我的画图项目需要读写自定义虚线样式

{...comboBox_penStyle = new QComboBox;QStringList SL_penStyle;SL_penStyle << "______" << "----------" << ".........." << "-.-.-.-.-." << "-..-..-..-.." << settings.value("DashPattern", "5,5").toString();comboBox_penStyle->addItems(SL_penStyle);ui->mainToolBar->addWidget(comboBox_penStyle);connect(comboBox_penStyle, SIGNAL(currentIndexChanged(int)), this, SLOT(comboBox_penStyle_changed(int)));...
}

void MainWindow::comboBox_penStyle_changed(int index)
{Qt::PenStyle ps = static_cast<Qt::PenStyle>(index + 1);imageWidget->pen.setStyle(ps);if (ps == Qt::CustomDashLine) {QStringList SL = comboBox_penStyle->itemText(index).split(",");QVector<qreal> pattern;for (QString s: SL)pattern << s.toInt();imageWidget->pen.setDashPattern(pattern);}
}

void MainWindow::on_action_dashPattern_triggered()
{QDialog *dialog = new QDialog(this);dialog->setWindowTitle("虚线样式");dialog->setFixedSize(200, 100);QVBoxLayout *vbox = new QVBoxLayout;QString s = settings.value("DashPattern", "5,5").toString();QLineEdit *lineEdit = new QLineEdit;lineEdit->setText(s);vbox->addWidget(lineEdit);QPushButton *pushButton_confirm = new QPushButton("确定");QPushButton *pushButton_cancel = new QPushButton("取消");QHBoxLayout *hbox = new QHBoxLayout;hbox->addStretch();hbox->addWidget(pushButton_confirm);hbox->addWidget(pushButton_cancel);hbox->addStretch();vbox->addLayout(hbox);dialog->setLayout(vbox);connect(pushButton_confirm, SIGNAL(clicked()), dialog, SLOT(accept()));connect(pushButton_cancel, SIGNAL(clicked()), dialog, SLOT(reject()));if (dialog->exec() == QDialog::Accepted) {settings.setValue("DashPattern", lineEdit->text());comboBox_penStyle->setItemText(5, lineEdit->text());QStringList SL = lineEdit->text().split(",");QVector<qreal> pattern;for (QString s: SL)pattern << s.toInt();imageWidget->pen.setDashPattern(pattern);}
}

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