What is the difference between System.Drawing.Point and System.Drawing.PointF.
Can you give an example between this two.
Thanks in advance.
views:
96answers:
4
+10
A:
Point uses integer coordinates (int for X and Y).
PointF uses floating points (float for X and Y).
Jon Skeet
2010-09-17 08:29:03
Thanks for the response. But where can I use `PointF`?
Rye
2010-09-17 08:36:00
In almost all the methods on `System.Drawing.Graphics`. For example, `Graphics.DrawLine` can take either `Point` or `PointF` parameters.
Timwi
2010-09-17 08:39:01
@Timwi thanks, so PointF cannot be use on user control properties? for example `Location`?
Rye
2010-09-17 08:49:38
@Rye: I believe most of Windows Forms uses an integer coordinate system, whereas most of WPF uses a `double`-based coordinate system.
Jon Skeet
2010-09-17 09:01:46
A:
Hans Kesting
2010-09-17 08:30:58
Why the downvote? The question sounded like something the OP could figure out himself, at least the "difference" part.
Hans Kesting
2010-09-17 08:49:56
A:
For Example,In some embedded systems,only support "System.Drawing.Point",you should create "PointF" Type by yourself .
Smart_Joe
2010-09-17 09:04:29
+1
A:
I think PointF exists partly because System.Drawing.Graphics class supports transformation and anti-aliasing. For example, you can draw a line between discrete pixelx in anti-aliasing mode.
private void Form1_Paint(object sender, PaintEventArgs e)
{
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
Pen pen = Pens.Red;
// draw two vertical line
e.Graphics.DrawLine(pen, new Point(100, 100), new Point(100, 200));
e.Graphics.DrawLine(pen, new Point(103, 100), new Point(103, 200));
// draw a line exactly in the middle of those two lines
e.Graphics.DrawLine(pen, new PointF(101.5f, 200.0f), new PointF(101.5f, 300.0f)); ;
}
and it will look like
without PointF those functionalities will be limited.
tia
2010-09-17 13:23:52