mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <iostream>


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()
{
    currentFile.clear();
    ui->textEdit->setPlainText(QString());
}

void MainWindow::on_actionOpen_triggered()
{
    QString filename = QFileDialog::getOpenFileName(this, "Open File");
    QFile file(filename);
    currentFile = filename;
    if(!file.open(QIODevice::ReadOnly | QFile::Text)){
        QMessageBox::warning(this,"Warning","oop, something went wrong !");
        return;
    }

        setWindowTitle(currentFile);
        QTextStream in(&file);
        QString text = in.readAll();
        ui->textEdit->setPlainText(text);
        file.close();

}

void MainWindow::on_actionSave_as_triggered()
{
    QString filename = QFileDialog::getSaveFileName(this,"Save file as");
    QFile file(filename);
    currentFile = filename;
    if(!file.open(QFile::WriteOnly | QFile::Text)){
        QMessageBox::warning(this,"Warning","oop, something went wrong !");
        return;
    }
    setWindowTitle(currentFile);
    QTextStream out(&file);
    QString text = ui->textEdit->toPlainText();
    out<<text;
    file.close();
}


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


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


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


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


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

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

void MainWindow::on_actionSave_triggered()
{
    QFile file(currentFile);
    if(!file.open(QFile::WriteOnly | QFile::Text)){
        QMessageBox::warning(this,"Warning","oop, something went wrong !");
        return;
    }
    QTextStream out(&file);
    QString text = ui->textEdit->toPlainText();
    out<<text;
    file.close();

}


void MainWindow::on_actionDark_triggered()
{
    ui->textEdit->setStyleSheet("color:white;background-color: rgb(46, 52, 54);");
}

void MainWindow::on_actionLight_triggered()
{
    ui->textEdit->setStyleSheet("color:black;background-color:white;");
}