No one has any insight here? It seems to me that a call to gtk_widget_size_request() should be followed by a gtk_widget_size_allocate() when generated by a gtk_widget_queue_resize(), especially if the program goes idle.
Is there something about the size negotiation process that I'm misunderstanding? Thanks On Sun, Sep 19, 2004 at 12:02:48PM -0400, Stephen Bach wrote: > Hello, > > I've run into an issue in a program I'm writing where sometimes a call to > gtk_widget_queue_resize() ends in a request rather than an allocate. I've > put together a short test case (tested in GTK+ 2.4.4) which keeps the spirit > of the program intact (see below). > > First, a little context -- connecting to the toplevel window's > configure-event to queue a resize on one of its grandchildren probably seems > unconventional and even redundant, but it's a requirement of my program (not > this test case) because the request function of that grandchild optimizes > itself to the window's width (i.e. the grandchild needs more information than > just the size requests of its children). In the real program the change in > the window's width is passed on and then the queue_resize is made. > > All of that is beside the point. Here is the problem: _sometimes_ when the > window is resized, there is no allocation of the grandchild label after a > request. If the window is resized again, _then_ the allocation happens > (usually followed by another unfulfilled size request). > > One thing that's kind-of strange is that if the label is added directly to > the scrolledwindow (without being added to the vbox, which then gets put into > the scrolledwindow), everything works as it should -- every size request is > followed by a size allocate. I also tried using a table instead of a vbox, > but the result is the same. > > Insight welcome. > > Thanks, > > Stephen > > ========= > > #include <gtk/gtk.h> > > static void > allocate_callback(GtkWidget *label, GtkAllocation *allocation, gpointer data) { > g_print("(allocate)"); > } > > static void > request_callback(GtkWidget *label, GtkRequisition *requisition, gpointer data) { > g_print("(request)"); > } > > static gboolean > configure_callback(GtkWidget* window, GdkEventConfigure* event, gpointer data) { > GtkWidget* label = data; > > /* Only queue resize if the width is changed */ > if (event->width != window->allocation.width) > gtk_widget_queue_resize(label); > > return FALSE; > } > > int > main(int argc, char* argv[]) { > > GtkWidget* window; > GtkWidget* scrolled_window; > GtkWidget* vbox; > GtkWidget* label; > > gtk_init (&argc, &argv); > > window = gtk_window_new(GTK_WINDOW_TOPLEVEL); > scrolled_window = gtk_scrolled_window_new(NULL, NULL); > vbox = gtk_vbox_new(FALSE, 0); > label = gtk_label_new("Testing"); > > g_signal_connect(G_OBJECT(label), "size-allocate", > G_CALLBACK(allocate_callback), NULL); > g_signal_connect(G_OBJECT(label), "size-request", > G_CALLBACK(request_callback), NULL); > g_signal_connect(G_OBJECT(window), "configure-event", > G_CALLBACK(configure_callback), label); > > gtk_scrolled_window_set_policy( > GTK_SCROLLED_WINDOW(scrolled_window), > GTK_POLICY_NEVER, > GTK_POLICY_ALWAYS); > > gtk_box_pack_start(GTK_BOX(vbox), label, FALSE, FALSE, 0); > gtk_scrolled_window_add_with_viewport( > GTK_SCROLLED_WINDOW(scrolled_window), vbox); > gtk_container_add(GTK_CONTAINER(window), scrolled_window); > > gtk_widget_show(label); > gtk_widget_show(vbox); > gtk_widget_show(scrolled_window); > gtk_widget_show(window); > > gtk_main(); > > return 0; > } > > _______________________________________________ > gtk-list mailing list > [EMAIL PROTECTED] > http://mail.gnome.org/mailman/listinfo/gtk-list > > _______________________________________________ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list