Solved

Center Diagonal Text on Picture?

Posted on 2009-07-01
4
481 Views
Last Modified: 2012-06-22
Me again, now trying to Center the diagonal text. Problem: the following code results in diagonal, but stacked and uncentered text in upper left corner of photo. Doesn't seem to matter what font size either...

[Example: Stacked (although diagonal]
This
Photo
Is
My
Property!

[Code]
private void btnWriteText_Click(object sender, System.EventArgs e)
{
                Bitmap bm = (Bitmap)PictureBox1.Image;
                Font f = new Font("Arial", 70);
                StringFormat sf = new StringFormat(); sf.LineAlignment = StringAlignment.Center; sf.Alignment = StringAlignment.Center;
                Graphics g = Graphics.FromImage(bm);
                g.RotateTransform(45);
                g.DrawString("This Photo Is My Property", f, Brushes.Gray, ClientRectangle, sf);

      this.PictureBox1.Image = bm;
}
0
Comment
Question by:pointeman
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 3

Accepted Solution

by:
DaemonFish earned 250 total points
ID: 24756632
Use the Graphics object TranslateTransform to move the origin of the transformation matrix to the center of the image( so transform it half of the width, and half of the height of the image. Then apply the RotateTransform.

The reason why it is not centered after your transform is that the text is not rotered from the text center, but from the transform origin that is upper left corner.

Hope this helps solve your problem :)
0
 

Author Comment

by:pointeman
ID: 24757879
Okay, somewhat better, but still seems to have a 'word-wrap' effect...
[New Code]
private void btnWriteText_Click(object sender, System.EventArgs e)
{
                Bitmap bm = (Bitmap)PictureBox1.Image;
                Font f = new Font("Arial", 70);
                StringFormat sf = new StringFormat(); sf.LineAlignment = StringAlignment.Center; sf.Alignment = StringAlignment.Center;
                Graphics g = Graphics.FromImage(bm);
               
               g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
              g.TranslateTransform(this.Width / 2, this.Height / 2);
              g.RotateTransform(320);
              g.DrawString("This Photo Is My Property", f, Brushes.Gray, ClientRectangle, sf);

      this.PictureBox1.Image = bm;
}
 
 
0
 
LVL 86

Assisted Solution

by:Mike Tomlinson
Mike Tomlinson earned 250 total points
ID: 24758905
What size images are you working with here?...

This worked nicely with a 600x600 image and a Font size of 20:
        private void btnWrite_Click(object sender, EventArgs e)
        {
            Font f = new Font("Arial",20);
            StringFormat sf = new StringFormat();
            sf.LineAlignment = StringAlignment.Center;
            sf.Alignment = StringAlignment.Center;
 
            string msg = "This\r\nPhoto\r\nIs\r\nMy\r\nProperty";
            Bitmap bm = (Bitmap)PictureBox1.Image;
            Graphics g = Graphics.FromImage(bm);
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
            g.TranslateTransform(bm.Width / 2, bm.Height / 2);
            g.RotateTransform(320);
            Rectangle rc = new Rectangle(new Point(-(bm.Width / 2), -(bm.Height / 2)), bm.Size);
            g.DrawString(msg, f, Brushes.Gray, rc, sf);
            g.Dispose();
 
            this.PictureBox1.Image = bm;
        }

Open in new window

0
 

Author Comment

by:pointeman
ID: 24759404
Yea, I'm finding the Image size is critical, so I must settle for a specific size.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question