Awesome Text Fields in MacRuby

PaddedTextFieldCell.rb

class PaddedTextFieldCell < NSTextFieldCell
    
    def drawingRectForBounds(cellFrame)
        super
        result = cellFrame
        padding_left = (result.size.width / 16).round # to make sure text is clear
        padding_top = (result.size.height / 4).round

        result.origin.x += padding_left
        result.origin.y += padding_top
        
        result.size.width -= (padding_left * 2)
        result.size.height -= (padding_top * 2)
        
        return result
    end
    
    def titleRectForBounds(cellRect)
        result = cellRect
        
        padding_left = (result.size.width / 16).round
        padding_top = (result.size.height / 4).round

        result.origin.x += padding_left
        result.origin.y += padding_top
        
        result.size.width -= (padding_left * 2)
        result.size.height -= (padding_top * 2)

        return result
    end
    
    def editWithFrame(aRect, inView:controlView, editor:textObj, delegate:anObject, event:theEvent)
        textFrame = self.titleRectForBounds(aRect)
        super
    end
    
    def selectWithFrame(aRect, inView:controlView, editor:textObj, delegate:anObject, start:selStart, length:selLength)
        textFrame = self.titleRectForBounds(aRect)
        super
    end
    
    def drawsBackground
        false
    end
    
    
end

SexyTextField.rb

class SextTextField < NSTextField

    def drawRect(frame)
        
        # Step 1. Draw a rectangle.
        rect = NSMakeRect(0.0, 0.0, frame.size.width, frame.size.height - 1.0)
        path = NSBezierPath.bezierPathWithRoundedRect(rect, xRadius:3.0, yRadius:3.0)
        
        # Step 2. Add a shadow.
        dropShadow = NSShadow.alloc.initWithColor(NSColor.colorWithCalibratedWhite(1.0, alpha:0.35), offset:NSMakeSize(0.0, -1.0), blurRadius:0.0)        
        NSGraphicsContext.saveGraphicsState
            dropShadow.set
            path.fill
        NSGraphicsContext.restoreGraphicsState

        # Step 3. Background gradient!
        gradient = NSGradient.alloc.initWithStartingColor(NSColor.colorWithCalibratedWhite(0.506, alpha:1.0), endingColor:NSColor.colorWithCalibratedWhite(0.376, alpha:1.0))
        gradient.drawInBezierPath(path, angle:-90)

        # Step 4. Stroke.
        strokeColor = NSColor.colorWithCalibratedWhite(0.26, alpha:1.0)
        strokeColor.setStroke
        path.strokeInside
        
        # Step 5. Inner shadows.
        innerShadow1 = NSShadow.alloc.initWithColor(NSColor.colorWithCalibratedWhite(0.0, alpha:0.75), offset:NSZeroSize, blurRadius:3.0)
        innerShadow2 = NSShadow.alloc.initWithColor(NSColor.colorWithCalibratedWhite(0.0, alpha:0.55), offset:NSMakeSize(0.0, -2.0), blurRadius:8.0)
        path.fillWithInnerShadow(innerShadow1)
        path.fillWithInnerShadow(innerShadow2)

        super

    end
    
end

This is a useful reference for customizing an NSTextfield (and it's contained NSTextField Cell). The former is necessary for drawing custom gradients & bezels and whatnot, while the latter is necessary to adding the all-important padding.