public override void paint(
PaintingContext context,
Offset center,
RenderBox parentBox = null,
SliderThemeData sliderTheme = null,
Animation <float> enableAnimation = null,
Offset thumbCenter = null,
bool?isEnabled = null
)
{
Color begin;
Color end;
bool isTickMarkRightOfThumb = center.dx > thumbCenter.dx;
begin = isTickMarkRightOfThumb
? sliderTheme.disabledInactiveTickMarkColor
: sliderTheme.disabledActiveTickMarkColor;
end = isTickMarkRightOfThumb ? sliderTheme.inactiveTickMarkColor : sliderTheme.activeTickMarkColor;
Paint paint = new Paint {
color = new ColorTween(begin: begin, end: end).evaluate(enableAnimation)
};
float tickMarkRadius = this.getPreferredSize(
isEnabled: isEnabled,
sliderTheme: sliderTheme
).width / 2f;
context.canvas.drawCircle(center, tickMarkRadius, paint);
}
public static SliderThemeData lerp(SliderThemeData a, SliderThemeData b, float t)
{
D.assert(a != null);
D.assert(b != null);
return(new SliderThemeData(
trackHeight: MathUtils.lerpFloat(a.trackHeight, b.trackHeight, t),
activeTrackColor: Color.lerp(a.activeTrackColor, b.activeTrackColor, t),
inactiveTrackColor: Color.lerp(a.inactiveTrackColor, b.inactiveTrackColor, t),
disabledActiveTrackColor: Color.lerp(a.disabledActiveTrackColor, b.disabledActiveTrackColor, t),
disabledInactiveTrackColor: Color.lerp(a.disabledInactiveTrackColor, b.disabledInactiveTrackColor, t),
activeTickMarkColor: Color.lerp(a.activeTickMarkColor, b.activeTickMarkColor, t),
inactiveTickMarkColor: Color.lerp(a.inactiveTickMarkColor, b.inactiveTickMarkColor, t),
disabledActiveTickMarkColor: Color.lerp(a.disabledActiveTickMarkColor, b.disabledActiveTickMarkColor,
t),
disabledInactiveTickMarkColor: Color.lerp(a.disabledInactiveTickMarkColor,
b.disabledInactiveTickMarkColor, t),
thumbColor: Color.lerp(a.thumbColor, b.thumbColor, t),
disabledThumbColor: Color.lerp(a.disabledThumbColor, b.disabledThumbColor, t),
overlayColor: Color.lerp(a.overlayColor, b.overlayColor, t),
valueIndicatorColor: Color.lerp(a.valueIndicatorColor, b.valueIndicatorColor, t),
trackShape: t < 0.5 ? a.trackShape : b.trackShape,
tickMarkShape: t < 0.5 ? a.tickMarkShape : b.tickMarkShape,
thumbShape: t < 0.5 ? a.thumbShape : b.thumbShape,
overlayShape: t < 0.5 ? a.overlayShape : b.overlayShape,
valueIndicatorShape: t < 0.5 ? a.valueIndicatorShape : b.valueIndicatorShape,
showValueIndicator: t < 0.5 ? a.showValueIndicator : b.showValueIndicator,
valueIndicatorTextStyle: TextStyle.lerp(a.valueIndicatorTextStyle, b.valueIndicatorTextStyle, t)
));
}
public bool Equals(SliderThemeData other)
{
if (ReferenceEquals(null, other))
{
return(false);
}
if (ReferenceEquals(this, other))
{
return(true);
}
return(other.trackHeight == this.trackHeight &&
other.activeTrackColor == this.activeTrackColor &&
other.inactiveTrackColor == this.inactiveTrackColor &&
other.disabledActiveTrackColor == this.disabledActiveTrackColor &&
other.disabledInactiveTrackColor == this.disabledInactiveTrackColor &&
other.activeTickMarkColor == this.activeTickMarkColor &&
other.inactiveTickMarkColor == this.inactiveTickMarkColor &&
other.disabledActiveTickMarkColor == this.disabledActiveTickMarkColor &&
other.disabledInactiveTickMarkColor == this.disabledInactiveTickMarkColor &&
other.thumbColor == this.thumbColor &&
other.disabledThumbColor == this.disabledThumbColor &&
other.overlayColor == this.overlayColor &&
other.valueIndicatorColor == this.valueIndicatorColor &&
other.trackShape == this.trackShape &&
other.tickMarkShape == this.tickMarkShape &&
other.thumbShape == this.thumbShape &&
other.overlayShape == this.overlayShape &&
other.valueIndicatorShape == this.valueIndicatorShape &&
other.showValueIndicator == this.showValueIndicator &&
other.valueIndicatorTextStyle == this.valueIndicatorTextStyle);
}
public override void paint(
PaintingContext context,
Offset center,
Animation <float> activationAnimation = null,
Animation <float> enableAnimation = null,
bool?isDiscrete = null,
TextPainter labelPainter = null,
RenderBox parentBox = null,
SliderThemeData sliderTheme = null,
float?value = null
)
{
Canvas canvas = context.canvas;
FloatTween radiusTween = new FloatTween(
begin: 0.0f,
end: this.overlayRadius
);
canvas.drawCircle(
center,
radiusTween.evaluate(activationAnimation),
new Paint {
color = sliderTheme.overlayColor
}
);
}
public override void paint(
PaintingContext context,
Offset center,
Animation <float> activationAnimation = null,
Animation <float> enableAnimation = null,
bool?isDiscrete = null,
TextPainter labelPainter = null,
RenderBox parentBox = null,
SliderThemeData sliderTheme = null,
float?value = null)
{
ColorTween enableColor = new ColorTween(
begin: sliderTheme.disabledThumbColor,
end: sliderTheme.valueIndicatorColor
);
this._drawValueIndicator(
parentBox,
context.canvas,
center,
new Paint {
color = enableColor.evaluate(enableAnimation)
},
activationAnimation.value,
labelPainter
);
}
public override Widget build(BuildContext context)
{
D.assert(MaterialD.debugCheckHasMaterial(context));
D.assert(WidgetsD.debugCheckHasMediaQuery(context));
SliderThemeData sliderTheme = SliderTheme.of(context);
if (this.widget.activeColor != null || this.widget.inactiveColor != null)
{
sliderTheme = sliderTheme.copyWith(
activeTrackColor: this.widget.activeColor,
inactiveTrackColor: this.widget.inactiveColor,
activeTickMarkColor: this.widget.inactiveColor,
inactiveTickMarkColor: this.widget.activeColor,
thumbColor: this.widget.activeColor,
valueIndicatorColor: this.widget.activeColor,
overlayColor: this.widget.activeColor?.withAlpha(0x29)
);
}
return(new _SliderRenderObjectWidget(
value: this._unlerp(this.widget.value),
divisions: this.widget.divisions,
label: this.widget.label,
sliderTheme: sliderTheme,
mediaQueryData: MediaQuery.of(context),
onChanged: (this.widget.onChanged != null) && (this.widget.max > this.widget.min)
? this._handleChanged
: (ValueChanged <float>)null,
onChangeStart: this.widget.onChangeStart != null ? this._handleDragStart : (ValueChanged <float>)null,
onChangeEnd: this.widget.onChangeEnd != null ? this._handleDragEnd : (ValueChanged <float>)null,
state: this
));
}
public override Size getPreferredSize(
SliderThemeData sliderTheme = null,
bool?isEnabled = null
)
{
return(Size.fromRadius(this.tickMarkRadius ?? sliderTheme.trackHeight / 2f));
}
public _RenderSlider(
float?value = null,
int?divisions = null,
string label = null,
SliderThemeData sliderTheme = null,
MediaQueryData mediaQueryData = null,
RuntimePlatform?platform = null,
ValueChanged <float> onChanged = null,
ValueChanged <float> onChangeStart = null,
ValueChanged <float> onChangeEnd = null,
_SliderState state = null,
TextDirection?textDirection = null
)
{
D.assert(value != null && value >= 0.0 && value <= 1.0);
D.assert(state != null);
D.assert(textDirection != null);
this.onChangeStart = onChangeStart;
this.onChangeEnd = onChangeEnd;
_platform = platform;
_label = label;
_value = value.Value;
_divisions = divisions;
_sliderTheme = sliderTheme;
_mediaQueryData = mediaQueryData;
_onChanged = onChanged;
_state = state;
_textDirection = textDirection.Value;
_updateLabelPainter();
GestureArenaTeam team = new GestureArenaTeam();
_drag = new HorizontalDragGestureRecognizer {
team = team,
onStart = _handleDragStart,
onUpdate = _handleDragUpdate,
onEnd = _handleDragEnd,
onCancel = _endInteraction
};
_tap = new TapGestureRecognizer {
team = team,
onTapDown = _handleTapDown,
onTapUp = _handleTapUp,
onTapCancel = _endInteraction
};
_overlayAnimation = new CurvedAnimation(
parent: _state.overlayController,
curve: Curves.fastOutSlowIn);
_valueIndicatorAnimation = new CurvedAnimation(
parent: _state.valueIndicatorController,
curve: Curves.fastOutSlowIn);
_enableAnimation = new CurvedAnimation(
parent: _state.enableController,
curve: Curves.easeInOut);
}
public override Widget build(BuildContext context)
{
D.assert(material_.debugCheckHasMaterial(context));
D.assert(WidgetsD.debugCheckHasMediaQuery(context));
ThemeData theme = Theme.of(context);
SliderThemeData sliderTheme = SliderTheme.of(context);
sliderTheme = sliderTheme.copyWith(
trackHeight: sliderTheme.trackHeight ?? _defaultTrackHeight,
activeTrackColor: widget.activeColor ?? sliderTheme.activeTrackColor ?? theme.colorScheme.primary,
inactiveTrackColor: widget.inactiveColor ??
sliderTheme.inactiveTrackColor ?? theme.colorScheme.primary.withOpacity(0.24f),
disabledActiveTrackColor: sliderTheme.disabledActiveTrackColor ??
theme.colorScheme.onSurface.withOpacity(0.32f),
disabledInactiveTrackColor: sliderTheme.disabledInactiveTrackColor ??
theme.colorScheme.onSurface.withOpacity(0.12f),
activeTickMarkColor: widget.inactiveColor ??
sliderTheme.activeTickMarkColor ?? theme.colorScheme.onPrimary.withOpacity(0.54f),
inactiveTickMarkColor: widget.activeColor ??
sliderTheme.inactiveTickMarkColor ??
theme.colorScheme.primary.withOpacity(0.54f),
disabledActiveTickMarkColor: sliderTheme.disabledActiveTickMarkColor ??
theme.colorScheme.onPrimary.withOpacity(0.12f),
disabledInactiveTickMarkColor: sliderTheme.disabledInactiveTickMarkColor ??
theme.colorScheme.onSurface.withOpacity(0.12f),
thumbColor: widget.activeColor ?? sliderTheme.thumbColor ?? theme.colorScheme.primary,
overlappingShapeStrokeColor: sliderTheme.overlappingShapeStrokeColor ?? theme.colorScheme.surface,
disabledThumbColor: sliderTheme.disabledThumbColor ?? theme.colorScheme.onSurface.withOpacity(0.38f),
overlayColor: widget.activeColor?.withOpacity(0.12f) ??
sliderTheme.overlayColor ?? theme.colorScheme.primary.withOpacity(0.12f),
valueIndicatorColor: widget.activeColor ?? sliderTheme.valueIndicatorColor ?? theme.colorScheme.primary,
rangeTrackShape: sliderTheme.rangeTrackShape ?? _defaultTrackShape,
rangeTickMarkShape: sliderTheme.rangeTickMarkShape ?? _defaultTickMarkShape,
rangeThumbShape: sliderTheme.rangeThumbShape ?? _defaultThumbShape,
overlayShape: sliderTheme.overlayShape ?? _defaultOverlayShape,
rangeValueIndicatorShape: sliderTheme.rangeValueIndicatorShape ?? _defaultValueIndicatorShape,
showValueIndicator: sliderTheme.showValueIndicator ?? _defaultShowValueIndicator,
valueIndicatorTextStyle: sliderTheme.valueIndicatorTextStyle ?? theme.textTheme.bodyText1.copyWith(
color: theme.colorScheme.onPrimary
),
minThumbSeparation: sliderTheme.minThumbSeparation ?? _defaultMinThumbSeparation,
thumbSelector: sliderTheme.thumbSelector ?? _defaultRangeThumbSelector
);
return(new _RangeSliderRenderObjectWidget(
values: _unlerpRangeValues(widget.values),
divisions: widget.divisions,
labels: widget.labels,
sliderTheme: sliderTheme,
textScaleFactor: MediaQuery.of(context).textScaleFactor,
onChanged: (widget.onChanged != null) && (widget.max > widget.min)
? _handleChanged
: (ValueChanged <RangeValues>)null,
onChangeStart: widget.onChangeStart != null ? _handleDragStart : (ValueChanged <RangeValues>)null,
onChangeEnd: widget.onChangeEnd != null ? _handleDragEnd : (ValueChanged <RangeValues>)null,
state: this
));
}
public abstract void paint(
PaintingContext context,
Offset offset,
RenderBox parentBox = null,
SliderThemeData sliderTheme = null,
Animation <float> enableAnimation = null,
Offset thumbCenter = null,
bool?isEnabled = null);
public SliderTheme(
Key key = null,
SliderThemeData data = null,
Widget child = null)
: base(key: key, child: child)
{
D.assert(child != null);
D.assert(data != null);
this.data = data;
}
public abstract void paint(
PaintingContext context,
Offset center,
Animation <float> activationAnimation = null,
Animation <float> enableAnimation = null,
bool?isDiscrete = null,
TextPainter labelPainter = null,
RenderBox parentBox = null,
SliderThemeData sliderTheme = null,
float?value = null);
public override void paint(
PaintingContext context,
Offset offset,
RenderBox parentBox = null,
SliderThemeData sliderTheme = null,
Animation <float> enableAnimation = null,
Offset thumbCenter = null,
bool?isEnabled = null,
bool?isDiscrete = null)
{
if (sliderTheme.trackHeight == 0)
{
return;
}
ColorTween activeTrackColorTween = new ColorTween(begin: sliderTheme.disabledActiveTrackColor,
end: sliderTheme.activeTrackColor);
ColorTween inactiveTrackColorTween = new ColorTween(begin: sliderTheme.disabledInactiveTrackColor,
end: sliderTheme.inactiveTrackColor);
Paint activePaint = new Paint {
color = activeTrackColorTween.evaluate(enableAnimation)
};
Paint inactivePaint = new Paint {
color = inactiveTrackColorTween.evaluate(enableAnimation)
};
Paint leftTrackPaint = activePaint;
Paint rightTrackPaint = inactivePaint;
float horizontalAdjustment = 0.0f;
if (!isEnabled.Value)
{
float disabledThumbRadius = sliderTheme.thumbShape.getPreferredSize(false, isDiscrete).width / 2.0f;
float gap = this.disabledThumbGapWidth * (1.0f - enableAnimation.value);
horizontalAdjustment = disabledThumbRadius + gap;
}
Rect trackRect = this.getPreferredRect(
parentBox: parentBox,
offset: offset,
sliderTheme: sliderTheme,
isEnabled: isEnabled,
isDiscrete: isDiscrete
);
Rect leftTrackSegment = Rect.fromLTRB(trackRect.left, trackRect.top, thumbCenter.dx - horizontalAdjustment,
trackRect.bottom);
context.canvas.drawRect(leftTrackSegment, leftTrackPaint);
Rect rightTrackSegment = Rect.fromLTRB(thumbCenter.dx + horizontalAdjustment, trackRect.top,
trackRect.right, trackRect.bottom);
context.canvas.drawRect(rightTrackSegment, rightTrackPaint);
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties)
{
base.debugFillProperties(properties);
ThemeData defaultTheme = ThemeData.fallback();
SliderThemeData defaultData = fromPrimaryColors(
primaryColor: defaultTheme.primaryColor,
primaryColorDark: defaultTheme.primaryColorDark,
primaryColorLight: defaultTheme.primaryColorLight,
valueIndicatorTextStyle: defaultTheme.accentTextTheme.body2
);
properties.add(new DiagnosticsProperty <Color>("activeTrackColor", this.activeTrackColor,
defaultValue: defaultData.activeTrackColor));
properties.add(new DiagnosticsProperty <Color>("activeTrackColor", this.activeTrackColor,
defaultValue: defaultData.activeTrackColor));
properties.add(new DiagnosticsProperty <Color>("inactiveTrackColor", this.inactiveTrackColor,
defaultValue: defaultData.inactiveTrackColor));
properties.add(new DiagnosticsProperty <Color>("disabledActiveTrackColor", this.disabledActiveTrackColor,
defaultValue: defaultData.disabledActiveTrackColor, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("disabledInactiveTrackColor", this.disabledInactiveTrackColor,
defaultValue: defaultData.disabledInactiveTrackColor, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("activeTickMarkColor", this.activeTickMarkColor,
defaultValue: defaultData.activeTickMarkColor, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("inactiveTickMarkColor", this.inactiveTickMarkColor,
defaultValue: defaultData.inactiveTickMarkColor, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("disabledActiveTickMarkColor",
this.disabledActiveTickMarkColor, defaultValue: defaultData.disabledActiveTickMarkColor,
level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("disabledInactiveTickMarkColor",
this.disabledInactiveTickMarkColor, defaultValue: defaultData.disabledInactiveTickMarkColor,
level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("thumbColor", this.thumbColor,
defaultValue: defaultData.thumbColor));
properties.add(new DiagnosticsProperty <Color>("disabledThumbColor", this.disabledThumbColor,
defaultValue: defaultData.disabledThumbColor, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("overlayColor", this.overlayColor,
defaultValue: defaultData.overlayColor, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <Color>("valueIndicatorColor", this.valueIndicatorColor,
defaultValue: defaultData.valueIndicatorColor));
properties.add(new DiagnosticsProperty <SliderTrackShape>("trackShape", this.trackShape,
defaultValue: defaultData.trackShape, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <SliderTickMarkShape>("tickMarkShape", this.tickMarkShape,
defaultValue: defaultData.tickMarkShape, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <SliderComponentShape>("thumbShape", this.thumbShape,
defaultValue: defaultData.thumbShape, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <SliderComponentShape>("overlayShape", this.overlayShape,
defaultValue: defaultData.overlayShape, level: DiagnosticLevel.debug));
properties.add(new DiagnosticsProperty <SliderComponentShape>("valueIndicatorShape",
this.valueIndicatorShape, defaultValue: defaultData.valueIndicatorShape, level: DiagnosticLevel.debug));
properties.add(new EnumProperty <ShowValueIndicator>("showValueIndicator", this.showValueIndicator,
defaultValue: defaultData.showValueIndicator));
properties.add(new DiagnosticsProperty <TextStyle>("valueIndicatorTextStyle", this.valueIndicatorTextStyle,
defaultValue: defaultData.valueIndicatorTextStyle));
}
Widget _buildMaterialSlider(BuildContext context)
{
ThemeData theme = Theme.of(context);
SliderThemeData sliderTheme = SliderTheme.of(context);
sliderTheme = sliderTheme.copyWith(
trackHeight: sliderTheme.trackHeight ?? _defaultTrackHeight,
activeTrackColor: widget.activeColor ?? sliderTheme.activeTrackColor ?? theme.colorScheme.primary,
inactiveTrackColor: widget.inactiveColor ?? sliderTheme.inactiveTrackColor ?? theme.colorScheme.primary.withOpacity(0.24f),
disabledActiveTrackColor: sliderTheme.disabledActiveTrackColor ?? theme.colorScheme.onSurface.withOpacity(0.32f),
disabledInactiveTrackColor: sliderTheme.disabledInactiveTrackColor ?? theme.colorScheme.onSurface.withOpacity(0.12f),
activeTickMarkColor: widget.inactiveColor ?? sliderTheme.activeTickMarkColor ?? theme.colorScheme.onPrimary.withOpacity(0.54f),
inactiveTickMarkColor: widget.activeColor ?? sliderTheme.inactiveTickMarkColor ?? theme.colorScheme.primary.withOpacity(0.54f),
disabledActiveTickMarkColor: sliderTheme.disabledActiveTickMarkColor ?? theme.colorScheme.onPrimary.withOpacity(0.12f),
disabledInactiveTickMarkColor: sliderTheme.disabledInactiveTickMarkColor ?? theme.colorScheme.onSurface.withOpacity(0.12f),
thumbColor: widget.activeColor ?? sliderTheme.thumbColor ?? theme.colorScheme.primary,
disabledThumbColor: sliderTheme.disabledThumbColor ?? theme.colorScheme.onSurface.withOpacity(0.38f),
overlayColor: widget.activeColor?.withOpacity(0.12f) ?? sliderTheme.overlayColor ?? theme.colorScheme.primary.withOpacity(0.12f),
valueIndicatorColor: widget.activeColor ?? sliderTheme.valueIndicatorColor ?? theme.colorScheme.primary,
trackShape: sliderTheme.trackShape ?? _defaultTrackShape,
tickMarkShape: sliderTheme.tickMarkShape ?? _defaultTickMarkShape,
thumbShape: sliderTheme.thumbShape ?? _defaultThumbShape,
overlayShape: sliderTheme.overlayShape ?? _defaultOverlayShape,
valueIndicatorShape: sliderTheme.valueIndicatorShape ?? _defaultValueIndicatorShape,
showValueIndicator: sliderTheme.showValueIndicator ?? _defaultShowValueIndicator,
valueIndicatorTextStyle: sliderTheme.valueIndicatorTextStyle ?? theme.textTheme.bodyText1.copyWith(
color: theme.colorScheme.onPrimary
)
);
return(new _SliderRenderObjectWidget(
value: _unlerp(widget.value),
divisions: widget.divisions,
label: widget.label,
sliderTheme: sliderTheme,
mediaQueryData: MediaQuery.of(context),
onChanged: (widget.onChanged != null) && (widget.max > widget.min) ? _handleChanged : (ValueChanged <float>)null,
onChangeStart: widget.onChangeStart != null ? _handleDragStart : (ValueChanged <float>)null,
onChangeEnd: widget.onChangeEnd != null ? _handleDragEnd : (ValueChanged <float>)null,
state: this
));
}
public override Rect getPreferredRect(
RenderBox parentBox = null,
Offset offset = null,
SliderThemeData sliderTheme = null,
bool?isEnabled = null,
bool?isDiscrete = null)
{
float overlayWidth = sliderTheme.overlayShape.getPreferredSize(isEnabled, isDiscrete).width;
float trackHeight = sliderTheme.trackHeight;
D.assert(overlayWidth >= 0);
D.assert(trackHeight >= 0);
D.assert(parentBox.size.width >= overlayWidth);
D.assert(parentBox.size.height >= trackHeight);
float trackLeft = offset.dx + overlayWidth / 2f;
float trackTop = offset.dy + (parentBox.size.height - trackHeight) / 2f;
float trackWidth = parentBox.size.width - overlayWidth;
return(Rect.fromLTWH(trackLeft, trackTop, trackWidth, trackHeight));
}
public _RangeSliderRenderObjectWidget(
Key key = null,
RangeValues values = null,
int?divisions = null,
RangeLabels labels = null,
SliderThemeData sliderTheme = null,
float textScaleFactor = 0f,
ValueChanged <RangeValues> onChanged = null,
ValueChanged <RangeValues> onChangeStart = null,
ValueChanged <RangeValues> onChangeEnd = null,
_RangeSliderState state = null) : base(key: key)
{
this.values = values;
this.divisions = divisions;
this.labels = labels;
this.sliderTheme = sliderTheme;
this.textScaleFactor = textScaleFactor;
this.onChanged = onChanged;
this.onChangeStart = onChangeStart;
this.onChangeEnd = onChangeEnd;
this.state = state;
}
public _SliderRenderObjectWidget(
Key key = null,
float?value = null,
int?divisions = null,
string label = null,
SliderThemeData sliderTheme = null,
MediaQueryData mediaQueryData = null,
ValueChanged <float> onChanged = null,
ValueChanged <float> onChangeStart = null,
ValueChanged <float> onChangeEnd = null,
_SliderState state = null
) : base(key: key)
{
this.value = value.Value;
this.divisions = divisions;
this.label = label;
this.sliderTheme = sliderTheme;
this.mediaQueryData = mediaQueryData;
this.onChanged = onChanged;
this.onChangeStart = onChangeStart;
this.onChangeEnd = onChangeEnd;
this.state = state;
}
public override Size getPreferredSize(
SliderThemeData sliderTheme = null,
bool?isEnabled = null)
{
return(Size.zero);
}
public _RenderRangeSlider(
RangeValues values,
int?divisions,
RangeLabels labels,
SliderThemeData sliderTheme,
ThemeData theme,
float textScaleFactor,
RuntimePlatform platform,
ValueChanged <RangeValues> onChanged,
ValueChanged <RangeValues> onChangeStart,
ValueChanged <RangeValues> onChangeEnd,
_RangeSliderState state,
TextDirection?textDirection)
{
D.assert(values != null);
D.assert(values.start >= 0.0 && values.start <= 1.0);
D.assert(values.end >= 0.0 && values.end <= 1.0);
D.assert(state != null);
D.assert(textDirection != null);
this.onChangeStart = onChangeStart;
this.onChangeEnd = onChangeEnd;
_platform = platform;
_labels = labels;
_values = values;
_divisions = divisions;
_sliderTheme = sliderTheme;
_theme = theme;
_textScaleFactor = textScaleFactor;
_onChanged = onChanged;
_state = state;
_textDirection = textDirection;
_updateLabelPainters();
GestureArenaTeam team = new GestureArenaTeam();
_drag = new HorizontalDragGestureRecognizer();
_drag.team = team;
_drag.onStart = _handleDragStart;
_drag.onUpdate = _handleDragUpdate;
_drag.onEnd = _handleDragEnd;
_drag.onCancel = _handleDragCancel;
_tap = new TapGestureRecognizer();
_tap.team = team;
_tap.onTapDown = _handleTapDown;
_tap.onTapUp = _handleTapUp;
_tap.onTapCancel = _handleTapCancel;
_overlayAnimation = new CurvedAnimation(
parent: _state.overlayController,
curve: Curves.fastOutSlowIn
);
_valueIndicatorAnimation = new CurvedAnimation(
parent: _state.valueIndicatorController,
curve: Curves.fastOutSlowIn
);
_enableAnimation = new CurvedAnimation(
parent: _state.enableController,
curve: Curves.easeInOut
);
}
public abstract Rect getPreferredRect(
RenderBox parentBox = null,
Offset offset = null,
SliderThemeData sliderTheme = null,
bool?isEnabled = null,
bool?isDiscrete = null);
public abstract Size getPreferredSize(
SliderThemeData sliderTheme = null,
bool?isEnabled = null);