Tk Source Code

Executes a Tcl procedure called from the macOS 
.QW Services 
menu in the Application menu item. The
.QW Services
menu item allows for inter-application communication; data from one
application, such as selected text, can be sent to another application
for processing, for example to Safari as a search item for Google, or
to TextEdit to be appended to a file. Tk includes a stub version of
this command that displays a dialog with the data sent. This proc
should be rewritten in an application script for customization: 
.RS
.PP
.CS
proc ::tk::mac::PerformService {} {
    set data [clipboard get]
    $w insert end $data
}

}

# For now, turn off the custom mdef proc for the mac:

if {[tk windowingsystem] eq "aqua"} {
    namespace eval ::tk::mac {
	set useCustomMDEF 0
    }

    #stub proc for NSServices API, must be replaced with custom implementation
    proc ::tk::mac::PerformService {} {

	set data [clipboard get]

	tk_messageBox -icon info -title "Services Example" -message "This data was sent to Wish with the NSServices API:\n\n$data"

    }
}

#register to send data to macOS Services
if {[tk windowingsystem] eq "aqua"} {
proc ::tk::RegisterServiceWidget {w} {
    ::tk::mac::registerServiceWidget $w

	$HOME/Library/Frameworks /Library/Frameworks /System/Library/Frameworks
	(searched in that order).
Given a potential package directory $pkg, Tcl on OSX checks for the file
$pkg/Resources/Scripts/pkgIndex.tcl as well as the usual $pkg/pkgIndex.tcl.
This allows building extensions as frameworks with all script files contained in
the Resources/Scripts directory of the framework.

- [load]able binary extensions can linked as either ordinary shared libraries
(.dylib) or as MachO bundles (since 8.4.10/8.5a3); bundles have the advantage
that they are [load]ed more efficiently from a tcl VFS (no temporary copy to the
native filesystem required).

- The 'deploy' target of macosx/GNUmakefile installs the html manpages into the
standard documentation location in the Tcl/Tk frameworks:
	Tcl.framework/Resources/Documentation/Reference/Tcl
	Tk.framework/Resources/Documentation/Reference/Tk
No nroff manpages are installed by default by the GNUmakefile.

- The Tcl and Tk frameworks can be installed in any of the system's standard

- the env array is different when Wish is started from the Finder (i.e. via
LaunchServices) than when it (or tclsh) is invoked from the Terminal, in
particular PATH may not be what you expect. (Wish started by LaunchServices
inherits loginwindow's environment variables, which are essentially those set in
$HOME/.MacOSX/environment.plist, and are unrelated to those set in your shell).

- TkAqua drawing is antialiased by default, but (outline) linewidth can be used
to control whether a line/shape is drawn antialiased. The antialiasing threshold
is 0 by default (i.e. antialias everything), it can be changed by setting
	set tk::mac::CGAntialiasLimit <limit>
in your script before drawing, in which case lines (or shapes with outlines)
thinner than <limit> pixels will not be antialiased.

- Text antialiasing by default uses the standard OS antialising settings.
Setting the global variable '::tk::mac::antialiasedtext' allows to control text
antialiasing from Tcl: a value of 1 enables AA, 0 disables AA and -1 restores
the default behaviour of respecting the OS settings.

- Scrollbars: There are two scrollbar variants in Aqua, normal & small. The
normal scrollbar has a small dimension of 15, the small variant 11.
Access to the small variant was added in Tk 8.4.2.

- The default metrics of native buttons, radiobuttons, checkboxes and
menubuttons in the Cocoa-based Tk 8.5.7 and later preserve compatibility with
the older Carbon-based implementation, you can turn off the compatibility
metrics to get more native-looking spacing by setting:
	set tk::mac::useCompatibilityMetrics 0

- TkAqua provides access to native OS X images via the Tk native bitmap facility
(including any image file readable by NSImage). A native bitmap name is
interpreted as follows (in order):
    - predefined builtin 32x32 icon name (stop, caution, document, etc)
    - name defined by [tk::mac::iconBitmap]
    - NSImage named image name
    - NSImage url string

dialog window and the others match the contrasting background colors
used in ttk::notebooks and ttk::labelframes which are nested to the
corresponding depth.

5. Building Tcl/Tk on macOS
------------------------------

- At least macOS 10.3 is required to build Tcl and TkX11, and macOS 10.6
is required to build TkAqua.  The XCode application provides everything
needed to build Tk, but it is not necessary to install the full XCode.
It suffices to install the Command Line Tools package, which can be done
by running the command:
xcode-select --install

- Tcl/Tk are most easily built as macOS frameworks via GNUmakefile in
tcl/macosx and tk/macosx (see below for details), but can also be built with the
standard unix configure and make buildsystem in tcl/unix resp. tk/unix as on any

the TCL_SRCROOT and TK_SRCROOT user build settings, by default these are set to
the project-relative paths '../../tcl' and '../../tk', if your source
directories are named differently, e.g. '../../tcl8.6' and '../../tk8.6', you
need to manually change the TCL_SRCROOT and TK_SRCROOT settings by editing your
${USER}.pbxuser file (located inside the Tk.xcodeproj bundle directory) with a
text editor.

- To build universal binaries outside of the Xcode IDE, set CFLAGS as follows:
	export CFLAGS="-arch i386 -arch x86_64 -arch ppc"
This requires macOS 10.4 and Xcode 2.4 (or Xcode 2.2 if -arch x86_64 is
omitted, but _not_ Xcode 2.1) and will work on any architecture (on PowerPC
Tiger you need to add "-isysroot /Developer/SDKs/MacOSX10.4u.sdk").
Note that configure requires CFLAGS to contain a least one architecture that can
be run on the build machine (i.e. ppc on G3/G4, ppc or ppc64 on G5, ppc or i386
on Core and ppc, i386 or x86_64 on Core2/Xeon).
Universal builds of Tcl TEA extensions are also possible with CFLAGS set as
above, they will be [load]able by universal as well as thin binaries of Tcl.

- To enable weak-linking, set the MACOSX_DEPLOYMENT_TARGET environment variable
to the minimal OS version the binaries should be able to run on, e.g:
	export MACOSX_DEPLOYMENT_TARGET=10.6
This requires at least gcc 3.1; with gcc 4 or later, set/add to CFLAGS instead:
	export CFLAGS="-mmacosx-version-min=10.6"
Support for weak-linking was added with 8.4.14/8.5a5.

10.14 supports system appearance changes, and has added a "Dark Mode"
that casts all window frames and menus as black. Tk 8.6.9 has added two
virtual events, <<LightAqua>> and <<DarkAqua>>, to allow you to update
your Tk app's appearance when the system appearance changes. Just bind
your appearance-updating code to these virtual events and you will see
it triggered when the system appearance toggles between dark and light.

int TkMacOSXRegisterServiceWidgetObjCmd (
					 ClientData cd,
					 Tcl_Interp *ip,
					 int objc,
					 Tcl_Obj *CONST objv[])
{

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    /*
     * Need proper number of args.
     */

    if(objc != 2) {
	Tcl_WrongNumArgs(ip, 1, objv, "path?");
	return TCL_ERROR;

    frame = NSMakeRect(bounds.left, bounds.top, 100000, 100000);
    frame.origin.y = 0;
    if (!NSEqualRects(frame, [serviceview frame])) {
    	[serviceview setFrame:frame];
    }
    [serviceview release];
    [pool release];
    return TCL_OK;
}

/*
 * Initalize the package in the Tcl interpreter, create Tcl commands.
 */

int TkMacOSXServices_Init(
    Tcl_Interp *interp)
{
    /*
     * Set up an autorelease pool.
     */

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    /*
     * Initialize instance of TclServices to provide service functionality.
     */

    TkService *service = [[TkService alloc] init];
    ServicesInterp = interp;
    [NSApp setServicesProvider:service];
    [pool drain];
    return TCL_OK;
}

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