1using System;
 2using System.Drawing;
 3using System.Windows.Forms;
 4
 5namespace WindowCapture.UI
 6{
 7    public class KeyCaptureDialog : Form
 8    {
 9        private static readonly Color DarkBg = Color.FromArgb(30, 30, 32);
10        private static readonly Color DarkPanel = Color.FromArgb(40, 40, 42);
11        private static readonly Color TextColor = Color.FromArgb(200, 200, 200);
12        private static readonly Color DimText = Color.FromArgb(120, 120, 120);
13
14        public Keys CapturedKey { get; private set; }
15
16        public KeyCaptureDialog(string actionName)
17        {
18            Text = "Press a key";
19            Size = new Size(300, 120);
20            FormBorderStyle = FormBorderStyle.None;
21            MaximizeBox = false;
22            MinimizeBox = false;
23            StartPosition = FormStartPosition.CenterParent;
24            KeyPreview = true;
25            BackColor = DarkBg;
26
27            Paint += (s, e) =>
28            {
29                using (var pen = new Pen(DarkPanel, 2))
30                    e.Graphics.DrawRectangle(pen, 0, 0, Width - 1, Height - 1);
31            };
32
33            Label lbl = new Label();
34            lbl.Text = "Press key for: " + actionName;
35            lbl.Location = new Point(0, 30);
36            lbl.Size = new Size(Width, 24);
37            lbl.TextAlign = ContentAlignment.MiddleCenter;
38            lbl.ForeColor = TextColor;
39            lbl.Font = new Font("Segoe UI", 10f);
40            Controls.Add(lbl);
41
42            Label lblHint = new Label();
43            lblHint.Text = "ESC to cancel";
44            lblHint.Location = new Point(0, 65);
45            lblHint.Size = new Size(Width, 20);
46            lblHint.TextAlign = ContentAlignment.MiddleCenter;
47            lblHint.ForeColor = DimText;
48            lblHint.Font = new Font("Segoe UI", 9f);
49            Controls.Add(lblHint);
50
51            KeyDown += delegate(object s, KeyEventArgs e)
52            {
53                if (e.KeyCode == Keys.Escape)
54                {
55                    DialogResult = DialogResult.Cancel;
56                    Close();
57                }
58                else
59                {
60                    // Ignore standalone modifier presses (Ctrl/Shift/Alt/Win) — capturing them as a
61                    // binding produces a key that can never match a real keystroke. Wait for an actual key.
62                    if (e.KeyCode == Keys.ControlKey || e.KeyCode == Keys.ShiftKey ||
63                        e.KeyCode == Keys.Menu || e.KeyCode == Keys.LWin || e.KeyCode == Keys.RWin)
64                        return;
65                    CapturedKey = e.KeyCode;
66                    DialogResult = DialogResult.OK;
67                    Close();
68                }
69            };
70        }
71    }
72}