nux-0.9.46

Nux/FunctionGraph.h

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00001 /*
00002  * Copyright 2010 Inalogic® Inc.
00003  *
00004  * This program is free software: you can redistribute it and/or modify it
00005  * under the terms of the GNU Lesser General Public License, as
00006  * published by the  Free Software Foundation; either version 2.1 or 3.0
00007  * of the License.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranties of
00011  * MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
00012  * PURPOSE.  See the applicable version of the GNU Lesser General Public
00013  * License for more details.
00014  *
00015  * You should have received a copy of both the GNU Lesser General Public
00016  * License along with this program. If not, see <http://www.gnu.org/licenses/>
00017  *
00018  * Authored by: Jay Taoko <jaytaoko@inalogic.com>
00019  *
00020  */
00021 
00022 
00023 #ifndef FUNCTIONGRAPH_H
00024 #define FUNCTIONGRAPH_H
00025 
00026 #include "NuxGraphics/GpuDevice.h"
00027 #include "NuxGraphics/GLDeviceObjects.h"
00028 #include "NuxGraphics/GLSh_DrawFunction.h"
00029 
00030 namespace nux
00031 {
00032 
00033   typedef float (*FunctionCallback) (float);
00034 
00035   class FunctionGraph : public View
00036   {
00037   public:
00038     FunctionGraph (NUX_FILE_LINE_PROTO);
00039     ~FunctionGraph();
00040     virtual long ProcessEvent (IEvent &ievent, long TraverseInfo, long ProcessEventInfo);
00041     virtual void Draw (GraphicsEngine &GfxContext, bool force_draw);
00042     virtual void DrawContent (GraphicsEngine &GfxContext, bool force_draw);
00043     virtual void PostDraw (GraphicsEngine &GfxContext, bool force_draw);
00044 
00045     void SetXAxisBounds (float minX, float maxX);
00046     void SetYAxisBounds (float minY, float maxY);
00047     void SetFunctionCallback (FunctionCallback f);
00048     float EvalFunction (float x);
00049     void UpdateGraph();
00050 
00051   protected:
00052     void InitializeWidgets();
00053     void InitializeLayout();
00054     void DestroyLayout();
00055 
00056   private:
00057     float m_minX, m_minY, m_maxX, m_maxY;
00058     FunctionCallback m_FunctionCallback;
00059 
00060     ObjectPtr<IOpenGLBaseTexture> Texture;
00061     TextureLayer *m_BackgroundLayer;
00062     GLSh_DrawFunction *m_DrawFunctionShader;
00063   };
00064 
00065 
00066 }
00067 
00068 #endif // FUNCTIONGRAPH_H