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169 行
6.1 KiB

using System;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.gestures;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.rendering;
using Unity.UIWidgets.ui;
using Unity.UIWidgets.widgets;
using TextStyle = Unity.UIWidgets.painting.TextStyle;
namespace Unity.UIWidgets.material {
public class RawMaterialButton : StatefulWidget {
public RawMaterialButton(
Key key = null,
VoidCallback onPressed = null,
ValueChanged<bool> onHighlightChanged = null,
TextStyle textStyle = null,
Color fillColor = null,
Color highlightColor = null,
Color splashColor = null,
float elevation = 2.0f,
float highlightElevation = 8.0f,
float disabledElevation = 0.0f,
EdgeInsets padding = null,
BoxConstraints constraints = null,
ShapeBorder shape = null,
TimeSpan? animationDuration = null,
Clip clipBehavior = Clip.none,
MaterialTapTargetSize? materialTapTargetSize = null,
Widget child = null) : base(key: key) {
D.assert(elevation >= 0.0);
D.assert(highlightElevation >= 0.0);
D.assert(disabledElevation >= 0.0);
MaterialTapTargetSize _materialTapTargetSize = materialTapTargetSize ?? MaterialTapTargetSize.padded;
shape = shape ?? new RoundedRectangleBorder();
padding = padding ?? EdgeInsets.zero;
constraints = constraints ?? new BoxConstraints(minWidth: 88.0f, minHeight: 36.0f);
TimeSpan _animationDuration = animationDuration ?? Constants.kThemeChangeDuration;
this.onPressed = onPressed;
this.onHighlightChanged = onHighlightChanged;
this.textStyle = textStyle;
this.fillColor = fillColor;
this.highlightColor = highlightColor;
this.splashColor = splashColor;
this.elevation = elevation;
this.highlightElevation = highlightElevation;
this.disabledElevation = disabledElevation;
this.padding = padding;
this.constraints = constraints;
this.shape = shape;
this.animationDuration = _animationDuration;
this.clipBehavior = clipBehavior;
this.materialTapTargetSize = _materialTapTargetSize;
this.child = child;
}
public readonly VoidCallback onPressed;
public readonly ValueChanged<bool> onHighlightChanged;
public readonly TextStyle textStyle;
public readonly Color fillColor;
public readonly Color highlightColor;
public readonly Color splashColor;
public readonly float elevation;
public readonly float highlightElevation;
public readonly float disabledElevation;
public readonly EdgeInsets padding;
public readonly BoxConstraints constraints;
public readonly ShapeBorder shape;
public readonly TimeSpan animationDuration;
public readonly Widget child;
public bool enabled {
get { return onPressed != null; }
}
public readonly MaterialTapTargetSize materialTapTargetSize;
public readonly Clip clipBehavior;
public override State createState() {
return new _RawMaterialButtonState();
}
}
class _RawMaterialButtonState : State<RawMaterialButton> {
bool _highlight = false;
void _handleHighlightChanged(bool value) {
if (_highlight != value) {
setState(() => {
_highlight = value;
if (widget.onHighlightChanged != null) {
widget.onHighlightChanged(value);
}
});
}
}
public override void didUpdateWidget(StatefulWidget _oldWidget) {
RawMaterialButton oldWidget = _oldWidget as RawMaterialButton;
base.didUpdateWidget(oldWidget);
if (_highlight && !widget.enabled) {
_highlight = false;
if (widget.onHighlightChanged != null) {
widget.onHighlightChanged(false);
}
}
}
public override Widget build(BuildContext context) {
float elevation = widget.enabled
? (_highlight ? widget.highlightElevation : widget.elevation)
: widget.disabledElevation;
Widget result = new ConstrainedBox(
constraints: widget.constraints,
child: new Material(
elevation: elevation,
textStyle: widget.textStyle,
shape: widget.shape,
color: widget.fillColor,
type: widget.fillColor == null ? MaterialType.transparency : MaterialType.button,
animationDuration: widget.animationDuration,
clipBehavior: widget.clipBehavior,
child: new InkWell(
onHighlightChanged: this._handleHighlightChanged,
splashColor: widget.splashColor,
highlightColor: widget.highlightColor,
onTap: widget.onPressed == null
? (GestureTapCallback) null
: () => {
if (widget.onPressed != null) {
widget.onPressed();
}
},
customBorder: widget.shape,
child: IconTheme.merge(
data: new IconThemeData(color: widget.textStyle?.color),
child: new Container(
padding: widget.padding,
child: new Center(
widthFactor: 1.0f,
heightFactor: 1.0f,
child: widget.child)
)
)
)
)
);
return result;
}
}
}