PrF UG classes replace superclass - Revision history

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__NOTOC__
== Replacing a Superclass ==

{{PrF_UG_TOC_classes}}<div id='prf_ug'>

You can move a class to a different superclass,
using drag-and-drop in the
[[PrF_UG_classes_class_browser|Class Browser]].
This will remove the class from one superclass and make it a subclass of another superclass.
Note that when you replace the superclass of a class,
the class will often lose and gain inherited slots.

<ul class='a'>
<li>
[[#Moving_a_Class|moving a class to another superclass]]


<li>
[[#Example|example]]

</ul>

=== Moving a Class ===

To move a class:

<ol class='a'>
<li>
Select the class you want to move.
If the class has more than one superclass,
select the view of the class that appears under the superclass you want to replace.


<li>
Hold down the mouse button and drag the class on top of the new superclass.


<li>
Release the mouse.
The subclass will no longer be under the original superclass,
but will now be located under the new superclass.
Note that the slots of the moved class will automatically change to reflect the inheritance from its new superclass.

</ol>

You can also
[[PrF_UG_classes_add_superclass|add a superclass]]
by holding down the Ctrl
(Cmd)
key while you drag.

=== Example ===

The following example shows how to make Columnist inherit from Employee,
rather than the class Person.

<ol class='a'>
<li>
Highlight Columnist in the
[[PrF_UG_classes_class_browser|Class Browser]].
Because Columnist has more than one superclass,
you must make sure to select the copy of Columnist that is under Employee. (When a class has more than one superclass,
you can use the Superclasses pane to select the copy that you want.
See
[[PrF_UG_classes_jump_to_superclass|Jumping to a Different Superclass]]
for more information.) Note that the
[[PrF_UG_classes_template_slot_pane|Template Slots Pane]]
for Columnist includes slots it inherits from Employee.

 <div>[[Image:PrF_UG_classes_superclass_drag_1.png|classes_superclass_drag_1]]</div>


<li>
Hold down the mouse button and drag Columnist on top of the new superclass Person.


<li>
Release the mouse button to drop the class.
Person is outlined and the
[[PrF_UG_classes_class_browser|Class Browser]]
redisplays to show the new hierarchy.
The dragged class and all of its subclasses,
if any,
will be moved from the original superclass to the new superclass.
 <div>[[Image:PrF_UG_classes_superclass_drag_2.png|classes_superclass_drag_2]]</div>

</ol>

If you highlight Columnist after it has been repositioned,
you will see that some of the slots it had before are now missing.
These were the slots it inherited from Employee.

<div>[[Image:PrF_UG_classes_superclass_drag_3.png|classes_superclass_drag_3]]</div>

</div>

@@ Line 2: / Line 2: @@
 == Replacing a Superclass ==
-{{PrF_UG_TOC_classes}}<div id='prf_ug'>
+<noinclude>{{PrF_UG_TOC_classes}}<div id='prf_ug'></noinclude>
 You can move a class to a different superclass,
@@ Line 88: / Line 88: @@
-</div>
+<noinclude></div></noinclude>

@@ Line 61: / Line 61: @@
      </p>
      <div>[[Image:PrF_UG_classes_superclass_drag_1.png|frame|none|
-            Class Browser with Columnist selected]]</div>
+            Class Browser, "Columnist" selected]]</div>
    <li><p>
@@ Line 77: / Line 77: @@
      </p>
      <div>[[Image:PrF_UG_classes_superclass_drag_2.png|frame|none|
-            Class Browser with Person outlined]]</div>
+            Class Browser, "Person" outlined, "Columnist" selected]]</div>
 </ol>
@@ Line 85: / Line 85: @@
 <div>[[Image:PrF_UG_classes_superclass_drag_3.png|frame|none|
-        Class Browser with slots missing]]</div>
+        Class Browser, "Columnist" selected, some slots missing]]</div>
 </div>

@@ Line 48: / Line 48: @@
 <ol class='a'>
    <li><p>
-     Highlight <b>Columnist</b> in the
+     Highlight <b>Columnist</b>
-    [[PrF_UG_classes_class_browser|Class Browser]].
+    in the [[PrF_UG_classes_class_browser|Class Browser]].
      Because <b>Columnist</b> has more than one superclass,
      you must make sure to select the copy of <b>Columnist</b>
@@ Line 86: / Line 86: @@
 <div>[[Image:PrF_UG_classes_superclass_drag_3.png|frame|none|
         Class Browser with slots missing]]</div>
 </div>

@@ Line 60: / Line 60: @@
      for <b>Columnist</b> includes slots it inherits from <b>Employee</b>.
      </p>
-     <div>[[Image:PrF_UG_classes_superclass_drag_1.png|classes_superclass_drag_1]]</div>
+     <div>[[Image:PrF_UG_classes_superclass_drag_1.png|frame|none|
    <li><p>
@@ Line 75: / Line 76: @@
      will be moved from the original superclass to the new superclass.
      </p>
-     <div>[[Image:PrF_UG_classes_superclass_drag_2.png|classes_superclass_drag_2]]</div>
+     <div>[[Image:PrF_UG_classes_superclass_drag_2.png|frame|none|
 </ol>
@@ Line 83: / Line 85: @@
 <div>[[Image:PrF_UG_classes_superclass_drag_3.png|frame|none|
-        Class Browser with Columnist selected]]</div>
+        Class Browser with slots missing]]</div>
 </div>

@@ Line 82: / Line 82: @@
 These were the slots it inherited from <b>Employee</b>.
-<div>[[Image:PrF_UG_classes_superclass_drag_3.png|classes_superclass_drag_3]]</div>
+<div>[[Image:PrF_UG_classes_superclass_drag_3.png|frame|none|
 </div>

@@ Line 57: / Line 57: @@
      See [[PrF_UG_classes_jump_to_superclass|Jumping to a Different Superclass]]
      for more information.)
-     Note that the [[PrF_UG_classes_template_slot_pane|Template Slots Pane]]
+     Note that the [[PrF_UG_classes_template_slot_pane|Template Slots pane]]
      for <b>Columnist</b> includes slots it inherits from <b>Employee</b>.
      </p>

@@ Line 5: / Line 5: @@
 You can move a class to a different superclass,
-using drag-and-drop in the
+using drag-and-drop
-[[PrF_UG_classes_class_browser|Class Browser]].
+in the [[PrF_UG_classes_class_browser|Class Browser]].
-This will remove the class from one superclass and make it a subclass of another superclass.
+This will remove the class from one superclass
 Note that when you replace the superclass of a class,
 the class will often lose and gain inherited slots.
@@ Line 19: / Line 20: @@
      Select the class you want to move.
      If the class has more than one superclass,
-     select the view of the class that appears under the superclass you want to replace.
+     select the view of the class that appears
      </p>
    <li><p>
-     Hold down the mouse button and drag the class on top of the new superclass.
+     Hold down the mouse button
      </p>
@@ Line 30: / Line 33: @@
      The subclass will no longer be under the original superclass,
      but will now be located under the new superclass.
-     Note that the slots of the moved class will automatically change to reflect the inheritance from its new superclass.
+     Note that the slots of the moved class will automatically change
      </p>
 </ol>
-You can also
+You can also [[PrF_UG_classes_add_superclass|add a superclass]]
-[[PrF_UG_classes_add_superclass|add a superclass]]
+by holding down the <b>Ctrl</b> (<b>Cmd</b>) key while you drag.
 === Example ===
@@ Line 50: / Line 51: @@
      [[PrF_UG_classes_class_browser|Class Browser]].
      Because <b>Columnist</b> has more than one superclass,
-     you must make sure to select the copy of <b>Columnist</b> that is under <b>Employee</b>. (When a class has more than one superclass,
+     you must make sure to select the copy of <b>Columnist</b>
      you can use the <b>Superclasses</b> pane to select the copy that you want.
-     See
+     See [[PrF_UG_classes_jump_to_superclass|Jumping to a Different Superclass]]
-    [[PrF_UG_classes_jump_to_superclass|Jumping to a Different Superclass]]
+     for more information.)
-     for more information.) Note that the
+    Note that the [[PrF_UG_classes_template_slot_pane|Template Slots Pane]]
      for <b>Columnist</b> includes slots it inherits from <b>Employee</b>.
      </p>
    <li><p>
-     Hold down the mouse button and drag <b>Columnist</b> on top of the new superclass <b>Person</b>.
+     Hold down the mouse button and drag <b>Columnist</b>
      </p>
    <li><p>
      Release the mouse button to drop the class.
-     <b>Person</b> is outlined and the
+     <b>Person</b> is outlined
-    [[PrF_UG_classes_class_browser|Class Browser]]
+    and the [[PrF_UG_classes_class_browser|Class Browser]]
      redisplays to show the new hierarchy.
-     The dragged class and all of its subclasses,
+     The dragged class and all of its subclasses, if any,
      will be moved from the original superclass to the new superclass.
      </p>
 </ol>