From: Matthew Margolis <mrmargolis@...>
Date: 2004-10-08T21:18:21+09:00
Subject: Re: GUI Toolkit questions

Hidetoshi NAGAI wrote:

>Hi, 
>
>From: MATTHEW REUBEN MARGOLIS <mrmargolis@wisc.edu>
>Subject: GUI Toolkit questions
>Date: Fri, 8 Oct 2004 04:08:51 +0900
>Message-ID: <242bd3243436.243436242bd3@wiscmail.wisc.edu>
>  
>
>>I need to be able to display a large grid of 300 tiles, each of which
>>can have a different picture that can change during execution.  I will
>>need to be able to treat these tiles as individual buttons or have some
>>other easy way to keep track of which tile the mouse is currently
>>over/clicking on.  I will also need to be able to create a tool
>>window(possibly floating) that will contain all the tools that you can
>>use to operate on the tile grid.
>>
>>Cross platform(Windows, Linux, Mac OS X compatibility would be optimal.
>>    
>>
>
>Hmmm... I'm interested that. 
>
>I append a sample script of Ruby/Tk to this mail. 
>It's a little large because of image data. 
>The script shows clickable tiles on a scrollable frame. 
>Each tile has a configurable image and a configurable label.
>
>However, if you must really support 300x300 tiles (total 90,000 tiles)
>on only one frame, it is too heavy for the script. 
>Probably, the limit of the script is a few thousands tiles 
>(e.g. 50 x 40 = 2,000 tiles). 
>
>                                  Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
>------------------------------------------
>#!/usr/bin/env ruby
>
>require 'tk'
>
>class MapFrame < TkWindow
>  include TkComposite
>
>  #########################################
>
>  @@borderwidth = 0
>  @@highlightthickness = 0
>
>  @@labelfont = ['courier', 6]
>  @@label_bg = '#101010'
>  @@label_fg = 'white'
>
>  @@imgwidth  = 50
>  @@imgheight = 50
>
>  @@grid_pad  = 1
>  @@frame_bg_color  = 'gray'
>
>  #########################################
>
>  def button_callback(x, y)
>    # please override this method
>    puts "Button #{x}x#{y} is clicked!!"
>  end
>
>  #########################################
>
>  def initialize_composite(width, height)
>    @width  = width
>    @height = height
>
>    # create canvas
>    @h_scroll = TkScrollbar.new(@frame)
>    @v_scroll = TkScrollbar.new(@frame)
>
>    @canvas = TkCanvas.new(@frame)
>    @canvas.xscrollbar(@h_scroll)
>    @canvas.yscrollbar(@v_scroll)
>
>    @path = @canvas.path
>
>    TkGrid.rowconfigure(@frame, 0, :weight=>1, :minsize=>0)
>    TkGrid.columnconfigure(@frame, 0, :weight=>1, :minsize=>0)
>    @canvas.grid(:row=>0, :column=>0, :sticky=>:news)
>    @h_scroll.grid(:row=>1, :column=>0, :sticky=>:ew)
>    @v_scroll.grid(:row=>0, :column=>1, :sticky=>:ns)
>
>    # create a bindtag to scroll the canvas (events are generated on buttons)
>    btag = TkBindTag.new
>    btag.bind('3', proc{|x,y| 
>		@canvas.scan_mark(x - @canvas.winfo_rootx, 
>				  y - @canvas.winfo_rooty)
>	      }, '%X %Y')
>    btag.bind('B3-Motion', proc{|x,y| 
>		@canvas.scan_dragto(x - @canvas.winfo_rootx, 
>				  y - @canvas.winfo_rooty)
>	      }, '%X %Y')
>
>    @base = TkFrame.new(@canvas, :background=>@@frame_bg_color)
>
>    # create buttons
>    @buttons = Array.new(@width){|x|
>      Array.new(@height){|y|
>	TkLabel.new(@base, 
>		    :image=>TkPhotoImage.new(:width=>@@imgwidth, 
>					     :height=>@@imgheight), 
>		    :borderwidth=>@@borderwidth, 
>		    :highlightthickness=>@@highlightthickness){|b|
>	  bindtags(bindtags.insert(1, btag)) # to scroll the canvas
>
>	  @label = TkLabel.new(b, :text=>"#{x} x #{y}", :font=>@@labelfont, 
>			       :background=>@@label_bg, 
>			       :foreground=>@@label_fg, 
>			       :padx=>1, :pady=>0){
>	    place(:anchor=>:s, :rely=>1.0, :y=>-1, :relx=>0.5)
>	  }
>	  def self.label; @label; end
>
>	  grid(:row=>y, :column=>x, 
>	       :padx=>@@grid_pad, :pady=>@@grid_pad, :sticky=>:news)
>	}.bind('ButtonRelease-1', proc{button_callback(x,y)})
>      }
>    }
>
>    @base_win = TkcWindow.new(@canvas, 0, 0, :window=>@base, :anchor=>:nw)
>
>    Tk.update_idletasks
>    @canvas.scrollregion(@base_win.bbox)
>  end
>
>  def [](idx)
>    @buttons[idx]
>  end
>end
>
>map = MapFrame.new(nil, 40, 30).pack
>
>map[4][2].background('red')
>map[3][2].background('red')
>map[3][3].background('red')
>map[4][3].background('red')
>
>p map[3][5].label.text
>
>map[2][4].image[:data] = <<'EOI'
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>
>img = TkPhotoImage.new(:data=><<'EOI')
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>UHT+APpAoMYQDj+EfIL3JRAlP2AogbHk59CXQ4EACSGFDh+6RhL2kVoBDJ8NgOPGvXvHjt24
>DyZmSBnmJJcIGzYaQGDQKxucJ4fAUPpyqEqlQ4cqAaJFixSjYqS4cCE1aR84Z+6cPXuX7927
>cZtuzJghaBqWV0QINAhRg44TIF3AfHEhC9KhKmAOBQrkZVQuW41IMerySRYjdPTonVOWI0eT
>Pu/yZcrRgEatWmkobRLhQUYZFC1IBHKRwcUhSoa+fDlECQ4cOKxo0foEyM0nK6XiwNs3q4gN
>ESCYrNokgkiMFIKCAHmSycMQJUYYoOjCiMQJL0C8MHLjBUylQ4y+RGIfVYwWIkCkbhlShI5b
>Ggw/YjQgkEOECBsdaHRqBAdLQAA7
>EOI
>
>map[4][1].image.copy(img)
>map[4][2].image.copy(img)
>map[5][1].image.copy(img)
>map[5][2].image.copy(img)
>
>#################################
>
>Tk.mainloop
>
>  
>
Thank you very much for the sample code, I will be looking through it 
extensively later today.  The board I need to construct will be 20x15, 
so a total of 300 tiles not 300x300.

Thank you,
Matthew Margolis