WPF文字描边的解决方法（二）——支持文字竖排和字符间距调整

原文:WPF文字描边的解决方法（二）——支持文字竖排和字符间距调整

自前天格式化文本效果出来后，今天又添加文本竖排和调整字符间距的功能。另外，由于上次仓促，没来得及做有些功能的设计时支持，这次也调整好了。

由于本人比较懒，没有重新做，文字竖排和字符间距主要是通过新建继承自StackPanel的FormatedText类逐字符添加StrokeableLabel做的，竖排是用的StackPanel.Orientation来设置的，字符间距主要用的StrokeableLabel.Margin。

对于StrokeableLabel只是添加了设计时支持，其他没有改变，如果对StrokeableLabel不了解请看http://blog.csdn.net/springberlin/article/details/45699625

FormatedText有如下新添属性：

StretchSize：字符间距

TextOrientation：文字排版

下面是效果图

XMAL配置：

<Window x:Class="StrokeableLabelTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:wpflib="clr-namespace:BLCTClassLibrary.WpfLib;assembly=BLCTClassLibrary.WpfLib"
        Title="MainWindow" Height="422" Width="579">
    <Grid ShowGridLines="True">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="auto" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <StackPanel Orientation="Vertical" >
            <Label Margin="10"  Content="以下是StrokeableLabel类（相对轻量级）"/>
            <wpflib:StrokeableLabel Text="测试文本" Fill="Yellow" Stroke="Black" StrokeThickness="0.3" FontWeight="Bold" FontSize="50"/>
            <wpflib:StrokeableLabel Text="测试文本" Fill="Yellow" Stroke="Red" StrokeThickness="0.7" FontWeight="DemiBold" FontSize="50">
                <wpflib:StrokeableLabel.Effect>
                    <DropShadowEffect Color="Black" BlurRadius="15" RenderingBias="Quality" Direction="290" ShadowDepth="5" Opacity="1"  />
                </wpflib:StrokeableLabel.Effect>
            </wpflib:StrokeableLabel>
            <wpflib:StrokeableLabel Text="测试文本" Fill="White" StrokeThickness="2" FontWeight="Bold" FontSize="50">
                <wpflib:StrokeableLabel.Stroke>
                    <LinearGradientBrush>
                        <LinearGradientBrush.GradientStops>
                            <GradientStop Color="Blue" Offset="0.2"/>
                            <GradientStop Color="Brown" Offset="0.3"/>
                            <GradientStop Color="PowderBlue" Offset="0.7"/>
                            <GradientStop Color="Red" Offset="1"/>
                        </LinearGradientBrush.GradientStops>
                    </LinearGradientBrush>
                </wpflib:StrokeableLabel.Stroke>
            </wpflib:StrokeableLabel>
            <wpflib:StrokeableLabel Text="测试文本" Stroke="red" StrokeThickness="2"  FontWeight="Bold" FontSize="50">
                <wpflib:StrokeableLabel.Fill>
                    <ImageBrush ImageSource="/StrokeableLabelTest;component/Images/20085385922474_2.jpg" />
                </wpflib:StrokeableLabel.Fill>
            </wpflib:StrokeableLabel>
            <wpflib:StrokeableLabel Fill="Transparent" FontSize="50" FontWeight="Light" StrokeThickness="8" Text="测试文本" >
                <wpflib:StrokeableLabel.Stroke>
                    <ImageBrush ImageSource="/StrokeableLabelTest;component/Images/05.jpg" />
                </wpflib:StrokeableLabel.Stroke>
            </wpflib:StrokeableLabel>
        </StackPanel>
        <StackPanel Grid.Column="1" Orientation="Vertical" >
            <TextBlock Margin="10"  Text="以下是FormatedText类（在StrokeableLabel的基础上可以使文字竖排，可以控制字符间距）" TextWrapping="WrapWithOverflow" />
            <wpflib:FormatedText StretchSize="-5" TextOrientation="Vertical" HorizontalAlignment="Center" Text="测试文本" Fill="Yellow" Stroke="Black" StrokeThickness="0.3" FontWeight="Bold" FontSize="50"/>
            <wpflib:FormatedText StretchSize="-10" HorizontalAlignment="Center" Text="测试文本" Fill="Yellow" Stroke="Black" StrokeThickness="0.3" FontWeight="Bold" FontSize="50"/>
            <wpflib:FormatedText StretchSize="20" HorizontalAlignment="Center" Text="测试文本" Fill="Yellow" Stroke="Black" StrokeThickness="0.3" FontWeight="Bold" FontSize="50">
                <wpflib:FormatedText.Effect>
                    <DropShadowEffect Color="Black" BlurRadius="15" RenderingBias="Quality" Direction="290" ShadowDepth="5" Opacity="1"  />
                </wpflib:FormatedText.Effect>
            </wpflib:FormatedText>
        </StackPanel>
    </Grid>
</Window>

库文件仅贴关键代码，其余请参考源码。库文件中利用StrokeableLabel进行排版以达到横/竖排和字符间距的效果：

        private void CreateText(string newStr)
        {
            this.Children.Clear();
            if (newStr == null)
                return;
            this.Orientation = TextOrientation;

            for (int i = 0; i < newStr.Length; i++)
            {
                if (i < newStr.Length - 1)
                    addChar(newStr[i], false);
                else
                    addChar(newStr[i], true);
            }
        }

        /// <summary>
        /// 添加一个字符
        /// </summary>
        /// <param name="c"></param>
        private void addChar(char c, bool ignore)
        {
            StrokeableLabel label = new StrokeableLabel();
            label.Text = c + "";
            label.Fill = this.Fill;
            label.Stroke = this.Stroke;
            label.StrokeThickness = this.StrokeThickness;
            label.FontSize = this.FontSize;
            label.FontFamily = this.FontFamily;
            label.FontStyle = this.FontStyle;
            label.FontWeight = this.FontWeight;
            label.FontStretch = this.FontStretch;
            if (!ignore)
                switch (Orientation)
                {
                    case System.Windows.Controls.Orientation.Horizontal:
                        label.Margin = new Thickness(0, 0, StretchSize, 0);
                        break;
                    case System.Windows.Controls.Orientation.Vertical:
                        label.Margin = new Thickness(0, 0, 0, StretchSize);
                        break;
                }
            label.VerticalAlignment = System.Windows.VerticalAlignment.Center;
            label.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
            this.Children.Add(label);
        }

源码：

http://download.csdn.net/detail/wblct/8708017