include/wx/headerctrl.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/headerctrl.h
   3 // Purpose:     wxHeaderCtrlBase class: interface of wxHeaderCtrl
   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_HEADERCTRL_H_
  12 #define _WX_HEADERCTRL_H_
  13
  14 #include "wx/control.h"
  15
  16 #include "wx/dynarray.h"
  17 #include "wx/vector.h"
  18
  19 #include "wx/headercol.h"
  20
  21 // notice that the classes in this header are defined in the core library even
  22 // although currently they're only used by wxGrid which is in wxAdv because we
  23 // plan to use it in wxListCtrl which is in core too in the future
  24 class WXDLLIMPEXP_FWD_CORE wxHeaderCtrlEvent;
  25
  26 // ----------------------------------------------------------------------------
  27 // constants
  28 // ----------------------------------------------------------------------------
  29
  30 enum
  31 {
  32     // allow column drag and drop
  33     wxHD_DRAGDROP = 0x0001,
  34
  35     // style used by default when creating the control
  36     wxHD_DEFAULT_STYLE = wxHD_DRAGDROP
  37 };
  38
  39 extern WXDLLIMPEXP_DATA_CORE(const char) wxHeaderCtrlNameStr[];
  40
  41 // ----------------------------------------------------------------------------
  42 // wxHeaderCtrlBase defines the interface of a header control
  43 // ----------------------------------------------------------------------------
  44
  45 class WXDLLIMPEXP_CORE wxHeaderCtrlBase : public wxControl
  46 {
  47 public:
  48     /*
  49         Derived classes must provide default ctor as well as a ctor and
  50         Create() function with the following signatures:
  51
  52     wxHeaderCtrl(wxWindow *parent,
  53                  wxWindowID winid = wxID_ANY,
  54                  const wxPoint& pos = wxDefaultPosition,
  55                  const wxSize& size = wxDefaultSize,
  56                  long style = wxHD_DEFAULT_STYLE,
  57                  const wxString& name = wxHeaderCtrlNameStr);
  58
  59     bool Create(wxWindow *parent,
  60                 wxWindowID winid = wxID_ANY,
  61                 const wxPoint& pos = wxDefaultPosition,
  62                 const wxSize& size = wxDefaultSize,
  63                 long style = wxHD_DEFAULT_STYLE,
  64                 const wxString& name = wxHeaderCtrlNameStr);
  65      */
  66
  67     // column-related methods
  68     // ----------------------
  69
  70     // set the number of columns in the control
  71     //
  72     // this also calls UpdateColumn() for all columns
  73     void SetColumnCount(unsigned int count);
  74
  75     // return the number of columns in the control as set by SetColumnCount()
  76     unsigned int GetColumnCount() const { return DoGetCount(); }
  77
  78     // return whether the control has any columns
  79     bool IsEmpty() const { return DoGetCount() == 0; }
  80
  81     // update the column with the given index
  82     void UpdateColumn(unsigned int idx)
  83     {
  84         wxCHECK_RET( idx < GetColumnCount(), "invalid column index" );
  85
  86         DoUpdate(idx);
  87     }
  88
  89     // set the columns order: the array defines the column index which appears
  90     // the given position, it must have GetColumnCount() elements and contain
  91     // all indices exactly once
  92     void SetColumnsOrder(const wxArrayInt& order);
  93     wxArrayInt GetColumnsOrder() const;
  94
  95     // get the index of the column at the given display position
  96     unsigned int GetColumnAt(unsigned int pos) const;
  97
  98     // get the position at which this column is currently displayed
  99     unsigned int GetColumnPos(unsigned int idx) const;
 100
 101     // reset the columns order to the natural one
 102     void ResetColumnsOrder();
 103
 104     // helper function used by the generic version of this control and also
 105     // wxGrid: reshuffles the array of column indices indexed by positions
 106     // (i.e. using the same convention as for SetColumnsOrder()) so that the
 107     // column with the given index is found at the specified position
 108     static void MoveColumnInOrderArray(wxArrayInt& order,
 109                                        unsigned int idx,
 110                                        unsigned int pos);
 111
 112
 113     // implementation only from now on
 114     // -------------------------------
 115
 116     // the user doesn't need to TAB to this control
 117     virtual bool AcceptsFocusFromKeyboard() const { return false; }
 118
 119     // this method is only overridden in order to synchronize the control with
 120     // the main window when it is scrolled, the derived class must implement
 121     // DoScrollHorz()
 122     virtual void ScrollWindow(int dx, int dy, const wxRect *rect = NULL);
 123
 124 protected:
 125     // this method must be implemented by the derived classes to return the
 126     // information for the given column
 127     virtual wxHeaderColumn& GetColumn(unsigned int idx) = 0;
 128
 129     // this method is called from the default EVT_HEADER_SEPARATOR_DCLICK
 130     // handler to update the fitting column width of the given column, it
 131     // should return true if the width was really updated
 132     virtual bool UpdateColumnWidthToFit(unsigned int WXUNUSED(idx),
 133                                         int WXUNUSED(widthTitle))
 134     {
 135         return false;
 136     }
 137
 138     // this method can be overridden in the derived classes to do something
 139     // (e.g. update/resize some internal data structures) before the number of
 140     // columns in the control changes
 141     virtual void OnColumnCountChanging(unsigned int WXUNUSED(count)) { }
 142
 143
 144     // helper function for the derived classes: update the array of column
 145     // indices after the number of columns changed
 146     void DoResizeColumnIndices(wxArrayInt& colIndices, unsigned int count);
 147
 148 private:
 149     // methods implementing our public API and defined in platform-specific
 150     // implementations
 151     virtual void DoSetCount(unsigned int count) = 0;
 152     virtual unsigned int DoGetCount() const = 0;
 153     virtual void DoUpdate(unsigned int idx) = 0;
 154
 155     virtual void DoScrollHorz(int dx) = 0;
 156
 157     virtual void DoSetColumnsOrder(const wxArrayInt& order) = 0;
 158     virtual wxArrayInt DoGetColumnsOrder() const = 0;
 159
 160     // this window doesn't look nice with the border so don't use it by default
 161     virtual wxBorder GetDefaultBorder() const { return wxBORDER_NONE; }
 162
 163     // event handlers
 164     void OnSeparatorDClick(wxHeaderCtrlEvent& event);
 165
 166     DECLARE_EVENT_TABLE()
 167 };
 168
 169 // ----------------------------------------------------------------------------
 170 // wxHeaderCtrl: port-specific header control implementation, notice that this
 171 //               is still an ABC which is meant to be used as part of another
 172 //               control, see wxHeaderCtrlSimple for a standalone version
 173 // ----------------------------------------------------------------------------
 174
 175 #if defined(__WXMSW__) && !defined(__WXUNIVERSAL__)
 176     #include "wx/msw/headerctrl.h"
 177 #else
 178     #define wxHAS_GENERIC_HEADERCTRL
 179     #include "wx/generic/headerctrlg.h"
 180 #endif // platform
 181
 182 // ----------------------------------------------------------------------------
 183 // wxHeaderCtrlSimple: concrete header control which can be used standalone
 184 // ----------------------------------------------------------------------------
 185
 186 class WXDLLIMPEXP_CORE wxHeaderCtrlSimple : public wxHeaderCtrl
 187 {
 188 public:
 189     // control creation
 190     // ----------------
 191
 192     wxHeaderCtrlSimple() { Init(); }
 193     wxHeaderCtrlSimple(wxWindow *parent,
 194                        wxWindowID winid = wxID_ANY,
 195                        const wxPoint& pos = wxDefaultPosition,
 196                        const wxSize& size = wxDefaultSize,
 197                        long style = wxHD_DEFAULT_STYLE,
 198                        const wxString& name = wxHeaderCtrlNameStr)
 199     {
 200         Init();
 201
 202         Create(parent, winid, pos, size, style, name);
 203     }
 204
 205     // managing the columns
 206     // --------------------
 207
 208     // insert the column at the given position, using GetColumnCount() as
 209     // position appends it at the end
 210     void InsertColumn(const wxHeaderColumnSimple& col, unsigned int idx)
 211     {
 212         wxCHECK_RET( idx <= GetColumnCount(), "invalid column index" );
 213
 214         DoInsert(col, idx);
 215     }
 216
 217     // append the column to the end of the control
 218     void AppendColumn(const wxHeaderColumnSimple& col)
 219     {
 220         DoInsert(col, GetColumnCount());
 221     }
 222
 223     // delete the column at the given index
 224     void DeleteColumn(unsigned int idx)
 225     {
 226         wxCHECK_RET( idx < GetColumnCount(), "invalid column index" );
 227
 228         DoDelete(idx);
 229     }
 230
 231     // delete all the existing columns
 232     void DeleteAllColumns();
 233
 234
 235     // modifying columns
 236     // -----------------
 237
 238     // show or hide the column, notice that even when a column is hidden we
 239     // still account for it when using indices
 240     void ShowColumn(unsigned int idx, bool show = true)
 241     {
 242         wxCHECK_RET( idx < GetColumnCount(), "invalid column index" );
 243
 244         DoShowColumn(idx, show);
 245     }
 246
 247     void HideColumn(unsigned int idx)
 248     {
 249         ShowColumn(idx, false);
 250     }
 251
 252     // indicate that the column is used for sorting
 253     void ShowSortIndicator(unsigned int idx, bool ascending = true)
 254     {
 255         wxCHECK_RET( idx < GetColumnCount(), "invalid column index" );
 256
 257         DoShowSortIndicator(idx, ascending);
 258     }
 259
 260     // remove the sort indicator completely
 261     void RemoveSortIndicator();
 262
 263 protected:
 264     // implement/override base class methods
 265     virtual wxHeaderColumn& GetColumn(unsigned int idx);
 266     virtual bool UpdateColumnWidthToFit(unsigned int idx, int widthTitle);
 267
 268     // and define another one to be overridden in the derived classes: it
 269     // should return the best width for the given column contents or -1 if not
 270     // implemented, we use it to implement UpdateColumnWidthToFit()
 271     virtual int GetBestFittingWidth(unsigned int WXUNUSED(idx)) const
 272     {
 273         return -1;
 274     }
 275
 276 private:
 277     // functions implementing our public API
 278     void DoInsert(const wxHeaderColumnSimple& col, unsigned int idx);
 279     void DoDelete(unsigned int idx);
 280     void DoShowColumn(unsigned int idx, bool show);
 281     void DoShowSortIndicator(unsigned int idx, bool ascending);
 282
 283     // common part of all ctors
 284     void Init();
 285
 286     // bring the column count in sync with the number of columns we store
 287     void UpdateColumnCount() { SetColumnCount(m_cols.size()); }
 288
 289
 290     // all our current columns
 291     typedef wxVector<wxHeaderColumnSimple> Columns;
 292     Columns m_cols;
 293
 294     // the column currently used for sorting or -1 if none
 295     unsigned int m_sortKey;
 296
 297
 298     DECLARE_NO_COPY_CLASS(wxHeaderCtrlSimple)
 299 };
 300
 301 // ----------------------------------------------------------------------------
 302 // wxHeaderCtrl events
 303 // ----------------------------------------------------------------------------
 304
 305 class WXDLLIMPEXP_CORE wxHeaderCtrlEvent : public wxNotifyEvent
 306 {
 307 public:
 308     wxHeaderCtrlEvent(wxEventType commandType = wxEVT_NULL, int winid = 0)
 309         : wxNotifyEvent(commandType, winid),
 310           m_col(-1),
 311           m_width(0),
 312           m_order(static_cast<unsigned int>(-1))
 313     {
 314     }
 315
 316     wxHeaderCtrlEvent(const wxHeaderCtrlEvent& event)
 317         : wxNotifyEvent(event),
 318           m_col(event.m_col),
 319           m_width(event.m_width),
 320           m_order(event.m_order)
 321     {
 322     }
 323
 324     // the column which this event pertains to: valid for all header events
 325     int GetColumn() const { return m_col; }
 326     void SetColumn(int col) { m_col = col; }
 327
 328     // the width of the column: valid for column resizing/dragging events only
 329     int GetWidth() const { return m_width; }
 330     void SetWidth(int width) { m_width = width; }
 331
 332     // the new position of the column: for end reorder events only
 333     unsigned int GetNewOrder() const { return m_order; }
 334     void SetNewOrder(unsigned int order) { m_order = order; }
 335
 336     virtual wxEvent *Clone() const { return new wxHeaderCtrlEvent(*this); }
 337
 338 protected:
 339     // the column affected by the event
 340     int m_col;
 341
 342     // the current width for the dragging events
 343     int m_width;
 344
 345     // the new column position for end reorder event
 346     unsigned int m_order;
 347
 348 private:
 349     DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxHeaderCtrlEvent)
 350 };
 351
 352
 353 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_CLICK;
 354 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_RIGHT_CLICK;
 355 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_MIDDLE_CLICK;
 356
 357 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_DCLICK;
 358 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_RIGHT_DCLICK;
 359 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_MIDDLE_DCLICK;
 360
 361 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_SEPARATOR_DCLICK;
 362
 363 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_BEGIN_RESIZE;
 364 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_RESIZING;
 365 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_END_RESIZE;
 366
 367 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_BEGIN_REORDER;
 368 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_END_REORDER;
 369
 370 extern WXDLLIMPEXP_CORE const wxEventType wxEVT_COMMAND_HEADER_DRAGGING_CANCELLED;
 371
 372 typedef void (wxEvtHandler::*wxHeaderCtrlEventFunction)(wxHeaderCtrlEvent&);
 373
 374 #define wxHeaderCtrlEventHandler(func) \
 375     (wxObjectEventFunction)(wxEventFunction)wxStaticCastEvent( \
 376             wxHeaderCtrlEventFunction, &func)
 377
 378 #define wx__DECLARE_HEADER_EVT(evt, id, fn) \
 379     wx__DECLARE_EVT1(wxEVT_COMMAND_HEADER_ ## evt, id, wxHeaderCtrlEventHandler(fn))
 380
 381 #define EVT_HEADER_CLICK(id, fn) wx__DECLARE_HEADER_EVT(CLICK, id, fn)
 382 #define EVT_HEADER_RIGHT_CLICK(id, fn) wx__DECLARE_HEADER_EVT(RIGHT_CLICK, id, fn)
 383 #define EVT_HEADER_MIDDLE_CLICK(id, fn) wx__DECLARE_HEADER_EVT(MIDDLE_CLICK, id, fn)
 384
 385 #define EVT_HEADER_DCLICK(id, fn) wx__DECLARE_HEADER_EVT(DCLICK, id, fn)
 386 #define EVT_HEADER_RIGHT_DCLICK(id, fn) wx__DECLARE_HEADER_EVT(RIGHT_DCLICK, id, fn)
 387 #define EVT_HEADER_MIDDLE_DCLICK(id, fn) wx__DECLARE_HEADER_EVT(MIDDLE_DCLICK, id, fn)
 388
 389 #define EVT_HEADER_SEPARATOR_DCLICK(id, fn) wx__DECLARE_HEADER_EVT(SEPARATOR_DCLICK, id, fn)
 390
 391 #define EVT_HEADER_BEGIN_RESIZE(id, fn) wx__DECLARE_HEADER_EVT(BEGIN_RESIZE, id, fn)
 392 #define EVT_HEADER_RESIZING(id, fn) wx__DECLARE_HEADER_EVT(RESIZING, id, fn)
 393 #define EVT_HEADER_END_RESIZE(id, fn) wx__DECLARE_HEADER_EVT(END_RESIZE, id, fn)
 394
 395 #define EVT_HEADER_BEGIN_REORDER(id, fn) wx__DECLARE_HEADER_EVT(BEGIN_REORDER, id, fn)
 396 #define EVT_HEADER_END_REORDER(id, fn) wx__DECLARE_HEADER_EVT(END_REORDER, id, fn)
 397
 398 #define EVT_HEADER_DRAGGING_CANCELLED(id, fn) wx__DECLARE_HEADER_EVT(DRAGGING_CANCELLED, id, fn)
 399
 400 #endif // _WX_HEADERCTRL_H_