Start re-organizing demos so the physics setup can be shared easier (explicit create graphics objects, init/exit physics etc)

Add B3G_RETURN key code, only implemented in Windows so far (todo: Mac, Linux)
Fix Windows key management (use WM_CHAR event instead of WM_KEYUP
Add Return (OnKeyReturn) key support TreeNode, so we can select an item using the return key.

btgui/Gwen/Controls/Button.h

@@ -49,17 +49,28 @@ namespace Gwen
 				virtual void SetImage( const TextObject& strName, bool bCenter = false );
 
 				// You can use this to trigger OnPress directly from other controls using GWEN_CALL_EX
-				virtual void ReceiveEventPress( Base* /*pControl*/ ){ OnPress(); }
+				virtual void ReceiveEventPress( Base* /*pControl*/ )
+				{ 
+					OnPress(); 
+				}
 
 				virtual void SizeToContents();
 				virtual void Layout( Skin::Base* pSkin );
 
+				virtual bool OnKeyReturn(bool bDown)
+				{
+					onKeyboardReturn.Call(this);
+					return true;
+				}
+	
 			public:
 
 				Gwen::Event::Caller	onPress;
 				Gwen::Event::Caller	onDown;
 				Gwen::Event::Caller	onUp;
 				Gwen::Event::Caller	onDoubleClick;
+				Gwen::Event::Caller	onKeyboardReturn;
+
 				Gwen::Event::Caller	onToggle;
 				Gwen::Event::Caller	onToggleOn;
 				Gwen::Event::Caller	onToggleOff;

btgui/Gwen/Controls/TreeControl.cpp

@@ -72,8 +72,10 @@ void TreeControl::OnNodeAdded( TreeNode* pNode )
 	pNode->onNamePress.Add( this, &TreeControl::OnNodeSelection );
 }
 
+
 void TreeControl::OnNodeSelection( Controls::Base* /*control*/ )
 {
+	//printf("TreeControl::OnNodeSelection\n");
 	if ( !m_bAllowMultipleSelection || !Gwen::Input::IsKeyDown( Key::Control ) )
 		DeselectAll();
 }

btgui/Gwen/Controls/TreeNode.cpp

@@ -132,6 +132,13 @@ void TreeNode::PostLayout( Skin::Base* /*skin*/ )
 void TreeNode::SetText( const UnicodeString& text ){ m_Title->SetText( text ); };
 void TreeNode::SetText( const String& text ){ m_Title->SetText( text ); };
 
+UnicodeString TreeNode::GetText() const
+{
+	UnicodeString bla = m_Title->GetText();
+	return bla;
+}
+
+
 void TreeNode::Open()
 {
 	m_InnerPanel->Show();

btgui/Gwen/Controls/TreeNode.h

@@ -38,6 +38,7 @@ namespace Gwen
 
 				virtual void SetText( const UnicodeString& text );
 				virtual void SetText( const String& text );
+				UnicodeString GetText() const;
 
 				virtual void Open();
 				virtual void Close();
@@ -60,7 +61,18 @@ namespace Gwen
 				virtual void DeselectAll();
 
 				virtual void iterate(int action, int* curIndex, int* resultIndex);
-				
+				virtual bool OnKeyReturn(bool bDown)
+				{
+					static bool prevDown = false;
+					if (!prevDown && bDown)
+					{
+						onReturnKeyDown.Call(this);
+					}
+					prevDown = bDown;
+					return Base::OnKeyReturn(bDown);
+				}
+
+				Event::Caller	onReturnKeyDown;
 
 				Event::Caller	onNamePress;
 				Event::Caller	onSelectChange;