Move the '@' button next to main input

not really needed on the 10-key, so replace that with minus sign

this also adds feature to select a line item, then click ITEM to
re-ring the same item (and honor set quantity)

wuttapos/controls/tenkey.py

@@ -53,7 +53,7 @@ class WuttaTenkeyMenu(WuttaControl):
         ]
         if not self.simple:
             row1.extend([
-                self.make_tenkey_button("@"),
+                self.make_tenkey_button("-"),
             ])
 
         row2 = [

wuttapos/views/pos.py

@@ -78,8 +78,10 @@ class POSView(WuttaView):
         """
         # clear set (@) quantity
         if clear_quantity:
+            if self.set_quantity.data:
                 self.set_quantity.data = None
                 self.set_quantity.value = None
+                self.set_quantity_button.visible = True
 
         # clear/focus main input
         self.main_input.value = ''
@@ -114,6 +116,15 @@ class POSView(WuttaView):
             if not self.attempt_add_product():
                 self.item_lookup(value)
 
+        elif self.selected_item:
+            row = self.selected_item.data['row']
+            if row.product_uuid:
+                if self.attempt_add_product(uuid=row.product_uuid):
+                    self.clear_item_selection()
+                    self.page.update()
+            else:
+                self.item_lookup()
+
         else:
             self.item_lookup()
 
@@ -504,34 +515,6 @@ class POSView(WuttaView):
                 self.customer_lookup()
 
     def tenkey_char(self, key):
-
-        if key == '@':
-            quantity = self.main_input.value
-            valid = False
-
-            if self.set_quantity.data is not None:
-                quantity = self.set_quantity.data
-                self.show_snackbar(f"QUANTITY ALREADY SET: {quantity}", bgcolor='yellow')
-
-            else:
-                try:
-                    quantity = decimal.Decimal(quantity)
-                    valid = True
-                except decimal.InvalidOperation:
-                    pass
-
-                if valid and quantity:
-                    self.set_quantity.data = quantity
-                    self.set_quantity.value = self.app.render_quantity(quantity) + " @ "
-                    self.main_input.value = ""
-                    self.main_input.focus()
-
-                else:
-                    self.show_snackbar(f"INVALID @ QUANTITY: {quantity}", bgcolor='yellow')
-
-            self.page.update()
-
-        else: # normal char
         self.main_input.value = f"{self.main_input.value or ''}{key}"
         self.main_input.focus()
         self.page.update()
@@ -630,6 +613,7 @@ class POSView(WuttaView):
             elif self.set_quantity.data is not None:
                 self.set_quantity.data = None
                 self.set_quantity.value = None
+                self.set_quantity_button.visible = True
             elif self.selected_item:
                 self.clear_item_selection()
             self.main_input.focus()
@@ -743,15 +727,27 @@ class POSView(WuttaView):
 
         self.set_quantity = ft.Text(value=None, data=None, weight=ft.FontWeight.BOLD, size=40)
 
+        self.set_quantity_button = self.make_button("@",
+                                                    font_size=40,
+                                                    height=70,
+                                                    width=70,
+                                                    bgcolor='green',
+                                                    on_click=self.set_quantity_click)
+
         return [
             self.build_header(),
 
             ft.Row(
                 [
                     self.make_logo_image(height=80),
+                    ft.Row(
+                        [
                             ft.Row(
                                 [
                                     self.set_quantity,
+                                    self.set_quantity_button,
+                                ],
+                            ),
                             self.main_input,
                             self.make_button("⌫", font_size=40, bgcolor='green',
                                              height=70, width=70,
@@ -799,6 +795,33 @@ class POSView(WuttaView):
         kwargs.setdefault('size', 24)
         return ft.Text(*args, **kwargs)
 
+    def set_quantity_click(self, e):
+        quantity = self.main_input.value
+        valid = False
+
+        if self.set_quantity.data is not None:
+            quantity = self.set_quantity.data
+            self.show_snackbar(f"QUANTITY ALREADY SET: {quantity}", bgcolor='yellow')
+
+        else:
+            try:
+                quantity = decimal.Decimal(quantity)
+                valid = True
+            except decimal.InvalidOperation:
+                pass
+
+            if valid and quantity:
+                self.set_quantity.data = quantity
+                self.set_quantity.value = self.app.render_quantity(quantity) + " @ "
+                self.set_quantity_button.visible = False
+                self.main_input.value = ""
+                self.main_input.focus()
+
+            else:
+                self.show_snackbar(f"INVALID @ QUANTITY: {quantity}", bgcolor='yellow')
+
+        self.page.update()
+
     def make_tender_button(self, tender, **kwargs):
         if isinstance(tender, self.model.Tender):
             info = {'tender_code': tender.code,