Verified (see misctestprogs) that WM_GETMINMAXINFO *is* sufficient to constrain the container size during SetWindowPos(), even if the size doesn't change. More TODOs.

TODO.md

@@ -1,3 +1,5 @@
+- windows: document the minimum size change propagation system
+
 - provisions for controls that cannot be grown? especiailly for windows
 
 - LC_VERSION_MIN_MACOSX has the 10.11 SDK; see if we can knock it down to 10.7 too; OS version is fine

windows/container.cpp

@@ -39,7 +39,6 @@ static LRESULT CALLBACK containerWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LP
 		c = (uiWindowsControl *) GetWindowLongPtrW(hwnd, 0);
 		(*(onResize))(data);
 		return 0;
-	// TODO is this sufficient for SetWindowPos()?
 	case WM_GETMINMAXINFO:
 		lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
 		c = (uiWindowsControl *) GetWindowLongPtrW(hwnd, 0);