UX: Auto expand port group and allow deselect in PortsWindow

client/portswindow.cpp

@@ -373,7 +373,22 @@ void PortsWindow::when_portView_currentChanged(const QModelIndex& currentIndex,
 void PortsWindow::when_portModel_dataChanged(const QModelIndex& topLeft,
     const QModelIndex& bottomRight)
 {
-    qDebug("In %s", __FUNCTION__);
+    qDebug("In %s %d:(%d, %d) - %d:(%d, %d)", __FUNCTION__,
+            topLeft.parent().isValid(), topLeft.row(), topLeft.column(),
+            bottomRight.parent().isValid(), bottomRight.row(), bottomRight.column());
+
+    if (!topLeft.isValid() || !bottomRight.isValid())
+        return;
+
+    if (topLeft.parent() != bottomRight.parent())
+        return;
+
+    // If a port has changed, expand the port group
+    if (topLeft.parent().isValid())
+        tvPortList->expand(proxyPortModel ? 
+                proxyPortModel->mapFromSource(topLeft.parent()) : 
+                topLeft.parent());
+
 #if 0 // not sure why the >= <= operators are not overloaded in QModelIndex
     if ((tvPortList->currentIndex() >= topLeft) &&
         (tvPortList->currentIndex() <= bottomRight))

client/portswindow.ui

@@ -22,7 +22,7 @@
      <property name="childrenCollapsible">
       <bool>false</bool>
      </property>
-     <widget class="QTreeView" name="tvPortList">
+     <widget class="XTreeView" name="tvPortList">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
         <horstretch>1</horstretch>
@@ -368,6 +368,11 @@
    <header>deviceswidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>XTreeView</class>
+   <extends>QTreeView</extends>
+   <header>xtreeview.h</header>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="ostinato.qrc"/>

client/xtreeview.h

@@ -0,0 +1,50 @@
+/*
+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_TREE_VIEW_H
+#define _X_TREE_VIEW_H
+
+#include <QTreeView>
+
+#include <QMouseEvent>
+
+#if QT_VERSION >= 0x050000
+#error "Do we even need this anymore?"
+#endif
+
+class XTreeView : public QTreeView
+{
+public:
+    XTreeView(QWidget *parent) : QTreeView(parent) {}
+    virtual ~XTreeView() {}
+
+private:
+    virtual void mousePressEvent(QMouseEvent *event)
+    {
+        QModelIndex item = indexAt(event->pos());
+
+        if (!item.isValid())
+            setCurrentIndex(QModelIndex());
+
+        QTreeView::mousePressEvent(event);
+    }
+};
+
+#endif
+