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tk.tcl
# tk.tcl -- # # Initialization script normally executed in the interpreter for each Tk-based # application. Arranges class bindings for widgets. # # Copyright (c) 1992-1994 The Regents of the University of California. # Copyright (c) 1994-1996 Sun Microsystems, Inc. # Copyright (c) 1998-2000 Ajuba Solutions. # # See the file "license.terms" for information on usage and redistribution of # this file, and for a DISCLAIMER OF ALL WARRANTIES. # Verify that we have Tk binary and script components from the same release package require -exact Tk 8.6.8 # Create a ::tk namespace namespace eval ::tk { # Set up the msgcat commands namespace eval msgcat { namespace export mc mcmax if {[interp issafe] || [catch {package require msgcat}]} { # The msgcat package is not available. Supply our own # minimal replacement. proc mc {src args} { return [format $src {*}$args] } proc mcmax {args} { set max 0 foreach string $args { set len [string length $string] if {$len>$max} { set max $len } } return $max } } else { # Get the commands from the msgcat package that Tk uses. namespace import ::msgcat::mc namespace import ::msgcat::mcmax ::msgcat::mcload [file join $::tk_library msgs] } } namespace import ::tk::msgcat::* } # and a ::ttk namespace namespace eval ::ttk { if {$::tk_library ne ""} { # avoid file join to work in safe interps, but this is also x-plat ok variable library $::tk_library/ttk } } # Add Ttk & Tk's directory to the end of the auto-load search path, if it # isn't already on the path: if {[info exists ::auto_path] && ($::tk_library ne "") && ($::tk_library ni $::auto_path) } then { lappend ::auto_path $::tk_library $::ttk::library } # Turn off strict Motif look and feel as a default. set ::tk_strictMotif 0 # Turn on useinputmethods (X Input Methods) by default. # We catch this because safe interpreters may not allow the call. catch {tk useinputmethods 1} # ::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 $w update idletasks set checkBounds 1 if {$place eq ""} { set x [expr {([winfo screenwidth $w]-[winfo reqwidth $w])/2}] set y [expr {([winfo screenheight $w]-[winfo reqheight $w])/2}] set checkBounds 0 } elseif {[string equal -length [string length $place] $place "pointer"]} { ## place at POINTER (centered if $anchor == center) if {[string equal -length [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 -length [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 < [winfo vrootx $w]} { set x [winfo vrootx $w] } elseif {$x > ([winfo vrootx $w]+[winfo vrootwidth $w]-[winfo reqwidth $w])} { set x [expr {[winfo vrootx $w]+[winfo vrootwidth $w]-[winfo reqwidth $w]}] } if {$y < [winfo vrooty $w]} { set y [winfo vrooty $w] } elseif {$y > ([winfo vrooty $w]+[winfo vrootheight $w]-[winfo reqheight $w])} { set y [expr {[winfo vrooty $w]+[winfo vrootheight $w]-[winfo reqheight $w]}] } if {[tk windowingsystem] eq "aqua"} { # Avoid the native menu bar which sits on top of everything. if {$y < 22} { set y 22 } } } wm maxsize $w [winfo vrootwidth $w] [winfo vrootheight $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] } # The "grab" command will fail if another application # already holds the grab. So catch it. catch {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,$focus" if {[info exists ::tk::FocusGrab($index)]} { foreach {oldFocus oldGrab oldStatus} $::tk::FocusGrab($index) { break } unset ::tk::FocusGrab($index) } else { set oldGrab "" } catch {focus $oldFocus} grab release $grab if {$destroy eq "withdraw"} { wm withdraw $grab } else { destroy $grab } if {[winfo exists $oldGrab] && [winfo ismapped $oldGrab]} { if {$oldStatus eq "global"} { grab -global $oldGrab } else { grab $oldGrab } } } # ::tk::GetSelection -- # This tries to obtain the default selection. On Unix, we first try # and get a UTF8_STRING, a type supported by modern Unix apps for # passing Unicode data safely. We fall back on the default STRING # type otherwise. On Windows, only the STRING type is necessary. # Arguments: # w The widget for which the selection will be retrieved. # Important for the -displayof property. # sel The source of the selection (PRIMARY or CLIPBOARD) # Results: # Returns the selection, or an error if none could be found # if {[tk windowingsystem] ne "win32"} { proc ::tk::GetSelection {w {sel PRIMARY}} { if {[catch { selection get -displayof $w -selection $sel -type UTF8_STRING } txt] && [catch { selection get -displayof $w -selection $sel } txt]} then { return -code error -errorcode {TK SELECTION NONE} \ "could not find default selection" } else { return $txt } } } else { proc ::tk::GetSelection {w {sel PRIMARY}} { if {[catch { selection get -displayof $w -selection $sel } txt]} then { return -code error -errorcode {TK SELECTION NONE} \ "could not find default selection" } else { return $txt } } } # ::tk::ScreenChanged -- # 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 variable "::tk::Priv" 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 ::tk::ScreenChanged screen { # Extract the display name. set disp [string range $screen 0 [string last . $screen]-1] # Ensure that namespace separators never occur in the display name (as # they cause problems in variable names). Double-colons exist in some VNC # display names. [Bug 2912473] set disp [string map {:: _doublecolon_} $disp] uplevel #0 [list upvar #0 ::tk::Priv.$disp ::tk::Priv] variable ::tk::Priv if {[info exists Priv]} { set Priv(screen) $screen return } array set Priv { 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 Priv(screen) $screen set Priv(tearoff) [string equal [tk windowingsystem] "x11"] set Priv(window) {} } # Do initial setup for Priv, 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). tk::ScreenChanged [winfo screen .] # ::tk::EventMotifBindings -- # 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 ::tk::EventMotifBindings {n1 dummy dummy} { upvar $n1 name if {$name} { set op delete } else { set op add } event $op <<Cut>> <Control-Key-w> <Control-Lock-Key-W> <Shift-Key-Delete> event $op <<Copy>> <Meta-Key-w> <Meta-Lock-Key-W> <Control-Key-Insert> event $op <<Paste>> <Control-Key-y> <Control-Lock-Key-Y> <Shift-Key-Insert> event $op <<PrevChar>> <Control-Key-b> <Control-Lock-Key-B> event $op <<NextChar>> <Control-Key-f> <Control-Lock-Key-F> event $op <<PrevLine>> <Control-Key-p> <Control-Lock-Key-P> event $op <<NextLine>> <Control-Key-n> <Control-Lock-Key-N> event $op <<LineStart>> <Control-Key-a> <Control-Lock-Key-A> event $op <<LineEnd>> <Control-Key-e> <Control-Lock-Key-E> event $op <<SelectPrevChar>> <Control-Key-B> <Control-Lock-Key-b> event $op <<SelectNextChar>> <Control-Key-F> <Control-Lock-Key-f> event $op <<SelectPrevLine>> <Control-Key-P> <Control-Lock-Key-p> event $op <<SelectNextLine>> <Control-Key-N> <Control-Lock-Key-n> event $op <<SelectLineStart>> <Control-Key-A> <Control-Lock-Key-a> event $op <<SelectLineEnd>> <Control-Key-E> <Control-Lock-Key-e> } #---------------------------------------------------------------------- # Define common dialogs on platforms where they are not implemented # using compiled code. #---------------------------------------------------------------------- if {![llength [info commands tk_chooseColor]]} { proc ::tk_chooseColor {args} { return [::tk::dialog::color:: {*}$args] } } if {![llength [info commands tk_getOpenFile]]} { proc ::tk_getOpenFile {args} { if {$::tk_strictMotif} { return [::tk::MotifFDialog open {*}$args] } else { return [::tk::dialog::file:: open {*}$args] } } } if {![llength [info commands tk_getSaveFile]]} { proc ::tk_getSaveFile {args} { if {$::tk_strictMotif} { return [::tk::MotifFDialog save {*}$args] } else { return [::tk::dialog::file:: save {*}$args] } } } if {![llength [info commands tk_messageBox]]} { proc ::tk_messageBox {args} { return [::tk::MessageBox {*}$args] } } if {![llength [info command tk_chooseDirectory]]} { proc ::tk_chooseDirectory {args} { return [::tk::dialog::file::chooseDir:: {*}$args] } } #---------------------------------------------------------------------- # Define the set of common virtual events. #---------------------------------------------------------------------- switch -exact -- [tk windowingsystem] { "x11" { event add <<Cut>> <Control-Key-x> <Key-F20> <Control-Lock-Key-X> event add <<Copy>> <Control-Key-c> <Key-F16> <Control-Lock-Key-C> event add <<Paste>> <Control-Key-v> <Key-F18> <Control-Lock-Key-V> event add <<PasteSelection>> <ButtonRelease-2> event add <<Undo>> <Control-Key-z> <Control-Lock-Key-Z> event add <<Redo>> <Control-Key-Z> <Control-Lock-Key-z> event add <<ContextMenu>> <Button-3> # On Darwin/Aqua, buttons from left to right are 1,3,2. On Darwin/X11 with recent # XQuartz as the X server, they are 1,2,3; other X servers may differ. event add <<SelectAll>> <Control-Key-slash> event add <<SelectNone>> <Control-Key-backslash> event add <<NextChar>> <Right> event add <<SelectNextChar>> <Shift-Right> event add <<PrevChar>> <Left> event add <<SelectPrevChar>> <Shift-Left> event add <<NextWord>> <Control-Right> event add <<SelectNextWord>> <Control-Shift-Right> event add <<PrevWord>> <Control-Left> event add <<SelectPrevWord>> <Control-Shift-Left> event add <<LineStart>> <Home> event add <<SelectLineStart>> <Shift-Home> event add <<LineEnd>> <End> event add <<SelectLineEnd>> <Shift-End> event add <<PrevLine>> <Up> event add <<NextLine>> <Down> event add <<SelectPrevLine>> <Shift-Up> event add <<SelectNextLine>> <Shift-Down> event add <<PrevPara>> <Control-Up> event add <<NextPara>> <Control-Down> event add <<SelectPrevPara>> <Control-Shift-Up> event add <<SelectNextPara>> <Control-Shift-Down> event add <<ToggleSelection>> <Control-ButtonPress-1> # 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. We use catch just in case the keysym isn't recognized. # This is needed for XFree86 systems catch { event add <<PrevWindow>> <ISO_Left_Tab> } # This seems to be correct on *some* HP systems. catch { event add <<PrevWindow>> <hpBackTab> } trace add variable ::tk_strictMotif write ::tk::EventMotifBindings set ::tk_strictMotif $::tk_strictMotif # On unix, we want to always display entry/text selection, # regardless of which window has focus set ::tk::AlwaysShowSelection 1 } "win32" { event add <<Cut>> <Control-Key-x> <Shift-Key-Delete> <Control-Lock-Key-X> event add <<Copy>> <Control-Key-c> <Control-Key-Insert> <Control-Lock-Key-C> event add <<Paste>> <Control-Key-v> <Shift-Key-Insert> <Control-Lock-Key-V> event add <<PasteSelection>> <ButtonRelease-2> event add <<Undo>> <Control-Key-z> <Control-Lock-Key-Z> event add <<Redo>> <Control-Key-y> <Control-Lock-Key-Y> event add <<ContextMenu>> <Button-3> event add <<SelectAll>> <Control-Key-slash> <Control-Key-a> <Control-Lock-Key-A> event add <<SelectNone>> <Control-Key-backslash> event add <<NextChar>> <Right> event add <<SelectNextChar>> <Shift-Right> event add <<PrevChar>> <Left> event add <<SelectPrevChar>> <Shift-Left> event add <<NextWord>> <Control-Right> event add <<SelectNextWord>> <Control-Shift-Right> event add <<PrevWord>> <Control-Left> event add <<SelectPrevWord>> <Control-Shift-Left> event add <<LineStart>> <Home> event add <<SelectLineStart>> <Shift-Home> event add <<LineEnd>> <End> event add <<SelectLineEnd>> <Shift-End> event add <<PrevLine>> <Up> event add <<NextLine>> <Down> event add <<SelectPrevLine>> <Shift-Up> event add <<SelectNextLine>> <Shift-Down> event add <<PrevPara>> <Control-Up> event add <<NextPara>> <Control-Down> event add <<SelectPrevPara>> <Control-Shift-Up> event add <<SelectNextPara>> <Control-Shift-Down> event add <<ToggleSelection>> <Control-ButtonPress-1> } "aqua" { event add <<Cut>> <Command-Key-x> <Key-F2> <Command-Lock-Key-X> event add <<Copy>> <Command-Key-c> <Key-F3> <Command-Lock-Key-C> event add <<Paste>> <Command-Key-v> <Key-F4> <Command-Lock-Key-V> event add <<PasteSelection>> <ButtonRelease-3> event add <<Clear>> <Clear> event add <<ContextMenu>> <Button-2> # Official bindings # See http://support.apple.com/kb/HT1343 event add <<SelectAll>> <Command-Key-a> event add <<SelectNone>> <Option-Command-Key-a> event add <<Undo>> <Command-Key-z> <Command-Lock-Key-Z> event add <<Redo>> <Shift-Command-Key-z> <Shift-Command-Lock-Key-z> event add <<NextChar>> <Right> <Control-Key-f> <Control-Lock-Key-F> event add <<SelectNextChar>> <Shift-Right> <Shift-Control-Key-F> <Shift-Control-Lock-Key-F> event add <<PrevChar>> <Left> <Control-Key-b> <Control-Lock-Key-B> event add <<SelectPrevChar>> <Shift-Left> <Shift-Control-Key-B> <Shift-Control-Lock-Key-B> event add <<NextWord>> <Option-Right> event add <<SelectNextWord>> <Shift-Option-Right> event add <<PrevWord>> <Option-Left> event add <<SelectPrevWord>> <Shift-Option-Left> event add <<LineStart>> <Home> <Command-Left> <Control-Key-a> <Control-Lock-Key-A> event add <<SelectLineStart>> <Shift-Home> <Shift-Command-Left> <Shift-Control-Key-A> <Shift-Control-Lock-Key-A> event add <<LineEnd>> <End> <Command-Right> <Control-Key-e> <Control-Lock-Key-E> event add <<SelectLineEnd>> <Shift-End> <Shift-Command-Right> <Shift-Control-Key-E> <Shift-Control-Lock-Key-E> event add <<PrevLine>> <Up> <Control-Key-p> <Control-Lock-Key-P> event add <<SelectPrevLine>> <Shift-Up> <Shift-Control-Key-P> <Shift-Control-Lock-Key-P> event add <<NextLine>> <Down> <Control-Key-n> <Control-Lock-Key-N> event add <<SelectNextLine>> <Shift-Down> <Shift-Control-Key-N> <Shift-Control-Lock-Key-N> # Not official, but logical extensions of above. Also derived from # bindings present in MS Word on OSX. event add <<PrevPara>> <Option-Up> event add <<NextPara>> <Option-Down> event add <<SelectPrevPara>> <Shift-Option-Up> event add <<SelectNextPara>> <Shift-Option-Down> event add <<ToggleSelection>> <Command-ButtonPress-1> } } # ---------------------------------------------------------------------- # Read in files that define all of the class bindings. # ---------------------------------------------------------------------- if {$::tk_library ne ""} { proc ::tk::SourceLibFile {file} { namespace eval :: [list source [file join $::tk_library $file.tcl]] } namespace eval ::tk { SourceLibFile icons SourceLibFile button SourceLibFile entry SourceLibFile listbox SourceLibFile menu SourceLibFile panedwindow SourceLibFile scale SourceLibFile scrlbar SourceLibFile spinbox SourceLibFile text } } # ---------------------------------------------------------------------- # Default bindings for keyboard traversal. # ---------------------------------------------------------------------- event add <<PrevWindow>> <Shift-Tab> event add <<NextWindow>> <Tab> bind all <<NextWindow>> {tk::TabToWindow [tk_focusNext %W]} bind all <<PrevWindow>> {tk::TabToWindow [tk_focusPrev %W]} # ::tk::CancelRepeat -- # This procedure is invoked to cancel an auto-repeat action described # by ::tk::Priv(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 ::tk::CancelRepeat {} { variable ::tk::Priv after cancel $Priv(afterId) set Priv(afterId) {} } # ::tk::TabToWindow -- # This procedure moves the focus to the given widget. # It sends a <<TraverseOut>> virtual event to the previous focus window, # if any, before changing the focus, and a <<TraverseIn>> event # to the new focus window afterwards. # # Arguments: # w - Window to which focus should be set. proc ::tk::TabToWindow {w} { set focus [focus] if {$focus ne ""} { event generate $focus <<TraverseOut>> } focus $w event generate $w <<TraverseIn>> } # ::tk::UnderlineAmpersand -- # This procedure takes some text with ampersand and returns text w/o # ampersand and position of the ampersand. Double ampersands are # converted to single ones. Position returned is -1 when there is no # ampersand. # proc ::tk::UnderlineAmpersand {text} { set s [string map {&& & & \ufeff} $text] set idx [string first \ufeff $s] return [list [string map {\ufeff {}} $s] $idx] } # ::tk::SetAmpText -- # Given widget path and text with "magic ampersands", sets -text and # -underline options for the widget # proc ::tk::SetAmpText {widget text} { lassign [UnderlineAmpersand $text] newtext under $widget configure -text $newtext -underline $under } # ::tk::AmpWidget -- # Creates new widget, turning -text option into -text and -underline # options, returned by ::tk::UnderlineAmpersand. # proc ::tk::AmpWidget {class path args} { set options {} foreach {opt val} $args { if {$opt eq "-text"} { lassign [UnderlineAmpersand $val] newtext under lappend options -text $newtext -underline $under } else { lappend options $opt $val } } set result [$class $path {*}$options] if {[string match "*button" $class]} { bind $path <<AltUnderlined>> [list $path invoke] } return $result } # ::tk::AmpMenuArgs -- # Processes arguments for a menu entry, turning -label option into # -label and -underline options, returned by ::tk::UnderlineAmpersand. # The cmd argument is supposed to be either "add" or "entryconfigure" # proc ::tk::AmpMenuArgs {widget cmd type args} { set options {} foreach {opt val} $args { if {$opt eq "-label"} { lassign [UnderlineAmpersand $val] newlabel under lappend options -label $newlabel -underline $under } else { lappend options $opt $val } } $widget $cmd $type {*}$options } # ::tk::FindAltKeyTarget -- # Search recursively through the hierarchy of visible widgets to find # button or label which has $char as underlined character. # proc ::tk::FindAltKeyTarget {path char} { set class [winfo class $path] if {$class in { Button Checkbutton Label Radiobutton TButton TCheckbutton TLabel TRadiobutton } && [string equal -nocase $char \ [string index [$path cget -text] [$path cget -underline]]]} { return $path } set subwins [concat [grid slaves $path] [pack slaves $path] \ [place slaves $path]] if {$class eq "Canvas"} { foreach item [$path find all] { if {[$path type $item] eq "window"} { set w [$path itemcget $item -window] if {$w ne ""} {lappend subwins $w} } } } elseif {$class eq "Text"} { lappend subwins {*}[$path window names] } foreach child $subwins { set target [FindAltKeyTarget $child $char] if {$target ne ""} { return $target } } } # ::tk::AltKeyInDialog -- # <Alt-Key> event handler for standard dialogs. Sends <<AltUnderlined>> # to button or label which has appropriate underlined character. # proc ::tk::AltKeyInDialog {path key} { set target [FindAltKeyTarget $path $key] if {$target ne ""} { event generate $target <<AltUnderlined>> } } # ::tk::mcmaxamp -- # Replacement for mcmax, used for texts with "magic ampersand" in it. # proc ::tk::mcmaxamp {args} { set maxlen 0 foreach arg $args { # Should we run [mc] in caller's namespace? lassign [UnderlineAmpersand [mc $arg]] msg set length [string length $msg] if {$length > $maxlen} { set maxlen $length } } return $maxlen } # For now, turn off the custom mdef proc for the mac: if {[tk windowingsystem] eq "aqua"} { namespace eval ::tk::mac { set useCustomMDEF 0 } } # Run the Ttk themed widget set initialization if {$::ttk::library ne ""} { uplevel \#0 [list source $::ttk::library/ttk.tcl] } # Local Variables: # mode: tcl # fill-column: 78 # End: