dnd bug?: dragging from clist causes selection

[Todd Dukes <tdukes ibmoto com>]

The short program below creates a clist and  sets it
as a drag source.

Open the list and scroll down about midway. Do a short drag.
The item at the top of the window becomes selected. Sometimes
I have seen a short drag actually scroll the window to the top
or bottom of the tree.

The program is for gtk--. But if someone would like I will try to
convert it to C. 

Todd.


-- 
   ==============================================================
   | Todd Dukes                      E-MAIL:  tdukes@ibmoto.com |
   | Motorola Somerset                  Phone:   (512) 424-8008 |
   | MS OE70                                                    |
   | 6300 Bridgepoint Parkway Building #3                       |
   | Austin, Texas 78730                                        |       
   ==============================================================
/*
 g++ -o ctreeTest -I. `gtk-config --cflags` `gtk-config --libs` -lgtkmm-1.1 ctreeTest.C
*/

#include <stream.h>
#include <gdk/gdkx.h>
#include <gtk--.h>

#include <string>
#include <list>
#include <set>

typedef list<string> StringL;

const int numberOfColumns = 3;
const int columnWithTree = 0;

gchar *titles[] = { "tree title 1",
		    "tree title 2",
		    "tree title 3" };

enum { TARGET_MACRO_ITEMS};
static GtkTargetEntry gte = { "macro items",
			      0, TARGET_MACRO_ITEMS};

class MyWindow : public Gtk_Window {
public:
  MyWindow();
private:
  Gtk_VBox vbox;
  Gtk_ScrolledWindow scroller;
  Gtk_CTree ctree;
  Gtk_Button b;
};

MyWindow::MyWindow():
  ctree( numberOfColumns, columnWithTree, titles),
  b("Quit")
{
  set_title("ctree test");
  set_usize(300,400);
  vbox.pack_start(scroller);
  scroller.add(&ctree);
  scroller.show();
  ctree.show();
  vbox.pack_start(b,false,false,false);
  b.show();
  connect_to_method( b.clicked, Gtk_Main::instance(), &Gtk_Main::quit);
  ctree.drag_source_set( GDK_BUTTON1_MASK, // start_button_mask GdkModifierType
 			  &gte,            // targets (GtkTargetEntry *)
 			  1,               // n_targets (gint)
 			  GDK_ACTION_COPY  // actions (GdkDragAction)
 			  );
  const char *text[3];
  char buf1[100];
  char buf2[100];
  char buf3[100];
  sprintf(buf1, "root");
  sprintf(buf2, "2nd col");
  sprintf(buf3, "3rd col");
  text[0] = buf1;
  text[1] = buf2;
  text[2] = buf3;
  Gtk_CTreeNode node = ctree.insert_node( Gtk_CTreeNode(0), Gtk_CTreeNode(0), text,
					  (guint8) 0,
					  (GdkPixmap*) 0,
					  (GdkPixmap*) 0,
					  (GdkPixmap*) 0,
					  (GdkPixmap*) 0,
					  false, false);
  ctree.set_selection_mode(GTK_SELECTION_MULTIPLE);
  for ( int i = 1; i < 100; i++) {
    sprintf(buf1, "item %d" , i);
    sprintf(buf2, "2nd col");
    sprintf(buf3, "3rd col");
    text[0] = buf1;
    text[1] = buf2;
    text[2] = buf3;
    ctree.insert_node( node, Gtk_CTreeNode(0), text,
			(guint8) 0,
			(GdkPixmap*) 0,
			(GdkPixmap*) 0,
			(GdkPixmap*) 0,
			(GdkPixmap*) 0,
			true, false);
  }
  add(&vbox);
  vbox.show();
}

int main(int argc, char *argv[]) {
  Gtk_Main m(&argc, &argv);
  MyWindow myWindow;
  /* MyWindow */ 
  myWindow.show();
  m.run();
  return 0;
}