v1.1.0 - 2020-01-06

Author: flashwave

TopMostFriend/AboutWindow.cs

@@ -9,16 +9,13 @@ public sealed class AboutWindow : Form {
         private const int BUTTON_HEIGHT = 23;
         private const int BUTTON_WIDTH = 70;
 
-        public const int WM_NCLBUTTONDOWN = 0xA1;
-        public const int HT_CAPTION = 0x02;
-
         public static void Display() {
             using (AboutWindow about = new AboutWindow())
                 about.ShowDialog();
         }
 
         public AboutWindow() {
-            Text = $@"About Top Most Friend";
+            Text = @"About Top Most Friend";
             Icon = Icon.ExtractAssociatedIcon(Application.ExecutablePath);
             BackgroundImage = Properties.Resources.about;
             StartPosition = FormStartPosition.CenterScreen;
@@ -81,7 +78,7 @@ public AboutWindow() {
             Controls.Add(creditButtonfff);
 
             Controls.Add(new Label {
-                Text = Application.ProductVersion,
+                Text = @"v" + Application.ProductVersion.Substring(0, Application.ProductVersion.Length - 2), // cut off the last dingus
                 TextAlign = ContentAlignment.MiddleLeft,
                 AutoSize = true,
                 Location = new Point(127, 97),
@@ -93,8 +90,8 @@ public AboutWindow() {
         protected override void OnMouseDown(MouseEventArgs e) {
             base.OnMouseDown(e);
 
-            Program.ReleaseCapture();
-            Program.SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
+            Win32.ReleaseCapture();
+            Win32.SendMessage(Handle, Win32.WM_NCLBUTTONDOWN, Win32.HT_CAPTION, 0);
         }
     }
 }

TopMostFriend/HotKeyWindow.cs

@@ -0,0 +1,110 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+
+namespace TopMostFriend {
+    public sealed class HotKeyWindow : Form {
+        public class HotKeyInfo {
+            public string Name { get; }
+            public int Atom { get; }
+            public int Key { get; }
+            public Action Action { get; }
+
+            public HotKeyInfo(string name, int atom, int key, Action action) {
+                Name = name ?? throw new ArgumentNullException(nameof(name));
+                Atom = atom;
+                Key = key;
+                Action = action ?? throw new ArgumentNullException(nameof(action));
+            }
+        }
+
+        private readonly List<HotKeyInfo> RegisteredHotKeys = new List<HotKeyInfo>();
+
+        public HotKeyWindow() {
+            ShowInTaskbar = false;
+            Text = string.Empty;
+            FormBorderStyle = FormBorderStyle.None;
+            StartPosition = FormStartPosition.Manual;
+            Size = new Size(1, 1);
+            Location = new Point(-9999, -9999);
+            CreateHandle();
+            Hide();
+        }
+
+        protected override void OnFormClosing(FormClosingEventArgs e) {
+            e.Cancel = e.CloseReason == CloseReason.UserClosing;
+        }
+
+        protected override void WndProc(ref Message m) {
+            base.WndProc(ref m);
+
+            if(m.Msg == Win32.WM_HOTKEY) {
+                int keyCode = m.LParam.ToInt32();
+
+                lock (RegisteredHotKeys)
+                    RegisteredHotKeys.FirstOrDefault(x => x.Key == keyCode)?.Action.Invoke();
+            }
+        }
+
+        protected override void Dispose(bool disposing) {
+            lock (RegisteredHotKeys) {
+                HotKeyInfo[] hotKeys = RegisteredHotKeys.ToArray();
+
+                foreach(HotKeyInfo hotKey in hotKeys)
+                    Unregister(hotKey.Atom);
+            }
+
+            base.Dispose(disposing);
+        }
+
+        public int Register(string name, Win32ModKeys modifiers, Keys key, Action action) {
+            if (action == null)
+                throw new ArgumentNullException(nameof(action));
+            if(string.IsNullOrEmpty(name))
+                name = Guid.NewGuid().ToString();
+
+            int atom = Win32.GlobalAddAtom(name);
+            int keyCode = ((ushort)key << 16) | (ushort)modifiers;
+
+            if (atom == 0)
+                throw new Win32Exception(Marshal.GetLastWin32Error(), @"Atom creation failed.");
+
+            if (!Win32.RegisterHotKey(Handle, atom, modifiers, key)) {
+                Win32.GlobalDeleteAtom((ushort)atom);
+                throw new Win32Exception(Marshal.GetLastWin32Error(), @"Hotkey registration failed.");
+            }
+
+            lock(RegisteredHotKeys)
+                RegisteredHotKeys.Add(new HotKeyInfo(name, atom, keyCode, action));
+
+            return atom;
+        }
+
+        public void Unregister(int id) {
+            if (id < 1)
+                return;
+
+            lock (RegisteredHotKeys) {
+                if (!RegisteredHotKeys.Any(x => x.Atom == id))
+                    return;
+                RegisteredHotKeys.RemoveAll(x => x.Atom == id);
+            }
+
+            Win32.UnregisterHotKey(Handle, id);
+            Win32.GlobalDeleteAtom((ushort)id);
+        }
+
+        public void Unregister(string name) {
+            int atom = 0;
+
+            lock (RegisteredHotKeys)
+                atom = RegisteredHotKeys.FirstOrDefault(x => x.Name == name)?.Atom ?? 0;
+
+            Unregister(atom);
+        }
+    }
+}