Version 24 of snitbutton
Updated 2004-09-27 15:53:36DESCRIPTION
DDG 2004-06-10: A working snit-port of the gbuttons-widget that uses itcl. That way the wikit-tkGui can also be used on platforms where itcl is not available (like MacOS 9). Maybe command renaming is a better approach than naming the package gbutton. But that's more than I can do. Any suggestions how to do this? In order to test the code below grab the latest wikit.kit from [L1 ], unwrap it, remove gbutton, add snitbutton and snit. Rewrap it, that's all!
SOURCE
;; This buffer is for notes you don't want to save, and for Lisp evaluation.
;; If you want to create a file, first visit that file with C-x C-f,
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#
# snitbutton.tcl
#
# Copyright (c) 2001-2002 by Steve Landers <steve (at) digital-smarties.com>
# Copyright (c) 2004 by Dr. Detlef Groth <detlef (at) dgroth.de>
# porting to the snit framework
# Copyright (c) 2004 by Uwe Koloska <uwe (at) koloro.de>
# removing the errors taken from the original
#
# Changes:
# - width is now the width of the buttons
# - the background of the standardbuttons is transparent
# and thus the background of the widget is now visible
# - options are now interpreted if used as gButton
# - sizes are now calculated the right way and honoured
#
# Bugs:
# - there is no "#auto" and thus this package cannot replace gbutton in
# wikit
package provide snitButton 0.4
package provide gbutton 0.4
package require Tk
package require snit 0.93
# this is a wrapper type for the snitButton, simply remove the gbutton dir and
# add the snitbutton and the snit-dir to replace the itcl based gbutton.
snit::type gButton {
variable sb
delegate option * to sb
delegate method * to sb
constructor {path args} {
set sb [eval snitButton $path.p $args]
pack $sb -side left -fill x -expand no
}
proc modify {args} { eval ::snitButton::modify $args }
proc cget {args} { eval ::snitButton::cget $args }
proc init {args} { }
}
snit::widget snitButton {
variable canvas ""
variable over
variable numbut 0
variable wid
variable ht
variable command
option -padx 0
option -pady 0
option -font ""
option -bg ""
option -fill ""
option -activefill ""
option -disabledfill ""
typevariable numobj 0
typevariable textopts
typevariable imageopts
typevariable button
typevariable up_img ""
typevariable down_img ""
typevariable disabled_img ""
typevariable path ""
constructor {args} {
#installhull $win
$self configurelist $args
set ht [expr {[image height $up_img] + 2*$options(-pady)}]
set wid [expr {[image width $up_img] + 2*$options(-padx)}]
set canvas [canvas $win.c$numobj -height $ht -width $wid \
-highlightthickness 0]
if { $options(-bg) ne ""} {
$canvas configure -background $options(-bg)
}
pack $canvas -padx 0 -pady 0
incr numobj
}
proc path {dir} {
set path $dir
}
proc init_opts {canv text} {
foreach arg [lsort [$canv itemconfigure img_$text]] {
set imageopts([lindex $arg 0]) 1
}
foreach arg [lsort [$canv itemconfigure txt_$text]] {
set textopts([lindex $arg 0]) 1
}
}
proc locate {text} {
return $button($text)
}
proc modify {text args} {
if {[info exists button($text)]} {
#puts "$text $args"
eval $button($text) config $text $args
}
}
proc cget {text opt} {
if {[info exists button($text)]} {
eval $button($text) get $text $opt
}
}
method new {text {cmd ""}} {
set x [expr {$numbut * $wid + $options(-padx)}]
set y $options(-pady)
set tag0 [$canvas create image $x $y -image $up_img -tag img_$text \
-anchor nw]
$canvas bind $tag0 <ButtonPress-1> [list $self press $text down]
$canvas bind $tag0 <ButtonRelease-1> [list $self release $text]
set command($text) $cmd
set x [expr {$x + $wid/2 - $options(-padx)}]
set y [expr {$y + $ht/2 - $options(-pady)}]
set tag1 [$canvas create text $x $y -tag txt_$text -anchor center \
-text $text]
$canvas bind $tag1 <ButtonPress-1> [list $self press $text down]
$canvas bind $tag1 <ButtonRelease-1> [list $self release $text]
if {$disabled_img != ""} {
$canvas itemconfigure $tag0 -disabledimage $disabled_img
}
if {$options(-fill) != ""} {
$canvas itemconfigure $tag1 -fill $options(-fill)
}
if {$options(-activefill) != ""} {
$canvas itemconfigure $tag1 -activefill $options(-activefill)
}
if {$options(-disabledfill) != ""} {
$canvas itemconfigure $tag1 -disabledfill $options(-disabledfill)
}
if {$options(-font) != ""} {
$canvas itemconfigure $tag1 -font $options(-font)
}
set button($text) [list $self]
incr numbut
if {[array size textopts] == 0} {
init_opts $canvas $text
}
$self size
}
method config {text args} {
foreach {opt arg} $args {
if {$opt == "-command"} {
set command($text) $arg
} else {
if {[info exists imageopts($opt)]} {
$canvas itemconfigure img_$text $opt $arg
}
if {[info exists textopts($opt)]} {
$canvas itemconfigure txt_$text $opt $arg
}
}
}
}
method get {text opt} {
set result ""
if {[info exists textopts($opt)]} {
set result [$canvas itemcget txt_$text $opt]
} elseif {[info exists imageopts($opt)]} {
set result [$canvas itemcget img_$text $opt]
}
return $result
}
method press {text event} {
if {[string equal $event up]} {
$canvas itemconfigure img_$text -image $up_img
} else {
$canvas itemconfigure img_$text -image $down_img
}
}
method release {text} {
$self press $text up
# Do we need to make this "after idle", in case the command is
# long running? Perhaps it is best done in the calling
# application if needed
uplevel #0 $command($text)
}
method size {} {
$canvas configure -width [expr {$numbut * $wid}]
}
typeconstructor {
set path [file dirname [info script]]
set up_img [image create photo -data {
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////////////////////////////////////////////////////////////
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}]
set disabled_img [image create photo -data {
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2dra2tvb29bW1tfX19TU1NXV1djY2NPT09HR0c/Pz97e3v//////////////
////////////////////////////////////////////////////////////
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}
]
set down_img [image create photo -data {
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}
]
}
}The pkgIndex.tcl should be like this:
package ifneeded snitButton 0.3 [list source [file join $dir snitbutton.tcl]] package ifneeded gbutton 0.4 [list source [file join $dir snitbutton.tcl]]
Please consider submitting a Feature Request to the sf.net site for tklib to have this package added to tklib!
DDG: Did this request on SF [L2 ].
EXAMPLE
if {0} {
pack [snitButton .t] -side top -fill x -expand no
set b0 .t
$b0 new Back
$b0 new Forward
$b0 new Home
snitButton::modify Back -command [list Cmd 0]
snitButton::modify Forward -command [list Cmd 1]
snitButton::modify Forward -state disabled
proc Cmd {state} {
tk_messageBox -type ok -message "Cmd"
if {$state == 0} {
snitButton::modify Forward -state normal
snitButton::modify Back -state disabled
} else {
snitButton::modify Forward -state disabled
snitButton::modify Back -state normal
}
}
}
stevel - Great work!
UKo 2004-09-26: it can't work as an replacement for gbutton in wikit, cause there is no such thing as #auto and the memberfunction init doesn't exist.
What is the best way to submit changes to this package? Change the code here on this page (the old code is in the versioning system)?
DDG 2004-09-27: As far as I understand you mean the lines with:
set b0 [gButton #auto $top.n.f0]
however this should not give a problem. Because it creates a command #auto, which is useless but not harmful. In order to test this I went to equi4.com, grabbed the latest wikit.kit, unwrappped it and removed the gbutton-dir and were adding the snitbutton-dir and snit. Have you really failed with this procedure ? The function init exists also, look at the member-proc init inside the gbutton-type.
UKo 2004-09-27: there are two lines with '#auto' and thus the second one mourns "command ::#auto already exists".
DDG 2004-09-27: Hmm, should complain but I don't get an error:
% package require Tk 8.4 % package require snit 0.93 0.93 % package require gbutton 0.4 % frame .f0 .f0 % frame .f2 .f2 % set b0 [gButton #auto .f0] ::#auto % set b2 [gButton #auto .f2] ::#auto % $b0 new Back % $b2 new Back2 % pack .f0 .f2
It installs two times the same command without error (TclTk8.4.6) ?!
UKo 2004-09-27:
And the init procedure of gButton points to snitButton::init which does not exist (at least in the version present on this page.
DDG 2004-09-27: That's true and I missed it because inside wikit/gui.tcl the gButton::init procedure is inside a catch block. We may add a snitButton::init procedure or just delete the proc inside the gbutton-wrapper, because the only use of the wrapper should enabling wikit-gui-help.
UKo 2004-09-27: No! init is used to set default values for the options that a gbutton object is created with.
UKo 2004-09-27:
gButtons and thus snitButtons have some bugs that I have solved:
- width is always the inital width of the canvas
- background of the standardimages is white and thus cannot be changed
- sizes (pady and wid) are not calculated right
- (snitButton) options are not evaluated when given to gButton
Here's a simple example that shows this problems:
package require Tk lappend auto_path . package require snit 0.93 package require snitButton . configure -padx 8 -pady 8 set b1 [snitButton .t1 -bg red] set b2 [snitButton .t2 -bg yellow] set b3 [snitButton .t3 -bg green] pack $b1 $b2 $b3 -side top $b1 new 1 $b2 new 2; $b2 new 3 $b3 new 4; $b3 new 5; $b3 new 6
Do you have another version? The only problems I was not able to solve are
- #auto must be interpreted by snit or changed to %AUTO%
- i haven't found a possibility to change the default options (that's what the init procedure is supposed to do) The default options are set while creating the type but I haven't found a way to change them after this -- how can a typemethod access the internal array options?
DDG 2004-09-27: If you solved a bug, improved the snit::type just feel free to add/change the code on this page. Changing, the Font,Color etc should be done via options like -font and an configure-handler which delegates the option accordingly to the right canvas item..
UKo 2004-09-27: OK, I have changed to source above. And like I've said above, the init can help avoid lots of the same -font or similar config flags while creating the snitButton objects. If you want all your buttons with font f you can say
snitButton::init -font f
Maybe there is a place in snit to change the default settings for object options.
See also
- gbuttons (buttons)
- Lightbutton (radio & checkbuttons)