Question

我使用TextRenderer来测量字符串的长度，因此适当地调整控件的大小。在WPF中是否有等价物，或者我可以简单地使用TextRendered.MeasureString？

Answer 1

谢谢Gishu，

阅读你的链接我想出了以下两个为我做的工作：

    /// <summary>
    /// Get the required height and width of the specified text. Uses FortammedText
    /// </summary>
    public static Size MeasureTextSize(string text, FontFamily fontFamily, FontStyle fontStyle, FontWeight fontWeight, FontStretch fontStretch, double fontSize)
    {
        FormattedText ft = new FormattedText(text,
                                             CultureInfo.CurrentCulture,
                                             FlowDirection.LeftToRight,
                                             new Typeface(fontFamily, fontStyle, fontWeight, fontStretch),
                                             fontSize,
                                             Brushes.Black);
        return new Size(ft.Width, ft.Height);
    }

    /// <summary>
    /// Get the required height and width of the specified text. Uses Glyph's
    /// </summary>
    public static Size MeasureText(string text, FontFamily fontFamily, FontStyle fontStyle, FontWeight fontWeight, FontStretch fontStretch, double fontSize)
    {
        Typeface typeface = new Typeface(fontFamily, fontStyle, fontWeight, fontStretch);
        GlyphTypeface glyphTypeface;

        if(!typeface.TryGetGlyphTypeface(out glyphTypeface))
        {
            return MeasureTextSize(text, fontFamily, fontStyle, fontWeight, fontStretch, fontSize);
        }

        double totalWidth = 0;
        double height = 0;

        for (int n = 0; n < text.Length; n++)
        {
            ushort glyphIndex = glyphTypeface.CharacterToGlyphMap[text[n]];

            double width = glyphTypeface.AdvanceWidths[glyphIndex] * fontSize;

            double glyphHeight = glyphTypeface.AdvanceHeights[glyphIndex]*fontSize;

            if(glyphHeight > height)
            {
                height = glyphHeight;
            }

            totalWidth += width;
        }

        return new Size(totalWidth, height);
    }

Answer 2

查看FormattedText class

如果您需要更精细的控制，那么您需要下降到GlyphTypeface类型的AdvanceWidths成员。在这里找到similar discussion，其代码片段看起来可能有用。

更新：看起来这可能是Measuring text in WPF的重复.. OP请确认。

WPF相当于TextRenderer

2 个答案: