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Draggables Overhaul (#660)

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This commit is contained in:
Luan Nico
2021-02-15 14:06:35 -05:00
committed by GitHub
parent 8e2ba4a4bf
commit 12cafb1da3
22 changed files with 451 additions and 536 deletions
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33
doc/examples/gestures/lib/main_draggables.dart
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@@ -1,6 +1,5 @@
import 'package:flame/components.dart';
import 'package:flame/extensions.dart';
import 'package:flame/gestures.dart';
import 'package:flutter/material.dart' hide Draggable;
import 'package:flame/game.dart';
@@ -32,20 +31,28 @@ class DraggableSquare extends PositionComponent with Draggable {
debugColor = _isDragging ? Colors.greenAccent : Colors.purple;
}
Vector2 initialPosition;
Vector2 dragDeltaPosition;
@override
bool onReceiveDrag(DragEvent event) {
event.onUpdate = (DragUpdateDetails details) {
if (!_isDragging) {
_isDragging = true;
dragDeltaPosition =
event.initialPosition.toVector2() - position.clone();
}
position = details.localPosition.toVector2() - dragDeltaPosition;
};
event.onEnd = (DragEndDetails details) {
_isDragging = false;
};
bool onDragStart(int pointerId, Vector2 startPosition) {
initialPosition = startPosition;
return true;
}
@override
bool onDragUpdate(int pointerId, DragUpdateDetails details) {
if (!_isDragging) {
_isDragging = true;
dragDeltaPosition = initialPosition - position;
}
position = details.localPosition.toVector2() - dragDeltaPosition;
return true;
}
@override
bool onDragEnd(int pointerId, DragEndDetails details) {
_isDragging = false;
return true;
}
}