//-----------------------------------------------------------------------------
// Copyright (c) 2012 GarageGames, LLC
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//-----------------------------------------------------------------------------

#ifndef _GUISHADEREDITOR_H_
#define _GUISHADEREDITOR_H_

#ifndef _GUICONTROL_H_
#include "gui/core/guiControl.h"
#endif
#ifndef _UNDO_H_
#include "util/undo.h"
#endif
#ifndef _GFX_GFXDRAWER_H_
#include "gfx/gfxDrawUtil.h"
#endif

#ifndef _SHADERNODE_H_
#include "gui/shaderEditor/nodes/shaderNode.h"
#endif // !_SHADERNODE_H_

class GuiShaderEditor : public GuiControl
{
public:

   typedef GuiControl Parent;

   enum mouseModes { Selecting, MovingSelection, DragConnection, DragSelecting, DragClone };

protected:

   // list
   typedef Vector<ShaderNode*> ShaderNodeVector;
   // all nodes in this graph.
   ShaderNodeVector mCurrNodes;

   // Undo
   SimGroup* mTrash;
   SimSet* mSelectedSet;

   // mouse interaction
   mouseModes mMouseDownMode;
   Point2I mLastMousePos;
   Point2I mLastDragPos;
   Point2I mSelectionAnchor;
   Point2I mDragBeginPoint;
   Vector<Point2I> mDragBeginPoints;
   bool mDragAddSelection;
   bool mDragMoveUndo;
   ShaderNodeVector mSelectedNodes;

public:
   GuiShaderEditor();

   DECLARE_CONOBJECT(GuiShaderEditor);
   DECLARE_CATEGORY("Shader Editor");
   DECLARE_DESCRIPTION("Implements a shader node based editor.");

   bool onWake();
   void onSleep();
   static void initPersistFields();
   virtual bool onAdd() override;
   virtual void onRemove() override;

   virtual void onPreRender() override;
   virtual void onRender(Point2I offset, const RectI& updateRect) override;

   // interaction
   virtual bool onKeyDown(const GuiEvent& event) override;
   virtual void onMouseDown(const GuiEvent& event) override;
   virtual void onMouseUp(const GuiEvent& event) override;
   virtual void onMouseMove(const GuiEvent& event) override;
   virtual void onMiddleMouseDown(const GuiEvent& event) override;
   virtual bool onMouseWheelUp(const GuiEvent& event) override;
   virtual bool onMouseWheelDown(const GuiEvent& event) override;
};

#endif _GUISHADEREDITOR_H_