textedit.cpp

Linux下的基于X11的图形开发环境。

/****************************************************************************
** $Id: qt/textedit.cpp   3.1.1   edited Nov 8 10:35 $
**
** 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 "textedit.h"

#include <qtextedit.h>
#include <qaction.h>
#include <qmenubar.h>
#include <qpopupmenu.h>
#include <qtoolbar.h>
#include <qtabwidget.h>
#include <qapplication.h>
#include <qfontdatabase.h>
#include <qcombobox.h>
#include <qlineedit.h>
#include <qfileinfo.h>
#include <qfile.h>
#include <qfiledialog.h>
#include <qprinter.h>
#include <qpaintdevicemetrics.h>
#include <qsimplerichtext.h>
#include <qcolordialog.h>
#include <qpainter.h>

TextEdit::TextEdit( QWidget *parent, const char *name )
    : QMainWindow( parent, name, 0 )
{
    setupFileActions();
    setupEditActions();
    setupTextActions();

    tabWidget = new QTabWidget( this );
    connect( tabWidget, SIGNAL( currentChanged( QWidget * ) ),
	     this, SLOT( editorChanged( QWidget * ) ) );
    setCentralWidget( tabWidget );
}

void TextEdit::setupFileActions()
{
    QToolBar *tb = new QToolBar( this );
    QPopupMenu *menu = new QPopupMenu( this );
    menuBar()->insertItem( tr( "&File" ), menu );

    QAction *a;
    a = new QAction( tr( "New" ), QPixmap( "textdrawing/filenew.png" ), tr( "&New..." ), CTRL + Key_N, this, "fileNew" );
    connect( a, SIGNAL( activated() ), this, SLOT( fileNew() ) );
    a->addTo( tb );
    a->addTo( menu );
    a = new QAction( tr( "Open" ), QPixmap( "textdrawing/fileopen.png" ), tr( "&Open..." ), CTRL + Key_O, this, "fileOpen" );
    connect( a, SIGNAL( activated() ), this, SLOT( fileOpen() ) );
    a->addTo( tb );
    a->addTo( menu );
    menu->insertSeparator();
    a = new QAction( tr( "Save" ), QPixmap( "textdrawing/filesave.png" ), tr( "&Save..." ), CTRL + Key_S, this, "fileSave" );
    connect( a, SIGNAL( activated() ), this, SLOT( fileSave() ) );
    a->addTo( tb );
    a->addTo( menu );
    a = new QAction( tr( "Save As" ), QPixmap(), tr( "Save &As..." ), 0, this, "fileSaveAs" );
    connect( a, SIGNAL( activated() ), this, SLOT( fileSaveAs() ) );
    a->addTo( menu );
    menu->insertSeparator();
    a = new QAction( tr( "Print" ), QPixmap( "textdrawing/print.png" ), tr( "&Print..." ), CTRL + Key_P, this, "filePrint" );
    connect( a, SIGNAL( activated() ), this, SLOT( filePrint() ) );
    a->addTo( tb );
    a->addTo( menu );
    a = new QAction( tr( "Close" ), QPixmap(), tr( "&Close" ), 0, this, "fileClose" );
    connect( a, SIGNAL( activated() ), this, SLOT( fileClose() ) );
    a->addTo( menu );
}

void TextEdit::setupEditActions()
{
    QToolBar *tb = new QToolBar( this );
    QPopupMenu *menu = new QPopupMenu( this );
    menuBar()->insertItem( tr( "&Edit" ), menu );

    QAction *a;
    a = new QAction( tr( "Undo" ), QPixmap( "textdrawing/undo.png" ), tr( "&Undo" ), CTRL + Key_Z, this, "editUndo" );
    connect( a, SIGNAL( activated() ), this, SLOT( editUndo() ) );
    a->addTo( tb );
    a->addTo( menu );
    a = new QAction( tr( "Redo" ), QPixmap( "textdrawing/redo.png" ), tr( "&Redo" ), CTRL + Key_Y, this, "editRedo" );
    connect( a, SIGNAL( activated() ), this, SLOT( editRedo() ) );
    a->addTo( tb );
    a->addTo( menu );
    menu->insertSeparator();
    a = new QAction( tr( "Cut" ), QPixmap( "textdrawing/editcut.png" ), tr( "&Cut" ), CTRL + Key_X, this, "editCut" );
    connect( a, SIGNAL( activated() ), this, SLOT( editCut() ) );
    a->addTo( tb );
    a->addTo( menu );
    a = new QAction( tr( "Copy" ), QPixmap( "textdrawing/editcopy.png" ), tr( "C&opy" ), CTRL + Key_C, this, "editCopy" );
    connect( a, SIGNAL( activated() ), this, SLOT( editUndo() ) );
    a->addTo( tb );
    a->addTo( menu );
    a = new QAction( tr( "Paste" ), QPixmap( "textdrawing/editpaste.png" ), tr( "&Paste" ), CTRL + Key_V, this, "editPaste" );
    connect( a, SIGNAL( activated() ), this, SLOT( editPaste() ) );
    a->addTo( tb );
    a->addTo( menu );
}

void TextEdit::setupTextActions()
{
    QToolBar *tb = new QToolBar( this );
    QPopupMenu *menu = new QPopupMenu( this );
    menuBar()->insertItem( tr( "For&mat" ), menu );

    comboStyle = new QComboBox( FALSE, tb );
    comboStyle->insertItem( tr("Standard") );
    comboStyle->insertItem( tr("Bullet List (Disc)") );
    comboStyle->insertItem( tr("Bullet List (Circle)") );
    comboStyle->insertItem( tr("Bullet List (Square)") );
    comboStyle->insertItem( tr("Ordered List (Decimal)") );
    comboStyle->insertItem( tr("Ordered List (Alpha lower)") );
    comboStyle->insertItem( tr("Ordered List (Alpha upper)") );
    connect( comboStyle, SIGNAL( activated( int ) ),
	     this, SLOT( textStyle( int ) ) );

    comboFont = new QComboBox( TRUE, tb );
    QFontDatabase db;
    comboFont->insertStringList( db.families() );
    connect( comboFont, SIGNAL( activated( const QString & ) ),
	     this, SLOT( textFamily( const QString & ) ) );
    comboFont->lineEdit()->setText( QApplication::font().family() );

    comboSize = new QComboBox( TRUE, tb );
    QValueList<int> sizes = db.standardSizes();
    QValueList<int>::Iterator it = sizes.begin();
    for ( ; it != sizes.end(); ++it )
	comboSize->insertItem( QString::number( *it ) );
    connect( comboSize, SIGNAL( activated( const QString & ) ),
	     this, SLOT( textSize( const QString & ) ) );
    comboSize->lineEdit()->setText( QString::number( QApplication::font().pointSize() ) );

    actionTextBold = new QAction( tr( "Bold" ), QPixmap( "textdrawing/textbold.png" ), tr( "&Bold" ), CTRL + Key_B, this, "textBold" );
    connect( actionTextBold, SIGNAL( activated() ), this, SLOT( textBold() ) );
    actionTextBold->addTo( tb );
    actionTextBold->addTo( menu );
    actionTextBold->setToggleAction( TRUE );
    actionTextItalic = new QAction( tr( "Italic" ), QPixmap( "textdrawing/textitalic.png" ), tr( "&Italic" ), CTRL + Key_I, this, "textItalic" );
    connect( actionTextItalic, SIGNAL( activated() ), this, SLOT( textItalic() ) );
    actionTextItalic->addTo( tb );
    actionTextItalic->addTo( menu );
    actionTextItalic->setToggleAction( TRUE );
    actionTextUnderline = new QAction( tr( "Underline" ), QPixmap( "textdrawing/textunderline.png" ), tr( "&Underline" ), CTRL + Key_U, this, "textUnderline" );
    connect( actionTextUnderline, SIGNAL( activated() ), this, SLOT( textUnderline() ) );
    actionTextUnderline->addTo( tb );
    actionTextUnderline->addTo( menu );
    actionTextUnderline->setToggleAction( TRUE );
    menu->insertSeparator();

    QActionGroup *grp = new QActionGroup( this );
    grp->setExclusive( TRUE );
    connect( grp, SIGNAL( selected( QAction* ) ), this, SLOT( textAlign( QAction* ) ) );

    actionAlignLeft = new QAction( tr( "Left" ), QPixmap( "textdrawing/textleft.png" ), tr( "&Left" ), CTRL + Key_L, grp, "textLeft" );
    actionAlignLeft->addTo( tb );
    actionAlignLeft->addTo( menu );
    actionAlignLeft->setToggleAction( TRUE );
    actionAlignCenter = new QAction( tr( "Center" ), QPixmap( "textdrawing/textcenter.png" ), tr( "C&enter" ), CTRL + Key_M, grp, "textCenter" );
    actionAlignCenter->addTo( tb );
    actionAlignCenter->addTo( menu );
    actionAlignCenter->setToggleAction( TRUE );
    actionAlignRight = new QAction( tr( "Right" ), QPixmap( "textdrawing/textright.png" ), tr( "&Right" ), CTRL + Key_R, grp, "textRight" );
    actionAlignRight->addTo( tb );
    actionAlignRight->addTo( menu );
    actionAlignRight->setToggleAction( TRUE );
    actionAlignJustify = new QAction( tr( "Justify" ), QPixmap( "textdrawing/textjustify.png" ), tr( "&Justify" ), CTRL + Key_J, grp, "textjustify" );
    actionAlignJustify->addTo( tb );
    actionAlignJustify->addTo( menu );
    actionAlignJustify->setToggleAction( TRUE );

    menu->insertSeparator();

    QPixmap pix( 16, 16 );
    pix.fill( black );
    actionTextColor = new QAction( tr( "Color" ), pix, tr( "&Color..." ), 0, this, "textColor" );
    connect( actionTextColor, SIGNAL( activated() ), this, SLOT( textColor() ) );
    actionTextColor->addTo( tb );
    actionTextColor->addTo( menu );
}

void TextEdit::load( const QString &f )
{
    if ( !QFile::exists( f ) )
	return;
    QTextEdit *edit = new QTextEdit( tabWidget );
    doConnections( edit );
    tabWidget->addTab( edit, QFileInfo( f ).fileName() );

    QFile fl( f );
    fl.open( IO_ReadOnly );
    QByteArray array = fl.readAll();
    array.resize( array.size() +1 );
    array[ (int)array.size() - 1 ] = '\0';
    QString text = ( f.find( "bidi.txt" ) != -1 ? QString::fromUtf8( array.data() ) : QString::fromLatin1( array.data() ) );
    edit->setText( text );

    edit->viewport()->setFocus();
    edit->setTextFormat( Qt::RichText );
}

QTextEdit *TextEdit::currentEditor() const
{
    if ( tabWidget->currentPage() &&
	 tabWidget->currentPage()->inherits( "QTextEdit" ) )
	return (QTextEdit*)tabWidget->currentPage();
    return 0;
}

void TextEdit::doConnections( QTextEdit *e )
{
    connect( e, SIGNAL( currentFontChanged( const QFont & ) ),
	     this, SLOT( fontChanged( const QFont & ) ) );
    connect( e, SIGNAL( currentColorChanged( const QColor & ) ),
	     this, SLOT( colorChanged( const QColor & ) ) );
    connect( e, SIGNAL( currentAlignmentChanged( int ) ),
	     this, SLOT( alignmentChanged( int ) ) );
}

void TextEdit::fileNew()
{
    QTextEdit *edit = new QTextEdit( tabWidget );
    doConnections( edit );
    tabWidget->addTab( edit, tr( "noname" ) );
    tabWidget->showPage( edit );
    edit->viewport()->setFocus();
}

void TextEdit::fileOpen()
{
    QString fn = QFileDialog::getOpenFileName( QString::null, tr( "HTML-Files (*.htm *.html);;All Files (*)" ), this );
    if ( !fn.isEmpty() )
	load( fn );