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