Visualization Tools User's Guide


Using the Widget Scope

To open a Widget Scope window, select Open Widget Scope from the Visualization menu of the System Transcript.

To reveal objects behind the scenes, you click the Probe button, and then click the area of the screen in which you are interested.

For example, to find out what's behind the scenes of a hierarchy browser, do the following:

  1. In the System Transcript, select Browse Hierarchy... from the Tools menu.
  2. In the displayed prompter, type Object and click OK.
  3. In the System Transcript, select Open Widget Scope from the Visualization menu.
  4. In the Widget Scope, click the Probe button. The cursor turns into a cross-hair.
  5. Click in the center of the top-left pane of the hierarchy browser.

A list of objects then appears in the scrolled window of the Widget Scope. Objects are listed one per line, with each line containing a tag, such as Hit or Parent. The tag is followed by an object identifier which is the result of a printString message sent to the object. The tags provide an indication of why the object is listed. For instance, Hit indicates that the object is the one that was clicked with the probe; Parent indicates that the object is a parent of a preceding object in the list.

As well, each widget object can have a number of objects displayed in indented lines immediately below it. These are objects that hold callbacks on the widget. The indented line contains the name of the callback, and an object identifier.


[ Top of Page | Previous Page | Next Page | Table of Contents ]