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| Current File : //usr/share/tk8.5/comdlg.tcl |
# comdlg.tcl --
#
# Some functions needed for the common dialog boxes. Probably need to go
# in a different file.
#
# Copyright (c) 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.
#
# tclParseConfigSpec --
#
# Parses a list of "-option value" pairs. If all options and
# values are legal, the values are stored in
# $data($option). Otherwise an error message is returned. When
# an error happens, the data() array may have been partially
# modified, but all the modified members of the data(0 array are
# guaranteed to have valid values. This is different than
# Tk_ConfigureWidget() which does not modify the value of a
# widget record if any error occurs.
#
# Arguments:
#
# w = widget record to modify. Must be the pathname of a widget.
#
# specs = {
# {-commandlineswitch resourceName ResourceClass defaultValue verifier}
# {....}
# }
#
# flags = currently unused.
#
# argList = The list of "-option value" pairs.
#
proc tclParseConfigSpec {w specs flags argList} {
upvar #0 $w data
# 1: Put the specs in associative arrays for faster access
#
foreach spec $specs {
if {[llength $spec] < 4} {
error "\"spec\" should contain 5 or 4 elements"
}
set cmdsw [lindex $spec 0]
set cmd($cmdsw) ""
set rname($cmdsw) [lindex $spec 1]
set rclass($cmdsw) [lindex $spec 2]
set def($cmdsw) [lindex $spec 3]
set verproc($cmdsw) [lindex $spec 4]
}
if {[llength $argList] & 1} {
set cmdsw [lindex $argList end]
if {![info exists cmd($cmdsw)]} {
error "bad option \"$cmdsw\": must be [tclListValidFlags cmd]"
}
error "value for \"$cmdsw\" missing"
}
# 2: set the default values
#
foreach cmdsw [array names cmd] {
set data($cmdsw) $def($cmdsw)
}
# 3: parse the argument list
#
foreach {cmdsw value} $argList {
if {![info exists cmd($cmdsw)]} {
error "bad option \"$cmdsw\": must be [tclListValidFlags cmd]"
}
set data($cmdsw) $value
}
# Done!
}
proc tclListValidFlags {v} {
upvar $v cmd
set len [llength [array names cmd]]
set i 1
set separator ""
set errormsg ""
foreach cmdsw [lsort [array names cmd]] {
append errormsg "$separator$cmdsw"
incr i
if {$i == $len} {
set separator ", or "
} else {
set separator ", "
}
}
return $errormsg
}
#----------------------------------------------------------------------
#
# Focus Group
#
# Focus groups are used to handle the user's focusing actions inside a
# toplevel.
#
# One example of using focus groups is: when the user focuses on an
# entry, the text in the entry is highlighted and the cursor is put to
# the end of the text. When the user changes focus to another widget,
# the text in the previously focused entry is validated.
#
#----------------------------------------------------------------------
# ::tk::FocusGroup_Create --
#
# Create a focus group. All the widgets in a focus group must be
# within the same focus toplevel. Each toplevel can have only
# one focus group, which is identified by the name of the
# toplevel widget.
#
proc ::tk::FocusGroup_Create {t} {
variable ::tk::Priv
if {[winfo toplevel $t] ne $t} {
error "$t is not a toplevel window"
}
if {![info exists Priv(fg,$t)]} {
set Priv(fg,$t) 1
set Priv(focus,$t) ""
bind $t <FocusIn> [list tk::FocusGroup_In $t %W %d]
bind $t <FocusOut> [list tk::FocusGroup_Out $t %W %d]
bind $t <Destroy> [list tk::FocusGroup_Destroy $t %W]
}
}
# ::tk::FocusGroup_BindIn --
#
# Add a widget into the "FocusIn" list of the focus group. The $cmd will be
# called when the widget is focused on by the user.
#
proc ::tk::FocusGroup_BindIn {t w cmd} {
variable FocusIn
variable ::tk::Priv
if {![info exists Priv(fg,$t)]} {
error "focus group \"$t\" doesn't exist"
}
set FocusIn($t,$w) $cmd
}
# ::tk::FocusGroup_BindOut --
#
# Add a widget into the "FocusOut" list of the focus group. The
# $cmd will be called when the widget loses the focus (User
# types Tab or click on another widget).
#
proc ::tk::FocusGroup_BindOut {t w cmd} {
variable FocusOut
variable ::tk::Priv
if {![info exists Priv(fg,$t)]} {
error "focus group \"$t\" doesn't exist"
}
set FocusOut($t,$w) $cmd
}
# ::tk::FocusGroup_Destroy --
#
# Cleans up when members of the focus group is deleted, or when the
# toplevel itself gets deleted.
#
proc ::tk::FocusGroup_Destroy {t w} {
variable FocusIn
variable FocusOut
variable ::tk::Priv
if {$t eq $w} {
unset Priv(fg,$t)
unset Priv(focus,$t)
foreach name [array names FocusIn $t,*] {
unset FocusIn($name)
}
foreach name [array names FocusOut $t,*] {
unset FocusOut($name)
}
} else {
if {[info exists Priv(focus,$t)] && ($Priv(focus,$t) eq $w)} {
set Priv(focus,$t) ""
}
unset -nocomplain FocusIn($t,$w) FocusOut($t,$w)
}
}
# ::tk::FocusGroup_In --
#
# Handles the <FocusIn> event. Calls the FocusIn command for the newly
# focused widget in the focus group.
#
proc ::tk::FocusGroup_In {t w detail} {
variable FocusIn
variable ::tk::Priv
if {$detail ne "NotifyNonlinear" && $detail ne "NotifyNonlinearVirtual"} {
# This is caused by mouse moving out&in of the window *or*
# ordinary keypresses some window managers (ie: CDE [Bug: 2960]).
return
}
if {![info exists FocusIn($t,$w)]} {
set FocusIn($t,$w) ""
return
}
if {![info exists Priv(focus,$t)]} {
return
}
if {$Priv(focus,$t) eq $w} {
# This is already in focus
#
return
} else {
set Priv(focus,$t) $w
eval $FocusIn($t,$w)
}
}
# ::tk::FocusGroup_Out --
#
# Handles the <FocusOut> event. Checks if this is really a lose
# focus event, not one generated by the mouse moving out of the
# toplevel window. Calls the FocusOut command for the widget
# who loses its focus.
#
proc ::tk::FocusGroup_Out {t w detail} {
variable FocusOut
variable ::tk::Priv
if {$detail ne "NotifyNonlinear" && $detail ne "NotifyNonlinearVirtual"} {
# This is caused by mouse moving out of the window
return
}
if {![info exists Priv(focus,$t)]} {
return
}
if {![info exists FocusOut($t,$w)]} {
return
} else {
eval $FocusOut($t,$w)
set Priv(focus,$t) ""
}
}
# ::tk::FDGetFileTypes --
#
# Process the string given by the -filetypes option of the file
# dialogs. Similar to the C function TkGetFileFilters() on the Mac
# and Windows platform.
#
proc ::tk::FDGetFileTypes {string} {
foreach t $string {
if {[llength $t] < 2 || [llength $t] > 3} {
error "bad file type \"$t\", should be \"typeName {extension ?extensions ...?} ?{macType ?macTypes ...?}?\""
}
lappend fileTypes([lindex $t 0]) {*}[lindex $t 1]
}
set types {}
foreach t $string {
set label [lindex $t 0]
set exts {}
if {[info exists hasDoneType($label)]} {
continue
}
# Validate each macType. This is to agree with the
# behaviour of TkGetFileFilters(). This list may be
# empty.
foreach macType [lindex $t 2] {
if {[string length $macType] != 4} {
error "bad Macintosh file type \"$macType\""
}
}
set name "$label \("
set sep ""
set doAppend 1
foreach ext $fileTypes($label) {
if {$ext eq ""} {
continue
}
regsub {^[.]} $ext "*." ext
if {![info exists hasGotExt($label,$ext)]} {
if {$doAppend} {
if {[string length $sep] && [string length $name]>40} {
set doAppend 0
append name $sep...
} else {
append name $sep$ext
}
}
lappend exts $ext
set hasGotExt($label,$ext) 1
}
set sep ","
}
append name "\)"
lappend types [list $name $exts]
set hasDoneType($label) 1
}
return $types
}