source: proiecte/pmake3d/make3d_original/Make3dSingleImageStanford_version0.1/third_party/vrippack-0.31/src/vrip/lib/tk/tk.tcl @ 37

# tk.tcl --
#
# Initialization script normally executed in the interpreter for each
# Tk-based application.  Arranges class bindings for widgets.
#
# RCS: @(#) $Id: tk.tcl,v 1.20 2000/03/24 19:38:57 ericm Exp $
#
# Copyright (c) 1992-1994 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
# Copyright (c) 1998-2000 Scriptics Corporation.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

# Insist on running with compatible versions of Tcl and Tk.

package require -exact Tk 8.3
package require -exact Tcl 8.3

# Add Tk's directory to the end of the auto-load search path, if it
# isn't already on the path:

if {[info exists auto_path] && [string compare {} $tk_library] && \
        [lsearch -exact $auto_path $tk_library] < 0} {
    lappend auto_path $tk_library
}

# Turn off strict Motif look and feel as a default.

set tk_strictMotif 0

# Create a ::tk namespace

namespace eval ::tk {
}

# ::tk::PlaceWindow --
#   place a toplevel at a particular position
# Arguments:
#   toplevel    name of toplevel window
#   ?placement? pointer ?center? ; places $w centered on the pointer
#               widget widgetPath ; centers $w over widget_name
#               defaults to placing toplevel in the middle of the screen
#   ?anchor?    center or widgetPath
# Results:
#   Returns nothing
#
proc ::tk::PlaceWindow {w {place ""} {anchor ""}} {
    wm withdraw $w
    update idletasks
    set checkBounds 1
    if {[string equal -len [string length $place] $place "pointer"]} {
        ## place at POINTER (centered if $anchor == center)
        if {[string equal -len [string length $anchor] $anchor "center"]} {
            set x [expr {[winfo pointerx $w]-[winfo reqwidth $w]/2}]
            set y [expr {[winfo pointery $w]-[winfo reqheight $w]/2}]
        } else {
            set x [winfo pointerx $w]
            set y [winfo pointery $w]
        }
    } elseif {[string equal -len [string length $place] $place "widget"] && \
            [winfo exists $anchor] && [winfo ismapped $anchor]} {
        ## center about WIDGET $anchor, widget must be mapped
        set x [expr {[winfo rootx $anchor] + \
                ([winfo width $anchor]-[winfo reqwidth $w])/2}]
        set y [expr {[winfo rooty $anchor] + \
                ([winfo height $anchor]-[winfo reqheight $w])/2}]
    } else {
        set x [expr {([winfo screenwidth $w]-[winfo reqwidth $w])/2}]
        set y [expr {([winfo screenheight $w]-[winfo reqheight $w])/2}]
        set checkBounds 0
    }
    if {$checkBounds} {
        if {$x < 0} {
            set x 0
        } elseif {$x > ([winfo screenwidth $w]-[winfo reqwidth $w])} {
            set x [expr {[winfo screenwidth $w]-[winfo reqwidth $w]}]
        }
        if {$y < 0} {
            set y 0
        } elseif {$y > ([winfo screenheight $w]-[winfo reqheight $w])} {
            set y [expr {[winfo screenheight $w]-[winfo reqheight $w]}]
        }
    }
    wm geometry $w +$x+$y
    wm deiconify $w
}

# ::tk::SetFocusGrab --
#   swap out current focus and grab temporarily (for dialogs)
# Arguments:
#   grab        new window to grab
#   focus       window to give focus to
# Results:
#   Returns nothing
#
proc ::tk::SetFocusGrab {grab {focus {}}} {
    set index "$grab,$focus"
    upvar ::tk::FocusGrab($index) data

    lappend data [focus]
    set oldGrab [grab current $grab]
    lappend data $oldGrab
    if {[winfo exists $oldGrab]} {
        lappend data [grab status $oldGrab]
    }
    grab $grab
    if {[winfo exists $focus]} {
        focus $focus
    }
}

# ::tk::RestoreFocusGrab --
#   restore old focus and grab (for dialogs)
# Arguments:
#   grab        window that had taken grab
#   focus       window that had taken focus
#   destroy     destroy|withdraw - how to handle the old grabbed window
# Results:
#   Returns nothing
#
proc ::tk::RestoreFocusGrab {grab focus {destroy destroy}} {
    set index "$grab,$focus"
    foreach {oldFocus oldGrab oldStatus} $::tk::FocusGrab($index) { break }
    unset ::tk::FocusGrab($index)

    catch {focus $oldFocus}
    grab release $grab
    if {[string equal $destroy "withdraw"]} {
        wm withdraw $grab
    } else {
        destroy $grab
    }
    if {[winfo exists $oldGrab] && [winfo ismapped $oldGrab]} {
        if {[string equal $oldStatus "global"]} {
            grab -global $oldGrab
        } else {
            grab $oldGrab
        }
    }
}

# tkScreenChanged --
# This procedure is invoked by the binding mechanism whenever the
# "current" screen is changing.  The procedure does two things.
# First, it uses "upvar" to make global variable "tkPriv" point at an
# array variable that holds state for the current display.  Second,
# it initializes the array if it didn't already exist.
#
# Arguments:
# screen -              The name of the new screen.

proc tkScreenChanged screen {
    set x [string last . $screen]
    if {$x > 0} {
        set disp [string range $screen 0 [expr {$x - 1}]]
    } else {
        set disp $screen
    }

    uplevel #0 upvar #0 tkPriv.$disp tkPriv
    global tkPriv
    global tcl_platform

    if {[info exists tkPriv]} {
        set tkPriv(screen) $screen
        return
    }
    array set tkPriv {
        activeMenu      {}
        activeItem      {}
        afterId         {}
        buttons         0
        buttonWindow    {}
        dragging        0
        focus           {}
        grab            {}
        initPos         {}
        inMenubutton    {}
        listboxPrev     {}
        menuBar         {}
        mouseMoved      0
        oldGrab         {}
        popup           {}
        postedMb        {}
        pressX          0
        pressY          0
        prevPos         0
        selectMode      char
    }
    set tkPriv(screen) $screen
    set tkPriv(tearoff) [string equal $tcl_platform(platform) "unix"]
    set tkPriv(window) {}
}

# Do initial setup for tkPriv, so that it is always bound to something
# (otherwise, if someone references it, it may get set to a non-upvar-ed
# value, which will cause trouble later).

tkScreenChanged [winfo screen .]

# tkEventMotifBindings --
# This procedure is invoked as a trace whenever tk_strictMotif is
# changed.  It is used to turn on or turn off the motif virtual
# bindings.
#
# Arguments:
# n1 - the name of the variable being changed ("tk_strictMotif").

proc tkEventMotifBindings {n1 dummy dummy} {
    upvar $n1 name
    
    if {$name} {
        set op delete
    } else {
        set op add
    }

    event $op <<Cut>> <Control-Key-w>
    event $op <<Copy>> <Meta-Key-w> 
    event $op <<Paste>> <Control-Key-y>
}

#----------------------------------------------------------------------
# Define common dialogs on platforms where they are not implemented 
# using compiled code.
#----------------------------------------------------------------------

if {[string equal [info commands tk_chooseColor] ""]} {
    proc tk_chooseColor {args} {
        return [eval tkColorDialog $args]
    }
}
if {[string equal [info commands tk_getOpenFile] ""]} {
    proc tk_getOpenFile {args} {
        if {$::tk_strictMotif} {
            return [eval tkMotifFDialog open $args]
        } else {
            return [eval ::tk::dialog::file::tkFDialog open $args]
        }
    }
}
if {[string equal [info commands tk_getSaveFile] ""]} {
    proc tk_getSaveFile {args} {
        if {$::tk_strictMotif} {
            return [eval tkMotifFDialog save $args]
        } else {
            return [eval ::tk::dialog::file::tkFDialog save $args]
        }
    }
}
if {[string equal [info commands tk_messageBox] ""]} {
    proc tk_messageBox {args} {
        return [eval tkMessageBox $args]
    }
}
if {[string equal [info command tk_chooseDirectory] ""]} {
    proc tk_chooseDirectory {args} {
        return [eval ::tk::dialog::file::chooseDir::tkChooseDirectory $args]
    }
}
        
#----------------------------------------------------------------------
# Define the set of common virtual events.
#----------------------------------------------------------------------

switch $tcl_platform(platform) {
    "unix" {
        event add <<Cut>> <Control-Key-x> <Key-F20> 
        event add <<Copy>> <Control-Key-c> <Key-F16>
        event add <<Paste>> <Control-Key-v> <Key-F18>
        event add <<PasteSelection>> <ButtonRelease-2>
        # Some OS's define a goofy (as in, not <Shift-Tab>) keysym
        # that is returned when the user presses <Shift-Tab>.  In order for
        # tab traversal to work, we have to add these keysyms to the 
        # PrevWindow event.
        # The info exists is necessary, because tcl_platform(os) doesn't
        # exist in safe interpreters.
        if {[info exists tcl_platform(os)]} {
            switch $tcl_platform(os) {
                "IRIX"  -
                "Linux" { event add <<PrevWindow>> <ISO_Left_Tab> }
                "HP-UX" { event add <<PrevWindow>> <hpBackTab> }
            }
        }
        trace variable tk_strictMotif w tkEventMotifBindings
        set tk_strictMotif $tk_strictMotif
    }
    "windows" {
        event add <<Cut>> <Control-Key-x> <Shift-Key-Delete>
        event add <<Copy>> <Control-Key-c> <Control-Key-Insert>
        event add <<Paste>> <Control-Key-v> <Shift-Key-Insert>
        event add <<PasteSelection>> <ButtonRelease-2>
    }
    "macintosh" {
        event add <<Cut>> <Control-Key-x> <Key-F2> 
        event add <<Copy>> <Control-Key-c> <Key-F3>
        event add <<Paste>> <Control-Key-v> <Key-F4>
        event add <<PasteSelection>> <ButtonRelease-2>
        event add <<Clear>> <Clear>
    }
}

# ----------------------------------------------------------------------
# Read in files that define all of the class bindings.
# ----------------------------------------------------------------------

if {[string compare $tcl_platform(platform) "macintosh"] && \
        [string compare {} $tk_library]} {
    source [file join $tk_library button.tcl]
    source [file join $tk_library entry.tcl]
    source [file join $tk_library listbox.tcl]
    source [file join $tk_library menu.tcl]
    source [file join $tk_library scale.tcl]
    source [file join $tk_library scrlbar.tcl]
    source [file join $tk_library text.tcl]
}

# ----------------------------------------------------------------------
# Default bindings for keyboard traversal.
# ----------------------------------------------------------------------

event add <<PrevWindow>> <Shift-Tab>
bind all <Tab> {tkTabToWindow [tk_focusNext %W]}
bind all <<PrevWindow>> {tkTabToWindow [tk_focusPrev %W]}

# tkCancelRepeat --
# This procedure is invoked to cancel an auto-repeat action described
# by tkPriv(afterId).  It's used by several widgets to auto-scroll
# the widget when the mouse is dragged out of the widget with a
# button pressed.
#
# Arguments:
# None.

proc tkCancelRepeat {} {
    global tkPriv
    after cancel $tkPriv(afterId)
    set tkPriv(afterId) {}
}

# tkTabToWindow --
# This procedure moves the focus to the given widget.  If the widget
# is an entry, it selects the entire contents of the widget.
#
# Arguments:
# w - Window to which focus should be set.

proc tkTabToWindow {w} {
    if {[string equal [winfo class $w] Entry]} {
        $w selection range 0 end
        $w icursor end
    }
    focus $w
}