FlowListView, chance of scrolling x and y so it can cope with many columns? about dltoolkit.forms.controls

[daniel-luberda]

@Yumeryu Thanks. You can set FlowAutoColumnCount to true and FlowColumnDefaultMinimumWidth property. Column count will be calculated automatically. Does it solve your issue?

[Yumeryu]

Thanks for your quick reply.

I have tried those settings, they are recalculating all the columns and still fit them in one page. So this will lose the columns mapping.

What I'm trying to achieve is, for example, I have 12 columns for each month, and I want to list each row with all 12 columns, and if it doesn't fit in one page, I would expect the FlowListView to expand over the page, so I can scroll from left to right to see all columns, and scroll from top to bottom to see all rows.

I'm not sure if this is achievable at the moment, and how complicated to mod code to achieve this?

Thanks in advance.

[daniel-luberda]

@Yumeryu I think it's possible but I'll need to modify source code a bit.

https://github.com/daniel-luberda/DLToolkit.Forms.Controls/blob/master/FlowListView/DLToolkit.Forms.Controls.FlowListView/FlowListViewInternalCell.cs#L43

Basically, this:

View = rootLayout;

Needs to be changed to something like:

View = new ScrollView() { Orientation=Horizontal, View = rootLayout; };

I'll need to introduce some property for that as for normal use cases using ScrollView could be not good for performance reasons.

I think I can add it to FlowListView soon.

[Yumeryu]

Again, thanks a lot for the quick reply.

I just gave that a quick try.
Replaced with this :
View = new ScrollView
{
Content = rootLayout
};

However, the layout of the view hasn't changed, the performance did drop as you mentioned. I tried both with settings FlowAutoColumnCount to true and FlowColumnDefaultMinimumWidth, and without.

[daniel-luberda]

It's definitely possible, but I'll need to check if all the other LayoutOptions are correct, etc. And you also need to set correct ScrollView orientation. I can implement it, but definitely not today.

[Yumeryu]

Sure, thanks a lot.

In the mean time, I will try to see if i can find how these LayoutOptions and ScrollView works. Any pointers will be greatly appreciated.

[daniel-luberda]

I think it can be because of using AbsoluteLayout (for performance reasons). I think for such case StackLayout + ScrollView would be a better solution. So it means it's better and easier to make a new internal cell implementation eg. FlowListViewScrolledInternalCell and basically all those calculations are not needed, just simple add / remove from StackLayout

[daniel-luberda]

@Yumeryu Did you have any success implementing this?

[reynzmonaresgithub]

..hello @daniel-luberda , how can I set FlowAutoColumnCount in FlowListView? It seems that this property is not available currently. thanks