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
 
 
 
 
 
 

297 行
11 KiB

using System;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.ui;
using UnityEngine;
using Canvas = Unity.UIWidgets.ui.Canvas;
using Color = Unity.UIWidgets.ui.Color;
using Rect = Unity.UIWidgets.ui.Rect;
using TextStyle = Unity.UIWidgets.painting.TextStyle;
namespace Unity.UIWidgets.widgets {
class BannerConstants {
public const float _kOffset = 40.0f;
public const float _kHeight = 12.0f;
public const float _kBottomOffset = _kOffset + 0.707f * _kHeight;
public static readonly Rect _kRect = Rect.fromLTWH(-_kOffset, _kOffset - _kHeight, _kOffset * 2.0f, _kHeight);
public static readonly Color _kColor = new Color(0xA0B71C1C);
public static readonly TextStyle _kTextStyle = new TextStyle(
color: new Color(0xFFFFFFFF),
fontSize: _kHeight * 0.85f,
fontWeight: FontWeight.w700,
height: 1.0f
);
}
public enum BannerLocation {
topStart,
topEnd,
bottomStart,
bottomEnd,
}
public class BannerPainter : AbstractCustomPainter {
public BannerPainter(
string message = null,
TextDirection? textDirection = null,
BannerLocation? location = null,
TextDirection? layoutDirection = null,
Color color = null,
TextStyle textStyle = null
) : base (repaint: PaintingBinding.instance.systemFonts) {
D.assert(message != null);
D.assert(textDirection != null);
D.assert(location != null);
this.message = message;
this.textDirection = textDirection;
this.location = location;
this.layoutDirection = layoutDirection;
this.color = color ?? BannerConstants._kColor;
this.textStyle = textStyle ?? BannerConstants._kTextStyle;
}
public readonly string message;
public readonly TextDirection? textDirection;
public readonly BannerLocation? location;
public readonly TextDirection? layoutDirection;
public readonly Color color;
public readonly TextStyle textStyle;
readonly BoxShadow _shadow = new BoxShadow(
color: new Color(0x7F000000),
blurRadius: 6.0f
);
bool _prepared = false;
TextPainter _textPainter;
Paint _paintShadow;
Paint _paintBanner;
void _prepare() {
_paintShadow = _shadow.toPaint();
_paintBanner = new Paint();
_paintBanner.color = color;
_textPainter = new TextPainter(
text: new TextSpan(style: textStyle, text: message),
textAlign: TextAlign.center,
textDirection: textDirection ?? TextDirection.ltr
);
_prepared = true;
}
public override void paint(Canvas canvas, Size size) {
if (!_prepared) {
_prepare();
}
canvas.translate(_translationX(size.width), _translationY(size.height));
canvas.rotate(_rotation);
canvas.drawRect(BannerConstants._kRect, _paintShadow);
canvas.drawRect(BannerConstants._kRect, _paintBanner);
const float width = BannerConstants._kOffset * 2.0f;
_textPainter.layout(minWidth: width, maxWidth: width);
_textPainter.paint(canvas,
BannerConstants._kRect.topLeft + new Offset(0.0f,
(BannerConstants._kRect.height - _textPainter.height) / 2.0f));
}
public override bool shouldRepaint(CustomPainter _oldDelegate) {
BannerPainter oldDelegate = _oldDelegate as BannerPainter;
return message != oldDelegate.message
|| location != oldDelegate.location
|| color != oldDelegate.color
|| textStyle != oldDelegate.textStyle;
}
public override bool? hitTest(Offset position) {
return false;
}
float _translationX(float width) {
D.assert(location != null);
D.assert(layoutDirection != null);
switch (layoutDirection) {
case TextDirection.rtl:
switch (location) {
case BannerLocation.bottomEnd:
return BannerConstants._kBottomOffset;
case BannerLocation.topEnd:
return 0.0f;
case BannerLocation.bottomStart:
return width - BannerConstants._kBottomOffset;
case BannerLocation.topStart:
return width;
}
break;
case TextDirection.ltr:
switch (location) {
case BannerLocation.bottomEnd:
return width - BannerConstants._kBottomOffset;
case BannerLocation.topEnd:
return width;
case BannerLocation.bottomStart:
return BannerConstants._kBottomOffset;
case BannerLocation.topStart:
return 0.0f;
}
break;
}
return 0.0f;
}
float _translationY(float height) {
D.assert(location != null);
switch (location) {
case BannerLocation.bottomStart:
case BannerLocation.bottomEnd:
return height - BannerConstants._kBottomOffset;
case BannerLocation.topStart:
case BannerLocation.topEnd:
return 0.0f;
default:
throw new Exception("Unknown location: " + location);
}
}
float _rotation {
get {
D.assert(location != null);
D.assert(layoutDirection != null);
switch (layoutDirection) {
case TextDirection.rtl:
switch (location) {
case BannerLocation.bottomStart:
case BannerLocation.topEnd:
return -Mathf.PI / 4.0f;
case BannerLocation.bottomEnd:
case BannerLocation.topStart:
return Mathf.PI / 4.0f;
}
break;
case TextDirection.ltr:
switch (location) {
case BannerLocation.bottomStart:
case BannerLocation.topEnd:
return Mathf.PI / 4.0f;
case BannerLocation.bottomEnd:
case BannerLocation.topStart:
return -Mathf.PI / 4.0f;
}
break;
}
return 0.0f;
}
}
}
public class Banner : StatelessWidget {
public Banner(
Key key = null,
Widget child = null,
string message = null,
TextDirection? textDirection = null,
BannerLocation? location = null,
TextDirection? layoutDirection = null,
Color color = null,
TextStyle textStyle = null
) : base(key: key) {
D.assert(message != null);
D.assert(location != null);
this.child = child;
this.message = message;
this.layoutDirection = layoutDirection;
this.textDirection = textDirection;
this.location = location;
this.color = color ?? BannerConstants._kColor;
this.textStyle = textStyle ?? BannerConstants._kTextStyle;
}
public readonly Widget child;
public readonly string message;
public readonly TextDirection? textDirection;
public readonly TextDirection? layoutDirection;
public readonly BannerLocation? location;
public readonly Color color;
public readonly TextStyle textStyle;
public override Widget build(BuildContext context) {
D.assert((textDirection != null && layoutDirection != null)|| WidgetsD.debugCheckHasDirectionality(context));
return new CustomPaint(
foregroundPainter: new BannerPainter(
message: message,
textDirection: textDirection ?? Directionality.of(context),
location: location,
layoutDirection: layoutDirection ?? Directionality.of(context),
color: color,
textStyle: textStyle
),
child: child
);
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
properties.add(new StringProperty("message", message, showName: false));
properties.add(new EnumProperty<TextDirection>("textDirection", (TextDirection)textDirection, defaultValue: null));
properties.add(new EnumProperty<BannerLocation>("location", (BannerLocation)location));
properties.add(new EnumProperty<TextDirection>("layoutDirection", (TextDirection)layoutDirection, defaultValue: null));
properties.add(new ColorProperty("color", color, showName: false));
textStyle?.debugFillProperties(properties, prefix: "text ");
}
}
public class CheckedModeBanner : StatelessWidget {
public CheckedModeBanner(
Key key = null,
Widget child = null
) : base(key: key) {
D.assert(child != null);
this.child = child;
}
public readonly Widget child;
public override Widget build(BuildContext context) {
Widget result = child;
D.assert(() => {
result = new Banner(
child: result,
message: "DEBUG",
textDirection: TextDirection.ltr,
location: BannerLocation.topEnd
);
return true;
});
return result;
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
string message = "disabled";
D.assert(() => {
message = "'DEBUG'";
return true;
});
properties.add(DiagnosticsNode.message(message));
}
}
}