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[infra_ui][overlar] Implement corner aligned anchor mode and update example project

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This commit is contained in:
Jaylen Bian 2021-08-01 19:17:24 +08:00
parent ada5ab737e
commit dffb56d1a9
2 changed files with 115 additions and 79 deletions
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36
app_flowy/packages/flowy_infra_ui/example/lib/overlay/overlay_screen.dart
View File

@ -1,5 +1,6 @@
import 'package:flowy_infra_ui/flowy_infra_ui_web.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../home/demo_item.dart';
@ -19,6 +20,19 @@ class OverlayItem extends DemoItem {
}
}
class OverlayDemoAnchorDirection extends ChangeNotifier {
OverlayDemoAnchorDirection(this._anchorDirection);
AnchorDirection _anchorDirection;
AnchorDirection get anchorDirection => _anchorDirection;
set anchorDirection(AnchorDirection value) {
_anchorDirection = value;
notifyListeners();
}
}
class OverlayScreen extends StatelessWidget {
const OverlayScreen({Key? key}) : super(key: key);
@ -28,8 +42,22 @@ class OverlayScreen extends StatelessWidget {
appBar: AppBar(
title: const Text('Overlay Demo'),
),
body: Column(
body: ChangeNotifierProvider(
create: (context) => OverlayDemoAnchorDirection(AnchorDirection.topLeft),
child: Builder(builder: (context) {
return Column(
children: [
DropdownButton<AnchorDirection>(
value: context.watch<OverlayDemoAnchorDirection>().anchorDirection,
onChanged: (AnchorDirection? newValue) {
if (newValue != null) {
context.read<OverlayDemoAnchorDirection>().anchorDirection = newValue;
}
},
items: AnchorDirection.values.map((AnchorDirection classType) {
return DropdownMenuItem<AnchorDirection>(value: classType, child: Text(classType.toString()));
}).toList(),
),
Flexible(
child: Padding(
padding: const EdgeInsets.all(16.0),
@ -73,7 +101,7 @@ class OverlayScreen extends StatelessWidget {
identifier: 'overlay_card',
delegate: null,
anchorContext: buttonContext,
anchorDirection: AnchorDirection.topLeft,
anchorDirection: context.read<OverlayDemoAnchorDirection>().anchorDirection,
);
},
child: const Text('Show Anchored Overlay'),
@ -99,12 +127,14 @@ class OverlayScreen extends StatelessWidget {
delegate: null,
anchorPosition: Offset(0, windowSize.height - 200),
anchorSize: Size.zero,
anchorDirection: AnchorDirection.topLeft,
anchorDirection: context.read<OverlayDemoAnchorDirection>().anchorDirection,
);
},
child: const Text('Show Positioned Overlay'),
),
],
);
}),
));
}
}

18
app_flowy/packages/flowy_infra_ui/lib/src/flowy_overlay/overlay_layout_delegate.dart
View File

@ -39,17 +39,23 @@ class OverlayLayoutDelegate extends SingleChildLayoutDelegate {
Offset position;
switch (anchorDirection) {
case AnchorDirection.topLeft:
position = Offset(
anchorRect.left - childSize.width,
anchorRect.top - childSize.height,
);
position = Offset(anchorRect.left - childSize.width, anchorRect.top - childSize.height);
break;
case AnchorDirection.topRight:
position = Offset(anchorRect.right, anchorRect.top - childSize.height);
break;
case AnchorDirection.bottomLeft:
position = Offset(anchorRect.left - childSize.width, anchorRect.bottom);
break;
case AnchorDirection.bottomRight:
position = Offset(anchorRect.right, anchorRect.bottom);
break;
default:
throw UnimplementedError();
}
return Offset(
math.max(0.0, math.min(size.width, position.dx)),
math.max(0.0, math.min(size.height, position.dy)),
math.max(0.0, math.min(size.width - childSize.width, position.dx)),
math.max(0.0, math.min(size.height - childSize.height, position.dy)),
);
}
}