【QT】使用页面编辑的方式，创建记事本功能

1，显示效果

2，页面编辑方式，画好页面之后转到槽函数

3，各个槽函数代码简单实现

3.1，打开

void Filewin::on_actionopen_triggered()
{
    QString fitler=QString("Text from(*.cpp *.h)");
    filename=QFileDialog::getOpenFileName(this,"choose file","./",fitler);
    ui->statusBar->showMessage(filename);

    QFile file(filename);
    file.open(QIODevice::ReadOnly);
    QString str=file.readAll();
    ui->textEdit->setText(str);
    file.close();
}

3.2，保存

void Filewin::on_actionsave_triggered()
{
    QFile file(filename);
    file.open(QIODevice::WriteOnly);
    QString msg=ui->textEdit->toPlainText();
    file.write(msg.toUtf8());
    file.close();
}

3.3，另存为

void Filewin::on_actionssave_triggered()
{
    QString filepath=QFileDialog::getSaveFileName(this,"save as","./","Text (*.c *.cpp)");
    QFile file(filepath);
    file.open(QIODevice::WriteOnly);
    QString msg=ui->textEdit->toPlainText();
    file.write(msg.toUtf8());
    file.close();
}

3.4，设置字体

void Filewin::on_actionfont_triggered()
{
    bool ok;
    QFont font=QFontDialog::getFont(&ok,this);
    if(ok)
    {
        this->ui->textEdit->setFont(font);
    }
}

3.5 退出

void Filewin::on_actionquit_triggered()
{
    this->close();
}