Alpar had the key, focus can be set in the window class. But it is not enough, the focused widget has to be activated, as well! Was a hard task to find out... By the way, two compilation warnings are removed.
     1.1 --- a/gui/graph_displayer_canvas-edge.cc	Wed Aug 03 19:10:12 2005 +0000
     1.2 +++ b/gui/graph_displayer_canvas-edge.cc	Sun Aug 07 14:17:11 2005 +0000
     1.3 @@ -25,7 +25,7 @@
     1.4      {
     1.5        for (EdgeIt i(mapstorage.graph); i!=INVALID; ++i)
     1.6  	{
     1.7 -	  double v=abs((*actual_map)[i]);
     1.8 +	  double v=fabs((*actual_map)[i]);
     1.9  	  int w;
    1.10  	  if(min==max)
    1.11  	    {
     2.1 --- a/gui/graph_displayer_canvas-event.cc	Wed Aug 03 19:10:12 2005 +0000
     2.2 +++ b/gui/graph_displayer_canvas-event.cc	Sun Aug 07 14:17:11 2005 +0000
     2.3 @@ -622,6 +622,10 @@
     2.4  			canvasentrywidget=new Gnome::Canvas::Widget(displayed_graph, entry_coos.x, entry_coos.y, entrywidget);
     2.5  			canvasentrywidget->property_width().set_value(edgetextmap[active_edge]->property_text_width().get_value()*4);
     2.6  			canvasentrywidget->property_height().set_value(edgetextmap[active_edge]->property_text_height().get_value()*1.5);
     2.7 +
     2.8 +			//setting the focus to newly created widget
     2.9 +			parentwin->set_focus(entrywidget);
    2.10 +			parentwin->activate_focus();
    2.11  		      }
    2.12  		  }
    2.13  	      }
     3.1 --- a/gui/graph_displayer_canvas-node.cc	Wed Aug 03 19:10:12 2005 +0000
     3.2 +++ b/gui/graph_displayer_canvas-node.cc	Sun Aug 07 14:17:11 2005 +0000
     3.3 @@ -24,7 +24,7 @@
     3.4      {
     3.5        for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)
     3.6  	{
     3.7 -	  double v=abs((*actual_map)[i]);
     3.8 +	  double v=fabs((*actual_map)[i]);
     3.9  	  int w;
    3.10  	  if(min==max)
    3.11  	    {
     4.1 --- a/gui/graph_displayer_canvas.cc	Wed Aug 03 19:10:12 2005 +0000
     4.2 +++ b/gui/graph_displayer_canvas.cc	Sun Aug 07 14:17:11 2005 +0000
     4.3 @@ -2,12 +2,14 @@
     4.4  #include "broken_edge.h"
     4.5  #include <math.h>
     4.6  
     4.7 -GraphDisplayerCanvas::GraphDisplayerCanvas(MapStorage & ms, MapWin & mw) :
     4.8 +GraphDisplayerCanvas::GraphDisplayerCanvas(MapStorage & ms, MapWin & mw, Gtk::Window * mainwin) :
     4.9    nodesmap(ms.graph), edgesmap(ms.graph), edgetextmap(ms.graph),
    4.10    nodetextmap(ms.graph), displayed_graph(*(root()), 0, 0),
    4.11    canvasentrywidget(NULL), mapstorage(ms), isbutton(0), active_item(NULL),
    4.12    target_item(NULL), nodemap_to_edit(""), edgemap_to_edit(""), mapwin(mw)
    4.13  {
    4.14 +  parentwin=mainwin;
    4.15 +
    4.16    //base event handler is move tool
    4.17    actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::moveEventHandler), false);
    4.18    actual_tool=MOVE;
     5.1 --- a/gui/graph_displayer_canvas.h	Wed Aug 03 19:10:12 2005 +0000
     5.2 +++ b/gui/graph_displayer_canvas.h	Sun Aug 07 14:17:11 2005 +0000
     5.3 @@ -18,7 +18,7 @@
     5.4    typedef Gnome::Canvas::CanvasAA Parent;
     5.5  
     5.6  public:
     5.7 -  GraphDisplayerCanvas(MapStorage &, MapWin &);
     5.8 +  GraphDisplayerCanvas(MapStorage &, MapWin &, Gtk::Window *);
     5.9    virtual ~GraphDisplayerCanvas();
    5.10  
    5.11    ///Changes the linewidth attribute according to the given map.
    5.12 @@ -177,6 +177,10 @@
    5.13    ///We need to store mapwin, to be able to ask the appropriate values for properties of new items.
    5.14    MapWin & mapwin;
    5.15  
    5.16 +  ///We need to store the parent window to be able to set the focus on a given widget
    5.17 +  ///We will use this variable to activate the set focus on entry widget in the case of editing map values.
    5.18 +  Gtk::Window * parentwin;
    5.19 +
    5.20  };
    5.21  
    5.22  #endif //GRAPH_DISPLAYER_CANVAS_H
     6.1 --- a/gui/main_win.cc	Wed Aug 03 19:10:12 2005 +0000
     6.2 +++ b/gui/main_win.cc	Sun Aug 07 14:17:11 2005 +0000
     6.3 @@ -2,9 +2,8 @@
     6.4  
     6.5  MainWin::MainWin(const std::string& title) :
     6.6    mapwin("Map Setup", mapstorage, gd_canvas),
     6.7 -  newmapwin("Creating new map", gd_canvas), gd_canvas(mapstorage, mapwin)
     6.8 +  newmapwin("Creating new map", gd_canvas), gd_canvas(mapstorage, mapwin, (Gtk::Window *)this)
     6.9  {
    6.10 -
    6.11    set_title (title);
    6.12    set_default_size(WIN_WIDTH,WIN_HEIGHT);
    6.13    add(vbox);