linear-app-launcher/MainForm.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AppLauncher
{
    public partial class MainForm : Form
    {
        private bool windowDragging = false;
        private Point windowOffset = new Point();

        public MainForm()
        {
            InitializeComponent();

            this.FormBorderStyle = FormBorderStyle.None;
            this.StartPosition = FormStartPosition.Manual;
        }

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

            int requestedHeight = (int)Math.Floor(decimal.Divide((Screen.PrimaryScreen.WorkingArea.Height - this.Height), 2));

            this.Location = new Point(Screen.PrimaryScreen.WorkingArea.X, (Screen.PrimaryScreen.WorkingArea.Y + requestedHeight));



            //foreach (Screen item in Screen.AllScreens)
            //{
            //    richTextBox1.Text += item.Bounds.ToString() + Environment.NewLine;
            //    richTextBox1.Text += item.WorkingArea.ToString() + Environment.NewLine;

            //    richTextBox1.Text += Environment.NewLine;
            //}

        }

        //protected override void OnLocationChanged(EventArgs e)
        //{
        //    base.OnLocationChanged(e);

        //    this.Location = new Point(Screen.PrimaryScreen.WorkingArea.X, this.Location.Y);
        //}

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

            //Graphics g = e.Graphics;
            //g.TextRenderingHint = TextRenderingHint.AntiAlias;
            //g.InterpolationMode = InterpolationMode.HighQualityBilinear;
            //g.PixelOffsetMode = PixelOffsetMode.HighQuality;
            //g.SmoothingMode = SmoothingMode.HighQuality;

            //g.FillRectangle(new LinearGradientBrush(this.DisplayRectangle, Color.FromArgb(76, 83, 93), Color.FromArgb(255, 255, 255), -30F), this.DisplayRectangle);

        }


        //protected override void OnPaintBackground(PaintEventArgs e)
        //{
        //    // do nothing
        //}

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

        //    if (this.BackgroundImage == null)
        //    {
        //        return;
        //    }

        //    Graphics g = e.Graphics;

        //    g.TextRenderingHint = TextRenderingHint.AntiAlias;
        //    g.InterpolationMode = InterpolationMode.HighQualityBilinear;
        //    g.PixelOffsetMode = PixelOffsetMode.HighQuality;
        //    g.SmoothingMode = SmoothingMode.HighQuality;

        //    g.DrawImage(this.BackgroundImage, Point.Empty);
        //}

        private void panel1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button != MouseButtons.Left)
            {
                return;
            }

            windowDragging = true;
            windowOffset = e.Location;
        }

        private void panel1_MouseUp(object sender, MouseEventArgs e)
        {
            windowDragging = false;
        }

        private void panel1_MouseMove(object sender, MouseEventArgs e)
        {
            if (windowDragging)
            {
                Point pos = this.PointToScreen(e.Location);
                //this.Location = new Point(currentScreenPos.X - windowOffset.X, currentScreenPos.Y - windowOffset.Y);

                int y = Math.Max((pos.Y - windowOffset.Y), Screen.PrimaryScreen.WorkingArea.Y);
                y = Math.Min(y, (Screen.PrimaryScreen.WorkingArea.Y + Screen.PrimaryScreen.WorkingArea.Height) - this.Height);

                this.Location = new Point(Screen.PrimaryScreen.WorkingArea.X, y);
            }
        }

        //private void Form1_MouseDown(object sender, MouseEventArgs e)
        //{
        //    const int WM_NCLBUTTONDOWN = 0xA1;
        //    const int HT_CAPTION = 0x2;

        //    this.Capture = false;

        //    Message msg = Message.Create(this.Handle, WM_NCLBUTTONDOWN, (IntPtr)HT_CAPTION, IntPtr.Zero);

        //    WndProc(ref msg);
        //}

    }
}