TraceView: Center traces vertically after view creation

[pulseview.git] / pv / view / tracetreeitemowner.cpp

diff --git a/pv/view/tracetreeitemowner.cpp b/pv/view/tracetreeitemowner.cpp
index 24174794456d01ffb2fd05cbf27601cdc1e16334..b570c0386c3ef556e4e9cd41927749e212fcb5b6 100644 (file)
--- a/pv/view/tracetreeitemowner.cpp
+++ b/pv/view/tracetreeitemowner.cpp
@@ -14,8 +14,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <cassert>
@@ -35,7 +34,8 @@ using std::static_pointer_cast;
 using std::vector;
 
 namespace pv {
-namespace view {
+namespace views {
+namespace TraceView {
 
 const ViewItemOwner::item_list& TraceTreeItemOwner::child_items() const
 {
@@ -87,13 +87,16 @@ void TraceTreeItemOwner::remove_child_item(std::shared_ptr<TraceTreeItem> item)
 
 pair<int, int> TraceTreeItemOwner::v_extents() const
 {
-       pair<int, int> extents(INT_MAX, INT_MIN);
+       bool has_children = false;
 
+       pair<int, int> extents(INT_MAX, INT_MIN);
        for (const shared_ptr<TraceTreeItem> t : trace_tree_child_items()) {
                assert(t);
                if (!t->enabled())
                        continue;
 
+               has_children = true;
+
                const int child_offset = t->layout_v_offset();
                const pair<int, int> child_extents = t->v_extents();
                extents.first = min(child_extents.first + child_offset,
@@ -102,6 +105,9 @@ pair<int, int> TraceTreeItemOwner::v_extents() const
                        extents.second);
        }
 
+       if (!has_children)
+               extents = make_pair(0, 0);
+
        return extents;
 }
 
@@ -126,5 +132,6 @@ void TraceTreeItemOwner::restack_items()
 {
 }
 
-} // view
-} // pv
+} // namespace TraceView
+} // namespace views
+} // namespace pv