From 35ae55bb4de191ab1c4570f35ef90a70fc69ef90 Mon Sep 17 00:00:00 2001
From: Joe Taylor <k1jt@arrl.org>
Date: Mon, 12 Mar 2018 18:01:25 +0000
Subject: [PATCH] Don't allow transmitting an all-blank message.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8556 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
---
 mainwindow.cpp | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/mainwindow.cpp b/mainwindow.cpp
index 888de5844..09826e2ca 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -3283,7 +3283,21 @@ void MainWindow::guiUpdate()
     }
 
     float fTR=float((ms%(1000*m_TRperiod)))/(1000*m_TRperiod);
-    if(g_iptt==0 and ((m_bTxTime and fTR<0.75) or m_tune )) {   //### Allow late starts
+
+    QString txMsg;
+    if(m_ntx == 1) txMsg=ui->tx1->text();
+    if(m_ntx == 2) txMsg=ui->tx2->text();
+    if(m_ntx == 3) txMsg=ui->tx3->text();
+    if(m_ntx == 4) txMsg=ui->tx4->text();
+    if(m_ntx == 5) txMsg=ui->tx5->currentText();
+    if(m_ntx == 6) txMsg=ui->tx6->text();
+    if(m_ntx == 7) txMsg=ui->genMsg->text();
+    if(m_ntx == 8) txMsg=ui->freeTextMsg->currentText();
+    int msgLength=txMsg.trimmed().length();
+    if(msgLength==0) on_stopTxButton_clicked();
+
+    if(g_iptt==0 and ((m_bTxTime and fTR<0.75) or m_tune ) and
+       (msgLength>0)) {                          //### Allow late starts
       icw[0]=m_ncw;
       g_iptt = 1;
       setRig ();