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Create a huge columns for nattable, still working paint function. [message #1455375]

Wed, 29 October 2014 09:54

neal zhang

Messages: 45
Registered: July 2012

Member

Hi dirk.
I create a create a nattable with a huge columns.when i execute the nattable, it still run in painterLayer in NatLayerPainter.java again and again. like a deadloop, when i set a small column count, it is right. do you know where control this function? can you give me some advises for that.

reproduce:
run attachment file _5016_AutomaticHugeDataSpanningExample
add a log in painterLayer function in NatLayerPainter.java,
we can find , it will run this function again and again. like a dead loop.

can you help me check it? thank you very much.

Attachment: _5016_AutomaticHugeDataSpanningExample.java
(Size: 9.19KB, Downloaded 234 times)
Attachment: HugeReflectiveColumnPropertyAccessor.java
(Size: 1.22KB, Downloaded 118 times)
Attachment: HugeData.java
(Size: 1.24KB, Downloaded 188 times)

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Re: Create a huge columns for nattable, still working paint function. [message #1456284 is a reply to message #1455375]

Thu, 30 October 2014 07:44

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

I don't have an idea on that. The paint function is called on painting. So it seems the paint operation is executed that often, Might be caused by your usage of NatTable.

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Re: Create a huge columns for nattable, still working paint function. [message #1457126 is a reply to message #1456284]

Fri, 31 October 2014 02:50

neal zhang

Messages: 45
Registered: July 2012

Member

Thank you for your reply, if modify the columnCount to 1000(means just has 1000 columns, the attachment is 5000 columns), it works, it will not still execute paint function. is there some places add a event for the paint function?
i don't have any idea for this problem, can you help me and check it again?
thank you.

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Re: Create a huge columns for nattable, still working paint function. [message #1457239 is a reply to message #1457126]

Fri, 31 October 2014 05:47

neal zhang

Messages: 45
Registered: July 2012

Member

or remove spanningDataLayer.setColumnPercentageSizing(true)
it also works. is there some codes control that?

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Re: Create a huge columns for nattable, still working paint function. [message #1457317 is a reply to message #1457239]

Fri, 31 October 2014 07:44

Dirk Fauth

Messages: 2902
Registered: July 2012

Senior Member

might be related to how spanning works in NatTable since every cell is rendered once, and a spanned cell in your case consists of several hundred cells.

Maybe you are trying to implement a pivot table, I don't understand what you are trying to do. But personally I think you are running into the wrong direction. Maybe instead of trying to rape the existing code you should try to implement a custom layer or a custom functionality to do what you are trying to achieve, but surely rendering 1000 columns in 500 pixels will never work in a clean way since there is so much that can go wrong or cause strange behavior in the current architecture.

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