Gtk treeview cell- to capture double-click event

Hello,
I can be regarded as a beginner in programming. In my GTK+3 application, I intent to use the tree’s one of the column as a color indicator for list of graphical plots. The thread Gtk treeview cell color change is very helpful in that regard. I intended to make the color change to column more dynamic by using the cell-double click event. But the only event I could find in the GtkCellRenderer is the ‘editing-started’ and ‘edited’ event. What I did was use the ‘editing-started’ cb-function and generate a ‘editing-done’ signal using ‘gtk_cell_editable_editing_done’ and use the code in ‘edited’ callback function to generate a ’ GtkColorChooserDialog’. Using the color got to change the background of the cell. But there is an error “gtk_cell_area_activate_cell: assertion ‘GTK_IS_CELL_EDITABLE (editable_widget)’ failed”. I believe I am missing some sequence of events in the ‘editing-started’ callback. It will be nice if someone can show me the right track. The code follows:

// g_signal_connect(renderer2, "editing-started", G_CALLBACK(on_color_edit_begin), NULL);
 
void on_color_edit_begin (GtkCellRenderer *renderer,GtkCellEditable *editable,
        	char *path, gpointer user_data) {
    gtk_cell_editable_editing_done (editable);
}

//    g_signal_connect(renderer2, "edited", G_CALLBACK(on_color_edit_done), tree);

void on_color_edit_done (GtkCellRendererText *renderer, gchar *path, gchar *new_text, GtkWidget *tree) {
		    GtkTreeIter iter;
		    GValue value=G_VALUE_INIT;
		    g_value_init(&value, G_TYPE_STRING);
		    GtkTreeModel *store=gtk_tree_view_get_model(GTK_TREE_VIEW(tree));
		    g_value_set_static_string(&value, "rgba(255,0,0,1)");
		    GtkTreePath *tree_path=gtk_tree_path_new_from_string(path);
		    gtk_tree_model_get_iter(GTK_TREE_MODEL(store), &iter, tree_path);
		    gtk_list_store_set_value(GTK_LIST_STORE(store), &iter, 3, &value);
		    gtk_tree_path_free(tree_path);
		    g_value_unset(&value);
}

Thanks

1 Like

Got it!!
No need to go for the CellRenderer signal. It can be done using “Row Activated” signal, with the ‘activate-on-single-click’ set to FALSE (for activating double-click event). The cell column data is also supplied in the ‘Row Activated’ callback function.

//    g_signal_connect(tree, "row-activated", G_CALLBACK(edit_tree_column_color), tree);

void edit_tree_column_color (GtkTreeView *tree_view,GtkTreePath *path,GtkTreeViewColumn *column, gpointer user_data) {

		    GtkTreeIter iter;
		    GValue value=G_VALUE_INIT;
		    g_value_init(&value, G_TYPE_STRING);
		    GtkTreeModel *store=gtk_tree_view_get_model(GTK_TREE_VIEW(tree_view));
		    g_value_set_static_string(&value, "rgba(255,0,0,1)");
		    if (strcmp(gtk_tree_view_column_get_title(column),"Program")==0) {
		    gtk_tree_model_get_iter(GTK_TREE_MODEL(store), &iter, path);
		    gtk_list_store_set_value(GTK_LIST_STORE(store), &iter, 3, &value);
		    }
		    g_value_unset(&value);
}

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