textctrl.h

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///////////////////////////////////////////////////////////////////////////////
// Name:        textctrl.h
// Purpose:     wxTextCtrlBase class - the interface of wxTextCtrl
// Author:      Vadim Zeitlin
// Modified by:
// Created:     13.07.99
// RCS-ID:      $Id: textctrl.h,v 1.74 2005/06/13 12:19:15 ABX Exp $
// Copyright:   (c) Vadim Zeitlin
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_TEXTCTRL_H_BASE_
#define _WX_TEXTCTRL_H_BASE_

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma interface "textctrlbase.h"
#endif

#include "wx/defs.h"

#if wxUSE_TEXTCTRL

#include "wx/control.h"         // the base class
#include "wx/dynarray.h"        // wxArrayInt
#include "wx/gdicmn.h"          // wxPoint

// Open Watcom 1.3 does allow only ios::rdbuf() while
// we want something with streambuf parameter
// Also, can't use streambuf if making or using a DLL :-(

#if defined(__WATCOMC__) || \
    defined(__MWERKS__) || \
    (defined(__WINDOWS__) && (defined(WXUSINGDLL) || defined(WXMAKINGDLL)))
    #define wxHAS_TEXT_WINDOW_STREAM 0
#elif wxUSE_STD_IOSTREAM
    #include "wx/ioswrap.h"
    #define wxHAS_TEXT_WINDOW_STREAM 1
#else
    #define wxHAS_TEXT_WINDOW_STREAM 0
#endif

#if WXWIN_COMPATIBILITY_2_4 && !wxHAS_TEXT_WINDOW_STREAM
    // define old flag if one could use it somewhere
    #define NO_TEXT_WINDOW_STREAM
#endif

class WXDLLEXPORT wxTextCtrl;
class WXDLLEXPORT wxTextCtrlBase;

// ----------------------------------------------------------------------------
// wxTextCtrl types
// ----------------------------------------------------------------------------

// wxTextPos is the position in the text
typedef long wxTextPos;

// wxTextCoord is the line or row number (which should have been unsigned but
// is long for backwards compatibility)
typedef long wxTextCoord;

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

extern WXDLLEXPORT_DATA(const wxChar*) wxTextCtrlNameStr;

// this is intentionally not enum to avoid warning fixes with
// typecasting from enum type to wxTextCoord
const wxTextCoord wxOutOfRangeTextCoord = -1;
const wxTextCoord wxInvalidTextCoord    = -2;

// ----------------------------------------------------------------------------
// wxTextCtrl style flags
// ----------------------------------------------------------------------------

// the flag bit 0x0001 s free but should be used only for the things which
// don't make sense for a text control used by wxTextEntryDialog because they
// would otherwise conflict with wxOK, wxCANCEL, wxCENTRE

#define wxTE_NO_VSCROLL     0x0002
#define wxTE_AUTO_SCROLL    0x0008

#define wxTE_READONLY       0x0010
#define wxTE_MULTILINE      0x0020
#define wxTE_PROCESS_TAB    0x0040

// alignment flags
#define wxTE_LEFT           0x0000                    // 0x0000
#define wxTE_CENTER         wxALIGN_CENTER_HORIZONTAL // 0x0100
#define wxTE_RIGHT          wxALIGN_RIGHT             // 0x0200
#define wxTE_CENTRE         wxTE_CENTER

// this style means to use RICHEDIT control and does something only under wxMSW
// and Win32 and is silently ignored under all other platforms
#define wxTE_RICH           0x0080

#define wxTE_PROCESS_ENTER  0x0400
#define wxTE_PASSWORD       0x0800

// automatically detect the URLs and generate the events when mouse is
// moved/clicked over an URL
//
// this is for Win32 richedit and wxGTK2 multiline controls only so far
#define wxTE_AUTO_URL       0x1000

// by default, the Windows text control doesn't show the selection when it
// doesn't have focus - use this style to force it to always show it
#define wxTE_NOHIDESEL      0x2000

// use wxHSCROLL to not wrap text at all, wxTE_CHARWRAP to wrap it at any
// position and wxTE_WORDWRAP to wrap at words boundary
//
// if no wrapping style is given at all, the control wraps at word boundary
#define wxTE_DONTWRAP       wxHSCROLL
#define wxTE_CHARWRAP       0x4000  // wrap at any position
#define wxTE_WORDWRAP       0x0001  // wrap only at words boundaries
#define wxTE_BESTWRAP       0x0000  // this is the default

// obsolete synonym
#define wxTE_LINEWRAP       wxTE_CHARWRAP

// force using RichEdit version 2.0 or 3.0 instead of 1.0 (default) for
// wxTE_RICH controls - can be used together with or instead of wxTE_RICH
#define wxTE_RICH2          0x8000

// reuse wxTE_RICH2's value for CAPEDIT control on Windows CE
#if defined(__SMARTPHONE__) || defined(__POCKETPC__)
#define wxTE_CAPITALIZE     wxTE_RICH2
#else
#define wxTE_CAPITALIZE     0
#endif

// ----------------------------------------------------------------------------
// wxTextCtrl::HitTest return values
// ----------------------------------------------------------------------------

// the point asked is ...
enum wxTextCtrlHitTestResult
{
    wxTE_HT_UNKNOWN = -2,   // this means HitTest() is simply not implemented
    wxTE_HT_BEFORE,         // either to the left or upper
    wxTE_HT_ON_TEXT,        // directly on
    wxTE_HT_BELOW,          // below [the last line]
    wxTE_HT_BEYOND          // after [the end of line]
};
// ... the character returned

// ----------------------------------------------------------------------------
// Types for wxTextAttr
// ----------------------------------------------------------------------------

// Alignment

enum wxTextAttrAlignment
{
    wxTEXT_ALIGNMENT_DEFAULT,
    wxTEXT_ALIGNMENT_LEFT,
    wxTEXT_ALIGNMENT_CENTRE,
    wxTEXT_ALIGNMENT_CENTER = wxTEXT_ALIGNMENT_CENTRE,
    wxTEXT_ALIGNMENT_RIGHT,
    wxTEXT_ALIGNMENT_JUSTIFIED
};

// Flags to indicate which attributes are being applied

#define wxTEXT_ATTR_TEXT_COLOUR             0x0001
#define wxTEXT_ATTR_BACKGROUND_COLOUR       0x0002
#define wxTEXT_ATTR_FONT_FACE               0x0004
#define wxTEXT_ATTR_FONT_SIZE               0x0008
#define wxTEXT_ATTR_FONT_WEIGHT             0x0010
#define wxTEXT_ATTR_FONT_ITALIC             0x0020
#define wxTEXT_ATTR_FONT_UNDERLINE          0x0040
#define wxTEXT_ATTR_FONT \
  ( wxTEXT_ATTR_FONT_FACE | wxTEXT_ATTR_FONT_SIZE | wxTEXT_ATTR_FONT_WEIGHT | \
    wxTEXT_ATTR_FONT_ITALIC | wxTEXT_ATTR_FONT_UNDERLINE )
#define wxTEXT_ATTR_ALIGNMENT               0x0080
#define wxTEXT_ATTR_LEFT_INDENT             0x0100
#define wxTEXT_ATTR_RIGHT_INDENT            0x0200
#define wxTEXT_ATTR_TABS                    0x0400

// ----------------------------------------------------------------------------
// wxTextAttr: a structure containing the visual attributes of a text
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxTextAttr
{
public:
    // ctors
    wxTextAttr() { Init(); }
    wxTextAttr(const wxColour& colText,
               const wxColour& colBack = wxNullColour,
               const wxFont& font = wxNullFont,
               wxTextAttrAlignment alignment = wxTEXT_ALIGNMENT_DEFAULT);

    // operations
    void Init();

    // operators
    void operator= (const wxTextAttr& attr);

    // setters
    void SetTextColour(const wxColour& colText) { m_colText = colText; m_flags |= wxTEXT_ATTR_TEXT_COLOUR; }
    void SetBackgroundColour(const wxColour& colBack) { m_colBack = colBack; m_flags |= wxTEXT_ATTR_BACKGROUND_COLOUR; }
    void SetFont(const wxFont& font, long flags = wxTEXT_ATTR_FONT) { m_font = font; m_flags |= flags; }
    void SetAlignment(wxTextAttrAlignment alignment) { m_textAlignment = alignment; m_flags |= wxTEXT_ATTR_ALIGNMENT; }
    void SetTabs(const wxArrayInt& tabs) { m_tabs = tabs; m_flags |= wxTEXT_ATTR_TABS; }
    void SetLeftIndent(int indent, int subIndent = 0) { m_leftIndent = indent; m_leftSubIndent = subIndent; m_flags |= wxTEXT_ATTR_LEFT_INDENT; }
    void SetRightIndent(int indent) { m_rightIndent = indent; m_flags |= wxTEXT_ATTR_RIGHT_INDENT; }
    void SetFlags(long flags) { m_flags = flags; }

    // accessors
    bool HasTextColour() const { return m_colText.Ok() && HasFlag(wxTEXT_ATTR_TEXT_COLOUR) ; }
    bool HasBackgroundColour() const { return m_colBack.Ok() && HasFlag(wxTEXT_ATTR_BACKGROUND_COLOUR) ; }
    bool HasFont() const { return m_font.Ok() && HasFlag(wxTEXT_ATTR_FONT) ; }
    bool HasAlignment() const { return (m_textAlignment != wxTEXT_ALIGNMENT_DEFAULT) || ((m_flags & wxTEXT_ATTR_ALIGNMENT) != 0) ; }
    bool HasTabs() const { return (m_flags & wxTEXT_ATTR_TABS) != 0 ; }
    bool HasLeftIndent() const { return (m_flags & wxTEXT_ATTR_LEFT_INDENT) != 0 ; }
    bool HasRightIndent() const { return (m_flags & wxTEXT_ATTR_RIGHT_INDENT) != 0 ; }
    bool HasFlag(long flag) const { return (m_flags & flag) != 0; }

    const wxColour& GetTextColour() const { return m_colText; }
    const wxColour& GetBackgroundColour() const { return m_colBack; }
    const wxFont& GetFont() const { return m_font; }
    wxTextAttrAlignment GetAlignment() const { return m_textAlignment; }
    const wxArrayInt& GetTabs() const { return m_tabs; }
    long GetLeftIndent() const { return m_leftIndent; }
    long GetLeftSubIndent() const { return m_leftSubIndent; }
    long GetRightIndent() const { return m_rightIndent; }
    long GetFlags() const { return m_flags; }

    // returns false if we have any attributes set, true otherwise
    bool IsDefault() const
    {
        return !HasTextColour() && !HasBackgroundColour() && !HasFont() && !HasAlignment() &&
               !HasTabs() && !HasLeftIndent() && !HasRightIndent() ;
    }

    // return the attribute having the valid font and colours: it uses the
    // attributes set in attr and falls back first to attrDefault and then to
    // the text control font/colours for those attributes which are not set
    static wxTextAttr Combine(const wxTextAttr& attr,
                              const wxTextAttr& attrDef,
                              const wxTextCtrlBase *text);

private:
    long                m_flags;
    wxColour            m_colText,
                        m_colBack;
    wxFont              m_font;
    wxTextAttrAlignment m_textAlignment;
    wxArrayInt          m_tabs; // array of int: tab stops in 1/10 mm
    int                 m_leftIndent; // left indent in 1/10 mm
    int                 m_leftSubIndent; // left indent for all but the first
                                         // line in a paragraph relative to the
                                         // first line, in 1/10 mm
    int                 m_rightIndent; // right indent in 1/10 mm
};

// ----------------------------------------------------------------------------
// wxTextCtrl: a single or multiple line text zone where user can enter and
// edit text
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxTextCtrlBase : public wxControl
#if wxHAS_TEXT_WINDOW_STREAM
                                 , public wxSTD streambuf
#endif

{
public:
    // creation
    // --------