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352 lines
9.1 KiB
352 lines
9.1 KiB
15 years ago
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/***************************************************************************
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* $Id$
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**
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* Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
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**
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* This file is part of an example program for Qt. This example
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* program may be used, distributed and modified without limitation.
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**
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****************************************************************************/
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import org.kde.qt.*;
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import java.util.ArrayList;
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class Editor extends QWidget
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{
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private QMenuBar m;
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private QMultiLineEdit e;
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private QPrinter printer = new QPrinter();
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private QPopupMenu save_as;
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private QPopupMenu open_as;
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private boolean changed;
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private boolean no_writing = false;
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static ArrayList codecList = null;
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static final int Uni = 0;
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static final int MBug = 1;
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static final int Lat1 = 2;
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static final int Local = 3;
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static final int Guess = 4;
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static final int Codec = 5;
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Editor( )
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{
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this(null, null);
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}
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Editor( QWidget parent , String name )
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{
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super( parent, name, WDestructiveClose );
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m = new QMenuBar( this, "menu" );
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QPopupMenu file = new QPopupMenu(this);
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m.insertItem( "&File", file );
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file.insertItem( "&New", this, SLOT("newDoc()"), new QKeySequence(ALT+Key_N) );
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file.insertItem( "&Open...", this, SLOT("load()"), new QKeySequence(ALT+Key_O) );
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file.insertItem( "&Save...", this, SLOT("save()"), new QKeySequence(ALT+Key_S) );
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file.insertSeparator();
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open_as = new QPopupMenu(file);
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file.insertItem( "Open &As", open_as );
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save_as = new QPopupMenu(file);
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file.insertItem( "Sa&ve As", save_as );
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file.insertItem( "Add &Encoding", this, SLOT("addEncoding()") );
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file.insertSeparator();
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file.insertItem( "&Print...", this, SLOT("print()"), new QKeySequence(ALT+Key_P) );
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file.insertSeparator();
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file.insertItem( "&Close", this, SLOT("close()"),new QKeySequence(ALT+Key_W) );
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file.insertItem( "&Quit", qApp(), SLOT("closeAllWindows()"), new QKeySequence(ALT+Key_Q) );
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connect( save_as, SIGNAL("activated(int)"), this, SLOT("saveAsEncoding(int)") );
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connect( open_as, SIGNAL("activated(int)"), this, SLOT("openAsEncoding(int)") );
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rebuildCodecList();
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QPopupMenu edit = new QPopupMenu(m);
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m.insertItem( "&Edit", edit );
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edit.insertItem( "To &Uppercase", this, SLOT("toUpper()"), new QKeySequence(ALT+Key_U) );
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edit.insertItem( "To &Lowercase", this, SLOT("toLower()"), new QKeySequence(ALT+Key_L) );
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edit.insertSeparator();
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edit.insertItem( "&Select Font" , this, SLOT("getFont()"), new QKeySequence(ALT+Key_F) );
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changed = false;
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e = new QMultiLineEdit( this, "editor" );
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connect( e, SIGNAL(" textChanged()"), this, SLOT(" textChanged()") );
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// We use Unifont - if you have it installed you'll see all
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// Unicode character glyphs.
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//
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// Unifont only comes in one pixel size, so we cannot let
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// it change pixel size as the display DPI changes.
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//
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QFont unifont = new QFont("unifont",16,50); unifont.setPixelSize(16);
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e.setFont( unifont );
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e.setFocus();
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}
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public void getFont()
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{
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boolean[] ok = { true };
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QFont f = QFontDialog.getFont( ok, e.font() );
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if ( ok[0] ) {
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e.setFont( f );
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}
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}
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void rebuildCodecList()
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{
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codecList = new ArrayList();
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QTextCodec codec = null;
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int i;
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for (i = 0; (codec = QTextCodec.codecForIndex(i)) != null; i++)
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codecList.add( codec );
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int n = codecList.size();
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for (int pm=0; pm<2; pm++) {
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QPopupMenu menu = pm != 0 ? open_as : save_as;
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menu.clear();
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String local = "Local (";
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local += QTextCodec.codecForLocale().name();
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local += ")";
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menu.insertItem( local, Local );
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menu.insertItem( "Unicode", Uni );
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menu.insertItem( "Latin1", Lat1 );
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menu.insertItem( "Microsoft Unicode", MBug );
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if ( pm != 0 )
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menu.insertItem( "[guess]", Guess );
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for ( i = 0; i < n; i++ )
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menu.insertItem( ((QTextCodec) codecList.get(i)).name(), Codec + i );
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}
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}
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void newDoc()
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{
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Editor ed = new Editor();
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if ( qApp().desktop().size().width() < 450
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|| qApp().desktop().size().height() < 450 ) {
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ed.showMaximized();
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} else {
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ed.resize( 400, 400 );
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ed.show();
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}
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}
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void load()
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{
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String fn = QFileDialog.getOpenFileName( "", "", this );
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if ( fn != null )
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load( fn, -1 );
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}
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void load( String fileName )
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{
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load(fileName, -1);
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}
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void load( String fileName, int code )
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{
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QFile f = new QFile( fileName );
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if ( !f.open( QIODevice.IO_ReadOnly ) )
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return;
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e.setAutoUpdate( false );
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QTextStream t = new QTextStream(f);
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if ( code >= Codec )
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t.setCodec( (QTextCodec) codecList.get(code-Codec) );
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else if ( code == Uni )
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t.setEncoding( QTextStream.Unicode );
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else if ( code == MBug )
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t.setEncoding( QTextStream.UnicodeReverse );
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else if ( code == Lat1 )
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t.setEncoding( QTextStream.Latin1 );
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else if ( code == Guess ) {
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f = new QFile(fileName);
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f.open(QIODevice.IO_ReadOnly);
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StringBuffer buffer = new StringBuffer();
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int l = 256;
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l=(int)f.readBlock(buffer,l);
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QTextCodec codec = QTextCodec.codecForContent(buffer.toString(), l);
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if ( codec != null ) {
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QMessageBox.information(this,"Encoding","Codec: "+codec.name());
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t.setCodec( codec );
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}
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}
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e.setText( t.read() );
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f.close();
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e.setAutoUpdate( true );
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e.repaint();
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setCaption( fileName );
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changed = false;
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}
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void openAsEncoding( int code )
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{
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//storing filename (proper save) is left as an exercise...
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String fn = QFileDialog.getOpenFileName( "", "", this );
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if ( !fn.equals("") )
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load( fn, code );
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}
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boolean save()
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{
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//storing filename (proper save) is left as an exercise...
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String fn = QFileDialog.getSaveFileName( "", "", this );
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if ( !fn.equals("") )
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return saveAs( fn );
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return false;
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}
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void saveAsEncoding( int code )
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{
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//storing filename (proper save) is left as an exercise...
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String fn = QFileDialog.getSaveFileName( "", "", this );
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if ( !fn.equals("") )
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saveAs( fn, code );
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}
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void addEncoding()
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{
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String fn = QFileDialog.getOpenFileName( "", "*.map", this );
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if ( !fn.equals("") ) {
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QFile f = new QFile(fn);
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if (f.open(QIODevice.IO_ReadOnly)) {
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if (QTextCodec.loadCharmap(f) != null) {
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rebuildCodecList();
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} else {
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QMessageBox.warning(null,"Charmap error",
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"The file did not contain a valid charmap.\n\n"
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+ "A charmap file should look like this:\n"
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+ " <code_set_name> thename\n"
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+ " <escape_char> /\n"
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+ " % alias thealias\n"
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+ " CHARMAP\n"
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+ " <tokenname> /x12 <U3456>\n"
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+ " <tokenname> /xAB/x12 <U0023>\n"
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+ " ...\n"
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+ " END CHARMAP\n"
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);
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}
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}
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}
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}
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boolean saveAs( String fileName )
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{
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return saveAs(fileName, -1);
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}
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boolean saveAs( String fileName, int code )
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{
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QFile f = new QFile( fileName );
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if ( no_writing || !f.open( QIODevice.IO_WriteOnly ) ) {
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QMessageBox.warning(this,"I/O Error",
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"The file could not be opened.\n\n"
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+fileName);
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return false;
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}
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QTextStream t = new QTextStream(f);
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if ( code >= Codec )
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t.setCodec( (QTextCodec) codecList.get(code-Codec) );
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else if ( code == Uni )
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t.setEncoding( QTextStream.Unicode );
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else if ( code == MBug )
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t.setEncoding( QTextStream.UnicodeReverse );
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else if ( code == Lat1 )
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t.setEncoding( QTextStream.Latin1 );
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t.writeRawBytes(e.text(), e.text().length());
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f.close();
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setCaption( fileName );
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changed = false;
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return true;
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}
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void print()
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{
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if ( printer.setup(this) ) { // opens printer dialog
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printer.setFullPage(true); // we'll set our own margins
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QPainter p = new QPainter();
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p.begin( printer ); // paint on printer
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p.setFont( e.font() );
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QFontMetrics fm = p.fontMetrics();
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QPaintDeviceMetrics metrics = new QPaintDeviceMetrics( printer ); // need width/height
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// of printer surface
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int MARGIN = metrics.logicalDpiX() / 2; // half-inch margin
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int yPos = MARGIN; // y position for each line
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for( int i = 0 ; i < e.numLines() ; i++ ) {
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if ( printer.aborted() )
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break;
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if ( yPos + fm.lineSpacing() > metrics.height() - MARGIN ) {
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// no more room on this page
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if ( !printer.newPage() ) // start new page
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break; // some error
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yPos = MARGIN; // back to top of page
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}
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p.drawText( MARGIN, yPos, metrics.width() - 2*MARGIN,
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fm.lineSpacing(), ExpandTabs, e.textLine( i ) );
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yPos += fm.lineSpacing();
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}
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p.end(); // send job to printer
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}
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}
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protected void resizeEvent( QResizeEvent event )
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{
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if ( e != null && m != null )
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e.setGeometry( 0, m.height(), width(), height() - m.height() );
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}
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protected void closeEvent( QCloseEvent event )
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{
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event.accept();
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if ( changed ) { // the text has been changed
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switch ( QMessageBox.warning( this, "Qwerty",
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"Save changes to Document?",
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tr("&Yes"),
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tr("&No"),
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tr("Cancel"),
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0, 2) ) {
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case 0: // yes
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if ( save() )
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event.accept();
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else
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event.ignore();
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break;
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case 1: // no
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event.accept();
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break;
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default: // cancel
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event.ignore();
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break;
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}
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}
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}
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void toUpper()
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{
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e.setText(e.text().toUpperCase());
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}
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void toLower()
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{
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e.setText(e.text().toLowerCase());
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}
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void textChanged()
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{
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changed = true;
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}
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}
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