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ddab9f80c8976a0d01906788c197ac1be2b08675
wxWidgets/src/msw/textctrl.cpp
Robin Dunn ddab9f80c8 changed Replace and Remove to always use EM_REPLACESEL instead of 
going through the clipboard


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11254 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2001-08-02 02:34:44 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: msw/textctrl.cpp
// Purpose: wxTextCtrl
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Julian Smart and Markus Holzem
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
#ifdef __GNUG__
#pragma implementation "textctrl.h"
#endif
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_TEXTCTRL
#ifndef WX_PRECOMP
#include "wx/textctrl.h"
#include "wx/settings.h"
#include "wx/brush.h"
#include "wx/utils.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/app.h"
#endif
#include "wx/module.h"
#if wxUSE_CLIPBOARD
#include "wx/clipbrd.h"
#endif
#include "wx/textfile.h"
#include <windowsx.h>
#include "wx/msw/private.h"
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#if wxUSE_RICHEDIT && (!defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__))
#include <richedit.h>
#endif
// old mingw32 doesn't define this
#ifndef CFM_CHARSET
#define CFM_CHARSET 0x08000000
#endif // CFM_CHARSET
#ifndef CFM_BACKCOLOR
#define CFM_BACKCOLOR 0x04000000
#endif
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
#if wxUSE_RICHEDIT
// this module initializes RichEdit DLL if needed
class wxRichEditModule : public wxModule
{
public:
virtual bool OnInit();
virtual void OnExit();
// get the version currently loaded, -1 if none
static int GetLoadedVersion() { return ms_verRichEdit; }
// load the richedit DLL of at least of required version
static bool Load(int version = 1);
private:
// the handle to richedit DLL and the version of the DLL loaded
static HINSTANCE ms_hRichEdit;
// the DLL version loaded or -1 if none
static int ms_verRichEdit;
DECLARE_DYNAMIC_CLASS(wxRichEditModule)
};
HINSTANCE wxRichEditModule::ms_hRichEdit = (HINSTANCE)NULL;
int wxRichEditModule::ms_verRichEdit = -1;
IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
#endif // wxUSE_RICHEDIT
// ----------------------------------------------------------------------------
// event tables and other macros
// ----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
EVT_CHAR(wxTextCtrl::OnChar)
EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
#ifdef __WIN16__
EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
#endif
END_EVENT_TABLE()
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// creation
// ----------------------------------------------------------------------------
wxTextCtrl::wxTextCtrl()
{
#if wxUSE_RICHEDIT
m_isRich = FALSE;
#endif
}
bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
const wxString& value,
const wxPoint& pos,
const wxSize& size,
long style,
const wxValidator& validator,
const wxString& name)
{
// base initialization
if ( !CreateBase(parent, id, pos, size, style, validator, name) )
return FALSE;
if ( parent )
parent->AddChild(this);
// translate wxWin style flags to MSW ones, checking for consistency while
// doing it
long msStyle = ES_LEFT | WS_VISIBLE | WS_CHILD | WS_TABSTOP;
if ( m_windowStyle & wxCLIP_SIBLINGS )
msStyle |= WS_CLIPSIBLINGS;
if ( m_windowStyle & wxTE_MULTILINE )
{
wxASSERT_MSG( !(m_windowStyle & wxTE_PROCESS_ENTER),
wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
msStyle |= ES_MULTILINE | ES_WANTRETURN;
if ((m_windowStyle & wxTE_NO_VSCROLL) == 0)
msStyle |= WS_VSCROLL;
m_windowStyle |= wxTE_PROCESS_ENTER;
}
else
msStyle |= ES_AUTOHSCROLL;
if (m_windowStyle & wxHSCROLL)
msStyle |= (WS_HSCROLL | ES_AUTOHSCROLL);
if (m_windowStyle & wxTE_READONLY)
msStyle |= ES_READONLY;
if (m_windowStyle & wxTE_PASSWORD) // hidden input
msStyle |= ES_PASSWORD;
if (m_windowStyle & wxTE_AUTO_SCROLL)
msStyle |= ES_AUTOHSCROLL;
// we always want the characters and the arrows
m_lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
// we may have several different cases:
// 1. normal case: both TAB and ENTER are used for dialog navigation
// 2. ctrl which wants TAB for itself: ENTER is used to pass to the next
// control in the dialog
// 3. ctrl which wants ENTER for itself: TAB is used for dialog navigation
// 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to pass to
// the next control
if ( m_windowStyle & wxTE_PROCESS_ENTER )
m_lDlgCode |= DLGC_WANTMESSAGE;
if ( m_windowStyle & wxTE_PROCESS_TAB )
m_lDlgCode |= DLGC_WANTTAB;
// do create the control - either an EDIT or RICHEDIT
wxString windowClass = wxT("EDIT");
#if wxUSE_RICHEDIT
if ( m_windowStyle & wxTE_RICH )
{
static bool s_errorGiven = FALSE; // MT-FIXME
// only give the error msg once if the DLL can't be loaded
if ( !s_errorGiven )
{
// first try to load the RichEdit DLL (will do nothing if already
// done)
if ( !wxRichEditModule::Load() )
{
wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
s_errorGiven = TRUE;
}
}
if ( s_errorGiven )
{
m_isRich = FALSE;
}
else
{
msStyle |= ES_AUTOVSCROLL;
m_isRich = TRUE;
int ver = wxRichEditModule::GetLoadedVersion();
if ( ver == 1 )
{
windowClass = wxT("RICHEDIT");
}
else
{
#ifndef RICHEDIT_CLASS
wxString RICHEDIT_CLASS;
RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), ver);
#if wxUSE_UNICODE
RICHEDIT_CLASS += _T('W');
#else // ANSI
RICHEDIT_CLASS += _T('A');
#endif // Unicode/ANSI
#endif // !RICHEDIT_CLASS
windowClass = RICHEDIT_CLASS;
}
}
}
else
m_isRich = FALSE;
#endif // wxUSE_RICHEDIT
bool want3D;
WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
// Even with extended styles, need to combine with WS_BORDER for them to
// look right.
if ( want3D || wxStyleHasBorder(m_windowStyle) )
msStyle |= WS_BORDER;
// NB: don't use pos and size as CreateWindowEx arguments because they
// might be -1 in which case we should use the default values (and
// SetSize called below takes care of it)
m_hWnd = (WXHWND)::CreateWindowEx(exStyle,
windowClass.c_str(),
NULL,
msStyle,
0, 0, 0, 0,
GetHwndOf(parent),
(HMENU)m_windowId,
wxGetInstance(),
NULL);
wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create text ctrl") );
#if wxUSE_CTL3D
if ( want3D )
{
Ctl3dSubclassCtl(GetHwnd());
m_useCtl3D = TRUE;
}
#endif
#if wxUSE_RICHEDIT
if (m_isRich)
{
// have to enable events manually
LPARAM mask = ENM_CHANGE | ENM_DROPFILES | ENM_SELCHANGE | ENM_UPDATE;
if ( m_windowStyle & wxTE_AUTO_URL )
{
mask |= ENM_LINK;
::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
}
::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
}
#endif // wxUSE_RICHEDIT
SubclassWin(GetHWND());
// set font, position, size and initial value
wxFont& fontParent = parent->GetFont();
if ( fontParent.Ok() )
{
SetFont(fontParent);
}
else
{
SetFont(wxSystemSettings::GetSystemFont(wxSYS_SYSTEM_FONT));
}
// Causes a crash for Symantec C++ and WIN32 for some reason
#if !(defined(__SC__) && defined(__WIN32__))
if ( !value.IsEmpty() )
{
SetValue(value);
}
#endif
// set colours
SetupColours();
SetSize(pos.x, pos.y, size.x, size.y);
return TRUE;
}
// Make sure the window style (etc.) reflects the HWND style (roughly)
void wxTextCtrl::AdoptAttributesFromHWND()
{
wxWindow::AdoptAttributesFromHWND();
HWND hWnd = GetHwnd();
long style = GetWindowLong(hWnd, GWL_STYLE);
// retrieve the style to see whether this is an edit or richedit ctrl
#if wxUSE_RICHEDIT
wxChar buf[256];
GetClassName(hWnd, buf, WXSIZEOF(buf));
if ( wxStricmp(buf, wxT("EDIT")) == 0 )
m_isRich = FALSE;
else
m_isRich = TRUE;
#endif // wxUSE_RICHEDIT
if (style & ES_MULTILINE)
m_windowStyle |= wxTE_MULTILINE;
if (style & ES_PASSWORD)
m_windowStyle |= wxTE_PASSWORD;
if (style & ES_READONLY)
m_windowStyle |= wxTE_READONLY;
if (style & ES_WANTRETURN)
m_windowStyle |= wxTE_PROCESS_ENTER;
}
void wxTextCtrl::SetupColours()
{
wxColour bkgndColour;
// if (IsEditable() || (m_windowStyle & wxTE_MULTILINE))
bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
// else
// bkgndColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
SetBackgroundColour(bkgndColour);
SetForegroundColour(GetParent()->GetForegroundColour());
}
// ----------------------------------------------------------------------------
// set/get the controls text
// ----------------------------------------------------------------------------
wxString wxTextCtrl::GetValue() const
{
// we can't use wxGetWindowText() (i.e. WM_GETTEXT internally) for
// retrieving more than 64Kb under Win9x
#if wxUSE_RICHEDIT
if ( m_isRich )
{
wxString str;
int len = GetWindowTextLength(GetHwnd());
if ( len )
{
// alloc one extra WORD as needed by the control
wxChar *p = str.GetWriteBuf(++len);
TEXTRANGE textRange;
textRange.chrg.cpMin = 0;
textRange.chrg.cpMax = -1;
textRange.lpstrText = p;
(void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
// believe it or not, but EM_GETTEXTRANGE uses just CR ('\r') for
// the newlines which is neither Unix nor Windows style (Win95 with
// riched20.dll shows this behaviour) - convert it to something
// reasonable
for ( ; *p; p++ )
{
if ( *p == _T('\r') )
*p = _T('\n');
}
str.UngetWriteBuf();
}
//else: no text at all, leave the string empty
return str;
}
#endif // wxUSE_RICHEDIT
// WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
// same one as above for consitency
wxString str = wxGetWindowText(GetHWND());
return wxTextFile::Translate(str, wxTextFileType_Unix);
}
void wxTextCtrl::SetValue(const wxString& value)
{
// if the text is long enough, it's faster to just set it instead of first
// comparing it with the old one (chances are that it will be different
// anyhow, this comparison is there to avoid flicker for small single-line
// edit controls mostly)
if ( (value.length() > 0x400) || (value != GetValue()) )
{
wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
SetWindowText(GetHwnd(), valueDos.c_str());
// for compatibility with the GTK and because it is more logical, we
// move the cursor to the end of the text after SetValue()
// GRG, Jun/2000: Changed this back after a lot of discussion
// in the lists. wxWindows 2.2 will have a set of flags to
// customize this behaviour.
//SetInsertionPointEnd();
AdjustSpaceLimit();
}
}
void wxTextCtrl::WriteText(const wxString& value)
{
wxString valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
#if wxUSE_RICHEDIT
// ensure that the new text will be in the default style
if ( IsRich() &&
(m_defaultStyle.HasFont() || m_defaultStyle.HasTextColour()) )
{
long start, end;
GetSelection(&start, &end);
SetStyle(start, end, m_defaultStyle );
}
#endif // wxUSE_RICHEDIT
SendMessage(GetHwnd(), EM_REPLACESEL, 0, (LPARAM)valueDos.c_str());
AdjustSpaceLimit();
}
void wxTextCtrl::AppendText(const wxString& text)
{
SetInsertionPointEnd();
WriteText(text);
}
void wxTextCtrl::Clear()
{
SetWindowText(GetHwnd(), wxT(""));
}
// ----------------------------------------------------------------------------
// Clipboard operations
// ----------------------------------------------------------------------------
void wxTextCtrl::Copy()
{
if (CanCopy())
{
HWND hWnd = GetHwnd();
SendMessage(hWnd, WM_COPY, 0, 0L);
}
}
void wxTextCtrl::Cut()
{
if (CanCut())
{
HWND hWnd = GetHwnd();
SendMessage(hWnd, WM_CUT, 0, 0L);
}
}
void wxTextCtrl::Paste()
{
if (CanPaste())
{
HWND hWnd = GetHwnd();
SendMessage(hWnd, WM_PASTE, 0, 0L);
}
}
bool wxTextCtrl::CanCopy() const
{
// Can copy if there's a selection
long from, to;
GetSelection(& from, & to);
return (from != to) ;
}
bool wxTextCtrl::CanCut() const
{
// Can cut if there's a selection
long from, to;
GetSelection(& from, & to);
return (from != to) && (IsEditable());
}
bool wxTextCtrl::CanPaste() const
{
#if wxUSE_RICHEDIT
if (m_isRich)
{
int dataFormat = 0; // 0 == any format
return (::SendMessage( GetHwnd(), EM_CANPASTE, (WPARAM) (UINT) dataFormat, 0) != 0);
}
#endif
if (!IsEditable())
return FALSE;
// Standard edit control: check for straight text on clipboard
bool isTextAvailable = FALSE;
if ( ::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
{
isTextAvailable = (::IsClipboardFormatAvailable(CF_TEXT) != 0);
::CloseClipboard();
}
return isTextAvailable;
}
// ----------------------------------------------------------------------------
// Accessors
// ----------------------------------------------------------------------------
void wxTextCtrl::SetEditable(bool editable)
{
HWND hWnd = GetHwnd();
SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
}
void wxTextCtrl::SetInsertionPoint(long pos)
{
HWND hWnd = GetHwnd();
#ifdef __WIN32__
#if wxUSE_RICHEDIT
if ( m_isRich)
{
CHARRANGE range;
range.cpMin = pos;
range.cpMax = pos;
SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
}
else
#endif // wxUSE_RICHEDIT
{
SendMessage(hWnd, EM_SETSEL, pos, pos);
SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
}
#else // Win16
SendMessage(hWnd, EM_SETSEL, 0, MAKELPARAM(pos, pos));
#endif // Win32/16
static const wxChar *nothing = _T("");
SendMessage(hWnd, EM_REPLACESEL, 0, (LPARAM)nothing);
}
void wxTextCtrl::SetInsertionPointEnd()
{
long pos = GetLastPosition();
SetInsertionPoint(pos);
}
long wxTextCtrl::GetInsertionPoint() const
{
#if wxUSE_RICHEDIT
if (m_isRich)
{
CHARRANGE range;
range.cpMin = 0;
range.cpMax = 0;
SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
return range.cpMin;
}
#endif
DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
return Pos & 0xFFFF;
}
long wxTextCtrl::GetLastPosition() const
{
HWND hWnd = GetHwnd();
// Will always return a number > 0 (according to docs)
int noLines = (int)SendMessage(hWnd, EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0L);
// This gets the char index for the _beginning_ of the last line
int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)(noLines-1), (LPARAM)0L);
// Get number of characters in the last line. We'll add this to the character
// index for the last line, 1st position.
int lineLength = (int)SendMessage(hWnd, EM_LINELENGTH, (WPARAM)charIndex, (LPARAM)0L);
return (long)(charIndex + lineLength);
}
// If the return values from and to are the same, there is no
// selection.
void wxTextCtrl::GetSelection(long* from, long* to) const
{
#if wxUSE_RICHEDIT
if (m_isRich)
{
CHARRANGE charRange;
::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) (CHARRANGE*) & charRange);
*from = charRange.cpMin;
*to = charRange.cpMax;
}
else
#endif // rich/!rich
{
DWORD dwStart, dwEnd;
WPARAM wParam = (WPARAM) &dwStart; // receives starting position
LPARAM lParam = (LPARAM) &dwEnd; // receives ending position
::SendMessage(GetHwnd(), EM_GETSEL, wParam, lParam);
*from = dwStart;
*to = dwEnd;
}
}
bool wxTextCtrl::IsEditable() const
{
long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
return ((style & ES_READONLY) == 0);
}
// ----------------------------------------------------------------------------
// Editing
// ----------------------------------------------------------------------------
void wxTextCtrl::Replace(long from, long to, const wxString& value)
{
HWND hWnd = GetHwnd();
long fromChar = from;
long toChar = to;
// Set selection and remove it
#ifdef __WIN32__
SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)value.c_str());
#else
SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)value.c_str());
#endif
}
void wxTextCtrl::Remove(long from, long to)
{
HWND hWnd = GetHwnd();
long fromChar = from;
long toChar = to;
// Cut all selected text
#ifdef __WIN32__
SendMessage(hWnd, EM_SETSEL, fromChar, toChar);
SendMessage(hWnd, EM_REPLACESEL, (WPARAM)TRUE, (LPARAM)"");
#else
SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
SendMessage(hWnd, EM_REPLACESEL, (WPARAM)0, (LPARAM)"");
#endif
}
void wxTextCtrl::SetSelection(long from, long to)
{
HWND hWnd = GetHwnd();
long fromChar = from;
long toChar = to;
// if from and to are both -1, it means (in wxWindows) that all text should
// be selected. Translate into Windows convention
if ((from == -1) && (to == -1))
{
fromChar = 0;
toChar = -1;
}
#ifdef __WIN32__
SendMessage(hWnd, EM_SETSEL, (WPARAM)fromChar, (LPARAM)toChar);
SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
#else
// WPARAM is 0: selection is scrolled into view
SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(fromChar, toChar));
#endif
}
bool wxTextCtrl::LoadFile(const wxString& file)
{
if ( wxTextCtrlBase::LoadFile(file) )
{
// update the size limit if needed
AdjustSpaceLimit();
return TRUE;
}
return FALSE;
}
bool wxTextCtrl::IsModified() const
{
return (SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0);
}
// Makes 'unmodified'
void wxTextCtrl::DiscardEdits()
{
SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
}
int wxTextCtrl::GetNumberOfLines() const
{
return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
}
long wxTextCtrl::XYToPosition(long x, long y) const
{
HWND hWnd = GetHwnd();
// This gets the char index for the _beginning_ of this line
int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
return (long)(x + charIndex);
}
bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
{
HWND hWnd = GetHwnd();
// This gets the line number containing the character
int lineNo;
#if wxUSE_RICHEDIT
if ( m_isRich )
{
lineNo = (int)SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
}
else
#endif // wxUSE_RICHEDIT
lineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
if ( lineNo == -1 )
{
// no such line
return FALSE;
}
// This gets the char index for the _beginning_ of this line
int charIndex = (int)SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
if ( charIndex == -1 )
{
return FALSE;
}
// The X position must therefore be the different between pos and charIndex
if ( x )
*x = (long)(pos - charIndex);
if ( y )
*y = (long)lineNo;
return TRUE;
}
void wxTextCtrl::ShowPosition(long pos)
{
HWND hWnd = GetHwnd();
// To scroll to a position, we pass the number of lines and characters
// to scroll *by*. This means that we need to:
// (1) Find the line position of the current line.
// (2) Find the line position of pos.
// (3) Scroll by (pos - current).
// For now, ignore the horizontal scrolling.
// Is this where scrolling is relative to - the line containing the caret?
// Or is the first visible line??? Try first visible line.
// int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
int linesToScroll = specifiedLineLineNo - currentLineLineNo;
if (linesToScroll != 0)
(void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
}
int wxTextCtrl::GetLineLength(long lineNo) const
{
long charIndex = XYToPosition(0, lineNo);
int len = (int)SendMessage(GetHwnd(), EM_LINELENGTH, charIndex, 0);
return len;
}
wxString wxTextCtrl::GetLineText(long lineNo) const
{
size_t len = (size_t)GetLineLength(lineNo) + 1;
// there must be at least enough place for the length WORD in the
// buffer
len += sizeof(WORD);
wxString str;
wxChar *buf = str.GetWriteBuf(len);
*(WORD *)buf = (WORD)len;
len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
buf[len] = 0;
str.UngetWriteBuf(len);
return str;
}
// ----------------------------------------------------------------------------
// Undo/redo
// ----------------------------------------------------------------------------
void wxTextCtrl::Undo()
{
if (CanUndo())
{
::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
}
}
void wxTextCtrl::Redo()
{
if (CanRedo())
{
// Same as Undo, since Undo undoes the undo, i.e. a redo.
::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
}
}
bool wxTextCtrl::CanUndo() const
{
return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
}
bool wxTextCtrl::CanRedo() const
{
return (::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0);
}
// ----------------------------------------------------------------------------
// implemenation details
// ----------------------------------------------------------------------------
void wxTextCtrl::Command(wxCommandEvent & event)
{
SetValue(event.GetString());
ProcessCommand (event);
}
void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
{
// By default, load the first file into the text window.
if (event.GetNumberOfFiles() > 0)
{
LoadFile(event.GetFiles()[0]);
}
}
void wxTextCtrl::OnChar(wxKeyEvent& event)
{
switch ( event.KeyCode() )
{
case WXK_RETURN:
if ( !(m_windowStyle & wxTE_MULTILINE) )
{
wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
InitCommandEvent(event);
event.SetString(GetValue());
if ( GetEventHandler()->ProcessEvent(event) )
return;
}
//else: multiline controls need Enter for themselves
break;
case WXK_TAB:
// always produce navigation event - even if we process TAB
// ourselves the fact that we got here means that the user code
// decided to skip processing of this TAB - probably to let it
// do its default job.
{
wxNavigationKeyEvent eventNav;
eventNav.SetDirection(!event.ShiftDown());
eventNav.SetWindowChange(event.ControlDown());
eventNav.SetEventObject(this);
if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
return;
}
break;
}
// no, we didn't process it
event.Skip();
}
bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
switch (param)
{
case EN_SETFOCUS:
case EN_KILLFOCUS:
{
wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
: wxEVT_SET_FOCUS,
m_windowId);
event.SetEventObject( this );
GetEventHandler()->ProcessEvent(event);
}
break;
case EN_CHANGE:
{
wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, m_windowId);
InitCommandEvent(event);
event.SetString(GetValue());
ProcessCommand(event);
}
break;
case EN_MAXTEXT:
// the text size limit has been hit - increase it
AdjustSpaceLimit();
break;
// the other notification messages are not processed
case EN_UPDATE:
case EN_ERRSPACE:
case EN_HSCROLL:
case EN_VSCROLL:
return FALSE;
default:
return FALSE;
}
// processed
return TRUE;
}
WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
#if wxUSE_CTL3D
WXUINT message,
WXWPARAM wParam,
WXLPARAM lParam
#else
WXUINT WXUNUSED(message),
WXWPARAM WXUNUSED(wParam),
WXLPARAM WXUNUSED(lParam)
#endif
)
{
#if wxUSE_CTL3D
if ( m_useCtl3D )
{
HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
return (WXHBRUSH) hbrush;
}
#endif // wxUSE_CTL3D
HDC hdc = (HDC)pDC;
if (GetParent()->GetTransparentBackground())
SetBkMode(hdc, TRANSPARENT);
else
SetBkMode(hdc, OPAQUE);
wxColour colBack = GetBackgroundColour();
if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
colBack = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
::SetBkColor(hdc, wxColourToRGB(colBack));
::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
return (WXHBRUSH)brush->GetResourceHandle();
}
// In WIN16, need to override normal erasing because
// Ctl3D doesn't use the wxWindows background colour.
#ifdef __WIN16__
void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
{
wxColour col(m_backgroundColour);
#if wxUSE_CTL3D
if (m_useCtl3D)
col = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW);
#endif
RECT rect;
::GetClientRect(GetHwnd(), &rect);
COLORREF ref = PALETTERGB(col.Red(),
col.Green(),
col.Blue());
HBRUSH hBrush = ::CreateSolidBrush(ref);
if ( !hBrush )
wxLogLastError(wxT("CreateSolidBrush"));
HDC hdc = (HDC)event.GetDC()->GetHDC();
int mode = ::SetMapMode(hdc, MM_TEXT);
::FillRect(hdc, &rect, hBrush);
::DeleteObject(hBrush);
::SetMapMode(hdc, mode);
}
#endif
void wxTextCtrl::AdjustSpaceLimit()
{
#ifndef __WIN16__
unsigned int len = ::GetWindowTextLength(GetHwnd()),
limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
if ( len >= limit )
{
limit = len + 0x8000; // 32Kb
#if wxUSE_RICHEDIT
if ( m_isRich )
{
// as a nice side effect, this also allows passing limit > 64Kb
::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
}
else
#endif // wxUSE_RICHEDIT
{
if ( limit > 0xffff )
{
// this will set it to a platform-dependent maximum (much more
// than 64Kb under NT)
limit = 0;
}
::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
}
}
#endif // !Win16
}
bool wxTextCtrl::AcceptsFocus() const
{
// we don't want focus if we can't be edited
return IsEditable() && wxControl::AcceptsFocus();
}
wxSize wxTextCtrl::DoGetBestSize() const
{
int cx, cy;
wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
int wText = DEFAULT_ITEM_WIDTH;
int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
if ( m_windowStyle & wxTE_MULTILINE )
{
hText *= wxMax(GetNumberOfLines(), 5);
}
//else: for single line control everything is ok
return wxSize(wText, hText);
}
// ----------------------------------------------------------------------------
// standard handlers for standard edit menu events
// ----------------------------------------------------------------------------
void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
{
Cut();
}
void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
{
Copy();
}
void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
{
Paste();
}
void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
{
Undo();
}
void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
{
Redo();
}
void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
{
event.Enable( CanCut() );
}
void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
{
event.Enable( CanCopy() );
}
void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
{
event.Enable( CanPaste() );
}
void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
{
event.Enable( CanUndo() );
}
void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
{
event.Enable( CanRedo() );
}
// the rest of the file only deals with the rich edit controls
#if wxUSE_RICHEDIT
// ----------------------------------------------------------------------------
// EN_LINK processing
// ----------------------------------------------------------------------------
bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
{
NMHDR *hdr = (NMHDR* )lParam;
if ( hdr->code == EN_LINK )
{
ENLINK *enlink = (ENLINK *)hdr;
switch ( enlink->msg )
{
case WM_SETCURSOR:
// ok, so it is hardcoded - do we really nee to customize it?
::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
*result = TRUE;
break;
case WM_MOUSEMOVE:
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_LBUTTONDBLCLK:
case WM_RBUTTONDOWN:
case WM_RBUTTONUP:
case WM_RBUTTONDBLCLK:
// send a mouse event
{
static const wxEventType eventsMouse[] =
{
wxEVT_MOTION,
wxEVT_LEFT_DOWN,
wxEVT_LEFT_UP,
wxEVT_LEFT_DCLICK,
wxEVT_RIGHT_DOWN,
wxEVT_RIGHT_UP,
wxEVT_RIGHT_DCLICK,
};
// the event ids are consecutive
wxMouseEvent
evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
InitMouseEvent(evtMouse,
GET_X_LPARAM(enlink->lParam),
GET_Y_LPARAM(enlink->lParam),
enlink->wParam);
wxTextUrlEvent event(m_windowId, evtMouse,
enlink->chrg.cpMin,
enlink->chrg.cpMax);
InitCommandEvent(event);
*result = ProcessCommand(event);
}
break;
}
return TRUE;
}
// not processed
return FALSE;
}
// ----------------------------------------------------------------------------
// colour setting for the rich edit controls
// ----------------------------------------------------------------------------
// Watcom C++ doesn't define this
#ifndef SCF_ALL
#define SCF_ALL 0x0004
#endif
bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
{
if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
{
// colour didn't really change
return FALSE;
}
if ( IsRich() )
{
// rich edit doesn't use WM_CTLCOLOR, hence we need to send
// EM_SETBKGNDCOLOR additionally
::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
}
return TRUE;
}
bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
{
if ( !wxTextCtrlBase::SetForegroundColour(colour) )
{
// colour didn't really change
return FALSE;
}
if ( IsRich() )
{
// change the colour of everything
CHARFORMAT cf;
wxZeroMemory(cf);
cf.cbSize = sizeof(cf);
cf.dwMask = CFM_COLOR;
cf.crTextColor = wxColourToRGB(colour);
::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
}
return TRUE;
}
// ----------------------------------------------------------------------------
// styling support for rich edit controls
// ----------------------------------------------------------------------------
bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
{
if ( !IsRich() )
{
// can't do it with normal text control
return FALSE;
}
// the rich text control doesn't handle setting background colour, so don't
// even try if it's the only thing we want to change
if ( wxRichEditModule::GetLoadedVersion() < 2 &&
!style.HasFont() && !style.HasTextColour() )
{
// nothing to do: return TRUE if there was really nothing to do and
// FALSE if we failed to set bg colour
return !style.HasBackgroundColour();
}
// order the range if needed
if ( start > end )
{
long tmp = start;
start = end;
end = tmp;
}
// we can only change the format of the selection, so select the range we
// want and restore the old selection later
long startOld, endOld;
GetSelection(&startOld, &endOld);
// but do we really have to change the selection?
bool changeSel = start != startOld || end != endOld;
if ( changeSel )
SendMessage(GetHwnd(), EM_SETSEL, (WPARAM) start, (LPARAM) end);
// initialize CHARFORMAT struct
#if wxUSE_RICHEDIT2
CHARFORMAT2 cf;
#else
CHARFORMAT cf;
#endif
wxZeroMemory(cf);
cf.cbSize = sizeof(cf);
if ( style.HasFont() )
{
cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
// fill in data from LOGFONT but recalculate lfHeight because we need
// the real height in twips and not the negative number which
// wxFillLogFont() returns (this is correct in general and works with
// the Windows font mapper, but not here)
LOGFONT lf;
wxFillLogFont(&lf, &style.GetFont());
cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
cf.bCharSet = lf.lfCharSet;
cf.bPitchAndFamily = lf.lfPitchAndFamily;
wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
// also deal with underline/italic/bold attributes: note that we must
// always set CFM_ITALIC &c bits in dwMask, even if we don't set the
// style to allow clearing it
if ( lf.lfItalic )
{
cf.dwEffects |= CFE_ITALIC;
}
if ( lf.lfWeight == FW_BOLD )
{
cf.dwEffects |= CFE_BOLD;
}
if ( lf.lfUnderline )
{
cf.dwEffects |= CFE_UNDERLINE;
}
// strikeout fonts are not supported by wxWindows
}
if ( style.HasTextColour() )
{
cf.dwMask |= CFM_COLOR;
cf.crTextColor = wxColourToRGB(style.GetTextColour());
}
#if wxUSE_RICHEDIT2
if ( wxRichEditModule::GetLoadedVersion() > 1 && style.HasBackgroundColour() )
{
cf.dwMask |= CFM_BACKCOLOR;
cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
}
#endif // wxUSE_RICHEDIT2
// do format the selection
bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
SCF_SELECTION, (LPARAM)&cf) != 0;
if ( !ok )
{
wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
}
if ( changeSel )
{
// restore the original selection
SendMessage(GetHwnd(), EM_SETSEL, (WPARAM)startOld, (LPARAM)endOld);
}
return ok;
}
// ----------------------------------------------------------------------------
// wxRichEditModule
// ----------------------------------------------------------------------------
bool wxRichEditModule::OnInit()
{
// don't do anything - we will load it when needed
return TRUE;
}
void wxRichEditModule::OnExit()
{
if ( ms_hRichEdit )
{
FreeLibrary(ms_hRichEdit);
}
}
/* static */
bool wxRichEditModule::Load(int version)
{
wxCHECK_MSG( version >= 1 && version <= 3, FALSE,
_T("incorrect richedit control version requested") );
if ( version <= ms_verRichEdit )
{
// we've already got this or better
return TRUE;
}
if ( ms_hRichEdit )
{
::FreeLibrary(ms_hRichEdit);
}
// always try load riched20.dll first - like this we won't have to reload
// it later if we're first asked for RE 1 and then for RE 2 or 3
wxString dllname = _T("riched20.dll");
ms_hRichEdit = ::LoadLibrary(dllname);
ms_verRichEdit = 2; // no way to tell if it's 2 or 3, assume 2
if ( !ms_hRichEdit && (version == 1) )
{
// fall back to RE 1
dllname = _T("riched32.dll");
ms_hRichEdit = ::LoadLibrary(dllname);
ms_verRichEdit = 1;
}
if ( !ms_hRichEdit )
{
wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
ms_verRichEdit = -1;
return FALSE;
}
return TRUE;
}
#endif // wxUSE_RICHEDIT
#endif // wxUSE_TEXTCTRL
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