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    <p>I recommend subclassing the NSScroller and override <code>– drawArrow:highlight:</code> / <code>– drawKnobSlotInRect:highlight:</code> / <code>– drawKnob</code> methods so you have a stable scroller appearance.</p> <p>P.S. Don't forget to set your new scroller class in XIB-file for the scrollers.</p> <p><strong>UPDATE</strong></p> <p>Here is the sample code:</p> <pre><code>- (void)drawKnob { // call the default implementation for Overlay Scrollers if (self.scrollerStyle == NSScrollerStyleOverlay) { [super drawKnob]; return; } if (_style == NSScrollerKnobStyleLight || _style == NSScrollerKnobStyleDefault) [[NSColor colorWithCalibratedWhite:1.0 alpha:0.8] setFill]; else [[NSColor colorWithCalibratedWhite:0 alpha:0.4] setFill]; // Note: you can specify the rect with fixed width here NSRect knobRect = [self rectForPart:NSScrollerKnob]; // VERTICAL SCROLLER NSInteger fullWidth = knobRect.size.width; knobRect.size.width = round(knobRect.size.width/2); knobRect.origin.x += (NSInteger)((fullWidth - knobRect.size.width)/2); // draw... NSBezierPath * thePath = [NSBezierPath bezierPath]; [thePath appendBezierPathWithRoundedRect:knobRect xRadius:4 yRadius:4]; [thePath fill]; } //--------------------------------------------------------------- - (void)drawKnobSlotInRect:(NSRect)slotRect highlight:(BOOL)flag { // call the default implementation for Overlay Scrollers // draw nothing for usual if (self.scrollerStyle == NSScrollerStyleOverlay) { [super drawKnobSlotInRect:slotRect highlight:flag]; } } //--------------------------------------------------------------- - (void)drawArrow:(NSScrollerArrow)whichArrow highlight:(BOOL)flag { // call the default implementation for Overlay Scrollers // draw nothing for usual if (self.scrollerStyle == NSScrollerStyleOverlay) { [super drawArrow:whichArrow highlight:flag]; } } </code></pre>
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    1. POHow to disable the mouse hover expand effect on a NSTextView's NSScrollView scroller?
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    1. POHow to disable the mouse hover expand effect on a NSTextView's NSScrollView scroller?
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    1. COcould you please be more specific on what to do inside those methods? I've played around with those methods and I kinda got it, but the scroller just wouldn't hide after leaving (mouse) the scroller
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      1. USPedro Vieira
    2. COI updated my answer with the sample code. Yes, non-overlay scrollers don't hide, but always present. If you want to simulate the iOS scrollers behavior maybe you should look for something like https://github.com/rheinfabrik/RFOverlayScrollView
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