SimpleNotepad/mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QFileDialog>
#include <QTextStream>
#include <QMessageBox>
#include <QFontDialog>
#include <QFont>
#include <QColorDialog>
#include <QColor>
#include <QPrinter>
#include <QPrintDialog>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->setCentralWidget(ui->textEdit);
}

MainWindow::~MainWindow()
{
    delete ui;
}


void MainWindow::on_actionNew_triggered()
{
    file_path = "";
    ui->textEdit->setText("");
}

void MainWindow::on_actionOpen_triggered()
{
    QString filter = "All Files (*.*) ;; Text File (*.txt)";
    QString file_name = QFileDialog::getOpenFileName(this, "Open the file", QDir::homePath(), filter);
    QFile file(file_name);
    file_path = file_name;

    if (!file.open(QFile::ReadOnly | QFile::Text))
    {
        QMessageBox::warning(this, "Warning", "File not opened");
        return;
    }

    QTextStream in(&file);
    QString text = in.readAll();
    ui->textEdit->setText(text);
    file.close();
}


void MainWindow::on_actionClose_triggered()
{
    close();
}


void MainWindow::on_actionSave_triggered()
{
    QFile file(file_path);

    if (!file.open(QFile::WriteOnly | QFile::Text))
    {
        QMessageBox::warning(this, "Warning", "File not opened");
        return;
    }

    QTextStream out(&file);
    QString text = ui->textEdit->toPlainText();
    out << text;
    file.flush();
    file.close();
}


void MainWindow::on_actionSave_as_triggered()
{
    QString filter = "All Files (*.*) ;; Text File (*.txt)";
    QString file_name = QFileDialog::getSaveFileName(this, "Open the file", QDir::homePath(), filter);
    QFile file(file_name);
    file_path = file_name;

    if (!file.open(QFile::WriteOnly | QFile::Text))
    {
        QMessageBox::warning(this, "Warning", "File not opened");
        return;
    }

    QTextStream out(&file);
    QString text = ui->textEdit->toPlainText();
    out << text;
    file.flush();
    file.close();
}


void MainWindow::on_actionCut_triggered()
{
    ui->textEdit->cut();
}


void MainWindow::on_actionCopy_triggered()
{
    ui->textEdit->copy();
}


void MainWindow::on_actionPaste_triggered()
{
    ui->textEdit->paste();
}


void MainWindow::on_actionUndo_triggered()
{
    ui->textEdit->undo();
}


void MainWindow::on_actionRedo_triggered()
{
    ui->textEdit->redo();
}

void MainWindow::on_actionAbout_QT_triggered()
{
    QMessageBox::aboutQt(this, "About QT");
}


void MainWindow::on_actionAbout_triggered()
{
    QString about_text = "Auther:\tStranger\n";
    about_text += "Program:\tNotepad\n";
    about_text += "Created:\t23.11.22\n";
    about_text += "Notabug:\tStranger135216341";

    QMessageBox::about(this, "About Notepad", about_text);
}



void MainWindow::on_actionFont_triggered()
{
    bool ok;
    QFont font = QFontDialog::getFont(&ok, this);

    if (ok)
    {
        ui->textEdit->setFont(font);
    } else return;
}


void MainWindow::on_actionColor_triggered()
{
    QColor color = QColorDialog::getColor(Qt::white, this, "Choose color");
    if (color.isValid())
    {
        ui->textEdit->setTextColor(color);
    }
}


void MainWindow::on_actionBackground_triggered()
{
    QColor color = QColorDialog::getColor(Qt::white, this, "Choose color");
    if (color.isValid())
    {
        ui->textEdit->setTextBackgroundColor(color);
    }
}


void MainWindow::on_actionBackground_Color_Edit_triggered()
{
    QColor color = QColorDialog::getColor(Qt::white, this, "Choose color");
    if (color.isValid())
    {
        ui->textEdit->setPalette(color);
    }
}


void MainWindow::on_actionPrint_triggered()
{
    QPrinter printer;
    printer.setPrinterName("desier printer name");
    QPrintDialog dialog(&printer, this);
    if (dialog.exec() == QDialog::Rejected) return;
    ui->textEdit->print(&printer);
}