您最多选择25个主题
主题必须以中文或者字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
813 行
29 KiB
813 行
29 KiB
using System;
|
|
using System.Collections.Generic;
|
|
using Unity.UIWidgets.animation;
|
|
using Unity.UIWidgets.async;
|
|
using Unity.UIWidgets.foundation;
|
|
using Unity.UIWidgets.gestures;
|
|
using Unity.UIWidgets.painting;
|
|
using Unity.UIWidgets.rendering;
|
|
using Unity.UIWidgets.scheduler2;
|
|
using Unity.UIWidgets.ui;
|
|
using Unity.UIWidgets.widgets;
|
|
using UnityEngine;
|
|
using Color = Unity.UIWidgets.ui.Color;
|
|
using Rect = Unity.UIWidgets.ui.Rect;
|
|
|
|
namespace Unity.UIWidgets.material {
|
|
public class Slider : StatefulWidget {
|
|
public Slider(
|
|
Key key = null,
|
|
float? value = null,
|
|
ValueChanged<float> onChanged = null,
|
|
ValueChanged<float> onChangeStart = null,
|
|
ValueChanged<float> onChangeEnd = null,
|
|
float min = 0.0f,
|
|
float max = 1.0f,
|
|
int? divisions = null,
|
|
string label = null,
|
|
Color activeColor = null,
|
|
Color inactiveColor = null
|
|
) : base(key: key) {
|
|
D.assert(value != null);
|
|
D.assert(min <= max);
|
|
D.assert(value >= min && value <= max);
|
|
D.assert(divisions == null || divisions > 0);
|
|
this.value = value.Value;
|
|
this.onChanged = onChanged;
|
|
this.onChangeStart = onChangeStart;
|
|
this.onChangeEnd = onChangeEnd;
|
|
this.min = min;
|
|
this.max = max;
|
|
this.divisions = divisions;
|
|
this.label = label;
|
|
this.activeColor = activeColor;
|
|
this.inactiveColor = inactiveColor;
|
|
}
|
|
|
|
public readonly float value;
|
|
|
|
public readonly ValueChanged<float> onChanged;
|
|
|
|
public readonly ValueChanged<float> onChangeStart;
|
|
|
|
public readonly ValueChanged<float> onChangeEnd;
|
|
|
|
public readonly float min;
|
|
|
|
public readonly float max;
|
|
|
|
public readonly int? divisions;
|
|
|
|
public readonly string label;
|
|
|
|
public readonly Color activeColor;
|
|
|
|
public readonly Color inactiveColor;
|
|
|
|
public override State createState() {
|
|
return new _SliderState();
|
|
}
|
|
|
|
|
|
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
|
|
base.debugFillProperties(properties);
|
|
properties.add(new FloatProperty("value", this.value));
|
|
properties.add(new FloatProperty("min", this.min));
|
|
properties.add(new FloatProperty("max", this.max));
|
|
}
|
|
}
|
|
|
|
|
|
class _SliderState : TickerProviderStateMixin<Slider> {
|
|
static TimeSpan enableAnimationDuration = new TimeSpan(0, 0, 0, 0, 75);
|
|
static TimeSpan valueIndicatorAnimationDuration = new TimeSpan(0, 0, 0, 0, 100);
|
|
|
|
public AnimationController overlayController;
|
|
public AnimationController valueIndicatorController;
|
|
public AnimationController enableController;
|
|
public AnimationController positionController;
|
|
public Timer interactionTimer;
|
|
|
|
public override void initState() {
|
|
base.initState();
|
|
this.overlayController = new AnimationController(
|
|
duration: Constants.kRadialReactionDuration,
|
|
vsync: this
|
|
);
|
|
this.valueIndicatorController = new AnimationController(
|
|
duration: valueIndicatorAnimationDuration,
|
|
vsync: this
|
|
);
|
|
this.enableController = new AnimationController(
|
|
duration: enableAnimationDuration,
|
|
vsync: this
|
|
);
|
|
this.positionController = new AnimationController(
|
|
duration: TimeSpan.Zero,
|
|
vsync: this
|
|
);
|
|
this.enableController.setValue(this.widget.onChanged != null ? 1.0f : 0.0f);
|
|
this.positionController.setValue(this._unlerp(this.widget.value));
|
|
}
|
|
|
|
public override void dispose() {
|
|
this.interactionTimer?.cancel();
|
|
this.overlayController.dispose();
|
|
this.valueIndicatorController.dispose();
|
|
this.enableController.dispose();
|
|
this.positionController.dispose();
|
|
base.dispose();
|
|
}
|
|
|
|
void _handleChanged(float value) {
|
|
D.assert(this.widget.onChanged != null);
|
|
float lerpValue = this._lerp(value);
|
|
if (lerpValue != this.widget.value) {
|
|
this.widget.onChanged(lerpValue);
|
|
}
|
|
}
|
|
|
|
void _handleDragStart(float value) {
|
|
D.assert(this.widget.onChangeStart != null);
|
|
this.widget.onChangeStart(this._lerp(value));
|
|
}
|
|
|
|
void _handleDragEnd(float value) {
|
|
D.assert(this.widget.onChangeEnd != null);
|
|
this.widget.onChangeEnd(this._lerp(value));
|
|
}
|
|
|
|
float _lerp(float value) {
|
|
D.assert(value >= 0.0f);
|
|
D.assert(value <= 1.0f);
|
|
return value * (this.widget.max - this.widget.min) + this.widget.min;
|
|
}
|
|
|
|
float _unlerp(float value) {
|
|
D.assert(value <= this.widget.max);
|
|
D.assert(value >= this.widget.min);
|
|
return this.widget.max > this.widget.min
|
|
? (value - this.widget.min) / (this.widget.max - this.widget.min)
|
|
: 0.0f;
|
|
}
|
|
|
|
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
|
|
);
|
|
}
|
|
}
|
|
|
|
class _SliderRenderObjectWidget : LeafRenderObjectWidget {
|
|
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 readonly float value;
|
|
public readonly int? divisions;
|
|
public readonly string label;
|
|
public readonly SliderThemeData sliderTheme;
|
|
public readonly MediaQueryData mediaQueryData;
|
|
public readonly ValueChanged<float> onChanged;
|
|
public readonly ValueChanged<float> onChangeStart;
|
|
public readonly ValueChanged<float> onChangeEnd;
|
|
public readonly _SliderState state;
|
|
|
|
public override RenderObject createRenderObject(BuildContext context) {
|
|
return new _RenderSlider(
|
|
value: this.value,
|
|
divisions: this.divisions,
|
|
label: this.label,
|
|
sliderTheme: this.sliderTheme,
|
|
theme: Theme.of(context),
|
|
mediaQueryData: this.mediaQueryData,
|
|
onChanged: this.onChanged,
|
|
onChangeStart: this.onChangeStart,
|
|
onChangeEnd: this.onChangeEnd,
|
|
state: this.state,
|
|
platform: Theme.of(context).platform
|
|
);
|
|
}
|
|
|
|
|
|
public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
|
|
_RenderSlider _renderObject = (_RenderSlider) renderObject;
|
|
_renderObject.value = this.value;
|
|
_renderObject.divisions = this.divisions;
|
|
_renderObject.label = this.label;
|
|
_renderObject.sliderTheme = this.sliderTheme;
|
|
_renderObject.theme = Theme.of(context);
|
|
_renderObject.mediaQueryData = this.mediaQueryData;
|
|
_renderObject.onChanged = this.onChanged;
|
|
_renderObject.onChangeStart = this.onChangeStart;
|
|
_renderObject.onChangeEnd = this.onChangeEnd;
|
|
_renderObject.platform = Theme.of(context).platform;
|
|
}
|
|
}
|
|
|
|
class _RenderSlider : RenderBox {
|
|
static float _positionAnimationDurationMilliSeconds = 75;
|
|
static float _minimumInteractionTimeMilliSeconds = 500;
|
|
|
|
const float _minPreferredTrackWidth = 144.0f;
|
|
|
|
public _RenderSlider(
|
|
float? value = null,
|
|
int? divisions = null,
|
|
string label = null,
|
|
SliderThemeData sliderTheme = null,
|
|
ThemeData theme = null,
|
|
MediaQueryData mediaQueryData = null,
|
|
RuntimePlatform? platform = null,
|
|
ValueChanged<float> onChanged = null,
|
|
ValueChanged<float> onChangeStart = null,
|
|
ValueChanged<float> onChangeEnd = null,
|
|
_SliderState state = null
|
|
) {
|
|
D.assert(value != null && value >= 0.0 && value <= 1.0);
|
|
D.assert(state != null);
|
|
this.onChangeStart = onChangeStart;
|
|
this.onChangeEnd = onChangeEnd;
|
|
this._platform = platform;
|
|
this._label = label;
|
|
this._value = value.Value;
|
|
this._divisions = divisions;
|
|
this._sliderTheme = sliderTheme;
|
|
this._theme = theme;
|
|
this._mediaQueryData = mediaQueryData;
|
|
this._onChanged = onChanged;
|
|
this._state = state;
|
|
|
|
this._updateLabelPainter();
|
|
GestureArenaTeam team = new GestureArenaTeam();
|
|
this._drag = new HorizontalDragGestureRecognizer {
|
|
team = team,
|
|
onStart = this._handleDragStart,
|
|
onUpdate = this._handleDragUpdate,
|
|
onEnd = this._handleDragEnd,
|
|
onCancel = this._endInteraction
|
|
};
|
|
|
|
this._tap = new TapGestureRecognizer {
|
|
team = team,
|
|
onTapDown = this._handleTapDown,
|
|
onTapUp = this._handleTapUp,
|
|
onTapCancel = this._endInteraction
|
|
};
|
|
|
|
this._overlayAnimation = new CurvedAnimation(
|
|
parent: this._state.overlayController,
|
|
curve: Curves.fastOutSlowIn);
|
|
|
|
this._valueIndicatorAnimation = new CurvedAnimation(
|
|
parent: this._state.valueIndicatorController,
|
|
curve: Curves.fastOutSlowIn);
|
|
|
|
this._enableAnimation = new CurvedAnimation(
|
|
parent: this._state.enableController,
|
|
curve: Curves.easeInOut);
|
|
}
|
|
|
|
float _maxSliderPartWidth {
|
|
get {
|
|
float maxValue = 0;
|
|
foreach (Size size in this._sliderPartSizes) {
|
|
if (size.width > maxValue) {
|
|
maxValue = size.width;
|
|
}
|
|
}
|
|
|
|
return maxValue;
|
|
}
|
|
}
|
|
|
|
float _maxSliderPartHeight {
|
|
get {
|
|
float maxValue = 0;
|
|
foreach (Size size in this._sliderPartSizes) {
|
|
if (size.width > maxValue) {
|
|
maxValue = size.width;
|
|
}
|
|
}
|
|
|
|
return maxValue;
|
|
}
|
|
}
|
|
|
|
List<Size> _sliderPartSizes {
|
|
get {
|
|
return new List<Size> {
|
|
this._sliderTheme.overlayShape.getPreferredSize(this.isInteractive, this.isDiscrete),
|
|
this._sliderTheme.thumbShape.getPreferredSize(this.isInteractive, this.isDiscrete),
|
|
this._sliderTheme.tickMarkShape.getPreferredSize(isEnabled: this.isInteractive,
|
|
sliderTheme: this.sliderTheme)
|
|
};
|
|
}
|
|
}
|
|
|
|
float _minPreferredTrackHeight {
|
|
get { return this._sliderTheme.trackHeight; }
|
|
}
|
|
|
|
_SliderState _state;
|
|
Animation<float> _overlayAnimation;
|
|
Animation<float> _valueIndicatorAnimation;
|
|
Animation<float> _enableAnimation;
|
|
TextPainter _labelPainter = new TextPainter();
|
|
HorizontalDragGestureRecognizer _drag;
|
|
TapGestureRecognizer _tap;
|
|
bool _active = false;
|
|
float _currentDragValue = 0.0f;
|
|
|
|
Rect _trackRect {
|
|
get {
|
|
return this._sliderTheme.trackShape.getPreferredRect(
|
|
parentBox: this,
|
|
offset: Offset.zero,
|
|
sliderTheme: this._sliderTheme,
|
|
isDiscrete: false
|
|
);
|
|
}
|
|
}
|
|
|
|
bool isInteractive {
|
|
get { return this.onChanged != null; }
|
|
}
|
|
|
|
bool isDiscrete {
|
|
get { return this.divisions != null && this.divisions.Value > 0; }
|
|
}
|
|
|
|
public float value {
|
|
get { return this._value; }
|
|
set {
|
|
D.assert(value >= 0.0f && value <= 1.0f);
|
|
float convertedValue = this.isDiscrete ? this._discretize(value) : value;
|
|
if (convertedValue == this._value) {
|
|
return;
|
|
}
|
|
|
|
this._value = convertedValue;
|
|
if (this.isDiscrete) {
|
|
float distance = (this._value - this._state.positionController.value).abs();
|
|
this._state.positionController.duration = distance != 0.0f
|
|
? new TimeSpan(0, 0, 0, 0, (int) (_positionAnimationDurationMilliSeconds * (1.0f / distance)))
|
|
: TimeSpan.Zero;
|
|
this._state.positionController.animateTo(convertedValue, curve: Curves.easeInOut);
|
|
}
|
|
else {
|
|
this._state.positionController.setValue(convertedValue);
|
|
}
|
|
}
|
|
}
|
|
|
|
float _value;
|
|
|
|
public RuntimePlatform? platform {
|
|
get { return this._platform; }
|
|
set {
|
|
if (this._platform == value) {
|
|
return;
|
|
}
|
|
|
|
this._platform = value;
|
|
}
|
|
}
|
|
|
|
RuntimePlatform? _platform;
|
|
|
|
public int? divisions {
|
|
get { return this._divisions; }
|
|
set {
|
|
if (value == this._divisions) {
|
|
return;
|
|
}
|
|
|
|
this._divisions = value;
|
|
this.markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
int? _divisions;
|
|
|
|
public string label {
|
|
get { return this._label; }
|
|
set {
|
|
if (value == this._label) {
|
|
return;
|
|
}
|
|
|
|
this._label = value;
|
|
this._updateLabelPainter();
|
|
}
|
|
}
|
|
|
|
string _label;
|
|
|
|
public SliderThemeData sliderTheme {
|
|
get { return this._sliderTheme; }
|
|
set {
|
|
if (value == this._sliderTheme) {
|
|
return;
|
|
}
|
|
|
|
this._sliderTheme = value;
|
|
this.markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
SliderThemeData _sliderTheme;
|
|
|
|
public ThemeData theme {
|
|
get { return this._theme; }
|
|
set {
|
|
if (value == this._theme) {
|
|
return;
|
|
}
|
|
|
|
this._theme = value;
|
|
this.markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
ThemeData _theme;
|
|
|
|
public MediaQueryData mediaQueryData {
|
|
get { return this._mediaQueryData; }
|
|
set {
|
|
if (value == this._mediaQueryData) {
|
|
return;
|
|
}
|
|
|
|
this._mediaQueryData = value;
|
|
this._updateLabelPainter();
|
|
}
|
|
}
|
|
|
|
MediaQueryData _mediaQueryData;
|
|
|
|
public ValueChanged<float> onChanged {
|
|
get { return this._onChanged; }
|
|
set {
|
|
if (value == this._onChanged) {
|
|
return;
|
|
}
|
|
|
|
bool wasInteractive = this.isInteractive;
|
|
this._onChanged = value;
|
|
if (wasInteractive != this.isInteractive) {
|
|
if (this.isInteractive) {
|
|
this._state.enableController.forward();
|
|
}
|
|
else {
|
|
this._state.enableController.reverse();
|
|
}
|
|
|
|
this.markNeedsPaint();
|
|
}
|
|
}
|
|
}
|
|
|
|
ValueChanged<float> _onChanged;
|
|
|
|
public ValueChanged<float> onChangeStart;
|
|
public ValueChanged<float> onChangeEnd;
|
|
|
|
public bool showValueIndicator {
|
|
get {
|
|
bool showValueIndicator = false;
|
|
switch (this._sliderTheme.showValueIndicator) {
|
|
case ShowValueIndicator.onlyForDiscrete:
|
|
showValueIndicator = this.isDiscrete;
|
|
break;
|
|
case ShowValueIndicator.onlyForContinuous:
|
|
showValueIndicator = !this.isDiscrete;
|
|
break;
|
|
case ShowValueIndicator.always:
|
|
showValueIndicator = true;
|
|
break;
|
|
case ShowValueIndicator.never:
|
|
showValueIndicator = false;
|
|
break;
|
|
}
|
|
|
|
return showValueIndicator;
|
|
}
|
|
}
|
|
|
|
float _adjustmentUnit {
|
|
get {
|
|
switch (this._platform) {
|
|
case RuntimePlatform.IPhonePlayer:
|
|
return 0.1f;
|
|
default:
|
|
return 0.05f;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void _updateLabelPainter() {
|
|
if (this.label != null) {
|
|
this._labelPainter.text = new TextSpan(
|
|
style: this._sliderTheme.valueIndicatorTextStyle,
|
|
text: this.label
|
|
);
|
|
this._labelPainter.textScaleFactor = this._mediaQueryData.textScaleFactor;
|
|
this._labelPainter.layout();
|
|
}
|
|
else {
|
|
this._labelPainter.text = null;
|
|
}
|
|
|
|
this.markNeedsLayout();
|
|
}
|
|
|
|
public override void attach(object owner) {
|
|
base.attach(owner);
|
|
this._overlayAnimation.addListener(this.markNeedsPaint);
|
|
this._valueIndicatorAnimation.addListener(this.markNeedsPaint);
|
|
this._enableAnimation.addListener(this.markNeedsPaint);
|
|
this._state.positionController.addListener(this.markNeedsPaint);
|
|
}
|
|
|
|
public override void detach() {
|
|
this._overlayAnimation.removeListener(this.markNeedsPaint);
|
|
this._valueIndicatorAnimation.removeListener(this.markNeedsPaint);
|
|
this._enableAnimation.removeListener(this.markNeedsPaint);
|
|
this._state.positionController.removeListener(this.markNeedsPaint);
|
|
base.detach();
|
|
}
|
|
|
|
float _getValueFromVisualPosition(float visualPosition) {
|
|
return visualPosition;
|
|
}
|
|
|
|
float _getValueFromGlobalPosition(Offset globalPosition) {
|
|
float visualPosition =
|
|
(this.globalToLocal(globalPosition).dx - this._trackRect.left) / this._trackRect.width;
|
|
return this._getValueFromVisualPosition(visualPosition);
|
|
}
|
|
|
|
float _discretize(float value) {
|
|
float result = value.clamp(0.0f, 1.0f);
|
|
if (this.isDiscrete) {
|
|
result = (result * this.divisions.Value).round() * 1.0f / this.divisions.Value;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void _startInteraction(Offset globalPosition) {
|
|
if (this.isInteractive) {
|
|
this._active = true;
|
|
|
|
if (this.onChangeStart != null) {
|
|
this.onChangeStart(this._discretize(this.value));
|
|
}
|
|
|
|
this._currentDragValue = this._getValueFromGlobalPosition(globalPosition);
|
|
this.onChanged(this._discretize(this._currentDragValue));
|
|
this._state.overlayController.forward();
|
|
if (this.showValueIndicator) {
|
|
this._state.valueIndicatorController.forward();
|
|
this._state.interactionTimer?.cancel();
|
|
this._state.interactionTimer = Window.instance.run(
|
|
new TimeSpan(0, 0, 0, 0,
|
|
(int) (_minimumInteractionTimeMilliSeconds * scheduler_.timeDilation)),
|
|
() => {
|
|
this._state.interactionTimer = null;
|
|
if (!this._active &&
|
|
this._state.valueIndicatorController.status == AnimationStatus.completed) {
|
|
this._state.valueIndicatorController.reverse();
|
|
}
|
|
}
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
void _endInteraction() {
|
|
if (this._active && this._state.mounted) {
|
|
if (this.onChangeEnd != null) {
|
|
this.onChangeEnd(this._discretize(this._currentDragValue));
|
|
}
|
|
|
|
this._active = false;
|
|
this._currentDragValue = 0.0f;
|
|
this._state.overlayController.reverse();
|
|
if (this.showValueIndicator && this._state.interactionTimer == null) {
|
|
this._state.valueIndicatorController.reverse();
|
|
}
|
|
}
|
|
}
|
|
|
|
void _handleDragStart(DragStartDetails details) {
|
|
this._startInteraction(details.globalPosition);
|
|
}
|
|
|
|
void _handleDragUpdate(DragUpdateDetails details) {
|
|
if (this.isInteractive) {
|
|
float valueDelta = details.primaryDelta.Value / this._trackRect.width;
|
|
this._currentDragValue += valueDelta;
|
|
this.onChanged(this._discretize(this._currentDragValue));
|
|
}
|
|
}
|
|
|
|
void _handleDragEnd(DragEndDetails details) {
|
|
this._endInteraction();
|
|
}
|
|
|
|
void _handleTapDown(TapDownDetails details) {
|
|
this._startInteraction(details.globalPosition);
|
|
}
|
|
|
|
void _handleTapUp(TapUpDetails details) {
|
|
this._endInteraction();
|
|
}
|
|
|
|
protected override bool hitTestSelf(Offset position) {
|
|
return true;
|
|
}
|
|
|
|
public override void handleEvent(PointerEvent evt, HitTestEntry entry) {
|
|
D.assert(this.debugHandleEvent(evt, entry));
|
|
if (evt is PointerDownEvent && this.isInteractive) {
|
|
this._drag.addPointer((PointerDownEvent) evt);
|
|
this._tap.addPointer((PointerDownEvent) evt);
|
|
}
|
|
}
|
|
|
|
|
|
protected override float computeMinIntrinsicWidth(float height) {
|
|
return _minPreferredTrackWidth + this._maxSliderPartWidth;
|
|
}
|
|
|
|
protected override float computeMaxIntrinsicWidth(float height) {
|
|
return _minPreferredTrackWidth + this._maxSliderPartWidth;
|
|
}
|
|
|
|
protected override float computeMinIntrinsicHeight(float width) {
|
|
return Mathf.Max(this._minPreferredTrackHeight, this._maxSliderPartHeight);
|
|
}
|
|
|
|
protected internal override float computeMaxIntrinsicHeight(float width) {
|
|
return Mathf.Max(this._minPreferredTrackHeight, this._maxSliderPartHeight);
|
|
}
|
|
|
|
protected override bool sizedByParent {
|
|
get { return true; }
|
|
}
|
|
|
|
protected override void performResize() {
|
|
this.size = new Size(
|
|
this.constraints.hasBoundedWidth
|
|
? this.constraints.maxWidth
|
|
: _minPreferredTrackWidth + this._maxSliderPartWidth,
|
|
this.constraints.hasBoundedHeight
|
|
? this.constraints.maxHeight
|
|
: Mathf.Max(this._minPreferredTrackHeight, this._maxSliderPartHeight)
|
|
);
|
|
}
|
|
|
|
public override void paint(PaintingContext context, Offset offset) {
|
|
float value = this._state.positionController.value;
|
|
float visualPosition = value;
|
|
|
|
Rect trackRect = this._sliderTheme.trackShape.getPreferredRect(
|
|
parentBox: this,
|
|
offset: offset,
|
|
sliderTheme: this._sliderTheme,
|
|
isDiscrete: this.isDiscrete
|
|
);
|
|
|
|
Offset thumbCenter = new Offset(trackRect.left + visualPosition * trackRect.width, trackRect.center.dy);
|
|
|
|
this._sliderTheme.trackShape.paint(
|
|
context,
|
|
offset,
|
|
parentBox: this,
|
|
sliderTheme: this._sliderTheme,
|
|
enableAnimation: this._enableAnimation,
|
|
thumbCenter: thumbCenter,
|
|
isDiscrete: this.isDiscrete,
|
|
isEnabled: this.isInteractive
|
|
);
|
|
|
|
if (!this._overlayAnimation.isDismissed) {
|
|
this._sliderTheme.overlayShape.paint(
|
|
context,
|
|
thumbCenter,
|
|
activationAnimation: this._overlayAnimation,
|
|
enableAnimation: this._enableAnimation,
|
|
isDiscrete: this.isDiscrete,
|
|
labelPainter: this._labelPainter,
|
|
parentBox: this,
|
|
sliderTheme: this._sliderTheme,
|
|
value: this._value
|
|
);
|
|
}
|
|
|
|
if (this.isDiscrete) {
|
|
float tickMarkWidth = this._sliderTheme.tickMarkShape.getPreferredSize(
|
|
isEnabled: this.isInteractive,
|
|
sliderTheme: this._sliderTheme
|
|
).width;
|
|
|
|
float adjustedTrackWidth = trackRect.width - tickMarkWidth;
|
|
if (adjustedTrackWidth / this.divisions.Value >= 3.0f * tickMarkWidth) {
|
|
float dy = trackRect.center.dy;
|
|
for (int i = 0; i <= this.divisions; i++) {
|
|
float tickValue = i / this.divisions.Value;
|
|
float dx = trackRect.left + tickValue * adjustedTrackWidth + tickMarkWidth / 2;
|
|
Offset tickMarkOffset = new Offset(dx, dy);
|
|
this._sliderTheme.tickMarkShape.paint(
|
|
context,
|
|
tickMarkOffset,
|
|
parentBox: this,
|
|
sliderTheme: this._sliderTheme,
|
|
enableAnimation: this._enableAnimation,
|
|
thumbCenter: thumbCenter,
|
|
isEnabled: this.isInteractive
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (this.isInteractive && this.label != null && !this._valueIndicatorAnimation.isDismissed) {
|
|
if (this.showValueIndicator) {
|
|
this._sliderTheme.valueIndicatorShape.paint(
|
|
context,
|
|
thumbCenter,
|
|
activationAnimation: this._valueIndicatorAnimation,
|
|
enableAnimation: this._enableAnimation,
|
|
isDiscrete: this.isDiscrete,
|
|
labelPainter: this._labelPainter,
|
|
parentBox: this,
|
|
sliderTheme: this._sliderTheme,
|
|
value: this._value
|
|
);
|
|
}
|
|
}
|
|
|
|
this._sliderTheme.thumbShape.paint(
|
|
context,
|
|
thumbCenter,
|
|
activationAnimation: this._valueIndicatorAnimation,
|
|
enableAnimation: this._enableAnimation,
|
|
isDiscrete: this.isDiscrete,
|
|
labelPainter: this._labelPainter,
|
|
parentBox: this,
|
|
sliderTheme: this._sliderTheme,
|
|
value: this._value
|
|
);
|
|
}
|
|
}
|
|
}
|