/// <summary>
/// Simple non-OLE drag operation.
/// Returns true if dropped, false if cancelled.
/// </summary>
/// <param name="window">Window or control that owns the drag operation.</param>
/// <param name="mouseButton">Mouse button that is used for the drag operation: Left, Right.</param>
/// <param name="onMouseKeyMessage">Callback function, called on each received mouse/key message. Optional.</param>
public static bool SimpleDragDrop(AnyWnd window, MButtons mouseButton = MButtons.Left, Action <MsgArgs> onMouseKeyMessage = null)
{
AWnd w = window.Wnd;
Api.SetCapture(w);
bool R = false;
var x = new MsgArgs();
for (; ;)
{
if (Api.GetCapture() != w)
{
return(false);
}
if (Api.GetMessage(out x.Msg) <= 0)
{
if (x.Msg.message == Api.WM_QUIT)
{
Api.PostQuitMessage((int)x.Msg.wParam);
}
break;
}
bool call = false;
int m = x.Msg.message;
if (m >= Api.WM_MOUSEFIRST && m <= Api.WM_MOUSELAST)
{
if (m == Api.WM_LBUTTONUP)
{
if (R = (mouseButton & MButtons.Left) != 0)
{
break;
}
}
else if (m == Api.WM_RBUTTONUP)
{
if (R = (mouseButton & MButtons.Right) != 0)
{
break;
}
}
call = true;
}
else if (m == Api.WM_KEYDOWN || m == Api.WM_KEYUP || m == Api.WM_SYSKEYDOWN || m == Api.WM_SYSKEYUP)
{
//on key down/up caller may want to update cursor when eg Ctrl pressed/released
if (x.Msg.wParam == (byte)KKey.Escape)
{
break;
}
call = true;
}
if (call && onMouseKeyMessage != null)
{
onMouseKeyMessage(x);
if (x._stopped)
{
break;
}
if (x.Cursor != null)
{
Api.SetCursor(x.Cursor.Handle);
x.Cursor = null;
}
}
Api.DispatchMessage(x.Msg);
}
Api.ReleaseCapture();
return(R);
}
/// <summary>
/// Waits while some modifier keys (Ctrl, Shift, Alt, Win) or mouse buttons are pressed.
/// </summary>
/// <param name="secondsTimeout">Timeout, seconds. Can be 0 (infinite), >0 (exception) or <0 (no exception). More info: [](xref:wait_timeout).</param>
/// <param name="mod">Check only these keys. Default: all.</param>
/// <param name="buttons">Check only these buttons. Default: all.</param>
/// <returns>Returns true. On timeout returns false if <i>secondsTimeout</i> is negative; else exception.</returns>
/// <exception cref="TimeoutException"><i>secondsTimeout</i> time has expired (if > 0).</exception>
/// <seealso cref="isMod"/>
/// <seealso cref="mouse.isPressed"/>
/// <seealso cref="mouse.waitForNoButtonsPressed"/>
public static bool waitForNoModifierKeysAndMouseButtons(double secondsTimeout = 0.0, KMod mod = KMod.Ctrl | KMod.Shift | KMod.Alt | KMod.Win, MButtons buttons = MButtons.Left | MButtons.Right | MButtons.Middle | MButtons.X1 | MButtons.X2)
{
var to = new wait.Loop(secondsTimeout, new OWait(period: 2));
for (; ;)
{
if (!isMod(mod) && !mouse.isPressed(buttons))
{
return(true);
}
if (!to.Sleep())
{
return(false);
}
}
}
