closes #4: Allowed to multiselect items on voucher and delete them via context menu or Ctrl+Del shortcut.

shop/shopform.h

@@ -3,6 +3,8 @@
 
 #include <QWidget>
 #include <QList>
+#include <QScopedPointer>
+#include <QMenu>
 #include "data/shop-data.h"
 #include <autotablemodel.h>
 #include "settings/shopsettings.h"
@@ -50,12 +52,18 @@ private slots:
 
     void on_commoditySearch_returnPressed();
 
+    void on_actionDelete_items_triggered();
+
+    void on_actualReceipt_customContextMenuRequested(const QPoint &pos);
+
+
 private:
     Ui::ShopForm *ui;
     QSharedPointer<Voucher> m_voucher;
     AutoTableModel<VoucherItem> *m_itemsModel;
     AutoTableModel<ShopItem> *m_commodityModel;
     bool m_itemFound;
+    QScopedPointer<QMenu> m_itemCtxMenu;
 
     void loadLast();
     void loadButtons(const ShopSettingsPtr& settings);
@@ -67,6 +75,8 @@ private:
     void createEmptyVoucher();
     void addItem(QSharedPointer<IShopItem> item, int count);
     void setTotalText();
+    void recalculate();
+    void updateItemCount(VoucherItem *item, int oldCount);
 };
 
 #endif // SHOPFORM_H