Subversion Repositories or1k

#!/bin/sh

#\

exec itkwish $0

# ======================================================================

# Simple text editor built with [incr Widgets]

# ----------------------------------------------------------------------

#   AUTHOR:  Michael J. McLennan

#    CLASS:  Object-Oriented Programming with [incr Tcl]

# ======================================================================

package require Iwidgets 2.1

option add *edit.width 5i startupFile

option add *edit.height 4i startupFile

option add *Fileselectiondialog.width 4i startupFile

option add *Fileselectiondialog.height 5i startupFile

# ----------------------------------------------------------------------

set FileWindows 0

# ----------------------------------------------------------------------

#  Dialog boxes

# ----------------------------------------------------------------------

messagedialog .notice -title "itkedit: Notice" \

    -bitmap info -buttonboxpos e -modality application

.notice hide OK

.notice hide Help

.notice buttonconfigure Cancel -text "Dismiss"

messagedialog .confirm -title "itkedit: Confirm" \

    -bitmap questhead -modality application

.confirm hide Help

.confirm buttonconfigure OK -text "Yes"

.confirm buttonconfigure Cancel -text "No"

fileselectiondialog .files -title "itkedit: Files" \

    -childsitepos s -modality application

.files hide Help

set PaneMenu "[.files childsite].panes"

optionmenu $PaneMenu -labeltext "Edit Window:"

pack $PaneMenu -pady 6

# ----------------------------------------------------------------------

# USAGE:  file_load

#

# Initiates the process of loading a new text file for editing.

# Pops up a Fileselectiondialog, allowing the user to select a

# file for editing.  If the user pushes the "load" button, the

# file is loaded.

# ----------------------------------------------------------------------

proc file_load {} {

    global FileName PaneMenu

    .files buttonconfigure OK -text "Load"

    if {[.files activate]} {

        set fname [.files get]

        set cmd {

            set fid [open $fname r]

            set text [read $fid]

            close $fid

        }

        if {[catch $cmd err] != 0} {

            .notice configure -bitmap error \

                -text "Cannot load file \"$fname\":\n$err"

            .notice activate

            return

        }

        set pane [$PaneMenu get]

        set win [.edit childsite $pane]

        clear_text $win

        $win.text insert end $text

        $win.text configure -labeltext "file: $fname"

        set FileName($win) $fname

    }

}

# ----------------------------------------------------------------------

# USAGE:  file_save_as

#

# Initiates the process of saving the current text into a particular

# file.  Pops up a Fileselectiondialog, allowing the user to select

# a file for saving.  If the user pushes the "save" button, the

# file is saved.

# ----------------------------------------------------------------------

proc file_save_as {} {

    global FileName PaneMenu

    .files buttonconfigure OK -text "Save"

    if {[.files activate]} {

        set pane [$PaneMenu get]

        set win [.edit childsite $pane]

        set FileName($win) [.files get]

        file_save $win

    }

}

# ----------------------------------------------------------------------

# USAGE:  file_save 

#

# Saves the context of  into its associated file.  Does the

# dirty work to finish the file_save_as operation.

# ----------------------------------------------------------------------

proc file_save {win} {

    global FileName FileChanged

    set cmd {

        set fid [open $FileName($win) w]

        puts $fid [$win.text get 1.0 end]

        close $fid

        set FileChanged($win) 0

        $win.text configure -labeltext "file: $FileName($win)"

    }

    if {[catch $cmd err] != 0} {

        .notice configure -bitmap error \

            -text "Cannot save file \"$FileName($win)\":\n$err"

        .notice activate

    }

}

# ----------------------------------------------------------------------

# USAGE:  clear_text ??

#

# Clears the text area associated with , making sure to save

# any pending changes.  If no  is specified, then all text

# areas are cleared.

# ----------------------------------------------------------------------

proc clear_text {{areas ""}} {

    global FileName FileChanged FileWindows

    if {$areas == ""} {

        for {set i 0} {$i < $FileWindows} {incr i} {

            set pane "area #[expr $i+1]"

            lappend areas [.edit childsite $pane]

        }

    }

    foreach win $areas {

        if {$FileChanged($win)} {

            set fname [file tail $FileName($win)]

            .confirm configure -text "File \"$fname\" has changed.\nSave changes?"

            if {[.confirm activate]} {

                file_save $win

            }

        }

        $win.text delete 1.0 end

        set FileChanged($win) 0

    }

}

# ----------------------------------------------------------------------

# USAGE:  split_view

#

# Adds another editing pane to the current editor.

# ----------------------------------------------------------------------

proc split_view {} {

    global FileName FileChanged FileWindows PaneMenu

    set pane "area #[incr FileWindows]"

    .edit add $pane -minimum 100

    $PaneMenu insert end $pane

    set win [.edit childsite $pane]

    set FileName($win) untitled.txt

    set FileChanged($win) 0

    scrolledtext $win.text -wrap none -labeltext "file: $FileName($win)" \

        -hscrollmode none -vscrollmode dynamic -visibleitems 1x1

    pack $win.text -expand yes -fill both

    bind [$win.text component text]  "

        set FileChanged($win) 1

    "

}

frame .mbar -borderwidth 2 -relief raised

pack .mbar -side top -fill x

# ----------------------------------------------------------------------

#  FILE menu

# ----------------------------------------------------------------------

menubutton .mbar.file -text "File" -underline 0 -menu .mbar.file.menu

pack .mbar.file -side left -padx 4

menu .mbar.file.menu

.mbar.file.menu add command -label "Load..." \

    -accelerator "  ^L" -underline 0 -command file_load

bind .  { .mbar.file.menu invoke "Load..." }

.mbar.file.menu add command -label "Save As..." \

    -accelerator "  ^S" -underline 0 -command file_save_as

bind .  { .mbar.file.menu invoke "Save As..." }

.mbar.file.menu add separator

.mbar.file.menu add command -label "Quit" \

    -accelerator "  ^Q" -underline 0 -command {clear_text; exit}

bind .  { .mbar.file.menu invoke Quit }

# ----------------------------------------------------------------------

#  VIEW menu

# ----------------------------------------------------------------------

menubutton .mbar.view -text "View" -underline 0 -menu .mbar.view.menu

pack .mbar.view -side left -padx 4

menu .mbar.view.menu

.mbar.view.menu add command -label "Split" \

    -underline 0 -command split_view

# ----------------------------------------------------------------------

#  Editor

# ----------------------------------------------------------------------

panedwindow .edit -orient horizontal

pack .edit -expand yes -fill both

split_view

wm title . "itkedit"

wm protocol . WM_DELETE_WINDOW { .mbar.file.menu invoke Quit }

after idle {

    update idletasks

    wm minsize . [winfo reqwidth .] [winfo reqheight .]

}