Qt: Allow shift-double-clicking on a frame link.

You can open a new packet window in the GTK+ UI by holding down the
shift key and double-clicking on a frame link in the protocol tree. Add
this behavior to the Qt UI. Document the different ways of opening a new
packet window and update the image.

Change-Id: I55caf6cc8089a6c305fafd47b4870e7c69dbfb10
Reviewed-on: https://code.wireshark.org/review/7101
Reviewed-by: Gerald Combs <gerald@wireshark.org>

docbook/wsug_src/WSUG_chapter_work.asciidoc

@@ -30,16 +30,25 @@ You can also select and view packets the same way while Wireshark is capturing
 if you selected ``Update list of packets in real time'' in the ``Capture
 Preferences'' dialog box.
 
-In addition, you can view individual packets in a separate window as shown in
-<<ChWorkPacketSepView>>. Do this by selecting the packet in which you are
-interested in the packet list pane, and then select menu:View[Show Packet in New
-Window]. This allows you to easily compare two or even more packets.
+In addition you can view individual packets in a separate window as shown in
+<<ChWorkPacketSepView>>. You can do this by double-clicking on an item in the
+packet list or by selecting the packet in which you are interested in the packet
+list pane and selecting menu:View[Show Packet in New Window]. This allows you to
+easily compare two or more packets, even across multiple files.
 
 [[ChWorkPacketSepView]]
 
 .Viewing a packet in a separate window
 image::wsug_graphics/ws-packet-sep-win.png[]
 
+Along with double-clicking the packet list and using the main menu there are a
+number of other ways to open a new packet window:
+
+- Hold down the shift key and double-click on a frame link in the packet
+  details.
+- From <<PacketListPopupMenuTable>>.
+- From <<PacketDetailsPopupMenuTable>>.
+
 [[ChWorkDisplayPopUpSection]]
 
 === Pop-up menus

ui/qt/main_window.cpp

@@ -393,6 +393,8 @@ MainWindow::MainWindow(QWidget *parent) :
             main_ui_->statusBar, SLOT(pushFieldStatus(QString&)));
     connect(proto_tree_, SIGNAL(protoItemSelected(field_info *)),
             this, SLOT(setMenusForSelectedTreeRow(field_info *)));
+    connect(proto_tree_, SIGNAL(openPacketInNewWindow(bool)),
+            this, SLOT(openPacketDialog(bool)));
 
     connect(byte_view_tab_, SIGNAL(byteFieldHovered(QString&)),
             main_ui_->statusBar, SLOT(pushByteStatus(QString&)));

ui/qt/packet_list.cpp

@@ -433,7 +433,7 @@ PacketList::PacketList(QWidget *parent) :
 void PacketList::setProtoTree (ProtoTree *proto_tree) {
     proto_tree_ = proto_tree;
 
-    connect(proto_tree_, SIGNAL(goToFrame(int)), this, SLOT(goToPacket(int)));
+    connect(proto_tree_, SIGNAL(goToPacket(int)), this, SLOT(goToPacket(int)));
     connect(proto_tree_, SIGNAL(relatedFrame(int)), this, SLOT(addRelatedFrame(int)));
 }
 

ui/qt/proto_tree.cpp

@@ -455,7 +455,11 @@ void ProtoTree::itemDoubleClick(QTreeWidgetItem *item, int column) {
     fi = item->data(0, Qt::UserRole).value<field_info *>();
 
     if(fi->hfinfo->type == FT_FRAMENUM) {
-        emit goToFrame(fi->value.value.uinteger);
+        if (QApplication::queryKeyboardModifiers() & Qt::ShiftModifier) {
+            emit openPacketInNewWindow(true);
+        } else {
+            emit goToPacket(fi->value.value.uinteger);
+        }
     }
 
     if(FI_GET_FLAG(fi, FI_URL) && IS_FT_STRING(fi->hfinfo->type)) {

ui/qt/proto_tree.h

@@ -51,7 +51,8 @@ private:
 signals:
     void protoItemSelected(QString &);
     void protoItemSelected(field_info *);
-    void goToFrame(int);
+    void openPacketInNewWindow(bool);
+    void goToPacket(int);
     void relatedFrame(int);
 
 public slots: