C# Create A Rounded Button

Published: 13 February 2019
on channel: CSharp61Programmer

488

C# From Beginner To Pro - Create A Rounded Button. Here is the code so you will not have to type.

public class RoundButton : Button
{

protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);

RectangleF Rect = new RectangleF(0, 0, this.Width, this.Height);
GraphicsPath GraphPath = GetRoundPath(Rect, 48);

this.Region = new Region(GraphPath);
Color borderColor = this.FlatAppearance.BorderColor;

using (Pen pen = new Pen(borderColor, 1.65f))
{
pen.Alignment = PenAlignment.Inset;

e.Graphics.InterpolationMode = InterpolationMode.High;
e.Graphics.CompositingQuality = CompositingQuality.HighQuality;
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;

e.Graphics.DrawPath(pen, GraphPath);
}
}

GraphicsPath GetRoundPath(RectangleF Rect, int radius)
{
float r2 = radius / 2f;
GraphicsPath GraphPath = new GraphicsPath();

GraphPath.AddArc(Rect.X, Rect.Y, radius, radius, 180, 90);
GraphPath.AddLine(Rect.X + r2, Rect.Y, Rect.Width - r2, Rect.Y);
GraphPath.AddArc(Rect.X + Rect.Width - radius, Rect.Y, radius, radius, 270, 90);
GraphPath.AddLine(Rect.Width, Rect.Y + r2, Rect.Width, Rect.Height - r2);
GraphPath.AddArc(Rect.X + Rect.Width - radius,
Rect.Y + Rect.Height - radius, radius, radius, 0, 90);
GraphPath.AddLine(Rect.Width - r2, Rect.Height, Rect.X + r2, Rect.Height);
GraphPath.AddArc(Rect.X, Rect.Y + Rect.Height - radius, radius, radius, 90, 90);
GraphPath.AddLine(Rect.X, Rect.Height - r2, Rect.X, Rect.Y + r2);

GraphPath.CloseFigure();
return GraphPath;
}

}

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