void _handleTap()
{
RenderBox itemBox = (RenderBox)context.findRenderObject();
Rect itemRect = itemBox.localToGlobal(Offset.zero) & itemBox.size;
TextDirection textDirection = Directionality.of(context);
EdgeInsetsGeometry menuMargin = ButtonTheme.of(context).alignedDropdown
? material_._kAlignedMenuMargin
: material_._kUnalignedMenuMargin;
List <_MenuItem <T> > menuItems = new List <_MenuItem <T> >(new _MenuItem <T> [widget.items.Count]);
for (int index = 0; index < widget.items.Count; index += 1)
{
var pindex = index;
menuItems[pindex] = new _MenuItem <T>(
item: widget.items[pindex],
onLayout: (Size size) => {
if (_dropdownRoute == null)
{
return;
}
_dropdownRoute.itemHeights[pindex] = size.height;
}
);
}
D.assert(_dropdownRoute == null);
_dropdownRoute = new _DropdownRoute <T>(
items: menuItems,
buttonRect: menuMargin.resolve(textDirection).inflateRect(itemRect),
padding: material_._kMenuItemPadding.resolve(textDirection),
selectedIndex: _selectedIndex ?? 0,
elevation: widget.elevation,
theme: Theme.of(context, shadowThemeOnly: true),
style: _textStyle,
barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
itemHeight: widget.itemHeight,
dropdownColor: widget.dropdownColor
);
Navigator.push <T>(context, _dropdownRoute).then(newValue => {
_DropdownRouteResult <T> value = newValue as _DropdownRouteResult <T>;
_removeDropdownRoute();
if (!mounted || newValue == null)
{
return;
}
if (widget.onChanged != null)
{
widget.onChanged(value.result);
}
});
if (widget.onTap != null)
{
widget.onTap();
}
}
public override Widget build(BuildContext context)
{
D.assert(WidgetsD.debugCheckHasDirectionality(context));
if (route.scrollController == null)
{
_MenuLimits menuLimits = route.getMenuLimits(buttonRect, constraints.maxHeight, selectedIndex ?? 0);
route.scrollController = new ScrollController(initialScrollOffset: menuLimits.scrollOffset ?? 0);
}
TextDirection textDirection = Directionality.of(context);
Widget menu = new _DropdownMenu <T>(
route: route,
padding: padding.resolve(textDirection),
buttonRect: buttonRect,
constraints: constraints,
dropdownColor: dropdownColor
);
if (theme != null)
{
menu = new Theme(data: theme, child: menu);
}
return(MediaQuery.removePadding(
context: context,
removeTop: true,
removeBottom: true,
removeLeft: true,
removeRight: true,
child: new Builder(
builder: (BuildContext _context) => {
return new CustomSingleChildLayout(
layoutDelegate: new _DropdownMenuRouteLayout <T>(
buttonRect: buttonRect,
route: route,
textDirection: textDirection
),
child: menu
);
}
)
));
}
public override Widget build(BuildContext context)
{
D.assert(material_.debugCheckHasMaterial(context));
ThemeData theme = Theme.of(context);
ListTileTheme tileTheme = ListTileTheme.of(context);
IconThemeData iconThemeData = null;
if (leading != null || trailing != null)
{
iconThemeData = new IconThemeData(color: _iconColor(theme, tileTheme));
}
Widget leadingIcon = null;
if (leading != null)
{
leadingIcon = IconTheme.merge(
data: iconThemeData,
child: leading);
}
TextStyle titleStyle = _titleTextStyle(theme, tileTheme);
Widget titleText = new AnimatedDefaultTextStyle(
style: titleStyle,
duration: material_.kThemeChangeDuration,
child: title ?? new SizedBox()
);
Widget subtitleText = null;
TextStyle subtitleStyle = null;
if (subtitle != null)
{
subtitleStyle = _subtitleTextStyle(theme, tileTheme);
subtitleText = new AnimatedDefaultTextStyle(
style: subtitleStyle,
duration: material_.kThemeChangeDuration,
child: subtitle);
}
Widget trailingIcon = null;
if (trailing != null)
{
trailingIcon = IconTheme.merge(
data: iconThemeData,
child: trailing);
}
EdgeInsets _defaultContentPadding = EdgeInsets.symmetric(horizontal: 16.0f);
TextDirection textDirection = Directionality.of(context);
EdgeInsets resolvedContentPadding =
contentPadding?.resolve(textDirection) ?? tileTheme?.contentPadding?.resolve(textDirection) ?? _defaultContentPadding;
return(new InkWell(
onTap: enabled?onTap: null,
onLongPress: enabled ? onLongPress : null,
canRequestFocus: enabled,
child: new SafeArea(
top: false,
bottom: false,
mininum: resolvedContentPadding,
child: new _ListTile(
leading: leadingIcon,
title: titleText,
subtitle: subtitleText,
trailing: trailingIcon,
isDense: _isDenseLayout(tileTheme),
isThreeLine: isThreeLine,
titleBaselineType: titleStyle.textBaseline,
subtitleBaselineType: subtitleStyle?.textBaseline
)
)
));
}