shader editor ground work

Adds the ground work for shader editor
Adds the base gui for the shader editor

Engine/source/gui/shaderEditor/guiShaderEditor.h

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+//-----------------------------------------------------------------------------
+// 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_