public Widget _build(BuildContext context, BoxConstraints constraints)
{
if (this._ink == null)
{
this._ink = new InkDecoration(
decoration: this.widget.decoration,
configuration: ImageUtils.createLocalImageConfiguration(context),
controller: Material.of(context),
referenceBox: (RenderBox)context.findRenderObject(),
onRemoved: this._handleRemoved
);
}
else
{
this._ink.decoration = this.widget.decoration;
this._ink.configuration = ImageUtils.createLocalImageConfiguration(context);
}
Widget current = this.widget.child;
EdgeInsets effectivePadding = this.widget._paddingIncludingDecoration;
if (effectivePadding != null)
{
current = new Padding(
padding: effectivePadding,
child: current);
}
return(current);
}
Widget buildMaterialSwitch(BuildContext context)
{
D.assert(MaterialD.debugCheckHasMaterial(context));
ThemeData theme = Theme.of(context);
bool isDark = theme.brightness == Brightness.dark;
Color activeThumbColor = this.widget.activeColor ?? theme.toggleableActiveColor;
Color activeTrackColor = this.widget.activeTrackColor ?? activeThumbColor.withAlpha(0x80);
Color inactiveThumbColor;
Color inactiveTrackColor;
if (this.widget.onChanged != null)
{
Color black32 = new Color(0x52000000); // Black with 32% opacity
inactiveThumbColor = this.widget.inactiveThumbColor ??
(isDark ? Colors.grey.shade400 : Colors.grey.shade50);
inactiveTrackColor = this.widget.inactiveTrackColor ?? (isDark ? Colors.white30 : black32);
}
else
{
inactiveThumbColor = this.widget.inactiveThumbColor ??
(isDark ? Colors.grey.shade800 : Colors.grey.shade400);
inactiveTrackColor = this.widget.inactiveTrackColor ?? (isDark ? Colors.white10 : Colors.black12);
}
return(new _SwitchRenderObjectWidget(
dragStartBehavior: this.widget.dragStartBehavior,
value: this.widget.value,
activeColor: activeThumbColor,
inactiveColor: inactiveThumbColor,
activeThumbImage: this.widget.activeThumbImage,
inactiveThumbImage: this.widget.inactiveThumbImage,
activeTrackColor: activeTrackColor,
inactiveTrackColor: inactiveTrackColor,
configuration: ImageUtils.createLocalImageConfiguration(context),
onChanged: this.widget.onChanged,
additionalConstraints: BoxConstraints.tight(this.getSwitchSize(theme)),
vsync: this
));
}
public override void initState()
{
base.initState();
this._scaleAnimationController = new AnimationController(
duration: TimeSpan.FromMilliseconds(100),
vsync: this);
this._scaleAnimationController.addListener(listener: this._onScaleAndPositionChanged);
this._scaleAnimation = new FloatTween(1.0f, 1.0f).animate(parent: this._scaleAnimationController);
this._positionAnimationController = new AnimationController(
duration: TimeSpan.FromMilliseconds(100),
vsync: this);
this._positionAnimation =
new OffsetTween(begin: Offset.zero, end: Offset.zero).animate(parent: this._scaleAnimationController);
this._positionAnimationController.addListener(
listener: this._onScaleAndPositionChanged
);
this._inertiaAnimationController = new AnimationController(
duration: TimeSpan.FromMilliseconds(1000),
vsync: this);
this._inertiaAnimationController.addListener(listener: this._onScaleAndPositionChanged);
this._inertiaAnimationController.addStatusListener(status => {
if (status == AnimationStatus.completed)
{
var clampedPosition = this._clampPosition(position: this._position, scale: this._scale);
this._positionAnimation =
new OffsetTween(begin: clampedPosition, end: clampedPosition).animate(
parent: this._positionAnimationController);
this._positionAnimationController.reset();
}
});
if (!this.widget.useCachedNetworkImage)
{
SchedulerBinding.instance.addPostFrameCallback(_ => {
this._imageStream = new NetworkImage(url: this.widget.url,
headers: this.widget.headers).resolve(ImageUtils.createLocalImageConfiguration(
context: this.context
));
this._imageStream.addListener((imageInfo, __) => {
this.setState(() => { this._onImageResolved(imageInfo: imageInfo); });
});
});
}
}