include/wx/generic/scrolwin.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/generic/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 _WX_GENERIC_SCROLLWIN_H_
  13 #define _WX_GENERIC_SCROLLWIN_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "scrolwin.h"
  17 #endif
  18
  19 // ----------------------------------------------------------------------------
  20 // headers and constants
  21 // ----------------------------------------------------------------------------
  22
  23 #include "wx/window.h"
  24 #include "wx/panel.h"
  25
  26 WXDLLEXPORT_DATA(extern const wxChar*) wxPanelNameStr;
  27
  28 // default scrolled window style
  29 #define wxScrolledWindowStyle (wxHSCROLL | wxVSCROLL | wxTAB_TRAVERSAL)
  30
  31 // ----------------------------------------------------------------------------
  32 // wxScrolledWindow
  33 // ----------------------------------------------------------------------------
  34
  35 class WXDLLEXPORT wxScrolledWindow : public wxPanel
  36 {
  37 public:
  38     wxScrolledWindow();
  39     wxScrolledWindow(wxWindow *parent,
  40                      wxWindowID id = -1,
  41                      const wxPoint& pos = wxDefaultPosition,
  42                      const wxSize& size = wxDefaultSize,
  43                      long style = wxScrolledWindowStyle,
  44                      const wxString& name = wxPanelNameStr)
  45     {
  46         Create(parent, id, pos, size, style, name);
  47     }
  48
  49     ~wxScrolledWindow();
  50
  51     bool Create(wxWindow *parent,
  52                 wxWindowID id,
  53                 const wxPoint& pos = wxDefaultPosition,
  54                 const wxSize& size = wxDefaultSize,
  55                 long style = wxScrolledWindowStyle,
  56                 const wxString& name = wxPanelNameStr);
  57
  58     // Normally the wxScrolledWindow will scroll itself, but in
  59     // some rare occasions you might want it to scroll another
  60     // window (e.g. a child of it in order to scroll only a portion
  61     // the area between the scrollbars (spreadsheet: only cell area
  62     // will move).
  63     virtual void SetTargetWindow( wxWindow *target );
  64     virtual wxWindow *GetTargetWindow();
  65
  66     // Number of pixels per user unit (0 or -1 for no scrollbar)
  67     // Length of virtual canvas in user units
  68     // Length of page in user units
  69     virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
  70                              int noUnitsX, int noUnitsY,
  71                              int xPos = 0, int yPos = 0,
  72                              bool noRefresh = FALSE );
  73
  74     // Physically scroll the window
  75     virtual void Scroll(int x_pos, int y_pos);
  76
  77 #if WXWIN_COMPATIBILITY
  78     virtual void GetScrollUnitsPerPage(int *x_page, int *y_page) const;
  79     virtual void CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const;
  80 #endif
  81
  82     int GetScrollPageSize(int orient) const;
  83     void SetScrollPageSize(int orient, int pageSize);
  84
  85     virtual void GetScrollPixelsPerUnit(int *x_unit, int *y_unit) const;
  86
  87     // Enable/disable Windows scrolling in either direction.
  88     // If TRUE, wxWindows scrolls the canvas and only a bit of
  89     // the canvas is invalidated; no Clear() is necessary.
  90     // If FALSE, the whole canvas is invalidated and a Clear() is
  91     // necessary. Disable for when the scroll increment is used
  92     // to actually scroll a non-constant distance
  93     virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
  94
  95     // Get the view start
  96     virtual void GetViewStart(int *x, int *y) const;
  97     // Compatibility
  98     void ViewStart(int *x, int *y) const
  99        { GetViewStart( x, y ); }
 100
 101     // Actual size in pixels when scrolling is taken into account
 102     virtual void GetVirtualSize(int *x, int *y) const;
 103
 104     // Set the scale factor, used in PrepareDC
 105     void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }
 106     double GetScaleX() const { return m_scaleX; }
 107     double GetScaleY() const { return m_scaleY; }
 108
 109     virtual void CalcScrolledPosition(int x, int y, int *xx, int *yy) const;
 110     virtual void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
 111
 112     // Adjust the scrollbars
 113     virtual void AdjustScrollbars(void);
 114
 115     // Override this function to draw the graphic (or just process EVT_PAINT)
 116     virtual void OnDraw(wxDC& WXUNUSED(dc)) {};
 117
 118     // Override this function if you don't want to have wxScrolledWindow
 119     // automatically change the origin according to the scroll position.
 120     virtual void PrepareDC(wxDC& dc);
 121
 122     // implementation from now on
 123     void OnScroll(wxScrollWinEvent& event);
 124     void OnSize(wxSizeEvent& event);
 125     void OnPaint(wxPaintEvent& event);
 126
 127     // Calculate scroll increment
 128     virtual int CalcScrollInc(wxScrollWinEvent& event);
 129
 130 protected:
 131     wxWindow             *m_targetWindow;
 132     int                   m_xScrollPixelsPerLine;
 133     int                   m_yScrollPixelsPerLine;
 134     bool                  m_xScrollingEnabled;
 135     bool                  m_yScrollingEnabled;
 136     int                   m_xScrollPosition;
 137     int                   m_yScrollPosition;
 138     int                   m_xScrollLines;
 139     int                   m_yScrollLines;
 140     int                   m_xScrollLinesPerPage;
 141     int                   m_yScrollLinesPerPage;
 142     double                m_scaleX;
 143     double                m_scaleY;
 144
 145 private:
 146     DECLARE_EVENT_TABLE()
 147     DECLARE_ABSTRACT_CLASS(wxScrolledWindow)
 148 };
 149
 150 #endif
 151     // _WX_GENERIC_SCROLLWIN_H_