First step in moving towards replaceable notification messages, extracted the logic to do so into it's own module. [skip ci]

Greenshot/Helpers/NotifyIconNotificationService.cs

@@ -0,0 +1,125 @@
+/*
+ * Greenshot - a free and open source screenshot tool
+ * Copyright (C) 2007-2020 Thomas Braun, Jens Klingen, Robin Krom
+ *
+ * For more information see: http://getgreenshot.org/
+ * The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System;
+using System.Windows.Forms;
+using GreenshotPlugin.Core;
+using log4net;
+
+namespace Greenshot.Helpers
+{
+    /// <summary>
+    /// Notify the user with messages via the NotifyIcon
+    /// </summary>
+    public class NotifyIconNotificationService
+    {
+        private static readonly ILog Log = LogManager.GetLogger(typeof(NotifyIconNotificationService));
+        private readonly NotifyIcon _notifyIcon;
+
+        public NotifyIconNotificationService()
+        {
+            _notifyIcon = SimpleServiceProvider.Current.GetInstance<NotifyIcon>();
+        }
+
+        /// <summary>
+        /// This will show a warning message to the user
+        /// </summary>
+        /// <param name="message">string</param>
+        /// <param name="timeout"></param>
+        /// <param name="onClickAction">Action called if the user clicks the notification</param>
+        /// <param name="onClosedAction">Action</param>
+        public void ShowWarningMessage(string message, int timeout, Action onClickAction = null, Action onClosedAction = null)
+        {
+            ShowMessage(message, timeout, ToolTipIcon.Warning, onClickAction, onClosedAction);
+        }
+
+        /// <summary>
+        /// This will show an error message to the user
+        /// </summary>
+        /// <param name="message">string</param>
+        /// <param name="timeout"></param>
+        /// <param name="onClickAction">Action called if the user clicks the notification</param>
+        /// <param name="onClosedAction">Action</param>
+        public void ShowErrorMessage(string message, int timeout, Action onClickAction = null, Action onClosedAction = null)
+        {
+            ShowMessage(message, timeout, ToolTipIcon.Error, onClickAction, onClosedAction);
+        }
+
+        /// <summary>
+        /// This will show an info message to the user
+        /// </summary>
+        /// <param name="message">string</param>
+        /// <param name="timeout">int</param>
+        /// <param name="onClickAction">Action called if the user clicks the notification</param>
+        /// <param name="onClosedAction">Action</param>
+        public void ShowInfoMessage(string message, int timeout, Action onClickAction = null, Action onClosedAction = null)
+        {
+            ShowMessage(message, timeout, ToolTipIcon.Info, onClickAction, onClosedAction);
+        }
+
+        /// <summary>
+        /// This will show a message to the user
+        /// </summary>
+        /// <param name="message">string</param>
+        /// <param name="timeout">int</param>
+        /// <param name="level">ToolTipIcon</param>
+        /// <param name="onClickAction">Action</param>
+        /// <param name="onClosedAction">Action</param>
+        public void ShowMessage(string message, int timeout, ToolTipIcon level, Action onClickAction = null, Action onClosedAction = null) {
+            void BalloonClickedHandler(object s, EventArgs e)
+            {
+                try
+                {
+                    onClickAction?.Invoke();
+                }
+                catch (Exception ex)
+                {
+                    Log.Warn("Exception while handling the onclick action: ", ex);
+                }
+
+                _notifyIcon.BalloonTipClicked -= BalloonClickedHandler;
+            }
+
+            if (onClickAction != null)
+            {
+                _notifyIcon.BalloonTipClicked += BalloonClickedHandler;
+            }
+
+            void BalloonClosedHandler(object s, EventArgs e)
+            {
+                try
+                {
+                    onClosedAction?.Invoke();
+                }
+                catch (Exception ex)
+                {
+                    Log.Warn("Exception while handling the onClosed action: ", ex);
+                }
+
+                _notifyIcon.BalloonTipClosed -= BalloonClosedHandler;
+                // Remove the other handler too
+                _notifyIcon.BalloonTipClicked -= BalloonClickedHandler;
+            }
+            _notifyIcon.BalloonTipClosed += BalloonClosedHandler;
+            _notifyIcon.ShowBalloonTip(timeout, @"Greenshot", message, level);
+        }
+    }
+}