include/wx/scrolwin.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        include/wx/scrolwin.h
   3 // Purpose:     wxScrolledWindow, wxScrolledControl and wxScrollHelper
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     30.08.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_SCROLWIN_H_BASE_
  13 #define _WX_SCROLWIN_H_BASE_
  14
  15 #include "wx/window.h"
  16
  17 class WXDLLEXPORT wxScrollHelperEvtHandler;
  18 class WXDLLEXPORT wxTimer;
  19
  20 // ----------------------------------------------------------------------------
  21 // wxScrollHelper: this class implements the scrolling logic which is used by
  22 // wxScrolledWindow and wxScrolledControl. It is a mix-in: just derive from it
  23 // to implement scrolling in your class.
  24 // ----------------------------------------------------------------------------
  25 #if !defined(__WXGTK__) || defined(__WXUNIVERSAL__)
  26
  27 class WXDLLEXPORT wxScrollHelper
  28 {
  29 public:
  30     // ctor and dtor
  31     wxScrollHelper(wxWindow *winToScroll = (wxWindow *)NULL);
  32     void SetWindow(wxWindow *winToScroll);
  33     virtual ~wxScrollHelper();
  34
  35     // configure the scrolling
  36     virtual void SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,
  37                                int noUnitsX, int noUnitsY,
  38                                int xPos = 0, int yPos = 0,
  39                                bool noRefresh = false );
  40
  41     // scroll to the given (in logical coords) position
  42     virtual void Scroll(int x, int y);
  43
  44     // get/set the page size for this orientation (wxVERTICAL/wxHORIZONTAL)
  45     int GetScrollPageSize(int orient) const;
  46     void SetScrollPageSize(int orient, int pageSize);
  47
  48     // Set the x, y scrolling increments.
  49     void SetScrollRate( int xstep, int ystep );
  50
  51     // get the size of one logical unit in physical ones
  52     virtual void GetScrollPixelsPerUnit(int *pixelsPerUnitX,
  53                                         int *pixelsPerUnitY) const;
  54
  55     // Enable/disable Windows scrolling in either direction. If true, wxWidgets
  56     // scrolls the canvas and only a bit of the canvas is invalidated; no
  57     // Clear() is necessary. If false, the whole canvas is invalidated and a
  58     // Clear() is necessary. Disable for when the scroll increment is used to
  59     // actually scroll a non-constant distance
  60     virtual void EnableScrolling(bool x_scrolling, bool y_scrolling);
  61
  62     // Get the view start
  63     virtual void GetViewStart(int *x, int *y) const;
  64
  65     // Set the scale factor, used in PrepareDC
  66     void SetScale(double xs, double ys) { m_scaleX = xs; m_scaleY = ys; }
  67     double GetScaleX() const { return m_scaleX; }
  68     double GetScaleY() const { return m_scaleY; }
  69
  70     // translate between scrolled and unscrolled coordinates
  71     void CalcScrolledPosition(int x, int y, int *xx, int *yy) const
  72         {  DoCalcScrolledPosition(x, y, xx, yy); }
  73     wxPoint CalcScrolledPosition(const wxPoint& pt) const
  74     {
  75         wxPoint p2;
  76         DoCalcScrolledPosition(pt.x, pt.y, &p2.x, &p2.y);
  77         return p2;
  78     }
  79
  80     void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
  81         {  DoCalcUnscrolledPosition(x, y, xx, yy); }
  82     wxPoint CalcUnscrolledPosition(const wxPoint& pt) const
  83     {
  84         wxPoint p2;
  85         DoCalcUnscrolledPosition(pt.x, pt.y, &p2.x, &p2.y);
  86         return p2;
  87     }
  88
  89     virtual void DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const;
  90     virtual void DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
  91
  92     // Adjust the scrollbars
  93     virtual void AdjustScrollbars(void);
  94
  95     // Calculate scroll increment
  96     virtual int CalcScrollInc(wxScrollWinEvent& event);
  97
  98     // Normally the wxScrolledWindow will scroll itself, but in some rare
  99     // occasions you might want it to scroll [part of] another window (e.g. a
 100     // child of it in order to scroll only a portion the area between the
 101     // scrollbars (spreadsheet: only cell area will move).
 102     virtual void SetTargetWindow(wxWindow *target);
 103     virtual wxWindow *GetTargetWindow() const;
 104
 105     void SetTargetRect(const wxRect& rect) { m_rectToScroll = rect; }
 106     wxRect GetTargetRect() const { return m_rectToScroll; }
 107
 108     // Override this function to draw the graphic (or just process EVT_PAINT)
 109     virtual void OnDraw(wxDC& WXUNUSED(dc)) { }
 110
 111     // change the DC origin according to the scroll position.
 112     virtual void DoPrepareDC(wxDC& dc);
 113
 114     // are we generating the autoscroll events?
 115     bool IsAutoScrolling() const { return m_timerAutoScroll != NULL; }
 116
 117     // stop generating the scroll events when mouse is held outside the window
 118     void StopAutoScrolling();
 119
 120     // this method can be overridden in a derived class to forbid sending the
 121     // auto scroll events - note that unlike StopAutoScrolling() it doesn't
 122     // stop the timer, so it will be called repeatedly and will typically
 123     // return different values depending on the current mouse position
 124     //
 125     // the base class version just returns true
 126     virtual bool SendAutoScrollEvents(wxScrollWinEvent& event) const;
 127
 128     // the methods to be called from the window event handlers
 129     void HandleOnScroll(wxScrollWinEvent& event);
 130     void HandleOnSize(wxSizeEvent& event);
 131     void HandleOnPaint(wxPaintEvent& event);
 132     void HandleOnChar(wxKeyEvent& event);
 133     void HandleOnMouseEnter(wxMouseEvent& event);
 134     void HandleOnMouseLeave(wxMouseEvent& event);
 135 #if wxUSE_MOUSEWHEEL
 136     void HandleOnMouseWheel(wxMouseEvent& event);
 137 #endif // wxUSE_MOUSEWHEEL
 138
 139     // FIXME: this is needed for now for wxPlot compilation, should be removed
 140     //        once it is fixed!
 141     void OnScroll(wxScrollWinEvent& event) { HandleOnScroll(event); }
 142
 143 protected:
 144     // get pointer to our scroll rect if we use it or NULL
 145     const wxRect *GetScrollRect() const
 146     {
 147         return m_rectToScroll.width != 0 ? &m_rectToScroll : NULL;
 148     }
 149
 150     // get the size of the target window
 151     wxSize GetTargetSize() const
 152     {
 153         return m_rectToScroll.width != 0 ? m_rectToScroll.GetSize()
 154                                          : m_targetWindow->GetClientSize();
 155     }
 156
 157     void GetTargetSize(int *w, int *h)
 158     {
 159         wxSize size = GetTargetSize();
 160         if ( w )
 161             *w = size.x;
 162         if ( h )
 163             *h = size.y;
 164     }
 165
 166     // change just the target window (unlike SetWindow which changes m_win as
 167     // well)
 168     void DoSetTargetWindow(wxWindow *target);
 169
 170     // delete the event handler we installed
 171     void DeleteEvtHandler();
 172
 173     double                m_scaleX;
 174     double                m_scaleY;
 175
 176     wxWindow             *m_win,
 177                          *m_targetWindow;
 178
 179     wxRect                m_rectToScroll;
 180
 181     wxTimer              *m_timerAutoScroll;
 182
 183     int                   m_xScrollPixelsPerLine;
 184     int                   m_yScrollPixelsPerLine;
 185     int                   m_xScrollPosition;
 186     int                   m_yScrollPosition;
 187     int                   m_xScrollLines;
 188     int                   m_yScrollLines;
 189     int                   m_xScrollLinesPerPage;
 190     int                   m_yScrollLinesPerPage;
 191
 192     bool                  m_xScrollingEnabled;
 193     bool                  m_yScrollingEnabled;
 194
 195 #if wxUSE_MOUSEWHEEL
 196     int m_wheelRotation;
 197 #endif // wxUSE_MOUSEWHEEL
 198
 199     wxScrollHelperEvtHandler *m_handler;
 200
 201     DECLARE_NO_COPY_CLASS(wxScrollHelper)
 202 };
 203
 204 #endif
 205
 206 // ----------------------------------------------------------------------------
 207 // wxScrolledWindow: a wxWindow which knows how to scroll
 208 // ----------------------------------------------------------------------------
 209
 210 #if defined(__WXGTK__) && !defined(__WXUNIVERSAL__)
 211     #include "wx/gtk/scrolwin.h"
 212 #else // !wxGTK
 213     #include "wx/generic/scrolwin.h"
 214
 215     class WXDLLEXPORT wxScrolledWindow : public wxGenericScrolledWindow
 216     {
 217     public:
 218         wxScrolledWindow() { }
 219         wxScrolledWindow(wxWindow *parent,
 220                          wxWindowID winid = wxID_ANY,
 221                          const wxPoint& pos = wxDefaultPosition,
 222                          const wxSize& size = wxDefaultSize,
 223                          long style = wxScrolledWindowStyle,
 224                          const wxString& name = wxPanelNameStr)
 225             : wxGenericScrolledWindow(parent, winid, pos, size, style, name)
 226         {
 227         }
 228
 229     private:
 230         DECLARE_DYNAMIC_CLASS_NO_COPY(wxScrolledWindow)
 231     };
 232
 233     #define wxSCROLLED_WINDOW_IS_GENERIC 1
 234 #endif
 235
 236 #endif
 237     // _WX_SCROLWIN_H_BASE_
 238