perf scripts python: call-graph-from-sql.py: Factor out CallGraphModel from TreeModel

Factor out CallGraphModel from TreeModel, which paves the way to reuse
TreeModel in future reports.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20181001062853.28285-10-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 61 insertions, 29 deletions

diff --git a/tools/perf/scripts/python/call-graph-from-sql.py b/tools/perf/scripts/python/call-graph-from-sql.py
index 65c18e351bc4..ada486048ad8 100644
--- a/tools/perf/scripts/python/call-graph-from-sql.py
+++ b/tools/perf/scripts/python/call-graph-from-sql.py
@@ -201,42 +201,47 @@ class TreeItem():
                         self.selectCalls()
                 return self.child_count
 
-        def columnCount(self):
-                return 7
-
-        def columnHeader(self, column):
-                headers = ["Call Path", "Object", "Count ", "Time (ns) ", "Time (%) ", "Branch Count ", "Branch Count (%) "]
-                return headers[column]
+        def hasChildren(self):
+                if not self.query_done:
+                        return True
+                return self.child_count > 0
 
         def getData(self, column):
                 return self.data[column]
 
+# Tree data model
+
 class TreeModel(QAbstractItemModel):
 
-        def __init__(self, db, parent=None):
+        def __init__(self, root, parent=None):
                 super(TreeModel, self).__init__(parent)
-                self.db = db
-                self.root = TreeItem(db, 0, None)
+                self.root = root
+                self.last_row_read = 0
 
-        def columnCount(self, parent):
-                return self.root.columnCount()
-
-        def rowCount(self, parent):
+        def Item(self, parent):
                 if parent.isValid():
-                        parent_item = parent.internalPointer()
+                        return parent.internalPointer()
                 else:
-                        parent_item = self.root
-                return parent_item.childCount()
+                        return self.root
+
+        def rowCount(self, parent):
+                result = self.Item(parent).childCount()
+                if result < 0:
+                        result = 0
+                        self.dataChanged.emit(parent, parent)
+                return result
+
+        def hasChildren(self, parent):
+                return self.Item(parent).hasChildren()
 
         def headerData(self, section, orientation, role):
                 if role == Qt.TextAlignmentRole:
-                        if section > 1:
-                                return Qt.AlignRight
+                        return self.columnAlignment(section)
                 if role != Qt.DisplayRole:
                         return None
                 if orientation != Qt.Horizontal:
                         return None
-                return self.root.columnHeader(section)
+                return self.columnHeader(section)
 
         def parent(self, child):
                 child_item = child.internalPointer()
@@ -246,21 +251,48 @@ class TreeModel(QAbstractItemModel):
                 return self.createIndex(parent_item.getRow(), 0, parent_item)
 
         def index(self, row, column, parent):
-                if parent.isValid():
-                        parent_item = parent.internalPointer()
-                else:
-                        parent_item = self.root
-                child_item = parent_item.getChildItem(row)
+                child_item = self.Item(parent).getChildItem(row)
                 return self.createIndex(row, column, child_item)
 
+        def DisplayData(self, item, index):
+                return item.getData(index.column())
+
+        def columnAlignment(self, column):
+                return Qt.AlignLeft
+
+        def columnFont(self, column):
+                return None
+
         def data(self, index, role):
                 if role == Qt.TextAlignmentRole:
-                        if index.column() > 1:
-                                return Qt.AlignRight
+                        return self.columnAlignment(index.column())
+                if role == Qt.FontRole:
+                        return self.columnFont(index.column())
                 if role != Qt.DisplayRole:
                         return None
-                index_item = index.internalPointer()
-                return index_item.getData(index.column())
+                item = index.internalPointer()
+                return self.DisplayData(item, index)
+
+# Context-sensitive call graph data model
+
+class CallGraphModel(TreeModel):
+
+        def __init__(self, glb, parent=None):
+                super(CallGraphModel, self).__init__(TreeItem(glb.db, 0, None), parent)
+                self.glb = glb
+
+        def columnCount(self, parent=None):
+                return 7
+
+        def columnHeader(self, column):
+                headers = ["Call Path", "Object", "Count ", "Time (ns) ", "Time (%) ", "Branch Count ", "Branch Count (%) "]
+                return headers[column]
+
+        def columnAlignment(self, column):
+                alignment = [ Qt.AlignLeft, Qt.AlignLeft, Qt.AlignRight, Qt.AlignRight, Qt.AlignRight, Qt.AlignRight, Qt.AlignRight ]
+                return alignment[column]
+
+# Main window
 
 class MainWindow(QMainWindow):
 
@@ -275,7 +307,7 @@ class MainWindow(QMainWindow):
                 self.setWindowIcon(self.style().standardIcon(QStyle.SP_ComputerIcon))
                 self.setMinimumSize(200, 100)
 
-                self.model = TreeModel(glb.db)
+                self.model = CallGraphModel(glb)
 
                 self.view = QTreeView()
                 self.view.setModel(self.model)