linear-app-launcher/Windows/Forms/AForm.cs

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

namespace AppLauncher.Windows.Forms
{
    public class AForm : Form
    {
        protected readonly Color borderColour = Color.FromArgb(232, 231, 236);
        protected readonly int borderWidth = 1;
        protected readonly Color titleBarColour = Color.FromArgb(237, 240, 247);
        protected readonly int titleBarHeight = 56;

        private bool isDragging = false;
        protected internal RyzStudio.Windows.Forms.TImageBox imageBox3;
        private Point startPosition = new Point();

        public AForm() : base()
        {
            InitializeComponent();

            if (!this.DesignMode)
            {
                this.FormBorderStyle = FormBorderStyle.None;
                this.StartPosition = FormStartPosition.Manual;
            }
        }

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


            this.SuspendLayout();
            imageBox3.Left = this.DisplayRectangle.Width - imageBox3.Width - 17;
            imageBox3.Top = 17;
            imageBox3.Anchor = (AnchorStyles.Top | AnchorStyles.Right);
            this.ResumeLayout();
        }

        protected override void OnMouseClick(MouseEventArgs e)
        {
            base.OnMouseClick(e);

            bool isLabel = ((e.Location.X >= 0) && (e.Location.X <= this.Width) && (e.Location.Y >= 0) && (e.Location.Y <= titleBarHeight));

            if (e.Button == MouseButtons.Left)
            {
                if (isLabel)
                {
                    // do nothing
                }
                else
                {
                    // do nothing
                }
            }
            else if (e.Button == MouseButtons.Right)
            {
                if (isLabel)
                {
                    if (this.TitleContextMenuStrip != null)
                    {
                        this.TitleContextMenuStrip.Show(this, e.Location);
                    }
                }
                else
                {
                    // do nothing
                }
            }
        }

        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);

            if (e.Button != MouseButtons.Left)
            {
                return;
            }

            isDragging = true;
            startPosition = e.Location;
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);

            if (isDragging)
            {
                int x = (this.Location.X + (e.Location.X - startPosition.X));
                int y = (this.Location.Y + (e.Location.Y - startPosition.Y));

                //this.Location = validateFormLocation(x, y);
                this.Location = new Point(x, y);
            }
        }

        protected override void OnMouseUp(MouseEventArgs e)
        {
            base.OnMouseUp(e);

            isDragging = false;
        }

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

            Graphics g = e.Graphics;
            Rectangle area = new Rectangle(this.DisplayRectangle.X, this.DisplayRectangle.Y, (this.DisplayRectangle.Width - borderWidth), (this.DisplayRectangle.Height - borderWidth));

            // border
            g.DrawRectangle(new Pen(borderColour, borderWidth), area);

            area.Inflate((-1 * borderWidth), (-1 * borderWidth));

            g.FillRectangle(new SolidBrush(titleBarColour), area.X, area.Y, (area.Width + area.X), titleBarHeight);
            g.DrawLine(new Pen(borderColour, 1), area.X, (titleBarHeight + 1), (area.Width + area.X), (titleBarHeight + 1));

            g.DrawImageUnscaled(Properties.Resources.app_icon_24, 17, 17);

            TextRenderer.DrawText(g, "Launcher", new Font(this.Font.FontFamily, 14F), new Point(58, 17), Color.FromArgb(156, 158, 171));

        }

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

            this.Invalidate();
        }

        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public override Color BackColor { get => base.BackColor; set => base.BackColor = Color.FromArgb(254, 254, 254); }

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

        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public new Padding Padding { get => base.Padding; set => base.Padding = new Padding(0); }

        [Category("Appearance")]
        public ContextMenuStrip TitleContextMenuStrip { get; set; } = null;

        protected Point DefaultLocation
        {
            get
            {
                Point newPosition = new Point(Cursor.Position.X, Cursor.Position.Y);
                newPosition.X -= (this.Width / 2);
                newPosition.Y -= (this.Height / 2);

                newPosition.X = Math.Max(newPosition.X, Screen.PrimaryScreen.WorkingArea.Left);
                newPosition.Y = Math.Max(newPosition.Y, Screen.PrimaryScreen.WorkingArea.Top);

                return newPosition;
            }
        }

        private void InitializeComponent()
        {
            this.imageBox3 = new RyzStudio.Windows.Forms.TImageBox();
            ((System.ComponentModel.ISupportInitialize)(this.imageBox3)).BeginInit();
            this.SuspendLayout();
            //
            // imageBox3
            //
            this.imageBox3.BackColor = System.Drawing.Color.Transparent;
            this.imageBox3.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
            this.imageBox3.ErrorImage = null;
            this.imageBox3.HighlightImage = global::AppLauncher.Resource1.close2_20;
            this.imageBox3.Image = global::AppLauncher.Resource1.close_20;
            this.imageBox3.InitialImage = null;
            this.imageBox3.Location = new System.Drawing.Point(12, 12);
            this.imageBox3.Name = "imageBox3";
            this.imageBox3.NormalImage = global::AppLauncher.Resource1.close_20;
            this.imageBox3.Size = new System.Drawing.Size(24, 24);
            this.imageBox3.SizeMode = System.Windows.Forms.PictureBoxSizeMode.CenterImage;
            this.imageBox3.TabIndex = 146;
            this.imageBox3.TabStop = false;
            this.imageBox3.MouseClick += new System.Windows.Forms.MouseEventHandler(this.imageBox3_MouseClick);
            //
            // AForm
            //
            this.ClientSize = new System.Drawing.Size(421, 321);
            this.Controls.Add(this.imageBox3);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            this.Name = "AForm";
            ((System.ComponentModel.ISupportInitialize)(this.imageBox3)).EndInit();
            this.ResumeLayout(false);

        }

        private void imageBox3_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                this.Close();
            }
        }

    }
}