include/wx/univ/textctrl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/univ/textctrl.h
   3 // Purpose:     wxTextCtrl class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     15.09.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_UNIV_TEXTCTRL_H_
  13 #define _WX_UNIV_TEXTCTRL_H_
  14
  15 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  16     #pragma interface "univtextctrl.h"
  17 #endif
  18
  19 class WXDLLEXPORT wxCaret;
  20 class WXDLLEXPORT wxTextCtrlCommandProcessor;
  21
  22 #include "wx/scrolwin.h"    // for wxScrollHelper
  23
  24 #include "wx/univ/inphand.h"
  25
  26 // ----------------------------------------------------------------------------
  27 // wxTextCtrl actions
  28 // ----------------------------------------------------------------------------
  29
  30 // cursor movement and also selection and delete operations
  31 #define wxACTION_TEXT_GOTO          _T("goto")  // to pos in numArg
  32 #define wxACTION_TEXT_FIRST         _T("first") // go to pos 0
  33 #define wxACTION_TEXT_LAST          _T("last")  // go to last pos
  34 #define wxACTION_TEXT_HOME          _T("home")
  35 #define wxACTION_TEXT_END           _T("end")
  36 #define wxACTION_TEXT_LEFT          _T("left")
  37 #define wxACTION_TEXT_RIGHT         _T("right")
  38 #define wxACTION_TEXT_UP            _T("up")
  39 #define wxACTION_TEXT_DOWN          _T("down")
  40 #define wxACTION_TEXT_WORD_LEFT     _T("wordleft")
  41 #define wxACTION_TEXT_WORD_RIGHT    _T("wordright")
  42 #define wxACTION_TEXT_PAGE_UP       _T("pageup")
  43 #define wxACTION_TEXT_PAGE_DOWN     _T("pagedown")
  44
  45 // clipboard operations
  46 #define wxACTION_TEXT_COPY          _T("copy")
  47 #define wxACTION_TEXT_CUT           _T("cut")
  48 #define wxACTION_TEXT_PASTE         _T("paste")
  49
  50 // insert text at the cursor position: the text is in strArg of PerformAction
  51 #define wxACTION_TEXT_INSERT        _T("insert")
  52
  53 // if the action starts with either of these prefixes and the rest of the
  54 // string is one of the movement commands, it means to select/delete text from
  55 // the current cursor position to the new one
  56 #define wxACTION_TEXT_PREFIX_SEL    _T("sel")
  57 #define wxACTION_TEXT_PREFIX_DEL    _T("del")
  58
  59 // mouse selection
  60 #define wxACTION_TEXT_ANCHOR_SEL    _T("anchorsel")
  61 #define wxACTION_TEXT_EXTEND_SEL    _T("extendsel")
  62 #define wxACTION_TEXT_SEL_WORD      _T("wordsel")
  63 #define wxACTION_TEXT_SEL_LINE      _T("linesel")
  64
  65 // undo or redo
  66 #define wxACTION_TEXT_UNDO          _T("undo")
  67 #define wxACTION_TEXT_REDO          _T("redo")
  68
  69 // ----------------------------------------------------------------------------
  70 // wxTextCtrl
  71 // ----------------------------------------------------------------------------
  72
  73 class WXDLLEXPORT wxTextCtrl : public wxTextCtrlBase, public wxScrollHelper
  74 {
  75 public:
  76     // creation
  77     // --------
  78
  79     wxTextCtrl() { Init(); }
  80
  81     wxTextCtrl(wxWindow *parent,
  82                wxWindowID id,
  83                const wxString& value = wxEmptyString,
  84                const wxPoint& pos = wxDefaultPosition,
  85                const wxSize& size = wxDefaultSize,
  86                long style = 0,
  87                const wxValidator& validator = wxDefaultValidator,
  88                const wxString& name = wxTextCtrlNameStr)
  89     {
  90         Init();
  91
  92         Create(parent, id, value, pos, size, style, validator, name);
  93     }
  94
  95     bool Create(wxWindow *parent,
  96                 wxWindowID id,
  97                 const wxString& value = wxEmptyString,
  98                 const wxPoint& pos = wxDefaultPosition,
  99                 const wxSize& size = wxDefaultSize,
 100                 long style = 0,
 101                 const wxValidator& validator = wxDefaultValidator,
 102                 const wxString& name = wxTextCtrlNameStr);
 103
 104     virtual ~wxTextCtrl();
 105
 106     // implement base class pure virtuals
 107     // ----------------------------------
 108
 109     virtual wxString GetValue() const;
 110     virtual void SetValue(const wxString& value);
 111
 112     virtual int GetLineLength(wxTextCoord lineNo) const;
 113     virtual wxString GetLineText(wxTextCoord lineNo) const;
 114     virtual int GetNumberOfLines() const;
 115
 116     virtual bool IsModified() const;
 117     virtual bool IsEditable() const;
 118
 119     // If the return values from and to are the same, there is no selection.
 120     virtual void GetSelection(wxTextPos* from, wxTextPos* to) const;
 121
 122     // operations
 123     // ----------
 124
 125     // editing
 126     virtual void Clear();
 127     virtual void Replace(wxTextPos from, wxTextPos to, const wxString& value);
 128     virtual void Remove(wxTextPos from, wxTextPos to);
 129
 130     // sets/clears the dirty flag
 131     virtual void MarkDirty();
 132     virtual void DiscardEdits();
 133
 134     // writing text inserts it at the current position, appending always
 135     // inserts it at the end
 136     virtual void WriteText(const wxString& text);
 137     virtual void AppendText(const wxString& text);
 138
 139     // translate between the position (which is just an index in the text ctrl
 140     // considering all its contents as a single strings) and (x, y) coordinates
 141     // which represent (logical, i.e. unwrapped) column and line.
 142     virtual wxTextPos XYToPosition(wxTextCoord x, wxTextCoord y) const;
 143     virtual bool PositionToXY(wxTextPos pos,
 144                               wxTextCoord *x, wxTextCoord *y) const;
 145
 146     // wxUniv-specific: find a screen position (in client coordinates) of the
 147     // given text position or of the caret
 148     bool PositionToLogicalXY(wxTextPos pos, wxCoord *x, wxCoord *y) const;
 149     bool PositionToDeviceXY(wxTextPos pos, wxCoord *x, wxCoord *y) const;
 150     wxPoint GetCaretPosition() const;
 151
 152     virtual void ShowPosition(wxTextPos pos);
 153
 154     // Clipboard operations
 155     virtual void Copy();
 156     virtual void Cut();
 157     virtual void Paste();
 158
 159     // Undo/redo
 160     virtual void Undo();
 161     virtual void Redo();
 162
 163     virtual bool CanUndo() const;
 164     virtual bool CanRedo() const;
 165
 166     // Insertion point
 167     virtual void SetInsertionPoint(wxTextPos pos);
 168     virtual void SetInsertionPointEnd();
 169     virtual wxTextPos GetInsertionPoint() const;
 170     virtual wxTextPos GetLastPosition() const;
 171
 172     virtual void SetSelection(wxTextPos from, wxTextPos to);
 173     virtual void SetEditable(bool editable);
 174
 175     // wxUniv-specific methods
 176     // -----------------------
 177
 178     // caret stuff
 179     virtual void ShowCaret(bool show = TRUE);
 180     void HideCaret() { ShowCaret(FALSE); }
 181     void CreateCaret(); // for the current font size
 182
 183     // helpers for cursor movement
 184     wxTextPos GetWordStart() const;
 185     wxTextPos GetWordEnd() const;
 186
 187     // selection helpers
 188     bool HasSelection() const
 189         { return m_selStart != -1 && m_selEnd > m_selStart; }
 190     void ClearSelection();
 191     void RemoveSelection();
 192     wxString GetSelectionText() const;
 193
 194     virtual wxTextCtrlHitTestResult HitTest(const wxPoint& pt,
 195                                             wxTextCoord *col,
 196                                             wxTextCoord *row) const;
 197
 198     // find the character at this position in the given line, return value as
 199     // for HitTest()
 200     //
 201     // NB: x is the logical coord (client and unscrolled)
 202     wxTextCtrlHitTestResult HitTestLine(const wxString& line,
 203                                         wxCoord x,
 204                                         wxTextCoord *colOut) const;
 205
 206     // bring the given position into view
 207     void ShowHorzPosition(wxCoord pos);
 208
 209     // scroll the window horizontally so that the first character shown is in
 210     // position pos
 211     void ScrollText(wxTextCoord col);
 212
 213     // adjust the DC for horz text control scrolling too
 214     virtual void DoPrepareDC(wxDC& dc);
 215
 216     // implementation only from now on
 217     // -------------------------------
 218
 219     // override this to take into account our scrollbar-less scrolling
 220     virtual void CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const;
 221     virtual void CalcScrolledPosition(int x, int y, int *xx, int *yy) const;
 222
 223     // ensure we have correct default border
 224     virtual wxBorder GetDefaultBorder() const { return wxBORDER_SUNKEN; }
 225
 226     // perform an action
 227     virtual bool PerformAction(const wxControlAction& action,
 228                                long numArg = -1,
 229                                const wxString& strArg = wxEmptyString);
 230
 231     // override these methods to handle the caret
 232     virtual bool SetFont(const wxFont &font);
 233     virtual bool Enable(bool enable = TRUE);
 234
 235     // more readable flag testing methods
 236     bool IsPassword() const { return (GetWindowStyle() & wxTE_PASSWORD) != 0; }
 237     bool WrapLines() const
 238         { return !IsSingleLine() && !(GetWindowStyle() & wxHSCROLL); }
 239
 240     // only for wxStdTextCtrlInputHandler
 241     void RefreshSelection();
 242
 243 protected:
 244     // override base class methods
 245     virtual void DoDrawBorder(wxDC& dc, const wxRect& rect);
 246     virtual void DoDraw(wxControlRenderer *renderer);
 247
 248     // calc the size from the text extent
 249     virtual wxSize DoGetBestClientSize() const;
 250
 251     // common part of all ctors
 252     void Init();
 253
 254     // drawing
 255     // -------
 256
 257     // draw the text in the given rectangle
 258     void DoDrawTextInRect(wxDC& dc, const wxRect& rectUpdate);
 259
 260     // draw the line wrap marks in this rect
 261     void DoDrawLineWrapMarks(wxDC& dc, const wxRect& rectUpdate);
 262
 263     // line/row geometry calculations
 264     // ------------------------------
 265
 266     // get the extent (width) of the text
 267     wxCoord GetTextWidth(const wxString& text) const;
 268
 269     // get the logical text width (accounting for scrolling)
 270     wxCoord GetTotalWidth() const;
 271
 272     // get total number of rows (different from number of lines if the lines
 273     // can be wrapped)
 274     wxTextCoord GetRowCount() const;
 275
 276     // find the number of rows in this line (only if WrapLines())
 277     wxTextCoord GetRowsPerLine(wxTextCoord line) const;
 278
 279     // get the starting row of the given line
 280     wxTextCoord GetFirstRowOfLine(wxTextCoord line) const;
 281
 282     // get the row following this line
 283     wxTextCoord GetRowAfterLine(wxTextCoord line) const;
 284
 285     // refresh functions
 286     // -----------------
 287
 288     // the text area is the part of the window in which the text can be
 289     // displayed, i.e. part of it inside the margins and the real text area is
 290     // the area in which the text *is* currently displayed: for example, in the
 291     // multiline control case the text area can have extra space at the bottom
 292     // which is not tall enough for another line and which is then not included
 293     // into the real text area
 294     wxRect GetRealTextArea() const;
 295
 296     // refresh the text in the given (in logical coords) rect
 297     void RefreshTextRect(const wxRect& rect, bool textOnly = TRUE);
 298
 299     // refresh the line wrap marks for the given range of lines (inclusive)
 300     void RefreshLineWrapMarks(wxTextCoord rowFirst, wxTextCoord rowLast);
 301
 302     // refresh the text in the given range (in logical coords) of this line, if
 303     // width is 0, refresh to the end of line
 304     void RefreshPixelRange(wxTextCoord line, wxCoord start, wxCoord width);
 305
 306     // refresh the text in the given range (in text coords) in this line
 307     void RefreshColRange(wxTextCoord line, wxTextPos start, size_t count);
 308
 309     // refresh the text from in the given line range (inclusive)
 310     void RefreshLineRange(wxTextCoord lineFirst, wxTextCoord lineLast);
 311
 312     // refresh the text in the given range which can span multiple lines
 313     // (this method accepts arguments in any order)
 314     void RefreshTextRange(wxTextPos start, wxTextPos end);
 315
 316     // get the text to show: either the text itself or the text replaced with
 317     // starts for wxTE_PASSWORD control
 318     wxString GetTextToShow(const wxString& text) const;
 319
 320     // find the row in this line where the given position (counted from the
 321     // start of line) is
 322     wxTextCoord GetRowInLine(wxTextCoord line,
 323                              wxTextCoord col,
 324                              wxTextCoord *colRowStart = NULL) const;
 325
 326     // find the number of characters of a line before it wraps
 327     // (and optionally also the real width of the line)
 328     size_t GetPartOfWrappedLine(const wxChar* text,
 329                                 wxCoord *widthReal = NULL) const;
 330
 331     // get the start and end of the selection for this line: if the line is
 332     // outside the selection, both will be -1 and FALSE will be returned
 333     bool GetSelectedPartOfLine(wxTextCoord line,
 334                                wxTextPos *start, wxTextPos *end) const;
 335
 336     // update the text rect: the zone inside our client rect (its coords are
 337     // client coords) which contains the text
 338     void UpdateTextRect();
 339
 340     // calculate the last visible position
 341     void UpdateLastVisible();
 342
 343     // move caret to the given position unconditionally
 344     // (SetInsertionPoint() does nothing if the position didn't change)
 345     void DoSetInsertionPoint(wxTextPos pos);
 346
 347     // move caret to the new position without updating the display (for
 348     // internal use only)
 349     void MoveInsertionPoint(wxTextPos pos);
 350
 351     // set the caret to its initial (default) position
 352     void InitInsertionPoint();
 353
 354     // get the width of the longest line in pixels
 355     wxCoord GetMaxWidth() const;
 356
 357     // force recalculation of the max line width
 358     void RecalcMaxWidth();
 359
 360     // update the max width after the given line was modified
 361     void UpdateMaxWidth(wxTextCoord line);
 362
 363     // hit testing
 364     // -----------
 365
 366     // HitTest2() is more efficient than 2 consecutive HitTest()s with the same
 367     // line (i.e. y) and it also returns the offset of the starting position in
 368     // pixels
 369     //
 370     // as the last hack, this function accepts either logical or device (by
 371     // default) coords depending on devCoords flag
 372     wxTextCtrlHitTestResult HitTest2(wxCoord y,
 373                                      wxCoord x1,
 374                                      wxCoord x2,
 375                                      wxTextCoord *row,
 376                                      wxTextCoord *colStart,
 377                                      wxTextCoord *colEnd,
 378                                      wxTextCoord *colRowStart,
 379                                      bool devCoords = TRUE) const;
 380
 381     // HitTest() version which takes the logical text coordinates and not the
 382     // device ones
 383     wxTextCtrlHitTestResult HitTestLogical(const wxPoint& pos,
 384                                            wxTextCoord *col,
 385                                            wxTextCoord *row) const;
 386
 387     // get the line and the row in this line corresponding to the given row,
 388     // return TRUE if ok and FALSE if row is out of range
 389     //
 390     // NB: this function can only be called for controls which wrap lines
 391     bool GetLineAndRow(wxTextCoord row,
 392                        wxTextCoord *line,
 393                        wxTextCoord *rowInLine) const;
 394
 395     // get the height of one line (the same for all lines)
 396     wxCoord GetLineHeight() const
 397     {
 398         // this one should be already precalculated
 399         wxASSERT_MSG( m_heightLine != -1, _T("should have line height") );
 400
 401         return m_heightLine;
 402     }
 403
 404     // get the average char width
 405     wxCoord GetAverageWidth() const { return m_widthAvg; }
 406
 407     // recalc the line height and char width (to call when the font changes)
 408     void RecalcFontMetrics();
 409
 410     // vertical scrolling helpers
 411     // --------------------------
 412
 413     // all these functions are for multi line controls only
 414
 415     // get the number of visible lines
 416     size_t GetLinesPerPage() const;
 417
 418     // return the position above the cursor or INVALID_POS_VALUE
 419     wxTextPos GetPositionAbove();
 420
 421     // return the position below the cursor or INVALID_POS_VALUE
 422     wxTextPos GetPositionBelow();
 423
 424     // event handlers
 425     // --------------
 426     void OnChar(wxKeyEvent& event);
 427     void OnSize(wxSizeEvent& event);
 428
 429     // overrdie wxScrollHelper method to prevent (auto)scrolling beyond the end
 430     // of line
 431     virtual bool SendAutoScrollEvents(wxScrollWinEvent& event) const;
 432
 433     // return the struct containing control-type dependent data
 434     struct wxTextSingleLineData& SData() { return *m_data.sdata; }
 435     struct wxTextMultiLineData& MData() { return *m_data.mdata; }
 436     struct wxTextWrappedData& WData() { return *m_data.wdata; }
 437     const wxTextSingleLineData& SData() const { return *m_data.sdata; }
 438     const wxTextMultiLineData& MData() const { return *m_data.mdata; }
 439     const wxTextWrappedData& WData() const { return *m_data.wdata; }
 440
 441     // clipboard operations (unlike the versions without Do prefix, they have a
 442     // return code)
 443     bool DoCut();
 444     bool DoPaste();
 445
 446     // idle processing
 447     virtual void OnInternalIdle();
 448 private:
 449     // all these methods are for multiline text controls only
 450
 451     // update the scrollbars (only called from OnIdle)
 452     void UpdateScrollbars();
 453
 454     // get read only access to the lines of multiline control
 455     inline const wxArrayString& GetLines() const;
 456     inline size_t GetLineCount() const;
 457
 458     // replace a line (returns TRUE if the number of rows in thel ine changed)
 459     bool ReplaceLine(wxTextCoord line, const wxString& text);
 460
 461     // remove a line
 462     void RemoveLine(wxTextCoord line);
 463
 464     // insert a line at this position
 465     void InsertLine(wxTextCoord line, const wxString& text);
 466
 467     // calculate geometry of this line
 468     void LayoutLine(wxTextCoord line, class wxWrappedLineData& lineData) const;
 469
 470     // calculate geometry of all lines until the given one
 471     void LayoutLines(wxTextCoord lineLast) const;
 472
 473     // the initially specified control size
 474     wxSize m_sizeInitial;
 475
 476     // the global control text
 477     wxString m_value;
 478
 479     // current position
 480     wxTextPos m_curPos;
 481     wxTextCoord m_curCol,
 482                 m_curRow;
 483
 484     // last position (only used by GetLastPosition())
 485     wxTextPos m_posLast;
 486
 487     // selection
 488     wxTextPos m_selAnchor,
 489               m_selStart,
 490               m_selEnd;
 491
 492     // flags
 493     bool m_isModified:1,
 494          m_isEditable:1,
 495          m_hasCaret:1;
 496
 497     // the rectangle (in client coordinates) to draw text inside
 498     wxRect m_rectText;
 499
 500     // the height of one line (cached value of GetCharHeight)
 501     wxCoord m_heightLine;
 502
 503     // and the average char width (cached value of GetCharWidth)
 504     wxCoord m_widthAvg;
 505
 506     // we have some data which depends on the kind of control (single or multi
 507     // line)
 508     union
 509     {
 510         wxTextSingleLineData *sdata;
 511         wxTextMultiLineData *mdata;
 512         wxTextWrappedData *wdata;
 513         void *data;
 514     } m_data;
 515
 516     // the object to which we delegate our undo/redo implementation
 517     wxTextCtrlCommandProcessor *m_cmdProcessor;
 518
 519     DECLARE_EVENT_TABLE()
 520     DECLARE_DYNAMIC_CLASS(wxTextCtrl)
 521 };
 522
 523 // ----------------------------------------------------------------------------
 524 // wxStdTextCtrlInputHandler: this control handles only the mouse/kbd actions
 525 // common to Win32 and GTK, platform-specific things are implemented elsewhere
 526 // ----------------------------------------------------------------------------
 527
 528 class WXDLLEXPORT wxStdTextCtrlInputHandler : public wxStdInputHandler
 529 {
 530 public:
 531     wxStdTextCtrlInputHandler(wxInputHandler *inphand);
 532
 533     virtual bool HandleKey(wxInputConsumer *consumer,
 534                            const wxKeyEvent& event,
 535                            bool pressed);
 536     virtual bool HandleMouse(wxInputConsumer *consumer,
 537                              const wxMouseEvent& event);
 538     virtual bool HandleMouseMove(wxInputConsumer *consumer,
 539                                  const wxMouseEvent& event);
 540     virtual bool HandleFocus(wxInputConsumer *consumer, const wxFocusEvent& event);
 541
 542 protected:
 543     // get the position of the mouse click
 544     static wxTextPos HitTest(const wxTextCtrl *text, const wxPoint& pos);
 545
 546     // capture data
 547     wxTextCtrl *m_winCapture;
 548 };
 549
 550 #endif // _WX_UNIV_TEXTCTRL_H_
 551