| 1 | /****************************************************************************
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| 2 | ** $Id: qwerty.cpp 2 2005-11-16 15:49:26Z dmik $
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| 3 | **
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| 4 | ** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
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| 5 | **
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| 6 | ** This file is part of an example program for Qt. This example
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| 7 | ** program may be used, distributed and modified without limitation.
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| 8 | **
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| 9 | *****************************************************************************/
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| 10 |
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| 11 | #include "qwerty.h"
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| 12 | #include <qapplication.h>
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| 13 | #include <qfile.h>
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| 14 | #include <qfiledialog.h>
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| 15 | #include <qpopupmenu.h>
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| 16 | #include <qtextstream.h>
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| 17 | #include <qpainter.h>
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| 18 | #include <qmessagebox.h>
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| 19 | #include <qpaintdevicemetrics.h>
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| 20 | #include <qptrlist.h>
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| 21 | #include <qfontdialog.h>
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| 22 |
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| 23 | #include <qtextcodec.h>
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| 24 |
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| 25 | const bool no_writing = FALSE;
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| 26 |
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| 27 | static QPtrList<QTextCodec> *codecList = 0;
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| 28 |
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| 29 | enum { Uni = 0, MBug = 1, Lat1 = 2, Local = 3, Guess = 4, Codec = 5 };
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| 30 |
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| 31 |
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| 32 | Editor::Editor( QWidget * parent , const char * name )
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| 33 | : QWidget( parent, name, WDestructiveClose )
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| 34 | {
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| 35 | m = new QMenuBar( this, "menu" );
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| 36 |
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| 37 | QPopupMenu * file = new QPopupMenu();
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| 38 | Q_CHECK_PTR( file );
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| 39 | m->insertItem( "&File", file );
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| 40 |
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| 41 | file->insertItem( "&New", this, SLOT(newDoc()), ALT+Key_N );
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| 42 | file->insertItem( "&Open...", this, SLOT(load()), ALT+Key_O );
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| 43 | file->insertItem( "&Save...", this, SLOT(save()), ALT+Key_S );
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| 44 | file->insertSeparator();
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| 45 | open_as = new QPopupMenu();
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| 46 | file->insertItem( "Open &As", open_as );
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| 47 | save_as = new QPopupMenu();
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| 48 | file->insertItem( "Sa&ve As", save_as );
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| 49 | file->insertItem( "Add &Encoding", this, SLOT(addEncoding()) );
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| 50 | #ifndef QT_NO_PRINTER
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| 51 | file->insertSeparator();
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| 52 | file->insertItem( "&Print...", this, SLOT(print()), ALT+Key_P );
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| 53 | #endif
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| 54 | file->insertSeparator();
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| 55 | file->insertItem( "&Close", this, SLOT(close()),ALT+Key_W );
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| 56 | file->insertItem( "&Quit", qApp, SLOT(closeAllWindows()), ALT+Key_Q );
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| 57 |
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| 58 | connect( save_as, SIGNAL(activated(int)), this, SLOT(saveAsEncoding(int)) );
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| 59 | connect( open_as, SIGNAL(activated(int)), this, SLOT(openAsEncoding(int)) );
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| 60 | rebuildCodecList();
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| 61 |
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| 62 | QPopupMenu * edit = new QPopupMenu();
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| 63 | Q_CHECK_PTR( edit );
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| 64 | m->insertItem( "&Edit", edit );
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| 65 |
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| 66 | edit->insertItem( "To &Uppercase", this, SLOT(toUpper()), ALT+Key_U );
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| 67 | edit->insertItem( "To &Lowercase", this, SLOT(toLower()), ALT+Key_L );
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| 68 | #ifndef QT_NO_FONTDIALOG
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| 69 | edit->insertSeparator();
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| 70 | edit->insertItem( "&Select Font" , this, SLOT(font()), ALT+Key_T );
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| 71 | #endif
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| 72 | changed = FALSE;
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| 73 | e = new QMultiLineEdit( this, "editor" );
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| 74 | connect( e, SIGNAL( textChanged() ), this, SLOT( textChanged() ) );
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| 75 |
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| 76 | // We use Unifont - if you have it installed you'll see all
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| 77 | // Unicode character glyphs.
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| 78 | //
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| 79 | // Unifont only comes in one pixel size, so we cannot let
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| 80 | // it change pixel size as the display DPI changes.
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| 81 | //
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| 82 | QFont unifont("unifont",16,50); unifont.setPixelSize(16);
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| 83 | e->setFont( unifont );
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| 84 |
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| 85 | e->setFocus();
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| 86 | }
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| 87 |
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| 88 | Editor::~Editor()
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| 89 | {
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| 90 | }
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| 91 |
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| 92 | void Editor::font()
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| 93 | {
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| 94 | #ifndef QT_NO_FONTDIALOG
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| 95 | bool ok;
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| 96 | QFont f = QFontDialog::getFont( &ok, e->font() );
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| 97 | if ( ok ) {
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| 98 | e->setFont( f );
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| 99 | }
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| 100 | #endif
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| 101 | }
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| 102 |
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| 103 |
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| 104 |
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| 105 | void Editor::rebuildCodecList()
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| 106 | {
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| 107 | delete codecList;
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| 108 | codecList = new QPtrList<QTextCodec>;
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| 109 | QTextCodec *codec;
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| 110 | int i;
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| 111 | for (i = 0; (codec = QTextCodec::codecForIndex(i)); i++)
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| 112 | codecList->append( codec );
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| 113 | int n = codecList->count();
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| 114 | for (int pm=0; pm<2; pm++) {
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| 115 | QPopupMenu* menu = pm ? open_as : save_as;
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| 116 | menu->clear();
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| 117 | QString local = "Local (";
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| 118 | local += QTextCodec::codecForLocale()->name();
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| 119 | local += ")";
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| 120 | menu->insertItem( local, Local );
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| 121 | menu->insertItem( "Unicode", Uni );
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| 122 | menu->insertItem( "Latin1", Lat1 );
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| 123 | menu->insertItem( "Microsoft Unicode", MBug );
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| 124 | if ( pm )
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| 125 | menu->insertItem( "[guess]", Guess );
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| 126 | for ( i = 0; i < n; i++ )
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| 127 | menu->insertItem( codecList->at(i)->name(), Codec + i );
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| 128 | }
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| 129 | }
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| 130 |
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| 131 | void Editor::newDoc()
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| 132 | {
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| 133 | Editor *ed = new Editor;
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| 134 | if ( qApp->desktop()->size().width() < 450
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| 135 | || qApp->desktop()->size().height() < 450 ) {
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| 136 | ed->showMaximized();
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| 137 | } else {
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| 138 | ed->resize( 400, 400 );
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| 139 | ed->show();
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| 140 | }
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| 141 | }
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| 142 |
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| 143 |
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| 144 | void Editor::load()
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| 145 | {
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| 146 | #ifndef QT_NO_FILEDIALOG
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| 147 | QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
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| 148 | if ( !fn.isEmpty() )
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| 149 | load( fn, -1 );
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| 150 | #endif
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| 151 | }
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| 152 |
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| 153 | void Editor::load( const QString& fileName, int code )
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| 154 | {
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| 155 | QFile f( fileName );
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| 156 | if ( !f.open( IO_ReadOnly ) )
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| 157 | return;
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| 158 |
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| 159 | e->setAutoUpdate( FALSE );
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| 160 |
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| 161 | QTextStream t(&f);
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| 162 | if ( code >= Codec )
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| 163 | t.setCodec( codecList->at(code-Codec) );
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| 164 | else if ( code == Uni )
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| 165 | t.setEncoding( QTextStream::Unicode );
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| 166 | else if ( code == MBug )
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| 167 | t.setEncoding( QTextStream::UnicodeReverse );
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| 168 | else if ( code == Lat1 )
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| 169 | t.setEncoding( QTextStream::Latin1 );
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| 170 | else if ( code == Guess ) {
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| 171 | QFile f(fileName);
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| 172 | f.open(IO_ReadOnly);
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| 173 | char buffer[256];
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| 174 | int l = 256;
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| 175 | l=f.readBlock(buffer,l);
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| 176 | QTextCodec* codec = QTextCodec::codecForContent(buffer, l);
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| 177 | if ( codec ) {
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| 178 | QMessageBox::information(this,"Encoding",QString("Codec: ")+codec->name());
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| 179 | t.setCodec( codec );
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| 180 | }
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| 181 | }
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| 182 | e->setText( t.read() );
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| 183 | f.close();
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| 184 |
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| 185 | e->setAutoUpdate( TRUE );
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| 186 | e->repaint();
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| 187 | setCaption( fileName );
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| 188 |
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| 189 | changed = FALSE;
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| 190 | }
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| 191 |
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| 192 | void Editor::openAsEncoding( int code )
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| 193 | {
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| 194 | #ifndef QT_NO_FILEDIALOG
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| 195 | //storing filename (proper save) is left as an exercise...
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| 196 | QString fn = QFileDialog::getOpenFileName( QString::null, QString::null, this );
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| 197 | if ( !fn.isEmpty() )
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| 198 | (void) load( fn, code );
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| 199 | #endif
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| 200 | }
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| 201 |
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| 202 | bool Editor::save()
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| 203 | {
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| 204 | #ifndef QT_NO_FILEDIALOG
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| 205 | //storing filename (proper save) is left as an exercise...
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| 206 | QString fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
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| 207 | if ( !fn.isEmpty() )
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| 208 | return saveAs( fn );
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| 209 | return FALSE;
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| 210 | #endif
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| 211 | }
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| 212 |
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| 213 | void Editor::saveAsEncoding( int code )
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| 214 | {
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| 215 | #ifndef QT_NO_FILEDIALOG
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| 216 | //storing filename (proper save) is left as an exercise...
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| 217 | QString fn = QFileDialog::getSaveFileName( QString::null, QString::null, this );
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| 218 | if ( !fn.isEmpty() )
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| 219 | (void) saveAs( fn, code );
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| 220 | #endif
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| 221 | }
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| 222 |
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| 223 | void Editor::addEncoding()
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| 224 | {
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| 225 | #ifndef QT_NO_FILEDIALOG
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| 226 | QString fn = QFileDialog::getOpenFileName( QString::null, "*.map", this );
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| 227 | if ( !fn.isEmpty() ) {
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| 228 | QFile f(fn);
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| 229 | if (f.open(IO_ReadOnly)) {
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| 230 | if (QTextCodec::loadCharmap(&f)) {
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| 231 | rebuildCodecList();
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| 232 | } else {
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| 233 | QMessageBox::warning(0,"Charmap error",
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| 234 | "The file did not contain a valid charmap.\n\n"
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| 235 | "A charmap file should look like this:\n"
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| 236 | " <code_set_name> thename\n"
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| 237 | " <escape_char> /\n"
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| 238 | " % alias thealias\n"
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| 239 | " CHARMAP\n"
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| 240 | " <tokenname> /x12 <U3456>\n"
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| 241 | " <tokenname> /xAB/x12 <U0023>\n"
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| 242 | " ...\n"
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| 243 | " END CHARMAP\n"
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| 244 | );
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| 245 | }
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| 246 | }
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| 247 | }
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| 248 | #endif
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| 249 | }
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| 250 |
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| 251 |
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| 252 | bool Editor::saveAs( const QString& fileName, int code )
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| 253 | {
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| 254 | QFile f( fileName );
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| 255 | if ( no_writing || !f.open( IO_WriteOnly ) ) {
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| 256 | QMessageBox::warning(this,"I/O Error",
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| 257 | QString("The file could not be opened.\n\n")
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| 258 | +fileName);
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| 259 | return FALSE;
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| 260 | }
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| 261 | QTextStream t(&f);
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| 262 | if ( code >= Codec )
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| 263 | t.setCodec( codecList->at(code-Codec) );
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| 264 | else if ( code == Uni )
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| 265 | t.setEncoding( QTextStream::Unicode );
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| 266 | else if ( code == MBug )
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| 267 | t.setEncoding( QTextStream::UnicodeReverse );
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| 268 | else if ( code == Lat1 )
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| 269 | t.setEncoding( QTextStream::Latin1 );
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| 270 | t << e->text();
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| 271 | f.close();
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| 272 | setCaption( fileName );
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| 273 | changed = FALSE;
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| 274 | return TRUE;
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| 275 | }
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| 276 |
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| 277 | void Editor::print()
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| 278 | {
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| 279 | #ifndef QT_NO_PRINTER
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| 280 | if ( printer.setup(this) ) { // opens printer dialog
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| 281 | printer.setFullPage(TRUE); // we'll set our own margins
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| 282 | QPainter p;
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| 283 | p.begin( &printer ); // paint on printer
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| 284 | p.setFont( e->font() );
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| 285 | QFontMetrics fm = p.fontMetrics();
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| 286 | QPaintDeviceMetrics metrics( &printer ); // need width/height
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| 287 | // of printer surface
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| 288 | const int MARGIN = metrics.logicalDpiX() / 2; // half-inch margin
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| 289 | int yPos = MARGIN; // y position for each line
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| 290 |
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| 291 | for( int i = 0 ; i < e->numLines() ; i++ ) {
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| 292 | if ( printer.aborted() )
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| 293 | break;
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| 294 | if ( yPos + fm.lineSpacing() > metrics.height() - MARGIN ) {
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| 295 | // no more room on this page
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| 296 | if ( !printer.newPage() ) // start new page
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| 297 | break; // some error
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| 298 | yPos = MARGIN; // back to top of page
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| 299 | }
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| 300 | p.drawText( MARGIN, yPos, metrics.width() - 2*MARGIN,
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| 301 | fm.lineSpacing(), ExpandTabs, e->textLine( i ) );
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| 302 | yPos += fm.lineSpacing();
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| 303 | }
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| 304 | p.end(); // send job to printer
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| 305 | }
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| 306 | #endif
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| 307 | }
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| 308 |
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| 309 | void Editor::resizeEvent( QResizeEvent * )
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| 310 | {
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| 311 | if ( e && m )
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| 312 | e->setGeometry( 0, m->height(), width(), height() - m->height() );
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| 313 | }
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| 314 |
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| 315 | void Editor::closeEvent( QCloseEvent *event )
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| 316 | {
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| 317 | event->accept();
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| 318 |
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| 319 | if ( changed ) { // the text has been changed
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| 320 | switch ( QMessageBox::warning( this, "Qwerty",
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| 321 | "Save changes to Document?",
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| 322 | tr("&Yes"),
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| 323 | tr("&No"),
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| 324 | tr("Cancel"),
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| 325 | 0, 2) ) {
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| 326 | case 0: // yes
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| 327 | if ( save() )
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| 328 | event->accept();
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| 329 | else
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| 330 | event->ignore();
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| 331 | break;
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| 332 | case 1: // no
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| 333 | event->accept();
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| 334 | break;
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| 335 | default: // cancel
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| 336 | event->ignore();
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| 337 | break;
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| 338 | }
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| 339 | }
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| 340 | }
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| 341 |
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| 342 | void Editor::toUpper()
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| 343 | {
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| 344 | e->setText(e->text().upper());
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| 345 | }
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| 346 |
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| 347 | void Editor::toLower()
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| 348 | {
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| 349 | e->setText(e->text().lower());
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| 350 | }
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| 351 |
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| 352 | void Editor::textChanged()
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| 353 | {
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| 354 | changed = TRUE;
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| 355 | }
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