当文本长于标签大小时,调整标签的文本大小？

Question

我有一个显示文件名的标签..我必须设置AutoSize标签来False进行设计.
因此,当文件名文本比标签大小更长时......它会像图片一样被剪切.

label1.Size = new Size(200, 32);
label1.AutoSize = false;

当文本长于标签大小时,如何自动调整文本大小以适应标签大小？

Answer 1

您可以在下面使用我的代码段.系统需要一些循环来根据文本大小计算标签的字体.

while(label1.Width < System.Windows.Forms.TextRenderer.MeasureText(label1.Text, 
     new Font(label1.Font.FontFamily, label1.Font.Size, label1.Font.Style)).Width)
{
    label1.Font = new Font(label1.Font.FontFamily, label1.Font.Size - 0.5f, label1.Font.Style);
}

Answer 2

标签缩放

private void scaleFont(Label lab)
{
    Image fakeImage = new Bitmap(1, 1); //As we cannot use CreateGraphics() in a class library, so the fake image is used to load the Graphics.
    Graphics graphics = Graphics.FromImage(fakeImage);

    SizeF extent = graphics.MeasureString(lab.Text, lab.Font);

    float hRatio = lab.Height / extent.Height;
    float wRatio = lab.Width / extent.Width;
    float ratio = (hRatio < wRatio) ? hRatio : wRatio;

    float newSize = lab.Font.Size * ratio;

    lab.Font = new Font(lab.Font.FontFamily, newSize, lab.Font.Style);
}

Answer 3

根据@brgerner提供的文章,我将在这里提供替代实现,因为标记为答案的那个不如下面这样有效或完整:

public class FontWizard
{
    public static Font FlexFont(Graphics g, float minFontSize, float maxFontSize, Size layoutSize, string s, Font f, out SizeF extent)
    {
        if (maxFontSize == minFontSize)
            f = new Font(f.FontFamily, minFontSize, f.Style);

        extent = g.MeasureString(s, f);

        if (maxFontSize <= minFontSize)
            return f;

        float hRatio = layoutSize.Height / extent.Height;
        float wRatio = layoutSize.Width / extent.Width;
        float ratio = (hRatio < wRatio) ? hRatio : wRatio;

        float newSize = f.Size * ratio;

        if (newSize < minFontSize)
            newSize = minFontSize;
        else if (newSize > maxFontSize)
            newSize = maxFontSize;

        f = new Font(f.FontFamily, newSize, f.Style);
        extent = g.MeasureString(s, f);

        return f;
    }

    public static void OnPaint(object sender, PaintEventArgs e, string text)
    {
        var control = sender as Control;
        if (control == null)
            return;

        control.Text = string.Empty;    //delete old stuff
        var rectangle = control.ClientRectangle;

        using (Font f = new System.Drawing.Font("Microsoft Sans Serif", 20.25f, FontStyle.Bold))
        {
            SizeF size;
            using (Font f2 = FontWizard.FlexFont(e.Graphics, 5, 50, rectangle.Size, text, f, out size))
            {
                PointF p = new PointF((rectangle.Width - size.Width) / 2, (rectangle.Height - size.Height) / 2);
                e.Graphics.DrawString(text, f2, Brushes.Black, p);
            }
        }
    }
}

和用法:

val label = new Label();
label.Paint += (sender, e) => FontWizard.OnPaint(sender, e, text);