【QT】使用页面编辑的方式，创建记事本功能

 1 void Filewin::on_actionopen_triggered()
 2 {
 3     QString fitler=QString("Text from(*.cpp *.h)");
 4     filename=QFileDialog::getOpenFileName(this,"choose file","./",fitler);
 5     ui->statusBar->showMessage(filename);
 6 
 7     QFile file(filename);
 8     file.open(QIODevice::ReadOnly);
 9     QString str=file.readAll();
10     ui->textEdit->setText(str);
11     file.close();
12 }

1 void Filewin::on_actionsave_triggered()
2 {
3     QFile file(filename);
4     file.open(QIODevice::WriteOnly);
5     QString msg=ui->textEdit->toPlainText();
6     file.write(msg.toUtf8());
7     file.close();
8 }

1 void Filewin::on_actionssave_triggered()
2 {
3     QString filepath=QFileDialog::getSaveFileName(this,"save as","./","Text (*.c *.cpp)");
4     QFile file(filepath);
5     file.open(QIODevice::WriteOnly);
6     QString msg=ui->textEdit->toPlainText();
7     file.write(msg.toUtf8());
8     file.close();
9 }

1 void Filewin::on_actionfont_triggered()
2 {
3     bool ok;
4     QFont font=QFontDialog::getFont(&ok,this);
5     if(ok)
6     {
7         this->ui->textEdit->setFont(font);
8     }
9 }

1 void Filewin::on_actionquit_triggered()
2 {
3     this->close();
4 }