public override Widget build(BuildContext context)
{
base.build(context); // See AutomaticKeepAliveClientMixin.
D.assert(!_directionIsXAxis || WidgetsD.debugCheckHasDirectionality(context));
Widget background = widget.background;
if (widget.secondaryBackground != null)
{
DismissDirection?direction = _dismissDirection;
if (direction == DismissDirection.endToStart || direction == DismissDirection.up)
{
background = widget.secondaryBackground;
}
}
if (_resizeAnimation != null)
{
// we've been dragged aside, and are now resizing.
D.assert(() => {
if (_resizeAnimation.status != AnimationStatus.forward)
{
D.assert(_resizeAnimation.status == AnimationStatus.completed);
throw new UIWidgetsError(new List <DiagnosticsNode> {
new ErrorSummary("A dismissed Dismissible widget is still part of the tree."),
new ErrorHint(
"Make sure to implement the onDismissed handler and to immediately remove the Dismissible " +
"widget from the application once that handler has fired."
)
});
}
return(true);
});
return(new SizeTransition(
sizeFactor: _resizeAnimation,
axis: _directionIsXAxis ? Axis.vertical : Axis.horizontal,
child: new SizedBox(
width: _sizePriorToCollapse.width,
height: _sizePriorToCollapse.height,
child: background
)
));
}
Widget content = new SlideTransition(
position: _moveAnimation,
child: widget.child
);
if (background != null)
{
List <Widget> children = new List <Widget>();
if (!_moveAnimation.isDismissed)
{
children.Add(Positioned.fill(
child: new ClipRect(
clipper: new _DismissibleClipper(
axis: _directionIsXAxis ? Axis.horizontal : Axis.vertical,
moveAnimation: _moveAnimation
),
child: background
)
));
}
children.Add(content);
content = new Stack(children: children);
}
return(new GestureDetector(
onHorizontalDragStart: _directionIsXAxis ? (GestureDragStartCallback)_handleDragStart : null,
onHorizontalDragUpdate: _directionIsXAxis
? (GestureDragUpdateCallback)_handleDragUpdate
: null,
onHorizontalDragEnd: _directionIsXAxis ? (GestureDragEndCallback)_handleDragEnd : null,
onVerticalDragStart: _directionIsXAxis ? null : (GestureDragStartCallback)_handleDragStart,
onVerticalDragUpdate: _directionIsXAxis
? null
: (GestureDragUpdateCallback)_handleDragUpdate,
onVerticalDragEnd: _directionIsXAxis ? null : (GestureDragEndCallback)_handleDragEnd,
behavior: HitTestBehavior.opaque,
child: content,
dragStartBehavior: widget.dragStartBehavior
));
}
public Table(
Key key = null,
List <TableRow> children = null,
Dictionary <int, TableColumnWidth> columnWidths = null,
TableColumnWidth defaultColumnWidth = null,
TableBorder border = null,
TableCellVerticalAlignment defaultVerticalAlignment = TableCellVerticalAlignment.top,
TextBaseline?textBaseline = null
) : base(key: key)
{
children = children ?? new List <TableRow>();
defaultColumnWidth = defaultColumnWidth ?? new FlexColumnWidth(1.0f);
this.children = children;
this.columnWidths = columnWidths;
this.defaultColumnWidth = defaultColumnWidth;
this.border = border;
this.defaultVerticalAlignment = defaultVerticalAlignment;
this.textBaseline = textBaseline;
D.assert(() => {
if (children.Any((TableRow row) => {
return(row.children.Any((Widget cell) => { return cell == null; }));
}))
{
throw new UIWidgetsError(
"One of the children of one of the rows of the table was null.\n" +
"The children of a TableRow must not be null."
);
}
return(true);
});
D.assert(() => {
if (children.Any((TableRow row1) => {
return(row1.key != null &&
children.Any((TableRow row2) => { return row1 != row2 && row1.key == row2.key; }));
}))
{
throw new UIWidgetsError(
"Two or more TableRow children of this Table had the same key.\n" +
"All the keyed TableRow children of a Table must have different Keys."
);
}
return(true);
});
D.assert(() => {
if (children.isNotEmpty())
{
int cellCount = this.children.First().children.Count;
if (children.Any((TableRow row) => { return(row.children.Count != cellCount); }))
{
throw new UIWidgetsError(
"Table contains irregular row lengths.\n" +
"Every TableRow in a Table must have the same number of children, so that every cell is filled. " +
"Otherwise, the table will contain holes."
);
}
}
return(true);
});
this._rowDecorations = null;
if (children.Any((TableRow row) => { return(row.decoration != null); }))
{
this._rowDecorations = new List <Decoration>();
foreach (TableRow row in children)
{
this._rowDecorations.Add(row.decoration);
}
}
D.assert(() => {
List <Widget> flatChildren = new List <Widget>();
foreach (TableRow row in children)
{
flatChildren.AddRange(row.children);
}
if (WidgetsD.debugChildrenHaveDuplicateKeys(this, flatChildren))
{
throw new UIWidgetsError(
"Two or more cells in this Table contain widgets with the same key.\n" +
"Every widget child of every TableRow in a Table must have different keys. The cells of a Table are " +
"flattened out for processing, so separate cells cannot have duplicate keys even if they are in " +
"different rows."
);
}
return(true);
});
}
public _TheatreElement(RenderObjectWidget widget) : base(widget)
{
D.assert(!WidgetsD.debugChildrenHaveDuplicateKeys(widget, ((_Theatre)widget).offstage));
}
public override Widget build(BuildContext context)
{
D.assert(this.textDirection != null || WidgetsD.debugCheckHasDirectionality(context));
TextDirection textDirection = this.textDirection ?? Directionality.of(context);
IconThemeData iconTheme = IconTheme.of(context);
float iconSize = size ?? iconTheme.size.Value;
if (icon == null)
{
return(new SizedBox(width: iconSize, height: iconSize));
}
float iconOpacity = iconTheme.opacity.Value;
Color iconColor = color ?? iconTheme.color;
if (iconOpacity != 1.0)
{
iconColor = iconColor.withOpacity(iconColor.opacity * iconOpacity);
}
Widget iconWidget = new RichText(
overflow: TextOverflow.visible, // Never clip.
textDirection: textDirection, // Since we already fetched it for the assert...
text: new TextSpan(
text: new string(new[] { (char)icon.codePoint }),
style: new TextStyle(
inherit: false,
color: iconColor,
fontSize: iconSize,
fontFamily: icon.fontFamily
)
)
);
var matrix = Matrix4.identity();
matrix.scale(-1.0f, 1.0f, 1.0f);
if (icon.matchTextDirection)
{
switch (textDirection)
{
case TextDirection.rtl:
iconWidget = new Transform(
transform: matrix,
alignment: Alignment.center,
transformHitTests: false,
child: iconWidget
);
break;
case TextDirection.ltr:
break;
}
}
return(new SizedBox(
width: iconSize,
height: iconSize,
child: new Center(
child: iconWidget
)
));
}