UX: Add text hint about stream list

Remove text about how to create streams from Apply text hint. Make
hint text copy consistent across all hints

client/portswindow.ui

@@ -54,7 +54,7 @@
            <string>&lt;p&gt;&lt;b&gt;How to use Ostinato&lt;/b&gt;&lt;/p&gt;
 &lt;p&gt;The port list on the left contains all the ports on which you can transmit packets.&lt;/p&gt;
 &lt;p&gt;Ports belong to a port group. Make sure the Port Group has a &lt;img src=&quot;:/icons/bullet_green.png&quot;/&gt; next to it, then double click the port group to show or hide the ports in the port group.&lt;/p&gt;
-&lt;p&gt;To generate packets, you need to create and configure packet streams. A stream is a sequence of one or more same or similar packets.&lt;/p&gt;
+&lt;p&gt;To generate packets, you need to create and configure packet streams. A stream is a sequence of one or more packets.&lt;/p&gt;
 &lt;p&gt;To create a stream, select the port on which you want to send packets.&lt;/p&gt;
 &lt;hr/&gt;
 &lt;p&gt;Don't see the port that you want (or any ports at all) inside the port group? &lt;a href=&quot;http://ostinato.org/docs/faq&quot;&gt;Get Help!&lt;/a&gt;&lt;/p&gt;</string>
@@ -93,7 +93,7 @@
            <string>&lt;p&gt;You have selected a port group in the port list on the left.&lt;/p&gt;
 &lt;p&gt;You can transmit packets on any of the ports within the port group.&lt;/p&gt;
 &lt;p&gt;Make sure the port group has a &lt;img src=&quot;:/icons/bullet_green.png&quot;/&gt; next to it and then double click the port group to show or hide the ports in the port group.&lt;/p&gt;
-&lt;p&gt;To generate packets, you need to create and configure packet streams. A stream is a sequence of one or more same or similar packets.&lt;/p&gt;
+&lt;p&gt;To generate packets, you need to create and configure packet streams. A stream is a sequence of one or more packets.&lt;/p&gt;
 &lt;p&gt;To create a stream, select the port on which you want to send packets. &lt;/p&gt;</string>
           </property>
           <property name="alignment">
@@ -152,7 +152,7 @@
            <item>
             <widget class="QLabel" name="label_3">
              <property name="text">
-              <string>Right click in the blank area below to configure streams. Click Apply on the right to activate the changes</string>
+              <string>Configuration Changed? Click Apply on the right to activate the changes</string>
              </property>
             </widget>
            </item>
@@ -221,7 +221,7 @@
              </layout>
             </item>
             <item>
-             <widget class="QTableView" name="tvStreamList">
+             <widget class="XTableView" name="tvStreamList">
               <property name="sizePolicy">
                <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
                 <horstretch>0</horstretch>
@@ -231,6 +231,13 @@
               <property name="contextMenuPolicy">
                <enum>Qt::ActionsContextMenu</enum>
               </property>
+              <property name="whatsThis">
+               <string>This is the stream list for the selected port
+
+A stream is a sequence of one or more packets
+
+Right-click to create a stream</string>
+              </property>
               <property name="frameShape">
                <enum>QFrame::StyledPanel</enum>
               </property>
@@ -373,6 +380,11 @@
    <extends>QTreeView</extends>
    <header>xtreeview.h</header>
   </customwidget>
+  <customwidget>
+   <class>XTableView</class>
+   <extends>QTableView</extends>
+   <header>xtableview.h</header>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="ostinato.qrc"/>

client/xtableview.h

@@ -0,0 +1,48 @@
+/*
+Copyright (C) 2017 Srivats P.
+
+This file is part of "Ostinato"
+
+This 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 3 of the License, or
+(at your option) any later version.
+
+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 _X_TABLE_VIEW_H
+#define _X_TABLE_VIEW_H
+
+#include <QTableView>
+
+#include <QPainter>
+
+class XTableView : public QTableView
+{
+public:
+    XTableView(QWidget *parent) : QTableView(parent) {}
+    virtual ~XTableView() {}
+
+protected:
+    virtual void paintEvent(QPaintEvent *event)
+    {
+        if (!model()->hasChildren())  {
+            QPainter painter(viewport());
+            style()->drawItemText(&painter, viewport()->rect(),
+                    layoutDirection() | Qt::AlignCenter, palette(),
+                    true, whatsThis(), QPalette::WindowText);
+        }
+        else
+            QTableView::paintEvent(event);
+    }
+};
+
+#endif
+