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# haxe-ui
  • b
    @User - ok, fixed in latest haxeui-heaps
  • b
    Thanks! I knew I couldn't have broken the most basic container lol
  • b
    Works well for me
  • f
    Hi, I have a problem to understand the concept of the 
    DataSource<T>
    and the 
    IItemTransformer<T>
    - I was thinking that the 
    DataSource<T>
    is the underlying container of some 
    T
    s - an 
    Array<T>
    for example and that the 
    IItemTransformer<T>
    transforms a 
    T
    to something that 
    TableView
    can display. At least it worked for me that way when I used typed my underlying data as 
    Array<Dynamic>
    and provided an 
    IItemTransformer<T>
    which converted the 
    Dynamic
    to a display type 
    T
    . Now I wanted to get rid of 
    Dynamic
    and constructed the 
    DataSource<T>
    as a specific 
    ArrayDataSource<T>
    (same underlying Data as before) with a 
    IItemTransformer<D>
    which converts the 
    T
    to a displayable type 
    D
    (I used the same transformer as before) - now I get errors from the compiler that 
    D
    should be 
    T
    which seems to be correct because I just replaced the less specific 
    Dynamic
    with a 
    T
    . Shouldn't the definition for for 
    DataSource
    be 
    DataSource<T,D>
    with an 
    IItemTransformer<D>
    ? - I am confused
  • b
    ill have to refresh my memory about the transformation stuff - if memory serves its super old and might not be needed
  • b
    you should just be able to do 
    var myDS = new ArrayDataSource<MyClass>()
    and never touch the transform stuff
  • b
    so yeah, @User ,given this item renderer:
  • b
    Copy code
    xml
    <listview id="myList" width="200" height="200">
        <item-renderer width="100%" layoutName="horizontal">
            <checkbox id="someBool" verticalAlign="center" />
            <label id="someString" width="100%" verticalAlign="center" />
            <number-stepper id="someInt" />
        </item-renderer>
    </listview>
  • b
    and this data class:
  • b
    Copy code
    haxe
class SomeDataItem {
    public var someString:String;
    public var someBool:Bool;
    public var someInt:Int;
    
    public function new(s:String, b:Bool, i:Int) {
        someString = s;
        someBool = b;
        someInt = i;
    }
}
  • b
    you can just do:
  • b
    Copy code
    haxe
        var ds = new ArrayDataSource<SomeDataItem>();
        ds.add(new SomeDataItem("Item 1", true, 101));
        ds.add(new SomeDataItem("Item 2", false, 202));
        ds.add(new SomeDataItem("Item 3", true, 303));
        ds.add(new SomeDataItem("Item 4", true, 404));
        ds.add(new SomeDataItem("Item 5", false, 505));
        ds.add(new SomeDataItem("Item 6", true, 606));
        ds.add(new SomeDataItem("Item 7", true, 707));
        ds.add(new SomeDataItem("Item 8", false, 808));
        ds.add(new SomeDataItem("Item 9", true, 909));
        myList.dataSource  = ds;
  • b
    you dont need to touch the item transformer stuff, i think ill review that and see what its all about, but seems junky
  • b
    as a bonus btw, if you use 
    SomeDataItem implements IDataItem
    then you can access properties in the 
    SomeDataItem
    and it will automatically update the data source (and any associated view)
  • b
    ds.get(3).someString = "bob";
  • g
    Hi! Just starting with HaxeUI. Tried to compile haxeui-hxwidgets from the hello world example and got this error after the compilation of several C++ files:
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    ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Error: Build failed
    I'm on a MacBook Air M1. Thanks!
  • b
    are you using latest haxeui-core / haxeui-hxwidgets / hxWidgets (git version) and also, iirc wx on mac is woefully out of date, so you might need to recompile it from source - instructions can be found on the hxWidgets readme (i would consider using git version of wx also)
  • g
    Awesome, Ian! I'll try your suggestions tonight. Thanks a lot!
  • g
    Hi again, @User. I've recompiled hxWidgets from the source and haxeui-core and haxeui-hxwidgets had already been installed using haxelib and even though the error persists.
  • b
    Sorry, i probably wasnt clear / specific enough. What i meant was install the haxeui type libraries _from git_:
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    haxelib git haxeui-core https://github.com/haxeui/haxeui-core
haxelib git haxeui-hxwidgets https://github.com/haxeui/haxeui-hxwidgets
haxelib git hxWidgets https://github.com/haxeui/hxWidgets
    Then build wxWidgets (wx, not hx) from source on your mac, instructions can be found here: https://github.com/haxeui/hxWidgets#building-wxwidgets-from-source-linux--osx (I would consider using the git version of wxWidgets from https://github.com/wxWidgets/wxWidgets) I would also try updating hxcpp (
    haxelib update hxcpp
    ), or, like the other deps install git version (note if you do install hxcpp git you will need to rebuild the hxcpp tools - instructions can be found here https://github.com/HaxeFoundation/hxcpp#building-the-tools)
  • b
    also can you paste the contents of the 
    hxwidgets.hxml
  • b
    maybe you need to tell hxcpp to use x64 (i thought it was the default)
  • b
    does 
    -DHXCPP_M64
    do anything?
  • g
    Awesome! Thanks a lot for the explanation. I'll try this later today and I'll let you know.
  • f
    thanks - but what when I want to do this:
  • f
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    class SomeDataItem implements  IDataItem {
    
    public var someString(get, never):String;
        function get_someString() {
            return "calculated: " + Std.string(_someFloat);
        }
    public var someBool:Bool;
    public var someInt:Int;
    var _someFloat: Float;

    public function new(d:Float, b:Bool, i:Int) {
        _someFloat = d;
        someBool = b;
        someInt = i;
    }
}
  • b
    should work the same, no?
  • f
    I get this
  • b
    hmmmm
  • b
    that feels like a bug
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