linear-app-launcher/RyzStudio/Windows/ThemedForms/TUserControl.cs

using System;
using System.Drawing;
using System.Windows.Forms;
using RyzStudio.Drawing;
using System.ComponentModel;

namespace RyzStudio.Windows.ThemedForms
{
    public partial class TUserControl : System.Windows.Forms.UserControl
    {
        public class ThemeStyle
        {
            public int BorderWidth;
            public int BorderRadius;
            public int BorderPadding;
            public Color BorderColour;
            public Color BackColour;
            public Color ForeColour;

            public ThemeStyle(int borderWidth, int borderRadius, int borderPadding, Color borderColour, Color backColour)
            {
                this.BorderWidth = borderWidth;
                this.BorderRadius = borderRadius;
                this.BorderPadding = borderPadding;
                this.BorderColour = borderColour;
                this.BackColour = backColour;
                this.ForeColour = Color.Black;
            }

            public ThemeStyle(int borderWidth, int borderRadius, int borderPadding, Color borderColour, Color backColour, Color foreColour)
            {
                this.BorderWidth = borderWidth;
                this.BorderRadius = borderRadius;
                this.BorderPadding = borderPadding;
                this.BorderColour = borderColour;
                this.BackColour = backColour;
                this.ForeColour = foreColour;
            }
        }

        protected ThemeStyle styleActive = new ThemeStyle(1, 3, 2, Color.FromArgb(212, 212, 212), Color.White);

        public TUserControl()
        {
            InitializeComponent();
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

			this.BackColor = Color.Transparent;
		}

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

			Graphics g = e.Graphics;
            //g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            //g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            //g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
            //g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

            updateBackground(g, styleActive);
        }

        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public new Padding Padding { get => base.Padding; set => base.Padding = value; }

        protected virtual void updateBackground(Graphics g, ThemeStyle style)
		{
			int b = (styleActive.BorderWidth + 1) + styleActive.BorderPadding;

			this.Padding = new Padding(b, b, (b - 1), (b - 1));

			Rectangoid area = new Rectangoid(this.ClientRectangle, style.BorderRadius, style.BorderWidth);
			g.FillPath(new SolidBrush(style.BackColour), area.ToGraphicsPath());
			g.DrawPath(new Pen(new SolidBrush(style.BorderColour), style.BorderWidth), area.ToGraphicsPath());
		}

        protected virtual void close()
        {
            if (this.Parent == null)
            {
                return;
            }

            if (this.Parent is Form)
            {
                (this.Parent as Form).Close();
                return;
            }

            if (this.Parent.GetType().IsSubclassOf(typeof(System.Windows.Forms.Form)))
            {
                System.Windows.Forms.Form parentForm = (System.Windows.Forms.Form)this.Parent;
                if (parentForm != null)
                {
                    parentForm.Close();
                }
            }
        }

    }
}