Fix crash when attempting to add VPN connection when VPN service is not available

tdenetworkmanager/src/configwidgets/tdenetman-connection_setting_vpn_widget.cpp

@@ -31,6 +31,7 @@
 #include <tqcombobox.h>
 #include <tqiconset.h>
 #include <kiconloader.h>
+#include <kpushbutton.h>
 #include <tqwidgetstack.h>
 #include <kuser.h>
 
@@ -46,6 +47,7 @@ VPNWidgetImpl::VPNWidgetImpl(TDENetworkConnection* conn, bool new_conn, TQWidget
 	, _new_conn(new_conn)
 {
 	_vpnsetting = dynamic_cast<TDEVPNConnection*>(conn);
+	_parentdialog = dynamic_cast<ConnectionSettingsDialogImpl*>(parent);
 
 	TQVBoxLayout* layout = new TQVBoxLayout(this, 1, 1);
 	_mainWid = new ConnectionSettingVPNWidget(this);
@@ -61,7 +63,10 @@ VPNWidgetImpl::Init()
 	VPNServiceList list = VPNManager::getVPNServices();
 
 	if (list.isEmpty()) {
-		// FIXME Do something useful here
+		if (_parentdialog) {
+			_parentdialog->_disable_next_button = true;
+			_parentdialog->slotEnableButtons();
+		}
 	}
 	else {
 		int index = 0;
@@ -108,6 +113,10 @@ VPNWidgetImpl::Init()
 				slotServiceComboActivated(index - 1);
 			}
 		}
+		if (_parentdialog) {
+			_parentdialog->_disable_next_button = false;
+			_parentdialog->slotEnableButtons();
+		}
 	}
 
 	// lock the combo when editing an already existing connection

tdenetworkmanager/src/configwidgets/tdenetman-connection_settings_dialog.cpp

@@ -58,6 +58,7 @@ using namespace ConnectionSettings;
 
 ConnectionSettingsDialogImpl::ConnectionSettingsDialogImpl(TDENetworkConnection* conn, bool new_conn, TQByteArray networkextid, TQWidget* parent, const char* name, bool modal, WFlags fl)
 	: ConnectionSettingsDialog(parent, name, modal, fl)
+	, _disable_next_button(false)
 	, _conn(conn)
 	, _new_conn(new_conn)
 	, _networkextid(networkextid)
@@ -78,7 +79,7 @@ ConnectionSettingsDialogImpl::ConnectionSettingsDialogImpl(TDENetworkConnection*
 	pbCancel->setIconSet(SmallIcon("cancel", TQIconSet::Automatic));
 	pbSave->setIconSet(SmallIcon("ok", TQIconSet::Automatic));
 
-	// enable or disable buttons accroding to the current state
+	// enable or disable buttons according to the current state
 	slotEnableButtons();
 }
 
@@ -430,13 +431,13 @@ ConnectionSettingsDialogImpl::slotEnableButtons()
 	  Next: enabled if another widget is available
 	*/
 	enabled = true;
-	if (current == _widgetIds.fromLast()) {
+	if (current == _widgetIds.fromLast() || _disable_next_button) {
 		enabled = false;
 	}
 	pbNext->setEnabled(enabled);
 
 	/*
-		Back: enabled if the current widget has a predecessor
+	 Back: enabled if the current widget has a predecessor
 	*/
 	enabled = true;
 	if (current == _widgetIds.begin()) {
@@ -445,7 +446,7 @@ ConnectionSettingsDialogImpl::slotEnableButtons()
 	pbBack->setEnabled(enabled);
 
 	/*
-		Connect: only show connect if the connection is valid
+	 Connect: only show connect if the connection is valid
 	*/
 	if (_conn) {
 		TDEGlobalNetworkManager* nm = TDEGlobal::networkManager();

tdenetworkmanager/src/configwidgets/tdenetman-connection_settings_dialog.h

@@ -64,6 +64,9 @@ class ConnectionSettingsDialogImpl : public ConnectionSettingsDialog
 	signals:
 		void connectionSaved();
 
+	public:
+		bool _disable_next_button;
+
 	private:
 		void updateDialogForDeviceType();
 		void createWidgetsForConnection(TDENetworkConnection*, bool new_conn);