xue@0: /*
xue@0:     Harmonic Visualiser
xue@0: 
xue@0:     An audio file viewer and editor.
xue@0:     Centre for Digital Music, Queen Mary, University of London.
xue@0:     This file copyright 2011 Wen Xue.
xue@0: 
xue@0:     This program is free software; you can redistribute it and/or
xue@0:     modify it under the terms of the GNU General Public License as
xue@0:     published by the Free Software Foundation; either version 2 of the
xue@0:     License, or (at your option) any later version. 
xue@0: */
xue@0: //---------------------------------------------------------------------------
xue@0: 
xue@0: #ifndef NavigatorH
xue@0: #define NavigatorH
xue@0: //---------------------------------------------------------------------------
xue@0: /*
xue@0:   Navigator.cpp implements TNavigator, a VCL control for specifying a rectangular
xue@0:   area inside a larger rectangular area. 
xue@0: */
xue@0: #include <SysUtils.hpp>
xue@0: #include <Classes.hpp>
xue@0: #include <Controls.hpp>
xue@0: //---------------------------------------------------------------------------
xue@0: typedef enum {maNoAction, maMove, maSize} TNavigatorMouseAction;
xue@0: typedef enum {htOuter, htLeft, htTopLeft, htTop, htTopRight, htRight, htBottomRight, htBottom, htBottomLeft, htInner} TNavigatorHitTest;
xue@0: 
xue@0: class PACKAGE TNavigator : public TCustomControl
xue@0: {
xue@0: private:
xue@0:   int X0;
xue@0:   int Y0;
xue@0:   int XL;
xue@0:   int YL;
xue@0:   double x01;
xue@0:   double x02;
xue@0:   double y01;
xue@0:   double y02;
xue@0:   int X1;
xue@0:   int X2;
xue@0:   int Y1;
xue@0:   int Y2;
xue@0:   TNavigatorMouseAction FMouseAction;
xue@0:   TNavigatorHitTest FHitTest;
xue@0:   TNotifyEvent FOnAreaChange;
xue@0:   TNotifyEvent FOnBackground;
xue@0: protected:
xue@0:   TNavigatorHitTest HitTest(int X, int Y);
xue@0:   virtual void __fastcall Paint();
xue@0:   DYNAMIC void __fastcall MouseDown(TMouseButton, TShiftState, int, int);
xue@0:   DYNAMIC void __fastcall MouseMove(TShiftState, int, int);
xue@0:   DYNAMIC void __fastcall MouseUp(TMouseButton, TShiftState, int, int);
xue@0: public:
xue@0:   Graphics::TBitmap* BkgBmp;
xue@0: 
xue@0:   double x1;
xue@0:   double x2;
xue@0:   double y1;
xue@0:   double y2;
xue@0: 
xue@0:   TColor AreaColorX;
xue@0:   __property Canvas;
xue@0: 
xue@0: 	__fastcall TNavigator(TComponent* Owner);
xue@0: 	__fastcall ~TNavigator();
xue@0:   void DrawArea();
xue@0:   DYNAMIC void __fastcall Resize();
xue@0:   void SetArea(double, double, double, double);
xue@0: 
xue@0: __published:
xue@0:   __property TNotifyEvent OnAreaChange={read=FOnAreaChange, write=FOnAreaChange};
xue@0:   __property TNotifyEvent OnBackground={read=FOnBackground, write=FOnBackground};
xue@0:   __property PopupMenu;
xue@0: 
xue@0: };
xue@0: //---------------------------------------------------------------------------
xue@0: #endif