--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/python-2.5.2/win32/tcl/tk8.4/scrlbar.tcl Fri Apr 03 17:19:34 2009 +0100
@@ -0,0 +1,430 @@
+# scrlbar.tcl --
+#
+# This file defines the default bindings for Tk scrollbar widgets.
+# It also provides procedures that help in implementing the bindings.
+#
+# RCS: @(#) $Id: scrlbar.tcl,v 1.10.2.1 2004/02/17 07:17:17 das Exp $
+#
+# Copyright (c) 1994 The Regents of the University of California.
+# Copyright (c) 1994-1996 Sun Microsystems, Inc.
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+#
+
+#-------------------------------------------------------------------------
+# The code below creates the default class bindings for scrollbars.
+#-------------------------------------------------------------------------
+
+# Standard Motif bindings:
+if {[string equal [tk windowingsystem] "x11"]} {
+
+bind Scrollbar <Enter> {
+ if {$tk_strictMotif} {
+ set tk::Priv(activeBg) [%W cget -activebackground]
+ %W config -activebackground [%W cget -background]
+ }
+ %W activate [%W identify %x %y]
+}
+bind Scrollbar <Motion> {
+ %W activate [%W identify %x %y]
+}
+
+# The "info exists" command in the following binding handles the
+# situation where a Leave event occurs for a scrollbar without the Enter
+# event. This seems to happen on some systems (such as Solaris 2.4) for
+# unknown reasons.
+
+bind Scrollbar <Leave> {
+ if {$tk_strictMotif && [info exists tk::Priv(activeBg)]} {
+ %W config -activebackground $tk::Priv(activeBg)
+ }
+ %W activate {}
+}
+bind Scrollbar <1> {
+ tk::ScrollButtonDown %W %x %y
+}
+bind Scrollbar <B1-Motion> {
+ tk::ScrollDrag %W %x %y
+}
+bind Scrollbar <B1-B2-Motion> {
+ tk::ScrollDrag %W %x %y
+}
+bind Scrollbar <ButtonRelease-1> {
+ tk::ScrollButtonUp %W %x %y
+}
+bind Scrollbar <B1-Leave> {
+ # Prevents <Leave> binding from being invoked.
+}
+bind Scrollbar <B1-Enter> {
+ # Prevents <Enter> binding from being invoked.
+}
+bind Scrollbar <2> {
+ tk::ScrollButton2Down %W %x %y
+}
+bind Scrollbar <B1-2> {
+ # Do nothing, since button 1 is already down.
+}
+bind Scrollbar <B2-1> {
+ # Do nothing, since button 2 is already down.
+}
+bind Scrollbar <B2-Motion> {
+ tk::ScrollDrag %W %x %y
+}
+bind Scrollbar <ButtonRelease-2> {
+ tk::ScrollButtonUp %W %x %y
+}
+bind Scrollbar <B1-ButtonRelease-2> {
+ # Do nothing: B1 release will handle it.
+}
+bind Scrollbar <B2-ButtonRelease-1> {
+ # Do nothing: B2 release will handle it.
+}
+bind Scrollbar <B2-Leave> {
+ # Prevents <Leave> binding from being invoked.
+}
+bind Scrollbar <B2-Enter> {
+ # Prevents <Enter> binding from being invoked.
+}
+bind Scrollbar <Control-1> {
+ tk::ScrollTopBottom %W %x %y
+}
+bind Scrollbar <Control-2> {
+ tk::ScrollTopBottom %W %x %y
+}
+
+bind Scrollbar <Up> {
+ tk::ScrollByUnits %W v -1
+}
+bind Scrollbar <Down> {
+ tk::ScrollByUnits %W v 1
+}
+bind Scrollbar <Control-Up> {
+ tk::ScrollByPages %W v -1
+}
+bind Scrollbar <Control-Down> {
+ tk::ScrollByPages %W v 1
+}
+bind Scrollbar <Left> {
+ tk::ScrollByUnits %W h -1
+}
+bind Scrollbar <Right> {
+ tk::ScrollByUnits %W h 1
+}
+bind Scrollbar <Control-Left> {
+ tk::ScrollByPages %W h -1
+}
+bind Scrollbar <Control-Right> {
+ tk::ScrollByPages %W h 1
+}
+bind Scrollbar <Prior> {
+ tk::ScrollByPages %W hv -1
+}
+bind Scrollbar <Next> {
+ tk::ScrollByPages %W hv 1
+}
+bind Scrollbar <Home> {
+ tk::ScrollToPos %W 0
+}
+bind Scrollbar <End> {
+ tk::ScrollToPos %W 1
+}
+}
+if {[string equal [tk windowingsystem] "classic"]
+ || [string equal [tk windowingsystem] "aqua"]} {
+ bind Scrollbar <MouseWheel> {
+ tk::ScrollByUnits %W v [expr {- (%D)}]
+ }
+ bind Scrollbar <Option-MouseWheel> {
+ tk::ScrollByUnits %W v [expr {-10 * (%D)}]
+ }
+ bind Scrollbar <Shift-MouseWheel> {
+ tk::ScrollByUnits %W h [expr {- (%D)}]
+ }
+ bind Scrollbar <Shift-Option-MouseWheel> {
+ tk::ScrollByUnits %W h [expr {-10 * (%D)}]
+ }
+}
+# tk::ScrollButtonDown --
+# This procedure is invoked when a button is pressed in a scrollbar.
+# It changes the way the scrollbar is displayed and takes actions
+# depending on where the mouse is.
+#
+# Arguments:
+# w - The scrollbar widget.
+# x, y - Mouse coordinates.
+
+proc tk::ScrollButtonDown {w x y} {
+ variable ::tk::Priv
+ set Priv(relief) [$w cget -activerelief]
+ $w configure -activerelief sunken
+ set element [$w identify $x $y]
+ if {[string equal $element "slider"]} {
+ ScrollStartDrag $w $x $y
+ } else {
+ ScrollSelect $w $element initial
+ }
+}
+
+# ::tk::ScrollButtonUp --
+# This procedure is invoked when a button is released in a scrollbar.
+# It cancels scans and auto-repeats that were in progress, and restores
+# the way the active element is displayed.
+#
+# Arguments:
+# w - The scrollbar widget.
+# x, y - Mouse coordinates.
+
+proc ::tk::ScrollButtonUp {w x y} {
+ variable ::tk::Priv
+ tk::CancelRepeat
+ if {[info exists Priv(relief)]} {
+ # Avoid error due to spurious release events
+ $w configure -activerelief $Priv(relief)
+ ScrollEndDrag $w $x $y
+ $w activate [$w identify $x $y]
+ }
+}
+
+# ::tk::ScrollSelect --
+# This procedure is invoked when a button is pressed over the scrollbar.
+# It invokes one of several scrolling actions depending on where in
+# the scrollbar the button was pressed.
+#
+# Arguments:
+# w - The scrollbar widget.
+# element - The element of the scrollbar that was selected, such
+# as "arrow1" or "trough2". Shouldn't be "slider".
+# repeat - Whether and how to auto-repeat the action: "noRepeat"
+# means don't auto-repeat, "initial" means this is the
+# first action in an auto-repeat sequence, and "again"
+# means this is the second repetition or later.
+
+proc ::tk::ScrollSelect {w element repeat} {
+ variable ::tk::Priv
+ if {![winfo exists $w]} return
+ switch -- $element {
+ "arrow1" {ScrollByUnits $w hv -1}
+ "trough1" {ScrollByPages $w hv -1}
+ "trough2" {ScrollByPages $w hv 1}
+ "arrow2" {ScrollByUnits $w hv 1}
+ default {return}
+ }
+ if {[string equal $repeat "again"]} {
+ set Priv(afterId) [after [$w cget -repeatinterval] \
+ [list tk::ScrollSelect $w $element again]]
+ } elseif {[string equal $repeat "initial"]} {
+ set delay [$w cget -repeatdelay]
+ if {$delay > 0} {
+ set Priv(afterId) [after $delay \
+ [list tk::ScrollSelect $w $element again]]
+ }
+ }
+}
+
+# ::tk::ScrollStartDrag --
+# This procedure is called to initiate a drag of the slider. It just
+# remembers the starting position of the mouse and slider.
+#
+# Arguments:
+# w - The scrollbar widget.
+# x, y - The mouse position at the start of the drag operation.
+
+proc ::tk::ScrollStartDrag {w x y} {
+ variable ::tk::Priv
+
+ if {[string equal [$w cget -command] ""]} {
+ return
+ }
+ set Priv(pressX) $x
+ set Priv(pressY) $y
+ set Priv(initValues) [$w get]
+ set iv0 [lindex $Priv(initValues) 0]
+ if {[llength $Priv(initValues)] == 2} {
+ set Priv(initPos) $iv0
+ } elseif {$iv0 == 0} {
+ set Priv(initPos) 0.0
+ } else {
+ set Priv(initPos) [expr {(double([lindex $Priv(initValues) 2])) \
+ / [lindex $Priv(initValues) 0]}]
+ }
+}
+
+# ::tk::ScrollDrag --
+# This procedure is called for each mouse motion even when the slider
+# is being dragged. It notifies the associated widget if we're not
+# jump scrolling, and it just updates the scrollbar if we are jump
+# scrolling.
+#
+# Arguments:
+# w - The scrollbar widget.
+# x, y - The current mouse position.
+
+proc ::tk::ScrollDrag {w x y} {
+ variable ::tk::Priv
+
+ if {[string equal $Priv(initPos) ""]} {
+ return
+ }
+ set delta [$w delta [expr {$x - $Priv(pressX)}] [expr {$y - $Priv(pressY)}]]
+ if {[$w cget -jump]} {
+ if {[llength $Priv(initValues)] == 2} {
+ $w set [expr {[lindex $Priv(initValues) 0] + $delta}] \
+ [expr {[lindex $Priv(initValues) 1] + $delta}]
+ } else {
+ set delta [expr {round($delta * [lindex $Priv(initValues) 0])}]
+ eval [list $w] set [lreplace $Priv(initValues) 2 3 \
+ [expr {[lindex $Priv(initValues) 2] + $delta}] \
+ [expr {[lindex $Priv(initValues) 3] + $delta}]]
+ }
+ } else {
+ ScrollToPos $w [expr {$Priv(initPos) + $delta}]
+ }
+}
+
+# ::tk::ScrollEndDrag --
+# This procedure is called to end an interactive drag of the slider.
+# It scrolls the window if we're in jump mode, otherwise it does nothing.
+#
+# Arguments:
+# w - The scrollbar widget.
+# x, y - The mouse position at the end of the drag operation.
+
+proc ::tk::ScrollEndDrag {w x y} {
+ variable ::tk::Priv
+
+ if {[string equal $Priv(initPos) ""]} {
+ return
+ }
+ if {[$w cget -jump]} {
+ set delta [$w delta [expr {$x - $Priv(pressX)}] \
+ [expr {$y - $Priv(pressY)}]]
+ ScrollToPos $w [expr {$Priv(initPos) + $delta}]
+ }
+ set Priv(initPos) ""
+}
+
+# ::tk::ScrollByUnits --
+# This procedure tells the scrollbar's associated widget to scroll up
+# or down by a given number of units. It notifies the associated widget
+# in different ways for old and new command syntaxes.
+#
+# Arguments:
+# w - The scrollbar widget.
+# orient - Which kinds of scrollbars this applies to: "h" for
+# horizontal, "v" for vertical, "hv" for both.
+# amount - How many units to scroll: typically 1 or -1.
+
+proc ::tk::ScrollByUnits {w orient amount} {
+ set cmd [$w cget -command]
+ if {[string equal $cmd ""] || ([string first \
+ [string index [$w cget -orient] 0] $orient] < 0)} {
+ return
+ }
+ set info [$w get]
+ if {[llength $info] == 2} {
+ uplevel #0 $cmd scroll $amount units
+ } else {
+ uplevel #0 $cmd [expr {[lindex $info 2] + $amount}]
+ }
+}
+
+# ::tk::ScrollByPages --
+# This procedure tells the scrollbar's associated widget to scroll up
+# or down by a given number of screenfuls. It notifies the associated
+# widget in different ways for old and new command syntaxes.
+#
+# Arguments:
+# w - The scrollbar widget.
+# orient - Which kinds of scrollbars this applies to: "h" for
+# horizontal, "v" for vertical, "hv" for both.
+# amount - How many screens to scroll: typically 1 or -1.
+
+proc ::tk::ScrollByPages {w orient amount} {
+ set cmd [$w cget -command]
+ if {[string equal $cmd ""] || ([string first \
+ [string index [$w cget -orient] 0] $orient] < 0)} {
+ return
+ }
+ set info [$w get]
+ if {[llength $info] == 2} {
+ uplevel #0 $cmd scroll $amount pages
+ } else {
+ uplevel #0 $cmd [expr {[lindex $info 2] + $amount*([lindex $info 1] - 1)}]
+ }
+}
+
+# ::tk::ScrollToPos --
+# This procedure tells the scrollbar's associated widget to scroll to
+# a particular location, given by a fraction between 0 and 1. It notifies
+# the associated widget in different ways for old and new command syntaxes.
+#
+# Arguments:
+# w - The scrollbar widget.
+# pos - A fraction between 0 and 1 indicating a desired position
+# in the document.
+
+proc ::tk::ScrollToPos {w pos} {
+ set cmd [$w cget -command]
+ if {[string equal $cmd ""]} {
+ return
+ }
+ set info [$w get]
+ if {[llength $info] == 2} {
+ uplevel #0 $cmd moveto $pos
+ } else {
+ uplevel #0 $cmd [expr {round([lindex $info 0]*$pos)}]
+ }
+}
+
+# ::tk::ScrollTopBottom
+# Scroll to the top or bottom of the document, depending on the mouse
+# position.
+#
+# Arguments:
+# w - The scrollbar widget.
+# x, y - Mouse coordinates within the widget.
+
+proc ::tk::ScrollTopBottom {w x y} {
+ variable ::tk::Priv
+ set element [$w identify $x $y]
+ if {[string match *1 $element]} {
+ ScrollToPos $w 0
+ } elseif {[string match *2 $element]} {
+ ScrollToPos $w 1
+ }
+
+ # Set Priv(relief), since it's needed by tk::ScrollButtonUp.
+
+ set Priv(relief) [$w cget -activerelief]
+}
+
+# ::tk::ScrollButton2Down
+# This procedure is invoked when button 2 is pressed over a scrollbar.
+# If the button is over the trough or slider, it sets the scrollbar to
+# the mouse position and starts a slider drag. Otherwise it just
+# behaves the same as button 1.
+#
+# Arguments:
+# w - The scrollbar widget.
+# x, y - Mouse coordinates within the widget.
+
+proc ::tk::ScrollButton2Down {w x y} {
+ variable ::tk::Priv
+ set element [$w identify $x $y]
+ if {[string match {arrow[12]} $element]} {
+ ScrollButtonDown $w $x $y
+ return
+ }
+ ScrollToPos $w [$w fraction $x $y]
+ set Priv(relief) [$w cget -activerelief]
+
+ # Need the "update idletasks" below so that the widget calls us
+ # back to reset the actual scrollbar position before we start the
+ # slider drag.
+
+ update idletasks
+ $w configure -activerelief sunken
+ $w activate slider
+ ScrollStartDrag $w $x $y
+}