include/wx/generic/headerctrlg.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/generic/headerctrlg.h
   3 // Purpose:     Generic wxHeaderCtrl implementation
   4 // Author:      Vadim Zeitlin
   5 // Created:     2008-12-01
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef _WX_GENERIC_HEADERCTRLG_H_
  12 #define _WX_GENERIC_HEADERCTRLG_H_
  13
  14 #include "wx/event.h"
  15 #include "wx/vector.h"
  16 #include "wx/overlay.h"
  17
  18 // ----------------------------------------------------------------------------
  19 // wxHeaderCtrl
  20 // ----------------------------------------------------------------------------
  21
  22 class WXDLLIMPEXP_CORE wxHeaderCtrl : public wxHeaderCtrlBase
  23 {
  24 public:
  25     wxHeaderCtrl()
  26     {
  27         Init();
  28     }
  29
  30     wxHeaderCtrl(wxWindow *parent,
  31                  wxWindowID id = wxID_ANY,
  32                  const wxPoint& pos = wxDefaultPosition,
  33                  const wxSize& size = wxDefaultSize,
  34                  long style = wxHD_DEFAULT_STYLE,
  35                  const wxString& name = wxHeaderCtrlNameStr)
  36     {
  37         Init();
  38
  39         Create(parent, id, pos, size, style, name);
  40     }
  41
  42     bool Create(wxWindow *parent,
  43                 wxWindowID id = wxID_ANY,
  44                 const wxPoint& pos = wxDefaultPosition,
  45                 const wxSize& size = wxDefaultSize,
  46                 long style = wxHD_DEFAULT_STYLE,
  47                 const wxString& name = wxHeaderCtrlNameStr);
  48
  49     virtual ~wxHeaderCtrl();
  50
  51 private:
  52     // implement base class pure virtuals
  53     virtual void DoSetCount(unsigned int count);
  54     virtual unsigned int DoGetCount() const;
  55     virtual void DoUpdate(unsigned int idx);
  56
  57     virtual void DoScrollHorz(int dx);
  58
  59     // override wxWindow methods which must be implemented by a new control
  60     virtual wxSize DoGetBestSize() const;
  61
  62     // common part of all ctors
  63     void Init();
  64
  65     // event handlers
  66     void OnPaint(wxPaintEvent& event);
  67     void OnMouse(wxMouseEvent& event);
  68     void OnKeyDown(wxKeyEvent& event);
  69     void OnCaptureLost(wxMouseCaptureLostEvent& event);
  70
  71     // return the horizontal start position of the given column in physical
  72     // coordinates
  73     int GetColStart(unsigned int idx) const;
  74
  75     // refresh the given column [only]; idx must be valid
  76     void RefreshCol(unsigned int idx);
  77
  78     // refresh the given column if idx is valid
  79     void RefreshColIfNotNone(unsigned int idx);
  80
  81     // refresh all the controls starting from (and including) the given one
  82     void RefreshColsAfter(unsigned int idx);
  83
  84     // return the column at the given position or -1 if it is beyond the
  85     // rightmost column and put true into onSeparator output parameter if the
  86     // position is near the divider at the right end of this column (notice
  87     // that this means that we return column 0 even if the position is over
  88     // column 1 but close enough to the divider separating it from column 0)
  89     int FindColumnAtPos(int x, bool& onSeparator) const;
  90
  91     // return true if a drag resizing operation is currently in progress
  92     bool IsResizing() const;
  93
  94     // end any drag operation currently in progress (resizing or reordering)
  95     void EndDragging();
  96
  97     // start (if m_colBeingResized is -1) or continue resizing the column
  98     //
  99     // this generates wxEVT_COMMAND_HEADER_BEGIN_RESIZE/RESIZING events and can
 100     // cancel the operation if the user handler decides so
 101     void StartOrContinueResizing(unsigned int col, int xPhysical);
 102
 103     // end the resizing operation currently in progress and generate an event
 104     // about it with its cancelled flag set if xPhysical is -1
 105     void EndResizing(int xPhysical);
 106
 107     // constrain the given position to be larger than the start position of the
 108     // given column plus its minimal width and return the effective width
 109     int ConstrainByMinWidth(unsigned int col, int& xPhysical);
 110
 111     // update the current position of the resizing marker if xPhysical is a
 112     // valid physical coordinate value or remove it entirely if it is -1
 113     void UpdateResizingMarker(int xPhysical);
 114
 115
 116     // number of columns in the control currently
 117     unsigned int m_numColumns;
 118
 119     // index of the column under mouse or -1 if none
 120     unsigned int m_hover;
 121
 122     // the column being resized or -1 if there is no resizing operation in
 123     // progress
 124     unsigned int m_colBeingResized;
 125
 126     // the horizontal scroll offset
 127     int m_scrollOffset;
 128
 129     // the overlay display used during the dragging operations
 130     wxOverlay m_overlay;
 131
 132
 133     DECLARE_EVENT_TABLE()
 134     DECLARE_NO_COPY_CLASS(wxHeaderCtrl)
 135 };
 136
 137 #endif // _WX_GENERIC_HEADERCTRLG_H_
 138