/// <summary>
/// Return the screen on which the taskbar with the given handle is displayed
/// </summary>
/// <param name="taskbarHwnd"></param>
/// <returns></returns>
private static Screen FindTaskbarScreen(IntPtr taskbarHwnd)
{
Rectangle taskbarRect = WindowUtils.GetWindowBounds(taskbarHwnd);
var screens = Screen.AllScreens.ToList();
return(screens.FirstOrDefault(x => x.Bounds.IntersectsWith(taskbarRect)));
}
/// <summary>
/// Get the docking position of the taskbar with the given handle
/// </summary>
/// <param name="taskbarHwnd"></param>
/// <returns></returns>
internal static TaskbarDockPosition GetTaskbarDockPosition(IntPtr taskbarHwnd)
{
Screen screen = FindTaskbarScreen(taskbarHwnd);
var taskbarRect = WindowUtils.GetWindowBounds(taskbarHwnd);
if (screen.Bounds.Left == taskbarRect.Left && screen.Bounds.Top == taskbarRect.Top)
{
// taskbar touches the top left corner
if (taskbarRect.Right == screen.Bounds.Right)
{
// ... and the top right corner as well
return(TaskbarDockPosition.Top);
}
else
{
return(TaskbarDockPosition.Left);
}
}
else
{
// taskbar touches the bottom right corner
if (taskbarRect.Left == screen.Bounds.Left)
{
// and the bottom left corner as welt
return(TaskbarDockPosition.Bottom);
}
else
{
return(TaskbarDockPosition.Right);
}
}
}
/// <summary>
/// Reevaluates the DockPosition and Bounds
/// and raises the PositionOrSizeChanged event if necessary
/// </summary>
public void Update(IntPtr childHwnd)
{
var oldDockPosition = DockPosition;
var oldBounds = Bounds;
if (childHwnd == IntPtr.Zero)
{
DockPosition = TaskbarUtils.GetTaskbarDockPosition(Handle);
Bounds = WindowUtils.GetWindowBounds(Handle);
// raised by the main taskbar, check if it was moved
if (oldDockPosition != DockPosition || oldBounds != Bounds)
{
RaisePositionOrSizeChanged(IntPtr.Zero);
}
}
else
{
if (ObservedChildBoundChanges.TryGetValue(childHwnd, out Rectangle childRect))
{
// check if the child bounds have really changed
var screenRect = WindowUtils.GetWindowBounds(childHwnd);
if (!screenRect.Equals(childRect))
{
RaisePositionOrSizeChanged(childHwnd);
}
}
}
}
public void RegisterObservableChild(IntPtr hwnd)
{
if (hwnd != IntPtr.Zero)
{
ObservedChildBoundChanges[hwnd] = WindowUtils.GetWindowBounds(hwnd);
}
}
/// <summary>
/// Show the primary taskbar's calendar flyout at the given location with the given alignment
/// </summary>
public static void ShowCalendarFlyOut(Rectangle alignTo, FlyoutAlignment alignment)
{
// get all window handles which have the same class as the
// flyout, so that we know these are not the flyout
var nonFlyoutHandles = WindowUtils.ListWindowsWithClass(CalendarFlyoutClassName);
// invoke the primary taskbar's calendar flyout
if (TaskbarUtils.InvokeCalendarFlyOut())
{
// wait for it to open (max. 2 seconds)
IntPtr flyoutHwnd = IntPtr.Zero;
int start = Environment.TickCount;
while (flyoutHwnd == IntPtr.Zero && (Environment.TickCount - start <= 2000))
{
flyoutHwnd = TaskbarUtils.GetCalendarFlyoutHwnd(nonFlyoutHandles);
}
if (flyoutHwnd != IntPtr.Zero)
{
// and move it to this clock's location
NativeImports.RECT flyoutRect;
if (NativeImports.GetWindowRect(flyoutHwnd, out flyoutRect))
{
int flyoutWidth = flyoutRect.Right - flyoutRect.Left;
int flyoutHeight = flyoutRect.Bottom - flyoutRect.Top;
switch (alignment)
{
case FlyoutAlignment.Below:
// place the calendar flyout below the clock
NativeImports.SetWindowPos(flyoutHwnd, IntPtr.Zero, alignTo.Right - flyoutWidth, alignTo.Bottom, 0, 0, NativeImports.SetWindowPosFlags.SWP_NOSIZE);
break;
case FlyoutAlignment.Above:
// place the calendar flyout above the clock
NativeImports.SetWindowPos(flyoutHwnd, IntPtr.Zero, alignTo.Right - flyoutWidth, alignTo.Top - flyoutHeight, 0, 0, NativeImports.SetWindowPosFlags.SWP_NOSIZE);
break;
case FlyoutAlignment.ToTheRight:
// place the calendar flyout to the right of the clock
NativeImports.SetWindowPos(flyoutHwnd, IntPtr.Zero, alignTo.Right, alignTo.Bottom - flyoutHeight, 0, 0, NativeImports.SetWindowPosFlags.SWP_NOSIZE);
break;
case FlyoutAlignment.ToTheLeft:
// place the calendar flyout to the left of the clock
NativeImports.SetWindowPos(flyoutHwnd, IntPtr.Zero, alignTo.Left - flyoutWidth, alignTo.Bottom - flyoutHeight, 0, 0, NativeImports.SetWindowPosFlags.SWP_NOSIZE);
break;
}
}
}
}
}
/// <summary>
/// Return the handle of the taskbar's calendar flyout window
/// </summary>
/// <param name="exceptHandles">Only a potenial flyout window with a handle not in this set is returned</param>
/// <returns></returns>
private static IntPtr GetCalendarFlyoutHwnd(ISet <IntPtr> exceptHandles)
{
// since the text of the calendar flyout is language-dependent and the
// class name is not unique, we search for a window of class
// Windows.UI.Core.CoreWindow which touches the primary taskbar's clock
// and is not contained in the passed set exceptHandles
IntPtr taskbarClockHwnd = GetPrimaryTaskbarClockHwnd();
Rectangle taskbarClockRect = WindowUtils.GetWindowBounds(taskbarClockHwnd);
IntPtr candidateHwnd = NativeImports.FindWindowEx(IntPtr.Zero, IntPtr.Zero, CalendarFlyoutClassName, null);
while (candidateHwnd != IntPtr.Zero)
{
// is this window a potential candidate to be the calendar flyout?
if (!exceptHandles.Contains(candidateHwnd))
{
// does the current window touch the primary taskbar's clock?
Rectangle candidateRect = WindowUtils.GetWindowBounds(candidateHwnd);
candidateRect.Intersect(taskbarClockRect);
// if the two rectangles touch, intersect results in a rectangle
// where exactly one dimension is zero
if ((candidateRect.Width == 0 && candidateRect.Height > 0) ||
(candidateRect.Width > 0 && candidateRect.Height == 0))
{
// with a very high probability, this is the calendar flyout
return(candidateHwnd);
}
}
// find the next window with the calendar class
candidateHwnd = NativeImports.FindWindowEx(IntPtr.Zero, candidateHwnd, CalendarFlyoutClassName, null);
}
return(IntPtr.Zero);
/*
* // if we have the localized window text, we may use the following
* const string flyoutClassname = "Windows.UI.Core.CoreWindow";
* const string flyoutText = "Datums- und Uhrzeitinformationen";
*
* IntPtr hwnd = NativeImports.FindWindowEx(IntPtr.Zero, IntPtr.Zero, flyoutClassname, flyoutText);
* return hwnd;*/
}
/// <summary>
/// Return all visible taskbars
/// </summary>
public static IList <TaskbarRef> ListTaskbars()
{
List <TaskbarRef> taskbars = new List <TaskbarRef>();
// get the primary taskbar
var primaryHwnd = GetPrimaryTaskbarHwnd();
taskbars.Add(new TaskbarRef(true, primaryHwnd, WindowUtils.GetWindowBounds(primaryHwnd), GetTaskbarDockPosition(primaryHwnd)));
// find all secondary taskbars
IntPtr secondaryHwnd = NativeImports.FindWindowEx(IntPtr.Zero, IntPtr.Zero, SecondaryTaskbarClassName, null);
while (secondaryHwnd != IntPtr.Zero)
{
taskbars.Add(new TaskbarRef(false, secondaryHwnd, WindowUtils.GetWindowBounds(secondaryHwnd), GetTaskbarDockPosition(secondaryHwnd)));
// get the next secondary taskbar (if any)
secondaryHwnd = NativeImports.FindWindowEx(IntPtr.Zero, secondaryHwnd, SecondaryTaskbarClassName, null);
}
return(taskbars);
}
