PrF UG inst showing subclass instances - Revision history

RichMorin at 01:16, November 14, 2008

2008-11-14T01:16:26Z

RichMorin: /* Showing Subclass Instances */

2008-10-29T22:23:22Z

‎Showing Subclass Instances

RichMorin at 22:14, October 29, 2008

2008-10-29T22:14:55Z

RichMorin: /* Showing Direct Instances Only */

2008-10-27T00:19:46Z

‎Showing Direct Instances Only

RichMorin: /* Showing Direct Instances Only */

2008-10-23T10:44:33Z

‎Showing Direct Instances Only

RichMorin at 10:43, October 23, 2008

2008-10-23T10:43:56Z

RichMorin at 00:11, October 23, 2008

2008-10-23T00:11:47Z

RichMorin at 07:25, October 16, 2008

2008-10-16T07:25:41Z

RichMorin: Automated import of articles

2008-10-09T08:59:12Z

Automated import of articles

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__NOTOC__
== Showing Subclass Instances ==

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

The
[[PrF_UG_inst_instance_menu|Instance Menu]]
at the top of the
[[PrF_UG_inst_instance_browser|Instance Browser]]
allows you to choose the level of instances - direct instances or subclass instances - you want to see for a selected class.
These choices are also available when you are choosing instances in a dialog box.

=== About Subclass Instances ===

There are two types of instances subordinate to a class:

<ul class='a'>
<li>
A direct instance is an instance that has been created directly under the class.


<li>
A subclass instance is any instance that is subordinate to the class.
Because of inheritance,
an instance of a class is also an instance of all of that class's superclasses.
Therefore,
an instance can be an instance of many classes of which it is not a direct instance.

</ul>

In the newspaper example,
the Manager class has three direct instances:
Jane,
Joe,
and Mary.
The Manager class also has a subclass,
Director,
which has a direct instance Tim.
Tim is a subclass instance of Manager.

=== Showing Subclass Instances ===

By default,
the Instance Window shows only the direct instances for a class.

<div>[[Image:PrF_UG_inst_show_direct_instances.png|instances_show_direct_instances]]</div>

You can change this,
using the Instance Menu.
To show all instances for a class,
including subclass instances:

<ol class='a'>
<li>
Select Show Subclass Instances from the
[[PrF_UG_inst_instance_menu|Instance Menu]]
at the top of the
[[PrF_UG_inst_instance_browser|Instance Browser]],
to the right of the instance buttons.
The display will change to show all instances subordinate to the class.
The class for which the instance was created is shown in parentheses after the instance name.
 <div>[[Image:PrF_UG_inst_show_subclass_instances.png|instances_show_subclass_instances]]</div>

</ol>

Notes:

<ol class='a'>
<li>
It is possible to attach an instance to more than one class (see
[[PrF_UG_inst_add_class_type|Adding a Class Type to an Instance]]),
so that the instance appears directly under two or more classes.
In this case,
the class name displayed after the instance will be the class where the instance was first created.


<li>
By definition,
abstract classes cannot have direct instances,
but they can have subclass instances.
This selection allows you to see all the subclass instances for an abstract class.

</ol>

=== Showing Direct Instances Only ===

If subclass instances are shown,
you can choose to show only direct instances.

<ol class='a'>
<li>
Click on the the
[[PrF_UG_inst_instance_menu|Instance Menu]]
at the top of the
[[PrF_UG_inst_instance_browser|Instance Browser]],
to the right of the instance buttons.
You will see that Show Subclass Instances is checked.

 <div>[[Image:PrF_UG_inst_hide_subclass_instances.png|instances_hide_subclass_instances]]</div>


<li>
Select Show Subclass Instances from the menu to deselect this setting and show only direct instances.

</ol>

</div>

@@ Line 2: / Line 2: @@
 == Showing Subclass Instances ==
-{{PrF_UG_TOC_inst}}<div id='prf_ug'>
+<noinclude>{{PrF_UG_TOC_inst}}<div id='prf_ug'></noinclude>
 The [[PrF_UG_inst_instance_menu|Instance menu]], at the top
@@ Line 99: / Line 99: @@
-</div>
+<noinclude></div></noinclude>

@@ Line 42: / Line 42: @@
         Instance window, "Jane" selected]]</div>
-You can change this, using the Instance Menu.
+You can change this, using the Instance menu.
 To show all instances for a class, including subclass instances:

@@ Line 4: / Line 4: @@
 {{PrF_UG_TOC_inst}}<div id='prf_ug'>
-The [[PrF_UG_inst_instance_menu|Instance Menu]] at the top
+The [[PrF_UG_inst_instance_menu|Instance menu]], at the top
 of the [[PrF_UG_inst_instance_browser|Instance Browser]]
 allows you to choose the level of instances -
@@ Line 37: / Line 37: @@
 === Showing Subclass Instances ===
-By default, the Instance Window shows only the direct instances for a class.
+By default, the Instance window shows only the direct instances for a class.
 <div>[[Image:PrF_UG_inst_show_direct_instances.png|frame|none|
-        Instance Window, "Jane" selected]]</div>
+        Instance window, "Jane" selected]]</div>
 You can change this, using the Instance Menu.
@@ Line 48: / Line 48: @@
    <li><p>
      Select <b>Show Subclass Instances</b>
-     from the [[PrF_UG_inst_instance_menu|Instance Menu]] at the top
+     from the [[PrF_UG_inst_instance_menu|Instance menu]] at the top
      of the [[PrF_UG_inst_instance_browser|Instance Browser]],
      to the right of the instance buttons.
@@ Line 56: / Line 56: @@
      </p>
      <div>[[Image:PrF_UG_inst_show_subclass_instances.png|frame|none|
-            Instance Window, showing subclass instances]]</div>
+            Instance window, showing subclass instances]]</div>
 </ol>

@@ Line 90: / Line 90: @@
      </p>
      <div>[[Image:PrF_UG_inst_hide_subclass_instances.png|frame|none|
-            Subclass Instances (checked)]]</div>
+            Show Subclass Instances checkbox (checked)]]</div>
    <li><p>

@@ Line 40: / Line 40: @@
 <div>[[Image:PrF_UG_inst_show_direct_instances.png|frame|none|
-        Instance Window]]</div>
+        Instance Window, "Jane" selected]]</div>
 You can change this, using the Instance Menu.

@@ Line 84: / Line 84: @@
 <ol class='a'>
    <li><p>
-     Click on the the [[PrF_UG_inst_instance_menu|Instance Menu]] at the top
+     Click on the the [[PrF_UG_inst_instance_menu|Instance menu]] at the top
      of the [[PrF_UG_inst_instance_browser|Instance Browser]],
      to the right of the instance buttons.

@@ Line 4: / Line 4: @@
 {{PrF_UG_TOC_inst}}<div id='prf_ug'>
-The
+The [[PrF_UG_inst_instance_menu|Instance Menu]] at the top
-[[PrF_UG_inst_instance_menu|Instance Menu]]
+of the [[PrF_UG_inst_instance_browser|Instance Browser]]
-at the top of the
+allows you to choose the level of instances -
-[[PrF_UG_inst_instance_browser|Instance Browser]]
+direct instances or subclass instances - you want to see for a selected class.
 These choices are also available when you are choosing instances in a dialog box.
@@ Line 24: / Line 23: @@
      Because of inheritance,
      an instance of a class is also an instance of all of that class's superclasses.
-     Therefore,
+     Therefore, an instance can be an instance of many classes
-    an instance can be an instance of many classes of which it is not a direct instance.
+    of which it is not a direct instance.
      </p>
 </ul>
@@ Line 31: / Line 30: @@
 In the newspaper example,
 the <b>Manager</b> class has three direct instances:
-Jane,
+Jane, Joe, and Mary.
-Joe,
+The <b>Manager</b> class also has a subclass, <b>Director</b>,
 which has a direct instance Tim.
 Tim is a <i>subclass instance</i> of <b>Manager</b>.
@@ Line 41: / Line 37: @@
 === Showing Subclass Instances ===
-By default,
+By default, the Instance Window shows only the direct instances for a class.
-<div>[[Image:PrF_UG_inst_show_direct_instances.png|instances_show_direct_instances]]</div>
+<div>[[Image:PrF_UG_inst_show_direct_instances.png|
-You can change this,
+You can change this, using the Instance Menu.
-using the Instance Menu.
+To show all instances for a class, including subclass instances:
 <ol class='a'>
    <li><p>
-     Select <b>Show Subclass Instances</b> from the
+     Select <b>Show Subclass Instances</b>
-    [[PrF_UG_inst_instance_menu|Instance Menu]]
+    from the [[PrF_UG_inst_instance_menu|Instance Menu]] at the top
-    at the top of the
+    of the [[PrF_UG_inst_instance_browser|Instance Browser]],
      to the right of the instance buttons.
      The display will change to show all instances subordinate to the class.
-     The class for which the instance was created is shown in parentheses after the instance name.
+     The class for which the instance was created
-    </p><p> <div>[[Image:PrF_UG_inst_show_subclass_instances.png|instances_show_subclass_instances]]</div>
+    is shown in parentheses after the instance name.
      </p>
 </ol>
@@ Line 68: / Line 63: @@
 <ol class='a'>
    <li><p>
-     It is possible to attach an instance to more than one class (see
+     It is possible to attach an instance to more than one class
-    [[PrF_UG_inst_add_class_type|Adding a Class Type to an Instance]]),
+    (see [[PrF_UG_inst_add_class_type|Adding a Class Type to an Instance]]),
      so that the instance appears directly under two or more classes.
-     In this case,
+     In this case, the class name displayed after the instance
-    the class name displayed after the instance will be the class where the instance was first created.
+    will be the class where the instance was first created.
      </p>
    <li><p>
-     By definition,
+     By definition, abstract classes cannot have direct instances,
      but they <i>can</i> have subclass instances.
      This selection allows you to see all the subclass instances for an abstract class.
@@ Line 90: / Line 84: @@
 <ol class='a'>
    <li><p>
-     Click on the the
+     Click on the the [[PrF_UG_inst_instance_menu|Instance Menu]] at the top
-    [[PrF_UG_inst_instance_menu|Instance Menu]]
+    of the [[PrF_UG_inst_instance_browser|Instance Browser]],
      to the right of the instance buttons.
      You will see that <b>Show Subclass Instances</b> is checked.
      </p>
    <li><p>
-     Select <b>Show Subclass Instances</b> from the menu to deselect this setting and show only direct instances.
+     Select <b>Show Subclass Instances</b> from the menu
      </p>
 </ol>