Re: Change an image on a button

[Guillaume Charhon <pub charhon wanadoo fr>]

Thanks for your answer, I've find a solution with

gtk_container_remove() and gtk_container_add()

But I must do a gtk_widget_show_all(pButton)  !!!

Guillaume Charhon

David Nec(as (Yeti) a écrit :
> On Wed, Nov 15, 2006 at 10:40:06PM +0100, Guillaume Charhon wrote:
>   
> > But I have read everything and it doesn't work!
> >     
>
> You are right.  The problem is not with reference counting
> any more.  Something strange happens to the image widget
> that makes it invisible after removal from the button.  This
> is specific to gtk_button_set_image() because it works
> normally.  I attach two demonstration programs for
> reference, one using gtk_button_set_image(), the other one
> normal gtk_container_remove() and gtk_container_add(). The
> first one does not work (image becomes invisible), the
> second one works.  I suggest to file a bugzilla bug and
> attach a program demonstrating the problem to it.
>
> Yeti
>
>
> --
> Whatever.
>
> ---------------------------------------------------------------------------------------
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>
>   
> ------------------------------------------------------------------------
>
> #include <gtk/gtk.h>
>
> static void
> switch_images(GtkWidget *button)
> {
>     GtkWidget *image1, *image2;
>
>     image1 = gtk_button_get_image(GTK_BUTTON(button));
>     image2 = g_object_get_data(G_OBJECT(button), "other-image");
>     g_print("Current image: %s, switching to %s\n",
>             (const gchar*)g_object_get_data(G_OBJECT(image1), "id"),
>             (const gchar*)g_object_get_data(G_OBJECT(image2), "id"));
>     gtk_button_set_image(GTK_BUTTON(button), image2);
>     g_object_set_data(G_OBJECT(button), "other-image", image1);
>     g_print("New image realized: %d, mapped: %d, visible: %d\n",
>             GTK_WIDGET_REALIZED(image2),
>             GTK_WIDGET_MAPPED(image2),
>             GTK_WIDGET_VISIBLE(image2));
> }
>
> int
> main(int argc, char *argv[])
> {
>     GtkWidget *window, *target, *switcher, *vbox, *image1, *image2;
>
>     gtk_init(&argc, &argv);
>     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
>     g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
>
>     vbox = gtk_vbox_new(FALSE, 0);
>     gtk_container_add(GTK_CONTAINER(window), vbox);
>
>     image1 = gtk_image_new_from_stock(GTK_STOCK_YES, GTK_ICON_SIZE_BUTTON);
>     g_object_set_data(G_OBJECT(image1), "id", "Yes");
>     g_object_ref(image1);
>
>     image2 = gtk_image_new_from_stock(GTK_STOCK_NO, GTK_ICON_SIZE_BUTTON);
>     g_object_set_data(G_OBJECT(image2), "id", "No");
>     g_object_ref(image2);
>
>     target = gtk_button_new_with_label("Target");
>     gtk_button_set_image(GTK_BUTTON(target), image1);
>     g_object_set_data(G_OBJECT(target), "other-image", image2);
>     gtk_box_pack_start(GTK_BOX(vbox), target, FALSE, FALSE, 0);
>
>     switcher = gtk_button_new_with_label("Switch");
>     gtk_box_pack_start(GTK_BOX(vbox), switcher, FALSE, FALSE, 0);
>     g_signal_connect_swapped(switcher, "clicked",
>                              G_CALLBACK(switch_images), target);
>
>     gtk_widget_show_all(window);
>     gtk_main();
>
>     return 0;
> }
>   
> ------------------------------------------------------------------------
>
> #include <gtk/gtk.h>
>
> static void
> switch_images(GtkWidget *button)
> {
>     GtkWidget *image1, *image2;
>
>     image1 = gtk_bin_get_child(GTK_BIN(button));
>     image2 = g_object_get_data(G_OBJECT(button), "other-image");
>     g_print("Current image: %s, switching to %s\n",
>             (const gchar*)g_object_get_data(G_OBJECT(image1), "id"),
>             (const gchar*)g_object_get_data(G_OBJECT(image2), "id"));
>     gtk_container_remove(GTK_CONTAINER(button), image1);
>     gtk_container_add(GTK_CONTAINER(button), image2);
>     g_object_set_data(G_OBJECT(button), "other-image", image1);
>     g_print("New image realized: %d, mapped: %d, visible: %d\n",
>             GTK_WIDGET_REALIZED(image2),
>             GTK_WIDGET_MAPPED(image2),
>             GTK_WIDGET_VISIBLE(image2));
> }
>
> int
> main(int argc, char *argv[])
> {
>     GtkWidget *window, *target, *switcher, *vbox, *image1, *image2;
>
>     gtk_init(&argc, &argv);
>     window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
>     g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
>
>     vbox = gtk_vbox_new(FALSE, 0);
>     gtk_container_add(GTK_CONTAINER(window), vbox);
>
>     image1 = gtk_image_new_from_stock(GTK_STOCK_YES, GTK_ICON_SIZE_BUTTON);
>     g_object_set_data(G_OBJECT(image1), "id", "Yes");
>     gtk_widget_show(image1);
>     g_object_ref(image1);
>
>     image2 = gtk_image_new_from_stock(GTK_STOCK_NO, GTK_ICON_SIZE_BUTTON);
>     g_object_set_data(G_OBJECT(image2), "id", "No");
>     gtk_widget_show(image2);
>     g_object_ref(image2);
>
>     target = gtk_button_new();
>     gtk_container_add(GTK_CONTAINER(target), image1);
>     g_object_set_data(G_OBJECT(target), "other-image", image2);
>     gtk_box_pack_start(GTK_BOX(vbox), target, FALSE, FALSE, 0);
>
>     switcher = gtk_button_new_with_label("Switch");
>     gtk_box_pack_start(GTK_BOX(vbox), switcher, FALSE, FALSE, 0);
>     g_signal_connect_swapped(switcher, "clicked",
>                              G_CALLBACK(switch_images), target);
>
>     gtk_widget_show_all(window);
>     gtk_main();
>
>     return 0;
> }
>   
> ------------------------------------------------------------------------
>
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