First of all: Thank you very much for your reply. It was essential forme to understand what was going on. And you were right about the "putsome code" part. I am too inexperienced yet.Ok, let's go:
It took me all theses days to understand it and I am quite sure I didn'tget it all.One point that took me most of my time was this thing that I considereda flaw: When we assume that one attribute of a model will beG_TYPE_POINTER and we want to store there a string pointer, we don'tpass a "&pointer", but just a "pointer". It is a little confusing to mebecause I assume that POINTERS are address and address are passed using& key. But maybe (or for sure) my understanding of it is wrong.Now, I can change my pointers values and the values at the tree_view isupdated. I did not implement yet the change_row signed, but I sure will.Just one thing still bothers me: I noticed that every time I pass mymouse pointer throw the row, the cells renderer functions are called. Isthis right or I made something wrong? Everything is working ok, but I ama little concerned about performance.
Here is my code:PS: I am sorry about the names of my variables, but I am developing codefor my country mates, so It needed to mean something at my language,which is portuguese.
/*Where I create my tree*/enum{ SEMESTRE, ANO, CODIGO, NOME, NUM_COLUNAS_DADOS};
GtkWidget *sc_arvore_dados = NULL;GtkTreeStore *armazena = NULL;GtkWidget *arvore_dados = NULL;
/*arvore_dados***************************************************************/
armazena = gtk_tree_store_new( NUM_COLUNAS_DADOS, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER );
sc_arvore_dados = gtk_scrolled_window_new( NULL, NULL ); gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(sc_arvore_dados), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC); arvore_dados = gtk_tree_view_new_with_model (GTK_TREE_MODEL (armazena)); gtk_container_add( GTK_CONTAINER( sc_arvore_dados ), arvore_dados );
/*Here I used your idea of adding columns. I had my own *function which would create a entire tree at once *but it was very bloated and your idea is much *elegant that my was*/ add_coluna( GTK_TREE_VIEW( arvore_dados ), "Semestre",renderiza_semestre, NULL ); add_coluna( GTK_TREE_VIEW( arvore_dados ), "Ano", renderiza_ano, NULL ); add_coluna( GTK_TREE_VIEW( arvore_dados ), "Codigo", renderiza_codigo,NULL ); add_coluna( GTK_TREE_VIEW( arvore_dados ), "Nome", renderiza_nome, NULL );
gtk_widget_show( arvore_dados ); gtk_widget_show( sc_arvore_dados ); /**************************************************************************/
/*Here is the add_coluna function, which is your add_column function*/static voidadd_coluna(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);}
/*And here are the cell data functions*/static voidrenderiza_semestre(G_GNUC_UNUSED GtkCellLayout *layout, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, G_GNUC_UNUSED gpointer user_data){ gchar *str = ( gchar* ) g_malloc( sizeof( gchar ) * 10 ); gint *num = NULL; gtk_tree_model_get(model, iter, SEMESTRE, &num, -1); if( !num ) return; g_snprintf( str, 10, "%d", *num ); g_object_set(renderer, "text", str, NULL);}
static voidrenderiza_ano(G_GNUC_UNUSED GtkCellLayout *layout, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, G_GNUC_UNUSED gpointer user_data){ gchar *str = ( gchar* ) g_malloc( sizeof( gchar ) * 10 ); gint *num = NULL; gtk_tree_model_get(model, iter, ANO, &num, -1); if( !num ) return; g_snprintf( str, 10, "%d", *num ); g_object_set(renderer, "text", str, NULL);}
static voidrenderiza_codigo(G_GNUC_UNUSED GtkCellLayout *layout, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, G_GNUC_UNUSED gpointer user_data){ gchar *str = NULL; gtk_tree_model_get(model, iter, CODIGO, &str, -1); if( !str ) g_object_set(renderer, "text", "", NULL); g_object_set(renderer, "text", str, NULL);}
static voidrenderiza_nome(G_GNUC_UNUSED GtkCellLayout *layout, GtkCellRenderer *renderer, GtkTreeModel *model, GtkTreeIter *iter, G_GNUC_UNUSED gpointer user_data){ gchar *str = NULL; gtk_tree_model_get(model, iter, NOME, &str, -1); if( !str ) g_object_set(renderer, "text", "", NULL); g_object_set(renderer, "text", str, NULL);}
So, thats it.Again, thank you very much for your reply.
David Nečas (Yeti) escreveu:> 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/-- Diogo F. S. Ramos_______________________________________________gtk-list mailing listgtk-list@xxxxxxxxxxxxx://mail.gnome.org/mailman/listinfo/gtk-list
