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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Internationalization</h1>
<p>
This example shows how to internationalize applications. Start it with
<pre># i18n de</pre><p> to get a german version and with
<pre># i18n en</pre><p> to get the english version.
<p> Refer also to <a href="i18n.html">the internationalization documentation</a>.
<p> <hr>
<p> Header file:
<p> <pre>/****************************************************************************
** $Id: qt/mywidget.h 3.0.2 edited Oct 12 12:18 $
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#ifndef MYWIDGET_H
#define MYWIDGET_H
#include <<a href="qmainwindow-h.html">qmainwindow.h</a>>
#include <<a href="qstring-h.html">qstring.h</a>>
class MyWidget : public <a href="qmainwindow.html">QMainWindow</a>
{
<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
public:
MyWidget( <a href="qwidget.html">QWidget</a>* parent=0, const char* name = 0 );
signals:
void closed();
protected:
void closeEvent(QCloseEvent*);
private:
static void initChoices(QWidget* parent);
};
#endif
</pre>
<p> <hr>
<p> Implementation:
<p> <pre>/****************************************************************************
** $Id: qt/mywidget.cpp 3.0.2 edited Oct 12 12:18 $
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include <<a href="qbuttongroup-h.html">qbuttongroup.h</a>>
#include <<a href="qradiobutton-h.html">qradiobutton.h</a>>
#include <<a href="qlabel-h.html">qlabel.h</a>>
#include <<a href="qlistbox-h.html">qlistbox.h</a>>
#include <<a href="qcombobox-h.html">qcombobox.h</a>>
#include <<a href="qlabel-h.html">qlabel.h</a>>
#include <<a href="qhbox-h.html">qhbox.h</a>>
#include <<a href="qvbox-h.html">qvbox.h</a>>
#include <<a href="qaccel-h.html">qaccel.h</a>>
#include <<a href="qpopupmenu-h.html">qpopupmenu.h</a>>
#include <<a href="qmenubar-h.html">qmenubar.h</a>>
#include <<a href="qstatusbar-h.html">qstatusbar.h</a>>
#include <<a href="qapplication-h.html">qapplication.h</a>>
#include "mywidget.h"
<a name="f406"></a>MyWidget::MyWidget( <a href="qwidget.html">QWidget</a>* parent, const char* name )
: <a href="qmainwindow.html">QMainWindow</a>( parent, name )
{
<a href="qvbox.html">QVBox</a>* central = new <a href="qvbox.html">QVBox</a>(this);
<a name="x1358"></a> central-><a href="qframe.html#setMargin">setMargin</a>( 5 );
<a name="x1359"></a> central-><a href="qhbox.html#setSpacing">setSpacing</a>( 5 );
<a href="qmainwindow.html#setCentralWidget">setCentralWidget</a>(central);
<a href="qpopupmenu.html">QPopupMenu</a>* file = new <a href="qpopupmenu.html">QPopupMenu</a>(this);
file-><a href="qmenudata.html#insertItem">insertItem</a>( <a href="qobject.html#tr">tr</a>("E&xit"), qApp, SLOT(<a href="qapplication.html#quit">quit</a>()),
<a name="x1356"></a> QAccel::<a href="qaccel.html#stringToKey">stringToKey</a>(<a href="qobject.html#tr">tr</a>("Ctrl+Q")) );
<a href="qmainwindow.html#menuBar">menuBar</a>()->insertItem( <a href="qobject.html#tr">tr</a>("&File"), file );
<a href="qwidget.html#setCaption">setCaption</a>( <a href="qobject.html#tr">tr</a>( "Internationalization Example" ) );
<a href="qstring.html">QString</a> l;
<a href="qmainwindow.html#statusBar">statusBar</a>()->message( <a href="qobject.html#tr">tr</a>("Language: English") );
( void )new <a href="qlabel.html">QLabel</a>( <a href="qobject.html#tr">tr</a>( "The Main Window" ), central );
<a href="qbuttongroup.html">QButtonGroup</a>* gbox = new <a href="qbuttongroup.html">QButtonGroup</a>( 1, QGroupBox::Horizontal,
<a href="qobject.html#tr">tr</a>( "View" ), central );
(void)new <a href="qradiobutton.html">QRadioButton</a>( <a href="qobject.html#tr">tr</a>( "Perspective" ), gbox );
(void)new <a href="qradiobutton.html">QRadioButton</a>( <a href="qobject.html#tr">tr</a>( "Isometric" ), gbox );
(void)new <a href="qradiobutton.html">QRadioButton</a>( <a href="qobject.html#tr">tr</a>( "Oblique" ), gbox );
initChoices(central);
}
static const char* choices[] = {
QT_TRANSLATE_NOOP( "MyWidget", "First" ),
QT_TRANSLATE_NOOP( "MyWidget", "Second" ),
QT_TRANSLATE_NOOP( "MyWidget", "Third" ),
0
};
void <a name="f407"></a>MyWidget::initChoices(QWidget* parent)
{
<a href="qlistbox.html">QListBox</a>* lb = new <a href="qlistbox.html">QListBox</a>( parent );
for ( int i = 0; choices[i]; i++ )
<a name="x1360"></a> lb-><a href="qlistbox.html#insertItem">insertItem</a>( <a href="qobject.html#tr">tr</a>( choices[i] ) );
}
<a name="x1362"></a>void MyWidget::<a href="qwidget.html#closeEvent">closeEvent</a>(QCloseEvent* e)
{
QWidget::<a href="qwidget.html#closeEvent">closeEvent</a>(e);
emit closed();
}
</pre>
<p> <hr>
<p> Main:
<p> <pre>/****************************************************************************
** $Id: qt/main.cpp 3.0.2 edited Dec 6 13:41 $
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include <<a href="qapplication-h.html">qapplication.h</a>>
#include <<a href="qtranslator-h.html">qtranslator.h</a>>
#include <<a href="qfileinfo-h.html">qfileinfo.h</a>>
#include <<a href="qmessagebox-h.html">qmessagebox.h</a>>
#include <<a href="qcheckbox-h.html">qcheckbox.h</a>>
#include <<a href="qvbox-h.html">qvbox.h</a>>
#include <<a href="qlayout-h.html">qlayout.h</a>>
#include <<a href="qbuttongroup-h.html">qbuttongroup.h</a>>
#include <<a href="qpushbutton-h.html">qpushbutton.h</a>>
#include <<a href="qsignalmapper-h.html">qsignalmapper.h</a>>
#include <<a href="qtextcodec-h.html">qtextcodec.h</a>>
#include <stdlib.h>
#if defined(Q_OS_UNIX)
#include <unistd.h>
#endif
#include "mywidget.h"
//#define USE_I18N_FONT
class QVDialog : public <a href="qdialog.html">QDialog</a> {
public:
QVDialog(QWidget *parent=0, const char *name=0, bool modal=FALSE,
WFlags f=0) : <a href="qdialog.html">QDialog</a>(parent,name,modal,f)
{
<a href="qvboxlayout.html">QVBoxLayout</a>* vb = new <a href="qvboxlayout.html">QVBoxLayout</a>(this,8);
<a name="x1373"></a> vb-><a href="qlayout.html#setAutoAdd">setAutoAdd</a>(TRUE);
hb = 0;
sm = new <a href="qsignalmapper.html">QSignalMapper</a>(this);
<a name="x1377"></a> connect(sm,SIGNAL(<a href="qsignalmapper.html#mapped">mapped</a>(int)),this,SLOT(done(int)));
}
void addButtons( const <a href="qstring.html">QString</a>& cancel=QString::null,
const <a href="qstring.html">QString</a>& ok=QString::null,
const <a href="qstring.html">QString</a>& mid1=QString::null,
const <a href="qstring.html">QString</a>& mid2=QString::null,
const <a href="qstring.html">QString</a>& mid3=QString::null)
{
<a name="x1379"></a> addButton(ok.<a href="qstring.html#isNull">isNull</a>() ? tr("OK") : ok, 1);
if ( !mid1.<a href="qstring.html#isNull">isNull</a>() ) addButton(mid1,2);
if ( !mid2.<a href="qstring.html#isNull">isNull</a>() ) addButton(mid2,3);
if ( !mid3.<a href="qstring.html#isNull">isNull</a>() ) addButton(mid3,4);
addButton(cancel.<a href="qstring.html#isNull">isNull</a>() ? tr("Cancel") : cancel, 0);
}
void addButton( const <a href="qstring.html">QString</a>& text, int result )
{
if ( !hb )
hb = new <a href="qhbox.html">QHBox</a>(this);
<a href="qpushbutton.html">QPushButton</a> *c = new <a href="qpushbutton.html">QPushButton</a>(text, hb);
<a name="x1378"></a> sm-><a href="qsignalmapper.html#setMapping">setMapping</a>(c,result);
<a name="x1376"></a> connect(c,SIGNAL(<a href="qbutton.html#clicked">clicked</a>()),sm,SLOT(<a href="qsignalmapper.html#map">map</a>()));
}
private:
<a href="qsignalmapper.html">QSignalMapper</a> *sm;
<a href="qhbox.html">QHBox</a> *hb;
};
MyWidget* showLang(QString lang)
{
static QTranslator *translator = 0;
<a name="x1369"></a> qApp-><a href="qapplication.html#setPalette">setPalette</a>(QPalette(QColor(220-rand()%64,220-rand()%64,220-rand()%64)));
lang = "mywidget_" + lang + ".qm";
<a href="qfileinfo.html">QFileInfo</a> fi( lang );
<a name="x1372"></a> if ( !fi.<a href="qfileinfo.html#exists">exists</a>() ) {
<a name="x1374"></a> QMessageBox::<a href="qmessagebox.html#warning">warning</a>( 0, "File error",
QString("Cannot find translation for language: "+lang+
"\n(try eg. 'de', 'ko' or 'no')") );
return 0;
}
if ( translator ) {
<a name="x1367"></a> qApp-><a href="qapplication.html#removeTranslator">removeTranslator</a>( translator );
delete translator;
}
translator = new <a href="qtranslator.html">QTranslator</a>( 0 );
<a name="x1381"></a> translator-><a href="qtranslator.html#load">load</a>( lang, "." );
<a name="x1365"></a> qApp-><a href="qapplication.html#installTranslator">installTranslator</a>( translator );
MyWidget *m = new MyWidget;
<a name="x1382"></a> m-><a href="qwidget.html#setCaption">setCaption</a>("Qt Example - i18n - " + m-><a href="qwidget.html#caption">caption</a>() );
return m;
}
int main( int argc, char** argv )
{
<a href="qapplication.html">QApplication</a> app( argc, argv );
const char* qm[]=
{ "cs", "de", "el", "en", "eo", "fr", "it", "jp", "ko", "no", "ru", "zh", 0 };
#if defined(Q_OS_UNIX)
srand( getpid() << 2 );
#endif
<a href="qstring.html">QString</a> lang;
if ( argc == 2 )
lang = argv[1];
if ( argc != 2 || lang == "all" ) {
QVDialog dlg(0,0,TRUE);
QCheckBox* qmb[sizeof(qm)/sizeof(qm[0])];
int r;
if ( lang == "all" ) {
r = 2;
} else {
<a href="qbuttongroup.html">QButtonGroup</a> *bg = new <a href="qbuttongroup.html">QButtonGroup</a>(4,Qt::Vertical,"Choose Locales",&dlg);
<a name="x1380"></a> <a href="qstring.html">QString</a> loc = QTextCodec::<a href="qtextcodec.html#locale">locale</a>();
for ( int i=0; qm[i]; i++ ) {
qmb[i] = new <a href="qcheckbox.html">QCheckBox</a>((const char*)qm[i],bg);
qmb[i]->setChecked( loc == qm[i] );
}
dlg.addButtons("Cancel","OK","All");
<a name="x1371"></a> r = dlg.<a href="qdialog.html#exec">exec</a>();
}
if ( r ) {
<a name="x1363"></a> bool tight = qApp-><a href="qapplication.html#desktop">desktop</a>()->screen()->width() < 1024;
int x=5;
int y=25;
for ( int i=0; qm[i]; i++ ) {
if ( r == 2 || qmb[i]->isChecked() ) {
MyWidget* w = showLang((const char*)qm[i]);
if( w == 0 ) exit( 0 );
QObject::<a href="qobject.html#connect">connect</a>(w, SIGNAL(closed()), qApp, SLOT(<a href="qapplication.html#quit">quit</a>()));
<a name="x1384"></a> w-><a href="qwidget.html#setGeometry">setGeometry</a>(x,y,197,356);
w-><a href="qwidget.html#show">show</a>();
if ( tight ) {
x += 8;
y += 8;
} else {
x += 205;
if ( x > 1000 ) {
x = 5;
y += 384;
}
}
}
}
} else {
exit( 0 );
}
} else {
<a href="qstring.html">QString</a> lang = argv[1];
<a href="qwidget.html">QWidget</a>* m = showLang(lang);
app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( m );
m-><a href="qwidget.html#setCaption">setCaption</a>("Qt Example - i18n");
m-><a href="qwidget.html#show">show</a>();
}
#ifdef USE_I18N_FONT
memorymanager->savePrerenderedFont(font.handle(),FALSE);
#endif
// While we run "all", kill them all
return app.<a href="qapplication.html#exec">exec</a>();
}
</pre>
<p>See also <a href="examples.html">Examples</a>.
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