+void TopicWidget::currentChanged(const QModelIndex ¤t, const QModelIndex &previous) {
+ Q_UNUSED(previous);
+ setTopic(current.sibling(current.row(), 1).data().toString());
+}
+
+void TopicWidget::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight) {
+ QItemSelectionRange changedArea(topLeft, bottomRight);
+ QModelIndex currentTopicIndex = selectionModel()->currentIndex().sibling(selectionModel()->currentIndex().row(), 1);
+ if(changedArea.contains(currentTopicIndex))
+ setTopic(currentTopicIndex.data().toString());
+};
+
+void TopicWidget::setTopic(const QString &newtopic) {
+ if(_topic == newtopic)
+ return;
+
+ _topic = newtopic;
+ ui.topicButton->setAndStyleText(newtopic);
+ ui.topicLineEdit->setText(newtopic);
+ switchPlain();
+}
+
+void TopicWidget::on_topicLineEdit_returnPressed() {
+ emit topicChanged(ui.topicLineEdit->text());
+ switchPlain();
+}
+
+void TopicWidget::on_topicButton_clicked() {
+ switchEditable();
+}
+
+void TopicWidget::switchEditable() {
+ ui.topicButton->hide();
+ ui.topicLineEdit->show();
+ ui.topicLineEdit->setFocus();
+}
+
+void TopicWidget::switchPlain() {
+ ui.topicLineEdit->hide();
+ ui.topicButton->show();
+ ui.topicLineEdit->setText(_topic);
+}
+
+// filter for the input widget to switch back to normal mode
+bool TopicWidget::eventFilter(QObject *obj, QEvent *event) {
+ if(event->type() == QEvent::FocusOut) {
+ switchPlain();
+ return true;
+ }
+
+ if(event->type() != QEvent::KeyPress)
+ return QObject::eventFilter(obj, event);
+
+ QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
+
+ if(keyEvent->key() == Qt::Key_Escape) {
+ switchPlain();
+ return true;
+ }
+
+ return false;