interface/scrolbar.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        scrolbar.h
   3 // Purpose:     interface of wxScrollBar
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxScrollBar
  11     @wxheader{scrolbar.h}
  12
  13     A wxScrollBar is a control that represents a horizontal or
  14     vertical scrollbar. It is distinct from the two scrollbars that some windows
  15     provide automatically, but the two types of scrollbar share the way
  16     events are received.
  17
  18     @beginStyleTable
  19     @style{wxSB_HORIZONTAL}:
  20            Specifies a horizontal scrollbar.
  21     @style{wxSB_VERTICAL}:
  22            Specifies a vertical scrollbar.
  23     @endStyleTable
  24
  25     @library{wxcore}
  26     @category{ctrl}
  27     @appearance{scrollbar.png}
  28
  29     @see @ref overview_scrollingoverview "Scrolling overview", @ref
  30     overview_eventhandlingoverview, wxScrolledWindow
  31 */
  32 class wxScrollBar : public wxControl
  33 {
  34 public:
  35     //@{
  36     /**
  37         Constructor, creating and showing a scrollbar.
  38
  39         @param parent
  40             Parent window. Must be non-@NULL.
  41         @param id
  42             Window identifier. The value wxID_ANY indicates a default value.
  43         @param pos
  44             Window position. If wxDefaultPosition is specified then a default
  45         position is chosen.
  46         @param size
  47             Window size. If wxDefaultSize is specified then a default size
  48         is chosen.
  49         @param style
  50             Window style. See wxScrollBar.
  51         @param validator
  52             Window validator.
  53         @param name
  54             Window name.
  55
  56         @see Create(), wxValidator
  57     */
  58     wxScrollBar();
  59     wxScrollBar(wxWindow* parent, wxWindowID id,
  60                 const wxPoint& pos = wxDefaultPosition,
  61                 const wxSize& size = wxDefaultSize,
  62                 long style = wxSB_HORIZONTAL,
  63                 const wxValidator& validator = wxDefaultValidator,
  64                 const wxString& name = "scrollBar");
  65     //@}
  66
  67     /**
  68         Destructor, destroying the scrollbar.
  69     */
  70     ~wxScrollBar();
  71
  72     /**
  73         Scrollbar creation function called by the scrollbar constructor.
  74         See wxScrollBar() for details.
  75     */
  76     bool Create(wxWindow* parent, wxWindowID id,
  77                 const wxPoint& pos = wxDefaultPosition,
  78                 const wxSize& size = wxDefaultSize,
  79                 long style = wxSB_HORIZONTAL,
  80                 const wxValidator& validator = wxDefaultValidator,
  81                 const wxString& name = "scrollBar");
  82
  83     /**
  84         Returns the page size of the scrollbar. This is the number of scroll units
  85         that will be scrolled when the user pages up or down. Often it is the
  86         same as the thumb size.
  87
  88         @see SetScrollbar()
  89     */
  90     int GetPageSize() const;
  91
  92     /**
  93         Returns the length of the scrollbar.
  94
  95         @see SetScrollbar()
  96     */
  97     int GetRange() const;
  98
  99     /**
 100         Returns the current position of the scrollbar thumb.
 101
 102         @see SetThumbPosition()
 103     */
 104     int GetThumbPosition() const;
 105
 106     /**
 107         Returns the thumb or 'view' size.
 108
 109         @see SetScrollbar()
 110     */
 111     int GetThumbSize() const;
 112
 113     /**
 114         Sets the scrollbar properties.
 115
 116         @param position
 117             The position of the scrollbar in scroll units.
 118         @param thumbSize
 119             The size of the thumb, or visible portion of the scrollbar, in scroll units.
 120         @param range
 121             The maximum position of the scrollbar.
 122         @param pageSize
 123             The size of the page size in scroll units. This is the number of units
 124             the scrollbar will scroll when it is paged up or down. Often it is the same
 125         as
 126             the thumb size.
 127         @param refresh
 128             @true to redraw the scrollbar, @false otherwise.
 129
 130         @remarks Let's say you wish to display 50 lines of text, using the same
 131                  font. The window is sized so that you can only see 16
 132                  lines at a time.
 133     */
 134     virtual void SetScrollbar(int position, int thumbSize, int range,
 135                               int pageSize,
 136                               bool refresh = true);
 137
 138     /**
 139         Sets the position of the scrollbar.
 140
 141         @param viewStart
 142             The position of the scrollbar thumb.
 143
 144         @see GetThumbPosition()
 145     */
 146     void SetThumbPosition(int viewStart);
 147 };
 148