Re: tooltips

[Paul Pogonyshev <pogonyshev gmx net>]

Tristan Van Berkom wrote:
> Paul Pogonyshev wrote:
> [...]
>
> > But I have many areas, the widget is much like two-dimensional grid.
> > There can easily be like 100 areas.  Think of GtkTreeView with many
> > columns.
> >
> > Besides, it seems that GtkTooltips works only with widgets.  So, I'd
> > have to wrap each `area' in a separate widget which is cumbersome.
> > The widget is scrollable and on overall, there can be thousands of
> > those areas.  This means that either the overhead would be really bad
> > or I'd have to write some evil code to create widgets for only those
> > areas that are visible in the viewport, gah...
> >  
> Its not that bad, I'm sure many applications have the same need;
> just install a handler for "motion-notify-event" (make sure that
> your widget has been realized with the correct event mask)
> and call gtk_tooltips_set_tip() whenever the tooltip should change.

You are probably right, but I haven't been able to make the tips show
up :(  I didn't even manage to add tooltips to a GtkTextView (not even
after gtk_widget_add_events (text_view, GDK_POINTER_MOTION_MASK) and
unwrapping it from GtkScrolledWindow.)

My widget uses two windows, but the `motion-notify-event' signal does
get emited on one of them, my handler is invoked.  But the tooltips
just don't appear :(

Window setup code is below.  Any ideas?

Paul



static void
gtk_sgf_tree_view_realize (GtkWidget *widget)
{
  GtkSgfTreeView *view = GTK_SGF_TREE_VIEW (widget);
  GdkWindowAttr attributes;
  const gint attributes_mask = (GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL
                                | GDK_WA_COLORMAP);
  const gint event_mask = (GDK_EXPOSURE_MASK
                           | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK
                           | GDK_POINTER_MOTION_MASK);

  if (!view->hadjustment || !view->vadjustment)
    gtk_sgf_tree_view_set_scroll_adjustments (view, NULL, NULL);

  if (view->current_tree) {
    sgf_game_tree_get_map_dimensions (view->current_tree,
                                      &view->map_width, &view->map_height);

    update_view_port (view);
  }

  GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);

  attributes.event_mask  = 0;
  attributes.x           = widget->allocation.x;
  attributes.y           = widget->allocation.y;
  attributes.width       = widget->allocation.width;
  attributes.height      = widget->allocation.height;
  attributes.wclass      = GDK_INPUT_OUTPUT;
  attributes.visual      = gtk_widget_get_visual (widget);
  attributes.colormap    = gtk_widget_get_colormap (widget);
  attributes.window_type = GDK_WINDOW_CHILD;

  widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
                                   &attributes, attributes_mask);
  gdk_window_set_user_data (widget->window, view);

  gdk_window_set_back_pixmap (widget->window, NULL, FALSE);

  attributes.event_mask  = gtk_widget_get_events (widget) | event_mask;
  attributes.x           = - view->hadjustment->value;
  attributes.y           = - view->vadjustment->value;
  attributes.width       = view->hadjustment->upper;
  attributes.height      = view->vadjustment->upper;

  view->output_window = gdk_window_new (widget->window,
                                        &attributes, attributes_mask);
  gdk_window_set_user_data (view->output_window, view);

  widget->style = gtk_style_attach (widget->style, widget->window);
  gtk_style_set_background (widget->style, view->output_window,
                            GTK_STATE_NORMAL);

  gdk_window_show (view->output_window);

  GTK_WIDGET_CLASS (parent_class)->realize (widget);
}