Bug 210184

Description Peter Centgraf 2007-11-17 17:47:54 EST

The current implementation of the CDateTime date picker uses a grid of individual buttons and labels to render the calendar.  This approach consumes many SWT widget handles, which can cause serious scalability problems when running on Win32.

Windows XP has a limit of 10k window handles per application.  Each date picker consumes on the order of a hundred of these handles, which puts the upper limit on the number of CDateTime instances at near 100.  This limit can be easily reached in practice with Form-based editors in RCP.

A lightweight approach to drawing the calendar could provide an equivalent user experience with an order of magnitude reduction in handles and a corresponding increase in the total number of instances supported.

P.S. This issue was first raised by a post on the newsgroup, but I have since lost track of who reported it.