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771 行
29 KiB
771 行
29 KiB
using System.Collections.Generic;
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using uiwidgets;
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using Unity.UIWidgets.foundation;
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using Unity.UIWidgets.gestures;
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using Unity.UIWidgets.painting;
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using Unity.UIWidgets.rendering;
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using Unity.UIWidgets.ui;
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using Unity.UIWidgets.widgets;
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namespace Unity.UIWidgets.material {
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enum _SwitchType {
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material,
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adaptive
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}
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public class Switch : StatefulWidget {
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internal const float _kTrackHeight = 14.0f;
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internal const float _kTrackWidth = 33.0f;
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internal const float _kTrackRadius = _kTrackHeight / 2.0f;
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internal const float _kThumbRadius = 10.0f;
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internal const float _kSwitchWidth = _kTrackWidth - 2 * _kTrackRadius + 2 * material_.kRadialReactionRadius;
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internal const float _kSwitchHeight = 2 * material_.kRadialReactionRadius + 8.0f;
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internal const float _kSwitchHeightCollapsed = 2 * material_.kRadialReactionRadius;
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public Switch(
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Key key = null,
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bool? value = null,
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ValueChanged<bool?> onChanged = null,
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Color activeColor = null,
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Color activeTrackColor = null,
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Color inactiveThumbColor = null,
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Color inactiveTrackColor = null,
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ImageProvider activeThumbImage = null,
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ImageErrorListener onActiveThumbImageError = null,
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ImageProvider inactiveThumbImage = null,
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ImageErrorListener onInactiveThumbImageError = null,
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MaterialTapTargetSize? materialTapTargetSize = null,
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DragStartBehavior dragStartBehavior = DragStartBehavior.start,
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Color focusColor = null,
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Color hoverColor = null,
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FocusNode focusNode = null,
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bool autofocus = false
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) : this(
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key: key,
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value: value,
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onChanged: onChanged,
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activeColor: activeColor,
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activeTrackColor: activeTrackColor,
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inactiveThumbColor: inactiveThumbColor,
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inactiveTrackColor: inactiveTrackColor,
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activeThumbImage: activeThumbImage,
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onActiveThumbImageError: onActiveThumbImageError,
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inactiveThumbImage: inactiveThumbImage,
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onInactiveThumbImageError: onInactiveThumbImageError,
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materialTapTargetSize: materialTapTargetSize,
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switchType: _SwitchType.material,
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dragStartBehavior: dragStartBehavior,
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focusColor: focusColor,
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hoverColor: hoverColor,
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focusNode: focusNode,
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autofocus: autofocus
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) {
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}
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Switch(
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Key key = null,
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bool? value = null,
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ValueChanged<bool?> onChanged = null,
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Color activeColor = null,
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Color activeTrackColor = null,
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Color inactiveThumbColor = null,
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Color inactiveTrackColor = null,
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ImageProvider activeThumbImage = null,
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ImageErrorListener onActiveThumbImageError = null,
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ImageProvider inactiveThumbImage = null,
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ImageErrorListener onInactiveThumbImageError = null,
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MaterialTapTargetSize? materialTapTargetSize = null,
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_SwitchType switchType = _SwitchType.material,
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DragStartBehavior dragStartBehavior = DragStartBehavior.start,
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Color focusColor = null,
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Color hoverColor = null,
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FocusNode focusNode = null,
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bool autofocus = false
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) : base(key: key) {
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D.assert(value != null);
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this.value = value.Value;
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D.assert(activeThumbImage != null || onActiveThumbImageError == null);
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D.assert(inactiveThumbImage != null || onInactiveThumbImageError == null);
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this.onChanged = onChanged;
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this.activeColor = activeColor;
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this.activeTrackColor = activeTrackColor;
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this.inactiveThumbColor = inactiveThumbColor;
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this.inactiveTrackColor = inactiveTrackColor;
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this.activeThumbImage = activeThumbImage;
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this.onActiveThumbImageError = onActiveThumbImageError;
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this.inactiveThumbImage = inactiveThumbImage;
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this.onInactiveThumbImageError = onInactiveThumbImageError;
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this.materialTapTargetSize = materialTapTargetSize;
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_switchType = switchType;
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this.dragStartBehavior = dragStartBehavior;
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this.focusColor = focusColor;
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this.hoverColor = hoverColor;
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this.focusNode = focusNode;
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this.autofocus = autofocus;
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}
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public static Switch adaptive(
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Key key = null,
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bool? value = null,
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ValueChanged<bool?> onChanged = null,
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Color activeColor = null,
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Color activeTrackColor = null,
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Color inactiveThumbColor = null,
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Color inactiveTrackColor = null,
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ImageProvider activeThumbImage = null,
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ImageErrorListener onActiveThumbImageError = null,
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ImageProvider inactiveThumbImage = null,
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ImageErrorListener onInactiveThumbImageError = null,
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MaterialTapTargetSize? materialTapTargetSize = null,
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DragStartBehavior dragStartBehavior = DragStartBehavior.start,
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Color focusColor = null,
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Color hoverColor = null,
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FocusNode focusNode = null,
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bool autofocus = false
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) {
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return new Switch(key: key,
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value: value,
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onChanged: onChanged,
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activeColor: activeColor,
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activeTrackColor: activeTrackColor,
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inactiveThumbColor: inactiveThumbColor,
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inactiveTrackColor: inactiveTrackColor,
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activeThumbImage: activeThumbImage,
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onActiveThumbImageError: onActiveThumbImageError,
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inactiveThumbImage: inactiveThumbImage,
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onInactiveThumbImageError: onInactiveThumbImageError,
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materialTapTargetSize: materialTapTargetSize,
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switchType: _SwitchType.adaptive,
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dragStartBehavior: dragStartBehavior,
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focusColor: focusColor,
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hoverColor: hoverColor,
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focusNode: focusNode,
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autofocus: autofocus
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);
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}
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public readonly bool value;
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public readonly ValueChanged<bool?> onChanged;
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public readonly Color activeColor;
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public readonly Color activeTrackColor;
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public readonly Color inactiveThumbColor;
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public readonly Color inactiveTrackColor;
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public readonly ImageProvider activeThumbImage;
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public readonly ImageErrorListener onActiveThumbImageError;
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public readonly ImageProvider inactiveThumbImage;
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public readonly ImageErrorListener onInactiveThumbImageError;
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public readonly MaterialTapTargetSize? materialTapTargetSize;
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internal readonly _SwitchType _switchType;
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public readonly DragStartBehavior dragStartBehavior;
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public readonly Color focusColor;
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public readonly Color hoverColor;
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public readonly FocusNode focusNode;
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public readonly bool autofocus;
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public override State createState() {
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return new _SwitchState();
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}
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public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
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base.debugFillProperties(properties);
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properties.add(new FlagProperty("value", value: value, ifTrue: "on", ifFalse: "off", showName: true));
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properties.add(
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new ObjectFlagProperty<ValueChanged<bool?>>("onChanged", onChanged, ifNull: "disabled"));
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}
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}
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class _SwitchState : TickerProviderStateMixin<Switch> {
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Dictionary<LocalKey, ActionFactory> _actionMap;
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public override void initState() {
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base.initState();
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_actionMap = new Dictionary<LocalKey, ActionFactory>();
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_actionMap[ActivateAction.key] = _createAction;
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}
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void _actionHandler(FocusNode node, Intent intent) {
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if (widget.onChanged != null) {
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widget.onChanged(!widget.value);
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}
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RenderObject renderObject = node.context.findRenderObject();
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}
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UiWidgetAction _createAction() {
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return new CallbackAction(
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ActivateAction.key,
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onInvoke: _actionHandler
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);
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}
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bool _focused = false;
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void _handleFocusHighlightChanged(bool focused) {
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if (focused != _focused) {
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setState(() => { _focused = focused; });
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}
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}
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bool _hovering = false;
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void _handleHoverChanged(bool hovering) {
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if (hovering != _hovering) {
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setState(() => { _hovering = hovering; });
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}
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}
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Size getSwitchSize(ThemeData theme) {
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switch (widget.materialTapTargetSize ?? theme.materialTapTargetSize) {
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case MaterialTapTargetSize.padded:
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return new Size(Switch._kSwitchWidth, Switch._kSwitchHeight);
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case MaterialTapTargetSize.shrinkWrap:
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return new Size(Switch._kSwitchWidth, Switch._kSwitchHeightCollapsed);
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}
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D.assert(false);
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return null;
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}
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bool enabled {
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get { return widget.onChanged != null; }
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}
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internal void _didFinishDragging() {
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setState(() => { });
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}
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Widget buildMaterialSwitch(BuildContext context) {
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D.assert(material_.debugCheckHasMaterial(context));
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ThemeData theme = Theme.of(context);
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bool isDark = theme.brightness == Brightness.dark;
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Color activeThumbColor = widget.activeColor ?? theme.toggleableActiveColor;
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Color activeTrackColor = widget.activeTrackColor ?? activeThumbColor.withAlpha(0x80);
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Color hoverColor = widget.hoverColor ?? theme.hoverColor;
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Color focusColor = widget.focusColor ?? theme.focusColor;
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Color inactiveThumbColor;
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Color inactiveTrackColor;
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if (enabled) {
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Color black32 = new Color(0x52000000);
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inactiveThumbColor = widget.inactiveThumbColor ??
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(isDark ? Colors.grey.shade400 : Colors.grey.shade50);
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inactiveTrackColor = widget.inactiveTrackColor ?? (isDark ? Colors.white30 : black32);
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}
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else {
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inactiveThumbColor = widget.inactiveThumbColor ??
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(isDark ? Colors.grey.shade800 : Colors.grey.shade400);
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inactiveTrackColor = widget.inactiveTrackColor ?? (isDark ? Colors.white10 : Colors.black12);
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}
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return new FocusableActionDetector(
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actions: _actionMap,
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focusNode: widget.focusNode,
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autofocus: widget.autofocus,
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enabled: enabled,
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onShowFocusHighlight: _handleFocusHighlightChanged,
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onShowHoverHighlight: _handleHoverChanged,
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child: new Builder(
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builder: (BuildContext subContext) => {
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return new _SwitchRenderObjectWidget(
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dragStartBehavior: widget.dragStartBehavior,
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value: widget.value,
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activeColor: activeThumbColor,
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inactiveColor: inactiveThumbColor,
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hoverColor: hoverColor,
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focusColor: focusColor,
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activeThumbImage: widget.activeThumbImage,
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onActiveThumbImageError: widget.onActiveThumbImageError,
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inactiveThumbImage: widget.inactiveThumbImage,
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onInactiveThumbImageError: widget.onInactiveThumbImageError,
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activeTrackColor: activeTrackColor,
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inactiveTrackColor: inactiveTrackColor,
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configuration: ImageUtils.createLocalImageConfiguration(subContext),
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onChanged: widget.onChanged,
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additionalConstraints: BoxConstraints.tight(getSwitchSize(theme)),
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hasFocus: _focused,
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hovering: _hovering,
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state: this
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);
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}
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)
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);
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}
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public override Widget build(BuildContext context) {
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switch (widget._switchType) {
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case _SwitchType.material:
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return buildMaterialSwitch(context);
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case _SwitchType.adaptive: {
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return buildMaterialSwitch(context);
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}
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}
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D.assert(false);
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return null;
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}
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}
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class _SwitchRenderObjectWidget : LeafRenderObjectWidget {
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public _SwitchRenderObjectWidget(
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Key key = null,
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bool? value = null,
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Color activeColor = null,
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Color inactiveColor = null,
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Color hoverColor = null,
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Color focusColor = null,
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ImageProvider activeThumbImage = null,
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ImageErrorListener onActiveThumbImageError = null,
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ImageProvider inactiveThumbImage = null,
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ImageErrorListener onInactiveThumbImageError = null,
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Color activeTrackColor = null,
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Color inactiveTrackColor = null,
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ImageConfiguration configuration = null,
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ValueChanged<bool?> onChanged = null,
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BoxConstraints additionalConstraints = null,
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DragStartBehavior? dragStartBehavior = null,
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bool hasFocus = false,
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bool hovering = false,
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_SwitchState state = null
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) : base(key: key) {
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D.assert(value != null);
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this.value = value.Value;
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this.activeColor = activeColor;
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this.inactiveColor = inactiveColor;
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this.hoverColor = hoverColor;
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this.focusColor = focusColor;
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this.activeThumbImage = activeThumbImage;
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this.onActiveThumbImageError = onActiveThumbImageError;
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this.inactiveThumbImage = inactiveThumbImage;
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this.onInactiveThumbImageError = onInactiveThumbImageError;
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this.activeTrackColor = activeTrackColor;
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this.inactiveTrackColor = inactiveTrackColor;
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this.configuration = configuration;
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this.onChanged = onChanged;
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this.additionalConstraints = additionalConstraints;
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this.dragStartBehavior = dragStartBehavior;
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this.hasFocus = hasFocus;
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this.hovering = hovering;
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this.state = state;
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}
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public readonly bool value;
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public readonly Color activeColor;
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public readonly Color inactiveColor;
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public readonly Color hoverColor;
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public readonly Color focusColor;
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public readonly ImageProvider activeThumbImage;
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public readonly ImageErrorListener onActiveThumbImageError;
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public readonly ImageProvider inactiveThumbImage;
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public readonly ImageErrorListener onInactiveThumbImageError;
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public readonly Color activeTrackColor;
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public readonly Color inactiveTrackColor;
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public readonly ImageConfiguration configuration;
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public readonly ValueChanged<bool?> onChanged;
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public readonly BoxConstraints additionalConstraints;
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public readonly DragStartBehavior? dragStartBehavior;
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public readonly bool hasFocus;
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public readonly bool hovering;
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public readonly _SwitchState state;
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public override RenderObject createRenderObject(BuildContext context) {
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return new _RenderSwitch(
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dragStartBehavior: dragStartBehavior,
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value: value,
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activeColor: activeColor,
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inactiveColor: inactiveColor,
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hoverColor: hoverColor,
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focusColor: focusColor,
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activeThumbImage: activeThumbImage,
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onActiveThumbImageError: onActiveThumbImageError,
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inactiveThumbImage: inactiveThumbImage,
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onInactiveThumbImageError: onInactiveThumbImageError,
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activeTrackColor: activeTrackColor,
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inactiveTrackColor: inactiveTrackColor,
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configuration: configuration,
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onChanged: onChanged,
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additionalConstraints: additionalConstraints,
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textDirection: Directionality.of(context),
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hasFocus: hasFocus,
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hovering: hovering,
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state: state
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);
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}
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public override void updateRenderObject(BuildContext context, RenderObject renderObjectRaw) {
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_RenderSwitch renderObject = (_RenderSwitch) renderObjectRaw;
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renderObject.value = value;
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renderObject.activeColor = activeColor;
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renderObject.inactiveColor = inactiveColor;
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renderObject.hoverColor = hoverColor;
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renderObject.focusColor = focusColor;
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renderObject.activeThumbImage = activeThumbImage;
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renderObject.onActiveThumbImageError = onActiveThumbImageError;
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renderObject.inactiveThumbImage = inactiveThumbImage;
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renderObject.onInactiveThumbImageError = onInactiveThumbImageError;
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renderObject.activeTrackColor = activeTrackColor;
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renderObject.inactiveTrackColor = inactiveTrackColor;
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renderObject.configuration = configuration;
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renderObject.onChanged = onChanged;
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renderObject.additionalConstraints = additionalConstraints;
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renderObject.textDirection = Directionality.of(context);
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renderObject.dragStartBehavior = dragStartBehavior;
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renderObject.hasFocus = hasFocus;
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renderObject.hovering = hovering;
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renderObject.vsync = state;
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}
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}
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class _RenderSwitch : RenderToggleable {
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public _RenderSwitch(
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bool? value = null,
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Color activeColor = null,
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Color inactiveColor = null,
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Color hoverColor = null,
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Color focusColor = null,
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ImageProvider activeThumbImage = null,
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ImageErrorListener onActiveThumbImageError = null,
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ImageProvider inactiveThumbImage = null,
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ImageErrorListener onInactiveThumbImageError = null,
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Color activeTrackColor = null,
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Color inactiveTrackColor = null,
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ImageConfiguration configuration = null,
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BoxConstraints additionalConstraints = null,
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TextDirection? textDirection = null,
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ValueChanged<bool?> onChanged = null,
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DragStartBehavior? dragStartBehavior = null,
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bool hasFocus = false,
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bool hovering = false,
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_SwitchState state = null
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) : base(
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value: value,
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tristate: false,
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activeColor: activeColor,
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inactiveColor: inactiveColor,
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hoverColor: hoverColor,
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focusColor: focusColor,
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onChanged: onChanged,
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additionalConstraints: additionalConstraints,
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hasFocus: hasFocus,
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hovering: hovering,
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vsync: state
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) {
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D.assert(textDirection != null);
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_activeThumbImage = activeThumbImage;
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_onActiveThumbImageError = onActiveThumbImageError;
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_inactiveThumbImage = inactiveThumbImage;
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_onInactiveThumbImageError = onInactiveThumbImageError;
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_activeTrackColor = activeTrackColor;
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_inactiveTrackColor = inactiveTrackColor;
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_configuration = configuration;
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_drag = new HorizontalDragGestureRecognizer {
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onStart = _handleDragStart,
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onUpdate = _handleDragUpdate,
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onEnd = _handleDragEnd,
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dragStartBehavior = dragStartBehavior ?? DragStartBehavior.down
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};
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}
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public ImageProvider activeThumbImage {
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get { return _activeThumbImage; }
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set {
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if (value == _activeThumbImage) {
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return;
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}
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_activeThumbImage = value;
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markNeedsPaint();
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}
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}
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ImageProvider _activeThumbImage;
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public ImageErrorListener onActiveThumbImageError {
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get { return _onActiveThumbImageError; }
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set {
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if (value == _onActiveThumbImageError) {
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return;
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}
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_onActiveThumbImageError = value;
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markNeedsPaint();
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}
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}
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ImageErrorListener _onActiveThumbImageError;
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public ImageProvider inactiveThumbImage {
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get { return _inactiveThumbImage; }
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set {
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if (value == _inactiveThumbImage) {
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return;
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}
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_inactiveThumbImage = value;
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markNeedsPaint();
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}
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}
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ImageProvider _inactiveThumbImage;
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public ImageErrorListener onInactiveThumbImageError {
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get { return _onInactiveThumbImageError; }
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set {
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if (value == _onInactiveThumbImageError) {
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return;
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}
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_onInactiveThumbImageError = value;
|
|
markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
ImageErrorListener _onInactiveThumbImageError;
|
|
|
|
public Color activeTrackColor {
|
|
get { return _activeTrackColor; }
|
|
set {
|
|
D.assert(value != null);
|
|
if (value == _activeTrackColor) {
|
|
return;
|
|
}
|
|
|
|
_activeTrackColor = value;
|
|
markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
Color _activeTrackColor;
|
|
|
|
public Color inactiveTrackColor {
|
|
get { return _inactiveTrackColor; }
|
|
set {
|
|
D.assert(value != null);
|
|
if (value == _inactiveTrackColor) {
|
|
return;
|
|
}
|
|
|
|
_inactiveTrackColor = value;
|
|
markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
Color _inactiveTrackColor;
|
|
|
|
public ImageConfiguration configuration {
|
|
get { return _configuration; }
|
|
set {
|
|
D.assert(value != null);
|
|
if (value == _configuration) {
|
|
return;
|
|
}
|
|
|
|
_configuration = value;
|
|
markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
ImageConfiguration _configuration;
|
|
|
|
public TextDirection textDirection {
|
|
get { return _textDirection; }
|
|
set {
|
|
if (_textDirection == value) {
|
|
return;
|
|
}
|
|
|
|
_textDirection = value;
|
|
markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
TextDirection _textDirection;
|
|
|
|
public DragStartBehavior? dragStartBehavior {
|
|
get { return _drag.dragStartBehavior; }
|
|
set { _drag.dragStartBehavior = value ?? DragStartBehavior.down; }
|
|
}
|
|
|
|
_SwitchState state;
|
|
|
|
public override bool? value {
|
|
get { return base.value; }
|
|
set {
|
|
D.assert(value != null);
|
|
base.value = value;
|
|
|
|
if (_needsPositionAnimation) {
|
|
_needsPositionAnimation = false;
|
|
position.curve = null;
|
|
position.reverseCurve = null;
|
|
|
|
if (value == true) {
|
|
positionController.forward();
|
|
}
|
|
else {
|
|
positionController.reverse();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public override void detach() {
|
|
_cachedThumbPainter?.Dispose();
|
|
_cachedThumbPainter = null;
|
|
base.detach();
|
|
}
|
|
|
|
float _trackInnerLength {
|
|
get { return size.width - 2.0f * material_.kRadialReactionRadius; }
|
|
}
|
|
|
|
HorizontalDragGestureRecognizer _drag;
|
|
|
|
bool _needsPositionAnimation = false;
|
|
|
|
void _handleDragStart(DragStartDetails details) {
|
|
if (isInteractive) {
|
|
reactionController.forward();
|
|
}
|
|
}
|
|
|
|
void _handleDragUpdate(DragUpdateDetails details) {
|
|
if (isInteractive) {
|
|
position.curve = null;
|
|
position.reverseCurve = null;
|
|
float delta = details.primaryDelta.Value / _trackInnerLength;
|
|
positionController.setValue(positionController.value + delta);
|
|
}
|
|
}
|
|
|
|
void _handleDragEnd(DragEndDetails details) {
|
|
_needsPositionAnimation = true;
|
|
|
|
if ((position.value >= 0.5f) != value) {
|
|
onChanged(!value);
|
|
}
|
|
|
|
reactionController.reverse();
|
|
state._didFinishDragging();
|
|
}
|
|
|
|
public override void handleEvent(PointerEvent evt, HitTestEntry entry) {
|
|
D.assert(debugHandleEvent(evt, entry));
|
|
if (evt is PointerDownEvent && onChanged != null) {
|
|
_drag.addPointer((PointerDownEvent) evt);
|
|
}
|
|
|
|
base.handleEvent(evt, entry);
|
|
}
|
|
|
|
Color _cachedThumbColor;
|
|
ImageProvider _cachedThumbImage;
|
|
ImageErrorListener _cachedThumbErrorListener;
|
|
BoxPainter _cachedThumbPainter;
|
|
|
|
BoxDecoration _createDefaultThumbDecoration(Color color, ImageProvider image,
|
|
ImageErrorListener errorListener) {
|
|
return new BoxDecoration(
|
|
color: color,
|
|
image: image == null ? null : new DecorationImage(image: image, onError: errorListener),
|
|
shape: BoxShape.circle,
|
|
boxShadow: material_.kElevationToShadow[1]
|
|
);
|
|
}
|
|
|
|
bool _isPainting = false;
|
|
|
|
void _handleDecorationChanged() {
|
|
if (!_isPainting) {
|
|
markNeedsPaint();
|
|
}
|
|
}
|
|
|
|
public override void paint(PaintingContext context, Offset offset) {
|
|
Canvas canvas = context.canvas;
|
|
|
|
bool isEnabled = onChanged != null;
|
|
float currentValue = position.value;
|
|
|
|
float visualPosition = currentValue;
|
|
|
|
Color trackColor = isEnabled
|
|
? Color.lerp(inactiveTrackColor, activeTrackColor, currentValue)
|
|
: inactiveTrackColor;
|
|
|
|
Color thumbColor = isEnabled
|
|
? Color.lerp(inactiveColor, activeColor, currentValue)
|
|
: inactiveColor;
|
|
|
|
ImageProvider thumbImage = isEnabled
|
|
? (currentValue < 0.5 ? inactiveThumbImage : activeThumbImage)
|
|
: inactiveThumbImage;
|
|
|
|
ImageErrorListener thumbErrorListener = isEnabled
|
|
? (currentValue < 0.5f ? onInactiveThumbImageError : onActiveThumbImageError)
|
|
: onInactiveThumbImageError;
|
|
|
|
// Paint the track
|
|
Paint paint = new Paint {color = trackColor};
|
|
float trackHorizontalPadding = material_.kRadialReactionRadius - Switch._kTrackRadius;
|
|
Rect trackRect = Rect.fromLTWH(
|
|
offset.dx + trackHorizontalPadding,
|
|
offset.dy + (size.height - Switch._kTrackHeight) / 2.0f,
|
|
size.width - 2.0f * trackHorizontalPadding,
|
|
Switch._kTrackHeight
|
|
);
|
|
RRect trackRRect = RRect.fromRectAndRadius(trackRect, Radius.circular(Switch._kTrackRadius));
|
|
canvas.drawRRect(trackRRect, paint);
|
|
|
|
Offset thumbPosition = new Offset(
|
|
material_.kRadialReactionRadius + visualPosition * _trackInnerLength,
|
|
size.height / 2.0f
|
|
);
|
|
|
|
paintRadialReaction(canvas, offset, thumbPosition);
|
|
|
|
try {
|
|
_isPainting = true;
|
|
BoxPainter thumbPainter;
|
|
if (_cachedThumbPainter == null || thumbColor != _cachedThumbColor ||
|
|
thumbImage != _cachedThumbImage || thumbErrorListener != _cachedThumbErrorListener) {
|
|
_cachedThumbColor = thumbColor;
|
|
_cachedThumbImage = thumbImage;
|
|
_cachedThumbErrorListener = thumbErrorListener;
|
|
_cachedThumbPainter = _createDefaultThumbDecoration(thumbColor, thumbImage, thumbErrorListener)
|
|
.createBoxPainter(_handleDecorationChanged);
|
|
}
|
|
|
|
thumbPainter = _cachedThumbPainter;
|
|
|
|
float inset = 1.0f - (currentValue - 0.5f).abs() * 2.0f;
|
|
float radius = Switch._kThumbRadius - inset;
|
|
thumbPainter.paint(
|
|
canvas,
|
|
thumbPosition + offset - new Offset(radius, radius),
|
|
configuration.copyWith(size: Size.fromRadius(radius))
|
|
);
|
|
}
|
|
finally {
|
|
_isPainting = false;
|
|
}
|
|
}
|
|
}
|
|
}
|