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qt5base-lts/examples/widgets/richtext/textedit/textedit.cpp
Lars Knoll fa8d021fa6 Convert a couple of APIs to use views 
Try to get rid of APIs that use raw 'const {char, QChar} *, length'
pairs. Instead, use QByteArrayView or QStringView.

As QStringConverter is a new class, simply change the API to what we'd like
to have. Also adjust hidden API in QStringBuilder and friends.

Change-Id: I897d47f63a7b965f5574a1e51da64147f9e981f6
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2020-10-06 11:16:36 +02:00

894 lines
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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QActionGroup>
#include <QApplication>
#include <QClipboard>
#include <QColorDialog>
#include <QComboBox>
#include <QFontComboBox>
#include <QFile>
#include <QFileDialog>
#include <QFileInfo>
#include <QFontDatabase>
#include <QMenu>
#include <QMenuBar>
#include <QTextEdit>
#include <QStatusBar>
#include <QToolBar>
#include <QTextCursor>
#include <QTextDocumentWriter>
#include <QTextList>
#include <QtDebug>
#include <QCloseEvent>
#include <QMessageBox>
#include <QMimeData>
#include <QMimeDatabase>
#if defined(QT_PRINTSUPPORT_LIB)
#include <QtPrintSupport/qtprintsupportglobal.h>
#if QT_CONFIG(printer)
#if QT_CONFIG(printdialog)
#include <QPrintDialog>
#endif
#include <QPrinter>
#if QT_CONFIG(printpreviewdialog)
#include <QPrintPreviewDialog>
#endif
#endif
#endif
#include "textedit.h"
#ifdef Q_OS_MAC
const QString rsrcPath = ":/images/mac";
#else
const QString rsrcPath = ":/images/win";
#endif
TextEdit::TextEdit(QWidget *parent)
: QMainWindow(parent)
{
#ifdef Q_OS_MACOS
setUnifiedTitleAndToolBarOnMac(true);
#endif
setWindowTitle(QCoreApplication::applicationName());
textEdit = new QTextEdit(this);
connect(textEdit, &QTextEdit::currentCharFormatChanged,
this, &TextEdit::currentCharFormatChanged);
connect(textEdit, &QTextEdit::cursorPositionChanged,
this, &TextEdit::cursorPositionChanged);
setCentralWidget(textEdit);
setToolButtonStyle(Qt::ToolButtonFollowStyle);
setupFileActions();
setupEditActions();
setupTextActions();
{
QMenu *helpMenu = menuBar()->addMenu(tr("Help"));
helpMenu->addAction(tr("About"), this, &TextEdit::about);
helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
}
QFont textFont("Helvetica");
textFont.setStyleHint(QFont::SansSerif);
textEdit->setFont(textFont);
fontChanged(textEdit->font());
colorChanged(textEdit->textColor());
alignmentChanged(textEdit->alignment());
connect(textEdit->document(), &QTextDocument::modificationChanged,
actionSave, &QAction::setEnabled);
connect(textEdit->document(), &QTextDocument::modificationChanged,
this, &QWidget::setWindowModified);
connect(textEdit->document(), &QTextDocument::undoAvailable,
actionUndo, &QAction::setEnabled);
connect(textEdit->document(), &QTextDocument::redoAvailable,
actionRedo, &QAction::setEnabled);
setWindowModified(textEdit->document()->isModified());
actionSave->setEnabled(textEdit->document()->isModified());
actionUndo->setEnabled(textEdit->document()->isUndoAvailable());
actionRedo->setEnabled(textEdit->document()->isRedoAvailable());
#ifndef QT_NO_CLIPBOARD
actionCut->setEnabled(false);
connect(textEdit, &QTextEdit::copyAvailable, actionCut, &QAction::setEnabled);
actionCopy->setEnabled(false);
connect(textEdit, &QTextEdit::copyAvailable, actionCopy, &QAction::setEnabled);
connect(QApplication::clipboard(), &QClipboard::dataChanged, this, &TextEdit::clipboardDataChanged);
#endif
textEdit->setFocus();
setCurrentFileName(QString());
#ifdef Q_OS_MACOS
// Use dark text on light background on macOS, also in dark mode.
QPalette pal = textEdit->palette();
pal.setColor(QPalette::Base, QColor(Qt::white));
pal.setColor(QPalette::Text, QColor(Qt::black));
textEdit->setPalette(pal);
#endif
}
void TextEdit::closeEvent(QCloseEvent *e)
{
if (maybeSave())
e->accept();
else
e->ignore();
}
void TextEdit::setupFileActions()
{
QToolBar *tb = addToolBar(tr("File Actions"));
QMenu *menu = menuBar()->addMenu(tr("&File"));
const QIcon newIcon = QIcon::fromTheme("document-new", QIcon(rsrcPath + "/filenew.png"));
QAction *a = menu->addAction(newIcon, tr("&New"), this, &TextEdit::fileNew);
tb->addAction(a);
a->setPriority(QAction::LowPriority);
a->setShortcut(QKeySequence::New);
const QIcon openIcon = QIcon::fromTheme("document-open", QIcon(rsrcPath + "/fileopen.png"));
a = menu->addAction(openIcon, tr("&Open..."), this, &TextEdit::fileOpen);
a->setShortcut(QKeySequence::Open);
tb->addAction(a);
menu->addSeparator();
const QIcon saveIcon = QIcon::fromTheme("document-save", QIcon(rsrcPath + "/filesave.png"));
actionSave = menu->addAction(saveIcon, tr("&Save"), this, &TextEdit::fileSave);
actionSave->setShortcut(QKeySequence::Save);
actionSave->setEnabled(false);
tb->addAction(actionSave);
a = menu->addAction(tr("Save &As..."), this, &TextEdit::fileSaveAs);
a->setPriority(QAction::LowPriority);
menu->addSeparator();
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
const QIcon printIcon = QIcon::fromTheme("document-print", QIcon(rsrcPath + "/fileprint.png"));
a = menu->addAction(printIcon, tr("&Print..."), this, &TextEdit::filePrint);
a->setPriority(QAction::LowPriority);
a->setShortcut(QKeySequence::Print);
tb->addAction(a);
const QIcon filePrintIcon = QIcon::fromTheme("fileprint", QIcon(rsrcPath + "/fileprint.png"));
menu->addAction(filePrintIcon, tr("Print Preview..."), this, &TextEdit::filePrintPreview);
const QIcon exportPdfIcon = QIcon::fromTheme("exportpdf", QIcon(rsrcPath + "/exportpdf.png"));
a = menu->addAction(exportPdfIcon, tr("&Export PDF..."), this, &TextEdit::filePrintPdf);
a->setPriority(QAction::LowPriority);
a->setShortcut(Qt::CTRL | Qt::Key_D);
tb->addAction(a);
menu->addSeparator();
#endif
a = menu->addAction(tr("&Quit"), this, &QWidget::close);
a->setShortcut(Qt::CTRL | Qt::Key_Q);
}
void TextEdit::setupEditActions()
{
QToolBar *tb = addToolBar(tr("Edit Actions"));
QMenu *menu = menuBar()->addMenu(tr("&Edit"));
const QIcon undoIcon = QIcon::fromTheme("edit-undo", QIcon(rsrcPath + "/editundo.png"));
actionUndo = menu->addAction(undoIcon, tr("&Undo"), textEdit, &QTextEdit::undo);
actionUndo->setShortcut(QKeySequence::Undo);
tb->addAction(actionUndo);
const QIcon redoIcon = QIcon::fromTheme("edit-redo", QIcon(rsrcPath + "/editredo.png"));
actionRedo = menu->addAction(redoIcon, tr("&Redo"), textEdit, &QTextEdit::redo);
actionRedo->setPriority(QAction::LowPriority);
actionRedo->setShortcut(QKeySequence::Redo);
tb->addAction(actionRedo);
menu->addSeparator();
#ifndef QT_NO_CLIPBOARD
const QIcon cutIcon = QIcon::fromTheme("edit-cut", QIcon(rsrcPath + "/editcut.png"));
actionCut = menu->addAction(cutIcon, tr("Cu&t"), textEdit, &QTextEdit::cut);
actionCut->setPriority(QAction::LowPriority);
actionCut->setShortcut(QKeySequence::Cut);
tb->addAction(actionCut);
const QIcon copyIcon = QIcon::fromTheme("edit-copy", QIcon(rsrcPath + "/editcopy.png"));
actionCopy = menu->addAction(copyIcon, tr("&Copy"), textEdit, &QTextEdit::copy);
actionCopy->setPriority(QAction::LowPriority);
actionCopy->setShortcut(QKeySequence::Copy);
tb->addAction(actionCopy);
const QIcon pasteIcon = QIcon::fromTheme("edit-paste", QIcon(rsrcPath + "/editpaste.png"));
actionPaste = menu->addAction(pasteIcon, tr("&Paste"), textEdit, &QTextEdit::paste);
actionPaste->setPriority(QAction::LowPriority);
actionPaste->setShortcut(QKeySequence::Paste);
tb->addAction(actionPaste);
if (const QMimeData *md = QApplication::clipboard()->mimeData())
actionPaste->setEnabled(md->hasText());
#endif
}
void TextEdit::setupTextActions()
{
QToolBar *tb = addToolBar(tr("Format Actions"));
QMenu *menu = menuBar()->addMenu(tr("F&ormat"));
const QIcon boldIcon = QIcon::fromTheme("format-text-bold", QIcon(rsrcPath + "/textbold.png"));
actionTextBold = menu->addAction(boldIcon, tr("&Bold"), this, &TextEdit::textBold);
actionTextBold->setShortcut(Qt::CTRL | Qt::Key_B);
actionTextBold->setPriority(QAction::LowPriority);
QFont bold;
bold.setBold(true);
actionTextBold->setFont(bold);
tb->addAction(actionTextBold);
actionTextBold->setCheckable(true);
const QIcon italicIcon = QIcon::fromTheme("format-text-italic", QIcon(rsrcPath + "/textitalic.png"));
actionTextItalic = menu->addAction(italicIcon, tr("&Italic"), this, &TextEdit::textItalic);
actionTextItalic->setPriority(QAction::LowPriority);
actionTextItalic->setShortcut(Qt::CTRL | Qt::Key_I);
QFont italic;
italic.setItalic(true);
actionTextItalic->setFont(italic);
tb->addAction(actionTextItalic);
actionTextItalic->setCheckable(true);
const QIcon underlineIcon = QIcon::fromTheme("format-text-underline", QIcon(rsrcPath + "/textunder.png"));
actionTextUnderline = menu->addAction(underlineIcon, tr("&Underline"), this, &TextEdit::textUnderline);
actionTextUnderline->setShortcut(Qt::CTRL | Qt::Key_U);
actionTextUnderline->setPriority(QAction::LowPriority);
QFont underline;
underline.setUnderline(true);
actionTextUnderline->setFont(underline);
tb->addAction(actionTextUnderline);
actionTextUnderline->setCheckable(true);
menu->addSeparator();
const QIcon leftIcon = QIcon::fromTheme("format-justify-left", QIcon(rsrcPath + "/textleft.png"));
actionAlignLeft = new QAction(leftIcon, tr("&Left"), this);
actionAlignLeft->setShortcut(Qt::CTRL | Qt::Key_L);
actionAlignLeft->setCheckable(true);
actionAlignLeft->setPriority(QAction::LowPriority);
const QIcon centerIcon = QIcon::fromTheme("format-justify-center", QIcon(rsrcPath + "/textcenter.png"));
actionAlignCenter = new QAction(centerIcon, tr("C&enter"), this);
actionAlignCenter->setShortcut(Qt::CTRL | Qt::Key_E);
actionAlignCenter->setCheckable(true);
actionAlignCenter->setPriority(QAction::LowPriority);
const QIcon rightIcon = QIcon::fromTheme("format-justify-right", QIcon(rsrcPath + "/textright.png"));
actionAlignRight = new QAction(rightIcon, tr("&Right"), this);
actionAlignRight->setShortcut(Qt::CTRL | Qt::Key_R);
actionAlignRight->setCheckable(true);
actionAlignRight->setPriority(QAction::LowPriority);
const QIcon fillIcon = QIcon::fromTheme("format-justify-fill", QIcon(rsrcPath + "/textjustify.png"));
actionAlignJustify = new QAction(fillIcon, tr("&Justify"), this);
actionAlignJustify->setShortcut(Qt::CTRL | Qt::Key_J);
actionAlignJustify->setCheckable(true);
actionAlignJustify->setPriority(QAction::LowPriority);
const QIcon indentMoreIcon = QIcon::fromTheme("format-indent-more", QIcon(rsrcPath + "/format-indent-more.png"));
actionIndentMore = menu->addAction(indentMoreIcon, tr("&Indent"), this, &TextEdit::indent);
actionIndentMore->setShortcut(Qt::CTRL | Qt::Key_BracketRight);
actionIndentMore->setPriority(QAction::LowPriority);
const QIcon indentLessIcon = QIcon::fromTheme("format-indent-less", QIcon(rsrcPath + "/format-indent-less.png"));
actionIndentLess = menu->addAction(indentLessIcon, tr("&Unindent"), this, &TextEdit::unindent);
actionIndentLess->setShortcut(Qt::CTRL | Qt::Key_BracketLeft);
actionIndentLess->setPriority(QAction::LowPriority);
// Make sure the alignLeft is always left of the alignRight
QActionGroup *alignGroup = new QActionGroup(this);
connect(alignGroup, &QActionGroup::triggered, this, &TextEdit::textAlign);
if (QApplication::isLeftToRight()) {
alignGroup->addAction(actionAlignLeft);
alignGroup->addAction(actionAlignCenter);
alignGroup->addAction(actionAlignRight);
} else {
alignGroup->addAction(actionAlignRight);
alignGroup->addAction(actionAlignCenter);
alignGroup->addAction(actionAlignLeft);
}
alignGroup->addAction(actionAlignJustify);
tb->addActions(alignGroup->actions());
menu->addActions(alignGroup->actions());
tb->addAction(actionIndentMore);
tb->addAction(actionIndentLess);
menu->addAction(actionIndentMore);
menu->addAction(actionIndentLess);
menu->addSeparator();
QPixmap pix(16, 16);
pix.fill(Qt::black);
actionTextColor = menu->addAction(pix, tr("&Color..."), this, &TextEdit::textColor);
tb->addAction(actionTextColor);
menu->addSeparator();
const QIcon checkboxIcon = QIcon::fromTheme("status-checkbox-checked", QIcon(rsrcPath + "/checkbox-checked.png"));
actionToggleCheckState = menu->addAction(checkboxIcon, tr("Chec&ked"), this, &TextEdit::setChecked);
actionToggleCheckState->setShortcut(Qt::CTRL | Qt::Key_K);
actionToggleCheckState->setCheckable(true);
actionToggleCheckState->setPriority(QAction::LowPriority);
tb->addAction(actionToggleCheckState);
tb = addToolBar(tr("Format Actions"));
tb->setAllowedAreas(Qt::TopToolBarArea | Qt::BottomToolBarArea);
addToolBarBreak(Qt::TopToolBarArea);
addToolBar(tb);
comboStyle = new QComboBox(tb);
tb->addWidget(comboStyle);
comboStyle->addItem("Standard");
comboStyle->addItem("Bullet List (Disc)");
comboStyle->addItem("Bullet List (Circle)");
comboStyle->addItem("Bullet List (Square)");
comboStyle->addItem("Task List (Unchecked)");
comboStyle->addItem("Task List (Checked)");
comboStyle->addItem("Ordered List (Decimal)");
comboStyle->addItem("Ordered List (Alpha lower)");
comboStyle->addItem("Ordered List (Alpha upper)");
comboStyle->addItem("Ordered List (Roman lower)");
comboStyle->addItem("Ordered List (Roman upper)");
comboStyle->addItem("Heading 1");
comboStyle->addItem("Heading 2");
comboStyle->addItem("Heading 3");
comboStyle->addItem("Heading 4");
comboStyle->addItem("Heading 5");
comboStyle->addItem("Heading 6");
connect(comboStyle, &QComboBox::activated, this, &TextEdit::textStyle);
comboFont = new QFontComboBox(tb);
tb->addWidget(comboFont);
connect(comboFont, &QComboBox::textActivated, this, &TextEdit::textFamily);
comboSize = new QComboBox(tb);
comboSize->setObjectName("comboSize");
tb->addWidget(comboSize);
comboSize->setEditable(true);
const QList<int> standardSizes = QFontDatabase::standardSizes();
for (int size : standardSizes)
comboSize->addItem(QString::number(size));
comboSize->setCurrentIndex(standardSizes.indexOf(QApplication::font().pointSize()));
connect(comboSize, &QComboBox::textActivated, this, &TextEdit::textSize);
}
bool TextEdit::load(const QString &f)
{
if (!QFile::exists(f))
return false;
QFile file(f);
if (!file.open(QFile::ReadOnly))
return false;
QByteArray data = file.readAll();
QMimeDatabase db;
if (db.mimeTypeForFileNameAndData(f, data).name() == QLatin1String("text/html")) {
auto encoding = QStringDecoder::encodingForHtml(data);
QString str = QStringDecoder(encoding ? *encoding : QStringDecoder::Utf8)(data);
QUrl baseUrl = (f.front() == QLatin1Char(':') ? QUrl(f) : QUrl::fromLocalFile(f)).adjusted(QUrl::RemoveFilename);
textEdit->document()->setBaseUrl(baseUrl);
textEdit->setHtml(str);
#if QT_CONFIG(textmarkdownreader)
} else if (db.mimeTypeForFileNameAndData(f, data).name() == QLatin1String("text/markdown")) {
textEdit->setMarkdown(QString::fromUtf8(data));
#endif
} else {
textEdit->setPlainText(QString::fromUtf8(data));
}
setCurrentFileName(f);
return true;
}
bool TextEdit::maybeSave()
{
if (!textEdit->document()->isModified())
return true;
const QMessageBox::StandardButton ret =
QMessageBox::warning(this, QCoreApplication::applicationName(),
tr("The document has been modified.\n"
"Do you want to save your changes?"),
QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
if (ret == QMessageBox::Save)
return fileSave();
else if (ret == QMessageBox::Cancel)
return false;
return true;
}
void TextEdit::setCurrentFileName(const QString &fileName)
{
this->fileName = fileName;
textEdit->document()->setModified(false);
QString shownName;
if (fileName.isEmpty())
shownName = "untitled.txt";
else
shownName = QFileInfo(fileName).fileName();
setWindowTitle(tr("%1[*] - %2").arg(shownName, QCoreApplication::applicationName()));
setWindowModified(false);
}
void TextEdit::fileNew()
{
if (maybeSave()) {
textEdit->clear();
setCurrentFileName(QString());
}
}
void TextEdit::fileOpen()
{
QFileDialog fileDialog(this, tr("Open File..."));
fileDialog.setAcceptMode(QFileDialog::AcceptOpen);
fileDialog.setFileMode(QFileDialog::ExistingFile);
fileDialog.setMimeTypeFilters(QStringList()
#if QT_CONFIG(texthtmlparser)
<< "text/html"
#endif
#if QT_CONFIG(textmarkdownreader)
<< "text/markdown"
#endif
<< "text/plain");
if (fileDialog.exec() != QDialog::Accepted)
return;
const QString fn = fileDialog.selectedFiles().first();
if (load(fn))
statusBar()->showMessage(tr("Opened \"%1\"").arg(QDir::toNativeSeparators(fn)));
else
statusBar()->showMessage(tr("Could not open \"%1\"").arg(QDir::toNativeSeparators(fn)));
}
bool TextEdit::fileSave()
{
if (fileName.isEmpty())
return fileSaveAs();
if (fileName.startsWith(QStringLiteral(":/")))
return fileSaveAs();
QTextDocumentWriter writer(fileName);
bool success = writer.write(textEdit->document());
if (success) {
textEdit->document()->setModified(false);
statusBar()->showMessage(tr("Wrote \"%1\"").arg(QDir::toNativeSeparators(fileName)));
} else {
statusBar()->showMessage(tr("Could not write to file \"%1\"")
.arg(QDir::toNativeSeparators(fileName)));
}
return success;
}
bool TextEdit::fileSaveAs()
{
QFileDialog fileDialog(this, tr("Save as..."));
fileDialog.setAcceptMode(QFileDialog::AcceptSave);
QStringList mimeTypes;
mimeTypes << "text/plain"
#if QT_CONFIG(textodfwriter)
<< "application/vnd.oasis.opendocument.text"
#endif
#if QT_CONFIG(textmarkdownwriter)
<< "text/markdown"
#endif
<< "text/html";
fileDialog.setMimeTypeFilters(mimeTypes);
#if QT_CONFIG(textodfwriter)
fileDialog.setDefaultSuffix("odt");
#endif
if (fileDialog.exec() != QDialog::Accepted)
return false;
const QString fn = fileDialog.selectedFiles().first();
setCurrentFileName(fn);
return fileSave();
}
void TextEdit::filePrint()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog)
QPrinter printer(QPrinter::HighResolution);
QPrintDialog *dlg = new QPrintDialog(&printer, this);
if (textEdit->textCursor().hasSelection())
dlg->setOption(QAbstractPrintDialog::PrintSelection);
dlg->setWindowTitle(tr("Print Document"));
if (dlg->exec() == QDialog::Accepted)
textEdit->print(&printer);
delete dlg;
#endif
}
void TextEdit::filePrintPreview()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printpreviewdialog)
QPrinter printer(QPrinter::HighResolution);
QPrintPreviewDialog preview(&printer, this);
connect(&preview, &QPrintPreviewDialog::paintRequested, this, &TextEdit::printPreview);
preview.exec();
#endif
}
void TextEdit::printPreview(QPrinter *printer)
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
textEdit->print(printer);
#else
Q_UNUSED(printer);
#endif
}
void TextEdit::filePrintPdf()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
//! [0]
QFileDialog fileDialog(this, tr("Export PDF"));
fileDialog.setAcceptMode(QFileDialog::AcceptSave);
fileDialog.setMimeTypeFilters(QStringList("application/pdf"));
fileDialog.setDefaultSuffix("pdf");
if (fileDialog.exec() != QDialog::Accepted)
return;
QString fileName = fileDialog.selectedFiles().first();
QPrinter printer(QPrinter::HighResolution);
printer.setOutputFormat(QPrinter::PdfFormat);
printer.setOutputFileName(fileName);
textEdit->document()->print(&printer);
statusBar()->showMessage(tr("Exported \"%1\"")
.arg(QDir::toNativeSeparators(fileName)));
//! [0]
#endif
}
void TextEdit::textBold()
{
QTextCharFormat fmt;
fmt.setFontWeight(actionTextBold->isChecked() ? QFont::Bold : QFont::Normal);
mergeFormatOnWordOrSelection(fmt);
}
void TextEdit::textUnderline()
{
QTextCharFormat fmt;
fmt.setFontUnderline(actionTextUnderline->isChecked());
mergeFormatOnWordOrSelection(fmt);
}
void TextEdit::textItalic()
{
QTextCharFormat fmt;
fmt.setFontItalic(actionTextItalic->isChecked());
mergeFormatOnWordOrSelection(fmt);
}
void TextEdit::textFamily(const QString &f)
{
QTextCharFormat fmt;
fmt.setFontFamily(f);
mergeFormatOnWordOrSelection(fmt);
}
void TextEdit::textSize(const QString &p)
{
qreal pointSize = p.toFloat();
if (p.toFloat() > 0) {
QTextCharFormat fmt;
fmt.setFontPointSize(pointSize);
mergeFormatOnWordOrSelection(fmt);
}
}
void TextEdit::textStyle(int styleIndex)
{
QTextCursor cursor = textEdit->textCursor();
QTextListFormat::Style style = QTextListFormat::ListStyleUndefined;
QTextBlockFormat::MarkerType marker = QTextBlockFormat::MarkerType::NoMarker;
switch (styleIndex) {
case 1:
style = QTextListFormat::ListDisc;
break;
case 2:
style = QTextListFormat::ListCircle;
break;
case 3:
style = QTextListFormat::ListSquare;
break;
case 4:
if (cursor.currentList())
style = cursor.currentList()->format().style();
else
style = QTextListFormat::ListDisc;
marker = QTextBlockFormat::MarkerType::Unchecked;
break;
case 5:
if (cursor.currentList())
style = cursor.currentList()->format().style();
else
style = QTextListFormat::ListDisc;
marker = QTextBlockFormat::MarkerType::Checked;
break;
case 6:
style = QTextListFormat::ListDecimal;
break;
case 7:
style = QTextListFormat::ListLowerAlpha;
break;
case 8:
style = QTextListFormat::ListUpperAlpha;
break;
case 9:
style = QTextListFormat::ListLowerRoman;
break;
case 10:
style = QTextListFormat::ListUpperRoman;
break;
default:
break;
}
cursor.beginEditBlock();
QTextBlockFormat blockFmt = cursor.blockFormat();
if (style == QTextListFormat::ListStyleUndefined) {
blockFmt.setObjectIndex(-1);
int headingLevel = styleIndex >= 11 ? styleIndex - 11 + 1 : 0; // H1 to H6, or Standard
blockFmt.setHeadingLevel(headingLevel);
cursor.setBlockFormat(blockFmt);
int sizeAdjustment = headingLevel ? 4 - headingLevel : 0; // H1 to H6: +3 to -2
QTextCharFormat fmt;
fmt.setFontWeight(headingLevel ? QFont::Bold : QFont::Normal);
fmt.setProperty(QTextFormat::FontSizeAdjustment, sizeAdjustment);
cursor.select(QTextCursor::LineUnderCursor);
cursor.mergeCharFormat(fmt);
textEdit->mergeCurrentCharFormat(fmt);
} else {
blockFmt.setMarker(marker);
cursor.setBlockFormat(blockFmt);
QTextListFormat listFmt;
if (cursor.currentList()) {
listFmt = cursor.currentList()->format();
} else {
listFmt.setIndent(blockFmt.indent() + 1);
blockFmt.setIndent(0);
cursor.setBlockFormat(blockFmt);
}
listFmt.setStyle(style);
cursor.createList(listFmt);
}
cursor.endEditBlock();
}
void TextEdit::textColor()
{
QColor col = QColorDialog::getColor(textEdit->textColor(), this);
if (!col.isValid())
return;
QTextCharFormat fmt;
fmt.setForeground(col);
mergeFormatOnWordOrSelection(fmt);
colorChanged(col);
}
void TextEdit::textAlign(QAction *a)
{
if (a == actionAlignLeft)
textEdit->setAlignment(Qt::AlignLeft | Qt::AlignAbsolute);
else if (a == actionAlignCenter)
textEdit->setAlignment(Qt::AlignHCenter);
else if (a == actionAlignRight)
textEdit->setAlignment(Qt::AlignRight | Qt::AlignAbsolute);
else if (a == actionAlignJustify)
textEdit->setAlignment(Qt::AlignJustify);
}
void TextEdit::setChecked(bool checked)
{
textStyle(checked ? 5 : 4);
}
void TextEdit::indent()
{
modifyIndentation(1);
}
void TextEdit::unindent()
{
modifyIndentation(-1);
}
void TextEdit::modifyIndentation(int amount)
{
QTextCursor cursor = textEdit->textCursor();
cursor.beginEditBlock();
if (cursor.currentList()) {
QTextListFormat listFmt = cursor.currentList()->format();
// See whether the line above is the list we want to move this item into,
// or whether we need a new list.
QTextCursor above(cursor);
above.movePosition(QTextCursor::Up);
if (above.currentList() && listFmt.indent() + amount == above.currentList()->format().indent()) {
above.currentList()->add(cursor.block());
} else {
listFmt.setIndent(listFmt.indent() + amount);
cursor.createList(listFmt);
}
} else {
QTextBlockFormat blockFmt = cursor.blockFormat();
blockFmt.setIndent(blockFmt.indent() + amount);
cursor.setBlockFormat(blockFmt);
}
cursor.endEditBlock();
}
void TextEdit::currentCharFormatChanged(const QTextCharFormat &format)
{
fontChanged(format.font());
colorChanged(format.foreground().color());
}
void TextEdit::cursorPositionChanged()
{
alignmentChanged(textEdit->alignment());
QTextList *list = textEdit->textCursor().currentList();
if (list) {
switch (list->format().style()) {
case QTextListFormat::ListDisc:
comboStyle->setCurrentIndex(1);
break;
case QTextListFormat::ListCircle:
comboStyle->setCurrentIndex(2);
break;
case QTextListFormat::ListSquare:
comboStyle->setCurrentIndex(3);
break;
case QTextListFormat::ListDecimal:
comboStyle->setCurrentIndex(6);
break;
case QTextListFormat::ListLowerAlpha:
comboStyle->setCurrentIndex(7);
break;
case QTextListFormat::ListUpperAlpha:
comboStyle->setCurrentIndex(8);
break;
case QTextListFormat::ListLowerRoman:
comboStyle->setCurrentIndex(9);
break;
case QTextListFormat::ListUpperRoman:
comboStyle->setCurrentIndex(10);
break;
default:
comboStyle->setCurrentIndex(-1);
break;
}
switch (textEdit->textCursor().block().blockFormat().marker()) {
case QTextBlockFormat::MarkerType::NoMarker:
actionToggleCheckState->setChecked(false);
break;
case QTextBlockFormat::MarkerType::Unchecked:
comboStyle->setCurrentIndex(4);
actionToggleCheckState->setChecked(false);
break;
case QTextBlockFormat::MarkerType::Checked:
comboStyle->setCurrentIndex(5);
actionToggleCheckState->setChecked(true);
break;
}
} else {
int headingLevel = textEdit->textCursor().blockFormat().headingLevel();
comboStyle->setCurrentIndex(headingLevel ? headingLevel + 10 : 0);
}
}
void TextEdit::clipboardDataChanged()
{
#ifndef QT_NO_CLIPBOARD
if (const QMimeData *md = QApplication::clipboard()->mimeData())
actionPaste->setEnabled(md->hasText());
#endif
}
void TextEdit::about()
{
QMessageBox::about(this, tr("About"), tr("This example demonstrates Qt's "
"rich text editing facilities in action, providing an example "
"document for you to experiment with."));
}
void TextEdit::mergeFormatOnWordOrSelection(const QTextCharFormat &format)
{
QTextCursor cursor = textEdit->textCursor();
if (!cursor.hasSelection())
cursor.select(QTextCursor::WordUnderCursor);
cursor.mergeCharFormat(format);
textEdit->mergeCurrentCharFormat(format);
}
void TextEdit::fontChanged(const QFont &f)
{
comboFont->setCurrentIndex(comboFont->findText(QFontInfo(f).family()));
comboSize->setCurrentIndex(comboSize->findText(QString::number(f.pointSize())));
actionTextBold->setChecked(f.bold());
actionTextItalic->setChecked(f.italic());
actionTextUnderline->setChecked(f.underline());
}
void TextEdit::colorChanged(const QColor &c)
{
QPixmap pix(16, 16);
pix.fill(c);
actionTextColor->setIcon(pix);
}
void TextEdit::alignmentChanged(Qt::Alignment a)
{
if (a & Qt::AlignLeft)
actionAlignLeft->setChecked(true);
else if (a & Qt::AlignHCenter)
actionAlignCenter->setChecked(true);
else if (a & Qt::AlignRight)
actionAlignRight->setChecked(true);
else if (a & Qt::AlignJustify)
actionAlignJustify->setChecked(true);
}
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