public override Path getInnerPath(Rect rect, TextDirection?textDirection = null)
{
var path = new Path();
path.addOval(Rect.fromCircle(
center: rect.center,
radius: Mathf.Max(0.0f, rect.shortestSide / 2.0f - side.width)
));
return(path);
}
public override Path getOuterPath(Rect rect, TextDirection?textDirection = null)
{
var path = new Path();
path.addOval(Rect.fromCircle(
center: rect.center,
radius: rect.shortestSide / 2.0f
));
return(path);
}
public override void paint(Canvas canvas, Size size)
{
Paint paint = new Paint();
paint.color = color;
float radius = size.width / 2.0f;
Rect circle = Rect.fromCircle(center: new Offset(radius, radius), radius: radius);
Rect point = Rect.fromLTWH(0.0f, 0.0f, radius, radius);
Path path = new Path();
path.addOval(circle);
path.addRect(point);
canvas.drawPath(path, paint);
}
public override void paint(PaintingContext context, Offset offset)
{
float visualPosition = 0.0f;
Color leftColor = null;
Color rightColor = null;
switch (textDirection)
{
case TextDirection.rtl:
visualPosition = 1.0f - _position.value;
leftColor = _activeColor;
rightColor = trackColor;
break;
case TextDirection.ltr:
visualPosition = _position.value;
leftColor = trackColor;
rightColor = _activeColor;
break;
}
float trackCenter = offset.dy + size.height / 2.0f;
float trackLeft = offset.dx + _trackLeft;
float trackTop = trackCenter - 1.0f;
float trackBottom = trackCenter + 1.0f;
float trackRight = offset.dx + _trackRight;
float trackActive = offset.dx + _thumbCenter;
Canvas canvas = context.canvas;
if (visualPosition > 0.0f)
{
Paint paint = new Paint();
paint.color = rightColor;
canvas.drawRRect(RRect.fromLTRBXY(trackLeft, trackTop, trackActive, trackBottom, 1.0f, 1.0f), paint);
}
if (visualPosition < 1.0f)
{
Paint paint = new Paint();
paint.color = leftColor;
canvas.drawRRect(RRect.fromLTRBXY(trackActive, trackTop, trackRight, trackBottom, 1.0f, 1.0f), paint);
}
Offset thumbCenter = new Offset(trackActive, trackCenter);
new CupertinoThumbPainter(color: thumbColor).paint(canvas, Rect.fromCircle(center: thumbCenter, radius: CupertinoThumbPainter.radius));
}
public bool hitTestInteractive(Offset position)
{
if (_thumbRect == null)
{
return(false);
}
if (fadeoutOpacityAnimation.value == 0.0f)
{
return(false);
}
Rect interactiveThumbRect = _thumbRect.expandToInclude(
Rect.fromCircle(center: _thumbRect.center, radius: ScrollbarPainterUtils._kMinInteractiveSize / 2)
);
return(interactiveThumbRect.contains(position));
}
void paint(PaintingContext context, Offset offset)
{
float visualPosition;
Color leftColor;
Color rightColor;
visualPosition = this._position.value;
leftColor = SliderUtils._kTrackColor;
rightColor = this._activeColor;
float trackCenter = offset.dy + this.size.height / 2.0f;
float trackLeft = offset.dx + this._trackLeft;
float trackTop = trackCenter - 1.0f;
float trackBottom = trackCenter + 1.0f;
float trackRight = offset.dx + this._trackRight;
float trackActive = offset.dx + this._thumbCenter;
Canvas canvas = context.canvas;
if (visualPosition > 0.0f)
{
Paint paint = new Paint();
paint.color = rightColor;
canvas.drawRRect(RRect.fromLTRBXY(trackLeft, trackTop, trackActive, trackBottom, 1.0f, 1.0f), paint);
}
if (visualPosition < 1.0f)
{
Paint paint = new Paint();
paint.color = leftColor;
canvas.drawRRect(RRect.fromLTRBXY(trackActive, trackTop, trackRight, trackBottom, 1.0f, 1.0f), paint);
}
Offset thumbCenter = new Offset(trackActive, trackCenter);
this._thumbPainter.paint(canvas,
Rect.fromCircle(center: thumbCenter, radius: CupertinoThumbPainter.radius));
}
public override void paint(Canvas canvas, Size size)
{
float halfStrokeWidth = 1.0f;
Paint paint = new Paint();
paint.color = color;
Rect circle = Rect.fromCircle(
center: new Offset(CupertinoTextSelectionUtils._kSelectionHandleRadius, CupertinoTextSelectionUtils._kSelectionHandleRadius),
radius: CupertinoTextSelectionUtils._kSelectionHandleRadius
);
Rect line = Rect.fromPoints(
new Offset(
CupertinoTextSelectionUtils._kSelectionHandleRadius - halfStrokeWidth,
2 * CupertinoTextSelectionUtils._kSelectionHandleRadius - CupertinoTextSelectionUtils._kSelectionHandleOverlap
),
new Offset(CupertinoTextSelectionUtils._kSelectionHandleRadius + halfStrokeWidth, size.height)
);
Path path = new Path();
path.addOval(circle);
// Draw line so it slightly overlaps the circle.
path.addRect(line);
canvas.drawPath(path, paint);
}
public override Widget build(BuildContext context)
{
LayerLink layerLink = null;
TextSelectionHandleType type = TextSelectionHandleType.left;
switch (widget.position)
{
case _TextSelectionHandlePosition.start:
layerLink = widget.startHandleLayerLink;
type = _chooseType(
widget.renderObject.textDirection,
TextSelectionHandleType.left,
TextSelectionHandleType.right
);
break;
case _TextSelectionHandlePosition.end:
D.assert(!widget.selection.isCollapsed);
layerLink = widget.endHandleLayerLink;
type = _chooseType(
widget.renderObject.textDirection,
TextSelectionHandleType.right,
TextSelectionHandleType.left
);
break;
}
Offset handleAnchor = widget.selectionControls.getHandleAnchor(
type,
widget.renderObject.preferredLineHeight
);
Size handleSize = widget.selectionControls.getHandleSize(
widget.renderObject.preferredLineHeight
);
Rect handleRect = Rect.fromLTWH(
-handleAnchor.dx,
-handleAnchor.dy,
handleSize.width,
handleSize.height
);
Rect interactiveRect = handleRect.expandToInclude(
Rect.fromCircle(center: handleRect.center, radius: kMinInteractiveDimension / 2)
);
RelativeRect padding = RelativeRect.fromLTRB(
Mathf.Max((interactiveRect.width - handleRect.width) / 2, 0),
Mathf.Max((interactiveRect.height - handleRect.height) / 2, 0),
Mathf.Max((interactiveRect.width - handleRect.width) / 2, 0),
Mathf.Max((interactiveRect.height - handleRect.height) / 2, 0)
);
return(new CompositedTransformFollower(
link: layerLink,
offset: interactiveRect.topLeft,
showWhenUnlinked: false,
child: new FadeTransition(
opacity: _opacity,
child: new Container(
alignment: Alignment.topLeft,
width: interactiveRect.width,
height: interactiveRect.height,
child: new GestureDetector(
behavior: HitTestBehavior.translucent,
dragStartBehavior: widget.dragStartBehavior,
onPanStart: _handleDragStart,
onPanUpdate: _handleDragUpdate,
onTap: _handleTap,
child: new Padding(
padding: EdgeInsets.only(
left: padding.left,
top: padding.top,
right: padding.right,
bottom: padding.bottom
),
child: widget.selectionControls.buildHandle(context, type,
widget.renderObject.preferredLineHeight)
)
)
)
)
));
}
static void _addArc(Path path, Offset center, float radius, float startAngle, float endAngle)
{
Rect arcRect = Rect.fromCircle(center: center, radius: radius);
path.arcTo(arcRect, startAngle, endAngle - startAngle, false);
}
