implement options model, show current options in options dialog

gui/include/mainoptionspage.h

@@ -3,11 +3,30 @@
 
 #include <QWidget>
 
+QT_BEGIN_NAMESPACE
+class QDataWidgetMapper;
+class QCheckBox;
+class QLineEdit;
+QT_END_NAMESPACE
+
+class OptionsModel;
+
 class MainOptionsPage : public QWidget
 {
     Q_OBJECT
 public:
-    explicit MainOptionsPage(QWidget *parent = 0);
+    explicit MainOptionsPage(QWidget *parent=0);
+
+    void setMapper(QDataWidgetMapper *mapper);
+private:
+    QCheckBox *bitcoin_at_startup;
+    QCheckBox *minimize_to_tray;
+    QCheckBox *map_port_upnp;
+    QCheckBox *minimize_on_close;
+    QCheckBox *connect_socks4;
+    QLineEdit *proxy_ip;
+    QLineEdit *proxy_port;
+    QLineEdit *fee_edit;
 
 signals: