FIX: Take precision into account for the line edit widget when in dec…

…imal and string display modes

pydm/tests/widgets/test_lineedit.py

@@ -85,7 +85,9 @@ def test_change_display_format_type(qtbot, display_format):
 
 @pytest.mark.parametrize("value, display_format, precision, scale, unit, show_unit, expected_display", [
     (123, DisplayFormat.Default, 3, 1, "s", True, "123.000 s"),
-    (123.47, DisplayFormat.Decimal, 3, 2, "seconds", False, "246.94"),
+    (123.47, DisplayFormat.Decimal, 3, 2, "seconds", False, "246.940"),
+    (123.4567, DisplayFormat.String, 2, 1, "", False, "123.46"),
+    (123.4567, DisplayFormat.Decimal, 1, 1, "", False, "123.5"),
     (1e2, DisplayFormat.Exponential, 2, 2, "light years", True, "2.00e+02 light years"),
     (0x1FF, DisplayFormat.Hex, 0, 1, "Me", True, "0x1ff Me"),
     (0b100, DisplayFormat.Binary, 0, 1, "KB", True, "0b100 KB"),

pydm/widgets/line_edit.py

@@ -127,7 +127,7 @@ def send_value(self):
                 self.send_value_signal[str].emit(send_value)
         except ValueError:
             logger.exception("Error trying to set data '{0}' with type '{1}' and format '{2}' at widget '{3}'."
-                         .format(self.text(), self.channeltype, self._display_format_type, self.objectName()))
+                             .format(self.text(), self.channeltype, self._display_format_type, self.objectName()))
 
         self.clearFocus()
         self.set_display()
@@ -260,11 +260,10 @@ def set_display(self):
         else:
             self._display = str(new_value)
 
-        if self._display_format_type == DisplayFormat.Default:
-            if isinstance(new_value, (int, float)):
-                self._display = str(self.format_string.format(new_value))
-                self.setText(self._display)
-                return
+        if isinstance(new_value, (int, float)):
+            self._display = str(self.format_string.format(new_value))
+            self.setText(self._display)
+            return
 
         if self._show_units:
             self._display = "{} {}".format(self._display, self._unit)
@@ -292,4 +291,3 @@ def strtobool(val):
             return 0
         else:
             raise ValueError("invalid boolean input")
-