include/wx/generic/scrolwin.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        scrolwin.h
   3 // Purpose:     wxScrolledWindow class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef __SCROLWINH_G__
  13 #define __SCROLWINH_G__
  14
  15 #ifdef __GNUG__
  16 #pragma interface "scrolwin.h"
  17 #endif
  18
  19 #include "wx/window.h"
  20
  21 WXDLLEXPORT_DATA(extern const wxChar*) wxPanelNameStr;
  22
  23 class WXDLLEXPORT wxScrolledWindow: public wxWindow
  24 {
  25   DECLARE_ABSTRACT_CLASS(wxScrolledWindow)
  26
  27 public:
  28   wxScrolledWindow(void);
  29   inline wxScrolledWindow(wxWindow *parent, wxWindowID id = -1,
  30            const wxPoint& pos = wxDefaultPosition,
  31            const wxSize& size = wxDefaultSize,
  32            long style = wxHSCROLL|wxVSCROLL,
  33            const wxString& name = wxPanelNameStr)
  34   {
  35       Create(parent, id, pos, size, style, name);
  36   }
  37
  38   inline ~wxScrolledWindow(void) {}
  39
  40   bool Create(wxWindow *parent, wxWindowID id,
  41            const wxPoint& pos = wxDefaultPosition,
  42            const wxSize& size = wxDefaultSize,
  43            long style = wxHSCROLL|wxVSCROLL,
  44            const wxString& name = wxPanelNameStr);
  45
  46   // Set client size
  47   // Should take account of scrollbars
  48 //  virtual void SetClientSize(int width, int size);
  49
  50   // Is the window retained?
  51 //  inline bool IsRetained(void) const;
  52
  53   // Number of pixels per user unit (0 or -1 for no scrollbar)
  54   // Length of virtual canvas in user units
  55   // Length of page in user units
  56   virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
  57                              int noUnitsX, int noUnitsY,
  58                              int xPos = 0, int yPos = 0,
  59                              bool noRefresh = FALSE );
  60
  61   // Physically scroll the window
  62   virtual void Scroll(int x_pos, int y_pos);
  63
  64 #if WXWIN_COMPATIBILITY
  65   virtual void GetScrollUnitsPerPage(int *x_page, int *y_page) const;
  66 #endif
  67
  68   int GetScrollPageSize(int orient) const ;
  69   void SetScrollPageSize(int orient, int pageSize);
  70
  71   virtual void GetScrollPixelsPerUnit(int *x_unit, int *y_unit) const;
  72   // Enable/disable Windows scrolling in either direction.
  73   // If TRUE, wxWindows scrolls the canvas and only a bit of
  74   // the canvas is invalidated; no Clear() is necessary.
  75   // If FALSE, the whole canvas is invalidated and a Clear() is
  76   // necessary. Disable for when the scroll increment is used
  77   // to actually scroll a non-constant distance
  78   virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
  79
  80   // Get the view start
  81   virtual void ViewStart(int *x, int *y) const;
  82
  83   // Actual size in pixels when scrolling is taken into account
  84   virtual void GetVirtualSize(int *x, int *y) const;
  85
  86   // Set the scale factor, used in PrepareDC
  87   inline void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }
  88   inline double GetScaleX() const { return m_scaleX; }
  89   inline double GetScaleY() const { return m_scaleY; }
  90
  91   virtual void CalcScrolledPosition(int x, int y, int *xx, int *yy) const ;
  92   virtual void CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const ;
  93
  94   // Adjust the scrollbars
  95   virtual void AdjustScrollbars(void);
  96
  97   void OnScroll(wxScrollEvent& event);
  98   void OnSize(wxSizeEvent& event);
  99   void OnPaint(wxPaintEvent& event);
 100
 101   // Override this function to draw the graphic.
 102   virtual void OnDraw(wxDC& WXUNUSED(dc)) {};
 103
 104   // Override this function if you don't want to have wxScrolledWindow
 105   // automatically change the origin according to the scroll position.
 106   virtual void PrepareDC(wxDC& dc);
 107
 108 public:
 109   ////////////////////////////////////////////////////////////////////////
 110   //// IMPLEMENTATION
 111
 112   // Calculate scroll increment
 113   virtual int CalcScrollInc(wxScrollEvent& event);
 114
 115   ////////////////////////////////////////////////////////////////////////
 116   //// PROTECTED DATA
 117 protected:
 118   int                   m_xScrollPixelsPerLine;
 119   int                   m_yScrollPixelsPerLine;
 120   bool                  m_xScrollingEnabled;
 121   bool                  m_yScrollingEnabled;
 122   int                   m_xScrollPosition;
 123   int                   m_yScrollPosition;
 124   int                   m_xScrollLines;
 125   int                   m_yScrollLines;
 126   int                   m_xScrollLinesPerPage;
 127   int                   m_yScrollLinesPerPage;
 128   double                m_scaleX;
 129   double                m_scaleY;
 130
 131 DECLARE_EVENT_TABLE()
 132 };
 133
 134 ////////////////////////////////////////////////////////////////////////
 135 //// INLINES
 136
 137 #endif
 138     // __SCROLWINH_G__