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 // Copyright:   (c) 2008 Vadim Zeitlin <vadim@wxwidgets.org>
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_GENERIC_HEADERCTRLG_H_
  11 #define _WX_GENERIC_HEADERCTRLG_H_
  12
  13 #include "wx/event.h"
  14 #include "wx/vector.h"
  15 #include "wx/overlay.h"
  16
  17 // ----------------------------------------------------------------------------
  18 // wxHeaderCtrl
  19 // ----------------------------------------------------------------------------
  20
  21 class WXDLLIMPEXP_CORE wxHeaderCtrl : public wxHeaderCtrlBase
  22 {
  23 public:
  24     wxHeaderCtrl()
  25     {
  26         Init();
  27     }
  28
  29     wxHeaderCtrl(wxWindow *parent,
  30                  wxWindowID id = wxID_ANY,
  31                  const wxPoint& pos = wxDefaultPosition,
  32                  const wxSize& size = wxDefaultSize,
  33                  long style = wxHD_DEFAULT_STYLE,
  34                  const wxString& name = wxHeaderCtrlNameStr)
  35     {
  36         Init();
  37
  38         Create(parent, id, pos, size, style, name);
  39     }
  40
  41     bool Create(wxWindow *parent,
  42                 wxWindowID id = wxID_ANY,
  43                 const wxPoint& pos = wxDefaultPosition,
  44                 const wxSize& size = wxDefaultSize,
  45                 long style = wxHD_DEFAULT_STYLE,
  46                 const wxString& name = wxHeaderCtrlNameStr);
  47
  48     virtual ~wxHeaderCtrl();
  49
  50 protected:
  51     virtual wxSize DoGetBestSize() const;
  52
  53
  54 private:
  55     // implement base class pure virtuals
  56     virtual void DoSetCount(unsigned int count);
  57     virtual unsigned int DoGetCount() const;
  58     virtual void DoUpdate(unsigned int idx);
  59
  60     virtual void DoScrollHorz(int dx);
  61
  62     virtual void DoSetColumnsOrder(const wxArrayInt& order);
  63     virtual wxArrayInt DoGetColumnsOrder() const;
  64
  65     // common part of all ctors
  66     void Init();
  67
  68     // event handlers
  69     void OnPaint(wxPaintEvent& event);
  70     void OnMouse(wxMouseEvent& event);
  71     void OnKeyDown(wxKeyEvent& event);
  72     void OnCaptureLost(wxMouseCaptureLostEvent& event);
  73
  74     // move the column with given idx at given position (this doesn't generate
  75     // any events but does refresh the display)
  76     void DoMoveCol(unsigned int idx, unsigned int pos);
  77
  78     // return the horizontal start position of the given column in physical
  79     // coordinates
  80     int GetColStart(unsigned int idx) const;
  81
  82     // and the end position
  83     int GetColEnd(unsigned int idx) const;
  84
  85     // refresh the given column [only]; idx must be valid
  86     void RefreshCol(unsigned int idx);
  87
  88     // refresh the given column if idx is valid
  89     void RefreshColIfNotNone(unsigned int idx);
  90
  91     // refresh all the controls starting from (and including) the given one
  92     void RefreshColsAfter(unsigned int idx);
  93
  94     // return the column at the given position or -1 if it is beyond the
  95     // rightmost column and put true into onSeparator output parameter if the
  96     // position is near the divider at the right end of this column (notice
  97     // that this means that we return column 0 even if the position is over
  98     // column 1 but close enough to the divider separating it from column 0)
  99     unsigned int FindColumnAtPoint(int x, bool *onSeparator = NULL) const;
 100
 101     // return true if a drag resizing operation is currently in progress
 102     bool IsResizing() const;
 103
 104     // return true if a drag reordering operation is currently in progress
 105     bool IsReordering() const;
 106
 107     // return true if any drag operation is currently in progress
 108     bool IsDragging() const { return IsResizing() || IsReordering(); }
 109
 110     // end any drag operation currently in progress (resizing or reordering)
 111     void EndDragging();
 112
 113     // cancel the drag operation currently in progress and generate an event
 114     // about it
 115     void CancelDragging();
 116
 117     // start (if m_colBeingResized is -1) or continue resizing the column
 118     //
 119     // this generates wxEVT_HEADER_BEGIN_RESIZE/RESIZING events and can
 120     // cancel the operation if the user handler decides so
 121     void StartOrContinueResizing(unsigned int col, int xPhysical);
 122
 123     // end the resizing operation currently in progress and generate an event
 124     // about it with its cancelled flag set if xPhysical is -1
 125     void EndResizing(int xPhysical);
 126
 127     // same functions as above but for column moving/reordering instead of
 128     // resizing
 129     void StartReordering(unsigned int col, int xPhysical);
 130
 131     // returns true if we did drag the column somewhere else or false if we
 132     // didn't really move it -- in this case we consider that no reordering
 133     // took place and that a normal column click event should be generated
 134     bool EndReordering(int xPhysical);
 135
 136     // constrain the given position to be larger than the start position of the
 137     // given column plus its minimal width and return the effective width
 138     int ConstrainByMinWidth(unsigned int col, int& xPhysical);
 139
 140     // update the information displayed while a column is being moved around
 141     void UpdateReorderingMarker(int xPhysical);
 142
 143     // clear any overlaid markers
 144     void ClearMarkers();
 145
 146
 147     // number of columns in the control currently
 148     unsigned int m_numColumns;
 149
 150     // index of the column under mouse or -1 if none
 151     unsigned int m_hover;
 152
 153     // the column being resized or -1 if there is no resizing operation in
 154     // progress
 155     unsigned int m_colBeingResized;
 156
 157     // the column being moved or -1 if there is no reordering operation in
 158     // progress
 159     unsigned int m_colBeingReordered;
 160
 161     // the distance from the start of m_colBeingReordered and the mouse
 162     // position when the user started to drag it
 163     int m_dragOffset;
 164
 165     // the horizontal scroll offset
 166     int m_scrollOffset;
 167
 168     // the overlay display used during the dragging operations
 169     wxOverlay m_overlay;
 170
 171     // the indices of the column appearing at the given position on the display
 172     // (its size is always m_numColumns)
 173     wxArrayInt m_colIndices;
 174
 175
 176     DECLARE_EVENT_TABLE()
 177     wxDECLARE_NO_COPY_CLASS(wxHeaderCtrl);
 178 };
 179
 180 #endif // _WX_GENERIC_HEADERCTRLG_H_
 181