Remove NotifyNodesCleared() again.

- For various reasons this one can be error prone, since it relies on
the model being able to provide the correct row count, which won't be
the case if the subclass calls it after having already removed all its
nodes.

- Optimize Table's RowsRemoved() similarly to TreeTable's for the remove
all rows case.

src/apps/debuganalyzer/gui/table/Table.cpp

@@ -124,17 +124,6 @@ TableModel::NotifyRowsChanged(int32 rowIndex, int32 count)
 }
 
 
-void
-TableModel::NotifyRowsCleared()
-{
-	int32 listenerCount = fListeners.CountItems();
-	for (int32 i = listenerCount - 1; i >= 0; i--) {
-		TableModelListener* listener = fListeners.ItemAt(i);
-		listener->TableRowsRemoved(this, 0, CountRows());
-	}
-}
-
-
 void
 TableModel::NotifyTableModelReset()
 {
@@ -644,6 +633,12 @@ Table::TableRowsAdded(TableModel* model, int32 rowIndex, int32 count)
 void
 Table::TableRowsRemoved(TableModel* model, int32 rowIndex, int32 count)
 {
+	if (rowIndex == 0 && count == fRows.CountItems()) {
+		fRows.MakeEmpty();
+		Clear();
+		return;
+	}
+
 	for (int32 i = rowIndex + count - 1; i >= rowIndex; i--) {
 		if (BRow* row = fRows.RemoveItemAt(i)) {
 			RemoveRow(row);

src/apps/debuganalyzer/gui/table/Table.h

@@ -52,7 +52,6 @@ protected:
 			void				NotifyRowsAdded(int32 rowIndex, int32 count);
 			void				NotifyRowsRemoved(int32 rowIndex, int32 count);
 			void				NotifyRowsChanged(int32 rowIndex, int32 count);
-			void				NotifyRowsCleared();
 			void				NotifyTableModelReset();
 
 protected:

src/apps/debuganalyzer/gui/table/TreeTable.cpp

@@ -233,18 +233,6 @@ TreeTableModel::NotifyNodesChanged(const TreeTablePath& path, int32 childIndex,
 }
 
 
-void
-TreeTableModel::NotifyNodesCleared()
-{
-	int32 listenerCount = fListeners.CountItems();
-	for (int32 i = listenerCount - 1; i >= 0; i--) {
-		TreeTableModelListener* listener = fListeners.ItemAt(i);
-		listener->TableNodesRemoved(this, TreeTablePath(), 0,
-			CountChildren(Root()));
-	}
-}
-
-
 void
 TreeTableModel::NotifyTableModelReset()
 {

src/apps/debuganalyzer/gui/table/TreeTable.h

@@ -94,7 +94,6 @@ protected:
 									int32 childIndex, int32 count);
 			void				NotifyNodesChanged(const TreeTablePath& path,
 									int32 childIndex, int32 count);
-			void				NotifyNodesCleared();
 			void				NotifyTableModelReset();
 
 protected: