Pitney Bowes MapXtreme - Manual (Page 425)

Chapter 23: Workspace Manager
Layer Control
MapXtreme v7.1 432 Developer Guide
You can also select Show Nodes, Show Centroids, and Show Line Direction to display these
items on the map layer. Nodes are the points that define segments of a line or multiline or polygon. A
centroid is the center of a map object. Line direction is the direction in which the line was drawn (this
is helpful on street layers to indicate the proper addressing sequence). Display these elements when
you wish to edit map features. The Editable checkbox is located on the Options tab.
Options
The Options tab check boxes facilitate editing and customizing a feature layer:
• Selectable–When the Selectable check box is selected, objects in the layer can be selected
using either the Tool menu commands or the Selecting tools in the toolbar. Clear the Selectable
check box for any layer you do not want to select from.
• Editable–Select the check box to make the layer editable.
• Drawing Tools can add features –Select this check box if you are preparing this workspace for
use in an application that provides drawing tools, and you want the drawing tools to create new
features in this layer.
• Show InfoTips–Select the Show InfoTips check box to display InfoTips when you hover over
map objects in the selected layer. The InfoTip text consists of the result of the expression in the
InfoTip Expression field. For example, if the expression is a column in your table, the InfoTips
comprise the values from that column. If the expression is a calculation that uses column
information in your table, the InfoTips comprise the results of that calculation.
• Snap to Nodes – Select to turn the Snap To Node feature on or off for a specific layer, select the
layer in the layer tree, then select or clear the Snap To Node check box.
• InfoTip Expression – Control the InfoTip you want displayed in the InfoTip for the layer. You can
display more than the first column in your table. See
Chapter 10: Creating Expressions .
Settings in the Options tab are unaffected by the layer’s visibility. You will be able to see the Options
tab settings regardless of whether the layer is currently visible.
Extents
For a layer, the Extents tab shows the extents of the selected layer. Click the View Entire Layer
button to see all of the layer, or click View Default Area to see the default view of the layer.
Information
The Information tab provides information about the selected layer. It gives the name of the table and
its path, the type of table, e.g., MapInfo table, and its coordinate system.
Theme Layer Settings
When you click on a theme layer, the following tabs are available in Layer Control.
Visibility
When a theme layer is selected, the Visibility tab options control the display of the selected theme.
Select the Visible check box to display the theme layer; clear the check box to turn off the theme
display.