Opened 16 years ago
Closed 16 years ago
#715 closed defect (fixed)
Ajax viewer pan/zoom executes two spatial queries on IE7
| Reported by: | trevorwekel | Owned by: | trevorwekel |
|---|---|---|---|
| Priority: | medium | Milestone: | |
| Component: | AJAX Viewer | Version: | 2.0.1 |
| Severity: | minor | Keywords: | |
| Cc: | External ID: | 1097918 |
Description
Using IE6 or IE7, the Ajax viewer executes two GETDYNAMICMAPOVERLAY requests for each pan/zoom. This is readily evident using Fiddler. Since two overlay requests are generated, all of the Fdo spatial queries are executed twice for every layer. This reduces MapGuide performance by a factor of two.
The double request is necessary to support PNG alpha transparency under IE6. It is not required for IE7 since alpha transparency is natively supported by IE7.
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The fix has already been made in trunk as part of the RFC 38 selection overlay work. Since the changes were made to trunk in a single submission, I have also backported the RFC 38 selection overlay to 2.0.x.
Thank you Chris! Happy selecting!