Creating an off_focus hook in TextBox2D

fury/data/files/test_ui_textbox.json

@@ -1 +1 @@
-{"CharEvent": 36, "MouseMoveEvent": 400, "KeyPressEvent": 36, "KeyReleaseEvent": 36, "LeftButtonPressEvent": 1, "LeftButtonReleaseEvent": 1, "RightButtonPressEvent": 0, "RightButtonReleaseEvent": 0, "MiddleButtonPressEvent": 0, "MiddleButtonReleaseEvent": 0}
+{"CharEvent": 75, "MouseMoveEvent": 1, "KeyPressEvent": 77, "KeyReleaseEvent": 75, "LeftButtonPressEvent": 2, "LeftButtonReleaseEvent": 2, "RightButtonPressEvent": 0, "RightButtonReleaseEvent": 0, "MiddleButtonPressEvent": 0, "MiddleButtonReleaseEvent": 0}

fury/ui/elements.py

@@ -100,6 +100,8 @@ def __init__(self, width, height, text="Enter Text", position=(100, 10),
         self.caret_pos = 0
         self.init = True
 
+        self.off_focus = lambda ui: None
+
     def _setup(self):
         """Setup this UI component.
 
@@ -186,11 +188,12 @@ def handle_character(self, key, key_char):
         ----------
         character : str
         """
-        if key_char != '' and key_char in printable:
-            self.add_character(key_char)
-        elif key.lower() == "return":
+        if key.lower() == "return":
             self.render_text(False)
+            self.off_focus(self)
             return True
+        elif key_char != '' and key_char in printable:
+            self.add_character(key_char)
         if key.lower() == "backspace":
             self.remove_character()
         elif key.lower() == "left":
@@ -1740,9 +1743,9 @@ def _setup(self):
         # Option's button
         self.button_icons = []
         self.button_icons.append(('unchecked',
-                                 read_viz_icons(fname="stop2.png")))
+                                  read_viz_icons(fname="stop2.png")))
         self.button_icons.append(('checked',
-                                 read_viz_icons(fname="checkmark.png")))
+                                  read_viz_icons(fname="checkmark.png")))
         self.button = Button2D(icon_fnames=self.button_icons,
                                size=self.button_size)
 
@@ -2396,7 +2399,7 @@ def _setup(self):
         scroll_bar_height = self.nb_slots * (size[1] - 2 * self.margin) \
             / len(self.values)
         self.scroll_bar = Rectangle2D(size=(int(size[0]/20),
-                                      scroll_bar_height))
+                                            scroll_bar_height))
         if len(self.values) <= self.nb_slots:
             self.scroll_bar.set_visibility(False)
         self.panel.add_element(

fury/ui/tests/test_elements.py

@@ -31,6 +31,15 @@ def test_ui_textbox(recording=False):
     another_textbox_test = ui.TextBox2D(height=3, width=10, text="Enter Text")
     another_textbox_test.set_message("Enter Text")
 
+    # Checking whether textbox went out of focus
+    is_off_focused = [False]
+
+    def _off_focus(textbox):
+        is_off_focused[0] = True
+
+    # Set up a callback when textbox went out of focus
+    textbox_test.off_focus = _off_focus
+
     # Assign the counter callback to every possible event.
     event_counter = EventCounter()
     event_counter.monitor(textbox_test)
@@ -50,6 +59,8 @@ def test_ui_textbox(recording=False):
         expected = EventCounter.load(expected_events_counts_filename)
         event_counter.check_counts(expected)
 
+    npt.assert_equal(is_off_focused[0], True)
+
 
 def test_ui_line_slider_2d_horizontal_bottom(recording=False):
     filename = "test_ui_line_slider_2d_horizontal_bottom"