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#
# Messagebox
# ----------------------------------------------------------------------
# Implements an information messages area widget with scrollbars.
# Message types can be user defined and configured. Their options
# include foreground, background, font, bell, and their display
# mode of on or off. This allows message types to defined as needed,
# removed when no longer so, and modified when necessary. An export
# method is provided for file I/O.
#
# The number of lines that can be displayed may be limited with
# the default being 1000. When this limit is reached, the oldest line
# is removed. There is also support for saving the contents to a
# file, using a file selection dialog.
# ----------------------------------------------------------------------
#
# History:
# 01/16/97 - Alfredo Jahn Renamed from InfoMsgBox to MessageBox
# Initial release...
# 01/20/97 - Alfredo Jahn Add a popup window so that 3rd mouse
# button can be used to configure/access the message area.
# New methods added: _post and _toggleDebug.
# 01/30/97 - Alfredo Jahn Add -filename option
# 05/11/97 - Mark Ulferts Added the ability to define and configure
# new types. Changed print method to be issue.
# 09/05/97 - John Tucker Added export method.
#
# ----------------------------------------------------------------------
# AUTHOR: Alfredo Jahn V EMAIL: ajahn@spd.dsccc.com
# Mark L. Ulferts mulferts@austin.dsccc.com
#
# @(#) $Id: messagebox.itk,v 1.6 2002/03/19 19:48:57 mgbacke Exp $
# ----------------------------------------------------------------------
# Copyright (c) 1997 DSC Technologies Corporation
# ======================================================================
# Permission to use, copy, modify, distribute and license this software
# and its documentation for any purpose, and without fee or written
# agreement with DSC, is hereby granted, provided that the above copyright
# notice appears in all copies and that both the copyright notice and
# warranty disclaimer below appear in supporting documentation, and that
# the names of DSC Technologies Corporation or DSC Communications
# Corporation not be used in advertising or publicity pertaining to the
# software without specific, written prior permission.
#
# DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
# INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
# AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL
# DSC BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION,
# ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
# SOFTWARE.
# ======================================================================
#
# Usual options.
#
itk::usual Messagebox {
keep -activebackground -activeforeground -background -borderwidth \
-cursor -highlightcolor -highlightthickness \
-jump -labelfont -textbackground -troughcolor
}
# ------------------------------------------------------------------
# MSGTYPE
# ------------------------------------------------------------------
itcl::class iwidgets::MsgType {
constructor {args} {eval configure $args}
public variable background \#d9d9d9
public variable bell 0
public variable font -*-Courier-Medium-R-Normal--*-120-*-*-*-*-*-*
public variable foreground Black
public variable show 1
}
# ------------------------------------------------------------------
# MESSAGEBOX
# ------------------------------------------------------------------
itcl::class iwidgets::Messagebox {
inherit itk::Widget
constructor {args} {}
destructor {}
itk_option define -filename fileName FileName ""
itk_option define -maxlines maxLines MaxLines 1000
itk_option define -savedir saveDir SaveDir "[pwd]"
public {
method clear {}
method export {filename}
method find {}
method issue {string {type DEFAULT} args}
method save {}
method type {op tag args}
}
protected {
variable _unique 0
variable _types {}
variable _interior {}
method _post {x y}
}
}
#
# Provide a lowercased access method for the Messagebox class.
#
proc ::iwidgets::messagebox {pathName args} {
uplevel ::iwidgets::Messagebox $pathName $args
}
#
# Use option database to override default resources of base classes.
#
option add *Messagebox.labelPos n widgetDefault
option add *Messagebox.cursor top_left_arrow widgetDefault
option add *Messagebox.height 0 widgetDefault
option add *Messagebox.width 0 widgetDefault
option add *Messagebox.visibleItems 80x24 widgetDefault
# ------------------------------------------------------------------
# CONSTRUCTOR
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::constructor {args} {
set _interior $itk_interior
#
# Create the text area.
#
itk_component add text {
iwidgets::Scrolledtext $itk_interior.text -width 1 -height 1 \
-state disabled -wrap none
} {
keep -borderwidth -cursor -exportselection -highlightcolor \
-highlightthickness -padx -pady -relief -setgrid -spacing1 \
-spacing2 -spacing3
keep -activerelief -elementborderwidth -jump -troughcolor
keep -hscrollmode -height -sbwidth -scrollmargin -textbackground \
-visibleitems -vscrollmode -width
keep -labelbitmap -labelfont -labelimage -labelmargin \
-labelpos -labeltext -labelvariable
}
grid $itk_component(text) -row 0 -column 0 -sticky nsew
grid rowconfigure $_interior 0 -weight 1
grid columnconfigure $_interior 0 -weight 1
#
# Setup right mouse button binding to post a user configurable
# popup menu and diable the binding for left mouse clicks.
#
bind [$itk_component(text) component text] <ButtonPress-1> "break"
bind [$itk_component(text) component text] \
<ButtonPress-3> [itcl::code $this _post %x %y]
#
# Create the small popup menu that can be configurable by users.
#
itk_component add itemMenu {
menu $itk_component(hull).itemmenu -tearoff 0
} {
keep -background -font -foreground \
-activebackground -activeforeground
ignore -tearoff
}
#
# Add clear and svae options to the popup menu.
#
$itk_component(itemMenu) add command -label "Find" \
-command [itcl::code $this find]
$itk_component(itemMenu) add command -label "Save" \
-command [itcl::code $this save]
$itk_component(itemMenu) add command -label "Clear" \
-command [itcl::code $this clear]
#
# Create a standard type to be used if no others are specified.
#
type add DEFAULT
eval itk_initialize $args
}
# ------------------------------------------------------------------
# DESTURCTOR
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::destructor {} {
foreach type $_types {
type remove $type
}
}
# ------------------------------------------------------------------
# METHODS
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# METHOD clear
#
# Clear the text area.
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::clear {} {
$itk_component(text) configure -state normal
$itk_component(text) delete 1.0 end
$itk_component(text) configure -state disabled
}
# ------------------------------------------------------------------
# PUBLIC METHOD: type <op> <tag> <args>
#
# The type method supports several subcommands. Types can be added
# removed and configured. All the subcommands use the MsgType class
# to implement the functionaility.
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::type {op tag args} {
switch $op {
add {
eval iwidgets::MsgType $this$tag $args
lappend _types $tag
$itk_component(text) tag configure $tag \
-font [$this$tag cget -font] \
-background [$this$tag cget -background] \
-foreground [$this$tag cget -foreground]
return $tag
}
remove {
if {[set index [lsearch $_types $tag]] != -1} {
itcl::delete object $this$tag
set _types [lreplace $_types $index $index]
return
} else {
error "bad message type: \"$tag\", does not exist"
}
}
configure {
if {[set index [lsearch $_types $tag]] != -1} {
set retVal [eval $this$tag configure $args]
$itk_component(text) tag configure $tag \
-font [$this$tag cget -font] \
-background [$this$tag cget -background] \
-foreground [$this$tag cget -foreground]
return $retVal
} else {
error "bad message type: \"$tag\", does not exist"
}
}
cget {
if {[set index [lsearch $_types $tag]] != -1} {
return [eval $this$tag cget $args]
} else {
error "bad message type: \"$tag\", does not exist"
}
}
default {
error "bad type operation: \"$op\", should be add,\
remove, configure or cget"
}
}
}
# ------------------------------------------------------------------
# PUBLIC METHOD: issue string ?type? args
#
# Print the string out to the Messagebox. Check the options of the
# message type to see if it should be displayed or if the bell
# should be wrong.
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::issue {string {type DEFAULT} args} {
if {[lsearch $_types $type] == -1} {
error "bad message type: \"$type\", use the type\
command to create a new types"
}
#
# If the type is currently configured to be displayed, then insert
# it in the text widget, add the tag to the line and move the
# vertical scroll bar to the bottom.
#
set tag $this$type
if {[$tag cget -show]} {
$itk_component(text) configure -state normal
#
# Find end of last message.
#
set prevend [$itk_component(text) index "end - 1 chars"]
$itk_component(text) insert end "$string\n" $args
$itk_component(text) tag add $type $prevend "end - 1 chars"
$itk_component(text) yview end
#
# Sound a beep if the message type is configured such.
#
if {[$tag cget -bell]} {
bell
}
#
# If we reached our max lines limit, then remove enough lines to
# get it back under.
#
set lineCount [lindex [split [$itk_component(text) index end] "."] 0]
if { $lineCount > $itk_option(-maxlines) } {
set numLines [expr {$lineCount - $itk_option(-maxlines) -1}]
$itk_component(text) delete 1.0 $numLines.0
}
$itk_component(text) configure -state disabled
}
}
# ------------------------------------------------------------------
# PUBLIC METHOD: save
#
# Save contents of messages area to a file using a fileselectionbox.
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::save {} {
set saveFile ""
set filter ""
set saveFile [tk_getSaveFile -title "Save Messages" \
-initialdir $itk_option(-savedir) \
-parent $itk_interior \
-initialfile $itk_option(-filename)]
if { $saveFile != "" } {
$itk_component(text) export $saveFile
}
}
# ------------------------------------------------------------------
# PUBLIC METHOD: find
#
# Search the contents of messages area for a specific string.
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::find {} {
if {! [info exists itk_component(findd)]} {
itk_component add findd {
iwidgets::Finddialog $itk_interior.findd \
-textwidget $itk_component(text)
}
}
$itk_component(findd) center $itk_component(text)
$itk_component(findd) activate
}
# ------------------------------------------------------------------
# PRIVATE METHOD: _post
#
# Used internally to post the popup menu at the coordinate (x,y)
# relative to the widget.
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::_post {x y} {
set rx [expr {[winfo rootx $itk_component(text)]+$x}]
set ry [expr {[winfo rooty $itk_component(text)]+$y}]
tk_popup $itk_component(itemMenu) $rx $ry
}
# ------------------------------------------------------------------
# METHOD export filename
#
# write text to a file (export filename)
# ------------------------------------------------------------------
itcl::body iwidgets::Messagebox::export {filename} {
$itk_component(text) export $filename
}