title: How to set a fixed size for gtk grid
body: <p>Currently I'm working on a non-resizable 576x512 <code>GtkWindow</code>,and I put a <code>GtkGrid</code> as its child. I want to divide the window into 9x8 areas, which means the size of each grid is 64x64.<br />
  I tried to set the <code>height-request</code> and <code>width-request</code> 64 for one of the grids, but only that grid had the right size. Then I made <code>row_homogeneous</code> and <code>height_homogeneous</code> true, but it still didn't show correctly.<br />
  So how can I let each grid 64x64?<br />
  (by the way all settings are default)</p>
  <pre><code>using Gtk
  win=GtkWindow(&quot;Test&quot;,576,512;resizable=false,visible=true)
  g=GtkGrid()
  push!(win,g)
  g[1,1]=GtkButton(&quot;A&quot;)
  g[2,2]=GtkButton(&quot;B&quot;)
  # what to do ?
  
  showall(win)
  </code></pre>
  <hr />
  <p>the current main problem is the GtkWidget at (1,1) and (1,3) are neignbours instead of a space in between</p>