Dropped Windows 2000 support.

README.md

@@ -2,11 +2,13 @@
 # Native UI library for Go
 ### THIS PACKAGE IS UNDER ACTIVE DEVELOPMENT. Feel free to start using it, but mind: it's far from feature-complete, it's still in need of testing and crash-fixing, and the API can (and will) change. If you can help, please do! Run `./test` to build a test binary `test/test` which runs a (mostly) feature-complete UI test. Run `./d32 ./test` to build a 32-bit version (you will need a cgo-enabled 32-bit go environment, and I have only tested this on Mac OS X).
 
+### UPDATE 12 March 2014: Windows 2000 is no longer supported [as it is no longer supported by Go](https://codereview.appspot.com/74790043).
+
 This is a simple library for building cross-platform GUI programs in Go. It targets Windows, Mac OS X, Linux, and other Unixes, and provides a thread-safe, channel-based API. The API itself is minimal; it aims to provide only what is necessary for GUI program design. That being said, suggestions are welcome. Layout is done using various layout managers, and some effort is taken to conform to the target platform's UI guidelines. Otherwise, the library uses native toolkits.
 
 ui aims to run on all supported versions of supported platforms. To be more precise, the system requirements are:
 
-* Windows: Windows 2000 or newer. The Windows backend uses package `syscall` and calls Windows DLLs directly, so does not rely on cgo.
+* Windows: Windows XP or newer. The Windows backend uses package `syscall` and calls Windows DLLs directly, so does not rely on cgo.
 * Mac OS X: Mac OS X 10.6 (Snow Leopard) or newer. Objective-C dispatch is done by interfacing with libobjc directly, and thus this uses cgo.
 	* Note: you will need Go 1.3 or newer for this verison, as it uses a single .m file due to technical restrictions (read the comments in `bleh_darwin.m` for details), and earlier versions of Go do not auto-build .m files.
 * Other Unixes: The Unix backend uses GTK+, and thus cgo. It requires GTK+ 3.4 or newer; for Ubuntu this means 12.04 LTS (Precise Pangolin) at minimum. Check your distribution.

comctl_windows.go

@@ -8,7 +8,7 @@ import (
 )
 
 // pretty much every constant here except _WM_USER is from commctrl.h
-// TODO for all: filter out constants not available in Windows 2000
+// TODO for all: filter out constants not available in Windows XP
 
 // InitCommonControlsEx constants.
 const (

controls_windows.go

@@ -6,7 +6,7 @@ import (
 //	"unsafe"
 )
 
-// TODO for all: filter any not provided in Windows 2000
+// TODO for all: filter any not provided in Windows XP
 
 // Button styles.
 const (

progressbar.go

@@ -21,7 +21,7 @@ func NewProgressBar() *ProgressBar {
 	}
 }
 
-// SetProgress sets the currently indicated progress amount on the ProgressBar. If this amount is outside the range [0,100] (ideally -1), the function will panic (it should allow indeterminate progress bars, alas those are not supported on Windows 2000).
+// SetProgress sets the currently indicated progress amount on the ProgressBar. If this amount is outside the range [0,100] (ideally -1), the function will panic (TODO make it indeterminate).
 func (p *ProgressBar) SetProgress(percent int) {
 	p.lock.Lock()
 	defer p.lock.Unlock()

windows_windows.go

@@ -42,7 +42,7 @@ const (
 	_WS_EX_ACCEPTFILES = 0x00000010
 	_WS_EX_APPWINDOW = 0x00040000
 	_WS_EX_CLIENTEDGE = 0x00000200
-//	_WS_EX_COMPOSITED = 0x02000000	// [Windows 2000:This style is not supported.]
+	_WS_EX_COMPOSITED = 0x02000000
 	_WS_EX_CONTEXTHELP = 0x00000400
 	_WS_EX_CONTROLPARENT = 0x00010000
 	_WS_EX_DLGMODALFRAME = 0x00000001
@@ -105,8 +105,8 @@ const (
 	_COLOR_INFOBK = 24
 	_COLOR_INFOTEXT = 23
 	_COLOR_MENU = 4
-//	COLOR_MENUHILIGHT = 29	// [Windows 2000:This value is not supported.]
-//	COLOR_MENUBAR = 30		// [Windows 2000:This value is not supported.]
+	COLOR_MENUHILIGHT = 29
+	COLOR_MENUBAR = 30
 	_COLOR_MENUTEXT = 7
 	_COLOR_SCROLLBAR = 0
 	_COLOR_WINDOW = 5