source: trunk/demos/textedit/textedit.cpp@ 564

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**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
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** This file is part of the demonstration applications of the Qt Toolkit.
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** Foundation and appearing in the file LICENSE.LGPL included in the
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#include "textedit.h"

#include <QAction>
#include <QApplication>
#include <QClipboard>
#include <QColorDialog>
#include <QComboBox>
#include <QFontComboBox>
#include <QFile>
#include <QFileDialog>
#include <QFileInfo>
#include <QFontDatabase>
#include <QMenu>
#include <QMenuBar>
#include <QPrintDialog>
#include <QPrinter>
#include <QTextCodec>
#include <QTextEdit>
#include <QToolBar>
#include <QTextCursor>
#include <QTextDocumentWriter>
#include <QTextList>
#include <QtDebug>
#include <QCloseEvent>
#include <QMessageBox>
#include <QPrintPreviewDialog>

#ifdef Q_WS_MAC
const QString rsrcPath = ":/images/mac";
#else
const QString rsrcPath = ":/images/win";
#endif

TextEdit::TextEdit(QWidget *parent)
    : QMainWindow(parent)
{
    setToolButtonStyle(Qt::ToolButtonFollowStyle);
    setupFileActions();
    setupEditActions();
    setupTextActions();

    {
        QMenu *helpMenu = new QMenu(tr("Help"), this);
        menuBar()->addMenu(helpMenu);
        helpMenu->addAction(tr("About"), this, SLOT(about()));
        helpMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt()));
    }

    textEdit = new QTextEdit(this);
    connect(textEdit, SIGNAL(currentCharFormatChanged(QTextCharFormat)),
            this, SLOT(currentCharFormatChanged(QTextCharFormat)));
    connect(textEdit, SIGNAL(cursorPositionChanged()),
            this, SLOT(cursorPositionChanged()));

    setCentralWidget(textEdit);
    textEdit->setFocus();
    setCurrentFileName(QString());

    fontChanged(textEdit->font());
    colorChanged(textEdit->textColor());
    alignmentChanged(textEdit->alignment());

    connect(textEdit->document(), SIGNAL(modificationChanged(bool)),
            actionSave, SLOT(setEnabled(bool)));
    connect(textEdit->document(), SIGNAL(modificationChanged(bool)),
            this, SLOT(setWindowModified(bool)));
    connect(textEdit->document(), SIGNAL(undoAvailable(bool)),
            actionUndo, SLOT(setEnabled(bool)));
    connect(textEdit->document(), SIGNAL(redoAvailable(bool)),
            actionRedo, SLOT(setEnabled(bool)));

    setWindowModified(textEdit->document()->isModified());
    actionSave->setEnabled(textEdit->document()->isModified());
    actionUndo->setEnabled(textEdit->document()->isUndoAvailable());
    actionRedo->setEnabled(textEdit->document()->isRedoAvailable());

    connect(actionUndo, SIGNAL(triggered()), textEdit, SLOT(undo()));
    connect(actionRedo, SIGNAL(triggered()), textEdit, SLOT(redo()));

    actionCut->setEnabled(false);
    actionCopy->setEnabled(false);

    connect(actionCut, SIGNAL(triggered()), textEdit, SLOT(cut()));
    connect(actionCopy, SIGNAL(triggered()), textEdit, SLOT(copy()));
    connect(actionPaste, SIGNAL(triggered()), textEdit, SLOT(paste()));

    connect(textEdit, SIGNAL(copyAvailable(bool)), actionCut, SLOT(setEnabled(bool)));
    connect(textEdit, SIGNAL(copyAvailable(bool)), actionCopy, SLOT(setEnabled(bool)));

#ifndef QT_NO_CLIPBOARD
    connect(QApplication::clipboard(), SIGNAL(dataChanged()), this, SLOT(clipboardDataChanged()));
#endif

    QString initialFile = ":/example.html";
    const QStringList args = QCoreApplication::arguments();
    if (args.count() == 2)
        initialFile = args.at(1);

    if (!load(initialFile))
        fileNew();
}

void TextEdit::closeEvent(QCloseEvent *e)
{
    if (maybeSave())
        e->accept();
    else
        e->ignore();
}

void TextEdit::setupFileActions()
{
    QToolBar *tb = new QToolBar(this);
    tb->setWindowTitle(tr("File Actions"));
    addToolBar(tb);

    QMenu *menu = new QMenu(tr("&File"), this);
    menuBar()->addMenu(menu);

    QAction *a;

    QIcon newIcon = QIcon::fromTheme("document-new", QIcon(rsrcPath + "/filenew.png"));
    a = new QAction( newIcon, tr("&New"), this);
    a->setPriority(QAction::LowPriority);
    a->setShortcut(QKeySequence::New);
    connect(a, SIGNAL(triggered()), this, SLOT(fileNew()));
    tb->addAction(a);
    menu->addAction(a);

    a = new QAction(QIcon::fromTheme("document-open", QIcon(rsrcPath + "/fileopen.png")),
                    tr("&Open..."), this);
    a->setShortcut(QKeySequence::Open);
    connect(a, SIGNAL(triggered()), this, SLOT(fileOpen()));
    tb->addAction(a);
    menu->addAction(a);

    menu->addSeparator();

    actionSave = a = new QAction(QIcon::fromTheme("document-save", QIcon(rsrcPath + "/filesave.png")),
                                 tr("&Save"), this);
    a->setShortcut(QKeySequence::Save);
    connect(a, SIGNAL(triggered()), this, SLOT(fileSave()));
    a->setEnabled(false);
    tb->addAction(a);
    menu->addAction(a);

    a = new QAction(tr("Save &As..."), this);
    a->setPriority(QAction::LowPriority);
    connect(a, SIGNAL(triggered()), this, SLOT(fileSaveAs()));
    menu->addAction(a);
    menu->addSeparator();

#ifndef QT_NO_PRINTER
    a = new QAction(QIcon::fromTheme("document-print", QIcon(rsrcPath + "/fileprint.png")),
                    tr("&Print..."), this);
    a->setPriority(QAction::LowPriority);    
    a->setShortcut(QKeySequence::Print);
    connect(a, SIGNAL(triggered()), this, SLOT(filePrint()));
    tb->addAction(a);
    menu->addAction(a);

    a = new QAction(QIcon::fromTheme("fileprint", QIcon(rsrcPath + "/fileprint.png")),
                    tr("Print Preview..."), this);
    connect(a, SIGNAL(triggered()), this, SLOT(filePrintPreview()));
    menu->addAction(a);

    a = new QAction(QIcon::fromTheme("exportpdf", QIcon(rsrcPath + "/exportpdf.png")),
    tr("&Export PDF..."), this);
    a->setPriority(QAction::LowPriority);
    a->setShortcut(Qt::CTRL + Qt::Key_D);
    connect(a, SIGNAL(triggered()), this, SLOT(filePrintPdf()));
    tb->addAction(a);
    menu->addAction(a);

    menu->addSeparator();
#endif

    a = new QAction(tr("&Quit"), this);
    a->setShortcut(Qt::CTRL + Qt::Key_Q);
    connect(a, SIGNAL(triggered()), this, SLOT(close()));
    menu->addAction(a);
}

void TextEdit::setupEditActions()
{
    QToolBar *tb = new QToolBar(this);
    tb->setWindowTitle(tr("Edit Actions"));
    addToolBar(tb);
    QMenu *menu = new QMenu(tr("&Edit"), this);
    menuBar()->addMenu(menu);

    QAction *a;
    a = actionUndo = new QAction(QIcon::fromTheme("edit-undo", QIcon(rsrcPath + "/editundo.png")),
                                              tr("&Undo"), this);