1 files changed, 145 insertions, 3 deletions

diff --git a/doc/src/examples/googlesuggest.qdoc b/doc/src/examples/googlesuggest.qdoc
index bec242d..ab8ab57 100644
--- a/doc/src/examples/googlesuggest.qdoc
+++ b/doc/src/examples/googlesuggest.qdoc
@@ -43,10 +43,152 @@
     \example network/googlesuggest
     \title Google Suggest Example
 
-    The Google Suggest example shows how to use the network access manager
-    to get the list of suggested search terms from Google.
+    The Google Suggest example demonstrates how to use the QNetworkAccessManager
+    class to obtain a list of suggestions from the Google search engine as the 
+    user types into a QLineEdit.
 
     \image googlesuggest-example.png
 
-    \note The Google Suggest suggestion service is a registered trademark of Google Inc.
+    The application makes use of the \c get function in
+    QNetworkAccessManager to post a request and obtain the result of the search
+    query sent to the Google search engine. The results returned are listed as
+    clickable links appearing below the search box as a drop-down menu.
+
+    The widget is built up by a QLineEdit as the search box, and a QTreeView
+    used as a popup menu below the search box.
+
+    \section1 GSuggestCompletion Class Declaration
+
+    This class implements an event filter and a number of functions to display
+    the search results and to determent when and how to perform the search.
+
+    \snippet examples/network/googlesuggest/googlesuggest.h 1
+
+    The class connects to a QLineEdit and uses a QTreeWidget to display the
+    results. A QTimer controls the start of the network requests that are
+    executed using a QNetworkAccessManager.
+
+    \section1 GSuggestCompletion Class Implementation
+
+    We start by defining a constant containing the URL to be used in the Google
+    queries. This is the basis for the query. The letters typed into the search
+    box will be added to the query to perform the search itself.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 1
+
+    In the constructor, we set the parent of this GSuggestCompletion instance
+    to be the QLineEdit passed in. For simplicity, the QLineEdit is also stored
+    in the explicit \c editor member variable.
+
+    We then create a QTreeWidget as a toplevel widget and configure the various
+    properties to give it the look of a popup widget.
+
+    The popup will be populated by the results returned from Google. We set
+    the number of columns to be two, since we want to display both the
+    suggested search term and the number of hits it will trigger in the search
+    engine.
+
+    Furthermore, we install the GSuggestCompletion instance as an event filter
+    on the QTreeWidget, and connect the \c itemClicked() signal with the \c
+    doneCompletion() slot.
+
+    A single-shot QTimer is used to start the request when the user has stopped
+    typing for 500 ms.
+
+    Finally, we connect the networkManagers \c finished() signal with the \c
+    handleNetworkData() slot to handle the incoming data.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 2
+
+    Since the QTreeWidget popup has been instantiated as a toplevel widget, the
+    destructor has to delete it explicitly from memory to avoid a memory leak.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 3
+
+    The event filter handles mouse press and key press events that are
+    delivered to the popup. For mouse press events we just hide the popup and
+    return focus to the editor widget, and then return true to prevent further
+    event processing.
+
+    Key event handling is implemented so that Enter and Return execute the
+    selected link, while the Escape key hides the popup. Sine we want to be
+    able to navigate the list of suggestions using the different navigation
+    keys on the keyboard we let Qt continue regular event processing for those
+    by returning false from the eventFilter reimplementation.
+
+    For all other keys, the event will be passed on to the editor widget and the
+    popup is hidden. This way the user's typing will not be interrupted by the
+    popping up of the completion list.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 4
+
+    The \c showCompletion() function populates the QTreeWidget with the results
+    returned from the query. It takes two QStringLists, one with the suggested
+    search terms and the other with the corresponding number of hits.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 5
+
+    A QTreeWidgetItem is created for each index in the list and inserted into
+    the QTreeWidget. Finally, we adjust position and size of the popup to make
+    sure that it pops up in the correct position below the editor, and show it.
+
+    The \c doneCompletion() function, which is called by the event filter when
+    either Enter or Return keys are pressed, stops the timer to prevent further
+    requests and passes the text of the selected item to the editor. We then
+    make the \c editor QLineEdit emit the returnPressed() signal, to which the
+    application can connect to open the respective web page.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 6
+
+    The \c autoSuggest() slot is called when the timer times out, and uses the
+    text in the editor to build the complete search query. The query is then
+    passed to the QNetworkAccessManager's \c get() function to start the
+    request.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 7
+
+    The function \c preventSuggest() stops the timer to prevent further
+    requests from being started.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 8
+
+    When the network request is finished, the QNetworkAccessManager delivers the
+    data received from the server through the networkReply object.
+
+    \snippet examples/network/googlesuggest/googlesuggest.cpp 9
+
+    To extract the data from the reply we use the \c readAll() function, which
+    is inherited from QIODevice and returns a QByteArray. Since this data is
+    encoded in XML we can use a QXmlStreamReader to traverse the data and
+    extract the search result as QStrings, which we can stream into two
+    QStringLists used to populate the popup.
+
+    Finally, we schedule the QNetworkReply object for deletion using the \c
+    deleteLater function.
+
+    \section1 SearchBox Class Declaration
+
+    The SearchBox class inherits QLineEdit and adds the protected slot \c
+    doSearch().
+
+    A \c GSuggestCompletion member provides the SearchBox with the request
+    functionality and the suggestions returned from the Google search engine.
+
+    \snippet examples/network/googlesuggest/searchbox.h 1
+
+    \section1 SearchBox Class Implementation
+
+    The search box constructor instantiates the GSuggestCompletion object and
+    connects the returnPressed() signal to the doSearch() slot.
+
+    \snippet examples/network/googlesuggest/searchbox.cpp 1
+
+    The function \c doSearch() stops the completer from sending any further
+    queries to the search engine.
+
+    Further, the function extracts the selected search phrase and opens it
+    in the default web browser using QDesktopServices.
+
+    \snippet examples/network/googlesuggest/searchbox.cpp 2
+
 */