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taylorren
@taylorren
Hello
In a Fltter app's Stateful widget, where is the right place to put a call to fetch remote API?
blehn
@blehn
@abarth shrinkWrap: true on the GridView seems to fix my issue. Is Wrap a better solution?
Adam Barth
@abarth
@blehn depends if you want the children to line up vertically as well as horizontally
if you do, grid is a good choice
blehn
@blehn
yeah, I do
Adam Barth
@abarth
if you want them to line up horizontally but not necessarily vertically, then wrap is a good choice
then I'd go with Grid
GridView
blehn
@blehn
k thanks... and is shrinkWrap the right property to use to render a GridView within a ScrollView?
Adam Barth
@abarth
yep
taylorren
@taylorren
Hi there
A quick question, I am looking at the Flutter example and noticed this section: 
child: new RichText(
            text: new TextSpan(
              children: <TextSpan>[
                new TextSpan(
                  style: aboutTextStyle,
                  text: "Flutter is an early-stage, open-source project to help "
                  "developers build high-performance, high-fidelity, mobile "
                  "apps for iOS and Android from a single codebase. This "
                  "gallery is a preview of Flutter's many widgets, behaviors, "
                  "animations, layouts, and more. Learn more about Flutter at "
                ),
                new LinkTextSpan(
                  style: linkStyle,
                  url: 'https://flutter.io'
                ),
                new TextSpan(
                  style: aboutTextStyle,
                  text: ".\n\nTo see the source code for this app, please visit the "
                ),
                new LinkTextSpan(
                  style: linkStyle,
                  url: 'https://goo.gl/iv1p4G',
                  text: 'flutter github repo'
                ),
                new TextSpan(
                  style: aboutTextStyle,
                  text: "."
                )
              ]
            )
          )
I tried to copy that code segment to my program but was prompted with this error:
The constructor returns type 'dynamic' that isn't of expected type 'TextSpan'
What is going wrong here?
Marian
@cortexdesign
@jacoplane sounds good :)
Günter Zöchbauer
@zoechi
never heard of a constructor returning dynamic :D
taylorren
@taylorren
@zoechi I know it is funny. But that segment of code runs fine in the demo app
Am I missing any import?
OIC... My bad. Solved.
Marian
@cortexdesign
@taylorren is LinkTextSpan inherit from TextSpan?
taylorren
@taylorren
@cortexdesign Yes, I am missing this class declaration.
Marian
@cortexdesign
;)
taylorren
@taylorren
but the output APK is not signed.
And thus can't be installed to my emulator.
https://flutter.io/android-release/
I am running under Windows
Eric Seidel
@eseidelGoogle
LinkTextSpan is just a class local to that file: https://github.com/flutter/flutter/blob/83fce211a319d5c0e8f1592ca16ecd8b32e10d64/examples/flutter_gallery/lib/gallery/drawer.dart#L12
Brian Blanchard
@briblanch
Is there a best practice on how to scroll to an item in a list or grid view? I see the ScrollController property on the list and grid view and how you could scroll to a provided offset. Just a little lost on how to map the offset given to the scroll controller to a child in the list.
Ian Hickson
@Hixie
if the child is visible at all, you can use ensureVisible
if it's not visible, and the items are fixed height, you can compute its height and animateTo that
if it's not visible, and the items are varying height, then it's hard to predict what it's offset will be
and we don't have a good solution for that yet
Brian Blanchard
@briblanch
Great thanks @Hixie
blehn
@blehn
Are there any more documented examples like this one, of creating nested functions that take certain inputs and build the widget: 
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    //...

    Column buildButtonColumn(IconData icon, String label) {
      Color color = Theme.of(context).primaryColor;

      return new Column(
        mainAxisSize: MainAxisSize.min,
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          new Icon(icon, color: color),
          new Container(
            margin: const EdgeInsets.only(top: 8.0),
            child: new Text(
              label,
              style: new TextStyle(
                fontSize: 12.0,
                fontWeight: FontWeight.w400,
                color: color,

  //...
}
with images and other types of values , for example
Eric Seidel
@eseidelGoogle
That's a very common pattern :)
Well, the alternative is to wrap it in a MyColumn StatelessWidget
blehn
@blehn
yeah i thought so but was having trouble finding more examples in the docs
that would mean making a custom MyColumn widget?
(or "ButtonColumn")
Eric Seidel
@eseidelGoogle
e.g. https://github.com/flutter/flutter/blob/master/examples/stocks/lib/stock_home.dart#L116
@blehn intellij even has a quick-action (option-enter) for wrapping something in a widget iirc
blehn
@blehn
ok I'll take a look, thanks
speaking of intellij, sometimes tab completion inserts a snippet while simultaneously overwriting a bunch of text below... what's up with that?
Luke
@lukef
can you mask a flutter widget with a shape?
Devon Carew
@devoncarew
@blehn, In IntelliJ, completing with enter will insert, completing with tab will overwrite
so, two different insert modes...