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| Current File : //usr/share/tk8.5/choosedir.tcl |
# choosedir.tcl --
#
# Choose directory dialog implementation for Unix/Mac.
#
# Copyright (c) 1998-2000 by Scriptics Corporation.
# All rights reserved.
# Make sure the tk::dialog namespace, in which all dialogs should live, exists
namespace eval ::tk::dialog {}
namespace eval ::tk::dialog::file {}
# Make the chooseDir namespace inside the dialog namespace
namespace eval ::tk::dialog::file::chooseDir {
namespace import -force ::tk::msgcat::*
}
# ::tk::dialog::file::chooseDir:: --
#
# Implements the TK directory selection dialog.
#
# Arguments:
# args Options parsed by the procedure.
#
proc ::tk::dialog::file::chooseDir:: {args} {
variable ::tk::Priv
set dataName __tk_choosedir
upvar ::tk::dialog::file::$dataName data
Config $dataName $args
if {$data(-parent) eq "."} {
set w .$dataName
} else {
set w $data(-parent).$dataName
}
# (re)create the dialog box if necessary
#
if {![winfo exists $w]} {
::tk::dialog::file::Create $w TkChooseDir
} elseif {[winfo class $w] ne "TkChooseDir"} {
destroy $w
::tk::dialog::file::Create $w TkChooseDir
} else {
set data(dirMenuBtn) $w.contents.f1.menu
set data(dirMenu) $w.contents.f1.menu.menu
set data(upBtn) $w.contents.f1.up
set data(icons) $w.contents.icons
set data(ent) $w.contents.f2.ent
set data(okBtn) $w.contents.f2.ok
set data(cancelBtn) $w.contents.f2.cancel
set data(hiddenBtn) $w.contents.f2.hidden
}
if {$::tk::dialog::file::showHiddenBtn} {
$data(hiddenBtn) configure -state normal
grid $data(hiddenBtn)
} else {
$data(hiddenBtn) configure -state disabled
grid remove $data(hiddenBtn)
}
# When using -mustexist, manage the OK button state for validity
$data(okBtn) configure -state normal
if {$data(-mustexist)} {
$data(ent) configure -validate key \
-validatecommand [list ::tk::dialog::file::chooseDir::IsOK? $w %P]
} else {
$data(ent) configure -validate none
}
# Dialog boxes should be transient with respect to their parent,
# so that they will always stay on top of their parent window. However,
# some window managers will create the window as withdrawn if the parent
# window is withdrawn or iconified. Combined with the grab we put on the
# window, this can hang the entire application. Therefore we only make
# the dialog transient if the parent is viewable.
if {[winfo viewable [winfo toplevel $data(-parent)]] } {
wm transient $w $data(-parent)
}
trace add variable data(selectPath) write \
[list ::tk::dialog::file::SetPath $w]
$data(dirMenuBtn) configure \
-textvariable ::tk::dialog::file::${dataName}(selectPath)
set data(filter) "*"
set data(previousEntryText) ""
::tk::dialog::file::UpdateWhenIdle $w
# Withdraw the window, then update all the geometry information
# so we know how big it wants to be, then center the window in the
# display (Motif style) and de-iconify it.
::tk::PlaceWindow $w widget $data(-parent)
wm title $w $data(-title)
# Set a grab and claim the focus too.
::tk::SetFocusGrab $w $data(ent)
$data(ent) delete 0 end
$data(ent) insert 0 $data(selectPath)
$data(ent) selection range 0 end
$data(ent) icursor end
# Wait for the user to respond, then restore the focus and
# return the index of the selected button. Restore the focus
# before deleting the window, since otherwise the window manager
# may take the focus away so we can't redirect it. Finally,
# restore any grab that was in effect.
vwait ::tk::Priv(selectFilePath)
::tk::RestoreFocusGrab $w $data(ent) withdraw
# Cleanup traces on selectPath variable
#
foreach trace [trace info variable data(selectPath)] {
trace remove variable data(selectPath) [lindex $trace 0] [lindex $trace 1]
}
$data(dirMenuBtn) configure -textvariable {}
# Return value to user
#
return $Priv(selectFilePath)
}
# ::tk::dialog::file::chooseDir::Config --
#
# Configures the Tk choosedir dialog according to the argument list
#
proc ::tk::dialog::file::chooseDir::Config {dataName argList} {
upvar ::tk::dialog::file::$dataName data
# 0: Delete all variable that were set on data(selectPath) the
# last time the file dialog is used. The traces may cause troubles
# if the dialog is now used with a different -parent option.
#
foreach trace [trace info variable data(selectPath)] {
trace remove variable data(selectPath) [lindex $trace 0] [lindex $trace 1]
}
# 1: the configuration specs
#
set specs {
{-mustexist "" "" 0}
{-initialdir "" "" ""}
{-parent "" "" "."}
{-title "" "" ""}
}
# 2: default values depending on the type of the dialog
#
if {![info exists data(selectPath)]} {
# first time the dialog has been popped up
set data(selectPath) [pwd]
}
# 3: parse the arguments
#
tclParseConfigSpec ::tk::dialog::file::$dataName $specs "" $argList
if {$data(-title) eq ""} {
set data(-title) "[mc "Choose Directory"]"
}
# Stub out the -multiple value for the dialog; it doesn't make sense for
# choose directory dialogs, but we have to have something there because we
# share so much code with the file dialogs.
set data(-multiple) 0
# 4: set the default directory and selection according to the -initial
# settings
#
if {$data(-initialdir) ne ""} {
# Ensure that initialdir is an absolute path name.
if {[file isdirectory $data(-initialdir)]} {
set old [pwd]
cd $data(-initialdir)
set data(selectPath) [pwd]
cd $old
} else {
set data(selectPath) [pwd]
}
}
if {![winfo exists $data(-parent)]} {
error "bad window path name \"$data(-parent)\""
}
}
# Gets called when user presses Return in the "Selection" entry or presses OK.
#
proc ::tk::dialog::file::chooseDir::OkCmd {w} {
upvar ::tk::dialog::file::[winfo name $w] data
# This is the brains behind selecting non-existant directories. Here's
# the flowchart:
# 1. If the icon list has a selection, join it with the current dir,
# and return that value.
# 1a. If the icon list does not have a selection ...
# 2. If the entry is empty, do nothing.
# 3. If the entry contains an invalid directory, then...
# 3a. If the value is the same as last time through here, end dialog.
# 3b. If the value is different than last time, save it and return.
# 4. If entry contains a valid directory, then...
# 4a. If the value is the same as the current directory, end dialog.
# 4b. If the value is different from the current directory, change to
# that directory.
set selection [tk::IconList_CurSelection $data(icons)]
if {[llength $selection] != 0} {
set iconText [tk::IconList_Get $data(icons) [lindex $selection 0]]
set iconText [file join $data(selectPath) $iconText]
Done $w $iconText
} else {
set text [$data(ent) get]
if {$text eq ""} {
return
}
set text [file join {*}[file split [string trim $text]]]
if {![file exists $text] || ![file isdirectory $text]} {
# Entry contains an invalid directory. If it's the same as the
# last time they came through here, reset the saved value and end
# the dialog. Otherwise, save the value (so we can do this test
# next time).
if {$text eq $data(previousEntryText)} {
set data(previousEntryText) ""
Done $w $text
} else {
set data(previousEntryText) $text
}
} else {
# Entry contains a valid directory. If it is the same as the
# current directory, end the dialog. Otherwise, change to that
# directory.
if {$text eq $data(selectPath)} {
Done $w $text
} else {
set data(selectPath) $text
}
}
}
return
}
# Change state of OK button to match -mustexist correctness of entry
#
proc ::tk::dialog::file::chooseDir::IsOK? {w text} {
upvar ::tk::dialog::file::[winfo name $w] data
set ok [file isdirectory $text]
$data(okBtn) configure -state [expr {$ok ? "normal" : "disabled"}]
# always return 1
return 1
}
proc ::tk::dialog::file::chooseDir::DblClick {w} {
upvar ::tk::dialog::file::[winfo name $w] data
set selection [tk::IconList_CurSelection $data(icons)]
if {[llength $selection] != 0} {
set filenameFragment \
[tk::IconList_Get $data(icons) [lindex $selection 0]]
set file $data(selectPath)
if {[file isdirectory $file]} {
::tk::dialog::file::ListInvoke $w [list $filenameFragment]
return
}
}
}
# Gets called when user browses the IconList widget (dragging mouse, arrow
# keys, etc)
#
proc ::tk::dialog::file::chooseDir::ListBrowse {w text} {
upvar ::tk::dialog::file::[winfo name $w] data
if {$text eq ""} {
return
}
set file [::tk::dialog::file::JoinFile $data(selectPath) $text]
$data(ent) delete 0 end
$data(ent) insert 0 $file
}
# ::tk::dialog::file::chooseDir::Done --
#
# Gets called when user has input a valid filename. Pops up a
# dialog box to confirm selection when necessary. Sets the
# Priv(selectFilePath) variable, which will break the "vwait"
# loop in tk_chooseDirectory and return the selected filename to the
# script that calls tk_getOpenFile or tk_getSaveFile
#
proc ::tk::dialog::file::chooseDir::Done {w {selectFilePath ""}} {
upvar ::tk::dialog::file::[winfo name $w] data
variable ::tk::Priv
if {$selectFilePath eq ""} {
set selectFilePath $data(selectPath)
}
if {$data(-mustexist) && ![file isdirectory $selectFilePath]} {
return
}
set Priv(selectFilePath) $selectFilePath
}