public override Widget buildToolbar(
BuildContext context,
Rect globalEditableRegion,
Offset position,
TextSelectionDelegate selectionDelegate
)
{
float availableHeight
= globalEditableRegion.top - MediaQuery.of(context).padding.top - CustomTextSelectionControlsUtils._kToolbarScreenPadding;
_ArrowDirection direction = availableHeight > CustomTextSelectionControlsUtils._kToolbarHeight
? _ArrowDirection.down
: _ArrowDirection.up;
float y = direction == _ArrowDirection.up
? globalEditableRegion.height + CustomTextSelectionControlsUtils._kToolbarHeight + 6.0f
: 0.0f;
return(new ConstrainedBox(
constraints: BoxConstraints.tight(globalEditableRegion.size),
child: new CustomSingleChildLayout(
layoutDelegate: new _TextSelectionToolbarLayout(
MediaQuery.of(context).size,
globalEditableRegion,
new Offset(position.dx, position.dy + y)
),
child: new _TextSelectionToolbar(
handleCut: this.canCut(selectionDelegate) ? () => this.handleCut(selectionDelegate) : (VoidCallback)null,
handleCopy: this.canCopy(selectionDelegate) ? () => this.handleCopy(selectionDelegate) : (VoidCallback)null,
handlePaste: this.canPaste(selectionDelegate) ? () => this.handlePaste(selectionDelegate) : (VoidCallback)null,
handleSelectAll: this.canSelectAll(selectionDelegate) ? () => this.handleSelectAll(selectionDelegate) : (VoidCallback)null,
arrowDirection: direction
)
)
));
}
internal _TextSelectionToolbarNotchPainter(
_ArrowDirection arrowDirection
)
{
this.arrowDirection = arrowDirection;
}
