Method eventFilter

pj_widgets/src/Dialog.cpp:126–159

}

bool Dialog::eventFilter(QObject* watched, QEvent* event) {
  const QEvent::Type type = event->type();
  if (type != QEvent::MouseMove && type != QEvent::MouseButtonPress) {
    return QDialog::eventFilter(watched, event);
  }
  auto* widget = qobject_cast<QWidget*>(watched);
  if (widget == nullptr || widget->window() != this) {
    return QDialog::eventFilter(watched, event);
  }
  if (isMaximized() || isFullScreen()) {
    return QDialog::eventFilter(watched, event);
  }
  auto* mouse_event = static_cast<QMouseEvent*>(event);
  const QPoint window_pos = mapFromGlobal(mouse_event->globalPosition().toPoint());
  const Qt::Edges edges = edgesAtPoint(window_pos);

  if (type == QEvent::MouseMove) {
    if (edges != 0) {
      setCursor(cursorForEdges(edges));
    } else {
      unsetCursor();
    }
    return false;
  }
  // MouseButtonPress
  if (mouse_event->button() != Qt::LeftButton || edges == 0) {
    return false;
  }
  if (auto* handle = windowHandle()) {
    handle->startSystemResize(edges);
    return true;
  }
  return false;
}

}  // namespace PJ