <Border Height="4"
                                VerticalAlignment="Bottom"
                                BorderThickness="0">
                            <Border.Background>
                                <SolidColorBrush
                                    Color="{Binding ElementName=ColorGalleryStandard, Path=SelectedColor, FallbackValue=Black}" />
                            </Border.Background>
                        </Border>
                    </Grid>
                </fluent1:DropDownButton.Icon>
                <fluent1:ColorGallery x:Name="ColorGalleryStandard"
                                        IsNoColorButtonVisible="False"
                                        SelectedColor="Red" />
                <fluent1:MenuItem Header="A Menu Item" Icon="Images\Pink.png" />
            </fluent1:DropDownButton>
        </fluent1:RibbonGroupBox>
    </fluent1:RibbonTabItem>
</fluent1:Ribbon>

<强>更新

我发现你的代码没有任何问题，我已粘贴它并成功运行，这是从我的工作测试中再次粘贴的。

<Window x:Class="WpfApplication8.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:fluent1="clr-namespace:Fluent;assembly=Fluent"
        xmlns:system="clr-namespace:System;assembly=mscorlib"
        Title="MainWindow"
        Width="525"
        Height="350">
    <Window.Resources>
        <ObjectDataProvider x:Key="colorsTypeOdp"
                            MethodName="GetType"
                            ObjectType="{x:Type system:Type}">
            <ObjectDataProvider.MethodParameters>
                <system:String>
                    System.Windows.Media.Colors, PresentationCore,
                    Version=3.0.0.0, Culture=neutral,
                    PublicKeyToken=31bf3856ad364e35
                </system:String>
            </ObjectDataProvider.MethodParameters>
        </ObjectDataProvider>

        <ObjectDataProvider x:Key="colorPropertiesOdp"
                            MethodName="GetProperties"
                            ObjectInstance="{StaticResource colorsTypeOdp}" />
    </Window.Resources>
    <fluent1:DropDownButton Name="btnCommentColor" Header="Comments">
        <fluent1:DropDownButton.LargeIcon>
            <Grid Width="32" Height="32">
                <Image Source="Icons\BlueLarge.png" />
                <Border Height="32"
                        VerticalAlignment="Bottom"
                        BorderThickness="0"
                        CornerRadius="2">
                    <Border.Background>
                        <SolidColorBrush
                            Color="{Binding ElementName=galCommentColor, Path=SelectedValue, FallbackValue=Green}" />
                    </Border.Background>
                </Border>
            </Grid>
        </fluent1:DropDownButton.LargeIcon>
        <fluent1:Gallery Name="galCommentColor"
                         ItemsSource="{Binding Source={StaticResource colorPropertiesOdp}}"
                         MaxItemsInRow="12"
                         SelectedValuePath="Name">
            <fluent1:Gallery.ItemTemplate>
                <DataTemplate>
                    <Border Width="25"
                            Height="25"
                            VerticalAlignment="Stretch"
                            Background="{Binding Name}"
                            BorderBrush="Black"
                            BorderThickness="1"
                            CornerRadius="2"
                            ToolTip="{Binding Path=Name}" />
                </DataTemplate>
            </fluent1:Gallery.ItemTemplate>
        </fluent1:Gallery>
    </fluent1:DropDownButton>

</Window>

Answer 2

感谢Aybe确认这不是我。我确实通过在DropDownButton的LargeIcon属性上使用转换器来获得我想要的结果。

这是XAML：

<Fluent:DropDownButton Name="btnCommentColor" Header="Comments" HasTriangle="False" LargeIcon="{Binding ElementName=galCommentColor, Path=SelectedValue, Converter={StaticResource ColorNameToBorderConverter_Key}}">
    <Fluent:Gallery x:Name="galCommentColor" ItemsSource="{Binding Source={StaticResource colorPropertiesOdp}}" SelectedValuePath="Name" MaxItemsInRow="12" SelectedIndex="51">
        <Fluent:Gallery.ItemTemplate>
            <DataTemplate>
                <Border ToolTip="{Binding Name}" BorderThickness="1" CornerRadius="2" BorderBrush="Black" Width="25" Height="25" VerticalAlignment="Stretch" Background="{Binding Name}" /> 
            </DataTemplate>
        </Fluent:Gallery.ItemTemplate>
    </Fluent:Gallery>
</Fluent:DropDownButton>

代码：

Public Class ColorNameToBorderConverter
    Implements IValueConverter

    Public Function Convert(value As Object, targetType As Type, parameter As Object, culture As Globalization.CultureInfo) As Object Implements IValueConverter.Convert
        If ApplicationIsInDesignMode Then value = "Black"

        If TypeOf value Is String Then
            Return New Border With {
                .Height = 32,
                .BorderThickness = New Thickness(1),
                .BorderBrush = New SolidColorBrush(System.Windows.Media.Colors.Black),
                .CornerRadius = New CornerRadius(2, 2, 2, 2),
                .VerticalAlignment = VerticalAlignment.Bottom,
                .Background = New SolidColorBrush(ColorConverter.ConvertFromString(value))
            }
        Else
            Throw New InvalidOperationException("Unsupported type [" & value.GetType.ToString & "]")
        End If
    End Function

    Public Function ConvertBack(value As Object, targetType As Type, parameter As Object, culture As Globalization.CultureInfo) As Object Implements IValueConverter.ConvertBack
        Throw New NotImplementedException
    End Function

    Private Shared ReadOnly Property ApplicationIsInDesignMode() As Boolean
        Get
            Return CBool(DesignerProperties.IsInDesignModeProperty.GetMetadata(GetType(DependencyObject)).DefaultValue)
        End Get
    End Property
End Class

如何将按钮图标绑定到下拉列表中的选定项目？

2 个答案: