mainwindow.cpp Example File

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 #include "mainwindow.h"
 #include "ui_mainwindow.h"

 #include <QtCore/QUrl>
 #include <QtGui/QMouseEvent>
 #include <QtGui/QDesktopServices>

 MainWindow::MainWindow(QWidget *parent)
 :   QMainWindow(parent), ui(new Ui::MainWindow)
 {
     ui->setupUi(this);
 }

 MainWindow::~MainWindow()
 {
     delete ui;
 }

 void MainWindow::displayAnnotatedUrl(const QUrl &url, const QString &title, const QPixmap &pixmap)
 {
     ui->m_help->setHidden(true);

     ui->m_url->setText(url.toString());
     ui->m_title->setText(title);
     ui->m_image->setPixmap(pixmap);
 }

 void MainWindow::mouseReleaseEvent(QMouseEvent *event)
 {
     if (ui->centralWidget->rect().contains(event->pos()))
         QDesktopServices::openUrl(QUrl(ui->m_url->text()));
 }