Add scroll bar, up/down keys for item, customer lookup dialogs

wuttapos/controls/lookup.py

@@ -37,6 +37,8 @@ class WuttaLookup(WuttaControl):
     default_button_height_dlg = 80
     disabled_bgcolor = '#aaaaaa'
 
+    long_scroll_delta = 500
+
     def __init__(self, *args, **kwargs):
         self.initial_search = kwargs.pop('initial_search', None)
         self.on_select = kwargs.pop('on_select', None)
@@ -45,7 +47,7 @@ class WuttaLookup(WuttaControl):
 
         # track current selection
         self.selected_uuid = None
-        self.selected_control = None
+        self.selected_datarow = None
 
     def build(self):
 
@@ -57,22 +59,43 @@ class WuttaLookup(WuttaControl):
         self.search_results = ft.DataTable(
             columns=[ft.DataColumn(self.make_cell_text(text))
                      for text in self.get_results_columns()],
+            data_row_min_height=50,
         )
 
         self.no_results = ft.Text("NO RESULTS", size=32, color='red',
                                   weight=ft.FontWeight.BOLD,
                                   visible=False)
 
-        self.select_button = ft.Container(
+        self.select_button = self.make_button("Select",
-            content=ft.Text("Select", size=self.font_size * 0.8),
+                                              font_size=self.font_size * 0.8,
-            alignment=ft.alignment.center,
                                               height=self.default_button_height_dlg * 0.8,
                                               width=self.default_button_height_dlg * 1.3,
-            border=ft.border.all(1, 'black'),
+                                              on_click=self.select_click,
-            border_radius=ft.border_radius.all(5),
-            on_click=self.select_object,
                                               disabled=True,
-            bgcolor=self.disabled_bgcolor,
+                                              bgcolor=self.disabled_bgcolor)
+
+        self.up_button = self.make_button("↑",
+                                          font_size=self.font_size,
+                                          height=self.default_button_height_dlg,
+                                          width=self.default_button_height_dlg,
+                                          on_click=self.up_click,
+                                          on_long_press=self.up_longpress)
+
+        self.down_button = self.make_button("↓",
+                                            font_size=self.font_size,
+                                            height=self.default_button_height_dlg,
+                                            width=self.default_button_height_dlg,
+                                            on_click=self.down_click,
+                                            on_long_press=self.down_longpress)
+
+        self.search_results_wrapper = ft.Column(
+            [
+                self.search_results,
+                self.no_results,
+            ],
+            expand=True,
+            height=400,
+            scroll=ft.ScrollMode.AUTO,
         )
 
         return ft.Column(
@@ -118,17 +141,24 @@ class WuttaLookup(WuttaControl):
                 ft.Divider(),
                 ft.Row(
                     [
+                        self.search_results_wrapper,
+                        ft.VerticalDivider(),
                         ft.Column(
                             [
-                                self.search_results,
-                                self.no_results,
-                            ],
-                            expand=True,
-                        ),
                                 self.select_button,
+                                ft.Row(),
+                                ft.Row(),
+                                ft.Row(),
+                                ft.Row(),
+                                ft.Row(),
+                                self.up_button,
+                                self.down_button,
                             ],
                         ),
                     ],
+                    vertical_alignment=ft.CrossAxisAlignment.START,
+                ),
+            ],
         )
 
     def get_results_columns(self):
@@ -190,7 +220,8 @@ class WuttaLookup(WuttaControl):
 
         if results:
             for obj in results:
-                self.search_results.rows.append(ft.DataRow(
+                self.search_results.rows.append(
+                    ft.DataRow(
                         cells=[self.make_cell(row)
                                for row in self.make_result_row(obj)],
                         on_select_changed=self.select_changed,
@@ -210,33 +241,65 @@ class WuttaLookup(WuttaControl):
         self.search_results.rows.clear()
         self.no_results.visible = False
         self.selected_uuid = None
+        self.selected_datarow = None
         self.select_button.disabled = True
         self.select_button.bgcolor = self.disabled_bgcolor
         self.searchbox.focus()
         self.update()
 
-    def select_changed(self, e):
+    def set_selection(self, row):
+        if self.selected_datarow:
+            self.selected_datarow.color = None
+
+        row.color = ft.colors.BLUE
+        self.selected_uuid = row.data['uuid']
+        self.selected_datarow = row
 
-        if e.data: # selected
-            if self.selected_control:
-                self.selected_control.color = None
-            self.selected_uuid = e.control.data['uuid']
-            self.selected_control = e.control
-            self.selected_control.color = ft.colors.BLUE
         self.select_button.disabled = False
         self.select_button.bgcolor = 'blue'
-        else:
-            if self.selected_control:
-                self.selected_control.color = None
-            self.selected_control = None
-            self.selected_uuid = None
-            self.select_button.disabled = True
-            self.select_button.bgcolor = self.disabled_bgcolor
-            e.control.color = None
 
+    def select_changed(self, e):
+        if e.data: # selected
+            self.set_selection(e.control)
             self.update()
 
-    def select_object(self, e):
+    def up_click(self, e):
+
+        # select previous row, if selection in progress
+        if self.selected_datarow:
+            i = self.search_results.rows.index(self.selected_datarow)
+            if i > 0:
+                self.search_results_wrapper.scroll_to(delta=-48, duration=100)
+                self.set_selection(self.search_results.rows[i - 1])
+                self.update()
+                return
+
+        self.search_results_wrapper.scroll_to(delta=-50, duration=100)
+        self.update()
+
+    def up_longpress(self, e):
+        self.search_results_wrapper.scroll_to(delta=-self.long_scroll_delta, duration=100)
+        self.update()
+
+    def down_click(self, e):
+
+        # select next row, if selection in progress
+        if self.selected_datarow:
+            i = self.search_results.rows.index(self.selected_datarow)
+            if (i + 1) < len(self.search_results.rows):
+                self.search_results_wrapper.scroll_to(delta=48, duration=100)
+                self.set_selection(self.search_results.rows[i + 1])
+                self.update()
+                return
+
+        self.search_results_wrapper.scroll_to(delta=50, duration=100)
+        self.update()
+
+    def down_longpress(self, e):
+        self.search_results_wrapper.scroll_to(delta=self.long_scroll_delta, duration=100)
+        self.update()
+
+    def select_click(self, e):
         if not self.selected_uuid:
             raise RuntimeError("no record selected?")
         if self.on_select: