[Q] MeasureString results and mono-space fonts

[Stuart Norris]

Dear Group,

I have a question about the result from ‘graphics.Measu reString' when
using a mono-spaced font. Firstly I assume that Courier New font is
mono-spaced, ie each character takes up the same space when drawn on
the screen.

I am working on a program that requires displaying data in fixed width
font. I assumed that with ‘graphics.Measu reString' I could calculate
the width of the string when drawn in a specified font.

However as can be seen from my simple example, that I have attached,
where I have overridden the ‘OnPaint' method for a label, with a
mono-spaced font, that the width of two characters is not the
summation of two single characters.

In my program I determined that width of "WW" is not the same as "W" +
"W". From lines 62 – 65 of my example

"W" or "1" - 18.07 pixels wide
"WW" - 29.82 pixels wide
"WWWWWWWW" - 100.29 pixels wide

Why are the widths not exactly the same for each character?

I was hoping to use the information to render my display by moving to
specific places on the screen to render the string.

What am I missing about MeasureString and fonts?
Thanks again for any comments.
Stuart

using System;
using System.Drawing;
using System.Collecti ons;
using System.Componen tModel;
using System.Windows. Forms;
using System.Data;

namespace test
{
public class Form1 : System.Windows. Forms.Form
{
private myLabel label;
private System.Componen tModel.Containe r components = null;
public Form1()
{
InitializeCompo nent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Disp ose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code

private void InitializeCompo nent()
{
this.label = new myLabel();
this.label.Loca tion = new System.Drawing. Point(48, 72);
this.label.Name = "Label";
this.label.Size = new System.Drawing. Size(168, 104);
this.label.TabI ndex = 0;
this.label.Text = "Hi";
this.label.Font = new System.Drawing. Font("Courier New", 14.25F,
System.Drawing. FontStyle.Regul ar, System.Drawing. GraphicsUnit.Po int,
((System.Byte)( 0)));
this.AutoScaleB aseSize = new System.Drawing. Size(5, 13);
this.ClientSize = new System.Drawing. Size(292, 266);
this.Controls.A dd(this.label);
this.Name = "Form1";
this.Text = "Form1";
}
#endregion

[STAThread]
static void Main()
{
Application.Run (new Form1());
}
}
public class myLabel : Label
{
protected override void OnPaint(PaintEv entArgs e)
{
Graphics graphics = e.Graphics;
Font font = base.Font;

SizeF one = graphics.Measur eString("1", font);
SizeF wone = graphics.Measur eString("W", font);
SizeF two = graphics.Measur eString("WW", font);
SizeF ten = graphics.Measur eString("WWWWWW WW", font);
}
}
}

[John Wood]

You should try using MeasureCharacte rRanges, as this provides more accurate
results.

--
John Wood
EMail: first name, dot, last name, at priorganize.com

"Stuart Norris" <st**********@y ahoo.com.au> wrote in message
news:51******** *************** ***@posting.goo gle.com...

Dear Group,

I have a question about the result from 'graphics.Measu reString' when
using a mono-spaced font. Firstly I assume that Courier New font is
mono-spaced, ie each character takes up the same space when drawn on
the screen.

I am working on a program that requires displaying data in fixed width
font. I assumed that with 'graphics.Measu reString' I could calculate
the width of the string when drawn in a specified font.

However as can be seen from my simple example, that I have attached,
where I have overridden the 'OnPaint' method for a label, with a
mono-spaced font, that the width of two characters is not the
summation of two single characters.

In my program I determined that width of "WW" is not the same as "W" +
"W". From lines 62 - 65 of my example

"W" or "1" - 18.07 pixels wide
"WW" - 29.82 pixels wide
"WWWWWWWW" - 100.29 pixels wide

Why are the widths not exactly the same for each character?

I was hoping to use the information to render my display by moving to
specific places on the screen to render the string.

What am I missing about MeasureString and fonts?
Thanks again for any comments.
Stuart

using System;
using System.Drawing;
using System.Collecti ons;
using System.Componen tModel;
using System.Windows. Forms;
using System.Data;

namespace test
{
public class Form1 : System.Windows. Forms.Form
{
private myLabel label;
private System.Componen tModel.Containe r components = null;
public Form1()
{
InitializeCompo nent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Disp ose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code

private void InitializeCompo nent()
{
this.label = new myLabel();
this.label.Loca tion = new System.Drawing. Point(48, 72);
this.label.Name = "Label";
this.label.Size = new System.Drawing. Size(168, 104);
this.label.TabI ndex = 0;
this.label.Text = "Hi";
this.label.Font = new System.Drawing. Font("Courier New", 14.25F,
System.Drawing. FontStyle.Regul ar, System.Drawing. GraphicsUnit.Po int,
((System.Byte)( 0)));
this.AutoScaleB aseSize = new System.Drawing. Size(5, 13);
this.ClientSize = new System.Drawing. Size(292, 266);
this.Controls.A dd(this.label);
this.Name = "Form1";
this.Text = "Form1";
}
#endregion

[STAThread]
static void Main()
{
Application.Run (new Form1());
}
}
public class myLabel : Label
{
protected override void OnPaint(PaintEv entArgs e)
{
Graphics graphics = e.Graphics;
Font font = base.Font;

SizeF one = graphics.Measur eString("1", font);
SizeF wone = graphics.Measur eString("W", font);
SizeF two = graphics.Measur eString("WW", font);
SizeF ten = graphics.Measur eString("WWWWWW WW", font);
}
}
}

[BMermuys]

Hi,

"Stuart Norris" <st**********@y ahoo.com.au> wrote in message
news:51******** *************** ***@posting.goo gle.com...

Dear Group,

I have a question about the result from 'graphics.Measu reString' when
using a mono-spaced font. Firstly I assume that Courier New font is
mono-spaced, ie each character takes up the same space when drawn on
the screen.

I am working on a program that requires displaying data in fixed width
font. I assumed that with 'graphics.Measu reString' I could calculate
the width of the string when drawn in a specified font.

However as can be seen from my simple example, that I have attached,
where I have overridden the 'OnPaint' method for a label, with a
mono-spaced font, that the width of two characters is not the
summation of two single characters.

In my program I determined that width of "WW" is not the same as "W" +
"W". From lines 62 - 65 of my example

"W" or "1" - 18.07 pixels wide
"WW" - 29.82 pixels wide
"WWWWWWWW" - 100.29 pixels wide
Try using a typographic StringFormat:

SizeF one = graphics.Measur eString("1", font, 0,
StringFormat.Ge nericTypographi c);
SizeF wone = graphics.Measur eString("W", font,0,
StringFormat.Ge nericTypographi c);
SizeF two = graphics.Measur eString("WW", font,0,
StringFormat.Ge nericTypographi c);
SizeF ten = graphics.Measur eString("WWWWWW WWWW", font, 0,
StringFormat.Ge nericTypographi c);
Don't know exactly why or how but according to msdn the 'default
StringFormat' includes some space before and after the string when using
measurestring.

HTH,
greetings


Why are the widths not exactly the same for each character?

I was hoping to use the information to render my display by moving to
specific places on the screen to render the string.

What am I missing about MeasureString and fonts?
Thanks again for any comments.
Stuart

using System;
using System.Drawing;
using System.Collecti ons;
using System.Componen tModel;
using System.Windows. Forms;
using System.Data;

namespace test
{
public class Form1 : System.Windows. Forms.Form
{
private myLabel label;
private System.Componen tModel.Containe r components = null;
public Form1()
{
InitializeCompo nent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Disp ose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code

private void InitializeCompo nent()
{
this.label = new myLabel();
this.label.Loca tion = new System.Drawing. Point(48, 72);
this.label.Name = "Label";
this.label.Size = new System.Drawing. Size(168, 104);
this.label.TabI ndex = 0;
this.label.Text = "Hi";
this.label.Font = new System.Drawing. Font("Courier New", 14.25F,
System.Drawing. FontStyle.Regul ar, System.Drawing. GraphicsUnit.Po int,
((System.Byte)( 0)));
this.AutoScaleB aseSize = new System.Drawing. Size(5, 13);
this.ClientSize = new System.Drawing. Size(292, 266);
this.Controls.A dd(this.label);
this.Name = "Form1";
this.Text = "Form1";
}
#endregion

[STAThread]
static void Main()
{
Application.Run (new Form1());
}
}
public class myLabel : Label
{
protected override void OnPaint(PaintEv entArgs e)
{
Graphics graphics = e.Graphics;
Font font = base.Font;

SizeF one = graphics.Measur eString("1", font);
SizeF wone = graphics.Measur eString("W", font);
SizeF two = graphics.Measur eString("WW", font);
SizeF ten = graphics.Measur eString("WWWWWW WW", font);
}
}
}