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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QFile>
#include <QFileDialog>
#include <QTextStream>
#include <QMessageBox>
#if defined(QT_PRINTSUPPORT_LIB)
#include <QtPrintSupport/qtprintsupportglobal.h>
#if QT_CONFIG(printer)
#if QT_CONFIG(printdialog)
#include <QPrintDialog>
#endif // QT_CONFIG(printdialog)
#include <QPrinter>
#endif // QT_CONFIG(printer)
#endif // QT_PRINTSUPPORT_LIB
#include <QFont>
#include <QFontDialog>
#include "notepad.h"
#include "ui_notepad.h"
Notepad::Notepad(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::Notepad)
{
ui->setupUi(this);
connect(ui->actionNew, &QAction::triggered, this, &Notepad::newDocument);
connect(ui->actionOpen, &QAction::triggered, this, &Notepad::open);
connect(ui->actionSave, &QAction::triggered, this, &Notepad::save);
connect(ui->actionSave_as, &QAction::triggered, this, &Notepad::saveAs);
connect(ui->actionPrint, &QAction::triggered, this, &Notepad::print);
connect(ui->actionExit, &QAction::triggered, this, &QWidget::close);
#if QT_CONFIG(clipboard)
connect(ui->textEdit, &QTextEdit::copyAvailable, ui->actionCopy, &QAction::setEnabled);
connect(ui->actionCopy, &QAction::triggered, ui->textEdit, &QTextEdit::copy);
connect(ui->actionCut, &QAction::triggered, ui->textEdit, &QTextEdit::cut);
connect(ui->actionPaste, &QAction::triggered, ui->textEdit, &QTextEdit::paste);
#endif
connect(ui->textEdit, &QTextEdit::undoAvailable, ui->actionUndo, &QAction::setEnabled);
connect(ui->actionUndo, &QAction::triggered, ui->textEdit, &QTextEdit::undo);
connect(ui->textEdit, &QTextEdit::redoAvailable, ui->actionRedo, &QAction::setEnabled);
connect(ui->actionRedo, &QAction::triggered, ui->textEdit, &QTextEdit::redo);
connect(ui->actionFont, &QAction::triggered, this, &Notepad::selectFont);
connect(ui->actionBold, &QAction::triggered, this, &Notepad::setFontBold);
connect(ui->actionUnderline, &QAction::triggered, this, &Notepad::setFontUnderline);
connect(ui->actionItalic, &QAction::triggered, this, &Notepad::setFontItalic);
connect(ui->actionAbout, &QAction::triggered, this, &Notepad::about);
// Disable menu actions for unavailable features
#if !defined(QT_PRINTSUPPORT_LIB) || !QT_CONFIG(printer)
ui->actionPrint->setEnabled(false);
#endif
#if !QT_CONFIG(clipboard)
ui->actionCut->setEnabled(false);
ui->actionCopy->setEnabled(false);
ui->actionPaste->setEnabled(false);
#endif
}
Notepad::~Notepad()
{
delete ui;
}
void Notepad::newDocument()
{
currentFile.clear();
ui->textEdit->setText(QString());
}
void Notepad::open()
{
QString fileName = QFileDialog::getOpenFileName(this, "Open the file");
if (fileName.isEmpty())
return;
QFile file(fileName);
currentFile = fileName;
if (!file.open(QIODevice::ReadOnly | QFile::Text)) {
QMessageBox::warning(this, "Warning", "Cannot open file: " + file.errorString());
return;
}
setWindowTitle(fileName);
QTextStream in(&file);
QString text = in.readAll();
ui->textEdit->setText(text);
file.close();
}
void Notepad::save()
{
QString fileName;
// If we don't have a filename from before, get one.
if (currentFile.isEmpty()) {
fileName = QFileDialog::getSaveFileName(this, "Save");
if (fileName.isEmpty())
return;
currentFile = fileName;
} else {
fileName = currentFile;
}
QFile file(fileName);
if (!file.open(QIODevice::WriteOnly | QFile::Text)) {
QMessageBox::warning(this, "Warning", "Cannot save file: " + file.errorString());
return;
}
setWindowTitle(fileName);
QTextStream out(&file);
QString text = ui->textEdit->toPlainText();
out << text;
file.close();
}
void Notepad::saveAs()
{
QString fileName = QFileDialog::getSaveFileName(this, "Save as");
if (fileName.isEmpty())
return;
QFile file(fileName);
if (!file.open(QFile::WriteOnly | QFile::Text)) {
QMessageBox::warning(this, "Warning", "Cannot save file: " + file.errorString());
return;
}
currentFile = fileName;
setWindowTitle(fileName);
QTextStream out(&file);
QString text = ui->textEdit->toPlainText();
out << text;
file.close();
}
void Notepad::print()
{
#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
QPrinter printDev;
#if QT_CONFIG(printdialog)
QPrintDialog dialog(&printDev, this);
if (dialog.exec() == QDialog::Rejected)
return;
#endif // QT_CONFIG(printdialog)
ui->textEdit->print(&printDev);
#endif // QT_CONFIG(printer)
}
void Notepad::selectFont()
{
bool fontSelected;
QFont font = QFontDialog::getFont(&fontSelected, this);
if (fontSelected)
ui->textEdit->setFont(font);
}
void Notepad::setFontUnderline(bool underline)
{
ui->textEdit->setFontUnderline(underline);
}
void Notepad::setFontItalic(bool italic)
{
ui->textEdit->setFontItalic(italic);
}
void Notepad::setFontBold(bool bold)
{
bold ? ui->textEdit->setFontWeight(QFont::Bold) :
ui->textEdit->setFontWeight(QFont::Normal);
}
void Notepad::about()
{
QMessageBox::about(this, tr("About Notepad"),
tr("The <b>Notepad</b> example demonstrates how to code a basic "
"text editor using QtWidgets"));
}
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