The string is "Hello World " with 10 SPACE chars in the end, but Graphics.DrawString in Right Alignment omits all of SPACE chars, it just draws "Hello World" only.
protected override void OnPaint(PaintEventArgs e)
{
Rectangle rct = new Rectangle(20, 100, 200, 20);
e.Graphics.DrawRectangle(new Pen(Color.Lime), rct);
e.Graphics.DrawString("Hello World ", Font, new SolidBrush(SystemColors.ControlText), rct, new StringFormat() { Alignment = StringAlignment.Far});
base.OnPaint(e);
}
To include the Trailing Spaces when drawing strings with Gdi+ Graphics.DrawString method, pass a StringFormat to a proper overload and add or append (|=) the StringFormatFlags.MeasureTrailingSpaces value to the StringFormat.FormatFlags property.
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Rectangle rct = new Rectangle(20, 100, 200, 20);
string s = "Hello World ";
using (var sf = new StringFormat(StringFormat.GenericTypographic))
{
sf.Alignment = StringAlignment.Far;
sf.LineAlignment = StringAlignment.Center;
sf.FormatFlags = StringFormatFlags.MeasureTrailingSpaces;
e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
e.Graphics.DrawString(s, Font, SystemBrushes.ControlText, rct, sf);
}
e.Graphics.DrawRectangle(Pens.Lime, rct);
}
Consider using the Gdi TextRenderer class to draw strings over controls unless you encounter problems like drawing on transparent backgrounds.
The previous code could have been written like:
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Rectangle rct = new Rectangle(20, 100, 200, 20);
string s = "Hello World ";
TextRenderer.DrawText(e.Graphics, s, Font, rct, SystemColors.ControlText,
TextFormatFlags.Right |
TextFormatFlags.VerticalCenter);
e.Graphics.DrawRectangle(Pens.Lime, rct);
}
Related
I want to save a given text as an image. The image should have a fixed width (200px in my example). Around the text there should be no spacing, padding or whatever. Regardless what text is entered, the width should not change, only the height of the text. This works. However, there is still white padding around the text and the text is truncated on the right side.
I have already tried to change StringFormat.GenericTypographic and also tried without AntiAlias, but I do not get it to work. Can anyone help me to get this working?
private void button1_Click(object sender, EventArgs e)
{
Font font = new Font("Arial", 1000, FontStyle.Regular);
Image i = DrawText("TEST MY STRING", font, Color.Red, Color.White);
i.Save("test.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
}
private Image DrawText(String text, Font font, Color textColor, Color backColor)
{
Image img = new Bitmap(1, 1);
Graphics drawing = Graphics.FromImage(img);
drawing.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
SizeF sz = drawing.MeasureString(text, font, 0, StringFormat.GenericTypographic);
img.Dispose();
drawing.Dispose();
/* Set maximum width of string. */
int textWidth = 200;
float sf = textWidth / sz.Width;
int textHeight = (int)(sz.Height * sf);
img = new Bitmap(textWidth, textHeight);
drawing = Graphics.FromImage(img);
drawing.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
drawing.Clear(backColor);
drawing.ScaleTransform(sf, sf);
drawing.DrawString(text, font, Brushes.Black, 0, 0, new StringFormat(StringFormatFlags.NoWrap | StringFormatFlags.NoClip));
drawing.Save();
drawing.Dispose();
return img;
}
In a WinForms app, I am trying to measure the size of some text I want to draw with no padding. Here's the closest I've gotten...
protected override void OnPaint(PaintEventArgs e) {
DrawIt(e.Graphics);
}
private void DrawIt(Graphics graphics) {
var text = "123";
var font = new Font("Arial", 32);
var proposedSize = new Size(int.MaxValue, int.MaxValue);
var measuredSize = TextRenderer.MeasureText(graphics, text, font, proposedSize, TextFormatFlags.NoPadding);
var rect = new Rectangle(100, 100, measuredSize.Width, measuredSize.Height);
graphics.DrawRectangle(Pens.Blue, rect);
TextRenderer.DrawText(graphics, text, font, rect, Color.Black, TextFormatFlags.NoPadding);
}
... but as you can see from the results ...
... there is still a considerable amount of padding, particularly on the top and bottom. Is there any way to measure the actual bounds of the drawn characters (with something really awful like printing to an image and then looking for painted pixels)?
Thanks in advance.
(I've marked this answer as "the" answer just so people know it was answered, but #TaW actually provided the solution -- see his link above.)
#TaW - That was the trick. I'm still struggling to get the text to go where I want it to, but I'm over the hump. Here's the code I ended out with...
protected override void OnPaint(PaintEventArgs e) {
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
DrawIt(e.Graphics);
}
private void DrawIt(Graphics graphics) {
var text = "123";
var font = new Font("Arial", 40);
// Build a path containing the text in the desired font, and get its bounds.
GraphicsPath path = new GraphicsPath();
path.AddString(text, font.FontFamily, (int)font.Style, font.SizeInPoints, new Point(0, 0), StringFormat.GenericDefault);
var bounds = path.GetBounds();
// Move it where I want it.
var xlate = new Matrix();
xlate.Translate(100, 100);
path.Transform(xlate);
// Draw the path (and a bounding rectangle).
graphics.DrawPath(Pens.Black, path);
bounds = path.GetBounds();
graphics.DrawRectangle(Pens.Blue, bounds.Left, bounds.Top, bounds.Width, bounds.Height);
}
... and here is the result (notice the nice, tight bounding box) ...
Have you tried
Graphics.MeasureString("myString", myFont, int.MaxValue, StringFormat.GenericTypographic)
I'm using the following to print out some text from my C# WPF app:
private void Button_Click(object sender, RoutedEventArgs e)
{
PrintDocument printDocument = new PrintDocument();
printDocument.PrinterSettings.PrinterName = "\\\\servername\\printername";
printDocument.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
if (printDocument.PrinterSettings.IsValid)
{
printDocument.Print();
}
}
// The PrintPage event is raised for each page to be printed.
private void pd_PrintPage(object sender, PrintPageEventArgs ev)
{
string stringToPrint = "SOME TEXT TO PRINT";
// Create font and brush.
Font drawFont = new Font("Arial", 16);
SolidBrush drawBrush = new SolidBrush(System.Drawing.Color.Black);
System.Drawing.Point pos = new System.Drawing.Point(100, 100);
ev.Graphics.DrawString(stringToPrint, drawFont, drawBrush, pos);
ev.HasMorePages = false;
}
The above example is using a fixed position but I need to print out several lines of text all different lengths and I want to centre them all on the page (The x position).
How can I do this?
There is an overload of Graphics.DrawString that uses a StringFormat parameter that you can use to set the horizontal and vertical alignment of the text in the rectangle. I have used something like this in the past.
string stringToPrint = "SOME TEXT TO PRINT";
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
// Create font and brush.
Font drawFont = new Font("Arial", 16);
SolidBrush drawBrush = new SolidBrush(System.Drawing.Color.Black);
//Starting point of left margin,Width of page, Height of Text
System.Drawing.RectangleF rect = new System.Drawing.RectangleF(0, 100, 100, 50);
ev.Graphics.DrawString(stringToPrint, drawFont, drawBrush, rect, sf);
ev.HasMorePages = false;
I'm trying to draw text, which contains symbols from "Combining Diacritical Marcs" unicode subrange (U+0300 - U+FE23). For example i tried to draw string "T̅", wich contains of two characters: 'T' and '\u0305'.
I've got that:
Is there any way to get correct text?
Addition: I need to draw rotated text too.
PS: my code:
private void Form1_Paint(object sender, PaintEventArgs e) {
Graphics g = e.Graphics;
Font fontTahoma = new Font("Tahoma", 16);
Font fontTimesNewRom = new Font("Times New Romulan", 16);
Font fontArial = new Font("Arial", 16);
Brush brush = new SolidBrush(Color.Red);
g.DrawString("Test1 T̅ T\u0305", fontTahoma, brush, new PointF(20, 20));
g.DrawString("Test1 T̅ T\u0305", fontTimesNewRom, brush, new PointF(20, 40));
g.DrawString("Test1 T̅ N\u0305", fontArial, brush, new PointF(20, 60));
}
TextRenderer seems to draw it better:
TextRenderer.DrawText(g, "Test1 T̅ T\u0305", fontTahoma,
new Point(120, 20), Color.Black);
I have overridden the OnPaint method of my Label control in VS2008:
void Label_OnPaint(object sender, PaintEventArgs e) {
base.OnPaint(e);
dim lbl = sender as Label;
if (lbl != null) {
string Text = lbl.Text;
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
if (myShowShadow) { // draw the shadow first!
e.Graphics.DrawString(Text, lbl.Font, new SolidBrush(myShadowColor), myShadowOffset, StringFormat.GenericDefault);
}
e.Graphics.DrawString(Text, lbl.Font, new SolidBrush(lbl.ForeColor), 0, 0, StringFormat.GenericDefault);
}
}
This works, but I really want to find out how to center the text both vertically and horizontally. I've heard of the MeasureString() method, but my "Text" complicates matters because it could include page breaks.
Could someone guide me with how to do this?
Alternatively you can create your own StringFormat object and pass it in using an overload of DrawString that supports a RectangleF:
StringFormat formatter = new StringFormat();
formatter.LineAlignment = StringAlignment.Center;
formatter.Alignment = StringAlignment.Center;
RectangleF rectangle = new RectangleF(0, 0, lbl.Width, lbl.Height);
e.Graphics.DrawString(Text, lbl.Font, new SolidBrush(lbl.ForeColor), rectangle, formatter);
You can call TextRenderer.DrawText with the HorizontalCenter and VerticalCenter flags.
Here is the code i'm using at the moment,
SizeF size;
string text = "Text goes here";
size = e.Graphics.MeasureString(text, font);
x = (lineWidth / 2) - (size.Width / 2);
y = top;
e.Graphics.DrawString(text, font, Brushes.Black, x, y);
I just wanted to add (a year later) a tool I created because StringAlignment turned out to be not very dependable. It turns out to be very similar to Neo's version.
The code below does an excellent job of centering the text both vertically and horizontally. Also, I wrote it with various overloads so that different options could be supplied to make this control behave exactly like I want.
Here are my overloads:
private static void DrawCenter(Label label, Graphics graphics) {
DrawCenter(label.Text, label, label.Location, label.ForeColor, graphics);
}
private void DrawCenter(string text, Label label, Graphics graphics) {
DrawCenter(text, label, label.Location, label.ForeColor, graphics);
}
private static void DrawCenter(string text, Label label, Point location, Graphics graphics) {
DrawCenter(text, label, location, label.ForeColor, graphics);
}
private static void DrawCenter(string text, Label label, Point location, Color fontColor, Graphics graphics) {
Rectangle rect = new Rectangle(location, label.Size);
SizeF lSize = graphics.MeasureString(text, label.Font, rect.Width);
PointF lPoint = new PointF(rect.X + (rect.Width - lSize.Width) / 2, rect.Y + (rect.Height - lSize.Height) / 2);
graphics.DrawString(text, label.Font, new SolidBrush(fontColor), lPoint);
}
To use these for the Label's OnPaint event, simply modify my original code in the question to following:
private void Label_OnPaint(object sender, PaintEventArgs e) {
base.OnPaint(e);
Label lbl = sender as Label;
if (lbl != null) {
string txt = lbl.Text;
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
if (myShowShadow) { // draw the shadow first!
Point offset = new Point(lbl.Location.X - 1, lbl.Location.Y - 1)
DrawCenter(txt, lbl, offset, myShadowColor, e.Graphics);
}
DrawCenter(lbl, e.Graphics);
}
}
For a Print_Document event, I have a version that will also print a box around the label if there is already a box around it in the designer:
private static void DrawCenter(string text, Label label, Point location, Color fontColor, Graphics graphics) {
Rectangle rect = new Rectangle(location, label.Size);
SizeF lSize = graphics.MeasureString(text, label.Font, rect.Width);
PointF lPoint = new PointF((rect.Width - lSize.Width) / 2, (rect.Height - lSize.Height) / 2);
graphics.DrawString(text, label.Font, new SolidBrush(fontColor), lPoint);
if (label.BorderStyle != BorderStyle.None) {
using (Pen p = new Pen(Color.Black)) {
graphics.DrawRectangle(p, rect);
}
}
}
If you find this at all useful, give me a +1.
~Joe