EComboBox usability patch

libs/widgets/ecombobox.cpp

@@ -67,6 +67,10 @@ EComboBox::EComboBox(QWidget * parent)
 	header->setParent(iv->header());
 	connect(filter, &CLineEdit::textChanged, this, [this](const QString & text) { EComboBox::filterChanged(text, false); });
 	connect(model(), &EModel::layoutChanged, this, &EComboBox::rowsChanged);
+	connect(filter, &QLineEdit::returnPressed, this, [this]() {
+		if (rows_visible != 1) return;
+		setCurrentIndex(first_index.row());
+	});
 }
 
 
@@ -84,6 +88,7 @@ void EComboBox::showPopup() {
 	QRect r = iv->header()->rect();
 	header->setGeometry(r.x(), r.y(), r.width(), r.height() - 1);
 	filter->setFocus();
+	filter->selectAll();
 }
 
 
@@ -109,6 +114,7 @@ void EComboBox::filterChanged(const QString & text, bool first) {
 	iv->hide();
 	QModelIndex pi = iv->rootIndex();
 	int row_count  = iv->model()->rowCount();
+	rows_visible   = 0;
 	if (text.isEmpty()) {
 		for (int i = 0; i < row_count; ++i) {
 			iv->setRowHidden(i, pi, false);
@@ -124,15 +130,18 @@ void EComboBox::filterChanged(const QString & text, bool first) {
 		return;
 	}
 	for (int i = 0; i < row_count; ++i) {
-		iv->setRowHidden(i,
-		                 pi,
-		                 !iv->model()->index(i, 0, pi).data().toString().contains(
+		bool hidden = !iv->model()->index(i, 0, pi).data().toString().contains(
 #if QT_VERSION_MAJOR <= 5
-							 QRegExp(text, Qt::CaseInsensitive)
+			QRegExp(text, Qt::CaseInsensitive)
 #else
-							 QRegularExpression(text, QRegularExpression::CaseInsensitiveOption)
+			QRegularExpression(text, QRegularExpression::CaseInsensitiveOption)
 #endif
-								 ));
+		);
+		if (!hidden) {
+			if (rows_visible == 0) first_index = iv->model()->index(i, 0);
+			++rows_visible;
+		}
+		iv->setRowHidden(i, pi, hidden);
 		iv->model()->setData(iv->model()->index(i, 0), iv->model()->index(i, 0, pi).data().toString(), Qt::ToolTipRole);
 	}
 	iv->show();

libs/widgets/ecombobox.h

@@ -55,6 +55,8 @@ private:
 	QLabel * icon;
 	CLineEdit * filter;
 	QFont nfont, ifont;
+	QModelIndex first_index;
+	int rows_visible = 0;
 };
 
 #endif // ECOMBOBOX_H