Show UI warning for invalid URLs

src/gui/URLEdit.h

@@ -0,0 +1,43 @@
+/*
+ *  Copyright (C) 2014 Felix Geyer <debfx@fobos.de>
+ *  Copyright (C) 2019 KeePassXC Team <team@keepassxc.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 or (at your option)
+ *  version 3 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef KEEPASSX_URLEDIT_H
+#define KEEPASSX_URLEDIT_H
+
+#include <QAction>
+#include <QLineEdit>
+#include <QPointer>
+
+class URLEdit : public QLineEdit
+{
+    Q_OBJECT
+
+public:
+    static const QColor ErrorColor;
+
+    explicit URLEdit(QWidget* parent = nullptr);
+    void enableVerifyMode();
+
+private slots:
+    void updateStylesheet();
+
+private:
+    QPointer<QAction> m_errorAction;
+};
+
+#endif // KEEPASSX_URLEDIT_H