On Wed, Mar 21, 2007 at 03:01:39PM -0300, Diogo Ramos wrote: > This question is cracking my head off. I am days at it and i can't figure it > out, although I thing a got pretty close. > Here is the deal: > I have a GtkTreeStore that I use to show some values. > This values can be changed. > So, my idea is to store a pointer at a cell so, every time I change the > value of my data, the data is changed at the GtkTreeStore throw the pointer. > I don't know if it's possible, but I am trying, :-) > My last idea was change the GtkCellRendererText using > gtk_tree_view_column_set_cell_data_func so, every time the render is called, > a function of mine would translate a pointer, which is stored in the tree, > to a text. But it didn't work. It wont stop complaining. > Here is the menssage: GLib-GObject-WARNING **: unable to set property `text' > of type `gchararray' from value of type `gpointer' > I think it's because I set G_TYPE_POINTER at the model but the render I am > using is for text, although I change the value when It has to be rendered. If I understand what you are trying to achieve (some code would be a better description), you probably call gtk_tree_view_column_add_attribute(column, renderer, "text", id); *in addition* to setting up a cell data function. In that case don't. It tells the tree view to attempt to set the "text" property itself -- which inevitably fails as it doesn't know how to make a string from a pointer. On the other hand, if `translate' means just type-cast, then you should use a G_TYPE_STRING column directly. Anyway, working code using a G_TYPE_POINTER model column with a cell data function to render text in GtkCellRendererText view columns is attached. Yeti -- http://gwyddion.net/ ============================================================================ #include <gtk/gtk.h> static void render_name(G_GNUC_UNUSED GtkCellLayout *layout, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, G_GNUC_UNUSED gpointer user_data) { GParamSpec *prop; gtk_tree_model_get(model, iter, 0, &prop, -1); g_object_set(renderer, "text", prop->name, NULL); } static void render_value_type(G_GNUC_UNUSED GtkCellLayout *layout, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, G_GNUC_UNUSED gpointer user_data) { GParamSpec *prop; gtk_tree_model_get(model, iter, 0, &prop, -1); g_object_set(renderer, "text", g_type_name(prop->value_type), NULL); } static void render_owner_type(G_GNUC_UNUSED GtkCellLayout *layout, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, G_GNUC_UNUSED gpointer user_data) { GParamSpec *prop; gtk_tree_model_get(model, iter, 0, &prop, -1); g_object_set(renderer, "text", g_type_name(prop->owner_type), NULL); } static void add_column(GtkTreeView *treeview, const gchar *title, GtkCellLayoutDataFunc func, gpointer func_data) { GtkTreeViewColumn *column; GtkCellRenderer *renderer; renderer = gtk_cell_renderer_text_new(); g_object_set(renderer, "family", "Monospace", NULL); column = gtk_tree_view_column_new(); gtk_tree_view_column_set_title(column, title); gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(column), renderer, TRUE); gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(column), renderer, func, func_data, NULL); gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), column); } int main(int argc, char *argv[]) { GtkWidget *window, *treeview, *scwin; GtkListStore *store; GtkTreeIter iter; GParamSpec **props; GObjectClass *klass; GType type; guint i, n; gtk_init(&argc, &argv); type = GTK_TYPE_TREE_VIEW; store = gtk_list_store_new(1, G_TYPE_POINTER); klass = G_OBJECT_CLASS(g_type_class_ref(type)); props = g_object_class_list_properties(klass, &n); for (i = 0; i < n; i++) gtk_list_store_insert_with_values(store, &iter, G_MAXINT, 0, props[i], -1); g_free(props); g_type_class_unref(klass); window = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_window_set_default_size(GTK_WINDOW(window), -1, 400); gtk_window_set_title(GTK_WINDOW(window), g_type_name(type)); g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL); scwin = gtk_scrolled_window_new(NULL, NULL); gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scwin), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC); gtk_container_add(GTK_CONTAINER(window), scwin); treeview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(store)); gtk_container_add(GTK_CONTAINER(scwin), treeview); add_column(GTK_TREE_VIEW(treeview), "Name", render_name, NULL); add_column(GTK_TREE_VIEW(treeview), "Value Type", render_value_type, NULL); add_column(GTK_TREE_VIEW(treeview), "Owner Type", render_owner_type, NULL); gtk_widget_show_all(window); gtk_main(); return 0; } _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
