text stringlengths 1 372 |
|---|
dart code: |
colors_demo.dart |
<code_start> |
widget _buildList() { |
return ListView( |
children: [ |
_tile('CineArts at the empire', '85 w portal ave', icons.theaters), |
_tile('The castro theater', '429 castro st', icons.theaters), |
_tile('Alamo drafthouse cinema', '2550 mission st', icons.theaters), |
_tile('Roxie theater', '3117 16th st', icons.theaters), |
_tile('United artists stonestown twin', '501 buckingham way', |
icons.theaters), |
_tile('AMC metreon 16', '135 4th st #3000', icons.theaters), |
const divider(), |
_tile('K\'s kitchen', '757 monterey blvd', icons.restaurant), |
_tile('Emmy\'s restaurant', '1923 ocean ave', icons.restaurant), |
_tile('Chaiya thai restaurant', '272 claremont blvd', icons.restaurant), |
_tile('La ciccia', '291 30th st', icons.restaurant), |
], |
); |
} |
ListTile _tile(String title, string subtitle, IconData icon) { |
return ListTile( |
title: text(title, |
style: const TextStyle( |
fontWeight: FontWeight.w500, |
fontSize: 20, |
)), |
subtitle: text(subtitle), |
leading: icon( |
icon, |
color: colors.blue[500], |
), |
); |
} |
<code_end> |
<topic_end> |
<topic_start> |
stack |
use stack to arrange widgets on top of a base |
widget—often an image. the widgets can completely |
or partially overlap the base widget. |
<topic_end> |
<topic_start> |
summary (stack) |
<topic_end> |
<topic_start> |
examples (stack) |
uses stack to overlay a container |
(that displays its text on a translucent |
black background) on top of a CircleAvatar. |
the stack offsets the text using the alignment property and |
alignments. |
app source: card_and_stack |
uses stack to overlay an icon on top of an image. |
dart code: |
bottom_navigation_demo.dart |
<code_start> |
widget _buildStack() { |
return stack( |
alignment: const alignment(0.6, 0.6), |
children: [ |
const CircleAvatar( |
backgroundImage: AssetImage('images/pic.jpg'), |
radius: 100, |
), |
container( |
decoration: const BoxDecoration( |
color: colors.black45, |
), |
child: const text( |
'mia b', |
style: TextStyle( |
fontSize: 20, |
fontWeight: FontWeight.bold, |
color: colors.white, |
), |
), |
), |
], |
); |
} |
<code_end> |
<topic_end> |
<topic_start> |
card |
a card, from the material library, |
contains related nuggets of information and can |
be composed from almost any widget, but is often used with |
ListTile. card has a single child, |
but its child can be a column, row, list, grid, |
or other widget that supports multiple children. |
by default, a card shrinks its size to 0 by 0 pixels. |
you can use SizedBox to constrain the size of a card. |
in flutter, a card features slightly rounded corners |
and a drop shadow, giving it a 3d effect. |
changing a card’s elevation property allows you to control |
the drop shadow effect. setting the elevation to 24, |
for example, visually lifts the card further from the |
surface and causes the shadow to become more dispersed. |
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