RE: [gtk-list] Clicking on tables

["Damon Chaplin" <DAChaplin email msn com>]

> I have a table with pixmaps in each cell and I want to be able to have the
> user click on any cell and have it call a function with the coordinates of
> the cell as a parameter, however I dont know how to do this.
> Can anyone tell me how or give me an example of where its done?

I can think of two ways. Both require you to add "button_press" signals to
all the pixmaps in the table.

1) When creating the table, put the coordinates of each pixmap in its data
   hash, with something like:

      gtk_object_set_data(GTK_OBJECT(pixmap), "x", (gpointer) x);
      gtk_object_set_data(GTK_OBJECT(pixmap), "y", (gpointer) y);
      gtk_signal_connect(GTK_OBJECT (pixmap), "button_press_event",
		      GTK_SIGNAL_FUNC(on_button_press), NULL);

   Then in the signal handler you can retrieve the coordinates with

static gint
on_button_press(GtkWidget *pixmap,
		    GdkEventButton *event,
		    gpointer data)
{
	gint x, y;
      x = (gint)gtk_object_get_data(GTK_OBJECT(pixmap), "x");
      y = (gint)gtk_object_get_data(GTK_OBJECT(pixmap), "y");
...


2) In the signal handler, step through each of the table's children and
   compare with the selected pixmap.

static gint
on_button_press(GtkWidget *pixmap,
		    GdkEventButton *event,
		    gpointer data)
{
  gint x, y;  GList *children;
  GtkTableChild *child;

  children = GTK_TABLE(table)->children;
  while (children) {
    child = children->data;
    if (child->widget == widget) {
      x = child->left_attach;
	y = child->top_attach;
	break;
    }
    children = children->next;
  }
...



Damon