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common
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textcmn.cpp
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C/C++ Source or Header
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2002-08-08
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396 lines
///////////////////////////////////////////////////////////////////////////////
// Name: common/textcmn.cpp
// Purpose: implementation of platform-independent functions of wxTextCtrl
// Author: Julian Smart
// Modified by:
// Created: 13.07.99
// RCS-ID: $Id: textcmn.cpp,v 1.22 2002/08/05 18:04:07 RR Exp $
// Copyright: (c) wxWindows team
// Licence: wxWindows license
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
#ifdef __GNUG__
#pragma implementation "textctrlbase.h"
#endif
// 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/intl.h"
#include "wx/log.h"
#include "wx/textctrl.h"
#endif // WX_PRECOMP
#include "wx/ffile.h"
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
// we don't have any objects of type wxTextCtrlBase in the program, only
// wxTextCtrl, so this cast is safe
#define TEXTCTRL(ptr) ((wxTextCtrl *)(ptr))
// ============================================================================
// implementation
// ============================================================================
IMPLEMENT_DYNAMIC_CLASS(wxTextUrlEvent, wxCommandEvent)
DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_UPDATED)
DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_ENTER)
DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_URL)
DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_MAXLEN)
// ----------------------------------------------------------------------------
// ctor
// ----------------------------------------------------------------------------
wxTextCtrlBase::wxTextCtrlBase()
{
}
wxTextCtrlBase::~wxTextCtrlBase()
{
}
// ----------------------------------------------------------------------------
// style functions - not implemented here
// ----------------------------------------------------------------------------
/* static */
wxTextAttr wxTextAttr::Combine(const wxTextAttr& attr,
const wxTextAttr& attrDef,
const wxTextCtrlBase *text)
{
wxFont font = attr.GetFont();
if ( !font.Ok() )
{
font = attrDef.GetFont();
if ( text && !font.Ok() )
font = text->GetFont();
}
wxColour colFg = attr.GetTextColour();
if ( !colFg.Ok() )
{
colFg = attrDef.GetTextColour();
if ( text && !colFg.Ok() )
colFg = text->GetForegroundColour();
}
wxColour colBg = attr.GetBackgroundColour();
if ( !colBg.Ok() )
{
colBg = attrDef.GetBackgroundColour();
if ( text && !colBg.Ok() )
colBg = text->GetBackgroundColour();
}
return wxTextAttr(colFg, colBg, font);
}
// apply styling to text range
bool wxTextCtrlBase::SetStyle(long WXUNUSED(start), long WXUNUSED(end),
const wxTextAttr& WXUNUSED(style))
{
// to be implemented in derived TextCtrl classes
return FALSE;
}
// change default text attributes
bool wxTextCtrlBase::SetDefaultStyle(const wxTextAttr& style)
{
// keep the old attributes if the new style doesn't specify them unless the
// new style is empty - then reset m_defaultStyle (as there is no other way
// to do it)
if ( style.IsDefault() )
m_defaultStyle = style;
else
m_defaultStyle = wxTextAttr::Combine(style, m_defaultStyle, this);
return TRUE;
}
// get default text attributes
const wxTextAttr& wxTextCtrlBase::GetDefaultStyle() const
{
return m_defaultStyle;
}
// ----------------------------------------------------------------------------
// file IO functions
// ----------------------------------------------------------------------------
bool wxTextCtrlBase::LoadFile(const wxString& filename)
{
#if wxUSE_FFILE
wxFFile file(filename);
if ( file.IsOpened() )
{
wxString text;
if ( file.ReadAll(&text) )
{
SetValue(text);
DiscardEdits();
m_filename = filename;
return TRUE;
}
}
wxLogError(_("File couldn't be loaded."));
#endif // wxUSE_FFILE
return FALSE;
}
bool wxTextCtrlBase::SaveFile(const wxString& filename)
{
wxString filenameToUse = filename.IsEmpty() ? m_filename : filename;
if ( !filenameToUse )
{
// what kind of message to give? is it an error or a program bug?
wxLogDebug(wxT("Can't save textctrl to file without filename."));
return FALSE;
}
#if wxUSE_FFILE
wxFFile file(filename, "w");
if ( file.IsOpened() && file.Write(GetValue()) )
{
// it's not modified any longer
DiscardEdits();
m_filename = filename;
return TRUE;
}
wxLogError(_("The text couldn't be saved."));
#endif // wxUSE_FFILE
return FALSE;
}
// ----------------------------------------------------------------------------
// stream-like insertion operator
// ----------------------------------------------------------------------------
wxTextCtrl& wxTextCtrlBase::operator<<(const wxString& s)
{
AppendText(s);
return *TEXTCTRL(this);
}
wxTextCtrl& wxTextCtrlBase::operator<<(float f)
{
wxString str;
str.Printf(wxT("%.2f"), f);
AppendText(str);
return *TEXTCTRL(this);
}
wxTextCtrl& wxTextCtrlBase::operator<<(double d)
{
wxString str;
str.Printf(wxT("%.2f"), d);
AppendText(str);
return *TEXTCTRL(this);
}
wxTextCtrl& wxTextCtrlBase::operator<<(int i)
{
wxString str;
str.Printf(wxT("%d"), i);
AppendText(str);
return *TEXTCTRL(this);
}
wxTextCtrl& wxTextCtrlBase::operator<<(long i)
{
wxString str;
str.Printf(wxT("%ld"), i);
AppendText(str);
return *TEXTCTRL(this);
}
wxTextCtrl& wxTextCtrlBase::operator<<(const wxChar c)
{
return operator<<(wxString(c));
}
// ----------------------------------------------------------------------------
// streambuf methods implementation
// ----------------------------------------------------------------------------
#ifndef NO_TEXT_WINDOW_STREAM
int wxTextCtrlBase::overflow(int c)
{
AppendText((wxChar)c);
// return something different from EOF
return 0;
}
#endif // NO_TEXT_WINDOW_STREAM
// ----------------------------------------------------------------------------
// clipboard stuff
// ----------------------------------------------------------------------------
bool wxTextCtrlBase::CanCopy() const
{
// can copy if there's a selection
long from, to;
GetSelection(&from, &to);
return from != to;
}
bool wxTextCtrlBase::CanCut() const
{
// can cut if there's a selection and if we're not read only
return CanCopy() && IsEditable();
}
bool wxTextCtrlBase::CanPaste() const
{
// can paste if we are not read only
return IsEditable();
}
// ----------------------------------------------------------------------------
// emulating key presses
// ----------------------------------------------------------------------------
bool wxTextCtrlBase::EmulateKeyPress(const wxKeyEvent& event)
{
// the generic version is unused in wxMSW
#ifndef __WIN32__
wxChar ch;
int keycode = event.GetKeyCode();
switch ( keycode )
{
case WXK_NUMPAD0:
case WXK_NUMPAD1:
case WXK_NUMPAD2:
case WXK_NUMPAD3:
case WXK_NUMPAD4:
case WXK_NUMPAD5:
case WXK_NUMPAD6:
case WXK_NUMPAD7:
case WXK_NUMPAD8:
case WXK_NUMPAD9:
ch = _T('0') + keycode - WXK_NUMPAD0;
break;
case WXK_MULTIPLY:
case WXK_NUMPAD_MULTIPLY:
ch = _T('*');
break;
case WXK_ADD:
case WXK_NUMPAD_ADD:
ch = _T('+');
break;
case WXK_SUBTRACT:
case WXK_NUMPAD_SUBTRACT:
ch = _T('-');
break;
case WXK_DECIMAL:
case WXK_NUMPAD_DECIMAL:
ch = _T('.');
break;
case WXK_DIVIDE:
case WXK_NUMPAD_DIVIDE:
ch = _T('/');
break;
default:
if ( keycode < 256 && keycode >= 0 && wxIsprint(keycode) )
{
// FIXME this is not going to work for non letters...
if ( !event.ShiftDown() )
{
keycode = wxTolower(keycode);
}
ch = (wxChar)keycode;
}
else
{
ch = _T('\0');
}
}
if ( ch )
{
WriteText(ch);
return TRUE;
}
#endif // !__WIN32__
return FALSE;
}
// ----------------------------------------------------------------------------
// selection and ranges
// ----------------------------------------------------------------------------
void wxTextCtrlBase::SelectAll()
{
SetSelection(0, GetLastPosition());
}
wxString wxTextCtrlBase::GetStringSelection() const
{
long from, to;
GetSelection(&from, &to);
return GetRange(from, to);
}
wxString wxTextCtrlBase::GetRange(long from, long to) const
{
wxString sel;
if ( from < to )
{
sel = GetValue().Mid(from, to - from);
}
return sel;
}
#else // !wxUSE_TEXTCTRL
// define this one even if !wxUSE_TEXTCTRL because it is also used by other
// controls (wxComboBox and wxSpinCtrl)
#include "wx/event.h"
DEFINE_EVENT_TYPE(wxEVT_COMMAND_TEXT_UPDATED)
#endif // wxUSE_TEXTCTRL/!wxUSE_TEXTCTRL