/****************************************************************************
** $Id: qwerty.h,v 1.3 1999/06/17 18:27:35 ettrich Exp $
**
** Copyright (C) 1992-1999 Troll Tech 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 QWERTY_H
#define QWERTY_H
#include <qwidget.h>
#include <qmenubar.h>
#include <qmultilineedit.h>
#include <qprinter.h>
class Editor : public QWidget
{
Q_OBJECT
public:
Editor( QWidget *parent=0, const char *name="qwerty" );
~Editor();
public slots:
void newDoc();
void load();
void load( const QString& fileName );
bool save();
void print();
void addEncoding();
protected:
void resizeEvent( QResizeEvent * );
void closeEvent( QCloseEvent * );
private slots:
void saveAsEncoding( int );
void textChanged();
private:
bool saveAs( const QString& fileName, int code=-1 );
void rebuildCodecList();
QMenuBar *m;
QMultiLineEdit *e;
QPrinter printer;
QPopupMenu *save_as;
bool changed;
};
#endif // QWERTY_H
/****************************************************************************
** $Id: qwerty.cpp,v 1.4.2.1 1999/07/14 19:50:34 aavit Exp $
**
** Copyright (C) 1992-1999 Troll Tech 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 "qwerty.h"
#include <qapplication.h>
#include <qfile.h>
#include <qfiledialog.h>
#include <qkeycode.h>
#include <qpopupmenu.h>
#include <qtextstream.h>
#include <qpainter.h>
#include <qmessagebox.h>
#include <qpaintdevicemetrics.h>
#include <qlist.h>
#include <qtextcodec.h>
static QList<QTextCodec> *codecList = 0;
enum { Uni = 0, MBug = 1, Lat1 = 2, Codec = 5 };
Editor::Editor( QWidget * parent , const char * name )
: QWidget( parent, name, WDestructiveClose )
{
m = new QMenuBar( this, "menu" );
QPopupMenu * file = new QPopupMenu();
CHECK_PTR( file );
m->insertItem( "&File", file );
file->insertItem( "&New", this, SLOT(newDoc()), ALT+Key_N );
file->insertItem( "&Open", this, SLOT(load()), ALT+Key_O );
file->insertItem( "&Save", this, SLOT(save()), ALT+Key_S );
save_as = new QPopupMenu();
file->insertItem( "Save &as", save_as );
file->insertItem( "Add &encoding", this, SLOT(addEncoding()) );
file->insertSeparator();
file->insertItem( "&Print", this, SLOT(print()), ALT+Key_P );
file->insertSeparator();
file->insertItem( "&Close", this, SLOT(close()),ALT+Key_W );
file->insertItem( "&Quit", qApp, SLOT(closeAllWindows()), ALT+Key_Q );
connect( save_as, SIGNAL(activated(int)), this, SLOT(saveAsEncoding(int)) );
rebuildCodecList();
changed = FALSE;
e = new QMultiLineEdit( this, "editor" );
connect( e, SIGNAL( textChanged() ), this, SLOT( textChanged() ) );
e->setFont( QFont("Helvetica", 24) );
e->setFocus();
}
Editor::~Editor()
{
}
void Editor::rebuildCodecList()
{
delete codecList;
codecList = new QList<QTextCodec>;
QTextCodec *codec;
int i;
for (i = 0; (codec = QTextCodec::codecForIndex(i)); i++)
codecList->append( codec );
int n = codecList->count();
save_as->clear();
save_as->insertItem("Unicode", Uni );
save_as->insertItem("Latin1", Lat1 );
save_as->insertItem("Microsoft Unicode", MBug );
for ( i = 0; i < n; i++ )
save_as->insertItem( codecList->at(i)->name(), Codec + i );
}
void Editor::newDoc()
{
Editor *ed = new Editor;
ed->resize( 400, 400 );
ed->show();
}
void Editor::load()
{
QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
if ( !fn.isEmpty() )
load( fn );
}
void Editor::load( const QString& fileName )
{
QFile f( fileName );
if ( !f.open( IO_ReadOnly ) )
return;
e->setAutoUpdate( FALSE );
QTextStream t(&f);
e->setText( t.read() );
f.close();
e->setAutoUpdate( TRUE );
e->repaint();
setCaption( fileName );
changed = FALSE;
}
bool Editor::save()
{
//storing filename (proper save) is left as an exercise...
QString fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
if ( !fn.isEmpty() )
return saveAs( fn );
return FALSE;
}
void Editor::saveAsEncoding( int code )
{
//storing filename (proper save) is left as an exercise...
QString fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
if ( !fn.isEmpty() )
(void) saveAs( fn, code );
}
void Editor::addEncoding()
{
QString fn = QFileDialog::getOpenFileName( QString::null, "*.map", this );
if ( !fn.isEmpty() ) {
QFile f(fn);
if (f.open(IO_ReadOnly)) {
if (QTextCodec::loadCharmap(&f)) {
rebuildCodecList();
} else {
QMessageBox::warning(0,"Charmap error",
"The file did not contain a valid charmap.\n\n"
"A charmap file should look like this:\n"
" <code_set_name> thename\n"
" <escape_char> /\n"
" % alias thealias\n"
" CHARMAP\n"
" <tokenname> /x12 <U3456>\n"
" <tokenname> /xAB/x12 <U0023>\n"
" ...\n"
" END CHARMAP\n"
);
}
}
}
}
bool Editor::saveAs( const QString& fileName, int code )
{
QFile f( fileName );
if ( !f.open( IO_WriteOnly ) ) {
QMessageBox::warning(this,"I/O Error",
QString("The file could not be opened.\n\n")
+fileName);
return FALSE;
}
QTextStream t(&f);
if ( code >= Codec )
t.setCodec( codecList->at(code-Codec) );
else if ( code == Uni )
t.setEncoding( QTextStream::Unicode );
else if ( code == MBug )
t.setEncoding( QTextStream::UnicodeReverse );
else if ( code == Lat1 )
t.setEncoding( QTextStream::Latin1 );
t << e->text();
f.close();
setCaption( fileName );
changed = FALSE;
return TRUE;
}
void Editor::print()
{
if ( printer.setup(this) ) { // opens printer dialog
printer.setFullPage(TRUE); // we'll set our own margins
QPainter p;
p.begin( &printer ); // paint on printer
p.setFont( e->font() );
QFontMetrics fm = p.fontMetrics();
QPaintDeviceMetrics metrics( &printer ); // need width/height
// of printer surface
const int MARGIN = metrics.logicalDpiX() / 2; // half-inch margin
int yPos = MARGIN; // y position for each line
for( int i = 0 ; i < e->numLines() ; i++ ) {
if ( printer.aborted() )
break;
if ( yPos + fm.lineSpacing() > metrics.height() - MARGIN ) {
// no more room on this page
if ( !printer.newPage() ) // start new page
break; // some error
yPos = MARGIN; // back to top of page
}
p.drawText( MARGIN, yPos, metrics.width() - 2*MARGIN,
fm.lineSpacing(), ExpandTabs, e->textLine( i ) );
yPos += fm.lineSpacing();
}
p.end(); // send job to printer
}
}
void Editor::resizeEvent( QResizeEvent * )
{
if ( e && m )
e->setGeometry( 0, m->height(), width(), height() - m->height() );
}
void Editor::closeEvent( QCloseEvent *e )
{
e->accept();
if ( changed ) { // the text has been changed
switch ( QMessageBox::warning( this, "Qwerty",
"Save changes to Document?",
tr("&Yes"),
tr("&No"),
tr("Cancel"),
0, 2) ) {
case 0: // yes
if ( save() )
e->accept();
else
e->ignore();
break;
case 1: // no
e->accept();
break;
default: // cancel
e->ignore();
break;
}
}
}
void Editor::textChanged()
{
changed = TRUE;
}
/****************************************************************************
** $Id: main.cpp,v 1.3 1999/06/23 19:09:49 ettrich Exp $
**
** Copyright (C) 1992-1999 Troll Tech 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 <qapplication.h>
#include "qwerty.h"
int main( int argc, char **argv )
{
QApplication a( argc, argv );
int i;
for ( i= argc <= 1 ? 0 : 1; i<argc; i++ ) {
Editor *e = new Editor;
e->resize( 400, 400 );
if ( i > 0 )
e->load( argv[i] );
e->show();
}
a.connect( &a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()) );
return a.exec();
}
| Copyright © 1999 Troll Tech | Trademarks | Qt version 2.0.2
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