Deselect and tooltips very slow in MapGuide

[trevorwekel]

Create a map with a single vector layer in MapGuide from an Oracle database. The database should contain more than 50,000 features.

Select a feature. Selection is highlighted in 1-2 seconds. Deselect by hitting white space. The MapGuide Server process pins the CPU for 15 seconds or more depending on the dataset size and eventually deselects the feature.

This will also occur during hovering if a tooltip is defined for the layer.

[trevorwekel]

Submitted to 2.0.x stream under ​http://trac.osgeo.org/mapguide/changeset/3153

Submitted to MgDev under ​http://trac.osgeo.org/mapguide/changeset/3154

[trevorwekel]

The submitted fix is incomplete when used with some coordinate systems. For example, attempting to select outside of the bounds of an LL84 map will not work as expected.

[trevorwekel]

The following modifications have been make to query algorithm:

• Only perform the query if a selection area can be calculated. If the input geometry is a line, a centroid cannot be calculated. This typically occurs outside of coordinate system bounds.
• Intersect the selection area with the map extent and only process the query if the intersection exists.

Submitted to 2.0.x stream under ​http://trac.osgeo.org/mapguide/changeset/3325

[trevorwekel]

Added query options to !RSMgFeatureReader instantiation. In some cases, the stylizer will use a multi-pass algorithm so the query options are required.

Submitted to 2.0.x stream under ​http://trac.osgeo.org/mapguide/changeset/3351

[trevorwekel]

Submitted to trunk under ​http://trac.osgeo.org/mapguide/changeset/3386