/// <summary>
/// Inits the taskbar icon and registers a message listener
/// in order to receive events from the taskbar area.
/// </summary>
public TaskbarIcon()
{
//using dummy sink in design mode
messageSink = Util.IsDesignMode ? WindowMessageSink.CreateEmpty() : new WindowMessageSink(NotifyIconVersion.Win95);
//init icon data structure
iconData = NotifyIconData.CreateDefault(messageSink.MessageWindowHandle);
//create the taskbar icon
CreateTaskbarIcon();
//register event listeners
messageSink.MouseEventReceived += OnMouseEvent;
messageSink.TaskbarCreated += OnTaskbarCreated;
messageSink.ChangeToolTipStateRequest += OnToolTipChange;
messageSink.BalloonToolTipChanged += OnBalloonToolTipChanged;
//init single click / balloon timers
singleClickTimer = new Timer(DoSingleClickAction);
balloonCloseTimer = new Timer(CloseBalloonCallback);
//register listener in order to get notified when the application closes
if (Application.Current != null) Application.Current.Exit += OnExit;
}
/// <summary>
/// Creates a default data structure that provides
/// a hidden taskbar icon without the icon being set.
/// </summary>
/// <param name="handle"></param>
/// <returns></returns>
public static NotifyIconData CreateDefault(IntPtr handle)
{
var data = new NotifyIconData();
if (Environment.OSVersion.Version.Major >= 6)
{
//use the current size
data.cbSize = (uint) Marshal.SizeOf(data);
}
else
{
//we need to set another size on xp/2003- otherwise certain
//features (e.g. balloon tooltips) don't work.
data.cbSize = 504;
//set to fixed timeout
data.VersionOrTimeout = 10;
}
data.WindowHandle = handle;
data.TaskbarIconId = 0x0;
data.CallbackMessageId = WindowMessageSink.CallbackMessageId;
data.VersionOrTimeout = (uint) NotifyIconVersion.Win95;
data.IconHandle = IntPtr.Zero;
//hide initially
data.IconState = IconState.Hidden;
data.StateMask = IconState.Hidden;
//set flags
data.ValidMembers = IconDataMembers.Message | IconDataMembers.Icon | IconDataMembers.Tip;
//reset strings
data.ToolTipText = data.BalloonText = data.BalloonTitle = String.Empty;
return data;
}
