LAMW and Custom Drawing jListView Items
lazarus / 43-Android

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Robert Gilland · 2019-04-09 13:45

I have been looking without any success for something that will allow
me to custom draw a listview item.

Or maybe another Component I could use to do this?

An event like:

jListView.OnCustomDrawListViewItem( index : Integer; canvas :TCanvas 
).

Then I could place all my elements where I need them to be like:

Canvas.DrawBitMap( 0,0, 10, 10, MyRetrievedBitMap )

Canvas.DrawText( 10,0,0,0, "Some Text')


etc

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howardpc · 2019-04-09 14:11

I'm not familiar with jListView.
However, the bog-standard LCL TListView offers three 'custom' events,
you can choose which one might meet your needs (they have differing
parameter signatures):
OnCustomDrawOnCustomDrawItemOnCustomDrawSubItem

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Robert Gilland · 2019-04-09 21:53

jListView is part of the LAMW Library, built for mobile Apps on
Android, which have to deal with rotating screens.

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jmpessoa · 2019-04-09 21:59

Hi, Robert.

What [jListView] text layout you nedd?

some hint:    left(center|centerbelow)right

the tags '(' and '|' will layout your text!

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Robert Gilland · 2019-04-09 22:17

Well the current jListview requirement is a simple <Image>.png| Long
Description Text

But I foresee further jListViews will need maybe jGridView as they
deal with Product data and therefore maybe multiple objects arranged
in one List Item.

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Robert Gilland · 2019-04-09 23:41

Also, what sets the height of a jListItem of jListVIew? No setting I
choose seems to do anything.

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jmpessoa · 2019-04-10 04:58

Quote what sets the height of a jListItem of jListVIew...?

You can try properties:  "ItemPaddingBottom" and "ItemPaddingTop"