private static IntPtr MessageCallback(int nCode, IntPtr wParam, ref WinApi.MSG lParam)
{
if (nCode == 0 && lParam.message == WinApi.WM_DROPFILES)
{
IntPtr hDrop = lParam.wParam;
uint num = WinApi.DragQueryFile(hDrop, 0xFFFFFFFF, null, 0);
string[] files = new string[num];
uint bufferSize = 1024;
StringBuilder path = new StringBuilder((int)bufferSize);
for (uint i = 0; i < num; i++)
{
//uint size = WinApi.DragQueryFile(hDrop, i, path, bufferSize);
WinApi.DragQueryFile(hDrop, i, path, bufferSize);
files[i] = path.ToString();
path.Length = 0;
}
WinApi.DragFinish(hDrop);
IntPtr hwnd = lParam.hwnd;
if (hwnd != IntPtr.Zero)
{
int instanceCount = 0;
// 存在するインスタンス内を検索
foreach (UniWinApi uniwin in instances)
{
// 該当するウィンドウであった場合
if (uniwin.hWnd == hwnd)
{
// ファイルドロップ時のイベントを実行
if (uniwin.OnFilesDropped != null)
{
uniwin.OnFilesDropped(files);
}
instanceCount++;
}
}
// もしインスタンスが見つからなければおかしいのでログ出力
if (instanceCount < 1)
{
Debug.Log("File dropped, but no UniWinApi instances were found.");
}
}
}
return(WinApi.CallNextHookEx(IntPtr.Zero, nCode, wParam, ref lParam));
}
protected override bool HandleHookEvent(IntPtr wParam, IntPtr lParam)
{
WinApi.MSG nc = (WinApi.MSG)Marshal.PtrToStructure(lParam, typeof(WinApi.MSG));
if (GetMessage == null)
{
return(false);
}
if (_messagesToIntercept.Contains(nc.message))
{
bool handled;
GetMessage(nc, out handled);
return(handled);
}
return(false);
}
public override int Wait(IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
{
if (!_pumpMessages)
{
return(WaitHelper(waitHandles, waitAll, millisecondsTimeout));
}
if (waitHandles == null || (uint)waitHandles.Length is var count && count == 0)
{
throw new ArgumentNullException();
}
var timeout = millisecondsTimeout;
// wait for all?
if (waitAll && count > 1)
{
// more: https://tinyurl.com/Apartments-and-Pumping, search for "mutex"
throw new NotSupportedException("WaitAll for multiple handles on a STA thread is not supported.");
}
else
{
// optimization: a quick check with a zero timeout
var nativeResult = WinApi.WaitForMultipleObjects(
count, waitHandles,
bWaitAll: false, dwMilliseconds: 0);
if (IsNativeWaitSuccessful(count, nativeResult, out var managedResult))
{
return(managedResult);
}
// proceed to pumping
// track timeout if not infinite
var startTickCount = Environment.TickCount;
var remainingTimeout = (int)timeout;
// the core loop
var msg = new WinApi.MSG();
while (true)
{
// MsgWaitForMultipleObjectsEx with MWMO_INPUTAVAILABLE returns,
// even if there's a message already seen but not removed in the message queue
nativeResult = WinApi.MsgWaitForMultipleObjectsEx(
count, waitHandles,
(uint)remainingTimeout,
WinApi.QS_ALLINPUT,
WinApi.MWMO_INPUTAVAILABLE);
if (IsNativeWaitSuccessful(count, nativeResult, out managedResult) ||
managedResult == WaitHandle.WaitTimeout)
{
return(managedResult);
}
// there is a message, pump and dispatch it
if (WinApi.PeekMessage(out msg, IntPtr.Zero, 0, 0, WinApi.PM_REMOVE))
{
WinApi.TranslateMessage(ref msg);
WinApi.DispatchMessage(ref msg);
}
// check the timeout
if (remainingTimeout != Timeout.Infinite)
{
// Environment.TickCount is expected to wrap correctly even when runs continuously
var lapse = unchecked (Environment.TickCount - startTickCount);
remainingTimeout = Math.Max(timeout - lapse, 0);
if (remainingTimeout <= 0)
{
return(WaitHandle.WaitTimeout);
}
}
}
}
}
