needsRendering() and GetRenderList()

[JavaWiz]

It seems that the core code calls GetRenderList() regardless of the result of neesRendering() as seen in below log snippet. Is this the expected behavior, or am I doing something wrong?

Code:

2008-05-21 [B][COLOR=red]16:43:24.046[/COLOR][/B] INFO [1] SearchWizX2: [B][COLOR=red]needsRendering()-[/COLOR][/B] False
2008-05-21 [B][COLOR=red]16:43:24.046[/COLOR][/B] VERBOSE [1] SearchWizX2: [B][COLOR=red]GetRenderList()-[/COLOR][/B] BEGIN
2008-05-21 16:43:24.046 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms SystemDateTime
2008-05-21 16:43:24.046 VERBOSE [1] WizUiList: GetRenderList()- placementName = FilterName  currentIndex = 7  detailsViewVisibleIndex = 7
2008-05-21 16:43:24.046 VERBOSE [1] WizUiList: GetRenderList()- LIST: Using cached image- FilterNameListSelectedInactive[7]
2008-05-21 16:43:24.046 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms FilterName
2008-05-21 16:43:24.046 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms SearchText
2008-05-21 16:43:24.046 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms MenuButtons
2008-05-21 16:43:24.046 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms ProgramsCounter
2008-05-21 16:43:24.093 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:46ms Programs
2008-05-21 16:43:24.093 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms ProgramTimesCounter
2008-05-21 16:43:24.156 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:62ms ProgramTimes
2008-05-21 16:43:24.156 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms ProgramInformation
2008-05-21 16:43:24.156 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms SMSEyeCatcher
2008-05-21 16:43:24.156 VERBOSE [1] SearchWizX2: GetRenderList()- total elapsed: 00m:00s:109ms
2008-05-21 [B][COLOR=red]16:43:24.203[/COLOR][/B] INFO [1] SearchWizX2: [B][COLOR=red]needsRendering()-[/COLOR][/B] False
2008-05-21 [B][COLOR=red]16:43:24.203[/COLOR][/B] VERBOSE [1] SearchWizX2: [B][COLOR=red]GetRenderList()-[/COLOR][/B] BEGIN
2008-05-21 16:43:24.203 VERBOSE [1] SearchWizX2: GetRenderList()- elapsed: 00m:00s:00ms SystemDateTime

[sub]

...but does it do call GetRenderList() every time it calls needsRendering()? ie, if SearchWiz is active, is it called over and over, continuously, a dozen or more times a second?

There are some situations where it can ignore the needsRendering() result if it knows it needs to update the screen, like the screen transitions etc, or forced screen repaints - these should be fairly short lived though.

[JavaWiz]

...but does it do call GetRenderList() every time it calls needsRendering()? ie, if SearchWiz is active, is it called over and over, continuously, a dozen or more times a second?

No, there are time that needsRendering() returns false, and GetRenderList() is not called.

There are some situations where it can ignore the needsRendering() result if it knows it needs to update the screen, like the screen transitions etc, or forced screen repaints - these should be fairly short lived though.

Ok, this must be what's going on. In approx. 1 minute:

• needsRendering() called 719 times
  
• needsRendering() returned True 54 times
  
• needsRendering() returned False 665 times
  
• GetRenderList() was called 71 times.
  

[sub]

Yeah that sounds ok to me. I'm sure its just these forced renders I mentioned above.