Problem with setMovableByWindowBackground:NO about inappstorewindow HOT 2 CLOSED

- (void)mouseDragged:(NSEvent *)theEvent
{
    NSWindow *window = [self window];
    NSPoint where =  [window convertBaseToScreen:[theEvent locationInWindow]];
    NSPoint origin = [window frame].origin;
    // Now we loop handling mouse events until we get a mouse up event.
    while ((theEvent = [NSApp nextEventMatchingMask:NSLeftMouseDownMask|NSLeftMouseDraggedMask|NSLeftMouseUpMask untilDate:[NSDate distantFuture] inMode:NSEventTrackingRunLoopMode dequeue:YES])&&([theEvent type]!=NSLeftMouseUp)) {
        // Set up a local autorelease pool for the loop to prevent buildup of temporary objects.
        @autoreleasepool {
            NSPoint now = [window convertBaseToScreen:[theEvent locationInWindow]];
            origin.x += now.x-where.x;
            origin.y += now.y-where.y;
            // Move the window by the mouse displacement since the last event.
            [window setFrameOrigin:origin];
            where = now;
        }
    }
}