From abacf1bd3b939c79c31cf8fb619e8f1130fc0ceb Mon Sep 17 00:00:00 2001
From: Rene Gollent <anevilyak@gmail.com>
Date: Tue, 28 Jun 2011 00:20:32 +0000
Subject: [PATCH] * Extend ValueNode to be able to indicate that a node needs
 child creation   requests delayed until its location/value have been
 resolved. Update   VariablesView to make use of that flag.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42333 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 .../user_interface/gui/team_window/VariablesView.cpp | 12 ++++++++++++
 src/apps/debugger/value/ValueNode.h                  |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp b/src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp
index ee47f921b6..4ac7c0e863 100644
--- a/src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp
+++ b/src/apps/debugger/user_interface/gui/team_window/VariablesView.cpp
@@ -853,6 +853,13 @@ VariablesView::VariableTableModel::ValueNodeValueChanged(ValueNode* valueNode)
 	if (modelNode == NULL)
 		return;
 
+	if (valueNode->ChildCreationNeedsValue()
+		&& !valueNode->ChildrenCreated()) {
+		status_t error = valueNode->CreateChildren();
+		if (error != B_OK)
+			return;
+	}
+
 	// check whether the value actually changed
 	Value* value = valueNode->GetValue();
 	if (value == modelNode->GetValue())
@@ -1115,6 +1122,11 @@ VariablesView::VariableTableModel::_AddChildNodes(ValueNodeChild* nodeChild)
 		valueNode = nodeChild->Node();
 	}
 
+	// check if this node requires child creation
+	// to be deferred until after its location/value have been resolved
+	if (valueNode->ChildCreationNeedsValue())
+		return B_OK;
+
 	// create the children, if not done yet
 	if (valueNode->ChildrenCreated())
 		return B_OK;
diff --git a/src/apps/debugger/value/ValueNode.h b/src/apps/debugger/value/ValueNode.h
index 13c78872f4..449aba779d 100644
--- a/src/apps/debugger/value/ValueNode.h
+++ b/src/apps/debugger/value/ValueNode.h
@@ -47,6 +47,8 @@ public:
 									{ return fContainer; }
 			void				SetContainer(ValueNodeContainer* container);
 
+			virtual bool		ChildCreationNeedsValue() const
+									{ return false; }
 			bool				ChildrenCreated() const
 									{ return fChildrenCreated; }
 	virtual	status_t			CreateChildren() = 0;