text
stringlengths 1
372
|
|---|
),
|
);
|
}
|
}
|
<code_end>
|
by setting softWrap to true, text lines fill the column width before
|
wrapping at a word boundary.
|
<topic_end>
|
<topic_start>
|
update the app to display the text section
|
add a new TextSection widget as a child after the ButtonSection.
|
when adding the TextSection widget, set its description property to
|
the text of the location description.
|
<topic_end>
|
<topic_start>
|
add the image section
|
in this section, add the image file to complete your layout.
|
<topic_end>
|
<topic_start>
|
configure your app to use supplied images
|
to configure your app to reference images, modify its pubspec.yaml file.
|
create an images directory at the top of the project.
|
download the lake.jpg image and add it to the new images directory.
|
info
|
you can’t use wget to save this binary file.
|
you can download the image from unsplash
|
under the unsplash license. the small size comes in at 94.4 kB.
|
to include images, add an assets tag to the pubspec.yaml file
|
at the root directory of your app.
|
when you add assets, it serves as the set of pointers to the images
|
available to your code.
|
lightbulb tip
|
text in the pubspec.yaml respects whitespace and text case.
|
write the changes to the file as given in the previous example.
|
this change might require you to restart the running program to
|
display the image.
|
<topic_end>
|
<topic_start>
|
create the ImageSection widget
|
define the following ImageSection widget after the other declarations.
|
<code_start>
|
class ImageSection extends StatelessWidget {
|
const ImageSection({super.key, required this.image});
|
final string image;
|
@override
|
widget build(BuildContext context) {
|
return image.asset(
|
image,
|
width: 600,
|
height: 240,
|
fit: BoxFit.cover,
|
);
|
}
|
}
|
<code_end>
|
the BoxFit.cover value tells flutter to display the image with
|
two constraints. first, display the image as small as possible.
|
second, cover all the space that the layout allotted, called the render box.
|
<topic_end>
|
<topic_start>
|
update the app to display the image section
|
add an ImageSection widget as the first child in the children list.
|
set the image property to the path of the image you added in
|
configure your app to use supplied images.
|
<topic_end>
|
<topic_start>
|
congratulations
|
that’s it! when you hot reload the app, your app should look like this.
|
<topic_end>
|
<topic_start>
|
resources
|
you can access the resources used in this tutorial from these locations:
|
dart code: main.dart
|
image: ch-photo
|
pubspec: pubspec.yaml
|
<topic_end>
|
<topic_start>
|
next steps
|
to add interactivity to this layout, follow the
|
interactivity tutorial.
|
<topic_end>
|
<topic_start>
|
lists & grids
|
<topic_end>
|
<topic_start>
|
topics
|
<topic_end>
|
<topic_start>
|
use lists
|
displaying lists of data is a fundamental pattern for mobile apps.
|
flutter includes the ListView
|
widget to make working with lists a breeze.
|
<topic_end>
|
<topic_start>
|
create a ListView
|
using the standard ListView constructor is
|
perfect for lists that contain only a few items.
|
the built-in ListTile
|
widget is a way to give items a visual structure.
|
<code_start>
|
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