[Qt-qml] Performance issue with Repeater

[Sohail Somani]

Oh duh, thanks :)

On 10-09-19 6:30 PM, Juha Turunen wrote:
> The ListView element inherits from Flickable so you can use all the
> same properties as with Flickable (boundsBehavior in this case).
>
> Juha
>
> On Mon, Sep 20, 2010 at 12:57 AM, Sohail Somani<sohail at taggedtype.net>  wrote:
>> That works nicely, thanks!
>>
>> Is there a way to prevent the view from going beyond the bounds like the
>> Flickable type?
>>
>> On 10-09-19 5:37 PM, Juha Turunen wrote:
>>> How about using a ListView instead of Flickable? This way everything
>>> doesn't have to be instantiated at once, but instead ListView smartly
>>> creates (and disposes) instances of the delegate component as the user
>>> scrolls the view.
>>>
>>> Juha
>>>
>>> On Mon, Sep 20, 2010 at 12:19 AM, Sohail Somani<sohail at taggedtype.net>    wrote:
>>>> Hi,
>>>>
>>>> I have a need to create a bunch of rectangles with different heights in a
>>>> single column.
>>>>
>>>> Essentially it's like a scrollable bar chart but with a large number of
>>>> entries.
>>>>
>>>> The self-contained code I'm using to create this bar chart is attached.
>>>>
>>>> The problem seems to be that when I get to a normal number of elements
>>>> (approx 3000), the initial display performance is incredibly slow. I think I
>>>> understand why: there are a lot of rectangles that need to be created.
>>>>
>>>> One option I thought of is to remove all the rectangles that display units
>>>> less than a certain amount but this roughly amounts to having less elements
>>>> and loses precision. Worst case, I can expect about 60,000 although it is
>>>> quite literally impossible for any particular user. In my testing, 3000 is
>>>> about normal so I'd like to be able to handle at most 3-4x that amount if
>>>> possible.
>>>>
>>>> So any techniques you can recommend for faster display for the attached?
>>>> Delayed loading perhaps?
>>>>
>>>> Thanks in advance!
>>>>
>>>> Sohail
>>>>
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>>>>
>>>>
>>
>>
>> --
>> Sohail Somani
>> --
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>>
>>
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-- 
Sohail Somani
--
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iTweet: http://twitter.com/somanisoftware
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