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** This file is part of the documentation of the Qt Toolkit.
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#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include
#include
#include
class QAction;
class QTextDocument;
class QTextEdit;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void openFile();
void printFile();
void printPdf();
private:
QAction *printAction;
QAction *pdfPrintAction;
QString currentFile;
QTextEdit *editor;
QTextDocument *document;
};
#endif
#include
#include "mainwindow.h"
MainWindow::MainWindow()
{
QMenu *fileMenu = new QMenu(tr("&File"));
fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),
QKeySequence(tr("Ctrl+O", "File|Open")));
printAction = fileMenu->addAction(tr("&Print..."), this, SLOT(printFile()));
printAction->setEnabled(false);
pdfPrintAction = fileMenu->addAction(tr("Print as P&DF..."), this, SLOT(printPdf()));
pdfPrintAction->setEnabled(false);
fileMenu->addAction(tr("E&xit"), this, SLOT(close()),
QKeySequence(tr("Ctrl+Q", "File|Exit")));
menuBar()->addMenu(fileMenu);
editor = new QTextEdit(this);
document = new QTextDocument(this);
editor->setDocument(document);
connect(editor, SIGNAL(selectionChanged()), this, SLOT(updateMenus()));
setCentralWidget(editor);
setWindowTitle(tr("Text Document Writer"));
}
void MainWindow::openFile()
{
QString fileName = QFileDialog::getOpenFileName(this,
tr("Open file"), currentFile, "HTML files (*.html);;Text files (*.txt)");
if (!fileName.isEmpty()) {
QFileInfo info(fileName);
if (info.completeSuffix() == "html") {
QFile file(fileName);
if (file.open(QIODevice::ReadOnly)) {
editor->setHtml(file.readAll());
file.close();
currentFile = fileName;
}
} else if (info.completeSuffix() == "txt") {
QFile file(fileName);
if (file.open(QIODevice::ReadOnly)) {
editor->setPlainText(file.readAll());
file.close();
currentFile = fileName;
}
}
printAction->setEnabled(true);
pdfPrintAction->setEnabled(true);
}
}
void MainWindow::printFile()
{
QTextDocument *document = editor->document();
QPrinter printer;
QPrintDialog *dlg = new QPrintDialog(&printer, this);
if (dlg->exec() != QDialog::Accepted)
return;
document->print(&printer);
}
void MainWindow::printPdf()
{
QPrinter printer(QPrinter::HighResolution);
printer.setOutputFormat(QPrinter::PdfFormat);
QPrintDialog *printDialog = new QPrintDialog(&printer, this);
if (printDialog->exec() == QDialog::Accepted)
editor->document()->print(&printer);
}
#include
#include "mainwindow.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
MainWindow *window = new MainWindow;
window->resize(640, 480);
window->show();
return app.exec();
}