From 916c9bf9199bb2d72923bb696823ca9b129d0621 Mon Sep 17 00:00:00 2001
From: dfighter1985 <devnull@localhost>
Date: Mon, 21 Apr 2014 19:30:33 +0200
Subject: [PATCH] We can now drag elements, they will disappear and whatnot,
 but at least they can be dragged!

---
 code/nel/include/nel/gui/interface_element.h |  3 +
 code/nel/include/nel/gui/interface_group.h   |  3 +
 code/nel/include/nel/gui/widget_manager.h    |  5 ++
 code/nel/src/gui/interface_group.cpp         | 26 ++++++++
 code/nel/src/gui/widget_manager.cpp          | 63 ++++++++++++++++++--
 5 files changed, 96 insertions(+), 4 deletions(-)

diff --git a/code/nel/include/nel/gui/interface_element.h b/code/nel/include/nel/gui/interface_element.h
index 764d165ef..db7a499c8 100644
--- a/code/nel/include/nel/gui/interface_element.h
+++ b/code/nel/include/nel/gui/interface_element.h
@@ -233,6 +233,9 @@ namespace NLGUI
 
 		virtual void setActive (bool state);
 
+		void setXReal( sint32 x ){ _XReal = x; }
+		void setYReal( sint32 y ){ _YReal = y; }
+
 		void setX (sint32 x) { _X = x; }
 		void setXAndInvalidateCoords (sint32 x) { _X = x; invalidateCoords(); }
 
diff --git a/code/nel/include/nel/gui/interface_group.h b/code/nel/include/nel/gui/interface_group.h
index f72bc6f1f..ff0efac3b 100644
--- a/code/nel/include/nel/gui/interface_group.h
+++ b/code/nel/include/nel/gui/interface_group.h
@@ -79,6 +79,9 @@ namespace NLGUI
 		bool delElement (const std::string &id, bool noWarning=false);
 		bool delElement (CInterfaceElement *pIE, bool noWarning=false);
 
+		// Take the element from the group, but don't delete it!
+		CInterfaceElement* takeElement( CInterfaceElement *e );
+
 		uint getNumGroup() const { return (uint)_ChildrenGroups.size(); }
 		CInterfaceGroup *getGroup(uint index) const;
 
diff --git a/code/nel/include/nel/gui/widget_manager.h b/code/nel/include/nel/gui/widget_manager.h
index 6d4f47164..5d2468e7a 100644
--- a/code/nel/include/nel/gui/widget_manager.h
+++ b/code/nel/include/nel/gui/widget_manager.h
@@ -532,6 +532,11 @@ namespace NLGUI
 
 		NLMISC::CRefPtr< CViewBase > _CapturedView;
 
+		NLMISC::CRefPtr< CInterfaceElement > draggedElement;
+
+		bool startDragging();
+		void stopDragging();
+
 		// What is under pointer
 		std::vector< CViewBase* > _ViewsUnderPointer;
 		std::vector< CCtrlBase* > _CtrlsUnderPointer;
diff --git a/code/nel/src/gui/interface_group.cpp b/code/nel/src/gui/interface_group.cpp
index 5fa83e1c5..4d37eda1c 100644
--- a/code/nel/src/gui/interface_group.cpp
+++ b/code/nel/src/gui/interface_group.cpp
@@ -1638,6 +1638,32 @@ namespace NLGUI
 		return delView(static_cast<CViewBase*>(pIE));
 	}
 
+	// ------------------------------------------------------------------------------------------------
+	CInterfaceElement* CInterfaceGroup::takeElement( CInterfaceElement *e )
+	{
+		bool ok = false;
+
+		if( e->isGroup() )
+		{
+			ok = delGroup( static_cast< CInterfaceGroup* >( e ), true );
+		}
+		else
+		if( e->isCtrl() )
+		{
+			ok = delCtrl( static_cast< CCtrlBase* >( e ), true );
+		}
+		else
+		if( e->isView() )
+		{
+			ok = delView( static_cast< CViewBase* >( e ), true );
+		}
+
+		if( ok )
+			return e;
+		else
+			return NULL;
+	}
+
 	// ------------------------------------------------------------------------------------------------
 	bool CInterfaceGroup::isWindowUnder (sint32 x, sint32 y)
 	{
diff --git a/code/nel/src/gui/widget_manager.cpp b/code/nel/src/gui/widget_manager.cpp
index 2c3f1159e..e3f1064fa 100644
--- a/code/nel/src/gui/widget_manager.cpp
+++ b/code/nel/src/gui/widget_manager.cpp
@@ -2039,6 +2039,12 @@ namespace NLGUI
 						}
 					}
 
+					if( draggedElement != NULL )
+					{
+						CInterfaceElement *e = draggedElement;
+						static_cast< CViewBase* >( e )->draw();
+					}
+
 					if ( (nPriority == WIN_PRIORITY_WORLD_SPACE) && !camera.empty())
 					{
 						driver->setMatrixMode2D11();
@@ -2437,11 +2443,11 @@ namespace NLGUI
 					// consider clicking on a control implies handling of the event.
 					handled= true;
 
-					// handle the capture
 					if( getCapturePointerLeft() != NULL )
-						getCapturePointerLeft()->handleEvent(evnt);
-					else
-						_CapturedView->handleEvent( evnt );
+						_CapturedView = getCapturePointerLeft();
+
+					// handle the capture
+					_CapturedView->handleEvent( evnt );
 				}
 			}
 
@@ -2534,6 +2540,11 @@ namespace NLGUI
 					setCapturePointerLeft(NULL);
 					handled = true;
 				}
+
+				_CapturedView = NULL;
+				
+				if( CInterfaceElement::getEditorMode() )
+					stopDragging();
 			}
 
 
@@ -2602,8 +2613,52 @@ namespace NLGUI
 			ve.setY( getPointer()->getY() );
 		}
 
+		if( CInterfaceElement::getEditorMode() )
+		{
+			if( ( _CapturedView != NULL ) && ( draggedElement == NULL ) )
+			{
+				startDragging();
+			}
+			else
+			if( draggedElement != NULL )
+			{
+				draggedElement->setXReal( newX );
+				draggedElement->setYReal( newY );
+				draggedElement->invalidateCoords();
+			}
+		}
+
 		return true;
 	}
+
+	// ------------------------------------------------------------------------------------------------
+	bool CWidgetManager::startDragging()
+	{
+		CInterfaceElement *e = NULL;
+
+		CInterfaceGroup *g = _CapturedView->getParent();
+		if( g != NULL )
+		{
+			e = g->takeElement( _CapturedView );
+			if( e == NULL )
+			{
+				nlinfo( "Something went horribly wrong :(" );
+				return false;
+			}
+		}
+		else
+			e = _CapturedView;
+
+		e->setParent( NULL );
+		draggedElement = e;
+
+		return true;
+	}
+
+	void CWidgetManager::stopDragging()
+	{
+		draggedElement = NULL;
+	}
 	
 	// ------------------------------------------------------------------------------------------------
 	void CWidgetManager::movePointer (sint32 dx, sint32 dy)