Develop Reference

Circle Cut Off in PictureBox C#

i created a function which is drawing a circle with a letter inside.
i write it into a stream and set it to picture box in Zoom Mode.
It looks nice but some pieces of the circle are cut off.
Here is the Code for the Circle:
public MemoryStream GenerateCircle(string name)
{
var avatarString = string.Format("{0}", name[0]).ToUpper();
var bgColour = ColorTranslator.FromHtml("#007FBC");
var bmp = new Bitmap(70, 70);
var sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
var font = new Font("Arial", 34, FontStyle.Bold, GraphicsUnit.Pixel);
var graphics = Graphics.FromImage(bmp);
graphics.Clear(Color.White);
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
Rectangle rect = new Rectangle(0, 0, 70, 70);
Brush b = new SolidBrush(bgColour);
Pen pen = new Pen(bgColour);
graphics.DrawEllipse(pen, rect);
graphics.FillEllipse(b, rect);
graphics.DrawString(avatarString, font, new SolidBrush(Color.WhiteSmoke), 35, 35, sf);
graphics.Flush();
var ms = new MemoryStream();
bmp.Save(ms, ImageFormat.Png);
return ms;
}
i set it like that:
avatarpicturebox.Image = Image.FromStream(GenerateCircle("Test"));
That is what it looks like:
Circle Cuts Off
Can someone help here please?

Just reduce the circle's width and height 1 pixel each to avoid clipping the right and bottom sides due to the pixels offset. Use Rectangle.Inflate method and pass negative width and height values to shrink the destination rectangle to fit.
Modifying your function to return a Bitmap instead of MemoryStream.
public Bitmap GenerateCircle(string name)
{
var bgColour = ColorTranslator.FromHtml("#007FBC");
var bmp = new Bitmap(70, 70, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (var graphics = Graphics.FromImage(bmp))
using (var sf = new StringFormat())
using (var font = new Font("Arial", 34, FontStyle.Bold, GraphicsUnit.Pixel))
using (var b = new SolidBrush(bgColour))
using (var pen = new Pen(bgColour))
{
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
graphics.Clear(Color.White);
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
graphics.PixelOffsetMode = PixelOffsetMode.Half;
Rectangle rect = new Rectangle(Point.Empty, bmp.Size);
rect.Inflate(-2, -2);
graphics.DrawEllipse(pen, rect);
graphics.FillEllipse(b, rect);
graphics.DrawString(name.ToUpper(), font, Brushes.WhiteSmoke, rect, sf);
}
return bmp;
}
And the caller:
private void SomeButton_Click(object sender, EventArgs e)
{
avatarpicturebox.Image?.Dispose();
avatarpicturebox.Image = GenerateCircle("T");
}
Side Notes
Always dispose of the graphics objects you create either by calling explicitly the .Dispose method or by creating them with using keyword.
Use the Graphics.DrawString overloads that take a Rectangle and StringFormat params to draw the strings. Use the later to dictate how and where the string should be drawn in the given Rectangle. See also StringFormatFlags enum.

In C#.net, how to get text in middle of line while printing?

I created a project in C# windows form application. I am using visual studio 2010, and .net framework version 4.0.
My project has print button.
I wrote code for print button:
private void btn_Print_Click(object sender, EventArgs e)
{
PrintDialog pd = new PrintDialog();
PrintDocument pdoc = new PrintDocument();
PrinterSettings ps = new PrinterSettings();
PaperSize psize = new PaperSize("Custom", 100, 200);
pd.Document = pdoc;
pd.Document.DefaultPageSettings.PaperSize = psize;
pdoc.DefaultPageSettings.PaperSize.Height = 820;
pdoc.DefaultPageSettings.PaperSize.Width = 520;
pdoc.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);
DialogResult result = pd.ShowDialog();
if (result == DialogResult.OK)
{
PrintPreviewDialog pp = new PrintPreviewDialog();
pp.Document = pdoc;
result = pp.ShowDialog();
if (result == DialogResult.OK)
{
pdoc.Print();
}
}
}
And event hadler code for printDocument1 control
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
string s1 = "1st line text";
string s2 = "2nd line text";
string s3 = "3rd line text";
Font f1 = new Font("Arial", 10, FontStyle.Bold, GraphicsUnit.Pixel);
Font f2 = new Font("Arial", 10, FontStyle.Regular, GraphicsUnit.Pixel);
Font f3 = new Font("Arial", 10, FontStyle.Regular, GraphicsUnit.Pixel);
e.Graphics.DrawString(s1, f1, Brushes.Black, new Point(260, 10));
e.Graphics.DrawString(s2, f2, Brushes.Black, new Point(260, 20));
e.Graphics.DrawString(s3, f3, Brushes.Black, new Point(260, 30));
}
I need string s1,s2,s3 in middle of line. From above code I am getting that string's 1st character starting from middle point of line. But I need whole string in middle of line. I tried all solutions given on net. But not yet got result. Please help me to find out, what I am missing. Thanks for your time.

e.Graphics.DrawString(s1, f1, Brushes.Black, new RectangleF(0, 10, e.PageBounds.Width, 30), new StringFormat() { Alignment = StringAlignment.Center });
instead of point, set the actual rectangle of the area what you need to print and set the alignment
in your statement the code has to be
string s1 = "1st line text";
string s2 = "2nd line text";
string s3 = "3rd line text";
Font f1 = new Font("Arial", 10, FontStyle.Bold, GraphicsUnit.Pixel);
Font f2 = new Font("Arial", 10, FontStyle.Regular, GraphicsUnit.Pixel);
Font f3 = new Font("Arial", 10, FontStyle.Regular, GraphicsUnit.Pixel);
e.Graphics.DrawString(s1, f1, Brushes.Black, new RectangleF(0, 10, e.PageBounds.Width, 10), new StringFormat() { Alignment = StringAlignment.Center });
e.Graphics.DrawString(s2, f2, Brushes.Black, new RectangleF(0, 20, e.PageBounds.Width, 10), new StringFormat() { Alignment = StringAlignment.Center });
e.Graphics.DrawString(s3, f3, Brushes.Black, new RectangleF(0, 30, e.PageBounds.Width, 10), new StringFormat() { Alignment = StringAlignment.Center });

How to draw underline for string which contains only space using DrawString?

I have faced underline missing issue with if I only draw text (only spaces) with underline style. Please refer the below tried code at my end and let me know the solution to resolve this.
Bitmap bitmap = new Bitmap(400, 200);
Graphics graphics = Graphics.FromImage(bitmap);
Brush brush = new SolidBrush(Color.White);
graphics.FillRectangle(brush, 0, 0, 400, 200);
System.Drawing.Font font = new System.Drawing.Font("Arial", 12, FontStyle.Underline);
brush = new SolidBrush(Color.Black);
StringFormat stringformat = new StringFormat(StringFormat.GenericTypographic);
stringformat.FormatFlags |= StringFormatFlags.MeasureTrailingSpaces;
string text = "Hello";
SizeF sizeF = m_graphics.MeasureString(text, font, new PointF(0, 0), stringformat);
graphics.DrawString(text, font, brush, new RectangleF(0, 0, sizeF.Width, sizeF.Height), stringformat);
text = " ";
float width = sizeF.Width;
sizeF = m_graphics.MeasureString(text, font, new PointF(0, 0), stringformat);
graphics.DrawString(text, font, brush, new RectangleF(width, 0, sizeF.Width, sizeF.Height), stringformat);
text = "World";
width += sizeF.Width;
sizeF = m_graphics.MeasureString(text, font, new PointF(0, 0), stringformat);
graphics.DrawString(text, font, brush, new RectangleF(width, 0, sizeF.Width, sizeF.Height), stringformat);

As far as I can see you have three options:
Use a monospaced font (Courier New and Lucida Sans Typewriter). More info on the monospaced fonts here and here.
System.Drawing.Font font =
new System.Drawing.Font("Courier New", 12, FontStyle.Underline);
Write the text at once. If you only write the spaces then the method won't work, even if you use TextRenderer to draw the string. So if you receive the strings separately then I suggest add them in a StringBuilder and draw the whole text or sentence.
var sb = new StringBuilder();
sb.Append("Hello");
sb.Append(" ");
sb.Append("World!");
var bitmap = new Bitmap(400, 200);
var graphics = Graphics.FromImage(bitmap);
Brush brush = new SolidBrush(Color.White);
graphics.FillRectangle(brush, 0, 0, 400, 200);
var font = new Font("Arial", 12, FontStyle.Underline);
brush = new SolidBrush(Color.Black);
var stringformat = new StringFormat(StringFormat.GenericTypographic);
stringformat.FormatFlags = StringFormatFlags.MeasureTrailingSpaces;
stringformat.Trimming = StringTrimming.None;
var text = sb.ToString();
var sizeF = graphics.MeasureString(text, font, new PointF(0, 0), stringformat);
graphics.DrawString(text, font, brush,
new RectangleF(5, 0, sizeF.Width, sizeF.Height), stringformat);
The hack version: You can draw an invisible character such as (char)127 which is the delete character, like this (you can use the code from point 2 and add this line when initializing the StringBuilder):
sb.Append(new string ((char)127, 5)); //this will create approx. five spaces.
You can use other invisible characters if you need.
The 3rd options is a hack and should be considered as such, I would recommend option 1 if you can change the font otherwise option 2.

Drawstring overlapping each other? [duplicate]

This question already has answers here:
How to set line spacing Graphics.DrawString
(2 answers)
Closed 6 years ago.
CodeA:
Image imageChipsetName = new System.Drawing.Bitmap(photoWidth, photoHeight);
StringFormat strFormat = new StringFormat();
strFormat.Alignment = StringAlignment.Center;
strFormat.LineAlignment = StringAlignment.Center;
Graphics graphics = Graphics.FromImage(imageChipsetName);
graphics.DrawString(stringA + "\n",
new Font("Tahoma", 14, FontStyle.Underline), Brushes.Black,
new RectangleF(0, 0, photoWidth, photoHeight), strFormat);
graphics.DrawString( stringB,
new Font("Tahoma", 14), Brushes.Black,
new RectangleF(0, 0, photoWidth, photoHeight), strFormat);
CodeB:
Image imageChipsetName = new System.Drawing.Bitmap(photoWidth, photoHeight);
StringFormat strFormat = new StringFormat();
strFormat.Alignment = StringAlignment.Center;
strFormat.LineAlignment = StringAlignment.Center;
Graphics graphics = Graphics.FromImage(imageChipsetName);
graphics.DrawString(stringA + "\n"+stringB,
new Font("Tahoma", 14, FontStyle.Underline), Brushes.Black,
new RectangleF(0, 0, photoWidth, photoHeight), strFormat);
I need to draw 2 string within a box. StringA with underline style while StringB don't.
CodeB almost achieve what I want but stringA and stringB sharing the same style. So I tested with CodeA but the program with it is that both string overlapping each other. May I know

The problem with codeA is that both stringA and stringB are drawn at the exact same position.
graphics.DrawString turns string into image and print it on the paper.
"\n" doesn't have any meaning once the string is turned into image. It will not be printed nor will it create a new line. In fact, there is no "lines" on the paper. Just image.
You need to give stringB different position. Use Graphics.MeasureString (String, Font) to measure the size of stringA, then adjust stringB's position according to the result.
Image imageChipsetName = new System.Drawing.Bitmap(photoWidth, photoHeight);
StringFormat strFormat = new StringFormat();
strFormat.Alignment = StringAlignment.Center;
strFormat.LineAlignment = StringAlignment.Center;
Font strFontA = new Font("Tahoma", 14, FontStyle.Underline);//Font used by stringA
Graphics graphics = Graphics.FromImage(imageChipsetName);
graphics.DrawString(stringA + "\n",
strFont_A, Brushes.Black,
new RectangleF(0, 0, photoWidth, photoHeight), strFormat);
SizeF stringSizeA = new SizeF();
stringSizeA = Graphics.MeasureString(stringA, strFont_A);//Measuring the size of stringA
graphics.DrawString(stringB,
new Font("Tahoma", 14), Brushes.Black,
new RectangleF(0, stringSizeA.Height, photoWidth, photoHeight - stringSizeA.Height), strFormat);

How to use custom fonts in emgucv?

I know how to draw text on image in Emgu CV:
CvFont f = new MCvFont(Emgu.CV.CvEnum.FONT.CV_FONT_HERSHEY_COMPLEX_SMALL, 1, 1);
image.Draw("something", ref f, new Point(0, 0), new Rgb(0, 0, 0));
but I don't know how to use other fonts instead of CV_FONT_HARSHEY*
UPDATE:
This is complete solution:
var b = image.Bitmap;
Graphics g = Graphics.FromImage(b);
Font drawFont = new Font("Arial", 16);
SolidBrush drawBrush = new SolidBrush(Color.Black);
PointF drawPoint = new PointF(0,0);
g.DrawString("something,", drawFont, drawBrush, drawPoint);
/// after drawing etc.
image.Bitmap = b;

You can add TTF file in PrivateFontCollection
// 'PrivateFontCollection' is in the 'System.Drawing.Text' namespace
var foo = new PrivateFontCollection();
// Provide the path to the font on the filesystem
foo.AddFontFile("...");
var myCustomFont = new Font((FontFamily)foo.Families[0], 36f);
And then you draw image like this:
image.Draw("something", myCustomFont, new Point(0, 0), new Rgb(0, 0, 0));
Or you can use method from myCustomFont: Graphics.DrawString

// this solution draws test over a Mat image
{
var b = myMat.ToBitmap();
Graphics g = Graphics.FromImage(b);
Font drawMFont = new Font("Calibri", 8, FontStyle.Bold);
SolidBrush drawMBrush = new SolidBrush(Color.DarkCyan);
PointF drawMPoint = new PointF(1, 4);
g.DrawString("Hello",drawMFont,drawMBrush, drawMPoint);
}