private void UpdateAppBarState()
{
if (_suppressingUIToSysUpdate)
{
return;
}
var autohide = ChkAutoHide.Checked;
var alwaysOnTop = ChkAlwaysOnTop.Checked;
var abd = new WinApi.APPBARDATA();
abd.hWnd = _taskBarHwnd;
if (autohide)
{
abd.lParam = (int)(alwaysOnTop ? WinApi.ABState.ABS_AUTOHIDEANDONTOP : WinApi.ABState.ABS_AUTOHIDE);
}
else
{
abd.lParam = (int)(alwaysOnTop ? WinApi.ABState.ABS_ALWAYSONTOP : WinApi.ABState.ABS_MANUAL);
}
WinApi.SHAppBarMessage((uint)WinApi.ABMsg.ABM_SETSTATE, ref abd);
}
private static void AppBarMessage(WinApi.ABMessage message, ref WinApi.APPBARDATA appBarData)
{
WinApi.SHAppBarMessage((int)message, ref appBarData);
}
/// <summary>
/// Removes the app bar.
/// </summary>
private void Remove()
{
WinApi.APPBARDATA appBarData = this.AppBarData();
AppBarMessage(WinApi.ABMessage.ABM_REMOVE, ref appBarData);
}
/// <summary>
/// Set the position of the app bar.
/// </summary>
private void SetPos()
{
if (this.positioning)
{
this.positioning = false;
return;
}
this.positioning = true;
WinApi.APPBARDATA appBarData = this.AppBarData();
appBarData.uEdge = (uint)this.Edge;
Rect windowRect = this.windowMovement.GetWindowRect();
Rect screen = this.windowMovement.GetScreenSize();
// Request the full length of the screen, at the relevant edge.
Rect rect = screen;
if (this.Edge.IsHorizontal())
{
rect.Height = windowRect.Height;
if (this.Edge == Edge.Bottom)
{
rect.Y = screen.Bottom - windowRect.Height;
}
}
else if (this.Edge.IsVertical())
{
rect.Width = windowRect.Width;
if (this.Edge == Edge.Right)
{
rect.X = screen.Right - windowRect.Width;
}
}
// Ask for a suggested rect - Windows will adjust it to be clear of other app bars.
appBarData.rc = rect.ToRECT();
AppBarMessage(WinApi.ABMessage.ABM_QUERYPOS, ref appBarData);
// Accept the edge position, ignore the rest.
switch (this.Edge)
{
case Edge.Left:
appBarData.rc.Right = appBarData.rc.Left + (int)rect.Width;
break;
case Edge.Top:
appBarData.rc.Bottom = appBarData.rc.Top + (int)rect.Height;
break;
case Edge.Right:
appBarData.rc.Left = appBarData.rc.Right - (int)rect.Width;
break;
case Edge.Bottom:
appBarData.rc.Top = appBarData.rc.Bottom - (int)rect.Height;
break;
}
// Move the window.
this.windowMovement.NoMove = true;
this.windowMovement.SetWindowRect(appBarData.rc);
// Set the app-bar position.
AppBarMessage(WinApi.ABMessage.ABM_SETPOS, ref appBarData);
Task.Delay(500).ContinueWith(t =>
{
this.windowMovement.NoMove = false;
this.windowMovement.SetWindowRect(appBarData.rc);
});
this.positioning = false;
}