Add paging of large data files

Loading a large (100,000+ entry) data file can take a very long
time, and is quite annoying to wait for. This patch breaks the
data up into pages (10,000 rows per page). Then it lets the user
move about the pages with a scroll button.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 41 insertions, 18 deletions

diff --git a/trace-view-store.h b/trace-view-store.h
index 8440888..9dbbb5a 100644
--- a/trace-view-store.h
+++ b/trace-view-store.h
@@ -62,7 +62,10 @@ struct _TraceViewStore
 {
         GObject                 parent; /* this MUST be the first member */
 
-        guint                   num_rows; /* number of rows that we have   */
+        guint                   start_row; /* row to start at */
+        guint                   num_rows; /* number of rows that we have showing   */
+        guint                   visible_rows; /* number of rows defined */
+        guint                   actual_rows; /* size of rows array */
         TraceViewRecord         **rows; /* a dynamically allocated array of pointers to
                                          *   the TraceViewRecord structure for each row    */
 
@@ -78,6 +81,11 @@ struct _TraceViewStore
         TraceViewRecord         **cpu_list;
         gint                    *cpu_items;
 
+        gint                    page;
+        gint                    pages;
+        gint                    rows_per_page;
+        GtkWidget               *spin;
+
         /* filters */
         gint                    all_events; /* set 1 when all events are enabled */
                                                 /* else */
@@ -91,29 +99,15 @@ struct _TraceViewStore
         gint            stamp;  /* Random integer to check whether an iter belongs to our model */
 };
 
-/* helper functions */
-
-static inline gint trace_view_store_get_cpus(TraceViewStore *store)
-{
-        return store->cpus;
-}
-
-static inline guint64 *trace_view_store_get_cpu_mask(TraceViewStore *store)
-{
-        return store->cpu_mask;
-}
-
-static inline gint trace_view_store_get_all_cpus(TraceViewStore *store)
-{
-        return store->all_cpus;
-}
-
 gboolean trace_view_store_cpu_isset(TraceViewStore *store, gint cpu);
 
 void trace_view_store_set_all_cpus(TraceViewStore *store);
 void trace_view_store_set_cpu(TraceViewStore *store, gint cpu);
 void trace_view_store_clear_cpu(TraceViewStore *store, gint cpu);
 
+void trace_view_store_set_spin_button(TraceViewStore *store, GtkWidget *spin);
+
+void trace_view_store_set_page(TraceViewStore *store, gint page);
 
 /* TraceViewStoreClass: more boilerplate GObject stuff */
 
@@ -127,10 +121,39 @@ GType		trace_view_store_get_type (void);
 
 TraceViewStore  *trace_view_store_new (struct tracecmd_input *handle);
 
+#define TRACE_VIEW_DEFAULT_MAX_ROWS 10000
+
 #if 0
 void            trace_view_store_append_record (TraceViewStore   *trace_view_store,
                                                 const gchar  *name,
                                                 guint         year_born);
 #endif
 
+
+/* helper functions */
+
+static inline gint trace_view_store_get_cpus(TraceViewStore *store)
+{
+        g_return_val_if_fail (TRACE_VIEW_IS_LIST (store), -1);
+        return store->cpus;
+}
+
+static inline guint64 *trace_view_store_get_cpu_mask(TraceViewStore *store)
+{
+        g_return_val_if_fail (TRACE_VIEW_IS_LIST (store), NULL);
+        return store->cpu_mask;
+}
+
+static inline gint trace_view_store_get_all_cpus(TraceViewStore *store)
+{
+        g_return_val_if_fail (TRACE_VIEW_IS_LIST (store), -1);
+        return store->all_cpus;
+}
+
+static inline gint trace_view_store_get_page(TraceViewStore *store)
+{
+        g_return_val_if_fail (TRACE_VIEW_IS_LIST (store), -1);
+        return store->page;
+}
+
 #endif /* _trace_view_store_h_included_ */