使用System.Drawing.Font
,有沒有辦法改變字母間距,就像你可以改變字體大小一樣?System.Drawing.Font - 更改字母間距?
我正在尋找增加字母間距以適應特定寬度。
如果這是不可能的,是否有其他方法可以獲得理想的效果?例如,是否有一個簡單的方法讓多個圖形適合我的特定寬度?
使用System.Drawing.Font
,有沒有辦法改變字母間距,就像你可以改變字體大小一樣?System.Drawing.Font - 更改字母間距?
我正在尋找增加字母間距以適應特定寬度。
如果這是不可能的,是否有其他方法可以獲得理想的效果?例如,是否有一個簡單的方法讓多個圖形適合我的特定寬度?
我不認爲的DrawString將允許您詳細,字符間距指定什麼,但我會創建一個計算基於所需的寬度間隔,然後繪製每個字符,以適應一個輔助功能。
試試這個,看你怎麼得到?
public void DrawSpacedText(Graphics g, Font font, Brush brush, PointF point, string text, int desiredWidth)
{
//Calculate spacing
float widthNeeded = 0;
foreach (char c in text)
{
widthNeeded += g.MeasureString(c.ToString(), font).Width;
}
float spacing = (desiredWidth - widthNeeded)/(text.Length - 1);
//draw text
float indent = 0;
foreach (char c in text)
{
g.DrawString(c.ToString(), font, brush, new PointF(point.X + indent, point.Y));
indent += g.MeasureString(c.ToString(), font).Width + spacing;
}
}
你也許可以優化此僅做一個調用每個字符MeasureString。甚至使用MeasureCharacterRanges獲取數組(我認爲更準確反正)
編輯:下面是一個使用MeasureCharacterRanges而不是一個例子...
public void DrawSpacedText(Graphics g, Font font, Brush brush, PointF point, string text, int desiredWidth)
{
//Calculate spacing
float widthNeeded = 0;
Region[] regions = g.MeasureCharacterRanges(text, font, new RectangleF(point, new SizeF(desiredWidth, font.Height + 10)), StringFormat.GenericDefault);
float[] widths = new float[regions.Length];
for(int i = 0; i < widths.Length; i++)
{
widths[i] = regions[i].GetBounds(g).Width;
widthNeeded += widths[i];
}
float spacing = (desiredWidth - widthNeeded)/(text.Length - 1);
//draw text
float indent = 0;
int index = 0;
foreach (char c in text)
{
g.DrawString(c.ToString(), font, brush, new PointF(point.X + indent, point.Y));
indent += widths[index] + spacing;
index++;
}
}
此代碼支持新線在文本並返回一個Image對象。
public static Image ConvertTextToImage(String text, Font font, Color textColor, int spacing = 0)
{
var textParts = SplitOnBreakLines(text);
// dummy image, just create drawing
var img = new Bitmap(1, 1);
var drawing = Graphics.FromImage(img);
// calculate width, height
var width = 0.0F;
foreach (char c in text)
{
width += drawing.MeasureString(c.ToString(), font).Width;
}
width = (width + spacing * (ClearBreakLines(text).Length - 1))/textParts.Length;
if (width <= 0)
width = 1;
var height = font.Height * textParts.Length;
// clear and create new objects
img.Dispose();
drawing.Dispose();
img = new Bitmap((int)width, (int)height);
drawing = Graphics.FromImage(img);
//Adjust for high quality
drawing.CompositingQuality = CompositingQuality.HighQuality;
drawing.InterpolationMode = InterpolationMode.HighQualityBilinear;
drawing.PixelOffsetMode = PixelOffsetMode.HighQuality;
drawing.SmoothingMode = SmoothingMode.HighQuality;
drawing.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
//paint the background
drawing.Clear(Color.Transparent);
//create a brush for the text
var textBrush = new SolidBrush(textColor);
//write text
var indent = 0.0F;
var point = new Point();
foreach (var textPart in textParts)
{
foreach (char c in textPart)
{
drawing.DrawString(c.ToString(), font, textBrush, new PointF(point.X + indent, point.Y));
indent += drawing.MeasureString(c.ToString(), font).Width + spacing;
}
indent = 0.0F;
point.Y += font.Height;
}
drawing.Save();
textBrush.Dispose();
drawing.Dispose();
return img;
}
public static string ClearBreakLines(string s)
{
return Regex.Replace(s, @"\r\n?|\n", string.Empty);
}
public static string[] SplitOnBreakLines(string s)
{
return Regex.Split(s, @"\r\n?|\n");
}
你在哪裏使用這個字體?什麼是利用它? – musefan
它用在GDI +圖像中,用'Graphics.DrawString()' – Curt
'System.Drawing'中沒有內置的機制來繪製調整後的字母間距的文本。你將不得不爲自己的代碼推出自己的代碼。首先查看'MeasureCharacterRanges'。 –