cLabs

Just now reading about Macromedia's new GUI markup language called (tentatively, it's still in beta) MXML (Macromedia Flex Markup Language) [shouldn't this be MFML? -- mifmle??]. Sean Neville compares and contrasts MXML with XUL and XAML.

Here's some examples.

XUL


<?xml version="1.0"?>

<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>

<window id="example-window" title="Example 2.2.1"
        xmlns:html="http://www.w3.org/1999/xhtml"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<button label="Normal"/>
<button label="Disabled" disabled="true"/>
<button label="Default" default="true"/>


</window>

XAML


<!-- Window1.xaml -->
<Window
  xmlns="http://schemas.microsoft.com/2003/xaml"
  xmlns:def="Definition"
  def:Class="Application3.Window1"
  Text="My Three Rectangles">
  <FlowPanel>
    <FlowPanel.Resources>
      <Style>
        <Rectangle Fill="Red" Width="150" Height="100" Margin="10" />
      </style>
    </FlowPanel>

    <Rectangle />
    <Rectangle />
    <Rectangle />

  </FlowPanel>
</Window>

MXML


<?xml version="1.0" encoding="iso-8859-1"?>

<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml">

    <mx:TextInput id="source" width="100"/>
    <mx:Button label="Copy" click="destination.text=source.text"/>
    <mx:TextInput id="destination" width="100"/>

</mx:Application>

And now, from the nothing-new-under-the-sun department, here's how Delphi has been doing this for sometime (though I'm sure there are plenty of geeks out there who can show me where Borland got this idea from...)**:


object Form1: TForm1
  Left = 309
  Top = 107
  Width = 696
  Height = 480
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Panel1: TPanel
    Left = 160
    Top = 96
    Width = 185
    Height = 41
    Caption = 'Panel1'
    TabOrder = 0
    object Button1: TButton
      Left = 40
      Top = 16
      Width = 75
      Height = 25
      Caption = 'Button1'
      TabOrder = 0
    end
  end
end

Agreeing with me (little does he know...), Don Box mentions in his blog why there's any hubbub about XAML:

Of course, we (the industry) have managed to build visual designers over imperative code for at least a decade, so why is XAML interesting?

It's easy.

XAML is ultimately yet another XML vocabulary.

This means that any investments you've made in processing, querying, transforming, and storing XML accrues to XAML.

That's the real story here. The rest is just your typical “Microsoft sneezed” side-show.

But there are those who hate XML. Rubyists who hate XML seem to like YAML, and YAML looks much more like the Delphi version than the newer XML versions.

** Update: Allen Bauer, current Delphi architect at Borland, makes the same point.

tags: ComputersAndTechnology