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#! /usr/bin/env tclsh
package require Tk 8.5-
# Copyright (c) 2005-2023 Keith Nash.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
### This demo explores the ntext options
### For a short example, see ntextExample.tcl
### To explore ntext indentation, try ntextDemoIndent.tcl
### To explore vertical scrolling on the Mac, try ntextDemoMacScrolling.tcl
### For corner cases in scrolling, try ntextDemoScroll.tcl
# This string defines the text that will be displayed in each widget:
set message {Try editing the text with the keyboard and mouse; compare the bindings for Text (left panel) and Ntext (right panel).
Try word-by-word navigation (Control key with left cursor or right cursor key); try word selection (double click); try these for the different word-break detection options, adjustable in the control panel.
The classicMouseSelect and classicAnchor options are discussed in the man page for ntextBindings.
QOTW: "C/C++, which is used by 16% of users, is the most popular programming language, but Tcl, used by 0%, seems to be the language of choice for the highest scoring users."
example code {alph {bet {b}} {gam {c}}} {
# Example code rich in punctuation
if {!($alph eq "a" && $bet eq "b")} {
puts "$gam $::messages::demo(d)"
}
}}
# End of string for widget text.
package require ntext 1.0
# Whether Shift-Button-1 ignores changes made by the kbd to the insert mark:
set ::ntext::classicMouseSelect 0
# Whether Shift-Button-1 has a variable or fixed anchor:
set ::ntext::classicAnchor 0
# Whether the traditional "extra" bindings are activated (default is 0):
set ::ntext::classicExtras 1
# Whether to use new or classic word boundary detection:
set ::ntext::classicWordBreak 0
# Set to 0 to align wrapped display lines with the first display line of the logical line:
set ::ntext::classicWrap 1
# Set to 0 to follow Mac Aqua conventions on placement of the insert mark
# when a selection is cancelled by keyboard navigation:
# Has effect on all platforms. Default value is 0 on Aqua, 1 on other platforms.
# set ::ntext::classicSelection 1
# ------------------------------------------------------------------------------
# Now begin constructing the GUI.
# ------------------------------------------------------------------------------
set col #e0dfde
. configure -bg $col
pack [frame .f -bg $col] -side right -anchor e
pack [frame .cp -bg $col -bd 2p -relief ridge] -anchor ne -in .f
pack [label .cp2 -bg $col -text "(These options are applied only\n to the right-hand text widget)"] -anchor n -pady 4p -in .f
pack [frame .rhf -bg $col] -side right -anchor ne
pack [text .rhf.new ] -padx 2
.rhf.new configure -wrap word -undo 1
.rhf.new configure -width 42 -height 29 -font TkFixedFont -bg white
.rhf.new insert end " I use the Ntext bindings.\n\n$message"
.rhf.new edit separator
pack [frame .lhf -bg $col] -side left -anchor ne
pack [text .lhf.classic ] -padx 2
.lhf.classic configure -width 42 -height 29 -wrap word -undo 1 -font TkFixedFont -bg #FFFFCC
.lhf.classic insert end " I use the (default) Text bindings.\n\n$message"
.lhf.classic edit separator
# What is the largest font such that the demo will fit on the screen?
# Allow 100 pixels or 1 inch for desktop panels that are not counted in wm maxsize.
# Reduce the font if necessary.
set siz [font actual TkFixedFont -size]
set maxPts [expr { ([lindex [wm maxsize .] 1] - 6 - max (100., 72. * [tk scaling])) * $siz / ([winfo reqheight .lhf.classic] - 6) }]
set siz [expr { int(min($siz, $maxPts)) }]
font configure TkFixedFont -size $siz
set fam [font actual TkFixedFont -family]
set TitleFixedFont [list $fam $siz bold]
.lhf.classic tag add red 1.0 2.0
.rhf.new tag add blue 1.0 2.0
.lhf.classic tag configure red -foreground #A00000 -font $TitleFixedFont
.rhf.new tag configure blue -foreground #0000A0 -font $TitleFixedFont
# Use the ntext bindings in .rhf.new --
bindtags .rhf.new {.rhf.new Ntext . all}
# ------------------------------------------------------------------------------
# The code below populates frame .cp and implements the
# control panel for selecting ntext configuration options.
# ------------------------------------------------------------------------------
set col2 #f0efee
set col3 #d0cfce
font configure TkDefaultFont -size $siz
set fam [font actual TkDefaultFont -family]
set TitleVariableFont [list $fam $siz bold]
proc radiobutton2 {w args} {
radiobutton23 $w 2 {*}$args
}
proc radiobutton3 {w args} {
radiobutton23 $w 3 {*}$args
}
proc radiobutton23 {w num args} {
if {$num == 2} {
set bg $::col2
set ab $::col3
} else {
set bg $::col3
set ab $::col2
}
frame $w -bg $bg
radiobutton $w.rb -bg $bg -activebackground $ab -highlightthickness 0 -padx 4p -pady 2p -anchor w {*}$args
pack $w.rb -expand 1 -fill both -pady 2p
return $w
}
label .cp.n:l -bg $col2 -text "Options for ntext bindings" -font $TitleVariableFont
grid .cp.n:l -ipady 2 -sticky ewn -columnspan 3
label .cp.h:l -bg $col3 -anchor e -text "classicMouseSelect: "
radiobutton3 .cp.h:off -text "Off" -variable ::ntext::classicMouseSelect -value 0
radiobutton3 .cp.h:on -text "On " -variable ::ntext::classicMouseSelect -value 1
grid .cp.h:l .cp.h:off .cp.h:on -ipady 2 -sticky ewns
label .cp.g:l -bg $col2 -anchor e -text "classicAnchor: "
radiobutton2 .cp.g:off -text "Off" -variable ::ntext::classicAnchor -value 0
radiobutton2 .cp.g:on -text "On " -variable ::ntext::classicAnchor -value 1
grid .cp.g:l .cp.g:off .cp.g:on -ipady 2 -sticky ewns
label .cp.k:l -bg $col3 -anchor e -text "classicExtras: "
radiobutton3 .cp.k:off -text "Off" -variable ::ntext::classicExtras -value 0
radiobutton3 .cp.k:on -text "On " -variable ::ntext::classicExtras -value 1
grid .cp.k:l .cp.k:off .cp.k:on -ipady 2 -sticky ewns
label .cp.m:l -bg $col2 -anchor e -text "classicSelection: "
radiobutton2 .cp.m:off -text "Off" -variable ::ntext::classicSelection -value 0
radiobutton2 .cp.m:on -text "On " -variable ::ntext::classicSelection -value 1
grid .cp.m:l .cp.m:off .cp.m:on -ipady 2 -sticky ewns
set wordBreakChoice new
label .cp.j:l -bg $col3 -anchor e -text "classicWordBreak: "
radiobutton3 .cp.j:off -text "Off" -variable wordBreakChoice -value "new" -command setPattern
radiobutton3 .cp.j:unix -text "On (Unix)" -variable wordBreakChoice -value "unix" -command setPattern
radiobutton3 .cp.j:wind -text "On (Windows)" -variable wordBreakChoice -value "windows" -command setPattern
frame .cp.j:sp1 -bg $col3
frame .cp.j:sp2 -bg $col3
grid .cp.j:l .cp.j:off .cp.j:unix -ipady 2 -sticky ewns
grid .cp.j:sp1 .cp.j:sp2 .cp.j:wind -ipady 2 -sticky ewns
proc setPattern {} {
global wordBreakChoice
set platform $::tcl_platform(platform)
if {$wordBreakChoice eq "unix"} {
set ::tcl_platform(platform) unix
set ::ntext::classicWordBreak 1
} elseif {$wordBreakChoice eq "windows"} {
set ::tcl_platform(platform) windows
set ::ntext::classicWordBreak 1
} else {
set ::ntext::classicWordBreak 0
}
::ntext::initializeMatchPatterns
set ::tcl_platform(platform) $platform
}
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