include/wx/generic/private/grid.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/generic/private/grid.h
   3 // Purpose:     Private wxGrid structures
   4 // Author:      Michael Bedward (based on code by Julian Smart, Robin Dunn)
   5 // Modified by: Santiago Palacios
   6 // Created:     1/08/1999
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Michael Bedward
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GENERIC_GRID_PRIVATE_H_
  13 #define _WX_GENERIC_GRID_PRIVATE_H_
  14
  15 #include "wx/defs.h"
  16
  17 #if wxUSE_GRID
  18
  19 // ----------------------------------------------------------------------------
  20 // array classes
  21 // ----------------------------------------------------------------------------
  22
  23 WX_DEFINE_ARRAY_WITH_DECL_PTR(wxGridCellAttr *, wxArrayAttrs,
  24                                  class WXDLLIMPEXP_ADV);
  25
  26 struct wxGridCellWithAttr
  27 {
  28     wxGridCellWithAttr(int row, int col, wxGridCellAttr *attr_)
  29         : coords(row, col), attr(attr_)
  30     {
  31         wxASSERT( attr );
  32     }
  33
  34     wxGridCellWithAttr(const wxGridCellWithAttr& other)
  35         : coords(other.coords),
  36           attr(other.attr)
  37     {
  38         attr->IncRef();
  39     }
  40
  41     wxGridCellWithAttr& operator=(const wxGridCellWithAttr& other)
  42     {
  43         coords = other.coords;
  44         if (attr != other.attr)
  45         {
  46             attr->DecRef();
  47             attr = other.attr;
  48             attr->IncRef();
  49         }
  50         return *this;
  51     }
  52
  53     void ChangeAttr(wxGridCellAttr* new_attr)
  54     {
  55         if (attr != new_attr)
  56         {
  57             // "Delete" (i.e. DecRef) the old attribute.
  58             attr->DecRef();
  59             attr = new_attr;
  60             // Take ownership of the new attribute, i.e. no IncRef.
  61         }
  62     }
  63
  64     ~wxGridCellWithAttr()
  65     {
  66         attr->DecRef();
  67     }
  68
  69     wxGridCellCoords coords;
  70     wxGridCellAttr  *attr;
  71 };
  72
  73 WX_DECLARE_OBJARRAY_WITH_DECL(wxGridCellWithAttr, wxGridCellWithAttrArray,
  74                               class WXDLLIMPEXP_ADV);
  75
  76
  77 // ----------------------------------------------------------------------------
  78 // private classes
  79 // ----------------------------------------------------------------------------
  80
  81 // header column providing access to the column information stored in wxGrid
  82 // via wxHeaderColumn interface
  83 class wxGridHeaderColumn : public wxHeaderColumn
  84 {
  85 public:
  86     wxGridHeaderColumn(wxGrid *grid, int col)
  87         : m_grid(grid),
  88           m_col(col)
  89     {
  90     }
  91
  92     virtual wxString GetTitle() const { return m_grid->GetColLabelValue(m_col); }
  93     virtual wxBitmap GetBitmap() const { return wxNullBitmap; }
  94     virtual int GetWidth() const { return m_grid->GetColSize(m_col); }
  95     virtual int GetMinWidth() const { return 0; }
  96     virtual wxAlignment GetAlignment() const
  97     {
  98         int horz,
  99             vert;
 100         m_grid->GetColLabelAlignment(&horz, &vert);
 101
 102         return static_cast<wxAlignment>(horz);
 103     }
 104
 105     virtual int GetFlags() const
 106     {
 107         // we can't know in advance whether we can sort by this column or not
 108         // with wxGrid API so suppose we can by default
 109         int flags = wxCOL_SORTABLE;
 110         if ( m_grid->CanDragColSize(m_col) )
 111             flags |= wxCOL_RESIZABLE;
 112         if ( m_grid->CanDragColMove() )
 113             flags |= wxCOL_REORDERABLE;
 114         if ( GetWidth() == 0 )
 115             flags |= wxCOL_HIDDEN;
 116
 117         return flags;
 118     }
 119
 120     virtual bool IsSortKey() const
 121     {
 122         return m_grid->IsSortingBy(m_col);
 123     }
 124
 125     virtual bool IsSortOrderAscending() const
 126     {
 127         return m_grid->IsSortOrderAscending();
 128     }
 129
 130 private:
 131     // these really should be const but are not because the column needs to be
 132     // assignable to be used in a wxVector (in STL build, in non-STL build we
 133     // avoid the need for this)
 134     wxGrid *m_grid;
 135     int m_col;
 136 };
 137
 138 // header control retreiving column information from the grid
 139 class wxGridHeaderCtrl : public wxHeaderCtrl
 140 {
 141 public:
 142     wxGridHeaderCtrl(wxGrid *owner)
 143         : wxHeaderCtrl(owner,
 144                        wxID_ANY,
 145                        wxDefaultPosition,
 146                        wxDefaultSize,
 147                        wxHD_ALLOW_HIDE |
 148                        (owner->CanDragColMove() ? wxHD_ALLOW_REORDER : 0))
 149     {
 150     }
 151
 152 protected:
 153     virtual const wxHeaderColumn& GetColumn(unsigned int idx) const
 154     {
 155         return m_columns[idx];
 156     }
 157
 158 private:
 159     wxGrid *GetOwner() const { return static_cast<wxGrid *>(GetParent()); }
 160
 161     static wxMouseEvent GetDummyMouseEvent()
 162     {
 163         // make up a dummy event for the grid event to use -- unfortunately we
 164         // can't do anything else here
 165         wxMouseEvent e;
 166         e.SetState(wxGetMouseState());
 167         return e;
 168     }
 169
 170     // override the base class method to update our m_columns array
 171     virtual void OnColumnCountChanging(unsigned int count)
 172     {
 173         const unsigned countOld = m_columns.size();
 174         if ( count < countOld )
 175         {
 176             // just discard the columns which don't exist any more (notice that
 177             // we can't use resize() here as it would require the vector
 178             // value_type, i.e. wxGridHeaderColumn to be default constructible,
 179             // which it is not)
 180             m_columns.erase(m_columns.begin() + count, m_columns.end());
 181         }
 182         else // new columns added
 183         {
 184             // add columns for the new elements
 185             for ( unsigned n = countOld; n < count; n++ )
 186                 m_columns.push_back(wxGridHeaderColumn(GetOwner(), n));
 187         }
 188     }
 189
 190     // override to implement column auto sizing
 191     virtual bool UpdateColumnWidthToFit(unsigned int idx, int widthTitle)
 192     {
 193         // TODO: currently grid doesn't support computing the column best width
 194         //       from its contents so we just use the best label width as is
 195         GetOwner()->SetColSize(idx, widthTitle);
 196
 197         return true;
 198     }
 199
 200     // overridden to react to the actions using the columns popup menu
 201     virtual void UpdateColumnVisibility(unsigned int idx, bool show)
 202     {
 203         GetOwner()->SetColSize(idx, show ? wxGRID_AUTOSIZE : 0);
 204
 205         // as this is done by the user we should notify the main program about
 206         // it
 207         GetOwner()->SendGridSizeEvent(wxEVT_GRID_COL_SIZE, -1, idx,
 208                                       GetDummyMouseEvent());
 209     }
 210
 211     // overridden to react to the columns order changes in the customization
 212     // dialog
 213     virtual void UpdateColumnsOrder(const wxArrayInt& order)
 214     {
 215         GetOwner()->SetColumnsOrder(order);
 216     }
 217
 218
 219     // event handlers forwarding wxHeaderCtrl events to wxGrid
 220     void OnClick(wxHeaderCtrlEvent& event)
 221     {
 222         GetOwner()->SendEvent(wxEVT_GRID_LABEL_LEFT_CLICK,
 223                               -1, event.GetColumn(),
 224                               GetDummyMouseEvent());
 225
 226         GetOwner()->DoColHeaderClick(event.GetColumn());
 227     }
 228
 229     void OnDoubleClick(wxHeaderCtrlEvent& event)
 230     {
 231         if ( !GetOwner()->SendEvent(wxEVT_GRID_LABEL_LEFT_DCLICK,
 232                                     -1, event.GetColumn(),
 233                                     GetDummyMouseEvent()) )
 234         {
 235             event.Skip();
 236         }
 237     }
 238
 239     void OnRightClick(wxHeaderCtrlEvent& event)
 240     {
 241         if ( !GetOwner()->SendEvent(wxEVT_GRID_LABEL_RIGHT_CLICK,
 242                                     -1, event.GetColumn(),
 243                                     GetDummyMouseEvent()) )
 244         {
 245             event.Skip();
 246         }
 247     }
 248
 249     void OnBeginResize(wxHeaderCtrlEvent& event)
 250     {
 251         GetOwner()->DoStartResizeCol(event.GetColumn());
 252
 253         event.Skip();
 254     }
 255
 256     void OnResizing(wxHeaderCtrlEvent& event)
 257     {
 258         GetOwner()->DoUpdateResizeColWidth(event.GetWidth());
 259     }
 260
 261     void OnEndResize(wxHeaderCtrlEvent& event)
 262     {
 263         // we again need to pass a mouse event to be used for the grid event
 264         // generation but we don't have it here so use a dummy one as in
 265         // UpdateColumnVisibility()
 266         wxMouseEvent e;
 267         e.SetState(wxGetMouseState());
 268         GetOwner()->DoEndDragResizeCol(e);
 269
 270         event.Skip();
 271     }
 272
 273     void OnBeginReorder(wxHeaderCtrlEvent& event)
 274     {
 275         GetOwner()->DoStartMoveCol(event.GetColumn());
 276     }
 277
 278     void OnEndReorder(wxHeaderCtrlEvent& event)
 279     {
 280         GetOwner()->DoEndMoveCol(event.GetNewOrder());
 281     }
 282
 283     wxVector<wxGridHeaderColumn> m_columns;
 284
 285     DECLARE_EVENT_TABLE()
 286     wxDECLARE_NO_COPY_CLASS(wxGridHeaderCtrl);
 287 };
 288
 289 // common base class for various grid subwindows
 290 class WXDLLIMPEXP_ADV wxGridSubwindow : public wxWindow
 291 {
 292 public:
 293     wxGridSubwindow(wxGrid *owner,
 294                     int additionalStyle = 0,
 295                     const wxString& name = wxPanelNameStr)
 296         : wxWindow(owner, wxID_ANY,
 297                    wxDefaultPosition, wxDefaultSize,
 298                    wxBORDER_NONE | additionalStyle,
 299                    name)
 300     {
 301         m_owner = owner;
 302     }
 303
 304     virtual bool AcceptsFocus() const { return false; }
 305
 306     wxGrid *GetOwner() { return m_owner; }
 307
 308 protected:
 309     void OnMouseCaptureLost(wxMouseCaptureLostEvent& event);
 310
 311     wxGrid *m_owner;
 312
 313     DECLARE_EVENT_TABLE()
 314     wxDECLARE_NO_COPY_CLASS(wxGridSubwindow);
 315 };
 316
 317 class WXDLLIMPEXP_ADV wxGridRowLabelWindow : public wxGridSubwindow
 318 {
 319 public:
 320     wxGridRowLabelWindow(wxGrid *parent)
 321       : wxGridSubwindow(parent)
 322     {
 323     }
 324
 325
 326 private:
 327     void OnPaint( wxPaintEvent& event );
 328     void OnMouseEvent( wxMouseEvent& event );
 329     void OnMouseWheel( wxMouseEvent& event );
 330
 331     DECLARE_EVENT_TABLE()
 332     wxDECLARE_NO_COPY_CLASS(wxGridRowLabelWindow);
 333 };
 334
 335
 336 class WXDLLIMPEXP_ADV wxGridColLabelWindow : public wxGridSubwindow
 337 {
 338 public:
 339     wxGridColLabelWindow(wxGrid *parent)
 340         : wxGridSubwindow(parent)
 341     {
 342     }
 343
 344
 345 private:
 346     void OnPaint( wxPaintEvent& event );
 347     void OnMouseEvent( wxMouseEvent& event );
 348     void OnMouseWheel( wxMouseEvent& event );
 349
 350     DECLARE_EVENT_TABLE()
 351     wxDECLARE_NO_COPY_CLASS(wxGridColLabelWindow);
 352 };
 353
 354
 355 class WXDLLIMPEXP_ADV wxGridCornerLabelWindow : public wxGridSubwindow
 356 {
 357 public:
 358     wxGridCornerLabelWindow(wxGrid *parent)
 359         : wxGridSubwindow(parent)
 360     {
 361     }
 362
 363 private:
 364     void OnMouseEvent( wxMouseEvent& event );
 365     void OnMouseWheel( wxMouseEvent& event );
 366     void OnPaint( wxPaintEvent& event );
 367
 368     DECLARE_EVENT_TABLE()
 369     wxDECLARE_NO_COPY_CLASS(wxGridCornerLabelWindow);
 370 };
 371
 372 class WXDLLIMPEXP_ADV wxGridWindow : public wxGridSubwindow
 373 {
 374 public:
 375     wxGridWindow(wxGrid *parent)
 376         : wxGridSubwindow(parent,
 377                           wxWANTS_CHARS | wxCLIP_CHILDREN,
 378                           "GridWindow")
 379     {
 380     }
 381
 382
 383     virtual void ScrollWindow( int dx, int dy, const wxRect *rect );
 384
 385     virtual bool AcceptsFocus() const { return true; }
 386
 387 private:
 388     void OnPaint( wxPaintEvent &event );
 389     void OnMouseWheel( wxMouseEvent& event );
 390     void OnMouseEvent( wxMouseEvent& event );
 391     void OnKeyDown( wxKeyEvent& );
 392     void OnKeyUp( wxKeyEvent& );
 393     void OnChar( wxKeyEvent& );
 394     void OnEraseBackground( wxEraseEvent& );
 395     void OnFocus( wxFocusEvent& );
 396
 397     DECLARE_EVENT_TABLE()
 398     wxDECLARE_NO_COPY_CLASS(wxGridWindow);
 399 };
 400
 401 // ----------------------------------------------------------------------------
 402 // the internal data representation used by wxGridCellAttrProvider
 403 // ----------------------------------------------------------------------------
 404
 405 // this class stores attributes set for cells
 406 class WXDLLIMPEXP_ADV wxGridCellAttrData
 407 {
 408 public:
 409     void SetAttr(wxGridCellAttr *attr, int row, int col);
 410     wxGridCellAttr *GetAttr(int row, int col) const;
 411     void UpdateAttrRows( size_t pos, int numRows );
 412     void UpdateAttrCols( size_t pos, int numCols );
 413
 414 private:
 415     // searches for the attr for given cell, returns wxNOT_FOUND if not found
 416     int FindIndex(int row, int col) const;
 417
 418     wxGridCellWithAttrArray m_attrs;
 419 };
 420
 421 // this class stores attributes set for rows or columns
 422 class WXDLLIMPEXP_ADV wxGridRowOrColAttrData
 423 {
 424 public:
 425     // empty ctor to suppress warnings
 426     wxGridRowOrColAttrData() {}
 427     ~wxGridRowOrColAttrData();
 428
 429     void SetAttr(wxGridCellAttr *attr, int rowOrCol);
 430     wxGridCellAttr *GetAttr(int rowOrCol) const;
 431     void UpdateAttrRowsOrCols( size_t pos, int numRowsOrCols );
 432
 433 private:
 434     wxArrayInt m_rowsOrCols;
 435     wxArrayAttrs m_attrs;
 436 };
 437
 438 // NB: this is just a wrapper around 3 objects: one which stores cell
 439 //     attributes, and 2 others for row/col ones
 440 class WXDLLIMPEXP_ADV wxGridCellAttrProviderData
 441 {
 442 public:
 443     wxGridCellAttrData m_cellAttrs;
 444     wxGridRowOrColAttrData m_rowAttrs,
 445                            m_colAttrs;
 446 };
 447
 448 // ----------------------------------------------------------------------------
 449 // operations classes abstracting the difference between operating on rows and
 450 // columns
 451 // ----------------------------------------------------------------------------
 452
 453 // This class allows to write a function only once because by using its methods
 454 // it will apply to both columns and rows.
 455 //
 456 // This is an abstract interface definition, the two concrete implementations
 457 // below should be used when working with rows and columns respectively.
 458 class wxGridOperations
 459 {
 460 public:
 461     // Returns the operations in the other direction, i.e. wxGridRowOperations
 462     // if this object is a wxGridColumnOperations and vice versa.
 463     virtual wxGridOperations& Dual() const = 0;
 464
 465     // Return the number of rows or columns.
 466     virtual int GetNumberOfLines(const wxGrid *grid) const = 0;
 467
 468     // Return the selection mode which allows selecting rows or columns.
 469     virtual wxGrid::wxGridSelectionModes GetSelectionMode() const = 0;
 470
 471     // Make a wxGridCellCoords from the given components: thisDir is row or
 472     // column and otherDir is column or row
 473     virtual wxGridCellCoords MakeCoords(int thisDir, int otherDir) const = 0;
 474
 475     // Calculate the scrolled position of the given abscissa or ordinate.
 476     virtual int CalcScrolledPosition(wxGrid *grid, int pos) const = 0;
 477
 478     // Selects the horizontal or vertical component from the given object.
 479     virtual int Select(const wxGridCellCoords& coords) const = 0;
 480     virtual int Select(const wxPoint& pt) const = 0;
 481     virtual int Select(const wxSize& sz) const = 0;
 482     virtual int Select(const wxRect& r) const = 0;
 483     virtual int& Select(wxRect& r) const = 0;
 484
 485     // Returns width or height of the rectangle
 486     virtual int& SelectSize(wxRect& r) const = 0;
 487
 488     // Make a wxSize such that Select() applied to it returns first component
 489     virtual wxSize MakeSize(int first, int second) const = 0;
 490
 491     // Sets the row or column component of the given cell coordinates
 492     virtual void Set(wxGridCellCoords& coords, int line) const = 0;
 493
 494
 495     // Draws a line parallel to the row or column, i.e. horizontal or vertical:
 496     // pos is the horizontal or vertical position of the line and start and end
 497     // are the coordinates of the line extremities in the other direction
 498     virtual void
 499         DrawParallelLine(wxDC& dc, int start, int end, int pos) const = 0;
 500
 501     // Draw a horizontal or vertical line across the given rectangle
 502     // (this is implemented in terms of above and uses Select() to extract
 503     // start and end from the given rectangle)
 504     void DrawParallelLineInRect(wxDC& dc, const wxRect& rect, int pos) const
 505     {
 506         const int posStart = Select(rect.GetPosition());
 507         DrawParallelLine(dc, posStart, posStart + Select(rect.GetSize()), pos);
 508     }
 509
 510
 511     // Return the index of the row or column at the given pixel coordinate.
 512     virtual int
 513         PosToLine(const wxGrid *grid, int pos, bool clip = false) const = 0;
 514
 515     // Get the top/left position, in pixels, of the given row or column
 516     virtual int GetLineStartPos(const wxGrid *grid, int line) const = 0;
 517
 518     // Get the bottom/right position, in pixels, of the given row or column
 519     virtual int GetLineEndPos(const wxGrid *grid, int line) const = 0;
 520
 521     // Get the height/width of the given row/column
 522     virtual int GetLineSize(const wxGrid *grid, int line) const = 0;
 523
 524     // Get wxGrid::m_rowBottoms/m_colRights array
 525     virtual const wxArrayInt& GetLineEnds(const wxGrid *grid) const = 0;
 526
 527     // Get default height row height or column width
 528     virtual int GetDefaultLineSize(const wxGrid *grid) const = 0;
 529
 530     // Return the minimal acceptable row height or column width
 531     virtual int GetMinimalAcceptableLineSize(const wxGrid *grid) const = 0;
 532
 533     // Return the minimal row height or column width
 534     virtual int GetMinimalLineSize(const wxGrid *grid, int line) const = 0;
 535
 536     // Set the row height or column width
 537     virtual void SetLineSize(wxGrid *grid, int line, int size) const = 0;
 538
 539     // Set the row default height or column default width
 540     virtual void SetDefaultLineSize(wxGrid *grid, int size, bool resizeExisting) const = 0;
 541
 542
 543     // Return the index of the line at the given position
 544     //
 545     // NB: currently this is always identity for the rows as reordering is only
 546     //     implemented for the lines
 547     virtual int GetLineAt(const wxGrid *grid, int line) const = 0;
 548
 549
 550     // Get the row or column label window
 551     virtual wxWindow *GetHeaderWindow(wxGrid *grid) const = 0;
 552
 553     // Get the width or height of the row or column label window
 554     virtual int GetHeaderWindowSize(wxGrid *grid) const = 0;
 555
 556
 557     // This class is never used polymorphically but give it a virtual dtor
 558     // anyhow to suppress g++ complaints about it
 559     virtual ~wxGridOperations() { }
 560 };
 561
 562 class wxGridRowOperations : public wxGridOperations
 563 {
 564 public:
 565     virtual wxGridOperations& Dual() const;
 566
 567     virtual int GetNumberOfLines(const wxGrid *grid) const
 568         { return grid->GetNumberRows(); }
 569
 570     virtual wxGrid::wxGridSelectionModes GetSelectionMode() const
 571         { return wxGrid::wxGridSelectRows; }
 572
 573     virtual wxGridCellCoords MakeCoords(int thisDir, int otherDir) const
 574         { return wxGridCellCoords(thisDir, otherDir); }
 575
 576     virtual int CalcScrolledPosition(wxGrid *grid, int pos) const
 577         { return grid->CalcScrolledPosition(wxPoint(pos, 0)).x; }
 578
 579     virtual int Select(const wxGridCellCoords& c) const { return c.GetRow(); }
 580     virtual int Select(const wxPoint& pt) const { return pt.x; }
 581     virtual int Select(const wxSize& sz) const { return sz.x; }
 582     virtual int Select(const wxRect& r) const { return r.x; }
 583     virtual int& Select(wxRect& r) const { return r.x; }
 584     virtual int& SelectSize(wxRect& r) const { return r.width; }
 585     virtual wxSize MakeSize(int first, int second) const
 586         { return wxSize(first, second); }
 587     virtual void Set(wxGridCellCoords& coords, int line) const
 588         { coords.SetRow(line); }
 589
 590     virtual void DrawParallelLine(wxDC& dc, int start, int end, int pos) const
 591         { dc.DrawLine(start, pos, end, pos); }
 592
 593     virtual int PosToLine(const wxGrid *grid, int pos, bool clip = false) const
 594         { return grid->YToRow(pos, clip); }
 595     virtual int GetLineStartPos(const wxGrid *grid, int line) const
 596         { return grid->GetRowTop(line); }
 597     virtual int GetLineEndPos(const wxGrid *grid, int line) const
 598         { return grid->GetRowBottom(line); }
 599     virtual int GetLineSize(const wxGrid *grid, int line) const
 600         { return grid->GetRowHeight(line); }
 601     virtual const wxArrayInt& GetLineEnds(const wxGrid *grid) const
 602         { return grid->m_rowBottoms; }
 603     virtual int GetDefaultLineSize(const wxGrid *grid) const
 604         { return grid->GetDefaultRowSize(); }
 605     virtual int GetMinimalAcceptableLineSize(const wxGrid *grid) const
 606         { return grid->GetRowMinimalAcceptableHeight(); }
 607     virtual int GetMinimalLineSize(const wxGrid *grid, int line) const
 608         { return grid->GetRowMinimalHeight(line); }
 609     virtual void SetLineSize(wxGrid *grid, int line, int size) const
 610         { grid->SetRowSize(line, size); }
 611     virtual void SetDefaultLineSize(wxGrid *grid, int size, bool resizeExisting) const
 612         {  grid->SetDefaultRowSize(size, resizeExisting); }
 613
 614     virtual int GetLineAt(const wxGrid * WXUNUSED(grid), int line) const
 615         { return line; } // TODO: implement row reordering
 616
 617     virtual wxWindow *GetHeaderWindow(wxGrid *grid) const
 618         { return grid->GetGridRowLabelWindow(); }
 619     virtual int GetHeaderWindowSize(wxGrid *grid) const
 620         { return grid->GetRowLabelSize(); }
 621 };
 622
 623 class wxGridColumnOperations : public wxGridOperations
 624 {
 625 public:
 626     virtual wxGridOperations& Dual() const;
 627
 628     virtual int GetNumberOfLines(const wxGrid *grid) const
 629         { return grid->GetNumberCols(); }
 630
 631     virtual wxGrid::wxGridSelectionModes GetSelectionMode() const
 632         { return wxGrid::wxGridSelectColumns; }
 633
 634     virtual wxGridCellCoords MakeCoords(int thisDir, int otherDir) const
 635         { return wxGridCellCoords(otherDir, thisDir); }
 636
 637     virtual int CalcScrolledPosition(wxGrid *grid, int pos) const
 638         { return grid->CalcScrolledPosition(wxPoint(0, pos)).y; }
 639
 640     virtual int Select(const wxGridCellCoords& c) const { return c.GetCol(); }
 641     virtual int Select(const wxPoint& pt) const { return pt.y; }
 642     virtual int Select(const wxSize& sz) const { return sz.y; }
 643     virtual int Select(const wxRect& r) const { return r.y; }
 644     virtual int& Select(wxRect& r) const { return r.y; }
 645     virtual int& SelectSize(wxRect& r) const { return r.height; }
 646     virtual wxSize MakeSize(int first, int second) const
 647         { return wxSize(second, first); }
 648     virtual void Set(wxGridCellCoords& coords, int line) const
 649         { coords.SetCol(line); }
 650
 651     virtual void DrawParallelLine(wxDC& dc, int start, int end, int pos) const
 652         { dc.DrawLine(pos, start, pos, end); }
 653
 654     virtual int PosToLine(const wxGrid *grid, int pos, bool clip = false) const
 655         { return grid->XToCol(pos, clip); }
 656     virtual int GetLineStartPos(const wxGrid *grid, int line) const
 657         { return grid->GetColLeft(line); }
 658     virtual int GetLineEndPos(const wxGrid *grid, int line) const
 659         { return grid->GetColRight(line); }
 660     virtual int GetLineSize(const wxGrid *grid, int line) const
 661         { return grid->GetColWidth(line); }
 662     virtual const wxArrayInt& GetLineEnds(const wxGrid *grid) const
 663         { return grid->m_colRights; }
 664     virtual int GetDefaultLineSize(const wxGrid *grid) const
 665         { return grid->GetDefaultColSize(); }
 666     virtual int GetMinimalAcceptableLineSize(const wxGrid *grid) const
 667         { return grid->GetColMinimalAcceptableWidth(); }
 668     virtual int GetMinimalLineSize(const wxGrid *grid, int line) const
 669         { return grid->GetColMinimalWidth(line); }
 670     virtual void SetLineSize(wxGrid *grid, int line, int size) const
 671         { grid->SetColSize(line, size); }
 672     virtual void SetDefaultLineSize(wxGrid *grid, int size, bool resizeExisting) const
 673         {  grid->SetDefaultColSize(size, resizeExisting); }
 674
 675     virtual int GetLineAt(const wxGrid *grid, int line) const
 676         { return grid->GetColAt(line); }
 677
 678     virtual wxWindow *GetHeaderWindow(wxGrid *grid) const
 679         { return grid->GetGridColLabelWindow(); }
 680     virtual int GetHeaderWindowSize(wxGrid *grid) const
 681         { return grid->GetColLabelSize(); }
 682 };
 683
 684 // This class abstracts the difference between operations going forward
 685 // (down/right) and backward (up/left) and allows to use the same code for
 686 // functions which differ only in the direction of grid traversal
 687 //
 688 // Like wxGridOperations it's an ABC with two concrete subclasses below. Unlike
 689 // it, this is a normal object and not just a function dispatch table and has a
 690 // non-default ctor.
 691 //
 692 // Note: the explanation of this discrepancy is the existence of (very useful)
 693 // Dual() method in wxGridOperations which forces us to make wxGridOperations a
 694 // function dispatcher only.
 695 class wxGridDirectionOperations
 696 {
 697 public:
 698     // The oper parameter to ctor selects whether we work with rows or columns
 699     wxGridDirectionOperations(wxGrid *grid, const wxGridOperations& oper)
 700         : m_grid(grid),
 701           m_oper(oper)
 702     {
 703     }
 704
 705     // Check if the component of this point in our direction is at the
 706     // boundary, i.e. is the first/last row/column
 707     virtual bool IsAtBoundary(const wxGridCellCoords& coords) const = 0;
 708
 709     // Increment the component of this point in our direction
 710     virtual void Advance(wxGridCellCoords& coords) const = 0;
 711
 712     // Find the line at the given distance, in pixels, away from this one
 713     // (this uses clipping, i.e. anything after the last line is counted as the
 714     // last one and anything before the first one as 0)
 715     virtual int MoveByPixelDistance(int line, int distance) const = 0;
 716
 717     // This class is never used polymorphically but give it a virtual dtor
 718     // anyhow to suppress g++ complaints about it
 719     virtual ~wxGridDirectionOperations() { }
 720
 721 protected:
 722     wxGrid * const m_grid;
 723     const wxGridOperations& m_oper;
 724 };
 725
 726 class wxGridBackwardOperations : public wxGridDirectionOperations
 727 {
 728 public:
 729     wxGridBackwardOperations(wxGrid *grid, const wxGridOperations& oper)
 730         : wxGridDirectionOperations(grid, oper)
 731     {
 732     }
 733
 734     virtual bool IsAtBoundary(const wxGridCellCoords& coords) const
 735     {
 736         wxASSERT_MSG( m_oper.Select(coords) >= 0, "invalid row/column" );
 737
 738         return m_oper.Select(coords) == 0;
 739     }
 740
 741     virtual void Advance(wxGridCellCoords& coords) const
 742     {
 743         wxASSERT( !IsAtBoundary(coords) );
 744
 745         m_oper.Set(coords, m_oper.Select(coords) - 1);
 746     }
 747
 748     virtual int MoveByPixelDistance(int line, int distance) const
 749     {
 750         int pos = m_oper.GetLineStartPos(m_grid, line);
 751         return m_oper.PosToLine(m_grid, pos - distance + 1, true);
 752     }
 753 };
 754
 755 class wxGridForwardOperations : public wxGridDirectionOperations
 756 {
 757 public:
 758     wxGridForwardOperations(wxGrid *grid, const wxGridOperations& oper)
 759         : wxGridDirectionOperations(grid, oper),
 760           m_numLines(oper.GetNumberOfLines(grid))
 761     {
 762     }
 763
 764     virtual bool IsAtBoundary(const wxGridCellCoords& coords) const
 765     {
 766         wxASSERT_MSG( m_oper.Select(coords) < m_numLines, "invalid row/column" );
 767
 768         return m_oper.Select(coords) == m_numLines - 1;
 769     }
 770
 771     virtual void Advance(wxGridCellCoords& coords) const
 772     {
 773         wxASSERT( !IsAtBoundary(coords) );
 774
 775         m_oper.Set(coords, m_oper.Select(coords) + 1);
 776     }
 777
 778     virtual int MoveByPixelDistance(int line, int distance) const
 779     {
 780         int pos = m_oper.GetLineStartPos(m_grid, line);
 781         return m_oper.PosToLine(m_grid, pos + distance, true);
 782     }
 783
 784 private:
 785     const int m_numLines;
 786 };
 787
 788 // ----------------------------------------------------------------------------
 789 // private helpers
 790 // ----------------------------------------------------------------------------
 791
 792 namespace
 793 {
 794
 795 // ensure that first is less or equal to second, swapping the values if
 796 // necessary
 797 void EnsureFirstLessThanSecond(int& first, int& second)
 798 {
 799     if ( first > second )
 800         wxSwap(first, second);
 801 }
 802
 803 } // anonymous namespace
 804
 805 // ----------------------------------------------------------------------------
 806 // data structures used for the data type registry
 807 // ----------------------------------------------------------------------------
 808
 809 struct wxGridDataTypeInfo
 810 {
 811     wxGridDataTypeInfo(const wxString& typeName,
 812                        wxGridCellRenderer* renderer,
 813                        wxGridCellEditor* editor)
 814         : m_typeName(typeName), m_renderer(renderer), m_editor(editor)
 815         {}
 816
 817     ~wxGridDataTypeInfo()
 818     {
 819         wxSafeDecRef(m_renderer);
 820         wxSafeDecRef(m_editor);
 821     }
 822
 823     wxString            m_typeName;
 824     wxGridCellRenderer* m_renderer;
 825     wxGridCellEditor*   m_editor;
 826
 827     wxDECLARE_NO_COPY_CLASS(wxGridDataTypeInfo);
 828 };
 829
 830
 831 WX_DEFINE_ARRAY_WITH_DECL_PTR(wxGridDataTypeInfo*, wxGridDataTypeInfoArray,
 832                                  class WXDLLIMPEXP_ADV);
 833
 834
 835 class WXDLLIMPEXP_ADV wxGridTypeRegistry
 836 {
 837 public:
 838     wxGridTypeRegistry() {}
 839     ~wxGridTypeRegistry();
 840
 841     void RegisterDataType(const wxString& typeName,
 842                      wxGridCellRenderer* renderer,
 843                      wxGridCellEditor* editor);
 844
 845     // find one of already registered data types
 846     int FindRegisteredDataType(const wxString& typeName);
 847
 848     // try to FindRegisteredDataType(), if this fails and typeName is one of
 849     // standard typenames, register it and return its index
 850     int FindDataType(const wxString& typeName);
 851
 852     // try to FindDataType(), if it fails see if it is not one of already
 853     // registered data types with some params in which case clone the
 854     // registered data type and set params for it
 855     int FindOrCloneDataType(const wxString& typeName);
 856
 857     wxGridCellRenderer* GetRenderer(int index);
 858     wxGridCellEditor*   GetEditor(int index);
 859
 860 private:
 861     wxGridDataTypeInfoArray m_typeinfo;
 862 };
 863
 864 #endif // wxUSE_GRID
 865 #endif // _WX_GENERIC_GRID_PRIVATE_H_