URL box is now focussed when "Open Network Stream" dialog box opens.

The URL box in the "Open Network Stream" dialog has now always focus
when opened and its content is automatically selected.
The patch is for ticket #4361 and was created as a part of a GCI-task
(http://www.google-melange.com/gci/task/show/google/gci2010/videolan/t129200306101).
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/qt4/components/open_panels.cpp

@@ -594,6 +594,12 @@ NetOpenPanel::~NetOpenPanel()
 void NetOpenPanel::clear()
 {}
 
+void NetOpenPanel::onFocus()
+{
+    ui.urlComboBox->setFocus();
+    ui.urlComboBox->lineEdit()->selectAll();
+}
+
 static int strcmp_void( const void *k, const void *e )
 {
     return strcmp( (const char *)k, (const char *)e );

modules/gui/qt4/components/open_panels.hpp

@@ -74,6 +74,7 @@ public:
     }
     virtual ~OpenPanel() {};
     virtual void clear() = 0;
+    virtual void onFocus() {}
 protected:
     intf_thread_t *p_intf;
 public slots:
@@ -140,6 +141,7 @@ public:
     NetOpenPanel( QWidget *, intf_thread_t * );
     virtual ~NetOpenPanel();
     virtual void clear() ;
+    void onFocus();
 private:
     Ui::OpenNetwork ui;
     QStringListModel *mrlList;

modules/gui/qt4/dialogs/open.cpp

@@ -240,15 +240,25 @@ void OpenDialog::showTab( int i_tab )
     if( i_tab == OPEN_CAPTURE_TAB ) captureOpenPanel->initialize();
     ui.Tab->setCurrentIndex( i_tab );
     show();
+    if( ui.Tab->currentWidget() != NULL )
+    {
+        OpenPanel *panel = dynamic_cast<OpenPanel *>( ui.Tab->currentWidget() );
+        assert( panel );
+        panel->onFocus();
+    }
 }
 
 /* Function called on signal currentChanged triggered */
 void OpenDialog::signalCurrent( int i_tab )
 {
     if( i_tab == OPEN_CAPTURE_TAB ) captureOpenPanel->initialize();
-
     if( ui.Tab->currentWidget() != NULL )
-        ( dynamic_cast<OpenPanel *>( ui.Tab->currentWidget() ) )->updateMRL();
+    {
+        OpenPanel *panel = dynamic_cast<OpenPanel *>( ui.Tab->currentWidget() );
+        assert( panel );
+        panel->onFocus();
+        panel->updateMRL();
+    }
 }
 
 void OpenDialog::toggleAdvancedPanel()