#!/usr/bin/env ruby

# widget --
# This script demonstrates the various widgets provided by Tk,
# along with many of the features of the Tk toolkit.  This file
# only contains code to generate the main window for the
# application, which invokes individual demonstrations.  The
# code for the actual demonstrations is contained in separate
# ".rb" files is this directory, which are sourced by this script
# as needed.

require 'tk'

unless /^8\.[1-9]/ =~ Tk::TCL_VERSION && !Tk::JAPANIZED_TK
  require 'tkencoding'
end

require 'tkafter'

### $DEBUG=1 ##########

#----------------------------------------------------------------
# The code below create the main window, consisting of a menu bar
# and a text widget that explains how to use the program, plus lists
# all of the demos as hypertext items.
#----------------------------------------------------------------

# widget demo directory
$demo_dir = File.dirname($0)

# root 
$root = TkRoot.new{title "Ruby/Tk Widget Demonstration"}

# tk 
$tk_version = Tk::TK_VERSION

# tcl_platform 
$tk_platform = TkVarAccess.new('tcl_platform')

#
$font = TkFont.new('-*-Helvetica-Medium-R-Normal--*-140-*-*-*-*-*-*', nil)

# 
TkMenubar.new($root, 
	      [[['File', 0], 
		  ['About ... ', proc{aboutBox}, 0, '<F1>'],
		  '---', 
		  ['Quit', proc{exit}, 0, 'Meta-Q']
		]]).pack('side'=>'top', 'fill'=>'x')
$root.bind('F1', proc{aboutBox})

=begin
TkFrame.new($root){|frame|
  TkMenubutton.new(frame){|button|
    m = TkMenu.new(button) {
      add 'command', 'label'=>'Quit', 'command'=>proc{exit}, 'underline'=>0
    }
    menu m
    text 'File'
    underline 0
  }.pack('side'=>'left')
}.pack('side'=>'top', 'fill'=>'x')
=end

# 
if $tk_version =~ /^4\.[01]/
  scr = TkScrollbar.new($root, 'orient'=>'vertical')
  txt = TkText.new($root) {
    wrap 'word'
    width 60
    height 30
    font $font
    setgrid 'yes'
    yscrollcommand proc{|first,last| scr.set first,last}
  }
  scr.command(proc{|*args| txt.yview(*args)})
  scr.pack('side'=>'right', 'fill'=>'y')
  txt.pack('expand'=>'yes', 'fill'=>'both')
else
  textFrame = TkFrame.new($root)
  scr = TkScrollbar.new($root, 'orient'=>'vertical', 
			'highlightthickness'=>0, 'takefocus'=>1) {
    pack('in'=>textFrame, 'side'=>'right', 'fill'=>'y', 'padx'=>1)
  }
  txt = TkText.new($root) {
    wrap 'word'
    width 60
    height 30
    font $font
    setgrid 'yes'
    highlightthickness 0
    padx 4
    pady 2
    takefocus 0
    yscrollcommand proc{|first,last| scr.set first,last}
  }
  scr.command(proc{|*args| txt.yview(*args)})
#  txt.pack('in'=>textFrame, 'expand'=>'yes', 'fill'=>'both', 'padx'=>1)
  txt.pack('in'=>textFrame, 'expand'=>'yes', 'fill'=>'both')
#  textFrame.pack('expand'=>'yes', 'fill'=>'both', 'padx'=>1, 'pady'=>2)
  textFrame.pack('expand'=>'yes', 'fill'=>'both')

  statusBar = TkFrame.new($root) {|f|
    $statusBarLabel = \
    TkLabel.new(f, 'text'=>"   ", 'relief'=>'sunken', 'bd'=>1, 'anchor'=>'w', 
		'font'=>'-*-Helvetica-Medium-R-Normal--*-120-*-*-*-*-*-*') \
	.pack('side'=>'left', 'padx'=>2, 'expand'=>'yes', 'fill'=>'both')
    TkLabel.new(f, 'width'=>8, 'relief'=>'sunken', 'bd'=>1, 'anchor'=>'w', 
		'font'=>'-*-Helvetica-Medium-R-Normal--*-120-*-*-*-*-*-*') \
	.pack('side'=>'left', 'padx'=>2)
  }.pack('side'=>'bottom', 'fill'=>'x', 'pady'=>2)
end

# Create a bunch of tags to use in the text widget, such as those for
# section titles and demo descriptions.  Also define the bindings for
# tags.
  
tag_title = TkTextTag.new(txt, 'font'=>'-*-Helvetica-Bold-R-Normal--*-180-*-*-*-*-*-*')

# We put some "space" characters to the left and right of each demo description
# so that the descriptions are highlighted only when the mouse cursor
# is right over them (but not when the cursor is to their left or right)

tag_demospace = TkTextTag.new(txt, 'lmargin1'=>'1c', 'lmargin2'=>'1c')

if TkWinfo.depth($root) == '1'
  tag_demo = TkTextTag.new(txt, 'lmargin1'=>'1c', 'lmargin2'=>'1c', 
			   'underline'=>1)
  $tag_visited = TkTextTag.new(txt, 'lmargin1'=>'1c', 'lmargin2'=>'1c', 
			      'underline'=>1)
  tag_hot = TkTextTag.new(txt, 'background'=>'black', 'foreground'=>'white')
else
  tag_demo = TkTextTag.new(txt, 'lmargin1'=>'1c', 'lmargin2'=>'1c', 
			   'foreground'=>'blue', 'underline'=>1)
  $tag_visited = TkTextTag.new(txt, 'lmargin1'=>'1c', 'lmargin2'=>'1c', 
			      'foreground'=>'#303080', 'underline'=>1)
#  tag_hot = TkTextTag.new(txt, 'relief'=>'raised', 'borderwidth'=>1, 
#			  'background'=>'SeaGreen3')
  tag_hot = TkTextTag.new(txt, 'borderwidth'=>1, 'foreground'=>'red')
end

#tag_demo.bind('Button-1', proc{invoke txt, txt.index('current')})
tag_demo.bind('ButtonRelease-1', 
	      proc{|x,y|invoke txt, txt.index("@#{x},#{y}")}, '%x %y')

lastLine = TkVariable.new("")
newLine  = TkVariable.new("")
tag_demo.bind('Enter', proc{|x,y|
		lastLine.value = txt.index("@#{x},#{y} linestart")
		tag_hot.add(lastLine.value, "#{lastLine.value} lineend")
		showStatus txt, txt.index("@#{x},#{y}")
	      },
	      '%x %y')
tag_demo.bind('Leave', 
	      proc{
		tag_hot.remove('1.0','end')
		txt.configure('cursor','xterm')
		$statusBarLabel.configure('text'=>"")
	      })
tag_demo.bind('Motion', proc{|x, y|
		newLine.value = txt.index("@#{x},#{y} linestart")
		if newLine.value != lastLine.value
		  tag_hot.remove('1.0','end')
		  lastLine.value = newLine.value
		  if ( txt.tag_names("@#{x},#{y}").find{|t| 
			t.kind_of?(String) && t =~ /^demo-/
		      } )
		    tag_hot.add(lastLine.value, 
				"#{lastLine.value} lineend -1 chars")
		  end
		end
		showStatus txt, txt.index("@#{x},#{y}")
	      },
	      '%x %y')

# Create the text for the text widget.

txt.insert('end', "Ruby/Tk Widget Demonstrations\n\n", tag_title)
txt.insert('end', <<EOT)
This application provides a front end for several short scripts that \
demonstrate what you can do with Tk widgets.  Each of the numbered \
lines below describes a demonstration;  you can click on it to invoke \
the demonstration.  Once the demonstration window appears, you can \
click the "See Code" button to see the Ruby/Tk code that created the \
demonstration.  If you wish, you can edit the code and click the \
"Rerun Demo" button in the code window to reinvoke the demonstration \
with the modified code.

EOT

txt.insert('end', "Labels, buttons, checkbuttons, and radiobuttons.\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. Labels (text and bitmaps).\n", tag_demo, "demo-label")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. Buttons.\n", tag_demo, "demo-button")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "3. Checkbuttons (select any of a group).\n", tag_demo, "demo-check")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "4. Radiobuttons (select one of a group).\n", tag_demo, "demo-radio")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "5. A 15-puzzle game made out of buttons.\n", tag_demo, "demo-puzzle")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "6. Iconic buttons that use bitmaps.\n", tag_demo, "demo-icon")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "7. Two labels displaying images.\n", tag_demo, "demo-image1")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "8. A simple user interface for viewing images.\n", tag_demo, "demo-image2")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Listboxes\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. 50 states.\n", tag_demo, "demo-states")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. Colors: change the color scheme for the application.\n", "#{tag_demo.id} demo-colors")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "3. A collection of famous sayings.\n", tag_demo, "demo-sayings")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Entries\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. Without scrollbars.\n", tag_demo, "demo-entry1")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. With scrollbars.\n", tag_demo, "demo-entry2")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "3. Simple Rolodex-like form.\n", tag_demo, "demo-form")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Text\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. Basic editable text.\n", tag_demo, "demo-text")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. Text display styles.\n", tag_demo, "demo-style")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "3. Hypertext (tag bindings).\n", tag_demo, "demo-bind")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "4. A text widget with embedded windows.\n", tag_demo, "demo-twind")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "5. A search tool built with a text widget.\n", tag_demo, "demo-search")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Canvases\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. The canvas item types.\n", tag_demo, "demo-items")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. A simple 2-D plot.\n", tag_demo, "demo-plot")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "3. Text items in canvases.\n", tag_demo, "demo-ctext")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "4. An editor for arrowheads on canvas lines.\n", tag_demo, "demo-arrow")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "5. A ruler with adjustable tab stops.\n", tag_demo, "demo-ruler")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "6. A building floor plan.\n", tag_demo, "demo-floor")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "7. A simple scrollable canvas.\n", tag_demo, "demo-cscroll")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Scales\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. Vertical scale.\n", tag_demo.id, "demo-vscale")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. Horizontal scale.\n", tag_demo.id, "demo-hscale")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Menus\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. Menus and cascades.\n", tag_demo, "demo-menu")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. Menubuttons\n", tag_demo, "demo-menubu")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Common Dialogs\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. Message boxes.\n", tag_demo, "demo-msgbox")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. File selection dialog.\n", tag_demo, "demo-filebox")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "3. Color picker.\n", tag_demo, "demo-clrpick")
txt.insert('end', " \n ", tag_demospace)

txt.insert('end', "\n")
txt.insert('end', "Miscellaneous\n", tag_title)
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "1. The built-in bitmaps.\n", tag_demo, "demo-bitmap")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "2. A dialog box with a local grab.\n", tag_demo, "demo-dialog1")
txt.insert('end', " \n ", tag_demospace)
txt.insert('end', "3. A dialog box with a global grab.\n", tag_demo, "demo-dialog2")
txt.insert('end', " \n ", tag_demospace)

txt.state('disabled')
scr.focus

# positionWindow --
# This procedure is invoked by most of the demos to position a
# new demo window.
#
# Arguments:
# w -		The name of the window to position.

def positionWindow(w)
  w.geometry('+300+300')
end

# showVars --
# Displays the values of one or more variables in a window, and
# updates the display whenever any of the variables changes.
#
# Arguments:
# w -		Name of new window to create for display.
# args -	Any number of names of variables.

$showVarsWin = {}
def showVars (parent, *args)
  if $showVarsWin[parent.path]
    begin
      $showVarsWin[parent.path].destroy 
    rescue
    end
  end
  w = TkToplevel.new(parent) {|w|
    title "Variable values"
    TkLabel.new(w) {
      text "Variable values:"
      width 20
      anchor 'center'
      font '-Adobe-helvetica-medium-r-normal--*-180-*-*-*-*-*-*'
    }.pack('side'=>'top', 'fill'=>'x')
    len = 1
    args.each{|vnam,vbody|
      len = vnam.to_s.length if vnam.to_s.length > len
    }
    args.each{|vnam,vbody|
      TkFrame.new(w){|f|
	#TkLabel.new(f, 'text'=>"#{vnam}: ").pack('side'=>'left')
	TkLabel.new(f, 'text'=>"#{vnam}: ",'width'=>len+2).pack('side'=>'left')
	TkLabel.new(f, 'textvariable'=>vbody, 'anchor'=>'w')\
	           .pack('side'=>'left', 'expand'=>'yes', 'fill'=>'x')
      }.pack('side'=>'top', 'anchor'=>'w', 'fill'=>'x')
    }
    TkButton.new(w) {
      text "OK"
      command proc{w.destroy}
    }.pack('side'=>'bottom', 'pady'=>2)
  }
  $showVarsWin[parent.path] = w
end

# invoke --
# This procedure is called when the user clicks on a demo description.
# It is responsible for invoking the demonstration.
#
# Arguments:
# index -	The index of the character that the user clicked on.

def invoke (txt, index)
  tag = txt.tag_names(index).find{|t| t.kind_of?(String) && t =~ /^demo-/}
  return unless tag
  cursor = txt.cget('cursor')
  txt.cursor('watch')
  Tk.update
#  eval `cat #{tag[5..-1]}.rb`
  eval `cat #{[$demo_dir, tag[5..-1]].join(File::Separator)}.rb`
  Tk.update
#  txt.cursor('xterm')
  txt.cursor(cursor)

  $tag_visited.add("#{index} linestart +1 chars", "#{index} lineend +1 chars")
end

# showStatus --
#
#	Show the name of the demo program in the status bar. This procedure
#	is called when the user moves the cursor over a demo description.
#

def showStatus (txt, index)
  tag = txt.tag_names(index).find{|t| t.kind_of?(String) && t =~ /^demo-/}
  cursor = txt.cget('cursor')
  unless tag
    $statusBarLabel.configure('text', " ")
    newcursor = 'xterm'
  else
    demoname = tag[5..-1]
    $statusBarLabel.configure('text', 
			     "Run the \"#{demoname}\" sample program")
    newcursor = 'hand2'
  end
  txt.configure('cursor'=>newcursor) if cursor != newcursor
end

# showCode --
# This procedure creates a toplevel window that displays the code for
# a demonstration and allows it to be edited and reinvoked.
#
# Arguments:
# w -		The name of the demonstration's window, which can be
#		used to derive the name of the file containing its code.

def showCode (demo)
  file = "#{demo}.rb"
  $code_window = nil unless defined? $code_window
  if $code_window == nil || TkWinfo.exist?($code_window) == '0'
    $code_window = TkToplevel.new(nil)
    f = TkFrame.new($code_window)
    TkButton.new(f) {
      text "Dismiss"
      command proc{
	$code_window.destroy
	$code_window = nil
      }
    }.pack('side'=>'left', 'expand'=>'yes', 'pady'=>2)
    TkButton.new(f) {
      text "Rerun Demo"
      command proc{eval($code_text.get('1.0','end'))}
    }.pack('side'=>'left', 'expand'=>'yes', 'pady'=>2)
#    f.pack('side'=>'bottom', 'expand'=>'yes', 'fill'=>'x')
    f.pack('side'=>'bottom', 'fill'=>'x')

    if $tk_version =~ /^4\.[01]/
      s = TkScrollbar.new($code_window, 'orient'=>'vertical')
      $code_text = TkText.new($code_window) {
	height 40
	setgrid 'yes'
	yscrollcommand proc{|first,last| s.set first,last}
      }
      s.command(proc{|*args| $code_text.yview(*args)})
      s.pack('side'=>'right', 'fill'=>'y')
      $code_text.pack('side'=>'left', 'expand'=>'yes', 'fill'=>'both')
    else
      TkFrame.new($code_window) {|f|
	pack('expand'=>'yes', 'fill'=>'both', 'padx'=>1, 'pady'=>1)

	hs = TkScrollbar.new($code_window, 'highlightthickness'=>0, 
			     'orient'=>'horizontal')
	vs = TkScrollbar.new($code_window, 'highlightthickness'=>0, 
			     'orient'=>'vertical')
	$code_text = TkText.new($code_window) {|t|
	  height 40
	  wrap 'word'
	  xscrollcommand proc{|first,last| hs.set first,last}
	  yscrollcommand proc{|first,last| vs.set first,last}
	  setgrid 'yes'
	  highlightthickness 0
	  pady 2
	  padx 3
	  hs.command(proc{|*args| $code_text.xview(*args)})
	  vs.command(proc{|*args| $code_text.yview(*args)})
	}

	$code_text.grid('in'=>f, 'padx'=>1, 'pady'=>1, 'row'=>0, 'column'=>0, 
			'rowspan'=>1, 'columnspan'=>1, 'sticky'=>'news')
	vs.grid('in'=>f, 'padx'=>1, 'pady'=>1, 'row'=>0, 'column'=>1, 
		'rowspan'=>1, 'columnspan'=>1, 'sticky'=>'news')
#	xs.grid('in'=>f, 'padx'=>1, 'pady'=>1, 'row'=>1, 'column'=>0, 
#		'rowspan'=>1, 'columnspan'=>1, 'sticky'=>'news')

# JKC 2001-07-26: segfaults under 1.7.1 (2001-06-19) [i686-linux]
	TkGrid.rowconfigure(f, 0, 'weight'=>1, 'minsize'=>0)
	TkGrid.columnconfigure(f, 0, 'weight'=>1, 'minsize'=>0)
      }
    end
  else
    $code_window.deiconify
    $code_window.raise
  end
  $code_window.title("Demo code: #{file}")
  $code_window.iconname(file)
#  fid = open(file, 'r')
  fid = open([$demo_dir, file].join(File::Separator), 'r')
  $code_text.delete('1.0', 'end')
  #$code_text.insert('1.0', `cat #{file}`)
  $code_text.insert('1.0', fid.read)
  #$code_mark = TkTextMark.new($code_text, '1.0')
  #$code_text.set_insert('1.0')
  TkTextMarkInsert.new($code_text,'1.0')
  fid.close
end

# aboutBox
#
#      Pops up a message box with an "about" message
#
def aboutBox
  Tk.messageBox('icon'=>'info', 'type'=>'ok', 'title'=>'About Widget Demo', 
		'message'=>"Ruby/Tk widget demonstration Ver.1.0.2\n\n( based on Tk 8.1 Copyright (c) 1996-1997 Sun Microsystems, Inc. )\n\nRunning Version :: Ruby#{VERSION}/Tk#{$tk_version}")
end

################################

Tk.mainloop