- (IBAction) refresh:(id)sender
{
    float scaleFactor = 0.1;
    
    NSRect screenRect = [[NSScreen mainScreen] frame];
    NSImage *screenImg = [[NSImage alloc] initWithSize:NSMakeSize(screenRect.size.width, screenRect.size.height)];
    [screenImg setScalesWhenResized:YES];
    NSWindow *win = [[NSWindow alloc] initWithContentRect:screenRect
                                                   styleMask:NSBorderlessWindowMask backing:NSBackingStoreNonretained
                                                       defer:NO];
    NSView *myView = [[NSView alloc] initWithFrame:screenRect];
    [win setLevel:NSScreenSaverWindowLevel + 100];
    [win setHasShadow:NO];
    [win setAlphaValue:0.0];
    [win setContentView:myView];
    [win orderFront:self];
    [myView lockFocus];
    NSBitmapImageRep *screenRep= [[NSBitmapImageRep alloc] initWithFocusedViewRect:screenRect];
    [screenImg addRepresentation:screenRep];
    [myView unlockFocus];
    [win orderOut:self];
    [win close];
    
    NSImage *scaledImage = [[NSImage alloc] initWithSize:NSMakeSize([screenImg size].width * scaleFactor, [screenImg size].height * scaleFactor)];
    [scaledImage lockFocus];
    [screenImg drawInRect:NSMakeRect(0,0,[scaledImage size].width,[scaledImage size].height)
                 fromRect:NSMakeRect(0,0,[screenImg size].width,[screenImg size].height)
                operation:NSCompositeCopy fraction:1.0];
    [scaledImage unlockFocus];
    
    //###
    
    [imgView setFrame:NSMakeRect([imgView frame].origin.x, [imgView frame].origin.y, [scaledImage size].width, [scaledImage size].height)];
    [imgView setImage:scaledImage];
    [imgView scrollRectToVisible:NSMakeRect([imgView frame].origin.x, [imgView frame].origin.y + [imgView frame].size.height, 1, 1)];
}