From: Ferenc Engard <ferenc@...>
Date: 2004-12-20T08:57:36+09:00
Subject: Re: [Tk] grid manager with '-', 'x', '^'

Hi!

email55555 email55555 wrote:
> 
> Just curious about special char with grid manager:
> 
> On Tcl/Tk:
> grid .a - -
> grid ^ .b x
[...]
> So, grid manager with relative placement on Ruby/Tk works only when
> the "first" is *win*.
> 
> Is this right or do we have other trick for it ?

I do not know, but I use a wrapper function for building grids:

  # Building a GUI with the Grid Geometry Manager.
  # widgets: Array of Arrays of widgets (and sticky info) (arrays are
the rows,
  #   widgets in the arrays are the cells)
  # widgethash: if nil, then <<widgets>> contain TkWindow objects. If
not nil,
  #   then <<widgethash>> is a hash of widgets, and <<widgets>> contains
the keys in widgethash.
  # common: hash of common options to every widgets.
  def buildSimpleGrid(widgets,widgethash=nil,common={})
    rowspan={} # A '^' widgetek rowspan-t jelentenek, mint a tk grid
parancsn�l
    widgets.each_with_index {|row,i|
      colspan=[nil,1] # A '-' widgetek colspan-t jelentenek, mint a tk
grid parancsn�l
      row.each_with_index {|cell,j|
        if cell.respond_to? :shift
          widget=cell.shift; sticky=cell.shift; sticky='nw' if
sticky.nil? # default
          opts=cell.shift
        else
          widget=cell; sticky='nw' # default
        end
        if widget=='-'
            colspan[1]+=1
            colspan[0].grid_config('columnspan',colspan[1])
            #~ debug "colspan: widget #{colspan[0].to_eval}, colspan
#{colspan[1]}"
            next
        elsif widget=='^' # rowspan
          raise "buildSimpleGrid problem!" if !rowspan[j] ||
!rowspan[j][0]
          rowspan[j][1]+=1
          rowspan[j][0].grid_config('rowspan',rowspan[j][1])
          next
        elsif widget=='x'
          next
        else
          widget=widgethash[widget] if !widgethash.nil?
        end
        h=common.dup.update({"row"=>i,"column"=>j,"sticky"=>sticky})
        h.update(opts) if !opts.nil?
        widget.grid(h)
        colspan[0]=widget; colspan[1]=1
        rowspan[j]=[]; rowspan[j] << widget; rowspan[j] << 1
      }
      
    }
  end

And you can use it like this:

tmpgrid=[
	[[widget_1_1,'e'], [widget_1_2,'ew'],'-'],
	[[widget_23_1,'e'], [widget_2_23,'ew']],
	['^',[widget_3_2,'w'],[widget_3_3,'w']]
]
buildSimpleGrid(tmpgrid,nil,{'in'=>parentFrame})

I wrote the example by hand; I hope it is understandable.
The numbers in the end of the widget names mean the rows and
columns where the given widget will appear.

Hereby I place this piece of code in public domain. 
Just do not patent it! ;-)

Bye:
Ferenc