public HSLColor withLightness(float lightness)
{
return(HSLColor.fromAHSL(this.alpha, this.hue, this.saturation, lightness));
}
public override Widget build(BuildContext context)
{
float thumbOffset = 15f;
Color _thumbColor = Colors.black;
return(new LayoutBuilder(builder: (BuildContext _, BoxConstraints box) =>
{
switch (trackType)
{
case TrackType.hue:
thumbOffset += (box.maxWidth - 30f) * hsvColor.hue / 360f;
_thumbColor = HSVColor.fromAHSV(1f, hsvColor.hue, 1f, 1f).toColor();
break;
case TrackType.saturation:
thumbOffset += (box.maxWidth - 30f) * hsvColor.saturation;
_thumbColor =
HSVColor.fromAHSV(1f, hsvColor.hue, hsvColor.saturation, 1f)
.toColor();
break;
case TrackType.saturationForHSL:
thumbOffset += (box.maxWidth - 30f) * Utils.hsvToHsl(hsvColor).saturation;
_thumbColor = HSLColor.fromAHSL(
1f, hsvColor.hue, Utils.hsvToHsl(hsvColor).saturation, 0.5f)
.toColor();
break;
case TrackType.value:
thumbOffset += (box.maxWidth - 30f) * hsvColor.value;
_thumbColor = HSVColor.fromAHSV(1f, hsvColor.hue, 1f, hsvColor.value)
.toColor();
break;
case TrackType.lightness:
thumbOffset += (box.maxWidth - 30f) * Utils.hsvToHsl(hsvColor).lightness;
_thumbColor = HSLColor.fromAHSL(
1f, hsvColor.hue, 1f, Utils.hsvToHsl(hsvColor).lightness)
.toColor();
break;
case TrackType.red:
thumbOffset += (box.maxWidth - 30f) * hsvColor.toColor().red / 0xff;
_thumbColor = hsvColor.toColor().withOpacity(1f);
break;
case TrackType.green:
thumbOffset +=
(box.maxWidth - 30f) * hsvColor.toColor().green / 0xff;
_thumbColor = hsvColor.toColor().withOpacity(1f);
break;
case TrackType.blue:
thumbOffset += (box.maxWidth - 30f) * hsvColor.toColor().blue / 0xff;
_thumbColor = hsvColor.toColor().withOpacity(1f);
break;
case TrackType.alpha:
thumbOffset += (box.maxWidth - 30f) * hsvColor.toColor().opacity;
_thumbColor = Colors.black.withOpacity(hsvColor.alpha);
break;
}//switch
return new CustomMultiChildLayout(
layoutDelegate: new _SliderLayout(),
children: new List <Widget> {
new LayoutId(
id: _SliderLayout.track,
child: new ClipRRect(
borderRadius: BorderRadius.all(Radius.circular(3f)),
child: new CustomPaint(
painter: new TrackPainter(this.trackType, this.hsvColor)
) //CustomPaint
)
), //LayoutId
new LayoutId(
id: _SliderLayout.thumb,
child: Transform.translate(
offset: new Offset(thumbOffset, 0f),
child: new CustomPaint(
painter: new ThumbPainter(
thumbColor: !displayThumbColor ? null : _thumbColor,
fullThumbColor: fullThumbColor
) //ThumbPainter
) //CustomPaint
) //Transform
), //LayoutId
new LayoutId(
id: _SliderLayout.gestureContainer,
child: new LayoutBuilder(
builder: (BuildContext __, BoxConstraints _box) => {
RenderBox getBox = context.findRenderObject() as RenderBox;
return new GestureDetector(
child: new Container(color: Colors.transparent),
onPanDown: (DragDownDetails details) => { slideEvent(getBox, box, details.globalPosition); },
onPanUpdate: (DragUpdateDetails details ) => { slideEvent(getBox, box, details.globalPosition); }
);
}
) //LayoutBuilder
) //LayoutId
} //list Widget
); //CustomMultiChildLayout
})); //LayoutBuilder
}
public HSLColor withSaturation(float saturation)
{
return(HSLColor.fromAHSL(this.alpha, this.hue, saturation, this.lightness));
}
public HSLColorPainter(HSLColor hslColor, Color pointerColor = null)
{
this.hslColor = hslColor;
this.pointerColor = pointerColor;
}