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