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Dynamic Widget Manual

Dynamic Widget Manual

Table of contents

Container Widget

Container widget, here to see flutter Container widget definition. Supported json properties:

property definition type value sample
alignment Align the [child] within the container String One of the following string:
topLeft
topCenter
topRight
centerLeft
center
centerRight
bottomLeft
bottomCenter
bottomRight		 "topLeft"
margin Empty space to surround the [decoration] and [child]. String left,top,right,bottom "8,10,12,8"
padding Empty space to inscribe inside the [decoration]. The [child], if any, isplaced inside this padding. String left,top,right,bottom "8,10,12,8"
color Container background color String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
width Container width double 200
height Container height double 200
constraints Container constraints BoxConstraints {"minWidth":100, "maxWidth": 100, "minHeight": 100, "maxHeight": 100}
9999999999 would be the value of double.infinity		 200
child The [child] contained by the container. Widget
click_event Url route string, for example: "route://productDetail?goods_id=123" for navigating to product detail page. String "route://productDetail?goods_id=123"

Text Widget

Text widget, here to see flutter Text widget definition. Supported json properties:

property definition type value sample
data The text to display String "I am a text"
textAlign How the text should be aligned horizontally. String One of the following string:
left (default)
right
center
justify
start
end		 "left"
overflow How visual overflow should be handled. String One of the following string:
ellipsis (default)
clip
fade		 "ellipsis"
maxLines An optional maximum number of lines for the text to span, wrapping if necessary. If the text exceeds the given number of lines, it will be truncated according to overflow. int 3
semanticsLabel An alternative semantics label for this text. String
softWrap Whether the text should break at soft line breaks. bool true
textDirection The directionality of the text. String One of the following string:
ltr (default)
rtl		 "ltr"
textScaleFactor The number of font pixels for each logical pixel. double
textSpan The text to display as a TextSpan. TextSpan

TextSpan

TextSpan, here to see flutter TextSpan definition. Supported json properties:

property definition type value sample
recognizer Url route string, for example: "route://productDetail?goods_id=123" for navigating to product detail page. Currently only supports TapGestureRecognizer String "route://productDetail?goods_id=123"
text The text contained in the span. String "I am a text"
style The style to apply to the text and the children. TextStyle {"color": "#00FFFF", "fontSize": 26.0}
children Additional spans to include as children. List<TextSpan>

TextStyle

TextStyle, here to see flutter TextStyle definition. Supported json properties:

property definition type value sample
color The color to use when painting the text. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
debugLabel A human-readable description of this text style. String
decoration The name of the decoration. String One of the following string: none (default)
lineThrough
overline
underline		 "underline"
fontFamily The name of the font to use when painting the text (e.g., Roboto). If the font is defined in a package, this will be prefixed with 'packages/package_name/' (e.g. 'packages/cool_fonts/Roboto'). The prefixing is done by the constructor when the package argument is provided. String
fontSize The size of glyphs (in logical pixels) to use when painting the text. double
fontStyle The typeface variant to use when drawing the letters (e.g., italics). String One of the following string: italic (default)
normal		 "italic"
fontWeight The typeface thickness to use when painting the text (e.g., bold). String One of the following string: w100
w200
w300
w400
w500
w600
w700
w800
w900
normal (default)
bold		 "bold"

RaisedButton Widget

RaisedButton widget, here to see flutter RaisedButton widget definition. Supported json properties:

property definition type value sample
color The button's fill color, displayed by its Material, while it is in its default (unpressed, enabled) state. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
disabledColor The fill color of the button when the button is disabled. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
disabledElevation The elevation for the button's Material when the button is not enabled. double
disabledTextColor The color to use for this button's text when the button is disabled. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
elevation The z-coordinate at which to place this button. This controls the size of the shadow below the raised button. double
padding The internal padding for the button's child. String left,top,right,bottom "8,10,12,8"
splashColor The splash color of the button's InkWell. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
textColor The color to use for this button's text. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
child The button's label. Widget
click_event Url route string, for example: "route://productDetail?goods_id=123" for navigating to product detail page. String "route://productDetail?goods_id=123"

Row Widget

Row widget, here to see flutter Row widget definition. Supported json properties:

property definition type value sample
crossAxisAlignment How the children should be placed along the cross axis. String One of the following string:
center (default)
start
end
stretch
baseline
mainAxisAlignment How the children should be placed along the main axis. String One of the following string:
start (default)
end
center
spaceBetween
spaceAround
spaceEvenly
mainAxisSize How much space should be occupied in the main axis. String One of the following string:
max (default)
min
textBaseline If aligning items according to their baseline, which baseline to use. String One of the following string:
ideographic (default)
alphabetic
textDirection Determines the order to lay children out horizontally and how to interpret start and end in the horizontal direction. String One of the following string:
ltr (default)
rtl
verticalDirection Determines the order to lay children out vertically and how to interpret start and end in the vertical direction. String One of the following string:
down (default)
up
children The widgets below this widget in the tree. List<TextSpan>

Column Widget

Column widget, here to see flutter Column widget definition. Supported json properties:

property definition type value sample
crossAxisAlignment How the children should be placed along the cross axis. String One of the following string:
center (default)
start
end
stretch
baseline
mainAxisAlignment How the children should be placed along the main axis. String One of the following string:
start (default)
end
center
spaceBetween
spaceAround
spaceEvenly
mainAxisSize How much space should be occupied in the main axis. String One of the following string:
max (default)
min
textBaseline If aligning items according to their baseline, which baseline to use. String One of the following string:
ideographic (default)
alphabetic
textDirection Determines the order to lay children out horizontally and how to interpret start and end in the horizontal direction. String One of the following string:
ltr (default)
rtl
verticalDirection Determines the order to lay children out vertically and how to interpret start and end in the vertical direction. String One of the following string:
down (default)
up
children The widgets below this widget in the tree. List<TextSpan>

AssetImage Widget

AssetImage widget, here to see flutter Asset Image widget definition. Supported json properties:

property definition type value sample
name The picture asset name String 'images/cat.png'
semanticLabel A Semantic description of the image. String
excludeFromSemantics Whether to exclude this image from semantics. bool
scale double
width If non-null, require the image to have this width. double
height If non-null, require the image to have this height. double
color If non-null, this color is blended with each image pixel using colorBlendMode. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
blendMode Used to combine color with this image. String enum values, please see enum BlendMode 'srcIn'
boxFit How to inscribe the image into the space allocated during layout. String enum values, please see enum BoxFit 'none'
alignment How to align the image within its bounds. String enum values, please see enum Alignment, default value is Alignment.center. "center"
repeat How to paint any portions of the layout bounds not covered by the image. String enum values, please see enum ImageRepeat, default value is ImageRepeat.noRepeat. 'noRepeat'
centerSlice The center slice for a nine-patch image. String left,top,right,bottom "8,10,12,8"
matchTextDirection Whether to paint the image in the direction of the TextDirection. bool
gaplessPlayback Whether to continue showing the old image (true), or briefly show nothing (false), when the image provider changes. bool
filterQuality Used to set the FilterQuality of the image. String enum values, please see enum FilterQuality, default value is FilterQuality.low. "low"
click_event Url route string, for example: "route://productDetail?goods_id=123" for navigating to product detail page. String "route://productDetail?goods_id=123"

NetworkImage Widget

NetworkImage widget, here to see flutter Network Image widget definition. Supported json properties:

property definition type value sample
src The picture url String 'http://www.google.com/logo.png'
semanticLabel A Semantic description of the image. String
excludeFromSemantics Whether to exclude this image from semantics. bool
scale double
width If non-null, require the image to have this width. double
height If non-null, require the image to have this height. double
color If non-null, this color is blended with each image pixel using colorBlendMode. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
blendMode Used to combine color with this image. String enum values, please see enum BlendMode 'srcIn'
boxFit How to inscribe the image into the space allocated during layout. String enum values, please see enum BoxFit 'none'
alignment How to align the image within its bounds. String enum values, please see enum Alignment, default value is Alignment.center. "center"
repeat How to paint any portions of the layout bounds not covered by the image. String enum values, please see enum ImageRepeat, default value is ImageRepeat.noRepeat. 'noRepeat'
centerSlice The center slice for a nine-patch image. String left,top,right,bottom "8,10,12,8"
matchTextDirection Whether to paint the image in the direction of the TextDirection. bool
gaplessPlayback Whether to continue showing the old image (true), or briefly show nothing (false), when the image provider changes. bool
filterQuality Used to set the FilterQuality of the image. String enum values, please see enum FilterQuality, default value is FilterQuality.low. "low"
click_event Url route string, for example: "route://productDetail?goods_id=123" for navigating to product detail page. String "route://productDetail?goods_id=123"

FileImage Widget

FileImage widget, here to see flutter File Image widget definition. Supported json properties:

property definition type value sample
filePath The picture file path String '/sdcard/logo.png'
semanticLabel A Semantic description of the image. String
excludeFromSemantics Whether to exclude this image from semantics. bool
scale double
width If non-null, require the image to have this width. double
height If non-null, require the image to have this height. double
color If non-null, this color is blended with each image pixel using colorBlendMode. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
blendMode Used to combine color with this image. String enum values, please see enum BlendMode 'srcIn'
boxFit How to inscribe the image into the space allocated during layout. String enum values, please see enum BoxFit 'none'
alignment How to align the image within its bounds. String enum values, please see enum Alignment, default value is Alignment.center. "center"
repeat How to paint any portions of the layout bounds not covered by the image. String enum values, please see enum ImageRepeat, default value is ImageRepeat.noRepeat. 'noRepeat'
centerSlice The center slice for a nine-patch image. String left,top,right,bottom "8,10,12,8"
matchTextDirection Whether to paint the image in the direction of the TextDirection. bool
gaplessPlayback Whether to continue showing the old image (true), or briefly show nothing (false), when the image provider changes. bool
filterQuality Used to set the FilterQuality of the image. String enum values, please see enum FilterQuality, default value is FilterQuality.low. "low"
click_event Url route string, for example: "route://productDetail?goods_id=123" for navigating to product detail page. String "route://productDetail?goods_id=123"

Placeholder Widget

Placeholder widget, here to see flutter Placeholder widget definition. Supported json properties:

property definition type value sample
color The color to draw the placeholder box. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
strokeWidth The width of the lines in the placeholder box. double
fallbackWidth The width to use when the placeholder is in a situation with an unbounded width. double
fallbackHeight The height to use when the placeholder is in a situation with an unbounded height. double

GridView Widget

GridView widget, here to see flutter GridView widget definition. Supported json properties:

property definition type value sample
crossAxisCount a fixed number of tiles in the cross axis. int
scrollDirection The axis along which the scroll view scrolls. String enum values, please see enum Axis, default value is Axis.vertical. "vertical"
reverse Whether the scroll view scrolls in the reading direction. bool default value is false
shrinkWrap Whether the extent of the scroll view in the scrollDirection should be determined by the contents being viewed. bool default value is false
cacheExtent The viewport has an area before and after the visible area to cache items that are about to become visible when the user scrolls. double default value is 0.0
padding The amount of space by which to inset the children. String left,top,right,bottom "8,10,12,8"
mainAxisSpacing The number of logical pixels between each child along the main axis. double
crossAxisSpacing The number of logical pixels between each child along the cross axis. double
childAspectRatio The ratio of the cross-axis to the main-axis extent of each child. double
children The widgets below this widget in the tree. List<Widget>
pageSize ListView load more item count for next page int this will be append to load more url
loadMoreUrl When listview scroll to bottom, it will do the request. The response of this url should be a json array of widget String
isDemo used in the demo, if true, will do the fake request bool the default value is false

ListView Widget

ListView widget, here to see flutter ListView widget definition. Supported json properties:

property definition type value sample
scrollDirection The axis along which the scroll view scrolls. String enum values, please see enum Axis, default value is Axis.vertical. "vertical"
reverse Whether the scroll view scrolls in the reading direction. bool default value is false
shrinkWrap Whether the extent of the scroll view in the scrollDirection should be determined by the contents being viewed. bool default value is false
cacheExtent The viewport has an area before and after the visible area to cache items that are about to become visible when the user scrolls. double default value is 0.0
padding The amount of space by which to inset the children. String left,top,right,bottom "8,10,12,8"
itemExtent If non-null, forces the children to have the given extent in the scroll direction. double
pageSize ListView load more item count for next page int this will be append to load more url
loadMoreUrl When listview scroll to bottom, it will do the request. The response of this url should be a json array of widget String
isDemo used in the demo, if true, will do the fake request bool the default value is false
children The widgets below this widget in the tree. List<Widget>

PageView Widget

PageView widget, here to see flutter PageView widget definition. Supported json properties:

property definition type value sample
scrollDirection The axis along which the scroll view scrolls. String enum values, please see enum Axis, default value is Axis.vertical. "vertical"
reverse Whether the scroll view scrolls in the reading direction. bool default value is false
pageSnapping Set to false to disable page snapping, useful for custom scroll behavior. bool default value is true
children The widgets below this widget in the tree. List<Widget>

Expanded Widget

Expanded widget, here to see flutter Expanded widget definition. Supported json properties:

property definition type value sample
child child widget Widget
flex The flex factor to use for this child int default value is 1

Padding Widget

Padding widget, here to see flutter Padding widget definition. Supported json properties:

property definition type value sample
child child widget Widget
padding The amount of space by which to inset the child. String left,top,right,bottom "8,10,12,8"

Center Widget

Center widget, here to see flutter Center widget definition. Supported json properties:

property definition type value sample
child child widget Widget
widthFactor If non-null, sets its width to the child's width multiplied by this factor. double
heightFactor If non-null, sets its height to the child's height multiplied by this factor. double

Align Widget

Align widget, here to see flutter Align widget definition. Supported json properties:

property definition type value sample
alignment How to align the child. String enum values, please see enum Alignment, default value is Alignment.center.
child child widget Widget
widthFactor If non-null, sets its width to the child's width multiplied by this factor. double
heightFactor If non-null, sets its height to the child's height multiplied by this factor. double

AspectRatio Widget

AspectRatio widget, here to see flutter AspectRatio widget definition. Supported json properties:

property definition type value sample
aspectRatio The aspect ratio to attempt to use. double
child child widget Widget

FittedBox Widget

FittedBox widget, here to see flutter FittedBox widget definition. Supported json properties:

property definition type value sample
alignment How to align the child within its parent's bounds. String enum values, please see enum Alignment, default value is Alignment.center.
fit How to inscribe the child into the space allocated during layout. String enum values, please see enum BoxFit, default value is BoxFit.contain.
child child widget Widget

Baseline Widget

Baseline widget, here to see flutter Baseline widget definition. Supported json properties:

property definition type value sample
baseline The number of logical pixels from the top of this box at which to position the child's baseline. double
baselineType The type of baseline to use for positioning the child. String enum values, please see enum TextBaseline, default value is TextBaseline.ideographic.
child child widget Widget

Stack Widget

Stack widget, here to see flutter Stack widget definition. Supported json properties:

property definition type value sample
alignment How to align the non-positioned and partially-positioned children in the stack. String enum values, please see enum Alignment, default value is Alignment.center. "center"
fit How to size the non-positioned children in the stack. String enum values, please see enum StackFit, default value is StackFit.loose.
clipBehavior The content will be clipped (or not) according to this option. String enum values, please see enum Clip, default value is Clip.hardEdge.
textDirection The text direction with which to resolve alignment. String enum values, please see enum TextDirection
children list of Widget List<Widget>

Positioned Widget

Positioned widget, here to see flutter Positioned widget definition. Supported json properties:

property definition type value sample
bottom The distance that the child's bottom edge is inset from the bottom of the stack. double
height The child's height. double
left The distance that the child's left edge is inset from the left of the stack. double
right The distance that the child's right edge is inset from the right of the stack. double
top The distance that the child's top edge is inset from the top of the stack. double
width The child's width. double
child The widget below this widget in the tree. Widget

IndexedStack Widget

IndexedStack widget, here to see flutter IndexedStack widget definition. Supported json properties:

property definition type value sample
index The index of the child to show. int
alignment How to align the non-positioned and partially-positioned children in the stack. String enum values, please see enum Alignment, default value is Alignment.center. "center"
textDirection The text direction with which to resolve alignment. String enum values, please see enum TextDirection
children list of Widget List<Widget>

ExpandedSizedBox Widget

ExpandedSizedBox widget, here to see flutter ExpandedSizedBox widget definition. It's a shortcut of SizedBox.expand. Supported json properties:

property definition type value sample
child The widget below this widget in the tree. Widget

SizedBox Widget

SizedBox widget, here to see flutter SizedBox widget definition. Supported json properties:

property definition type value sample
width If non-null, requires the child to have exactly this width. double
height If non-null, requires the child to have exactly this height. double
child The widget below this widget in the tree. Widget

Opacity Widget

Opacity widget, here to see flutter Opacity widget definition. Supported json properties:

property definition type value sample
alwaysIncludeSemantics Whether the semantic information of the children is always included. bool
opacity The fraction to scale the child's alpha value. double
child The widget below this widget in the tree. Widget

Wrap Widget

Wrap widget, here to see flutter Wrap widget definition. Supported json properties:

property definition type value sample
alignment How the children within a run should be placed in the main axis. String enum values, please see enum WrapAlignment, default value is WrapAlignment.start. "start"
crossAxisAlignment How the children within a run should be aligned relative to each other in the cross axis. String enum values, please see enum WrapCrossAlignment, default value is WrapCrossAlignment.start. "start"
direction The direction to use as the main axis. String enum values, please see enum Axis, default value is Axis.horizontal. "horizontal"
runAlignment How the runs themselves should be placed in the cross axis. String enum values, please see enum WrapAlignment, default value is WrapAlignment.start. "start"
runSpacing The fraction to scale the child's alpha value. double 0.0
spacing How much space to place between children in a run in the main axis. double 0.0
textDirection Determines the order to lay children out horizontally and how to interpret start and end in the horizontal direction. String enum values, please see enum TextDirection, default value is null. null
verticalDirection Determines the order to lay children out vertically and how to interpret start and end in the vertical direction. String enum values, please see enum VerticalDirection, default value is VerticalDirection.down. "down"
children The widgets below this widget in the tree. List<Widget>

ClipRRect Widget

ClipRRect, here to see flutter ClipRRect definition. Supported json properties:

property definition type value sample
borderRadius The border radius of the rounded corners. String "topLeft,topRight,bottomLeft,bottomRight"
clipBehavior Controls how to clip (default to "antiAlias") String enum values, please see enum Clip, default value is antiAlias. "hardEdge"
child The widget below this widget in the tree. Widget

SafeArea Widget

SafeArea, here to see flutter SafeArea definition. Supported json properties:

property definition type value sample
bottom Whether to avoid system intrusions on the bottom side of the screen. bool true or false, default is true true
right Whether to avoid system intrusions on the right. bool true or false, default is true true
top Whether to avoid system intrusions at the top of the screen, typically the system status bar. bool true or false, default is true true
left Whether to avoid system intrusions on the left. bool true or false, default is true true
minimum This minimum padding to apply. String left,top,right,bottom "8,10,12,8"
child The widget below this widget in the tree. Widget

ListTile Widget

ListTile, here to see flutter ListTile definition. Supported json properties:

property definition type value sample
contentPadding The tile's internal padding. String left,top,right,bottom "8,10,12,8"
dense Whether this list tile is part of a vertically dense list. bool true or false, default is false true
enabled Whether this list tile is interactive. bool true or false, default is true true
isThreeLine Whether this list tile is intended to display three lines of text. bool true or false, default is false true
leading A widget to display before the title. Widget
tapEvent tap event String route://goToProductDetail
selected If this tile is also enabled then icons and text are rendered with the same color. bool true or false, default is false true
subtitle Additional content displayed below the title. Widget
title The primary content of the list tile. Widget
trailing A widget to display after the title. Widget

SelectableText Widget

SelectableText, here to see flutter SelectableText definition. Supported json properties:

property definition type value sample
data The text to display String "I am a text"
textAlign How the text should be aligned horizontally. String One of the following string:
left (default)
right
center
justify
start
end		 "left"
maxLines An optional maximum number of lines for the text to span, wrapping if necessary. If the text exceeds the given number of lines, it will be truncated according to overflow. int 3
textDirection The directionality of the text. String One of the following string:
ltr (default)
rtl		 "ltr"
textSpan The text to display as a TextSpan. TextSpan

Icon Widget

Icon, here to see flutter Icon definition. Supported json properties:

property definition type value sample
data The icon to display. The available icons are described String "fa.google" : font_awesome_flutter lib's icon, "favorite" : flutter's icon
size The size of the icon in logical pixels. double 12.0
color The color to use when drawing the icon. String "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"
semanticLabel Semantic label for the icon. String
textDirection The text direction to use for rendering the icon. String One of the following string:
ltr (default)
rtl		 "ltr"

DropCapText Widget

DropCapText, Supported json properties:

property definition type value sample
data The text to display String
selectable Text can be selected bool
mode Drop cap mode String One of the following string:
inside (default)
upwards
aside
baseline		 "#FF00FF"
"#00FF00FF"
style The style to apply to the text and the children. TextStyle {"color": "#00FFFF", "fontSize": 26.0}
dropCapStyle The drop cap letter style TextStyle {"color": "#00FFFF", "fontSize": 26.0}
textAlign How the text should be aligned horizontally. String One of the following string:
left (default)
right
center
justify
start
end		 "left"
dropCap The drop cap Widget {"width":216.1,"height":162.1,"child":{"type":"NetworkImage","src":"https://b.appsimg.com/upload/momin/2019/01/23/101/1548249269085.png ","click_event" : "route://productDetail?goods_id=123"}}
dropCapStyle The drop cap padding String left,top,right,bottom "8,10,12,8"
dropCapChars The drop cap chars length int 1
forceNoDescent forceNoDescent bool
parseInlineMarkdown if parse markdown bool
textDirection The directionality of the text. String One of the following string:
ltr (default)
rtl		 "ltr"
overflow How visual overflow should be handled. String One of the following string:
ellipsis (default)
clip
fade		 "ellipsis"
maxLines An optional maximum number of lines for the text to span, wrapping if necessary. If the text exceeds the given number of lines, it will be truncated according to overflow. int One of the following string:
start (default)
end		 "end"
dropCapPosition drop cap position String 3

Scaffold Widget

Scaffold, Supported json properties:

property definition type value sample
appBar An app bar to display at the top of the scaffold. Widget
body The primary content of the scaffold. Widget
floatingActionButton A button displayed floating above [body], in the bottom right corner. Widget
backgroundColor The color of the [Material] widget that underlies the entire Scaffold. "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"

AppBar Widget

AppBar, Supported json properties:

property definition type value sample
title The primary widget displayed in the app bar. Widget
leading A widget to display before the [title]. Widget
actions Widgets to display in a row after the [title] widget. List
centerTitle Whether the title should be centered. bool
backgroundColor The color to use for the app bar's material. Typically this should be set along with [brightness], [iconTheme], [textTheme]. "#AARRGGBB" or "#RRGGBB" "#FF00FF"
"#00FF00FF"

LimitedBox Widget

LimitedBox, here to see flutter LimitedBox definition. Supported json properties:

property definition type value sample
maxHeight The maximum height limit to apply in the absence of a BoxConstraints.maxHeight constraint. double
maxWidth The maximum width limit to apply in the absence of a BoxConstraints.maxWidth constraint. double
child The widget below this widget in the tree. Widget

Offstage Widget

Offstage, here to see flutter Offstage definition. Supported json properties:

property definition type value sample
offstage Whether the child is hidden from the rest of the tree. bool
child The widget below this widget in the tree. Widget

OverflowBox Widget

OverflowBox, here to see flutter OverflowBox definition. Supported json properties:

property definition type value sample
alignment How to align the child. String One of the following string:
topLeft
topCenter
topRight
centerLeft
center
centerRight
bottomLeft
bottomCenter
bottomRight		 "topLeft"
maxHeight The maximum height constraint to give the child. Set this to null (the default) to use the constraint from the parent instead. double
maxWidth The maximum width constraint to give the child. Set this to null (the default) to use the constraint from the parent instead. double
minHeight The minimum height constraint to give the child. Set this to null (the default) to use the constraint from the parent instead. double
minWidth The minimum width constraint to give the child. Set this to null (the default) to use the constraint from the parent instead. double
child The widget below this widget in the tree. Widget