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# Global preference class implementation for GDBtk.
# Copyright 1997, 1998, 1999 Cygnus Solutions
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License (GPL) as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.


# ----------------------------------------------------------------------
# Implements Global preferences dialog
#
# ----------------------------------------------------------------------

# ------------------------------------------------------------------
#  PROC:  _init - set up the tracing labels info
# ------------------------------------------------------------------
body GlobalPref::_init {} {
  if {$inited} {
    return
  }
  
  set inited 1
  
  array set tracing_labels {
    0 "Tracing features disabled"
    1 "Tracing features enabled"
    max_len 0
  }
  
  foreach elem [array names tracing_labels] {
    set len [string length $tracing_labels($elem)]
    set tracing_labels(max_len) \
      [expr $len > $tracing_labels(max_len) ? $len : $tracing_labels(max_len) ]
  }
}

# ------------------------------------------------------------------
#  METHOD:  constructor - create the Global Preferences object
# ------------------------------------------------------------------
body GlobalPref::constructor {args} {    
  window_name "Global Preferences"
  _init
  build_win
  eval itk_initialize $args
}

# ------------------------------------------------------------------
#  METHOD:  destructor - destroy the Global Preferences object
# ------------------------------------------------------------------
body GlobalPref::destructor {} {
  foreach thunk $Fonts {
    font delete test-$thunk-font
  }
}

# ------------------------------------------------------------------
#  METHOD:  build_win - build the dialog
# ------------------------------------------------------------------
body GlobalPref::build_win {} {
  global tcl_platform GDBTK_LIBRARY
  debug
  frame $itk_interior.f
  frame $itk_interior.x
  set frame $itk_interior.f
  
  # Icons
  frame $frame.icons
  label $frame.icons.lab -text "Icons "
  combobox::combobox $frame.icons.cb -editable 0 -maxheight 10\
    -command [code $this change_icons]
  
  # get list of icon directories
  set curdir [pwd]
  set icondirlist ""
  cd $GDBTK_LIBRARY
  foreach foo [glob -- *] {
    if {[file isdirectory $foo] && [file exists [file join $foo "icons.txt"]]} {
      lappend icondirlist $foo
    }
  }

  set width 14
  # load combobox
  set imagedir [pref get gdb/ImageDir]
  foreach dir $icondirlist {
    if {![string compare $dir $imagedir]} {
      set cdir 1
    } else {
      set cdir 0
    }
    set foo [file join $dir "icons.txt"]
    if {[catch {::open $foo r} fid]} {
      # failed
      dbug E "couldn't open $foo:$fid"
      if {$cdir} {$frame.icons.cb entryset "unknown icons"}
      $frame.icons.cb list insert end "unknown icons"
    } else {
      if {[gets $fid txt] >= 0} {
        if {$cdir} {$frame.icons.cb entryset $txt}
        if {[string length $txt] > $width} {set width [string length $txt]}
        $frame.icons.cb list insert end $txt
      } else {
        if {$cdir} {$frame.icons.cb entryset "unknown icons"}
        $frame.icons.cb list insert end "unknown icons"
      }
      close $fid
    }
  }
  $frame.icons.cb configure -width $width
  cd $curdir

  # searching for fixed font families take a long time
  # therefore, we cache the font names.  The font cache
  # can be saved in the init file. A way should be provided
  # to rescan the font list, without deleting the entry from the
  # init file.
  set font_cache [pref get gdb/font_cache]
  if {$font_cache == ""} {
    if {$tcl_platform(platform) == "unix"} {
      toplevel .c
      wm title .c "Scanning for fonts"
      message .c.m -width 3i -text "Scanning system for fonts\n\nPlease wait..." \
        -relief flat -padx 30 -pady 30 \
        -bg [pref get gdb/global_prefs/message_bg] \
        -fg [pref get gdb/global_prefs/message_fg]
      ::update
      pack .c.m
      focus .c
      ::raise .c
      ::update
    }
    set fam [font families]
    foreach fn $fam {
      if {[font metrics [list $fn] -fixed] == 1} {
        lappend font_cache $fn
      }
    }
    pref set gdb/font_cache $font_cache
    if {$tcl_platform(platform) == "unix"} { destroy .c }
  }
  
  Labelledframe $frame.d -text "Fonts"
  set f [$frame.d get_frame]

  make_font_item $f fixed "Fixed Font:" $font_cache

  if {$tcl_platform(platform) != "windows"} {
    # Cannot change the windows menu font ourselves
    make_font_item $f menu "Menu Font:" [font families]
  }

  make_font_item $f default "Default Font:" [font families]
  make_font_item $f status  "Status Bar Font:" [font families]

  # This is the tracing preference
  set tracing_cb [pref get gdb/mode]
  if { ![info exists tracing_labels($tracing_cb)]} {
    debug "Got unknown mode value: $tracing_cb"
    set tracing_labels($tracing_cb) "Unknown gdb mode..."
  }

  frame $frame.tracing
  checkbutton $frame.tracing.cb -variable [scope tracing_cb] \
    -text $tracing_labels($tracing_cb) \
    -command [code $this toggle_tracing $frame.tracing.cb] \
    -width $tracing_labels(max_len) -anchor w
    pack $frame.tracing.cb -pady 10 -side left -fill none 

  # help browser preferences
  if {$tcl_platform(platform) == "windows"} {
    set help_text "Use Internet Browser to View Help Files"
  } else {
    set help_text "Use Netscape to View Help Files"
  }
  frame $frame.browser
  checkbutton $frame.browser.cb  \
    -text $help_text -variable [pref varname gdb/help/browser]
  pack $frame.browser.cb -pady 10 -side left -fill none 

  # use_icons
  if {$tcl_platform(platform) == "unix"} {
    frame $frame.use_icons
    checkbutton $frame.use_icons.cb  \
      -text "Use builtin image as icon." -variable [pref varname gdb/use_icons]
    pack $frame.use_icons.cb -pady 10 -side left -fill none 
  }

  # console wrap
  frame $frame.consolewrap
  checkbutton $frame.consolewrap.cw -text "wrap text in console window" \
    -variable [pref varname gdb/console/wrap]
  pack $frame.consolewrap.cw -pady 10 -side left -fill none

  pack $frame.icons.lab $frame.icons.cb -side left
  pack $frame.icons -side top -padx 10 -pady 10
  pack $frame.tracing -side top -fill x -expand 0 -side bottom
  pack $frame.browser -side top -fill x -expand 0 -side bottom
  if {$tcl_platform(platform) == "unix"} {
    pack $frame.use_icons -side top -fill x -expand 0 -side bottom
  }
  pack $frame.consolewrap -side top -fill x -expand 0 -side bottom
  pack $frame.d -side top -fill both -expand yes

  # make buttons
  button $itk_interior.x.ok -text OK -underline 0 -width 7 -command [code $this ok]
  button $itk_interior.x.apply -text Apply -width 7 -underline 0 -command [code $this apply]
  button $itk_interior.x.cancel -text Cancel -width 7 -underline 0 -command [code $this cancel]
  pack $itk_interior.x.ok $itk_interior.x.apply $itk_interior.x.cancel -side left
  standard_button_box $itk_interior.x
  pack $itk_interior.x -fill x -padx 5 -pady 5 -side bottom


  pack $itk_interior.f -fill both -expand yes -padx 10 -pady 5

  bind $itk_interior.x.ok <Return> \
    "$itk_interior.x.ok flash; $itk_interior.x.ok invoke"
  focus $itk_interior.x.ok

  # We don't want the window flashing around as we change the fonts...

  ::update idletasks

  resize_font_item_height
  pack propagate $itk_interior.f 0

}
# ------------------------------------------------------------------
#  PRIVATE METHOD:  make_font_item
# ------------------------------------------------------------------
body GlobalPref::make_font_item {f name label font_list} {
  
  # create ComboBox with font name
  lappend Fonts $name
  
  set Original($name,family) [font actual global/$name -family]
  set Original($name,size) [font actual global/$name -size]
  font create test-$name-font -family $Original($name,family) \
    -size $Original($name,size)
  label $f.${name}x -text $label
  
  combobox::combobox $f.${name}n -editable 0 -value $Original($name,family) \
    -command [code $this wfont_changed family $name]
  
  foreach a $font_list {
    $f.${name}n list insert end $a
  }
  
  tixControl $f.${name}s -label Size: -integer true -max 18 -min 6 \
    -value $Original(${name},size) -command [code $this font_changed size $name]
  [$f.${name}s subwidget entry] configure -width 2
  label $f.${name}l -text ABCDEFabcdef0123456789 -font test-$name-font
  
  grid $f.${name}x $f.${name}n $f.${name}s $f.${name}l -sticky we -padx 5 -pady 5
  grid columnconfigure $f 3 -weight 1
  
}

# ------------------------------------------------------------------
#  PRIVATE METHOD:  resize_font_item_height
# ------------------------------------------------------------------
body GlobalPref::resize_font_item_height {} {
  foreach font $Fonts {
    set master [$itk_interior.f.d get_frame]
    set row [gridCGet $master.${font}l -row]
    grid rowconfigure $master $row -minsize [lindex [grid bbox $master 0 $row 3 $row ] 3]
  } 
}

# ------------------------------------------------------------------
#  PRIVATE METHOD:  change_icons
# ------------------------------------------------------------------
body GlobalPref::change_icons {w args} {
  global gdb_ImageDir GDBTK_LIBRARY
  set index [$w list curselection]
  if {$index != ""} {
    set dir [lindex $icondirlist $index]
    pref set gdb/ImageDir $dir
    set gdb_ImageDir [file join $GDBTK_LIBRARY $dir]
    ManagedWin::restart
  }
}

# ------------------------------------------------------------------
#  PRIVATE METHOD:  wfont_changed - callback from font comboboxes
#  PRIVATE METHOD:  font_changed - callback from font tixControls
# ------------------------------------------------------------------
body GlobalPref::wfont_changed {attribute font w val} {
  font_changed $attribute $font $val
}

body GlobalPref::font_changed {attribute font val} {
  # val will be a size or a font name

  switch $attribute {
    size {
      set oldval [font configure test-$font-font -size]
      font configure test-$font-font -size $val
    }

    family {
      set oldval [font configure test-$font-font -family]
      font configure test-$font-font -family $val
    }
    
    default { debug "GlobalPref::font_changed -- invalid change" }
  }
}

# ------------------------------------------------------------------
#  METHOD:  toggle_tracing_mode - toggles the tracing mode on and off
# ------------------------------------------------------------------
body GlobalPref::toggle_tracing_mode {} {
  pref set gdb/mode $tracing_cb
  # Reset the button-1 behavior if you are going out of trace mode.
  if {!$tracing_cb} {
    pref set gdb/B1_behavior 1
  }    
}

body GlobalPref::toggle_tracing {win} {
  debug foo
  $win configure -text $tracing_labels($tracing_cb)
}

# ------------------------------------------------------------------
#  METHOD:  ok - called to accept settings and close dialog
# ------------------------------------------------------------------
body GlobalPref::ok {} {
  apply 1
}

# ------------------------------------------------------------------
#  METHOD:  apply - apply current settings to the screen
# ------------------------------------------------------------------
body GlobalPref::apply {{deleteMe 0}} {
  set commands {}

  # If you are not destroying the window, then make sure to
  # propagate the geometry info from the font frame, so that changing 
  # the fonts IN the window don't cause some of the buttons to 
  # get obscured...

  if {!$deleteMe} {
    pack propagate $itk_interior.f 1
  }

  foreach thunk $Fonts {
    set font [font configure test-$thunk-font]
    if {[pref get global/font/$thunk] != $font} {
      lappend commands [list pref set global/font/$thunk $font]
    }
  }

  if {[pref get gdb/mode] != $tracing_cb} {
    lappend commands toggle_tracing_mode
  }

  if {[llength $commands] > 0} {
    foreach command $commands {
      eval $command
    }
    if {$deleteMe} {
      unpost
    }
    ManagedWin::restart
    return
  }
  if {$deleteMe} {
    unpost
  } else {
    after idle " 
      update idletasks
      [code $this resize_font_item_height]
      pack propagate $itk_interior.f 0
    "
  }    
}

# ------------------------------------------------------------------
#  METHOD:  cancel - forget current settings -- reset to original
#                    state and close preferences
# ------------------------------------------------------------------
body GlobalPref::cancel {} {  
  # Reset fonts if different
  set commands {}
  foreach thunk $Fonts {
    set family [font configure global/$thunk -family]
    set size   [font configure global/$thunk -size]
    if {$Original($thunk,family) != $family || $Original($thunk,size) != $size} {
      lappend commands [list pref set global/font/$thunk \
        [list -family $Original($thunk,family) -size $Original($thunk,size)]]
    }
  }

  if {[llength $commands] > 0} {
    foreach command $commands {
      eval $command
    }
  }
  if {[llength $commands] > 0} {
    ManagedWin::restart
  }
  unpost
}