include/wx/gtk/scrolwin.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/gtk/scrolwin.h
   3 // Purpose:     wxScrolledWindow class
   4 // Author:      Robert Roebling
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GTK_SCROLLWIN_H_
  13 #define _WX_GTK_SCROLLWIN_H_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 #ifndef wxScrolledWindowStyle
  30 #define wxScrolledWindowStyle (wxHSCROLL | wxVSCROLL)
  31 #endif
  32
  33 // ----------------------------------------------------------------------------
  34 // wxScrolledWindow
  35 // ----------------------------------------------------------------------------
  36
  37 class WXDLLEXPORT wxScrolledWindow : public wxPanel
  38 {
  39 public:
  40     wxScrolledWindow()
  41         { Init(); }
  42
  43     wxScrolledWindow(wxWindow *parent,
  44                      wxWindowID id = -1,
  45                      const wxPoint& pos = wxDefaultPosition,
  46                      const wxSize& size = wxDefaultSize,
  47                      long style = wxScrolledWindowStyle,
  48                      const wxString& name = wxPanelNameStr)
  49         { Create(parent, id, pos, size, style, name); }
  50
  51     void Init();
  52
  53     bool Create(wxWindow *parent,
  54                 wxWindowID id,
  55                 const wxPoint& pos = wxDefaultPosition,
  56                 const wxSize& size = wxDefaultSize,
  57                 long style = wxScrolledWindowStyle,
  58                 const wxString& name = wxPanelNameStr);
  59
  60     // Normally the wxScrolledWindow will scroll itself, but in
  61     // some rare occasions you might want it to scroll another
  62     // window (e.g. a child of it in order to scroll only a portion
  63     // the area between the scrollbars (spreadsheet: only cell area
  64     // will move).
  65     virtual void SetTargetWindow( wxWindow *target, bool pushEventHandler = FALSE );
  66     virtual wxWindow *GetTargetWindow() const;
  67
  68     // Set the scrolled area of the window.
  69     virtual void DoSetVirtualSize( int x, int y );
  70
  71     // Set the x, y scrolling increments.
  72     void SetScrollRate( int xstep, int ystep );
  73
  74     // Number of pixels per user unit (0 or -1 for no scrollbar)
  75     // Length of virtual canvas in user units
  76     // Length of page in user units
  77     // Default action is to set the virtual size and alter scrollbars
  78     // accordingly.
  79     virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
  80                              int noUnitsX, int noUnitsY,
  81                              int xPos = 0, int yPos = 0,
  82                              bool noRefresh = FALSE );
  83
  84     // Physically scroll the window
  85     virtual void Scroll(int x_pos, int y_pos);
  86
  87     int GetScrollPageSize(int orient) const;
  88     void SetScrollPageSize(int orient, int pageSize);
  89
  90     virtual void GetScrollPixelsPerUnit(int *x_unit, int *y_unit) const;
  91
  92     // Enable/disable Windows scrolling in either direction.
  93     // If TRUE, wxWidgets scrolls the canvas and only a bit of
  94     // the canvas is invalidated; no Clear() is necessary.
  95     // If FALSE, the whole canvas is invalidated and a Clear() is
  96     // necessary. Disable for when the scroll increment is used
  97     // to actually scroll a non-constant distance
  98     virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
  99
 100     // Get the view start
 101     virtual void GetViewStart(int *x, int *y) const;
 102
 103     // translate between scrolled and unscrolled coordinates
 104     void CalcScrolledPosition(int x, int y, int *xx, int *yy) const
 105         {  DoCalcScrolledPosition(x, y, xx, yy); }
 106     wxPoint CalcScrolledPosition(const wxPoint& pt) const
 107     {
 108         wxPoint p2;
 109         DoCalcScrolledPosition(pt.x, pt.y, &p2.x, &p2.y);
 110         return p2;
 111     }
 112
 113     void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
 114         {  DoCalcUnscrolledPosition(x, y, xx, yy); }
 115     wxPoint CalcUnscrolledPosition(const wxPoint& pt) const
 116     {
 117         wxPoint p2;
 118         DoCalcUnscrolledPosition(pt.x, pt.y, &p2.x, &p2.y);
 119         return p2;
 120     }
 121
 122     virtual void DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const;
 123     virtual void DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
 124
 125     // Override this function to draw the graphic (or just process EVT_PAINT)
 126     virtual void OnDraw(wxDC& WXUNUSED(dc)) {}
 127
 128     // Override this function if you don't want to have wxScrolledWindow
 129     // automatically change the origin according to the scroll position.
 130     void PrepareDC(wxDC& dc) { DoPrepareDC(dc); }
 131
 132     // lay out the window and its children
 133     virtual bool Layout();
 134
 135     // Adjust the scrollbars
 136     virtual void AdjustScrollbars();
 137
 138     // Set the scale factor, used in PrepareDC
 139     void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }
 140     double GetScaleX() const { return m_scaleX; }
 141     double GetScaleY() const { return m_scaleY; }
 142
 143     // implementation from now on
 144     void OnScroll(wxScrollWinEvent& event);
 145     void OnSize(wxSizeEvent& event);
 146     void OnPaint(wxPaintEvent& event);
 147     void OnChar(wxKeyEvent& event);
 148
 149     void GtkVScroll( float value, unsigned int scroll_type );
 150     void GtkHScroll( float value, unsigned int scroll_type );
 151     void GtkVConnectEvent();
 152     void GtkHConnectEvent();
 153     void GtkVDisconnectEvent();
 154     void GtkHDisconnectEvent();
 155
 156     // Calculate scroll increment
 157     virtual int CalcScrollInc(wxScrollWinEvent& event);
 158
 159     // Overridden from wxWidgets due callback being static
 160     virtual void SetScrollPos( int orient, int pos, bool refresh = TRUE );
 161
 162 #if WXWIN_COMPATIBILITY_2_2
 163     // Compatibility
 164     void ViewStart(int *x, int *y) const { GetViewStart( x, y ); }
 165 #endif // WXWIN_COMPATIBILITY_2_2
 166
 167     virtual void DoPrepareDC(wxDC& dc);
 168
 169 protected:
 170     wxWindow             *m_targetWindow;
 171     int                   m_xScrollPixelsPerLine;
 172     int                   m_yScrollPixelsPerLine;
 173     bool                  m_xScrollingEnabled;
 174     bool                  m_yScrollingEnabled;
 175
 176     // FIXME: these next four members are duplicated in the GtkAdjustment
 177     //        members of wxWindow.  Can they be safely removed from here?
 178
 179     int                   m_xScrollPosition;
 180     int                   m_yScrollPosition;
 181     int                   m_xScrollLinesPerPage;
 182     int                   m_yScrollLinesPerPage;
 183
 184     double                m_scaleY,m_scaleX;
 185
 186 private:
 187     DECLARE_EVENT_TABLE()
 188     DECLARE_ABSTRACT_CLASS(wxScrolledWindow)
 189 };
 190
 191 #endif
 192     // _WX_GTK_SCROLLWIN_H_
 193
 194 // vi:sts=4:sw=4:et