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a94999ba50
Each layer is supposed to reexport the parts of the previous layer that are part of its API. - In painting.dart, export from dart:ui all the Canvas-related APIs that make sense to be used at higher levels, e.g. PaintingStyle. - Delete painting/shadows.dart. It was dead code. - In rendering/object.dart, export all of painting.dart. - In widgets/basic.dart, export all of painting.dart and animation.dart. Some classes in animation/ are renamed to make this less disruptive and confusing to the namespace. - Split out Stocks back into an import model rather than a part model, so that it's easier to manage its dependencies on a per-file basis. - Move Ticker to scheduler library. - Remove as many redundant imports as possible now. - Some minor nit picking cleanup in various files.
63 lines
1.8 KiB
Dart
63 lines
1.8 KiB
Dart
part of flutter_sprites;
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class VirtualJoystick extends NodeWithSize {
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VirtualJoystick() : super(new Size(160.0, 160.0)) {
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userInteractionEnabled = true;
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handleMultiplePointers = false;
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position = new Point(160.0, -20.0);
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pivot = new Point(0.5, 1.0);
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_center = new Point(size.width / 2.0, size.height / 2.0);
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_handlePos = _center;
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_paintHandle = new Paint()
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..color=new Color(0xffffffff);
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_paintControl = new Paint()
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..color=new Color(0xffffffff)
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..strokeWidth = 1.0
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..style = PaintingStyle.stroke;
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}
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Point _value = Point.origin;
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Point get value => _value;
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bool _isDown = false;
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bool get isDown => _isDown;
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Point _pointerDownAt;
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Point _center;
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Point _handlePos;
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Paint _paintHandle;
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Paint _paintControl;
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bool handleEvent(SpriteBoxEvent event) {
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if (event.type == PointerDownEvent) {
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_pointerDownAt = event.boxPosition;
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actions.stopAll();
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_isDown = true;
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}
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else if (event.type == PointerUpEvent || event.type == PointerCancelEvent) {
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_pointerDownAt = null;
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_value = Point.origin;
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ActionTween moveToCenter = new ActionTween((a) => _handlePos = a, _handlePos, _center, 0.4, Curves.elasticOut);
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actions.run(moveToCenter);
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_isDown = false;
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} else if (event.type == PointerMoveEvent) {
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Offset movedDist = event.boxPosition - _pointerDownAt;
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_value = new Point(
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(movedDist.dx / 80.0).clamp(-1.0, 1.0),
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(movedDist.dy / 80.0).clamp(-1.0, 1.0));
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_handlePos = _center + new Offset(_value.x * 40.0, _value.y * 40.0);
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}
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return true;
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}
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void paint(Canvas canvas) {
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applyTransformForPivot(canvas);
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canvas.drawCircle(_handlePos, 25.0, _paintHandle);
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canvas.drawCircle(_center, 40.0, _paintControl);
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}
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}
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