Desktop Notifications for MacRuby

MRNotificaiton.rb

#
#  MRNotification.rb
#
#  Created by Daniel Westendorf on 12/8/11.
#  MIT Licensed, use as you wish as-is.


framework 'Cocoa'

class MRNotifier
  
  def initialize(d_options={})
    options = {:width => 275, :height => 100, :spacing => 20}
    options.merge!(d_options)
    @panels = []
    @width = options[:width]; @height = options[:height]; @spacing = options[:spacing]
  end
  
  def add_notification(passed_options={})
    default_options = {:title => '', :ttl => 10, :message => ''}
    options = default_options.merge(passed_options)
    
    rect = self.get_rect
    
    panel = NSPanel.alloc.initWithContentRect(rect,
                                              styleMask:NSTitledWindowMask | NSClosableWindowMask | NSUtilityWindowMask |NSHUDWindowMask,
                                              backing:NSBackingStoreBuffered,
                                              defer:false)
    
    #set the content
    if options[:image]
      options[:image].setSize(NSSize.new(50,50))
      total_frame = panel.contentView.frame
      text_frame = [total_frame.origin.x + 55, total_frame.origin.y, total_frame.size.width - 55, total_frame.size.height - 5]
      img_view = NSImageView.alloc.init.setImage(options[:image])

      panel.contentView.addSubview(img_view)
      panel.contentView.subviews[0].setFrame([total_frame.origin.x + 5, total_frame.size.height - 60, 50, 50])
    else
      total_frame = panel.contentView.frame
      text_frame = NSRect.new([total_frame.origin.x + 5, total_frame.origin.y - 5], [total_frame.size.width - 10, total_frame.size.height - 10])
    end
    panel.setTitle(options[:title])
    
    text = NSTextView.alloc.initWithFrame(text_frame)
    text.setDrawsBackground(false)
    text.setFont(NSFont.userFontOfSize(13))
    text.setTextColor(NSColor.lightGrayColor)
    text.setString(options[:message])
   
    panel.contentView.addSubview(text)
    
    #panel settings
    panel.setHidesOnDeactivate(false)
    panel.setReleasedWhenClosed(true)
    panel.orderFrontRegardless
    panel.setMovable(false)
    @panels << panel
    NSTimer.scheduledTimerWithTimeInterval(options[:ttl], target: self, selector:"remove_panel:", userInfo:panel, repeats:false)
    NSNotificationCenter.defaultCenter.addObserver(self, selector:'notification_closed:', name:NSWindowWillCloseNotification, object: panel)
    panel.display
  end
  
  def notification_closed(notification)
    @panels.delete(notification.object)    
  end
  
  def get_rect
    screen = NSScreen.screens[0].visibleFrame
    
    base_x = screen.size.width - @width - @spacing
    base_y = screen.size.height - @height
    
    x = base_x
    y = base_y
    
    unless @panels.length < 1
      origins = @panels.collect {|panel| [panel.frame.origin.x, panel.frame.origin.y]}
      while origins.include?([x,y])
        if ((y - @height - @spacing * 2) > screen.origin.y)
          y -= (@height + @spacing * 2)
          else
          y = base_y
          x -= (@width + @spacing)
        end
      end
    end
    
    return [x, y, @width, @height]
    
  end
  
  def remove_panel(timer)
    @panels.delete(timer.userInfo)
    timer.userInfo.close
  end
  
end

#usage

#Create the notifier queue. Accepts hash of options
# :width == Width of notifications default: 275
# :height == Height of notifications default: 100 (Images have a fixed height of 50, go lower, you will not)
# :spacing == Spacing between new notifications default: 20

notification_queue = MRNotifier.new({:height => 120, :width => 50, :spacing 50})

#Publish a notification. Accepts hash of options
# :title == string title of window default: blank
# :ttl == time the notification should stay on screen in seconds default: 10
# :message == meat of the notification, human word glob representation of your notification default: blank
# :image == NSImage that you want displayed in your notification default: none

notification_queue.add_notification({:title => "DANGER WILL ROBINSON!", :message => "If it burns when you pee, you may have the clap", :ttl => 5, :image => NSImage.imageNamed('my_app_icon.png'})