diff options
Diffstat (limited to 'src/math-history.c')
| -rw-r--r-- | src/math-history.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/math-history.c b/src/math-history.c index 49d63a2..403a04f 100644 --- a/src/math-history.c +++ b/src/math-history.c @@ -22,6 +22,7 @@ struct MathHistoryPrivate gchar *last_answer; gchar *last_equation; + int current; /* 0 is the first entry, rows-1 the most recent entry */ int rows; GtkWidget *listbox; }; @@ -82,6 +83,7 @@ math_history_insert_entry (MathHistory *history, char *equation, MPNumber *answe history->priv->last_answer = g_strdup(answer_nine_digits); history->priv->last_equation = g_strdup(equation); history->priv->rows++; + history->priv->current = history->priv->rows; g_signal_emit_by_name(history, "row-added"); g_free(answer_four_digits); @@ -94,12 +96,33 @@ math_history_clear(MathHistory *history) GList *children, *iter; history->priv->rows = 0; + history->priv->current = 0; children = gtk_container_get_children(GTK_CONTAINER(history->priv->listbox)); for (iter = children; iter != NULL; iter = g_list_next(iter)) gtk_widget_destroy(GTK_WIDGET(iter->data)); g_list_free(children); } +gpointer +math_history_get_entry_at(MathHistory *history, int index) +{ + if (index >= 0 && index < history->priv->rows) + return MATH_HISTORY_ENTRY(gtk_list_box_get_row_at_index(GTK_LIST_BOX(history->priv->listbox), index)); + return NULL; +} + +void +math_history_set_current(MathHistory *history, int value) +{ + history->priv->current = CLAMP (history->priv->current + value, 0, history->priv->rows - 1); +} + +int +math_history_get_current(MathHistory *history) +{ + return history->priv->current; +} + static void math_history_class_init(MathHistoryClass *klass) { @@ -124,6 +147,7 @@ math_history_init(MathHistory *history) gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(history), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC); gtk_scrolled_window_set_placement(GTK_SCROLLED_WINDOW(history), GTK_CORNER_TOP_LEFT); + history->priv->current = 0; history->priv->rows = 0; history->priv->last_answer = g_strdup(""); history->priv->last_equation = g_strdup(""); |