Rewrote hotkeys handling

Form1.Designer.cs

@@ -662,6 +662,7 @@ namespace photo_sorter
             this.Controls.Add(this.menuStrip1);
             this.Controls.Add(this.split_container_main);
             this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
+            this.KeyPreview = true;
             this.MainMenuStrip = this.menuStrip1;
             this.MinimumSize = new System.Drawing.Size(1024, 480);
             this.Name = "form_main";

Form1.cs

@@ -273,52 +273,51 @@ namespace photo_sorter
             }
         }
 
-        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
+        protected override bool ProcessCmdKey(ref Message msg, Keys key_data)
         {
             if (tsi_enableGlobalHotkeys.Checked)
             {
-                if (keyData == Keys.Enter)
+                switch (key_data)
                 {
-                    sort_image();
-                    return true;
-                }
-                if (keyData == Keys.PageUp)
-                {
-                    if (global.filecount > 1)
-                        prev_image();
-                    return true;
-                }
-                if (keyData == Keys.PageDown)
-                {
-                    if (global.filecount > 1)
-                        next_image();
-                    return true;
-                }
-                if (keyData == Keys.Home)
-                {
-                    if (global.filecount > 1)
-                    {
-                        status_msg("Loading first image...");
-                        global.position = 0;
-                        update_image();
-                    }
-                    return true;
-                }
-                if (keyData == Keys.End)
-                {
-                    if (global.filecount > 1)
-                    {
-                        status_msg("Loading final image...");
-                        global.position = global.filecount - 1;
-                        update_image();
-                    }
-                    return true;
+                    case Keys.PageUp:
+                        if (global.filecount > 1)
+                            prev_image();
+                        return true;
+                    case Keys.PageDown:
+                        if (global.filecount > 1)
+                            next_image();
+                        return true;
+                    case Keys.Shift | Keys.Home:
+                        if (global.filecount > 1)
+                        {
+                            status_msg("Loading first image...");
+                            global.position = 0;
+                            update_image();
+                        }
+                        return true;
+                    case Keys.Shift | Keys.End:
+                        if (global.filecount > 1)
+                        {
+                            status_msg("Loading final image...");
+                            global.position = global.filecount - 1;
+                            update_image();
+                        }
+                        return true;
+                    case Keys.Enter:
+                        sort_image();
+                        return true;
+                    case Keys.Delete:
+                        delete_image();
+                        return true;
+                    case Keys.Shift | Keys.Enter:
+                        delete_image();
+                        return true;
                 }
             }
-            return base.ProcessCmdKey(ref msg, keyData);
+            return base.ProcessCmdKey(ref msg, key_data);
         }
 
-        public void next_image()
+    public void next_image()
         {
             status_msg("Loading next image...");
             if (global.position < global.filecount - 1)