Rectangle curved edges

[John Wood]

Do anyone know an easy way to draw rectangles with curved edges? I couldn't
see anything in Graphics that would provide that.

Thanks in advance.

 

[Tim Wilson]

You mean a rounded rectangle? You'll have to draw this yourself. You can do
this with a GraphicsPath object.
http://www.google.ca/groups?hl=en&lr=&ie=UTF-8&selm=#5a7uAiNCHA.2456@tkmsftngp08

 

[John Wood]

Ah thank you.

 

[Bob Powell [MVP]]

The GDI+ FAQ has answers to this and many other questions

--
Bob Powell [MVP]
Visual C#, System.Drawing

The Image Transition Library wraps up and LED style instrumentation is
available in the June of Well Formed for C# or VB programmers
http://www.bobpowell.net/currentissue.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/gdiplus_faq.htm

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[John Wood]

For anyone who's interested, I converted that code to C#:

public GraphicsPath GetGraphicsPath(int x, int y, int width, int height,
int radius)
{
GraphicsPath gp = new GraphicsPath();
gp.AddLine(x + radius, y, x + width - radius, y);
gp.AddArc(x + width - radius, y, radius, radius, 270, 90);
gp.AddLine(x + width, y + radius, x + width, y + height - radius);
gp.AddArc(x + width - radius, y + height - radius, radius, radius, 0,
90);
gp.AddLine(x + width - radius, y + height, x + radius, y + height);
gp.AddArc(x, y + height - radius, radius, radius, 90, 90);
gp.AddLine(x, y + height - radius, x, y + radius);
gp.AddArc(x, y, radius, radius, 180, 90);
gp.CloseFigure();
return gp;
}

public void DrawRoundRect(Graphics g, Pen p, int x, int y, int width, int
height, int radius)
{
GraphicsPath gp = GetGraphicsPath(x, y, width, height, radius);
g.DrawPath(p, gp);
gp.Dispose();
}

public void FillRoundRect(Graphics g, Brush b, int x, int y, int width,
int height, int radius)
{
GraphicsPath gp = GetGraphicsPath(x, y, width, height, radius);
g.FillPath(b, gp);
gp.Dispose();
}

 

[John Wood]

So it does.. thanks Bob.

 

[John Wood]

Just thought I'd let you know that I *LOVE* the new halo effect sample. Will
look very nice in my splash screen!

Thanks.

 

[Herfried K. Wagner [MVP]]

Do anyone know an easy way to draw rectangles with curved edges? I couldn't
see anything in Graphics that would provide that.

P/invoke on 'RoundRect':

\\\
Private Declare Function RoundRect Lib "gdi32.dll" ( _
ByVal hdc As IntPtr, _
ByVal X1 As Int32, _
ByVal Y1 As Int32, _
ByVal X2 As Int32, _
ByVal Y2 As Int32, _
ByVal X3 As Int32, _
ByVal Y3 As Int32 _
) As Int32
///

 

[Bob Powell [MVP]]

That was too simple )

--
Bob Powell [MVP]
Visual C#, System.Drawing

The Image Transition Library wraps up and LED style instrumentation is
available in the June of Well Formed for C# or VB programmers
http://www.bobpowell.net/currentissue.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/gdiplus_faq.htm

The GDI+ FAQ RSS feed: http://www.bobpowell.net/faqfeed.xml
Windows Forms Tips and Tricks RSS: http://www.bobpowell.net/tipstricks.xml
Bob's Blog: http://bobpowelldotnet.blogspot.com/atom.xml

 

[Herfried K. Wagner [MVP]]

That was too simple )

I didn't test it, but doesn't it work?

 

[John Wood]

I assume that would ignore the smoothing mode and stuff though...
Wouldn't it?

 

[Tim Wilson]

I would think so. And I would also assume that, since a Graphics object is
stateless, other things such as line style, color, thickness, etc would also
not be easily accessible without having to SelectObject/DeleteObject
everything into the underlying device context.

IntPtr hDC = e.Graphics.GetHdc();
// Create objects, select them in, select them out, and then delete them.
e.Graphics.ReleaseHdc(hDC);

But for a simple rounded rect the P/Invoke to RoundRect is good.

--
Tim Wilson
..Net Compact Framework MVP

I assume that would ignore the smoothing mode and stuff though...
Wouldn't it?