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Display GVariant in GtkTreeView

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0

I have the challenge to store and later read values from type uint16 in a GtkListStore. This GtkListStore is also used as a model for a GtkTreeView and the uint16 value shall also be displayed as a column.

I've troubleshooted weird behaviour until I found out, the issue is due to passing a guint16 variable to gtk_tree_model_get() which can only be defined as G_TYPE_UINT in the ListStore which is a 32-bit unsigned integer effectively.

However, since I have to rely on the uint16 variable type, I tried to circumvent the issue by wrapping it in a GVariant.

Works so far. The weird behaviour is fixed this way. However, now I have issues to display these values in a TreeView. When starting the application I get the following error message:

GLib-GObject-WARNING **: unable to set property 'text' of type 'gchararray' from value of type 'GVariant'

Here the code how the GtkListStore is defined and filled with the GVariant:

static void set_initial_value(void)

 GtkTreeIter iter;
 GVariant *gv_uint16;

 if (store == NULL) 
 store = gtk_list_store_new(1, G_TYPE_VARIANT);
 

 gv_uint16 = g_variant_new_uint16((guint16)42);

 gtk_list_store_append(store, &iter);
 gtk_list_store_set(store, &iter, 0, gv_uint16, -1);

And here is how the column in the TreeView is defined:

 renderer = gtk_cell_renderer_text_new();
 column = gtk_tree_view_column_new_with_attributes("Number", renderer,
 "text", 0, NULL);

 gtk_tree_view_column_set_sort_column_id(column, 0);
 gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), column);

Does someone have an idea how to display this GVariant value in the TreeView?
Thanks.

c gtk3

share|improve this question

asked Mar 9 at 9:18

AlexAlex

183

add a comment | 

0

I have the challenge to store and later read values from type uint16 in a GtkListStore. This GtkListStore is also used as a model for a GtkTreeView and the uint16 value shall also be displayed as a column.

I've troubleshooted weird behaviour until I found out, the issue is due to passing a guint16 variable to gtk_tree_model_get() which can only be defined as G_TYPE_UINT in the ListStore which is a 32-bit unsigned integer effectively.

However, since I have to rely on the uint16 variable type, I tried to circumvent the issue by wrapping it in a GVariant.

Works so far. The weird behaviour is fixed this way. However, now I have issues to display these values in a TreeView. When starting the application I get the following error message:

GLib-GObject-WARNING **: unable to set property 'text' of type 'gchararray' from value of type 'GVariant'

Here the code how the GtkListStore is defined and filled with the GVariant:

static void set_initial_value(void)

 GtkTreeIter iter;
 GVariant *gv_uint16;

 if (store == NULL) 
 store = gtk_list_store_new(1, G_TYPE_VARIANT);
 

 gv_uint16 = g_variant_new_uint16((guint16)42);

 gtk_list_store_append(store, &iter);
 gtk_list_store_set(store, &iter, 0, gv_uint16, -1);

And here is how the column in the TreeView is defined:

 renderer = gtk_cell_renderer_text_new();
 column = gtk_tree_view_column_new_with_attributes("Number", renderer,
 "text", 0, NULL);

 gtk_tree_view_column_set_sort_column_id(column, 0);
 gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), column);

Does someone have an idea how to display this GVariant value in the TreeView?
Thanks.

c gtk3

share|improve this question

asked Mar 9 at 9:18

AlexAlex

183

add a comment | 

I have the challenge to store and later read values from type uint16 in a GtkListStore. This GtkListStore is also used as a model for a GtkTreeView and the uint16 value shall also be displayed as a column.

I've troubleshooted weird behaviour until I found out, the issue is due to passing a guint16 variable to gtk_tree_model_get() which can only be defined as G_TYPE_UINT in the ListStore which is a 32-bit unsigned integer effectively.

However, since I have to rely on the uint16 variable type, I tried to circumvent the issue by wrapping it in a GVariant.

Works so far. The weird behaviour is fixed this way. However, now I have issues to display these values in a TreeView. When starting the application I get the following error message:

GLib-GObject-WARNING **: unable to set property 'text' of type 'gchararray' from value of type 'GVariant'

Here the code how the GtkListStore is defined and filled with the GVariant:

static void set_initial_value(void)

 GtkTreeIter iter;
 GVariant *gv_uint16;

 if (store == NULL) 
 store = gtk_list_store_new(1, G_TYPE_VARIANT);
 

 gv_uint16 = g_variant_new_uint16((guint16)42);

 gtk_list_store_append(store, &iter);
 gtk_list_store_set(store, &iter, 0, gv_uint16, -1);

And here is how the column in the TreeView is defined:

 renderer = gtk_cell_renderer_text_new();
 column = gtk_tree_view_column_new_with_attributes("Number", renderer,
 "text", 0, NULL);

 gtk_tree_view_column_set_sort_column_id(column, 0);
 gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), column);

Does someone have an idea how to display this GVariant value in the TreeView?
Thanks.

c gtk3

share|improve this question

asked Mar 9 at 9:18

AlexAlex

183

static void set_initial_value(void)

 GtkTreeIter iter;
 GVariant *gv_uint16;

 if (store == NULL) 
 store = gtk_list_store_new(1, G_TYPE_VARIANT);
 

 gv_uint16 = g_variant_new_uint16((guint16)42);

 gtk_list_store_append(store, &iter);
 gtk_list_store_set(store, &iter, 0, gv_uint16, -1);

 renderer = gtk_cell_renderer_text_new();
 column = gtk_tree_view_column_new_with_attributes("Number", renderer,
 "text", 0, NULL);

 gtk_tree_view_column_set_sort_column_id(column, 0);
 gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), column);

share|improve this question

asked Mar 9 at 9:18

AlexAlex

183

share|improve this question

asked Mar 9 at 9:18

AlexAlex

183

asked Mar 9 at 9:18

AlexAlex

183

asked Mar 9 at 9:18

AlexAlex

183