📄 7.14 实例：html预览编辑程序.txt
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void MainWindow::open()
{
QString fileName = QFileDialog::getOpenFileName(this);
if (!fileName.isEmpty()) {
/*从一个文件中读*/
QFile file(fileName);
if (!file.open(QIODevice::ReadOnly)) {
QMessageBox::information(this, tr("Unable to open file"),
file.errorString());
return;
}
QTextStream out(&file);
QString output = out.readAll();
/*显示内容*/
centralWidget->plainTextEdit->setPlainText(output);
}
}
void MainWindow::openUrl()
{
bool ok;
QString url = QInputDialog::getText(this, tr("Enter a URL"),
tr("URL:"), QLineEdit::Normal, "http://", &ok);
if (ok && !url.isEmpty()) {
centralWidget->webView->setUrl(url);
}
}
void MainWindow::save()
{
QString content = centralWidget->plainTextEdit->toPlainText();
QString fileName = QFileDialog::getSaveFileName(this);
if (!fileName.isEmpty()) {
QFile file(fileName);
if (!file.open(QIODevice::WriteOnly)) {
QMessageBox::information(this, tr("Unable to open file"),
file.errorString());
return;
}
QTextStream in(&file);
in << content;
}
}
void MainWindow::updateTextEdit()
{
QWebFrame *mainFrame = centralWidget->webView->page()->mainFrame();
QString frameText = mainFrame->toHtml();
centralWidget->plainTextEdit->setPlainText(frameText);
}
void MainWindow::setStartupText()
{
QString string = "<html><body><h1>HTML Previewer</h1>"
" <p>This example shows you how to use QWebView to"
" preview HTML data written in a QPlainTextEdit.</p>"
" </body></html>";
centralWidget->webView->setHtml(string);
}
int main(int argc, char * argv[])
{
QApplication app(argc, argv);
MainWindow *mainWindow = new MainWindow;
mainWindow->show();
return app.exec();
}⌨️ 快捷键说明
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