private static void SetInternal(IntPtr handle, User32.AccentState accentState, bool showBorders = false, uint tintOpacity = 0)
{
var accent = new User32.AccentPolicy
{
AccentState = accentState,
AccentFlags = (showBorders) ? User32.AccentFlags.DrawAllBorders : User32.AccentFlags.None,
GradientColor = (_defaultTintOpacity << 24) | (_defaultTintBackgroundColor & 0xFFFFFF)
};
var accentStructSize = Marshal.SizeOf(accent);
var accentPtr = Marshal.AllocHGlobal(accentStructSize);
Marshal.StructureToPtr(accent, accentPtr, false);
var data = new User32.WindowCompositionAttribData();
data.Attribute = User32.WindowCompositionAttribute.WCA_ACCENT_POLICY;
data.SizeOfData = accentStructSize;
data.Data = accentPtr;
var ret = User32.SetWindowCompositionAttribute(handle, ref data);
AppTrace.LogWarningIfFailed(ret);
Debug.Assert(ret == 0 || ret == 1);
Marshal.FreeHGlobal(accentPtr);
}
private static void EnsureWatcherThreadRunning()
{
bool needsNewThread;
lock (_lock)
{
needsNewThread = !_threadRunning;
if (needsNewThread)
{
_threadRunning = true;
}
}
if (needsNewThread)
{
new Thread(() =>
{
Thread.CurrentThread.IsBackground = true;
bool quit = false;
while (_threadRunning && !quit)
{
IntPtr[] handles;
lock (_lock)
{
handles = s_watchers.Select(w => w.Value.processHandle).ToArray();
}
var returnValue = Kernel32.WaitForMultipleObjects(handles.Length, handles, false, (int)TimeSpan.FromSeconds(5).TotalMilliseconds);
switch (returnValue)
{
case Kernel32.WAIT_ABANDONED:
case Kernel32.WAIT_FAILED:
AppTrace.LogWarningIfFailed(returnValue);
Debug.Assert(false);
break;
case Kernel32.WAIT_TIMEOUT:
// Go again
break;
default:
ProcessWatcherData data;
lock (_lock)
{
var handle = handles[returnValue];
data = s_watchers.First(w => w.Value.processHandle == handle).Value;
s_watchers.Remove(data.processId);
_threadRunning = s_watchers.Count > 0;
quit = !_threadRunning;
}
Trace.WriteLine($"ProcessWatcherService Quit: {data.processId}");
foreach (var act in data.quitActions)
{
act(data.processId);
}
Kernel32.CloseHandle(data.processHandle);
break;
}
}
}).Start();
}
}
