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 #include "wx/panel.h"
  21
  22 WXDLLEXPORT_DATA(extern const wxChar*) wxPanelNameStr;
  23
  24 class WXDLLEXPORT wxScrolledWindow : public wxPanel
  25 {
  26 public:
  27     wxScrolledWindow();
  28     inline wxScrolledWindow(wxWindow *parent, wxWindowID id = -1,
  29            const wxPoint& pos = wxDefaultPosition,
  30            const wxSize& size = wxDefaultSize,
  31            long style = wxHSCROLL|wxVSCROLL,
  32            const wxString& name = wxPanelNameStr)
  33     {
  34       Create(parent, id, pos, size, style, name);
  35     }
  36
  37     ~wxScrolledWindow();
  38
  39     bool Create(wxWindow *parent, wxWindowID id,
  40            const wxPoint& pos = wxDefaultPosition,
  41            const wxSize& size = wxDefaultSize,
  42            long style = wxHSCROLL|wxVSCROLL,
  43            const wxString& name = wxPanelNameStr);
  44
  45     // Normally the wxScrolledWindow will scroll itself, but in
  46     // some rare occasions you might want it to scroll another
  47     // window (e.g. a child of it in order to scroll only a portion
  48     // the area between the scrollbars (spreadsheet: only cell area
  49     // will move).
  50     virtual void SetTargetWindow( wxWindow *target );
  51     virtual wxWindow *GetTargetWindow();
  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     virtual void CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const ;
  67 #endif
  68
  69     int GetScrollPageSize(int orient) const ;
  70     void SetScrollPageSize(int orient, int pageSize);
  71
  72     virtual void GetScrollPixelsPerUnit(int *x_unit, int *y_unit) const;
  73
  74     // Enable/disable Windows scrolling in either direction.
  75     // If TRUE, wxWindows scrolls the canvas and only a bit of
  76     // the canvas is invalidated; no Clear() is necessary.
  77     // If FALSE, the whole canvas is invalidated and a Clear() is
  78     // necessary. Disable for when the scroll increment is used
  79     // to actually scroll a non-constant distance
  80     virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
  81
  82     // Get the view start
  83     virtual void ViewStart(int *x, int *y) const;
  84
  85     // Actual size in pixels when scrolling is taken into account
  86     virtual void GetVirtualSize(int *x, int *y) const;
  87
  88     // Set the scale factor, used in PrepareDC
  89     void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }
  90     double GetScaleX() const { return m_scaleX; }
  91     double GetScaleY() const { return m_scaleY; }
  92
  93     virtual void CalcScrolledPosition(int x, int y, int *xx, int *yy) const ;
  94     virtual void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const ;
  95
  96     // Adjust the scrollbars
  97     virtual void AdjustScrollbars(void);
  98
  99     // Override this function to draw the graphic (or just process EVT_PAINT)
 100     virtual void OnDraw(wxDC& WXUNUSED(dc)) {};
 101
 102     // Override this function if you don't want to have wxScrolledWindow
 103     // automatically change the origin according to the scroll position.
 104     virtual void PrepareDC(wxDC& dc);
 105
 106     // implementation from now on
 107     void OnScroll(wxScrollWinEvent& event);
 108     void OnSize(wxSizeEvent& event);
 109     void OnPaint(wxPaintEvent& event);
 110
 111     // Calculate scroll increment
 112     virtual int CalcScrollInc(wxScrollWinEvent& event);
 113
 114 protected:
 115     wxWindow             *m_targetWindow;
 116     int                   m_xScrollPixelsPerLine;
 117     int                   m_yScrollPixelsPerLine;
 118     bool                  m_xScrollingEnabled;
 119     bool                  m_yScrollingEnabled;
 120     int                   m_xScrollPosition;
 121     int                   m_yScrollPosition;
 122     int                   m_xScrollLines;
 123     int                   m_yScrollLines;
 124     int                   m_xScrollLinesPerPage;
 125     int                   m_yScrollLinesPerPage;
 126     double                m_scaleX;
 127     double                m_scaleY;
 128
 129 private:
 130     DECLARE_EVENT_TABLE()
 131     DECLARE_ABSTRACT_CLASS(wxScrolledWindow)
 132 };
 133
 134 #endif
 135     // __SCROLWINH_G__