Question

要求：

必须支持MinWidth属性
只能在一行或两行显示文字。无法包装到3个或更多。
在尊重MinWidth时应使按钮尽可能小
文字只能在空格上包装
无法指定宽度。按钮应该保持水平增长。

这就是我希望按钮看起来的样子（请忽略造型，包装是重要部分）

enter image description here

我正在寻找有关如何动态文本换行的想法。

Answer 1

我尝试通过编辑Button的默认模板来实现此目的，主要是添加换行TextBlock而不是默认ContentPresenter，并在转换器中计算其Width。这种方法在转换器中需要相当多的数据，但是这样做可以更简单（更好）:)但它似乎仍在工作。由于默认模板中的ButtonChrome

，因此需要引用 PresentationFramework.Aero

只需像这样使用

<Button Style="{StaticResource WrappingButton}"
        MinWidth="100"
        Content="This button has some long text">
</Button>

enter image description here
在WrappingButtons

中包含3 StackPanel的屏幕截图示例

WrappingButton Style

<Style x:Key="WrappingButton" TargetType="{x:Type Button}"
       xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero">
    <Setter Property="HorizontalAlignment" Value="Left"/>
    <Setter Property="Width" Value="Auto"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <ControlTemplate.Resources>
                    <local:WrappingButtonWidthConverter x:Key="WrappingButtonWidthConverter"/>
                </ControlTemplate.Resources>
                <Microsoft_Windows_Themes:ButtonChrome x:Name="Chrome" BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}" RenderDefaulted="{TemplateBinding IsDefaulted}" SnapsToDevicePixels="true">
                    <TextBlock VerticalAlignment="Center"
                               FontSize="{TemplateBinding FontSize}"
                               FontFamily="{TemplateBinding FontFamily}"
                               FontStyle="{TemplateBinding FontStyle}"
                               FontWeight="{TemplateBinding FontWeight}"
                               FontStretch="{TemplateBinding FontStretch}"
                               LineStackingStrategy="BlockLineHeight"
                               TextWrapping="Wrap"
                               TextTrimming="WordEllipsis"
                               Text="{Binding RelativeSource={RelativeSource TemplatedParent},
                                              Path=Content}">
                        <TextBlock.Width>
                            <MultiBinding Converter="{StaticResource WrappingButtonWidthConverter}">
                                <Binding RelativeSource="{RelativeSource Self}" Path="Text"/>
                                <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="FontFamily"/>
                                <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="FontStyle"/>
                                <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="FontWeight"/>
                                <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="FontStretch"/>
                                <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="FontSize"/>
                                <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="MinWidth"/>
                            </MultiBinding>
                        </TextBlock.Width>
                    </TextBlock>
                </Microsoft_Windows_Themes:ButtonChrome>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsKeyboardFocused" Value="true">
                        <Setter Property="RenderDefaulted" TargetName="Chrome" Value="true"/>
                    </Trigger>
                    <Trigger Property="ToggleButton.IsChecked" Value="true">
                        <Setter Property="RenderPressed" TargetName="Chrome" Value="true"/>
                    </Trigger>
                    <Trigger Property="IsEnabled" Value="false">
                        <Setter Property="Foreground" Value="#ADADAD"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

<强> WrappingButtonWidthConverter

public class WrappingButtonWidthConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        string text = values[0].ToString();
        FontFamily fontFamily = values[1] as FontFamily;
        FontStyle fontStyle = (FontStyle)values[2];
        FontWeight fontWeight = (FontWeight)values[3];
        FontStretch fontStretch = (FontStretch)values[4];
        double fontSize = (double)values[5];
        double minWidth = (double)values[6];

        string[] words = text.Split(new char[] {' '});
        double widthSum = 0.0;
        List<double> wordWidths = GetWordWidths(words, fontFamily, fontStyle, fontWeight, fontStretch, fontSize, out widthSum);

        double width = 0.0;
        for (int i = 0; width < (widthSum / 2.0) && i < wordWidths.Count; i++)
        {
            width += wordWidths[i];
        }

        return minWidth > 0.0 ? Math.Max(minWidth, width) : width;
    }
    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }

    private List<double> GetWordWidths(string[] words,
                                       FontFamily fontFamily,
                                       FontStyle fontStyle,
                                       FontWeight fontWeight,
                                       FontStretch fontStretch,
                                       double fontSize,
                                       out double widthSum)
    {
        List<double> wordWidths = new List<double>();
        widthSum = 0.0;
        foreach (string word in words)
        {
            Typeface myTypeface = new Typeface(fontFamily, fontStyle, fontWeight, fontStretch);
            FormattedText ft = new FormattedText(word + " ",
                                                 CultureInfo.CurrentCulture,
                                                 FlowDirection.LeftToRight,
                                                 myTypeface,
                                                 fontSize,
                                                 Brushes.Black);
            wordWidths.Add(ft.WidthIncludingTrailingWhitespace);
            widthSum += ft.WidthIncludingTrailingWhitespace;
        }
        return wordWidths;
    }
}

Answer 2

由于您将文本限制为两行，我的建议是将自定义面板编写为按钮内容，将指定的文本，字体等转换为WPF FormattedText对象。然后，您可以测量它并决定在MeasureOverride和ArrangeOverride中如何布局和显示它。如果文本不适合，FormattedText甚至有一个显示...缩写的参数。要将它保持为两行，您需要先创建它，然后检查其高度以查看单行的高度。（需要在评论中添加休息，因为StackOverflow正在抛出错误）。

Answer 3

http://wpf.2000things.com/2011/07/11/339-wrapping-a-buttons-text-content-to-multiple-lines/

这让我完成了。还有这个：

 <Window.Resources>
        <local:Questions x:Key="theQs"/>
        <Style x:Key="WrappingButton" TargetType="{x:Type Button}">
            <Setter Property="FontSize" Value="10">

            </Setter>
        </Style>
    </Window.Resources>

和此：

<Button Name="btnDef4" Grid.Row="3" Style="{StaticResource WrappingButton}" >
                <TextBlock Text="{Binding ElementName=LVQuestions, Path=SelectedItem.TheDefs[3].Deftext}"
                TextWrapping="Wrap"/>
            </Button>

Answer 4

使用RichTextBox作为按钮的内容：

            RichTextBox rtb = new RichTextBox();
            rtb.IsReadOnly = true;
            rtb.Focusable = false;
            rtb.BorderThickness = new Thickness(0);
            rtb.Background = Brushes.Transparent;
            rtb.AppendText("This button has some long text.");
            myButton.Content = rtb;

如何在WPF中创建环绕按钮

4 个答案: