- GList *tmp_list;
- GtkPizzaAdjData data;
-
- data.dx = dx;
- data.dy = dy;
-
- tmp_list = pizza->children;
- while (tmp_list)
- {
- GtkPizzaChild *child = tmp_list->data;
- tmp_list = tmp_list->next;
-
- child->widget->allocation.x += dx;
- child->widget->allocation.y += dy;
-
- if (GTK_WIDGET_NO_WINDOW (child->widget) &&
- GTK_IS_CONTAINER (child->widget))
- gtk_container_forall (GTK_CONTAINER (child->widget),
- gtk_pizza_adjust_allocations_recurse,
- &data);
- }
-}
-
-/* Callbacks */
-
-/* Send a synthetic expose event to the widget
- */
-static void
-gtk_pizza_expose_area (GtkPizza *pizza,
- gint x, gint y, gint width, gint height)
-{
- if (pizza->visibility == GDK_VISIBILITY_UNOBSCURED)
- {
- GdkEventExpose event;
-
- event.type = GDK_EXPOSE;
- event.send_event = TRUE;
- event.window = pizza->bin_window;
- event.count = 0;
-
- event.area.x = x;
- event.area.y = y;
- event.area.width = width;
- event.area.height = height;
-
- gdk_window_ref (event.window);
- gtk_widget_event (GTK_WIDGET (pizza), (GdkEvent *)&event);
- gdk_window_unref (event.window);
- }
-}
-
-/* This function is used to find events to process while scrolling
- */
-
-static Bool
-gtk_pizza_expose_predicate (Display *display,
- XEvent *xevent,
- XPointer arg)
-{
- if ((xevent->type == Expose) ||
- ((xevent->xany.window == *(Window *)arg) &&
- (xevent->type == ConfigureNotify)))
- return True;
- else
- return False;
-}
-
-/* This is the main routine to do the scrolling. Scrolling is
- * done by "Guffaw" scrolling, as in the Mozilla XFE, with
- * a few modifications.
- *
- * The main improvement is that we keep track of whether we
- * are obscured or not. If not, we ignore the generated expose
- * events and instead do the exposes ourself, without having
- * to wait for a roundtrip to the server. This also provides
- * a limited form of expose-event compression, since we do
- * the affected area as one big chunk.
- */
-
-void
-gtk_pizza_scroll (GtkPizza *pizza, gint dx, gint dy)
-{
- GtkWidget *widget;
- XEvent xevent;
-
- gint x,y,w,h,border;
-
- widget = GTK_WIDGET (pizza);
-
- pizza->xoffset += dx;
- pizza->yoffset += dy;
-
- if (!GTK_WIDGET_MAPPED (pizza))
- {
- gtk_pizza_position_children (pizza);
- return;
- }
-
- gtk_pizza_adjust_allocations (pizza, -dx, -dy);
-
- if (pizza->shadow_type == GTK_MYSHADOW_NONE)
- border = 0;
- else
- if (pizza->shadow_type == GTK_MYSHADOW_THIN)
- border = 1;
- else
- border = 2;
-
- x = 0;
- y = 0;
- w = widget->allocation.width - 2*border;
- h = widget->allocation.height - 2*border;
-
- if (dx > 0)
- {
- if (gravity_works)
- {
- gdk_window_resize (pizza->bin_window,
- w + dx,
- h);
- gdk_window_move (pizza->bin_window, x-dx, y);
- gdk_window_move_resize (pizza->bin_window, x, y, w, h );
- }
- else
- {
- /* FIXME */
- }
-
- gtk_pizza_expose_area (pizza,
- MAX ((gint)w - dx, 0),
- 0,
- MIN (dx, w),
- h);
- }
- else if (dx < 0)
- {
- if (gravity_works)
- {
- gdk_window_move_resize (pizza->bin_window,
- x + dx,
- y,
- w - dx,
- h);
- gdk_window_move (pizza->bin_window, x, y);
- gdk_window_resize (pizza->bin_window, w, h );
- }
- else
- {
- /* FIXME */
- }
-
- gtk_pizza_expose_area (pizza,
- 0,
- 0,
- MIN (-dx, w),
- h);
- }
-
- if (dy > 0)
- {
- if (gravity_works)
- {
- gdk_window_resize (pizza->bin_window, w, h + dy);
- gdk_window_move (pizza->bin_window, x, y-dy);
- gdk_window_move_resize (pizza->bin_window,
- x, y, w, h );
- }
- else
- {
- /* FIXME */
- }
-
- gtk_pizza_expose_area (pizza,
- 0,
- MAX ((gint)h - dy, 0),
- w,
- MIN (dy, h));
- }
- else if (dy < 0)
- {
- if (gravity_works)
- {
- gdk_window_move_resize (pizza->bin_window,
- x, y+dy, w, h - dy );
- gdk_window_move (pizza->bin_window, x, y);
- gdk_window_resize (pizza->bin_window, w, h );
- }
- else
- {
- /* FIXME */
- }
- gtk_pizza_expose_area (pizza,
- 0,
- 0,
- w,
- MIN (-dy, (gint)h));
- }
-
- gtk_pizza_position_children (pizza);
-
- /* We have to make sure that all exposes from this scroll get
- * processed before we scroll again, or the expose events will
- * have invalid coordinates.
- *
- * We also do expose events for other windows, since otherwise
- * their updating will fall behind the scrolling
- *
- * This also avoids a problem in pre-1.0 GTK where filters don't
- * have access to configure events that were compressed.
- */
-
- gdk_flush();
- while (XCheckIfEvent(GDK_WINDOW_XDISPLAY (pizza->bin_window),
- &xevent,
- gtk_pizza_expose_predicate,
- (XPointer)&GDK_WINDOW_XWINDOW (pizza->bin_window)))
- {
- GdkEvent event;
- GtkWidget *event_widget;
-
- if ((xevent.xany.window == GDK_WINDOW_XWINDOW (pizza->bin_window)) &&
- (gtk_pizza_filter (&xevent, &event, pizza) == GDK_FILTER_REMOVE))
- continue;
-
- if (xevent.type == Expose)
- {
- event.expose.window = gdk_window_lookup (xevent.xany.window);
- gdk_window_get_user_data (event.expose.window,
- (gpointer *)&event_widget);
-
- if (event_widget)
- {
- event.expose.type = GDK_EXPOSE;
- event.expose.area.x = xevent.xexpose.x;
- event.expose.area.y = xevent.xexpose.y;
- event.expose.area.width = xevent.xexpose.width;
- event.expose.area.height = xevent.xexpose.height;
- event.expose.count = xevent.xexpose.count;
-
- gdk_window_ref (event.expose.window);
- gtk_widget_event (event_widget, &event);
- gdk_window_unref (event.expose.window);
- }
- }
- }
-}
-
-/* The main event filter. Actually, we probably don't really need
- * to install this as a filter at all, since we are calling it
- * directly above in the expose-handling hack. But in case scrollbars
- * are fixed up in some manner...
- *
- * This routine identifies expose events that are generated when
- * we've temporarily moved the bin_window_origin, and translates
- * them or discards them, depending on whether we are obscured
- * or not.
- */
-static GdkFilterReturn
-gtk_pizza_filter (GdkXEvent *gdk_xevent,
- GdkEvent *event,
- gpointer data)
-{
- XEvent *xevent;
- GtkPizza *pizza;
projects / wxWidgets.git / blobdiff