DZone Snippets: Aptiva's Code Snippets

How to draw your own table header... (with borders)

aptiva (FjÃ¶lnir Ã?sgeirsson) — Sat, 28 Apr 2007 19:48:47 GMT

// It's a bit hacky at the beginning, but nstableheadercell wasn't exactly making things easy for me



- (void)_drawThemeContents:(NSRect)cellFrame highlighted:(BOOL)highlighted inView:(NSTableHeaderView *)view;

{

	int index = [view columnAtPoint:NSMakePoint(cellFrame.origin.x + 1,cellFrame.origin.y + 1)];

	NSRect headerRect;

	if(index != -1)

		headerRect = [view headerRectOfColumn:index];

	else

		headerRect = NSZeroRect;

	

	[headerImage drawInRect:cellFrame

				   fromRect:NSZeroRect

				  operation:NSCompositeSourceOver

				   fraction:1.0];

	

	[[NSColor colorWithCalibratedRed:207.0/255.0

							   green:207.0/255.0

								blue:207.0/255.0

							   alpha:1.0] set];

	NSRectFill(NSMakeRect(headerRect.origin.x, headerRect.origin.y + 1, headerRect.size.width, headerRect.size.height - 2));

	[headerImage drawInRect:NSMakeRect(headerRect.origin.x, headerRect.origin.y, headerRect.size.width - 1, headerRect.size.height)

				   fromRect:NSZeroRect

				  operation:NSCompositeSourceOver

				   fraction:1.0];

}

How to make the system notify you of audio cd insertion

aptiva (FjÃ¶lnir Ã?sgeirsson) — Mon, 23 Apr 2007 12:05:23 GMT

// Uses the DiskArbitration framework to notify ya of when new audio cds are inserted



NSDictionary *match = [NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:@"IOCDMedia", [NSNumber numberWithBool:YES], nil] forKeys:[NSArray arrayWithObjects:(NSString *)kDADiskDescriptionMediaKindKey, kDADiskDescriptionMediaWholeKey, nil]];

		

_session = DASessionCreate(kCFAllocatorDefault);

DASessionScheduleWithRunLoop(_session, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);

DARegisterDiskAppearedCallback(_session, (CFDictionaryRef)match, diskAppearedCallback, NULL);

DARegisterDiskDisappearedCallback(_session, (CFDictionaryRef)match, diskDisappearedCallback, NULL);

Genres defined in ID3v2 and Winamp extensions

aptiva (FjÃ¶lnir Ã?sgeirsson) — Mon, 02 Apr 2007 22:25:42 GMT

Why oh why not just store strings?



NSMutableArray *genres = [NSMutableArray array];

[genres addObject:@"Blues"];

[genres addObject:@"Classic Rock"];

[genres addObject:@"Country"];

[genres addObject:@"Dance"];

[genres addObject:@"Disco"];

[genres addObject:@"Funk"];

[genres addObject:@"Grunge"];

[genres addObject:@"Hip-Hop"];

[genres addObject:@"Jazz"];

[genres addObject:@"Metal"];

[genres addObject:@"New Age"];

[genres addObject:@"Oldies"];

[genres addObject:@"Other"];

[genres addObject:@"Pop"];

[genres addObject:@"R&B"];

[genres addObject:@"Rap"];

[genres addObject:@"Reggae"];

[genres addObject:@"Rock"];

[genres addObject:@"Techno"];

[genres addObject:@"Industrial"];

[genres addObject:@"Alternative"];

[genres addObject:@"Ska"];

[genres addObject:@"Death Metal"];

[genres addObject:@"Pranks"];

[genres addObject:@"Soundtrack"];

[genres addObject:@"Euro-Techno"];

[genres addObject:@"Ambient"];

[genres addObject:@"Trip-Hop"];

[genres addObject:@"Vocal"];

[genres addObject:@"Jazz+Funk"];

[genres addObject:@"Fusion"];

[genres addObject:@"Trance"];

[genres addObject:@"Classical"];

[genres addObject:@"Instrumental"];

[genres addObject:@"Acid"];

[genres addObject:@"House"];

[genres addObject:@"Game"];

[genres addObject:@"Sound Clip"];

[genres addObject:@"Gospel"];

[genres addObject:@"Noise"];

[genres addObject:@"AlternRock"];

[genres addObject:@"Bass"];

[genres addObject:@"Soul"];

[genres addObject:@"Punk"];

[genres addObject:@"Space"];

[genres addObject:@"Meditative"];

[genres addObject:@"Instrumental Pop"];

[genres addObject:@"Instrumental Rock"];

[genres addObject:@"Ethnic"];

[genres addObject:@"Gothic"];

[genres addObject:@"Darkwave"];

[genres addObject:@"Techno-Industrial"];

[genres addObject:@"Electronic"];

[genres addObject:@"Pop-Folk"];

[genres addObject:@"Eurodance"];

[genres addObject:@"Dream"];

[genres addObject:@"Southern Rock"];

[genres addObject:@"Comedy"];

[genres addObject:@"Cult"];

[genres addObject:@"Gangsta"];

[genres addObject:@"Top 40"];

[genres addObject:@"Christian Rap"];

[genres addObject:@"Pop/Funk"];

[genres addObject:@"Jungle"];

[genres addObject:@"Native American"];

[genres addObject:@"Cabaret"];

[genres addObject:@"New Wave"];

[genres addObject:@"Psychadelic"];

[genres addObject:@"Rave"];

[genres addObject:@"Showtunes"];

[genres addObject:@"Trailer"];

[genres addObject:@"Lo-Fi"];

[genres addObject:@"Tribal"];

[genres addObject:@"Acid Punk"];

[genres addObject:@"Acid Jazz"];

[genres addObject:@"Polka"];

[genres addObject:@"Retro"];

[genres addObject:@"Musical"];

[genres addObject:@"Rock & Roll"];

[genres addObject:@"Hard Rock"];

[genres addObject:@"Folk"];

[genres addObject:@"Folk-Rock"];

[genres addObject:@"National Folk"];

[genres addObject:@"Swing"];

[genres addObject:@"Fast Fusion"];

[genres addObject:@"Bebob"];

[genres addObject:@"Latin"];

[genres addObject:@"Revival"];

[genres addObject:@"Celtic"];

[genres addObject:@"Bluegrass"];

[genres addObject:@"Avantgarde"];

[genres addObject:@"Gothic Rock"];

[genres addObject:@"Progressive Rock"];

[genres addObject:@"Psychedelic Rock"];

[genres addObject:@"Symphonic Rock"];

[genres addObject:@"Slow Rock"];

[genres addObject:@"Big Band"];

[genres addObject:@"Chorus"];

[genres addObject:@"Easy Listening"];

[genres addObject:@"Acoustic"];

[genres addObject:@"Humour"];

[genres addObject:@"Speech"];

[genres addObject:@"Chanson"];

[genres addObject:@"Opera"];

[genres addObject:@"Chamber Music"];

[genres addObject:@"Sonata"];

[genres addObject:@"Symphony"];

[genres addObject:@"Booty Bass"];

[genres addObject:@"Primus"];

[genres addObject:@"Porn Groove"];

[genres addObject:@"Satire"];

[genres addObject:@"Slow Jam"];

[genres addObject:@"Club"];

[genres addObject:@"Tango"];

[genres addObject:@"Samba"];

[genres addObject:@"Folklore"];

[genres addObject:@"Ballad"];

[genres addObject:@"Power Ballad"];

[genres addObject:@"Rhythmic Soul"];

[genres addObject:@"Freestyle"];

[genres addObject:@"Duet"];

[genres addObject:@"Punk Rock"];

[genres addObject:@"Drum Solo"];

[genres addObject:@"A capella"];

[genres addObject:@"Euro-House"];

[genres addObject:@"Dance Hall"];

Matrix rotator

aptiva (FjÃ¶lnir Ã?sgeirsson) — Fri, 02 Feb 2007 01:07:05 GMT

This method rotates a matrix
Example output:
~/Desktop% ruby rotate.rb
normal
12345
00000
fooba
rotated left
50a
40b
30o
20o
10f
rotated right
f01
o02
o03
b04
a05



def rotateMatrix(matrix, direction)

  # - You must Rotate the matrix neo!

  oldMap = matrix



  # Get the number of lines in the old map (they're the new columns)

  lineCount = oldMap.size

  # Get the number of columns in the old map (We have that many rows now)

  columnCount = oldMap[0].size

  @map = []

  columnCount.times { @map.push [] }



  # Loop through every line in the old map, retrieve the appropriate column

  # and make a horizontal column with it's contents

  # we'll take one (old)line at a time and rotate it.

  onLine = 0

  oldMap.each do |oldLine|

    onColumn = 0

    oldLine.each do

      case direction

      when :right

        @map[(columnCount - 1) - onColumn][(lineCount - 1) - onLine] = oldLine[(columnCount - 1) - onColumn]

      when :left

        @map[onColumn][onLine] = oldLine[(columnCount - 1) - onColumn]

      end

      onColumn += 1

    end

    onLine += 1

  end

  @map

end



def rotateRight(matrix)

  rotateMatrix(matrix, :right)

end



def rotateLeft(matrix)

  rotateMatrix(matrix, :left)

end

Alphabetical sorter

aptiva (FjÃ¶lnir Ã?sgeirsson) — Sat, 23 Sep 2006 19:15:44 GMT

// This function sorts an array of objects that include this code, alphabetically
// That's nothing new, except this sorts strings starting with a number correctly!



  # ---

  # Sorting

  # ---

def <=>(other)

    regex = /^[\d]+/

    if self.title =~ regex

      our_num = Regexp.last_match[0].to_i

      if other.title =~ regex

        other_num = Regexp.last_match[0].to_i

        return our_num <=> other_num

      end

    end

    self.title <=> other.title

  end

File icon giver/getter/whatever

aptiva (FjÃ¶lnir Ã?sgeirsson) — Thu, 07 Sep 2006 19:32:28 GMT

This code uses acts_as_attachment (that's the attachment.filename) but you can of course replace it with anything.
It gets the file extension then looks up that extension in a dir full of files named extension.png
if none is found, unknown.png is used



<%

extension = File.extname(attachment.filename).gsub(/\./, "")

# get a file icon

icon_path = nil

Dir.entries("#{RAILS_ROOT}/public/images/filetypes").each do |entry|

	entry_extension = File.extname(entry)

	if entry.gsub(entry_extension, "") === extension

		icon_path = "/images/filetypes/" + entry

		break

	end

end

icon_path = "/images/filetypes/unknown.png" if icon_path.nil?

 %>

<%= image_tag icon_path %>

<%= attachment.filename %>

all_children!

aptiva (FjÃ¶lnir Ã?sgeirsson) — Sun, 03 Sep 2006 16:11:27 GMT

This snippet just gives you all the children of a model that acts_as_tree



  def all_children

    Page.all_children_for self

  end

  

  def self.all_children_for(parent, arr = [])

    parent.children.each { |child| arr.push child }

    parent.children.each { |child| all_children_for child, arr }

    arr

  end

Youtube url code

aptiva (FjÃ¶lnir Ã?sgeirsson) — Sun, 03 Sep 2006 16:05:34 GMT

This is a part of a ruby-cocoa app I'm writing.
(TubeSock is just terrible)



require 'net/http'

require 'uri'



class YouTubeMovie

  attr_accessor :viewer_url, :movie_url, :get_params

  def initialize(url)

    @viewer_url = url

    setMovieURL

  end

  def setMovieURL

    # Get the viewer page html

    req = Net::HTTP::Get.new @viewer_url

    viewer_page = nil

    res = Net::HTTP.start(@viewer_url.host, @viewer_url.port) do |request|

      viewer_page = request.request(req)

    end

    # Extract the required info.

    # in the html there's a line like so:

    # var fo = new SWFObject("/player2.swf?video_id=AUnPDmmnF0U&l=1363&t=OEgsToPDskJUmKC_b_nXO_yUrNLKSY18&nc=13369344", "movie_player", "450", "370", 7, "#FFFFFF");

    # we want to extract the ?video_id=AUnPDmmnF0U&l=1363&t=OEgsToPDskJUmKC_b_nXO_yUrNLKSY18&nc=13369344

    # this regex does that...

    regex = Regexp.new(/\?video_id=[\w]+&l=[\w]+&t=[\w]+&nc=[\d]+/)

    @get_params = regex.match(viewer_page.body).to_s

    @movie_url = URI.parse('http://www.youtube.com/get_video' + @get_params)

    p 'movie url: ' + @movie_url.to_s

  end

end