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As soon as a SLOG-2 file is selected in Main window, the Legend window
like the one shown in Figure will be displayed.
The Legend window contains mainly the 4 columns legend table. The
4 columns are labeled as Topo, Name, V and S as in Table
. Table
also lists out all defined mouse operations that are provided in each
column. The operations are left mouse clicking on the column title
icon and on the column cell as well as right mouse clicking in any
column cell.
Figure is the Color Chooser dialog
that will pop up when one of the icon buttons in column Topo is pressed.
The color editor provides 3 different ways of choosing a new color.
After selecting a new color from the dialog, the new color will be
used to update the icon button. The update won't be carried out in
the timeline canvas automatically, explicit screen redraw is needed.
Figure shows the popup dialog box either
when the title icon of column Name is pressed or when right mouse
button is clicked somewhere in the column. There are altogether 6
different sort orders. The first order in the list is called Creation
Order which refers to the category order is stored in slog2 file
when it is being created. The 4 alphabetical ordering has a hidden
sort order that is not mentioned in their names. This hidden order
is called Preview Order which puts the preview drawable category
before all the real drawable categories of the same topology. The
word Topo Order refers to topologyical order. Taking altogether,
``Case Sensitive Topo Order'' means first topological order, preview
order, then case sensitive alphabetical order. The various orderings
serve to facilitate the continuous selection of the category rows
in the legend table.
Figure shows a popup dialog box when
the title icon of column V (Visibililty) or S (Searchability) is pressed
or when right mouse button is clicked somewhere in either columns.
The rule of selection in the legend table follows the standard practice
of other graphical user interfaces as in the Table
.
Together with this standard selection rules, the operations provided
in checkbox operation menu allow easy enabling and disabling of visibility
as well as searchability checkboxes.
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NOTE: Any changes done in the Legend window that alters the appearance of drawables won't be automatically updated in the timeline canvas until the CanvasReDraw button in the Timeline window is pressed.