public Taskbar()
{
IntPtr taskbarHandle = PInvoke.FindWindow(Taskbar.ClassName, null);
var data = new APPBARDATA
{
cbSize = (uint) Marshal.SizeOf(typeof (APPBARDATA)),
hWnd = taskbarHandle
};
IntPtr result = PInvoke.SHAppBarMessage(AppBarMessages.GetTaskbarPos, ref data);
if (result == IntPtr.Zero)
throw new InvalidOperationException();
this.Position = (TaskbarPosition) data.uEdge;
this.Bounds = Rectangle.FromLTRB(data.rc.Left, data.rc.Top, data.rc.Right, data.rc.Bottom);
data.cbSize = (uint) Marshal.SizeOf(typeof (APPBARDATA));
result = PInvoke.SHAppBarMessage(AppBarMessages.GetState, ref data);
int state = result.ToInt32();
this.AlwaysOnTop = (state & AppBarState.AlwaysOnTop) == AppBarState.AlwaysOnTop;
this.AutoHide = (state & AppBarState.Autohide) == AppBarState.Autohide;
}
private void UnRegisterAppBar()
{
Log.Info("UnRegisterAppBar called");
if (getWindowState() != WindowStates.Docked) return;
var abd = new APPBARDATA();
abd.cbSize = Marshal.SizeOf(abd);
abd.hWnd = windowHandle;
PInvoke.SHAppBarMessage(AppBarMessages.Remove, ref abd);
appBarCallBackId = -1;
}
private void SetAppBarSizeAndPosition(DockEdges dockPosition, Rect sizeAndPosition, bool isInitialising = false)
{
Log.InfoFormat("SetAppBarSizeAndPosition called with dockPosition:{0}, sizeAndPosition.Top:{1}, sizeAndPosition.Bottom:{2}, sizeAndPosition.Left:{3}, sizeAndPosition.Right:{4}",
dockPosition, sizeAndPosition.Top, sizeAndPosition.Bottom, sizeAndPosition.Left, sizeAndPosition.Right);
Log.InfoFormat("Screen bounds in px - Top:{0}, Left:{1}, Width:{2}, Height:{3}", screenBoundsInPx.Top, screenBoundsInPx.Left, screenBoundsInPx.Width, screenBoundsInPx.Height);
if (getWindowState() != WindowStates.Docked) return;
var barData = new APPBARDATA();
barData.cbSize = Marshal.SizeOf(barData);
barData.hWnd = windowHandle;
barData.uEdge = dockPosition.ToAppBarEdge();
barData.rc.Left = (int)Math.Round(sizeAndPosition.Left);
barData.rc.Top = (int)Math.Round(sizeAndPosition.Top);
barData.rc.Right = (int)Math.Round(sizeAndPosition.Right);
barData.rc.Bottom = (int)Math.Round(sizeAndPosition.Bottom);
//Submit a query for the proposed dock size and position, which might be updated
PInvoke.SHAppBarMessage(AppBarMessages.QueryPos, ref barData);
Log.InfoFormat("QueryPos returned barData.rc.Top:{0}, barData.rc.Bottom:{1}, barData.rc.Left:{2}, barData.rc.Right:{3}",
barData.rc.Top, barData.rc.Bottom, barData.rc.Left, barData.rc.Right);
//Compensate for lost thickness due to other app bars
switch (dockPosition)
{
case DockEdges.Top:
barData.rc.Bottom += barData.rc.Top - (int) Math.Round(sizeAndPosition.Top);
break;
case DockEdges.Bottom:
barData.rc.Top -= (int)Math.Round(sizeAndPosition.Bottom) - barData.rc.Bottom;
break;
case DockEdges.Left:
barData.rc.Right += barData.rc.Left - (int)Math.Round(sizeAndPosition.Left);
break;
case DockEdges.Right:
barData.rc.Left -= (int)Math.Round(sizeAndPosition.Right) - barData.rc.Right;
break;
}
Log.InfoFormat("Rect values adjusted (to compensate for other app bars) to barData.rc.Top:{0}, barData.rc.Bottom:{1}, barData.rc.Left:{2}, barData.rc.Right:{3}",
barData.rc.Top, barData.rc.Bottom, barData.rc.Left, barData.rc.Right);
//Then set the dock size and position, using the potentially updated barData
PInvoke.SHAppBarMessage(AppBarMessages.SetPos, ref barData);
Log.InfoFormat("SetPos returned barData.rc.Top:{0}, barData.rc.Bottom:{1}, barData.rc.Left:{2}, barData.rc.Right:{3}",
barData.rc.Top, barData.rc.Bottom, barData.rc.Left, barData.rc.Right);
var finalDockLeftInDp = barData.rc.Left/Graphics.DipScalingFactorX;
var finalDockTopInDp = barData.rc.Top / Graphics.DipScalingFactorY;
var finalDockWidthInDp = (barData.rc.Right - barData.rc.Left) / Graphics.DipScalingFactorX;
var finalDockHeightInDp = (barData.rc.Bottom - barData.rc.Top) / Graphics.DipScalingFactorY;
Log.InfoFormat("finalDockLeftInDp:{0}, finalDockTopInDp:{1}, finalDockWidthInDp:{2}, finalDockHeightInDp:{3}", finalDockLeftInDp, finalDockTopInDp, finalDockWidthInDp, finalDockHeightInDp);
Log.InfoFormat("Screen bounds in dp - Top:{0}, Left:{1}, Width:{2}, Height:{3}", screenBoundsInDp.Top, screenBoundsInDp.Left, screenBoundsInDp.Width, screenBoundsInDp.Height);
if (finalDockLeftInDp < 0 ||
finalDockTopInDp < 0 ||
finalDockWidthInDp <= 0 ||
finalDockHeightInDp <= 0 ||
(finalDockLeftInDp + finalDockWidthInDp) > screenBoundsInDp.Right ||
(finalDockTopInDp + finalDockHeightInDp) > screenBoundsInDp.Bottom)
{
Log.Error("Final dock size and/or position is invalid - reverting to floating size and position");
UnRegisterAppBar();
saveWindowState(WindowStates.Floating);
savePreviousWindowState(WindowStates.Floating);
PublishError(this, new ApplicationException("There was a problem positioning OptiKey - reverting to floating position"));
}
else if (!isInitialising)
{
//Apply final size and position to the window. This is dispatched with ApplicationIdle priority
//as WPF will send a resize after a new appbar is added. We need to apply the received size & position after this happens.
//RECT values are in pixels so I need to scale back to DIPs for WPF.
var rect = new Rect(finalDockLeftInDp, finalDockTopInDp, finalDockWidthInDp, finalDockHeightInDp);
window.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, new ApplySizeAndPositionDelegate(ApplyAndPersistSizeAndPosition), rect);
}
}
private void RegisterAppBar()
{
Log.Info("RegisterAppBar called");
if (getWindowState() != WindowStates.Docked) return;
//Register a new app bar with Windows - this adds it to a list of app bars
var abd = new APPBARDATA();
abd.cbSize = Marshal.SizeOf(abd);
abd.hWnd = windowHandle;
appBarCallBackId = PInvoke.RegisterWindowMessage("AppBarMessage"); //Get a system wide unique window message (id)
abd.uCallbackMessage = appBarCallBackId;
var result = PInvoke.SHAppBarMessage((int)AppBarMessages.New, ref abd);
//Add hook to receive position change messages from Windows
HwndSource source = HwndSource.FromHwnd(abd.hWnd);
source.AddHook(AppBarPositionChangeCallback);
}
public static extern IntPtr SHAppBarMessage(AppBarMessages dwMessage, ref APPBARDATA pData);
private void SetAppBarSizeAndPosition(DockEdges dockPosition, Rect sizeAndPosition)
{
if (getWindowState() != WindowStates.Docked) return;
var barData = new APPBARDATA();
barData.cbSize = Marshal.SizeOf(barData);
barData.hWnd = windowHandle;
barData.uEdge = dockPosition.ToAppBarEdge();
barData.rc.Left = (int)Math.Round(sizeAndPosition.Left);
barData.rc.Top = (int)Math.Round(sizeAndPosition.Top);
barData.rc.Right = (int)Math.Round(sizeAndPosition.Right);
barData.rc.Bottom = (int)Math.Round(sizeAndPosition.Bottom);
//Submit a query for the proposed dock size and position, which might be updated
PInvoke.SHAppBarMessage(AppBarMessages.QueryPos, ref barData);
//Compensate for lost thickness due to other app bars
switch (dockPosition)
{
case DockEdges.Top:
barData.rc.Bottom += barData.rc.Top - (int) Math.Round(sizeAndPosition.Top);
break;
case DockEdges.Bottom:
barData.rc.Top -= (int)Math.Round(sizeAndPosition.Bottom) - barData.rc.Bottom;
break;
case DockEdges.Left:
barData.rc.Right += barData.rc.Left - (int)Math.Round(sizeAndPosition.Left);
break;
case DockEdges.Right:
barData.rc.Left -= (int)Math.Round(sizeAndPosition.Right) - barData.rc.Right;
break;
}
//Then set the dock size and position, using the potentially updated barData
PInvoke.SHAppBarMessage(AppBarMessages.SetPos, ref barData);
//Extract the final size and position and apply to the window. This is dispatched with ApplicationIdle priority
//as WPF will send a resize after a new appbar is added. We need to apply the received size & position after this happens.
//RECT values are in pixels so I need to scale back to DIPs for WPF.
var rect = new Rect(
barData.rc.Left / Graphics.DipScalingFactorX,
barData.rc.Top / Graphics.DipScalingFactorY,
(barData.rc.Right - barData.rc.Left) / Graphics.DipScalingFactorX,
(barData.rc.Bottom - barData.rc.Top) / Graphics.DipScalingFactorY);
window.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, new ApplySizeAndPositionDelegate(ApplyAndPersistSizeAndPosition), rect);
}
