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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include <QtWidgets>
MainWindow::MainWindow()
{
QMenu *fileMenu = new QMenu(tr("&File"));
fileMenu->addAction(tr("&Open..."), QKeySequence(tr("Ctrl+O", "File|Open")),
this, &MainWindow::openFile);
QAction *quitAction = fileMenu->addAction(tr("E&xit"), this, &MainWindow::close);
quitAction->setShortcut(tr("Ctrl+Q"));
QMenu *editMenu = new QMenu(tr("&Edit"));
cutAction = editMenu->addAction(tr("Cu&t"), this, &MainWindow::cutSelection);
cutAction->setShortcut(tr("Ctrl+X"));
cutAction->setEnabled(false);
copyAction = editMenu->addAction(tr("&Copy"), this, &MainWindow::copySelection);
copyAction->setShortcut(tr("Ctrl+C"));
copyAction->setEnabled(false);
pasteAction = editMenu->addAction(tr("&Paste"), this, &MainWindow::pasteSelection);
pasteAction->setShortcut(tr("Ctrl+V"));
pasteAction->setEnabled(false);
QMenu *selectMenu = new QMenu(tr("&Select"));
selectMenu->addAction(tr("&Word"), this, &MainWindow::selectWord);
selectMenu->addAction(tr("&Line"), this, &MainWindow::selectLine);
selectMenu->addAction(tr("&Block"), this, &MainWindow::selectBlock);
selectMenu->addAction(tr("&Frame"), this, &MainWindow::selectFrame);
menuBar()->addMenu(fileMenu);
menuBar()->addMenu(editMenu);
menuBar()->addMenu(selectMenu);
editor = new QTextEdit(this);
document = new QTextDocument(this);
editor->setDocument(document);
connect(editor, &QTextEdit::selectionChanged,
this, &MainWindow::updateMenus);
setCentralWidget(editor);
setWindowTitle(tr("Text Document Writer"));
}
void MainWindow::openFile()
{
QString fileName = QFileDialog::getOpenFileName(this,
tr("Open file"), currentFile, "HTML files (*.html);;Text files (*.txt)");
if (!fileName.isEmpty()) {
QFileInfo info(fileName);
if (info.completeSuffix() == "html") {
QFile file(fileName);
if (file.open(QFile::ReadOnly)) {
editor->setHtml(QString(file.readAll()));
file.close();
currentFile = fileName;
}
} else if (info.completeSuffix() == "txt") {
QFile file(fileName);
if (file.open(QFile::ReadOnly)) {
editor->setPlainText(file.readAll());
file.close();
currentFile = fileName;
}
}
}
}
void MainWindow::cutSelection()
{
QTextCursor cursor = editor->textCursor();
if (cursor.hasSelection()) {
selection = cursor.selection();
cursor.removeSelectedText();
}
}
void MainWindow::copySelection()
{
QTextCursor cursor = editor->textCursor();
if (cursor.hasSelection()) {
selection = cursor.selection();
cursor.clearSelection();
}
}
void MainWindow::pasteSelection()
{
QTextCursor cursor = editor->textCursor();
cursor.insertFragment(selection);
}
void MainWindow::selectWord()
{
QTextCursor cursor = editor->textCursor();
//! [0]
cursor.beginEditBlock();
//! [1]
cursor.movePosition(QTextCursor::StartOfWord);
cursor.movePosition(QTextCursor::EndOfWord, QTextCursor::KeepAnchor);
//! [1]
cursor.endEditBlock();
//! [0]
editor->setTextCursor(cursor);
}
void MainWindow::selectLine()
{
QTextCursor cursor = editor->textCursor();
cursor.beginEditBlock();
cursor.movePosition(QTextCursor::StartOfLine);
cursor.movePosition(QTextCursor::EndOfLine, QTextCursor::KeepAnchor);
cursor.endEditBlock();
editor->setTextCursor(cursor);
}
void MainWindow::selectBlock()
{
QTextCursor cursor = editor->textCursor();
cursor.beginEditBlock();
cursor.movePosition(QTextCursor::StartOfBlock);
cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
cursor.endEditBlock();
editor->setTextCursor(cursor);
}
void MainWindow::selectFrame()
{
QTextCursor cursor = editor->textCursor();
QTextFrame *frame = cursor.currentFrame();
cursor.beginEditBlock();
cursor.setPosition(frame->firstPosition());
cursor.setPosition(frame->lastPosition(), QTextCursor::KeepAnchor);
cursor.endEditBlock();
editor->setTextCursor(cursor);
}
void MainWindow::updateMenus()
{
QTextCursor cursor = editor->textCursor();
cutAction->setEnabled(cursor.hasSelection());
copyAction->setEnabled(cursor.hasSelection());
pasteAction->setEnabled(!selection.isEmpty());
}