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Defining Images Used in Hierarchical Objects

An HTML Hierarchy bitmap is a top-level object that defines the images used by hierarchical objects such as a Tree applet when it is rendered in the user interface. For example, the folders, the plus symbol, and the minus symbol in Figure 123 are icons defined in the Hierarchy Bitmap object. An example of a Tree Applet in the repository is an Account Tree Applet. An example of an hierarchical list applet is Quote Item List Applet.

Figure 123.  Tree Portion of the Account Tree Applet

Hierarchy Bitmap objects have the following important properties:

• Name. The name for the HTML Hierarchy Bitmap object.
• Collapse Bitmap, Collapse Elbow Bitmap, Collapse Tee Bitmap. Icons to be used to collapse a node.
• Expand Bitmap, Expand Elbow Bitmap, Expand Tee Bitmap. Icons to be used to expand a node.
• Elbow Bitmap, Tee Bitmap. Icons to be used for creating an elbow (L) or a Tee (T).
• Bar Bitmap. Icon for creating a vertical line.
• Space Bitmap. Icon for indents.
• Open Bitmap. Icon to be used for a node that is an expanded state.
• Close Bitmap. Icon to be used for a node that is in a collapsed state.
• Leaf Bitmap. Icon for a leaf node.
• Arrow Down Bitmap, Arrow Up Bitmap. Icons for scrolling a tree up or down.

The bitmap objects for these attributes used by the standard tree applets are defined in the Bitmap Category HTML Hierarchy Icons.

The Tree and List objects in tools have an attribute called HTML Hierarchy Bitmap. This attribute can be set to the name of any HTML Hierarchy Bitmap object. This allows the various instances of the Tree object and List object to share these bitmaps.

The Tree Node object has the attributes HTML Open Bitmap and HTML Close Bitmap. These attributes are optional. If you do not specify, the Open Bitmap and Close Bitmap attributes of the HTML Hierarchy Bitmap object will be used. If the attributes are specified, then for that node the specified attributes will be used. This is useful if you want different nodes to have different icons.

For more information about tree applets, see About Tree Applets.