1 files changed, 21 insertions, 2 deletions
diff --git a/examples/serialbus/can/sendframebox.cpp b/examples/serialbus/can/sendframebox.cpp
index a84222d..117ff10 100644
--- a/examples/serialbus/can/sendframebox.cpp
+++ b/examples/serialbus/can/sendframebox.cpp
@@ -1,12 +1,22 @@
 /****************************************************************************
 **
 ** Copyright (C) 2017 Andre Hartmann <aha_1980@gmx.de>
-** Contact: http://www.qt.io/licensing/
+** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the QtSerialBus module.
 **
 ** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
@@ -157,6 +167,15 @@ SendFrameBox::SendFrameBox(QWidget *parent) :
             m_ui->bitrateSwitchBox->setChecked(false);
     });
 
+    auto frameIdTextChanged = [this]() {
+        const bool hasFrameId = !m_ui->frameIdEdit->text().isEmpty();
+        m_ui->sendButton->setEnabled(hasFrameId);
+        m_ui->sendButton->setToolTip(hasFrameId
+                                     ? QString() : tr("Cannot send because no Frame ID was given."));
+    };
+    connect(m_ui->frameIdEdit, &QLineEdit::textChanged, frameIdTextChanged);
+    frameIdTextChanged();
+
     connect(m_ui->sendButton, &QPushButton::clicked, [this]() {
         const uint frameId = m_ui->frameIdEdit->text().toUInt(nullptr, 16);
         QString data = m_ui->payloadEdit->text();