c# - Silverlight:字形宽度

设想

我想在WP7上使用Glyphs创建合理的文本行，即触摸周围矩形的左右边界。

我的解决方案

var glyphs = new Glyphs();
glyphs.FontUri = new Uri("/MyAssembly;component/MyPath/MyFont.ttf", UriKind.Relative);
glyphs.FontRenderingEmSize = 20;
glyphs.Fill = new SolidColorBrush(Colors.Red);

// measue width of space
glyphs.UnicodeString = " ";
glyphs.Measure(availableSize);
double spaceWidth = glyphs.DesiredSize.Width;
glyphs.InvalidateMeasure();

// setup justified text
string text = "Lorem Ipsum is dummy text of the printing and typesetting industry.";
int spaceCount = 10; // number of spaces in above text

glyphs.UnicodeString = text;
glyphs.Measure(availableSize); // now DesiredSize.Width = width of left aligned text

// I suspect my error to be in this formula:
double spaceAdvance = ((availableSize.Width - glyphs.DesiredSize.Width)
                       / spaceCount + spaceWidth) / glyphs.FontRenderingEmSize * 100;
string spaceAdvanceString = String.Format(",{0};", spaceAdvance);

var indices = new StringBuilder();
foreach (char c in text)
{
    if (c == ' ')   indices.Append(spaceAdvanceString);
    else            indices.Append(';');
}
glyphs.Indices = indices.ToString();

问题与疑问

字形的右侧未完全触及availableSize.Width -Border，但偏离了一些像素，当堆叠了几行文本时，这看起来很奇怪。

我的计算有什么问题？

最佳答案

替代方案:您可以使用支持“justify”的RichTextBox控件。

关于c# - Silverlight:字形宽度，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/5264537/