mgui/ctrlmagnifier.h

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#ifndef  INC_MGUI_CTRL_MAGNIFIER_H
#define  INC_MGUI_CTRL_MAGNIFIER_H

#ifndef INC_MGUI_CANVAS_H
#include <mgui/canvas.h>
#endif

#ifndef INC_MI32_COLOR_H
#include <mi32/color.h>
#endif

#ifndef INC_SPATMOD_IMAGESTAGE_H
#include <spatmod/imagestage.h>
#endif

#ifndef INC_SPATMOD_IMAGESTAGEAUTOPTR_H
#include <spatmod/imagestageautoptr.h>
#endif

namespace MGUI {

//===================================================================================================================
class CTRL_MAGNIFIER : public CANVAS {
   public:

      enum STYLE {
         STYLE_Default =                  0x00,
         STYLE_NoShowCenterCell =         0x01,
         STYLE_NoZoomControls =           0x02,
         STYLE_NoZoomFactor =          0x04
         };

      typedef fastdelegate::FastDelegate<void(double)> DELEGATE_ONZOOM;

      CTRL_MAGNIFIER (
         );

      virtual ~CTRL_MAGNIFIER (
         );

      void Create (
         LAYOUT_PANE_BASE& ParentPane,                   
         INT32 Width,                                 
         INT32 Height,                                
         double MinimumZoomAllowed = 2,                     
         double MaximumZoomAllowed = 16,                    
         LAYOUT_SIZEALIGN sizealign = LAYOUT_SIZEALIGN_Expand, 
         CTRL_MAGNIFIER::STYLE style = STYLE_Default           
         );

      ERRVALUE Draw (
         const MGUI::POINT& point,           
         MGD::DEVICE *Device                 
         );

      ERRVALUE Draw (
         const MGUI::POINT& point,           
         SPATMOD::IMAGE::STAGE* PtrStage,    
         bool TakeOwnership = true           
         );

      ERRVALUE Draw (
         SPATMOD::IMAGE::STAGE* PtrStage,    
         bool TakeOwnership = true           
         );

      void Erase ();

      double GetZoom () const {return (m_zoom); }

      void Redraw ();

      void SetBackgroundColor (
         const COLOR& color
         );

      void SetDelegateOnZoom (
         DELEGATE_ONZOOM delegate
         ) { m_DelegateOnZoom = delegate; }

      void SetZoom (
         double zoom
         );

      void SetZoomLimits (
         double MinimumZoomAllowed,
         double MaximumZoomAllowed
         );

      void SetShowCenter (
         bool bShowCenter
         );

   private:
      #ifndef GENERATING_DOXYGEN_OUTPUT

      double m_zoom;
      double m_MinimumZoomAllowed;
      double m_MaximumZoomAllowed;
      COLOR m_BGColor;
      COLOR m_BorderColor;
      INT32 m_style;

      LRECT2D m_ZoomInRect;
      LRECT2D m_ZoomOutRect;
      LRECT2D m_ZoomTextRect;

      SPATMOD::IMAGE::STAGE_AUTOPTR m_PrevStageAutoPtr;

      void Erase(int width, int height);
      bool OnClick (MGUI::POINT point, MGUI::POINTERBUTTON button, MGUI::KEYSTATE state);
      void OnScrollWheel(INT32 WheelValue);

      DELEGATE_ONZOOM m_DelegateOnZoom;

      CTRL_MAGNIFIER (const CTRL_MAGNIFIER&);
      CTRL_MAGNIFIER& operator= (const CTRL_MAGNIFIER&);

      #endif // GENERATING_DOXYGEN_OUTPUT

   };

#ifndef GENERATING_DOXYGEN_OUTPUT
DEFINE_ENUM_OP_BITWISE(MGUI::CTRL_MAGNIFIER::STYLE)
#endif

//===================================================================================================================

}  // End namespace MGUI


#endif   // INC_MGUI_CTRL_MAGNIFIER_H

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